Design optimisation of wide-speed permanent magnet synchronous motors

A constant parameter equivalent circuit model that neglects motor losses is used to determine the effects of motor parameters and the inverter power ratings on the torque-speed characteristics over a wide speed range. Analytical models for the estimation of motor parameters based on the rotor geometries are set up. The optimisation of PMSM design is then conducted to meet the required motor parameters for the given torque-speed characteristics.