Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Winding distribution of double layer 10p12s winding_
| Tooth number | U | V | W | Sum |
|---|---|---|---|---|
| 1 | 1 | - | - | 1 |
| 2 | −1 | - | - | 1 |
| 3 | - | −1 | - | 1 |
| 4 | - | 1 | - | 1 |
| 5 | - | - | 1 | 1 |
| 6 | - | - | −1 | 1 |
| 7 | −1 | - | - | 1 |
| 8 | 1 | - | - | 1 |
| 9 | - | 1 | - | 1 |
| 10 | - | −1 | - | 1 |
| 11 | - | - | −1 | 1 |
| 12 | - | - | 1 | 1 |
Winding distribution of quadruple layer 10p13s winding_
| Tooth number | U | V | W | Sum |
|---|---|---|---|---|
| 1 | 0.87 | - | - | 0.87 |
| 2 | −0.32 | 0.66 | - | 0.98 |
| 3 | - | −0.60 | 0.39 | 0.99 |
| 4 | 0.08 | - | −0.82 | 0.9 |
| 5 | −0.72 | - | 0.24 | 0.96 |
| 6 | 0.53 | −0.47 | - | 1 |
| 7 | - | 0.78 | −0.16 | 0.94 |
| 8 | - | −0.16 | 0.78 | 0.94 |
| 9 | 0.53 | - | −0.47 | 1 |
| 10 | −0.72 | 0.24 | - | 0.96 |
| 11 | 0.08 | −0.82 | - | 0.9 |
| 12 | - | 0.39 | −0.60 | 0.99 |
| 13 | −0.32 | - | 0.66 | 0.98 |
FEM simulation results_
| Mean torque (Nm) | 2.77 | 2.5 | 2.51 | 2.53 |
| Voltage constant (Vrms/rad) | 0.171 | 0.154 | 0.154 | 0.151 |
| Cogging torque (Nm) | 0.0524 | 0.0008 | 0.0126 | 0.0028 |
| Relative cogging torque (%) | 1.89 | 0.03 | 0.50 | 0.11 |
| Torque ripple under load (Nm) | 0.064 | 0.0035 | 0.0159 | 0.0065 |
| Relative torque ripple under load (%) | 2.30 | 0.14 | 0.63 | 0.26 |
| Lateral force ripple (N) | 0.025 | 0.016 | 0.201 | 0.879 |
FEM simulation results for eccentric rotor (0_2 mm shift off centre)_
| Mean torque in Nm | 2.77 | 2.5 | 2.51 | 2.53 |
| Voltage constant in Vrms/rad | 0.171 | 0.154 | 0.154 | 0.151 |
| Cogging torque in Nm | 0.0588 | 0.0013 | 0.016 | 0.0208 |
| Relative cogging torque (%) | 2.12 | 0.05 | 0.64 | 0.82 |
| Torque ripple under load in Nm | 0.0686 | 0.008 | 0.0212 | 0.024 |
| Relative torque ripple under load (%) | 2.48 | 0.32 | 0.84 | 0.95 |