Class Wiki - User contributions [en]

Electromechanical Energy Conversion

2010-01-25T01:43:18Z

Tyler.anderson: /* Article Suggestions */

[[Rules]]

[[Class Roster]]

[[Points]]

==Questions==

What do we do when we are finished with the draft and ready to publish?
* If it's been approved by the reviewers, move it to the articles section

==Announcements==

If anyone wants to write the derivation of Ampere's Law you can put it on my (Wesley Brown) [[Ampere's Law]] page and be a co-author.

==Article Suggestions==
(Please remove these when you complete the article.)
# Rewrite the notes for the wiki.
# Draw and explain the effect of the non-linear B-H curve on current waveforms for a voltage excited inductor.
# Explain how to measure the B-H curve experimentally.
# If the B-H curve was traced out more quickly in the experiment above, would the curve look different? If so why?
# Show how to calculate the core losses of a nonlinear inductor using its i-v curve.
# Explore transformers with more than one secondary winding.
# What is the input impedance of an idea transformer with two secondaries, one with N2 turns and one with N3 turns, each with a different load resistor on attached.
# How do the mutual impedances relate to the turns ratios in transformers with more than one secondary?
# Develop a circuit model for a non-ideal transformer with multiple secondaries.
# Develop the theory of autotransformers.
# Explore how leakage flux affects the inductance of an inductor. What if that flux is then recovered and the effect accounted for by mutual inductance? Does the result agree with the simple calculation of inductance without leakage?
# Describe the coupling factor, k, used in Spice simulators and other circuit simulators. Relate it to the leakage, magnetizing, and mutual inductances.
# Derive the <math>Y/\Delta</math> transformations.
# Explore the voltage regulation <math>(V_{full ~load} - V_{no ~load} ) \over {V_{full ~load} } </math>x 100% as a function of the power factor angle on the load of a transformer. (You will note some surprising results in some cases.)
# Describe the open circuit and short circuit test as applied to transformers.
# Calculate and compare how much power can be delivered with three phase circuits as compared to a single phase circuits. Assume that the same amount of copper is available for the wire of both systems.
# And if you don't understand any of the above, no surprise.

==Draft Articles==
These articles are not ready for reading and error checking. They are listed so people will not simultaneously write about similar topics.
* [[Ferromagnetism]]
* [[Magnetic Circuits]]
* [[Example: Ampere's Law]] (Tyler Anderson)
* [[Ampere's Law]]
* [[DC Motor]]
* [[Fringing]]
* [[Electrostatics]]
* [[Faraday's Law]]
* [[Eddy Current]]
* [[Example Problems of Magnetic Circuits]]
* [[Ohm's Law and Reluctance]]
* [[Magnetic Flux]]
* [[An Ideal Transformer Example]]
* [[Example: Ideal Transformer Exercise]] (John Hawkins)
* [[Reference Terms and Units]] (Amy Crosby)
* [[Ideal Transformer Example|Example: Ideal Transformer]]
* [[Problem Set 1]](Jodi Hodge)
* [[ANOTHER IDEAL TRANSFORMER!!!!!!!!!]]
* [[Example: Magnetic Field]] (Amy Crosby)
* [[Example: Metal Cart]] (Amy Crosby)
* [[Class Notes]](Tyler Anderson)

==Reviewed Articles==
These articles have been reviewed and submitted.
* [[Gauss Meters]] (Tyler Anderson)
* [[Nick_ENGR431_P1|Magnetostatics]] (Nick Christman)
* [[Magnetic Flux]] (Jason Osborne)
*[[An Application of Electromechanical Energy Conversion: Hybrid Electric Vehicles]] (Chris Lau)

* [[Magnetic Circuit]] (John Hawkins)
* [[AC Motors]]
* [[Example Problem - Toroid]] ([[Kirk Betz]])
* [[Transformer_example_problem|Ideal Transformer Example]] (Tim Rasmussen)
* [[AC vs. DC]] (Wesley Brown)

Class Notes

2010-01-25T00:51:47Z

Tyler.anderson: /* Notes */

File:0124101649.jpg

2010-01-25T00:51:20Z

Tyler.anderson: page 4

page 4

Class Notes

2010-01-25T00:48:55Z

Tyler.anderson: /* Notes */

File:0124101642.jpg

2010-01-25T00:48:38Z

Tyler.anderson: page 3

page 3

File:0124101638.jpg

2010-01-25T00:48:01Z

Tyler.anderson: page 2

page 2

Class Notes

2010-01-25T00:47:46Z

Tyler.anderson:

===Notes===
These are notes I took in class.

[[Image:0124101636.jpg|thumb|widthpx| ]]

Class Notes

2010-01-25T00:47:08Z

Tyler.anderson: New page: These are notes I took in class.

These are notes I took in class.

[[Image:0124101636.jpgthumb|widthpx| ]]

File:0124101636.jpg

2010-01-25T00:46:23Z

Tyler.anderson: page 1

page 1

Electromechanical Energy Conversion

2010-01-25T00:46:01Z

Tyler.anderson: /* Draft Articles */

[[Rules]]

[[Class Roster]]

[[Points]]

==Questions==

What do we do when we are finished with the draft and ready to publish?
* If it's been approved by the reviewers, move it to the articles section

==Announcements==

If anyone wants to write the derivation of Ampere's Law you can put it on my (Wesley Brown) [[Ampere's Law]] page and be a co-author.

==Article Suggestions==
(Please remove these when you complete the article.)
# Rewrite the notes for the wiki.
# Draw and explain the effect of the non-linear B-H curve on current waveforms for a voltage excited inductor.
# Explain how to measure the B-H curve experimentally.
# If the B-H curve was traced out more quickly in the experiment above, would the curve look different? If so why?
# Show how to calculate the core losses of a nonlinear inductor using its i-v curve.
# Explore transformers with more than one secondary winding.
# What is the input impedance of an idea transformer with two secondaries, one with N2 turns and one with N3 turns, each with a different load resistor on attached.
# How do the mutual impedances relate to the turns ratios in transformers with more than one secondary?
# Develop a circuit model for a non-ideal transformer with multiple secondaries.
# Develop the theory of autotransformers.
# Explore how leakage flux affects the inductance of an inductor. What if that flux is then recovered and the effect accounted for by mutual inductance? Does the result agree with the simple calculation of inductance without leakage?
# Describe the coupling factor, k, used in Spice simulators and other circuit simulators. Relate it to the leakage, magnetizing, and mutual inductances.
# Derive the <math>Y/\Delta</math> transformations.
# Explore the voltage regulation <math>(V_{full ~load} - V_{no ~load} ) \over {V_{full ~load} } </math>x 100% as a function of the power factor angle on the load of a transformer. (You will note some surprising results in some cases.)
# Describe the open circuit and short circuit test as applied to transformers.
# Calculate and compare how much power can be delivered with three phase circuits as compared to a single phase circuits. Assume that the same amount of copper is available for the wire of both systems.

