永磁同步电机磁链和转矩无差拍控制

针对永磁同步电机直接转矩控制转矩脉动较大的问题，提出磁链和转矩无差拍控制。建立了基于定子磁链坐标系的永磁同步电机磁链与转矩变化量简化计算模型，验证了简化模型的可行性，给出了基于简化模型的磁链和转矩无差拍控制计算过程，并采用空间矢量调制技术(DB-SVM)与模型预测控制技术(DB-MPC)实现无差拍控制。为了降低开关频率，提出一种将空间矢量调制与模型预测控制相结合来实现无差拍控制的方法。仿真结果表明:该方法可在保证系统良好运行同时，有效降低开关损耗与转矩脉动。

Dead-beat Control of Stator Flux and Torque in Permanent Magnet Synchronous Motor

In order to solve high torque ripple of permanent magnet synchronous motor(PMSM)direct torque control(DTC)system,dead-beat(DB)control of stator flux and torque was proposed.Simplified models to calculate the change of torque and stator flux due to the application of voltage vector on stator flux coordinate system were proposed.And it was proved the models can be used in DB control system.The DB control of stator flux and torque using these simplified models were given.And space vector modulation(SVM)and model predictive control(MPC)were used to implement the DB control,respectively.In order to decrease the switching frequency,a method that combines SVM and MPC to implement the dead-beat control was proposed,called DB-SVM-MPC.Simulation results show the DB-SVM-MPC can achieve good control performance and decrease switching frequency and torque ripple.