PM coercivity |
Hc |
930,000 |
A/m |
PM remanence |
Br |
1.28 |
T |
PM length |
Lm |
0.008 |
M |
PM sectional length |
La |
0.314 |
M |
PM sectional height |
Lb |
0.01 |
M |
Pole shoe's initial teeth width |
Lt |
0.0002 |
M |
Pole shoe's initial groove width |
Ls |
0.0008 |
M |
Initial gap |
lg |
0.0002 |
M |
Saturation magnetisation of magnetic liquid |
Ms |
400 |
G |
Permeability of vacuum |
μ0 |
4π × 10−7 |
T·m/A |
Relative magnetic permeability of pole shoes |
μj |
100 |
|
Relative magnetic permeability of ordinary sealant |
μp |
1 |
|
Relative magnetic permeability of magnetic sealant |
μd |
4 |
|
Remark |
In theoretical calculation, 1/3 of groove width added with 1/2 of teeth width is taken as the upper limit of integral, and 1/2 of teeth width is taken as the lower limit. |