==Draft Articles==
These articles are not ready for reading and error checking. They are listed so people will not simultaneously write about similar topics.
* [[Ferromagnetism]]
* [[Magnetic Circuits]]
* [[Example: Ampere's Law]] (Tyler Anderson)
* [[Ampere's Law]]
* [[DC Motor]]
* [[Fringing]]
* [[Electrostatics]]
* [[Faraday's Law]]
* [[Eddy Current]]
* [[Example Problems of Magnetic Circuits]]
* [[Ohm's Law and Reluctance]]
* [[Magnetic Flux]]
* [[An Ideal Transformer Example]]
* [[Example: Ideal Transformer Exercise]] (John Hawkins)
* [[Reference Terms and Units]] (Amy Crosby)
* [[Ideal Transformer Example|Example: Ideal Transformer]]
* [[Problem Set 1]](Jodi Hodge)
* [[ANOTHER IDEAL TRANSFORMER!!!!!!!!!]]
* [[Example: Magnetic Field]] (Amy Crosby)
* [[Example: Metal Cart]] (Amy Crosby)
* [[Class Notes]](Tyler Anderson)

==Reviewed Articles==
These articles have been reviewed and submitted.
* [[Gauss Meters]] (Tyler Anderson)
* [[Nick_ENGR431_P1|Magnetostatics]] (Nick Christman)
* [[Magnetic Flux]] (Jason Osborne)
*[[An Application of Electromechanical Energy Conversion: Hybrid Electric Vehicles]] (Chris Lau)

* [[Magnetic Circuit]] (John Hawkins)
* [[AC Motors]]
* [[Example Problem - Toroid]] ([[Kirk Betz]])
* [[Transformer_example_problem|Ideal Transformer Example]] (Tim Rasmussen)
* [[AC vs. DC]] (Wesley Brown)

An Ideal Transformer Example

2010-01-25T00:34:54Z

Tyler.anderson: /* Reviwed By */

Consider a simple, transformer with two windings. Find the current provided by the voltage source.
* Winding 1 has a sinusoidal voltage of <math>120\sqrt{2}\angle{0}</math>° applied to it at a frequency of 60Hz.
* <math>\frac{N_{1}}{N_{2}}=3</math>
* The combined load on winding 2 is <math>\ {Z_{L}}=(5+j3)\Omega</math>
===Solution===
Given:
<math>\ {e_{1}}(t)={V_{1}}\cos(\omega t)</math> and <math>\ \omega=2\pi f</math>

Substituting <math>\ f = 60Hz</math>, <math>\ \omega=120\pi</math>

Therefore, <math>\ {e_{1}}(t)=120\sqrt{2}\cos(120\pi t)V</math>

Now the Thevenin equivalent impedance, <math>\ {Z_{th}}</math>, is found through the following steps:

<math>{Z_{th}} = \frac{e_{1}}{i_{1}}</math>

Since this is an ideal transformer <math>{e_{1}}=\frac{N_{1}}{N_{2}}{e_{2}}</math> and <math>{i_{1}}=\frac{N_{2}}{N_{1}}{i_{2}}</math>

So we can substitute, <math>{Z_{th}}=\frac{\frac{N_{1}}{N_{2}}{e_{2}}}{\frac{N_{2}}{N_{1}}{i_{2}}}</math>

<math>=(\frac{N_{1}}{N_{2}})^2{Z_{L}}</math>

Now, plugging in the given values:

<math>\ {Z_{th}} = 3^2(5+j3)</math>

<math>\ =(45+j27)\Omega</math>

Since this is an ideal transformer, it can be modeled by this simple circuit:
[[Image: Ideal_Circuit.jpg]]

Therefore, <math>{i_{1}}=\frac{e_{1}}{Z_{th}}</math>,

<math>{i_{1}}=\frac{120\sqrt{2}}{45+j27} A</math>

===Contributors===

[[Lau, Chris|Christopher Garrison Lau I]]

===Reviwed By===
Andrew Sell - Chris, everything looks fine, though I would do some extra formatting if possible to help make the problem flow a little smoother as you read it, and locate the picture a little higher to help bring the solution together.

Tyler Anderson - Looks good.

===Read By===

John Hawkins

AC Motors

2010-01-22T20:42:49Z

Tyler.anderson: /* Readers: */

== Basic Parts and Principles ==

Electric motors convert electrical energy into mechanical motion by using magnetic forces to accelerate objects. Electricity comes in two flavors: [[AC vs. DC| AC and DC]]<ref>http://fweb/class-wiki/index.php/AC_vs._DC</ref>. Therefore, electric motors need to be able to utilize at least one of these in order to operate. As a general rule, AC and [[DC Motor|DC]] motors are constructed using slightly different parts because of the different behavior of the types of electricity. Lets first look at the parts in a generic AC motor and then discuss the role they play in making motion.

AC motors consist mainly of a stator and an armature<ref>http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/motorac.html</ref>. The stator is fixed inside the motor. Stators are almost always made using tightly wound wire in order to yield a high magnetic flux density. The second part is the rotor, which rotates to provide movement to whatever application is desired. The rotor can also use wound wire, through which current flows or a permanent magnet. In order to get this current to the rotor without tangling wires around the rotor, metal slip rings are used to complete the circuit<ref>http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/motorac.html</ref>.

Magnetic flux is created when current passes through the armature wires. Since the motor uses alternating current, the magnetic field will alternate the polarity. Both the stator and rotor produce magnetic fields. The basic interaction between magnetic fields indicates that opposite poles attract while like poles repel. All electric motors use this behavior to produce rotation. When the poles of the stator and rotor are the same, the force will push the two apart. Similarly, the stator and rotor will be pulled together. Motors use both of these simultaneously to impart motion to the rotor, to which the output shaft is attached. This rotation can be used to do useful mechanical work.

==Synchronous AC Motors==
Synchronous motors are termed "synchronous" because they inherently run at a constant velocity which is synchronized with the frequency of the AC power supply. These motors contain the same two basic components common to all motors: A rotor - the components that rotate, and a stator - the outside shell of the motor. The rotor can be made from either a permanent magnet or winding powered by a DC power source. When powered, this winding operates as a permanent magnet. The rotor has 2 poles in the simplest case, but can have many more depending on the application. The stator holds the armature winding which creates a pulsating magnetic field inside the motor. The armature winding can be either single or multi-phase depending on the configuration of the motor.

Synchronous motors create a torque from the magnetic field of the rotor interacting with the alternating field created by the armature. The field created by the armature is continuously changing because the coils are powered by an AC source. As the voltage in the windings swings from positive to negative, the magnetic field also shifts<ref>http://www.allaboutcircuits.com/vol_2/chpt_13/2.html</ref>. As this field shifts from north to south, the poles on the rotor inside of the motor will be either attracted or repelled from the coils of the armature. These attraction and repulsion forces create a torque which drives the rotor.

[[Image:Synchronous_Motor.JPG]]<ref>http://www.allaboutcircuits.com/vol_2/chpt_13/2.html</ref>

Synchronous motors are unique in that they are not self starting. This is because as soon as voltage is applied to the armature windings, the magnetic field varies at the frequency of power line. At start up, this field builds so quickly that the rotor can not get up to speed and synchronize with the varying armature winding. Several different methods can be used to start synchronous motors. First and most simply, a secondary motor can be used to start the rotor spinning at the rotational velocity corresponding to the frequency of field shift. As soon as the rotor achieves this velocity, it "snaps in" to synchronism and the secondary motor can be shut down or disconnected<ref>http://www.acsynchronousmotors.com/</ref>. Large Synchronous motors can also employ a separate starting mechanism in the rotor. A squirrel cage winding in the rotor can be fed with DC power through slip rings to bring the rotor up to speed<ref>http://www.electricmotors.machinedesign.com/guiEdits/Content/bdeee2/bdeee2_1-5.aspx</ref>. As the synchronous motor of this type starts, it essentially operates as a DC motor until it reaches the operating speed of the AC line.

