Magnetic Circuits - Revision history

Andrew.Sell at 01:26, 21 January 2010

2010-01-21T01:26:33Z

← Older revision		Revision as of 18:26, 20 January 2010
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	==Reluctance==		==Reluctance==
	Reluctance can be ~~definec~~ as the opposition in a magnetic circuit to magnetic flux. It is the ratio of the magnetic potential difference to the corresponding magnetic flux.<ref>[http://www.merriam-webster.com/dictionary/RELUCTANCE Merrian-Webster: Reluctance]</ref>In a electrical circuit we have resistance, where as in a magnetic circuit, we have reluctance. Similarly where we have Ohm's law in an electrical circuit, where it states that:		Reluctance can be defined as the opposition in a magnetic circuit to magnetic flux. It is the ratio of the magnetic potential difference to the corresponding magnetic flux.<ref>[http://www.merriam-webster.com/dictionary/RELUCTANCE Merrian-Webster: Reluctance]</ref>In a electrical circuit we have resistance, where as in a magnetic circuit, we have reluctance. Similarly where we have Ohm's law in an electrical circuit, where it states that:

	<math>\Omega = \frac{V}{I}</math>		<math>\Omega = \frac{V}{I}</math>

Andrew.Sell: /* Magnetic Flux */

2010-01-21T01:25:56Z

Magnetic Flux

← Older revision		Revision as of 18:25, 20 January 2010
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	==Magnetic Flux==		==Magnetic Flux==
	see [Magnetic Flux]		see [[Magnetic Flux]]
	====References====		====References====
	<references/>		<references/>

Andrew.Sell: /* Magnetic Flux */

2010-01-21T01:25:46Z

Magnetic Flux

← Older revision		Revision as of 18:25, 20 January 2010
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	==Magnetic Flux==		==Magnetic Flux==
	~~(Under Construction...)~~		see [Magnetic Flux]

	====References====		====References====
	<references/>		<references/>

Andrew.Sell: /* Magnetomotive Force */

2010-01-11T01:11:32Z

Magnetomotive Force

← Older revision		Revision as of 18:11, 10 January 2010
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	Magnetomotive force is also dependent on a given cores' permeability, in that a core whose permeability is very low, will not be able carry the force very well.		Magnetomotive force is also dependent on a given cores' permeability, in that a core whose permeability is very low, will not be able to carry the force very well.

Andrew.Sell: /* Reluctance */

2010-01-11T01:09:55Z

Reluctance

← Older revision		Revision as of 18:09, 10 January 2010
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	Where <math>\mathcal{R}</math> is reluctance, <math>\mathcal{F}</math> is magnetomotive force, and <math>{\Phi}</math> is the magnetic flux. Reluctance acts the same way as resistance in a wire. Being that as the cross-sectional area of the reluctance decreases, and if the length of the magnetic material increases the reluctance increases.<ref>[http://sci-toys.com/scitoys/scitoys/magnets/calculating/calculating.html Sci-Toys.com: Magnetism]</ref>		Where <math>\mathcal{R}</math> is reluctance, <math>\mathcal{F}</math> is magnetomotive force, and <math>{\Phi}</math> is the magnetic flux. Reluctance acts the same way as resistance in a wire. Being that as the cross-sectional area of the reluctance decreases, and if the length of the magnetic material increases the reluctance increases.<ref>[http://sci-toys.com/scitoys/scitoys/magnets/calculating/calculating.html Sci-Toys.com: Magnetism]</ref>

	==~~Reluctance~~==		==Magnetic Flux==
	~~Magnetic Flux~~ (Under Construction...)		(Under Construction...)

	====References====		====References====
	<references/>		<references/>

Andrew.Sell at 01:09, 11 January 2010

2010-01-11T01:09:37Z

← Older revision		Revision as of 18:09, 10 January 2010
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	Where <math>\mathcal{R}</math> is reluctance, <math>\mathcal{F}</math> is magnetomotive force, and <math>{\Phi}</math> is the magnetic flux. Reluctance acts the same way as resistance in a wire. Being that as the cross-sectional area of the reluctance decreases, and if the length of the magnetic material increases the reluctance increases.<ref>[http://sci-toys.com/scitoys/scitoys/magnets/calculating/calculating.html Sci-Toys.com: Magnetism]</ref>		Where <math>\mathcal{R}</math> is reluctance, <math>\mathcal{F}</math> is magnetomotive force, and <math>{\Phi}</math> is the magnetic flux. Reluctance acts the same way as resistance in a wire. Being that as the cross-sectional area of the reluctance decreases, and if the length of the magnetic material increases the reluctance increases.<ref>[http://sci-toys.com/scitoys/scitoys/magnets/calculating/calculating.html Sci-Toys.com: Magnetism]</ref>

			==Reluctance==
			Magnetic Flux (Under Construction...)

