电动汽车PMSM MTPA控制系统抗积分饱和速度控制

An Anti-Windup Saturation Velocity Control of PMSM MTPA Control System for Electric Vehicles

电动汽车电机驱动系统大多采用传统PI控制,存在积分饱和现象,系统易产生超调和振荡问题,因此将抗积分饱和控制策略引入永磁同步电机最大转矩电流比控制调速系统中,以提升系统的稳定性。采用反馈算法求解转矩电流高次方程,解决了高次方程求解困难的问题,实现了最大转矩电流比控制;速度环和电流环均采用抗积分饱和PI控制,有效地抑制了积分饱和,减小了系统的超调量,提高了电机控制精度。基于Matlab/Simulink搭建了系统模型并进行仿真,仿真结果表明,所设计的系统有效地抑制了积分饱和现象,减少了速度的超调,具有良好的动态和稳态性能,可以较好地满足电动汽车电机驱动系统的要求。

The integral saturation found in the traditional PI control, which is mostly used in the motor drive system of electric vehicles, results in a liability of the system to overshoot and oscillation. Therefore, the anti-integral saturation control strategy has been introduced into the maximum torque-current ratio control speed regulation system of permanent magnet synchronous motor(PMSM) to improve the stability of the system. The feedback algorithm is adopted to solve the higher degree torque-current equation, which helps to solve the problem of solving the high-order equation and realizes the maximum control of the torque-current ratio. Both the speed loop and current loop adopt the anti-windup PI control, which effectively restrains the integral saturation, thus reducing the overshoot of the system, and improving the motor control accuracy. A system model has been built and simulated based on Matlab/Simulink, with simulation results verifying the ef?ciency of the designed system in suppressing the integral saturation. With a good dynamic and steady performance, it helps to reduce the overshoot of speed, thus meeting the requirements of electric vehicle motor drive systems very well.