Hard Magnetic - MapleSim Help
For the best experience, we recommend viewing online help using Google Chrome or Microsoft Edge.

# Online Help

###### All Products    Maple    MapleSim

Hard Magnetic Material

 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 ${B}_{r}={B}_{r\left(\mathrm{ref}\right)}\left(1+{\mathrm{\alpha }}_{\mathrm{Br}}\left({T}_{\mathrm{op}}-{T}_{\mathrm{ref}}\right)\right)$ ${H}_{\mathrm{cB}}={H}_{\mathrm{cB}\left(\mathrm{ref}\right)}\left(1+{\mathrm{\alpha }}_{\mathrm{Br}}\left({T}_{\mathrm{op}}-{T}_{\mathrm{ref}}\right)\right)$ ${\mathrm{\mu }}_{r}=\frac{{B}_{r}}{{\mathrm{\mu }}_{0}{H}_{\mathrm{cB}}}$

Variables

 Name Units Description Modelica ID ${H}_{\mathrm{cB}}$ $\frac{A}{m}$ Coercivity at operating temperature H_cB ${B}_{r}$ $T$ Remanence at operating temperature B_r ${\mathrm{\mu }}_{r}$ $1$ Relative permeability at operating temperature mu_r

Parameters

 Name Default Units Description Modelica ID ${H}_{\mathrm{cB}\left(\mathrm{ref}\right)}$ $1$ $\frac{A}{m}$ Coercivity at reference temperature H_cBRef ${B}_{r\left(\mathrm{ref}\right)}$ $1$ $T$ Remanence at reference temperature B_rRef ${\mathrm{\alpha }}_{\mathrm{Br}}$ $0$ $\frac{1}{K}$ Temperature coefficient alpha_Br ${T}_{\mathrm{op}}$ $293.15$ $K$ Operating temperature T_op ${T}_{\mathrm{ref}}$ $293.15$ $K$ Reference temperature T_ref

Data

 Material ${H}_{\mathrm{cB}\left(\mathrm{ref}\right)}$ ${B}_{r\left(\mathrm{ref}\right)}$ ${T}_{\mathrm{ref}}$ ${\mathrm{\alpha }}_{\mathrm{Br}}$ ${T}_{\mathrm{op}}$ 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