==Induction Motors==
Induction motors are termed "induction" because there is no current supplied to the rotating coils in the rotor. The coils are closed loops which have large currents induced in them by the changing magnetic field produced in the stator coils<ref>http://hyperphysics.phy-astr.gsu.edu/HBASE/magnetic/indmot.html</ref>. This is different from synchronous AC motors which can have a current supplied onto the rotors.

There are two main types of induction motors. The first type is an adjustable-speed drive. These are used in the process control industry to adjust the speed of fans, compressors, pumps, blowers, etc. Also, these are used for electric traction in hybrid vehicles. The second type is a servo drive. These emulate the performance of a DC-motor drive and are used in machine tools, robotics, etc for highly precise control.

====Squirrel-Cage Induction Motor====

[[Image:Squirrel-cage-induction-motor.gif|thumb|right|200px|Squirrel-Cage AC Motor<ref>http://en.wikipedia.org/wiki/File:Induction-motor-3a.gif</ref>]]
Squirrel cage motors are the most common forms of AC induction motors. They are commonly used in adjustable-speed applications. The cage has bars of copper or aluminum running the length of the rotor. In most working motors, the bars are skewed from following the axial direction of the motor to reduce noise. The bars are electrically shorted at each end of the rotor by end rings, and thus producing a cage like structure.

The stator of an induction motor has three windings which are displaced by 120o with respect to each other. <ref>Electric Drives by Ned Mohan</ref>
[[Image:Stator_Windings.JPG|300px]]

These stator windings are arranged around the rotor so that when energized with an alternating current they create a rotating magnetic field which sweep past the rotor. The changing magnetic field induces a current in the squirrel-cage of the rotor. The currents interact with the rotating magnetic field produced by the stator windings and produces a torque on the rotor.<ref>http://en.wikipedia.org/wiki/Induction_motor</ref>.

==References:==
<references/>

==Authors:==
[[Alex Roddy]]

[[Tim Rasmussen]]

[[Kyle Lafferty]]

==Reviewers:==
[[Wesley Brown]]

[[Erik Biesenthal]]

[[Will Griffith]]

[[Kirk Betz]]

==Readers:==
[[Lau, Chris|Christopher Garrison Lau I]]

Tyler Anderson

Ideal Transformer Example

2010-01-22T20:38:57Z

Tyler.anderson: /* Readers */

An idea transformer has a 275-turn primary and 825-turn secondary. The primary is connected to a 200-V, 60-Hz source. The secondary supplies a load of 5 A at a lagging power factor of 0.5. Find the turns-ratio, the current in the primary, the power supplied to the load, and the flux in the core.

===Solution===
(A) <math>\ {turns-ratio}=\frac{N_{1}}{N_{2}}</math>
<math>\ =\frac{275}{825}</math>
<math>\ =0.333</math>

(B) Because <math>\ {I_{2}}=5 A</math>, the current in the primary is...

<math>\ {I_{1}}=\frac{I_{2}}{turns-ratio}</math>
<math>\ =\frac{5}{0.333}</math>
<math>\ =15 A</math>

(C) <math>\ {V_{2}}=\frac{V_{1}}{turns-ratio}</math>
<math>\ =\frac{200}{0.333}</math>
<math>\ =600 V</math>

Therefore, the power supplied to the load is...

<math>\ {P_{L}}=V_{2} I_{2}\cos(\theta)</math>
<math>\ =600 * 5 * 0.5</math>
<math>\ =1500 W</math>

(D) <math>\ {\phi_{m}}=\frac{E_{1}}{4.44 f N_{1}}</math>
<math>\ =\frac{V_{1}}{4.44 f N_{1}}</math>
<math>\ =\frac{200}{4.44 * 60 * 275}</math>
<math>\ =2.73 mWb</math>

==Author==
[[Kyle Lafferty]]

==Reviewers==
Aric Vyhmeister

Erik Biesenthal

==Readers==
Aric Vyhmeister

Erik Biesenthal

John Hawkins

Tyler Anderson

==Comments==

The way to do capital phi, <math>\ \Phi</math>, for the flux is to capitalize the first letter of the word, i.e. \Phi instead of \phi. And if you want a space between the number and the units, space is \(space), as in "\ ".

Example: Ampere's Law

2010-01-19T03:43:14Z

Tyler.anderson: /* Solution */

===Problem Statement===
Consider a toroid which has N = 50 turns. The toroid has an ID = 10cm and OD = 15cm. For a current i = 5A calculate the field intensity H along the mean path length within the toroid.
(this problem is similar to Example 5-1 in the text book)

===Solution===

The magnetic field intensity Hm is constant along the circular contour because of symmetry.

The mean path length is <math>r_m=\frac{1}{2}*(\frac{OD+ID}{2})</math>

The mean path length is <math>L_m = 2*\pi*r_m = 2\pi*6.25\approx .393m</math>

The mean path length encloses the current i N-times.[[Image:Toroidish.JPG|thumb|widthpx| ]]

From Eq. 5-1 <math>H_m = \frac{N*i}{L_m} = \frac{50*5}{.393}\approx 636</math>

One can assume a uniform Hm throughout the cross-section of the toroid because the width is smaller than the mean radius.

===Author===
Tyler Anderson

===Reviewers===

===Readers===

Example: Ampere's Law

2010-01-19T03:42:57Z

Tyler.anderson: /* Solution */

===Problem Statement===
Consider a toroid which has N = 50 turns. The toroid has an ID = 10cm and OD = 15cm. For a current i = 5A calculate the field intensity H along the mean path length within the toroid.
(this problem is similar to Example 5-1 in the text book)

===Solution===

The magnetic field intensity Hm is constant along the circular contour because of symmetry.

The mean path length is <math>r_m=\frac{1}{2}*(\frac{OD+ID}{2})</math>

The mean path length is <math>L_m = 2*\pi*r_m = 2\pi*6.25\approx .393m</math>

The mean path length encloses the current i N-times.[[Image:toroidish.jpg|thumb|widthpx| ]]

From Eq. 5-1 <math>H_m = \frac{N*i}{L_m} = \frac{50*5}{.393}\approx 636</math>

One can assume a uniform Hm throughout the cross-section of the toroid because the width is smaller than the mean radius.

===Author===
Tyler Anderson

===Reviewers===

===Readers===

Example: Ampere's Law

2010-01-19T03:42:48Z

Tyler.anderson: /* Solution */

===Problem Statement===
Consider a toroid which has N = 50 turns. The toroid has an ID = 10cm and OD = 15cm. For a current i = 5A calculate the field intensity H along the mean path length within the toroid.
(this problem is similar to Example 5-1 in the text book)

===Solution===

The magnetic field intensity Hm is constant along the circular contour because of symmetry.

The mean path length is <math>r_m=\frac{1}{2}*(\frac{OD+ID}{2})</math>

The mean path length is <math>L_m = 2*\pi*r_m = 2\pi*6.25\approx .393m</math>

The mean path length encloses the current i N-times.[[Image:toroidish|thumb|widthpx| ]]

From Eq. 5-1 <math>H_m = \frac{N*i}{L_m} = \frac{50*5}{.393}\approx 636</math>

One can assume a uniform Hm throughout the cross-section of the toroid because the width is smaller than the mean radius.

===Author===
Tyler Anderson

===Reviewers===

===Readers===

File:Toroidish.JPG

2010-01-19T03:42:32Z

Tyler.anderson: taken with my camera, no from internets.

taken with my camera, no from internets.

