Structural Design and Control System Simulation of an Electric Excitation Type Homopolar Motor

Abstract

High speed permanent magnet motor technology is becoming a research hotspot in the field of electrical engineering. Towards the common problem of high speed permanent magnet motor, such as large rotating iron loss and low rotor strength, an electric excitation type homopolar motor have been studied. The rotor of the electric excitation type homopolar motor has no permanent magnet and sheath, and the pole polarity alternation doesn’t exist along the circumferential direction of the rotor, which leads to both high rotor strength and low iron consumption. The structural design of the homopolar motor and theoretical analysis of its mathematical characteristics has been carried out. A sensorless motor control strategy is formulated, whose simulation model has been built. The simulation results show that the control system has good static and dynamic characteristics, which provides an important basis for the design and debugging of the control system.