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Hard Magnetic Material

Modelica Standard Library

	Description
	Typical values for remanence, coercivity, and the temperature coefficient of remanence are provided for common permanent magnetic materials. The operating values are given by $B_{r} = B_{r (ref)} (1 + α_{Br} (T_{op} - T_{ref}))$ $H_{cB} = H_{cB (ref)} (1 + α_{Br} (T_{op} - T_{ref}))$ $μ_{r} = \frac{B_{r}}{μ_{0} H_{cB}}$

Variables

Name	Units	Description	Modelica ID
$H_{cB}$	$\frac{A}{m}$	Coercivity at operating temperature	H_cB
$B_{r}$	$T$	Remanence at operating temperature	B_r
$μ_{r}$	$1$	Relative permeability at operating temperature	mu_r

Parameters

Name	Default	Units	Description	Modelica ID
$H_{cB (ref)}$	$1$	$\frac{A}{m}$	Coercivity at reference temperature	H_cBRef
$B_{r (ref)}$	$1$	$T$	Remanence at reference temperature	B_rRef
$α_{Br}$	$0$	$\frac{1}{K}$	Temperature coefficient	alpha_Br
$T_{op}$	$293.15$	$K$	Operating temperature	T_op
$T_{ref}$	$293.15$	$K$	Reference temperature	T_ref

Data

Material	$H_{cB (ref)}$	$B_{r (ref)}$	$T_{ref}$	$α_{Br}$	$T_{op}$
BaseData	1	1	293.15	0	293.15
NdFeB	900000	1.2	293.15	-0.001	293.15
Sm2Co17	750000	1.02	293.15	-0.0003	293.15
SmCo5	720000	0.95	293.15	-0.0004	293.15
PlasticNdFeB	400000	0.58	293.15	-0.001	293.15
PlasticSmCo	385000	0.57	293.15	-0.0004	293.15
HardFerrite	170000	0.38	293.15	-0.002	293.15
PlasticHardFerrite	130000	0.21	293.15	-0.002	293.15

	Modelica Standard Library
	The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.

See Also

Magnetic Library

Magnetic Material

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