Synchronous Motor for Electric Vehicles

The disc coreless permanent magnet synchronous motor (DCPMSM) has several advantages, such as strong overload capacity, zero cogging orque, sinusoidal distribution of flux density and back EMF and linear parameters. It is particularly suitable for the workplace where are special requirements of the motor volume, low-speed performance, fast response and strong overload ability. The motors tend to have low inductance because of the coreless structure. There is a stringent current ripple in the motor winding that produces unacceptable torque ripple if driven from
conventional drivers with a PWM control method based on voltage source inverter.