Example: Ampere's Law

2010-01-19T03:35:57Z

Tyler.anderson: /* Solution */

===Problem Statement===
Consider a toroid which has N = 50 turns. The toroid has an ID = 10cm and OD = 15cm. For a current i = 5A calculate the field intensity H along the mean path length within the toroid.
(this problem is similar to Example 5-1 in the text book)

===Solution===

The magnetic field intensity Hm is constant along the circular contour because of symmetry.

The mean path length is <math>r_m=\frac{1}{2}*(\frac{OD+ID}{2})</math>

The mean path length is <math>L_m = 2*\pi*r_m = 2\pi*6.25\approx .393m</math>

From Eq. 5-1 <math>H_m = \frac{N*i}{L_m} = \frac{50*5}{.393}\approx 636</math>

One can assume a uniform Hm throughout the cross-section of the toroid because the width is smaller than the mean radius.

===Author===
Tyler Anderson

===Reviewers===

===Readers===

Example: Ampere's Law

2010-01-19T03:34:26Z

Tyler.anderson:

===Problem Statement===
Consider a toroid which has N = 50 turns. The toroid has an ID = 10cm and OD = 15cm. For a current i = 5A calculate the field intensity H along the mean path length within the toroid.
(this problem is similar to Example 5-1 in the text book)

===Solution===

The magnetic field intensity Hm is constant along the circular contour because of symmetry.

The mean path length is <math>r_m=\frac{1}{2}*(\frac{OD+ID}{2})</math>

The mean path length is <math>L_m = 2*\pi*r_m = 2\pi*6.25\approx .393m</math>

From Eq. 5-1 <math>H_m = \frac{N*i}{L_m} = \frac{50*5}{.393}\approx 636</math>

===Author===
Tyler Anderson

===Reviewers===

===Readers===

Example: Ampere's Law

2010-01-19T03:28:56Z

Tyler.anderson: New page: ===Problem Statement=== Consider a toroid which has N = 50 turns. The toroid has an ID = 10cm and OD = 15cm. For a current i = 5A calculate the field intensity H along the mean path lengt...

Electromechanical Energy Conversion

2010-01-19T03:19:09Z

Tyler.anderson: /* Draft Articles */

[[Rules]]

[[Class Roster]]

[[Points]]

==Questions==

What do we do when we are finished with the draft and ready to publish?
* If it's been approved by the reviewers, move it to the articles section

Does anyone know why my LaTEX stuff is changing sizes throughout my article? [[An Ideal Transformer Example]]

*(John Hawkins) As I understand it, the text is made full size (larger) if there is ever a function call, i.e. something starting with a backslash, excluding some things like greek letters. I have just put "\ " (the function call for a space) at the beginning of an equation and had it work. If you don't want to change anything about your equation but just want it displayed full size, type "\,\!" (small forward space and small backward space) somewhere in your equation.
*Thanks John!

==Announcements==

If anyone wants to write the derivation of Ampere's Law you can put it on my (Wesley Brown) [[Ampere's Law]] page and be a co-author.

==Draft Articles==
These articles are not ready for reading and error checking. They are listed so people will not simultaneously write about similar topics.
* [[Ferromagnetism]]
* [[Magnetic Circuits]]
* [[Example: Ampere's Law]] (Tyler Anderson)
* [[Ampere's Law]]
* [[DC Motor]]
* [[AC vs. DC]]
* [[Fringing]]
* [[Electrostatics]]
* [[Faraday's Law]]
* [[Eddy Current]]
* [[Example Problems of Magnetic Circuits]]
* [[Magnetic Circuit]] (John Hawkins)
* [[Ohm's Law and Reluctance]]
* [[Magnetic Flux]]
* [[An Ideal Transformer Example]]
* [[Example: Ideal Transformer Exercise]] (John Hawkins)
* [[Reference Terms and Units]] (Amy Crosby)
* [[Transformer_example_problem|Ideal Transformer Example]]

==Reviewed Articles==
These articles have been reviewed and submitted.
* [[Gauss Meters]] (Tyler Anderson)
* [[Nick_ENGR431_P1|Magnetostatics]] (Nick Christman)
* [[Magnetic Flux]] (Jason Osborne)
*[[An Application of Electromechanical Energy Conversion: Hybrid Electric Vehicles]] (Chris Lau)
* [[AC Motors]]

Electromechanical Energy Conversion

2010-01-19T03:13:53Z

Tyler.anderson:

[[Rules]]

[[Class Roster]]

[[Points]]

==Questions==

What do we do when we are finished with the draft and ready to publish?
* If it's been approved by the reviewers, move it to the articles section

Does anyone know why my LaTEX stuff is changing sizes throughout my article? [[An Ideal Transformer Example]]

*(John Hawkins) As I understand it, the text is made full size (larger) if there is ever a function call, i.e. something starting with a backslash, excluding some things like greek letters. I have just put "\ " (the function call for a space) at the beginning of an equation and had it work. If you don't want to change anything about your equation but just want it displayed full size, type "\,\!" (small forward space and small backward space) somewhere in your equation.
*Thanks John!

==Announcements==

If anyone wants to write the derivation of Ampere's Law you can put it on my (Wesley Brown) [[Ampere's Law]] page and be a co-author.

==Draft Articles==
These articles are not ready for reading and error checking. They are listed so people will not simultaneously write about similar topics.
* [[Ferromagnetism]]
* [[Magnetic Circuits]]

* [[Ampere's Law]]
* [[DC Motor]]
* [[AC vs. DC]]
* [[Fringing]]
* [[Electrostatics]]
* [[Faraday's Law]]
* [[Eddy Current]]
* [[Example Problems of Magnetic Circuits]]
* [[Magnetic Circuit]] (John Hawkins)
* [[Ohm's Law and Reluctance]]
* [[Magnetic Flux]]
* [[An Ideal Transformer Example]]
* [[Example: Ideal Transformer Exercise]] (John Hawkins)
* [[Reference Terms and Units]] (Amy Crosby)
* [[Transformer_example_problem|Ideal Transformer Example]]

==Reviewed Articles==
These articles have been reviewed and submitted.
* [[Gauss Meters]] (Tyler Anderson)
* [[Nick_ENGR431_P1|Magnetostatics]] (Nick Christman)
* [[Magnetic Flux]] (Jason Osborne)
*[[An Application of Electromechanical Energy Conversion: Hybrid Electric Vehicles]] (Chris Lau)
* [[AC Motors]]

Example: Ideal Transformer Exercise

2010-01-19T03:08:47Z

Tyler.anderson: /* Reviewed By */

==Author==

John Hawkins

==Problem Statement==

An ideal transformer has a primary winding with 500 turns and a secondary winding with 2000 turns. Given that <math>\ e_1=120\angle{0^\circ}\text{ V, RMS}</math> and <math>\ i_1=(2+3j)\text{ A}</math>, find the load impedance, <math>\ Z_L</math> and the Thevenin equivalent, <math>\ Z_{th}</math>.

==Solution==

We could find the Thevenin impedance directly, but we will save that until the end as a checking mechanism. First, we will find the actual load impedance by finding the current and voltage in the secondary winding and finding their ratio. The equations used are those derived in class by Professor Frohne.