	====References====		====References====
	<references/>		<references/>

Andrew.Sell: /* Magnetomotive Force */

2010-01-11T01:08:45Z

Magnetomotive Force

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 The permeability of a material is often measured relative to the permeability of a vacuum (also known as the permeability of free space) whose constant is <math>\mu_0 = 4 \pi \times 10^{-7}</math> giving a relative permeability found by:<ref>[http://www.lightandmatter.com/html_books/0sn/ch11/ch11.html Simple Nature] Benjamin Crowell</ref>
 :<math>\mu_{r} = \frac{\mu}{\mu_{0}} </math>    Thus, materials can be defined by their deviation from 1 (as described above)
 ==Reluctance==

Andrew.Sell: /* Magnetomotive Force */

2010-01-11T00:52:25Z

Magnetomotive Force

← Older revision		Revision as of 17:52, 10 January 2010
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	===Permeability===		===Permeability===
			[[Image:Finding_mu.JPG‎\|thumb\|600px\|right ]]


	Magnetic permeability is a measure of a materials ability to propagate magnetic flux. A higher permeability leads to a stronger magnet. The idea of permeability is similar to that of conduction. Since materials with a high conductivity allow electric current to flow easily, likewise, materials whose permeability is high, allow magnetic flux to move easier.<ref>[http://info.ee.surrey.ac.uk/Workshop/advice/coils/mu/#mu Magnetic properties of materials workshop]</ref>		Magnetic permeability is a measure of a materials ability to propagate magnetic flux. A higher permeability leads to a stronger magnet. The idea of permeability is similar to that of conduction. Since materials with a high conductivity allow electric current to flow easily, likewise, materials whose permeability is high, allow magnetic flux to move easier.<ref>[http://info.ee.surrey.ac.uk/Workshop/advice/coils/mu/#mu Magnetic properties of materials workshop]</ref>

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	:<math>\mu = \frac{\mathbf{B}}{\mathbf{H}}</math>		:<math>\mu = \frac{\mathbf{B}}{\mathbf{H}}</math>

	Thus there are many materials characterized by their permeability values such as paramagnetic materials, whose permeability values generally are below 1 (with respect to <math> \mu_0</math>), paramagnetic materials, whose permeability values fall between 1 and 10 and finally [[Ferromagnetism\|ferromagnetic]] materials, whose permeability values can greatly exceed 10 and are typically non-linear. <ref>[http://geophysics.ou.edu/solid_earth/notes/mag_earth/mag_perm.html GeoPhysics] </ref>Posted permeability values are typically obtained by ~~taking~~ taking the maximum value of the slope ( mu ) of a ~~given Hysteresis~~ curve. <ref>[http://www.ndt-ed.org/EducationResources/CommunityCollege/MagParticle/Physics/Permeability.htm Permeability] </ref>		Thus there are many materials characterized by their permeability values such as paramagnetic materials, whose permeability values generally are below 1 (with respect to <math> \mu_0</math>), paramagnetic materials, whose permeability values fall between 1 and 10 and finally [[Ferromagnetism\|ferromagnetic]] materials, whose permeability values can greatly exceed 10 and are typically non-linear. <ref>[http://geophysics.ou.edu/solid_earth/notes/mag_earth/mag_perm.html GeoPhysics] </ref>Posted permeability values are typically obtained by taking the maximum value of the slope ( <math> \mu </math> ) of a straight line from the origin that is tangent to the B/H curve, ass seen in the figure. <ref>[http://www.ndt-ed.org/EducationResources/CommunityCollege/MagParticle/Physics/Permeability.htm Permeability] </ref>

	The permeability of a material is often measured relative to the permeability of a vacuum (also known as the permeability of free space) whose constant is <math>\mu_0 = 4 \pi \times 10^{-7}</math> giving a relative permeability found by:<ref>[http://www.lightandmatter.com/html_books/0sn/ch11/ch11.html Simple Nature] Benjamin Crowell</ref>		The permeability of a material is often measured relative to the permeability of a vacuum (also known as the permeability of free space) whose constant is <math>\mu_0 = 4 \pi \times 10^{-7}</math> giving a relative permeability found by:<ref>[http://www.lightandmatter.com/html_books/0sn/ch11/ch11.html Simple Nature] Benjamin Crowell</ref>
	:<math>\mu_{r} = \frac{\mu}{\mu_{0}} </math> Thus, materials can be defined by their deviation from 1 (as described above)		:<math>\mu_{r} = \frac{\mu}{\mu_{0}} </math> Thus, materials can be defined by their deviation from 1 (as described above)

