Ship propulsion with low inductance PMSM

摘要

A special permanent magnet synchronous motor for ship propulsion is presented. It is fed by a PWM-voltage source inverter with field oriented control. A motor feature is the very low stator inductance. It leads to low reactive power and high maximum torque, but on the other hand it produces large current ripples and therefore harmonic power losses of 10 % of the electrical input power. Further research will reduce the harmonic power losses and improve the motor efficiency.