<center>

<math>e_2=\frac{N_2}{N_2}e_1=\frac{2000}{500}(120)=480\text{ V}</math>

 

<math>i_2=\frac{N_1}{N_2}i_1=\frac{500}{2000}(2+3j)=\left(\frac{1}{2}+\frac{3}{4}j\right)\text{ A}</math>

 

<math>Z_L=\frac{e_2}{i_2}=\frac{480}{\frac{1}{2}+\frac{3}{4}j}=\mathbf{(295.4-443.1j)\ \Omega\ =(532.5\angle{-56.3^\circ})\ \Omega}</math>

 

<math>Z_{th}=\left(\frac{N_1}{N_2}\right)^2Z_L=\left(\frac{500}{2000}\right)^2(295.4-443.1j)=\mathbf{(18.5-27.7j)\ \Omega\ =(33.3\angle{-56.3^\circ})\ \Omega}</math>

</center>

 

As mentioned at the beginning, this should be the impedance found using the ratio of the primary voltage and current. Using this method, we find that

 

<center>

<math>Z_{th}=\frac{e_1}{i_1}=\frac{120}{2+3j}=\mathbf{(18.5-27.7j)\ \Omega\ =(33.3\angle{-56.3^\circ})\ \Omega}</math>

</center>

 

This is the same answer as above, which verifies the solutions.

==Reviewed By==

Tyler Anderson - it may be helpful to the readers if you referenced what equations you are using. For example:
<math>e_2=\frac{N_2}{N_2}e_1</math> <math> EQ (5-39)</math>
Otherwise it looks sound to me.

* I didn't use the textbook, so such a reference is not required. I agree that it would be useful for those in the class, but I don't have the same textbook as everyone else, and I doubt anyone would care to know my book's equation numbers. Thanks for reminding me about references, though. I mentioned the class derivation above in the text.
* haha fair enough then. props for that. perhaps I could barrow your book sometime? cause ours is absolute crap.

==Read By==

Gauss Meters

2010-01-18T03:33:40Z

Tyler.anderson:

===Gauss===

'What is a Gauss Meter?' one may ask. Well in order to define that one must look at the unit of Gauss. A Gauss is a common unit of measurement of magnetic field strength named after the seemingly self absorbed German mathematician and physicist Johann Carl Friedrich Gauss. The unit of guass is equal to one maxwell per square centimeter. According to the alternative centimetre gram second system of units (cgs), the gauss is the unit of magnetic field '''B''', while the oersted is the unit of magnetizing field '''H'''. One tesla is equal to 104 gauss, and one ampere per meter is equal to 4π × 10−3 oersted

<math>1G = \frac {Mx}{cm^2}</math>

===The meter===
[[Image:gaussmeter.jpg|thumb|widthpx| ]]
The Gauss meter obviously measures the Gauss value. Meters vary in the strength of magnetic fields they are able to measure. For example, high performance hand held Gauss Meters can measurements from 0 to 30 kG with a basic accuracy of 1%. To give you an idea what that’s like: in a gap configuration, the strongest rare-earth magnets (that being the Neodymium magnets) have a field strength of up to 14 kG; that being 7kG on each magnet face.

The Gauss meter works by reading a current that is induced by a magnetic field that is radiated through a coil of thin wires which is inside device. The circuitry inside the Gauss meter amplifies the induced current, thus enabling it to measure as low as 0.1 mg. There are two configurations that are available on the market; single axis coil or a triple axis coil. The single axis are simpler and thus less expensive. However, the more complicated triple axis meters produce more accurate results.

Many Gauss meters come with standard features including auto zero, peak hold, max/min hold, auto range, alarm, memory hold, and relative mode. The probes also come in two fashions: transverse and axial. The transverse probe measures magnetic fields perpendicular to the probe axis. The axial probe has the Hall sensor mounted perpendicular to the probe axis and measures magnetic fields parallel to the probe axis.

===Citations===

http://www.naturalnews.com/023078.html

http://www.experts123.com/q/what-is-a-gauss-meter.html

http://www.gap-system.org/~history/Biographies/Gauss.html

http://www.omega.com/ppt/pptsc.asp?ref=HHG-20&nav=HEAQ05

http://www.lakeshore.com/mag/ga/gm410m.html

http://www.trifield.com/gauss_meter.htm

===Author===
Tyler Anderson
===Reviewers===

===Readers===

Example: Ideal Transformer Exercise

2010-01-18T03:23:14Z

Tyler.anderson:

==Author==

John Hawkins

==Problem Statement==

An ideal transformer has a primary winding with 500 turns and a secondary winding with 2000 turns. Given that <math>\ e_1=120\angle{0^\circ}\text{ V, RMS}</math> and <math>\ i_1=(2+3j)\text{ A}</math>, find the load impedance, <math>\ Z_L</math> and the Thevenin equivalent, <math>\ Z_{th}</math>.

==Solution==

We could find the Thevenin impedance directly, but we will save that until the end as a checking mechanism. First, we will find the actual load impedance by finding the current and voltage in the secondary winding and finding their ratio.

<center>

<math>e_2=\frac{N_2}{N_2}e_1=\frac{2000}{500}(120)=480\text{ V}</math>

 

<math>i_2=\frac{N_1}{N_2}i_1=\frac{500}{2000}(2+3j)=\left(\frac{1}{2}+\frac{3}{4}j\right)\text{ A}</math>

 

<math>Z_L=\frac{e_2}{i_2}=\frac{480}{\frac{1}{2}+\frac{3}{4}j}=\mathbf{(295.4-443.1j)\ \Omega\ =(532.5\angle{-56.3^\circ})\ \Omega}</math>

 

<math>Z_{th}=\left(\frac{N_1}{N_2}\right)^2Z_L=\left(\frac{500}{2000}\right)^2(295.4-443.1j)=\mathbf{(18.5-27.7j)\ \Omega\ =(33.3\angle{-56.3^\circ})\ \Omega}</math>

</center>

 

As mentioned at the beginning, this should be the impedance found using the ratio of the primary voltage and current. Using this method, we find that

 

<center>

<math>Z_{th}=\frac{e_1}{i_1}=\frac{120}{2+3j}=\mathbf{(18.5-27.7j)\ \Omega\ =(33.3\angle{-56.3^\circ})\ \Omega}</math>

</center>

 

This is the same answer as above, which verifies the solutions.

==Reviewed By==

Tyler Anderson - it may be helpful to the readers if you referenced what equations you are using. For example:
<math>e_2=\frac{N_2}{N_2}e_1</math> <math> EQ (5-39)</math>
Otherwise it looks sound to me.

==Read By==

Example: Ideal Transformer Exercise

2010-01-18T03:18:58Z

Tyler.anderson:

==Author==

John Hawkins

==Problem Statement==

An ideal transformer has a primary winding with 500 turns and a secondary winding with 2000 turns. Given that <math>\ e_1=120\angle{0^\circ}\text{ V, RMS}</math> and <math>\ i_1=(2+3j)\text{ A}</math>, find the load impedance, <math>\ Z_L</math> and the Thevenin equivalent, <math>\ Z_{th}</math>.

==Solution==

We could find the Thevenin impedance directly, but we will save that until the end as a checking mechanism. First, we will find the actual load impedance by finding the current and voltage in the secondary winding and finding their ratio.