	==Reluctance==		==Reluctance==

Andrew.Sell: /* Magnetomotive Force */

2010-01-11T00:26:28Z

Magnetomotive Force

← Older revision		Revision as of 17:26, 10 January 2010
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	:<math>\mu = \frac{\mathbf{B}}{\mathbf{H}}</math>		:<math>\mu = \frac{\mathbf{B}}{\mathbf{H}}</math>

	Thus there are many materials characterized by their permeability values such as paramagnetic materials, whose permeability values generally are below 1 (with respect to <math> \mu_0</math>), paramagnetic materials, whose permeability values fall between 1 and 10 and finally [[Ferromagnetism\|ferromagnetic]] materials, whose permeability values can greatly exceed 10 and are typically non-linear. <ref>[http://geophysics.ou.edu/solid_earth/notes/mag_earth/mag_perm.html GeoPhysics] </ref>Posted permeability ~~vlaues~~ are ~~typcially~~ obtained by taking taking the maximum value of the slope ( mu ) of a given Hysteresis curve. <ref>[http://www.ndt-ed.org/EducationResources/CommunityCollege/MagParticle/Physics/Permeability.htm Permeability] </ref>		Thus there are many materials characterized by their permeability values such as paramagnetic materials, whose permeability values generally are below 1 (with respect to <math> \mu_0</math>), paramagnetic materials, whose permeability values fall between 1 and 10 and finally [[Ferromagnetism\|ferromagnetic]] materials, whose permeability values can greatly exceed 10 and are typically non-linear. <ref>[http://geophysics.ou.edu/solid_earth/notes/mag_earth/mag_perm.html GeoPhysics] </ref>Posted permeability values are typically obtained by taking taking the maximum value of the slope ( mu ) of a given Hysteresis curve. <ref>[http://www.ndt-ed.org/EducationResources/CommunityCollege/MagParticle/Physics/Permeability.htm Permeability] </ref>

	The permeability of a material is often measured relative to the permeability of a vacuum (also known as the permeability of free space) whose constant is <math>\mu_0 = 4 \pi \times 10^{-7}</math> giving a relative permeability found by:<ref>[http://www.lightandmatter.com/html_books/0sn/ch11/ch11.html Simple Nature] Benjamin Crowell</ref>		The permeability of a material is often measured relative to the permeability of a vacuum (also known as the permeability of free space) whose constant is <math>\mu_0 = 4 \pi \times 10^{-7}</math> giving a relative permeability found by:<ref>[http://www.lightandmatter.com/html_books/0sn/ch11/ch11.html Simple Nature] Benjamin Crowell</ref>

Andrew.Sell at 00:25, 11 January 2010

2010-01-11T00:25:52Z

← Older revision		Revision as of 17:25, 10 January 2010
Line 26:		Line 26:
	:<math>\mu = \frac{\mathbf{B}}{\mathbf{H}}</math>		:<math>\mu = \frac{\mathbf{B}}{\mathbf{H}}</math>

	Thus there are many materials characterized by their permeability values such as paramagnetic materials, whose permeability values generally are below 1 (with respect to <math> \mu_0</math>), paramagnetic materials, whose permeability values fall between 1 and 10 and finally ferromagnetic materials, whose permeability values can greatly exceed 10 and are typically non-linear. <ref>[http://geophysics.ou.edu/solid_earth/notes/mag_earth/mag_perm.html GeoPhysics] </ref>~~The~~ permeability		Thus there are many materials characterized by their permeability values such as paramagnetic materials, whose permeability values generally are below 1 (with respect to <math> \mu_0</math>), paramagnetic materials, whose permeability values fall between 1 and 10 and finally [[Ferromagnetism\|ferromagnetic]] materials, whose permeability values can greatly exceed 10 and are typically non-linear. <ref>[http://geophysics.ou.edu/solid_earth/notes/mag_earth/mag_perm.html GeoPhysics] </ref>Posted permeability vlaues are typcially obtained by taking taking the maximum value of the slope ( mu ) of a given Hysteresis curve. <ref>[http://www.ndt-ed.org/EducationResources/CommunityCollege/MagParticle/Physics/Permeability.htm Permeability] </ref>

	The permeability of a material is often measured relative to the permeability of a vacuum (also known as the permeability of free space) whose constant is <math>\mu_0 = 4 \pi \times 10^{-7}</math> giving a relative permeability found by:<ref>[http://www.lightandmatter.com/html_books/0sn/ch11/ch11.html Simple Nature] Benjamin Crowell</ref>		The permeability of a material is often measured relative to the permeability of a vacuum (also known as the permeability of free space) whose constant is <math>\mu_0 = 4 \pi \times 10^{-7}</math> giving a relative permeability found by:<ref>[http://www.lightandmatter.com/html_books/0sn/ch11/ch11.html Simple Nature] Benjamin Crowell</ref>