Research Article
Five-Phase Modular External Rotor PM Machines with Different Rotor Poles: A Comparative Simulation Study
Table 4
Machine performance indices for different number of rotor poles.
| | Number of rotor poles | 14 | 18 | 22 |
| | Speed (rpm) | 240 | 240 | 240 | | Frequency (Hz) | 28 | 36 | 44 | | RMS phase voltage (V) | 97 | 107 | 114 | | RMS phase current (A) | 23.5 | 19.1 | 17.6 | | Load torque (Nm) | 300 | 300 | 300 | | Torque ripples (ΔT) | 30 | 10 | 12 | | Load power (W) | 7543 | 7543 | 7543 | | Core loss (W) | 88 | 115 | 133 | | Input power (W) | 9562 | 8948 | 8697 | | Efficiency (%) | 78.8 | 84.3 | 86.7 | | Torque per rms current (Nm/A) | 12.77 | 15.7 | 17.05 |
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