<center>

<math>e_2=\frac{N_2}{N_2}e_1=\frac{2000}{500}(120)=480\text{ V}</math>

 

<math>i_2=\frac{N_1}{N_2}i_1=\frac{500}{2000}(2+3j)=\left(\frac{1}{2}+\frac{3}{4}j\right)\text{ A}</math>

 

<math>Z_L=\frac{e_2}{i_2}=\frac{480}{\frac{1}{2}+\frac{3}{4}j}=\mathbf{(295.4-443.1j)\ \Omega\ =(532.5\angle{-56.3^\circ})\ \Omega}</math>

 

<math>Z_{th}=\left(\frac{N_1}{N_2}\right)^2Z_L=\left(\frac{500}{2000}\right)^2(295.4-443.1j)=\mathbf{(18.5-27.7j)\ \Omega\ =(33.3\angle{-56.3^\circ})\ \Omega}</math>

</center>

 

As mentioned at the beginning, this should be the impedance found using the ratio of the primary voltage and current. Using this method, we find that

 

<center>

<math>Z_{th}=\frac{e_1}{i_1}=\frac{120}{2+3j}=\mathbf{(18.5-27.7j)\ \Omega\ =(33.3\angle{-56.3^\circ})\ \Omega}</math>

</center>

 

This is the same answer as above, which verifies the solutions.

==Reviewed By==

Tyler Anderson - it may be helpful to reference what equations you are using. For example:
<math>e_2=\frac{N_2}{N_2}e_1=\frac{2000}{500}(120)=480\text{ V}</math> Equation (5-39)

==Read By==

Example: Ideal Transformer Exercise

2010-01-18T03:18:22Z

Tyler.anderson: /* Reviewed By */

==Author==

John Hawkins

==Problem Statement==

An ideal transformer has a primary winding with 500 turns and a secondary winding with 2000 turns. Given that <math>\ e_1=120\angle{0^\circ}\text{ V, RMS}</math> and <math>\ i_1=(2+3j)\text{ A}</math>, find the load impedance, <math>\ Z_L</math> and the Thevenin equivalent, <math>\ Z_{th}</math>.

==Solution==

We could find the Thevenin impedance directly, but we will save that until the end as a checking mechanism. First, we will find the actual load impedance by finding the current and voltage in the secondary winding and finding their ratio.

<center>

<math>e_2=\frac{N_2}{N_2}e_1=\frac{2000}{500}(120)=480\text{ V}</math>

 

<math>i_2=\frac{N_1}{N_2}i_1=\frac{500}{2000}(2+3j)=\left(\frac{1}{2}+\frac{3}{4}j\right)\text{ A}</math>

 

<math>Z_L=\frac{e_2}{i_2}=\frac{480}{\frac{1}{2}+\frac{3}{4}j}=\mathbf{(295.4-443.1j)\ \Omega\ =(532.5\angle{-56.3^\circ})\ \Omega}</math>

 

<math>Z_{th}=\left(\frac{N_1}{N_2}\right)^2Z_L=\left(\frac{500}{2000}\right)^2(295.4-443.1j)=\mathbf{(18.5-27.7j)\ \Omega\ =(33.3\angle{-56.3^\circ})\ \Omega}</math>

</center>

 

As mentioned at the beginning, this should be the impedance found using the ratio of the primary voltage and current. Using this method, we find that

 

<center>

<math>Z_{th}=\frac{e_1}{i_1}=\frac{120}{2+3j}=\mathbf{(18.5-27.7j)\ \Omega\ =(33.3\angle{-56.3^\circ})\ \Omega}</math>

</center>

 

This is the same answer as above, which verifies the solutions.

==Reviewed By==

Tyler Anderson - it may be helpful to reference what equations you are using. For example:

==Read By==

Gauss Meters

2010-01-17T17:36:17Z

Tyler.anderson: /* The meter */

===Gauss===

'What is a Gauss Meter?' one may ask. Well in order to define that one must look at the unit of Gauss. A Gauss is a common unit of measurement of magnetic field strength named after the seemingly self absorbed German mathematician and physicist Johann Carl Friedrich Gauss. The unit of guass is equal to one maxwell per square centimeter. According to the alternative centimetre gram second system of units (cgs), the gauss is the unit of magnetic field '''B''', while the oersted is the unit of magnetizing field '''H'''. One tesla is equal to 104 gauss, and one ampere per meter is equal to 4π × 10−3 oersted

<math>1G = \frac {Mx}{cm^2}</math>

===The meter===
[[Image:gaussmeter.jpg|thumb|widthpx| ]]
The Gauss meter obviously measures the Gauss value. Meters vary in the strength of magnetic fields they are able to measure. For example, high performance hand held Gauss Meters can measurements from 0 to 30 kG with a basic accuracy of 1%. To give you an idea what that’s like: in a gap configuration, the strongest rare-earth magnets (that being the Neodymium magnets) have a field strength of up to 14 kG; that being 7kG on each magnet face.

The Gauss meter works by reading a current that is induced by a magnetic field that is radiated through a coil of thin wires which is inside device. The circuitry inside the Gauss meter amplifies the induced current, thus enabling it to measure as low as 0.1 mg. There are two configurations that are available on the market; single axis coil or a triple axis coil. The single axis are simpler and thus less expensive. However, the more complicated triple axis meters produce more accurate results.

Many Gauss meters come with standard features including auto zero, peak hold, max/min hold, auto range, alarm, memory hold, and relative mode. The probes also come in two fashions: transverse and axial. The transverse probe measures magnetic fields perpendicular to the probe axis. The axial probe has the Hall sensor mounted perpendicular to the probe axis and measures magnetic fields parallel to the probe axis.

===Citations===

http://www.naturalnews.com/023078.html

http://www.experts123.com/q/what-is-a-gauss-meter.html

http://www.gap-system.org/~ Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 history/Biographies/Gauss.html

http://www.omega.com/ppt/pptsc.asp?ref=HHG-20&nav=HEAQ05

http://www.lakeshore.com/mag/ga/gm410m.html

http://www.trifield.com/gauss_meter.htm

File:Gaussmeter.jpg

2010-01-17T17:35:40Z

Tyler.anderson: taken with my phone, in the emec lab. not from internets.

taken with my phone, in the emec lab. not from internets.

Electromechanical Energy Conversion

2010-01-11T02:50:17Z

Tyler.anderson: /* Questions */

[[Rules]]

[[Class Roster]]

[[Points]]

==Articles==
None published to date

==Questions==

What do we do when we are finished with the draft and ready to publish?

==Draft Articles==
These articles are not ready for reading and error checking. They are listed so people will not simultaneously write about similar topics.
* [[Ferromagnetism]]
* [[Magnetic Circuits]]
* [[Gauss Meters]]
* [[Ampere's Law]]
* [[DC Motor]]
* [[AC vs. DC]]
* [[An Application of Electromechanical Energy Conversion: Hybrid Electric Vehicles]]
* [[AC Motors]]
* [[Fringing]]
* [[Nick_ENGR431_P1|Magnetostatics]]
* [[Example problems of magnetic circuits]]

Electromechanical Energy Conversion

2010-01-11T02:49:47Z

Tyler.anderson: /* Articles */

[[Rules]]

[[Class Roster]]

[[Points]]

==Articles==
None published to date

==Questions==

==Draft Articles==
These articles are not ready for reading and error checking. They are listed so people will not simultaneously write about similar topics.
* [[Ferromagnetism]]
* [[Magnetic Circuits]]
* [[Gauss Meters]]
* [[Ampere's Law]]
* [[DC Motor]]
* [[AC vs. DC]]
* [[An Application of Electromechanical Energy Conversion: Hybrid Electric Vehicles]]
* [[AC Motors]]
* [[Fringing]]
* [[Nick_ENGR431_P1|Magnetostatics]]
* [[Example problems of magnetic circuits]]

Gauss Meters

2010-01-11T02:46:19Z

Tyler.anderson: /* The meter */

===Gauss===

'What is a Gauss Meter?' one may ask. Well in order to define that one must look at the unit of Gauss. A Gauss is a common unit of measurement of magnetic field strength named after the seemingly self absorbed German mathematician and physicist Johann Carl Friedrich Gauss. The unit of guass is equal to one maxwell per square centimeter. According to the alternative centimetre gram second system of units (cgs), the gauss is the unit of magnetic field '''B''', while the oersted is the unit of magnetizing field '''H'''. One tesla is equal to 104 gauss, and one ampere per meter is equal to 4π × 10−3 oersted

<math>1G = \frac {Mx}{cm^2}</math>

===The meter===

The Gauss meter obviously measures the Gauss value. Meters vary in the strength of magnetic fields they are able to measure. For example, high performance hand held Gauss Meters can measurements from 0 to 30 kG with a basic accuracy of 1%. To give you an idea what that’s like: in a gap configuration, the strongest rare-earth magnets (that being the Neodymium magnets) have a field strength of up to 14 kG; that being 7kG on each magnet face.

