基于解耦矢量控制的五相永磁同步电机容错控制策略

Fault-Tolerant Control Strategy of Five-Phase PMSM Based on Decoupling Vector Control

关键词:  五相永磁同步电机  解耦矢量控制  容错  故障

Key words:  Five-phase permanent magnet synchronous motor  Decoupling vector control  Fault-tolerant  Fault

摘要:

针对五相永磁同步电机两相开路故障的运行工况，提出了一种基于解耦矢量控制理论的故障容错控制策略。该策略通过在两相开路故障下的同步旋转坐标系内建立电机的数学模型，构造解耦变换矩阵，将电流控制中id和iq轴解耦，达到两相开路故障下容错运行的目的。仿真结果表明，在五相永磁同步电机两相开路故障下，基于解耦矢量控制理论的故障容错控制策略能够实现电机驱动系统的高品质运行，具有控制简单、转矩波动小、容错能力强等优点。

Abstract:

Aiming at the operating conditions of two-phase open-circuit faults of five-phase permanent magnet synchronous motors(PMSM), a fault-tolerant control strategy based on decoupling vector control theory is proposed. This strategy achieves the purpose of fault-tolerant operation under two-phase open-circuit faults by establishing a mathematical model of the motor in a synchronous rotating coordinate system under two-phase open-circuit faults, constructing a decoupling transformation matrix, and decoupling the id and iq axes in current control. Simulation results show that under two-phase open-circuit faults of a five-phase PMSM, a fault-tolerant control strategy based on decoupling vector control theory can achieve high-quality operation of the motor drive system, with simple control, small torque ripple, and strong fault tolerance advantages.