Table 6 Harmonic analysis of airgap magnetic flux density (B2) that determines the main cogging torque.

From: Structural effects of asymmetric magnet shape on performance of surface permanent magnet synchronous motors

Content

S-SPMSM-I

G-SPMSM-I

L-SPMSM-I

N-SPMSM-I

Harmonic order of B2

6

6

6

12

Magnitude of B2

0.0032

0.00235

0.00236

0.000228

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