The Gauss meter works by reading a current that is induced by a magnetic field that is radiated through a coil of thin wires which is inside device. The circuitry inside the Gauss meter amplifies the induced current, thus enabling it to measure as low as 0.1 mg. There are two configurations that are available on the market; single axis coil or a triple axis coil. The single axis are simpler and thus less expensive. However, the more complicated triple axis meters produce more accurate results.

Many Gauss meters come with standard features including auto zero, peak hold, max/min hold, auto range, alarm, memory hold, and relative mode. The probes also come in two fashions: transverse and axial. The transverse probe measures magnetic fields perpendicular to the probe axis. The axial probe has the Hall sensor mounted perpendicular to the probe axis and measures magnetic fields parallel to the probe axis.

===Citations===

http://www.naturalnews.com/023078.html

http://www.experts123.com/q/what-is-a-gauss-meter.html

http://www.gap-system.org/~ Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 history/Biographies/Gauss.html

http://www.omega.com/ppt/pptsc.asp?ref=HHG-20&nav=HEAQ05

http://www.lakeshore.com/mag/ga/gm410m.html

http://www.trifield.com/gauss_meter.htm

Gauss Meters

2010-01-11T02:45:29Z

Tyler.anderson: /* Citations */

===Gauss===

'What is a Gauss Meter?' one may ask. Well in order to define that one must look at the unit of Gauss. A Gauss is a common unit of measurement of magnetic field strength named after the seemingly self absorbed German mathematician and physicist Johann Carl Friedrich Gauss. The unit of guass is equal to one maxwell per square centimeter. According to the alternative centimetre gram second system of units (cgs), the gauss is the unit of magnetic field '''B''', while the oersted is the unit of magnetizing field '''H'''. One tesla is equal to 104 gauss, and one ampere per meter is equal to 4π × 10−3 oersted

<math>1G = \frac {Mx}{cm^2}</math>

===The meter===
Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

The Gauss meter obviously measures the Gauss value. Meters vary in the strength of magnetic fields they are able to measure. For example, high performance hand held Gauss Meters can measurements from 0 to 30 kG with a basic accuracy of 1%. To give you an idea what that’s like: in a gap configuration, the strongest rare-earth magnets (that being the Neodymium magnets) have a field strength of up to 14 kG; that being 7kG on each magnet face.

The Gauss meter works by reading a current that is induced by a magnetic field that is radiated through a coil of thin wires which is inside device. The circuitry inside the Gauss meter amplifies the induced current, thus enabling it to measure as low as 0.1 mg. There are two configurations that are available on the market; single axis coil or a triple axis coil. The single axis are simpler and thus less expensive. However, the more complicated triple axis meters produce more accurate results.

Many Gauss meters come with standard features including auto zero, peak hold, max/min hold, auto range, alarm, memory hold, and relative mode. The probes also come in two fashions: transverse and axial. The transverse probe measures magnetic fields perpendicular to the probe axis. The axial probe has the Hall sensor mounted perpendicular to the probe axis and measures magnetic fields parallel to the probe axis.

===Citations===

http://www.naturalnews.com/023078.html

http://www.experts123.com/q/what-is-a-gauss-meter.html

http://www.gap-system.org/~ Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 history/Biographies/Gauss.html

http://www.omega.com/ppt/pptsc.asp?ref=HHG-20&nav=HEAQ05

http://www.lakeshore.com/mag/ga/gm410m.html

http://www.trifield.com/gauss_meter.htm

Gauss Meters

2010-01-11T02:45:13Z

Tyler.anderson: /* The meter */

===Gauss===

'What is a Gauss Meter?' one may ask. Well in order to define that one must look at the unit of Gauss. A Gauss is a common unit of measurement of magnetic field strength named after the seemingly self absorbed German mathematician and physicist Johann Carl Friedrich Gauss. The unit of guass is equal to one maxwell per square centimeter. According to the alternative centimetre gram second system of units (cgs), the gauss is the unit of magnetic field '''B''', while the oersted is the unit of magnetizing field '''H'''. One tesla is equal to 104 gauss, and one ampere per meter is equal to 4π × 10−3 oersted

<math>1G = \frac {Mx}{cm^2}</math>

===The meter===
Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

The Gauss meter obviously measures the Gauss value. Meters vary in the strength of magnetic fields they are able to measure. For example, high performance hand held Gauss Meters can measurements from 0 to 30 kG with a basic accuracy of 1%. To give you an idea what that’s like: in a gap configuration, the strongest rare-earth magnets (that being the Neodymium magnets) have a field strength of up to 14 kG; that being 7kG on each magnet face.

The Gauss meter works by reading a current that is induced by a magnetic field that is radiated through a coil of thin wires which is inside device. The circuitry inside the Gauss meter amplifies the induced current, thus enabling it to measure as low as 0.1 mg. There are two configurations that are available on the market; single axis coil or a triple axis coil. The single axis are simpler and thus less expensive. However, the more complicated triple axis meters produce more accurate results.

Many Gauss meters come with standard features including auto zero, peak hold, max/min hold, auto range, alarm, memory hold, and relative mode. The probes also come in two fashions: transverse and axial. The transverse probe measures magnetic fields perpendicular to the probe axis. The axial probe has the Hall sensor mounted perpendicular to the probe axis and measures magnetic fields parallel to the probe axis.

===Citations===

http://www.naturalnews.com/023078.html

http://www.experts123.com/q/what-is-a-gauss-meter.html

http://www.gap-system.org/~history/Biographies/Gauss.html

Gauss Meters

2010-01-10T04:21:28Z

Tyler.anderson: /* The meter */

Points

2010-01-08T01:34:46Z

Tyler.anderson: /* Who's article is it anyways: Where everything is made up and the points don't matter! */

==Points earned==
===Who's article is it anyways: Where everything is made up and the points don't matter!===
(If you missed the joke you are required to go watch Who's line is it anyways right now!)

1. Lau, Chris - 67/6 points

2. Anderson, Tyler - <math>\infin + 1</math>

3. Sell, Andrew − QZǼMΩ

4. Griffith, Will - <math>\infin * i</math>

Andrew Sell

2010-01-08T01:33:14Z

Tyler.anderson: /* Joking Aside */

'''Contact Information'''

andrew.sell@wallawalla.edu

509-301-9002

=Electro-Mechanical Energy Conversion=

=== A Deffiniton of Matrix Multiplication (this is just a test...) ===
Basically...
:<math>A \in {\mathbb R}^{m \times n}</math>, <math>B \in {\mathbb R}^{n \times p}</math>
Turns into...
:<math> (AB) \in {\mathbb R}^{m \times p} </math>
Where <math>AB</math> are magically
:<math> (AB)_{i,j} = \sum_{r=1}^n A_{i,r}B_{r,j}</math>

Make sense?...

