永磁同步电机转子位置复合检测及起动运行策略

电梯用永磁曳引机的驱动控制需要实时获取转子的机械角度,如何在曳引机起动及运行阶段准确地检测转子位置是需要解决的关键问题。基于正余弦型复合编码器,提出一种绝对式与增量式相结合的转子位置复合检测方案。首先在分析绝对式和增量式转子位置检测原理的基础上,对两种转子位置检测算法进行优化,提高转子位置检测精度;然后结合转矩最大矢量控制策略,提出在转子位置复合检测方案下的电机起动运行方案;最后,仿真与实验结果表明所提出的转子位置复合检测方案可以保证电机的正常稳定运行。

Rotor position composite detection and start operation strategy of permanent magnet synchronous motor

The driving control of the elevator permanent magnet traction machine needs to obtain the mechanical angle of the rotor in real time. How to accurately detect the rotor position during the starting and operation phases of the traction machine is a key issue to be solved. Aiming at this problem, this paper proposes a composite rotor position detection scheme combining absolute and incremental detection based on sin cos composite encoder. Firstly, based on analyzing the principle of absolute and incremental rotor position detection, two rotor position detection algorithms are optimized to improve the rotor position detection accuracy. Then, combining with the rotor maximum vector control strategy, the motor starting and operation scheme is proposed under the rotor position composite detection scheme. Finally, the simulation and experiment results show that the proposed rotor position composite detection scheme can ensure the normal and stable operation of the motor.