轴向线圈辅助磁阻型双凸极电机控制策略研究

Control strategy of axial coil assisted reluctance doubly salient motor

针对传统永磁直流电机中永磁体在高温高压下可能退磁并且不能调磁的问题,设计一种轴向线圈辅助磁阻型双凸极电机,并依据双凸极电机的运行原理,基于该电机的特殊结构和电感模型,在标准角度导通方式的基础上提出一种三相六状态角度导通方式。通过搭建双组功率逆变模块,利用中央辅助励磁线圈可增磁弱磁的原理,提出励磁电流—转矩直接控制策略,通过控制换相时刻励磁电流的大小以实现励磁电流的自适应调节进而实现对输出转矩的控制。最终经过场—路耦合分析和实验分别验证控制方法的可行性和有效性,使电机运行更加平稳。

An axial coil assisted reluctance doubly salient motor was designed for the problem that the permanent magnet might demagnetize and could not be magnetized under high temperature and high pressure in permanent magnet DC motor.According to the principle of the double salient motor,based on the special structure and inductance model of the motor,a three phase six-state angle conduction mode was put forward on the basis of the standard angle conduction mode.An excitation current-torque direct control strategy based on the central excitation coil with a two-group power inverter module was proposed.By controlling the excitation current at the commutation moment to realize the adaptive adjustment of the excitation current the torque control was achieved.Ultimately the feasibility and effectiveness of the control method making the motor run more smoothly are verified by the field-circuit coupled analysis and experiments.