== Joking Aside ==

Does anyone know whats going on?

NOPE!-TA

No! And why the duce does it keep logging me out!-Will

lol

so do we get points for randomly writing on your page? if so im going to start a journal/blog on here or something.

I'd be game for it....tell me a story

so this one time, this engineer was really lonely. he then started talking to himself on his own wiki page.

==Published Articles==

==Articles Under Construction==
[[Magnetic Circuits]]

==Reviewed Articles==

Andrew Sell

2010-01-08T01:13:31Z

Tyler.anderson: /* Joking Aside */

Electromechanical Energy Conversion

2010-01-08T01:10:46Z

Tyler.anderson: /* Draft Articles */

[[Rules]]

[[Class Roster]]

[[Points]]

==Articles==
None published to date

==Draft Articles==
These articles are not ready for reading and error checking. They are listed so people will not simultaneously write about similar topics.
* [[Ferromagnetism]]
* [[Magnetic Circuits]]
* [[Gauss Meters]]

Electromechanical Energy Conversion

2010-01-08T00:36:01Z

Tyler.anderson: /* Who's article is it anyways: Where everything is made up and the points don't matter! */

==Class 2010==
#[[Eric Clay]]
#[[Jason Osborne]]
#Tim Van Arsdale
#Kirk Betz
#Corneliu Turturica
#Jimmy Apablaza
#[[Will Griffith]]
#[[Greg Fong]]
#[[Tyler Anderson]]
#[[Andrew Sell]]
#[[Lau, Chris]]
#Kyle Lafferty
#[[Matthew Fetke]]
#Wesley Brown
#[[Erik Biesenthal]]
#[[Jodi Hodge]]
#[[David Robbins]]
#[[Amy Crosby]]
#[[Tim Rasmussen]]
#[[Kevin Starkey EMEC]]
#[[John Hawkins]]
#[[Alex Roddy]]

===Links===
[[Rules]]
[[Class Roster]]

==Articles==
None published to date
==Points earned==
===Who's article is it anyways: Where everything is made up and the points don't matter!===
(If you missed the joke you are required to go watch Who's line is it anyways right now!)

1. Lau, Chris - 67/6 points

2. Anderson, Tyler - <math>\infin + 1</math>

3. Sell, Andrew - QZǼMΩ

==Draft Articles==
These articles are not ready for reading and error checking. They are listed so people will not simultaneously write about similar topics.
* [[Ferromagnetism]]
* [[Magnetic Circuits]]

Electromechanical Energy Conversion

2010-01-08T00:34:24Z

Tyler.anderson: /* Who's article is it anyways: Where everything is made up and the points don't matter! */

==Class 2010==
#[[Eric Clay]]
#[[Jason Osborne]]
#Tim Van Arsdale
#Kirk Betz
#Corneliu Turturica
#Jimmy Apablaza
#[[Will Griffith]]
#[[Greg Fong]]
#[[Tyler Anderson]]
#[[Andrew Sell]]
#[[Lau, Chris]]
#Kyle Lafferty
#[[Matthew Fetke]]
#Wesley Brown
#[[Erik Biesenthal]]
#[[Jodi Hodge]]
#[[David Robbins]]
#[[Amy Crosby]]
#[[Tim Rasmussen]]
#[[Kevin Starkey EMEC]]
#[[John Hawkins]]
#[[Alex Roddy]]

===Links===
[[Rules]]

==Articles==
None published to date
==Points earned==
===Who's article is it anyways: Where everything is made up and the points don't matter!===
(If you missed the joke you are required to go watch Who's line is it anyways right now!)

1. Lau, Chris - 67/6 points

2. Anderson, Tyler - <math>\infin + 1</math>

==Draft Articles==
These articles are not ready for reading and error checking. They are listed so people will not simultaneously write about similar topics.
* [[Ferromagnetism]]
* [[Magnetic Circuits]]

Electromechanical Energy Conversion

2010-01-08T00:34:04Z

Tyler.anderson: /* Who's article is it anyways: Where everything is made up and the points don't matter! */

==Class 2010==
#[[Eric Clay]]
#[[Jason Osborne]]
#Tim Van Arsdale
#Kirk Betz
#Corneliu Turturica
#Jimmy Apablaza
#[[Will Griffith]]
#[[Greg Fong]]
#[[Tyler Anderson]]
#[[Andrew Sell]]
#[[Lau, Chris]]
#Kyle Lafferty
#[[Matthew Fetke]]
#Wesley Brown
#[[Erik Biesenthal]]
#[[Jodi Hodge]]
#[[David Robbins]]
#[[Amy Crosby]]
#[[Tim Rasmussen]]
#[[Kevin Starkey EMEC]]
#[[John Hawkins]]
#[[Alex Roddy]]

===Links===
[[Rules]]

==Articles==
None published to date
==Points earned==
===Who's article is it anyways: Where everything is made up and the points don't matter!===
(If you missed the joke you are required to go watch Who's line is it anyways right now!)

1. Lau, Chris - 67/6 points
2. Anderson, Tyler - \infin + 1

==Draft Articles==
These articles are not ready for reading and error checking. They are listed so people will not simultaneously write about similar topics.
* [[Ferromagnetism]]
* [[Magnetic Circuits]]

Andrew Sell

2010-01-07T23:42:08Z

Tyler.anderson: /* Joking Aside */

=== A Deffiniton of Matrix Multiplication ===
Basically...
:<math>A \in {\mathbb R}^{m \times n}</math>, <math>B \in {\mathbb R}^{n \times p}</math>
Turns into...
:<math> (AB) \in {\mathbb R}^{m \times p} </math>
Where <math>AB</math> are magically
:<math> (AB)_{i,j} = \sum_{r=1}^n A_{i,r}B_{r,j}</math>

Make sense?...

== Joking Aside ==

Does anyone know whats going on?

NOPE!-TA

===Electro-Mechanical Energy Conversion===
No published works to date, nope, none.

Tyler Anderson

2010-01-07T23:39:26Z

Tyler.anderson: /* Please add stuff here */

==Contact Info==
tyler.anderson@wallawalla.edu
:707.972.0084

==Articles==
:[[Gauss Meters]]

==Randomness==
====Please add stuff here====
[[Image:I8xUS.jpg|thumb|widthpx| ]]
this is a test
:<math>\int \limits_{-\infin}^{\infin}\frac{1}{1+x^2},dx</math>
which equals
:<math>\pi</math>
does any one know how to start a new line without having to indent?

===Tyler Anderson is Awesome!===

File:I8xUS.jpg

2010-01-07T23:38:46Z

Tyler.anderson: source: unknown but I thought it was awesome.

source: unknown
but I thought it was awesome.

Gauss Meters

2010-01-07T23:28:52Z

Tyler.anderson: /* Gauss */

Gauss Meters

2010-01-07T23:28:29Z

Tyler.anderson: /* The meter */

File:Gaussmeter2.jpg

2010-01-07T23:27:47Z

Tyler.anderson: source: http://www.rubber-magnet.com/permanent-magnet/image/Gaussmeter-610S-b.jpg

source: http://www.rubber-magnet.com/permanent-magnet/image/Gaussmeter-610S-b.jpg

Gauss Meters

2010-01-07T20:59:34Z

Tyler.anderson:

Gauss Meters

2010-01-07T20:59:15Z

Tyler.anderson: