Table 3 Main design parameters for prototype of REMC-NFM

Coercive force \({H}_{\mathrm{c}}\)(A/m)

−890000

PM length \({l}_{\mathrm{m}}\) (mm)

24

PM permeability \({\mu }_{\mathrm{m}}\) (H/m)

1.0997×μ₀

PM sectional area \({A}_{\mathrm{m}}\) (mm²)

5×18

Armature force arm length \(a\) (mm)

23.5

Armature length \({l}_{\mathrm{ar}}\) (mm)

50

Armature sectional area \({A}_{\mathrm{ar}}\) (mm²)

3×28.3

Yoke pole shoe length \({l}_{\mathrm{yp}}\) (mm)

15

Yoke pole shoe sectional area \({A}_{\mathrm{yp}}\) (mm²)

10×20

Yoke coil length \({l}_{\mathrm{yc}}\) (mm)

35

Yoke coil sectional area \({A}_{\mathrm{yc}}\) (mm²)

5×18

Armature permeability \({\mu }_{1}\) (H/m)

0.0048

Yoke permeability \({\mu }_{2}\) (H/m)

0.0102

Air gap area \({A}_{\mathrm{g}}\) (mm²)

10×28.3

Air gap length \({L}_{\mathrm{g}1}\) (mm)

28.3

Air gap width \({L}_{\mathrm{g}2}\) (mm)

10

PM flux utilization \(\gamma\)

0.45

Control coil flux utilization \(\delta\)

0.85

Pitch angle \(\beta\) (°)

45