内置式永磁同步电机改进最大转矩电流比控制

An Improved Maximum Torque Per Ampere(MTPA)Control Method of IPMSM Systems

为了充分利用磁阻转矩,内置式永磁同步电机基速以下常采用最大转矩电流比(Maximum Torque Per Ampere,MTPA)控制策略。传统的公式计算法因电机参数随运行工况发生非线性变化,存在MTPA角度失准、控制精度差的问题。而虚拟信号注入法因需要低通滤波器、带通滤波器和积分器等,存在响应速度慢、动态性能不佳的问题。为此,本文将两种方法相结合,提出了一种改进型MTPA控制策略,在保证MTPA控制准确性的同时,提升了动态响应能力。在此基础上,所提方法的可行性和有效性通过多工况仿真验证。

To fully utilize the reluctance torque of interior permanent magnet synchronous machine(IPMSM)drives,Maximum Torque Per Ampere(MTPA)control strategy is often used below base speed.The traditional parameter calculation method has nonlinear problems due to motor parameters with operating conditions,which lead to poor MTPA control accuracy.Virtual Signal Injection Control(VSIC)method process the signal with bandpass filter,lowpass filter and integral regulator,which had a poor dynamic response.To solve the above problems,an improved control algorithm is proposed in this paper,which not only ensures the steady-state accuracy of MTPA control,but also improves the dynamic response ability.The effectiveness of the proposed method is verified by experiments under various operating conditions on a prototype IPMSM drive system.