张晓,史军伟,王越,刘业钊.内置式永磁同步电机精确参数的MTPA控制[J].电测与仪表,2023,60(10):124-128. zhangxiao,shijunwei,wangyue,liuyezhao.MTPA Control of Precise Parameters for Interior Permanent Magnet Synchronous Motor[J].Electrical Measurement & Instrumentation,2023,60(10):124-128.
内置式永磁同步电机精确参数的MTPA控制
MTPA Control of Precise Parameters for Interior Permanent Magnet Synchronous Motor
Maximum torque per ampere (MTPA) control of Interior Permanent Magnet Synchronous Motor (IPMSM )makes full use of the characteristic of rotor magnetic circuit asymmetry to improve the load capacity. In the actual control, the electrical parameters of IPMSM fluctuate due to magnetic saturation and temperature change etc., resulting in the actual MTPA control deviating from the predetermined track, so the control cannot be realized accurately. In view of the change of parameters, MTPA control in the electric vehicles mostly adopts the look-up table method, but the process of making the table is complex and time-consuming. In order to solve these problems, the forgetting factor recursive least square method is used to identify the motor parameters online, and the real-time parameters obtained are employed in MTPA control, which improves the robustness and accuracy. The given value of d- and q-axes current is obtained by using the relationship between stator current and d- and q-axes current under MTPA control, which is simple in principle and easy to realize. The control system model is built by Matlab / Simulink, and the simulation results verify the accuracy and effectiveness of the proposed method.
