Five-Phase Modular External Rotor PM Machines with Different Rotor Poles: A Comparative Simulation Study

Table 2

Comparison between the three machines based on FE results.

No. of rotor poles	14	18	22
Speed (rpm)	240	240	240
Frequency (Hz)	28	36	44
RMS phase voltage (V)	97	107	114
Developed torque (T)	266	332	357
Torque ripples (ΔT)	40	15	20
Input power (W)	8400	10080	10725
Core loss (W)	88	115	133
Developed power (W)	6685	8344	8972
Efficiency (%)	79.6	82.7	83.7
Torque per RMS phase current (Nm/A)	12.5	15.6	16.8