带转子参数辩识的五相感应电动机无速度传感器控制策略研究

Research on Speed Sensorless Control Strategeis for Five-phase Induction Motors With Rotor Parameter Identification

多相感应电机具有多平面特性,该文以五相感应电机为例,利用基波平面和三次谐波平面的正交特性,实现两个平面参数的并行辨识。其一,为实现宽范围的无速度传感器运行,克服传统滑模观测器低速性能差等缺点,在三次谐波平面中采用带定子电阻辨识的滑模速度观测器。其二,基波平面采用转子时间常数在线观测算法,消除因温度、集肤等引起转子参数变化的负面效应,为无速度传感器算法提供精确的电机参数,进一步提高电机瞬态性能。为此,构建了一套五相感应电机控制系统,仿真和实验结果证明了带转子参数辨识无速度传感器控制策略的可行性。

Multiphase induction motors contain multiple independent vector planes. This paper focuses on the parameter identification in the dual orthogonal planes for five-phase induction motors. Firstly, the sliding mode observer with stator resistance identification was adopted in the third harmonic plane. It is used to realize the rotor speed estimation in the wide range, and the low speed performance is improved significantly. Secondly, the online rotor parameter identification algorithm is adopted in the fundamental plane to provide precise motor parameters. The transient performance is heightened with identification for the rotor parameter variation caused by temperature variation and skin effects. A five-phase induction motor drive is constructed, and experimental results verify the feasibility of the sensorless control strategy with rotor parameter identification.