无速度传感器永磁同步电机预测电流控制策略

Predictive current control strategy of permanent magnet synchronous motor without speed sensor

针对传统控制中电流环采用PI调节器存在的延时,基于永磁同步电机数学模型推导无差拍预测电流控制模型,利用预测电流控制提高系统暂、稳态性能.在此基础上,针对预测电流控制对于电机参数变化高敏感性的特点以及机械传感器测速成本高、精度低的问题,引入鲁棒因子,并利用波波夫稳定理论推导了控制系统模型参考自适应转速估算模型,设计了无速度传感器永磁同步电机预测电流控制系统.搭建控制系统Matlab仿真模型和电机对拖实验平台,仿真与实验结果的一致验证了所采用控制策略的有效性,表明该系统具有较高的转速辨识精度以及良好的动稳态特性.

In order to solve the problem of the time delay using PI regulator for current loop in traditional control,this paper derives the model of the deadbeat predictive current control based on the mathematical model of permanent magnet synchronous motor to improve the transient and steady state performance of the system.On this basis,for the problems of the high sensitivity of predictive current control system to motor parameter variation and the high cost and low precision of mechanical sensor speed measurement,this paper introduces the robust factor and uses Popov stability theory to derive the model references adaptive speed estimation model of the control system,and designs the predictive current control system of permanent magnet synchronous motor without speed sensor.A simulation model by using the Matlab is built and a motor tow object platform is constructed.Simulation and experiment results verify the effectiveness of the control strategy,and show that the system has high speed identification accuracy and good dynamic stability characteristics.