关键词: 电子油泵；矢量控制；永磁无刷直流电机；混合动力变速器；双闭环 PI 控制

Abstract: The electronic oil pump is a highly integrated vehicle part integrating electronics, machinery and hydraulics. Its control strategies are different according to the requirements of the application environment and the types of driving motors. This paper studies the control strategy of the electronic oil pump applied to the vehicle hybrid power transmission, combs the mathematical model of the motor and the basic theory of vector control, builds the simulation model of the electronic oil pump based on Simscape, and the simulation results show that the electronic oil pump starts smoothly, the speed response speed is less than 200 ms, and the torque ripple under steady state conditions is about 5.88%. From the simulation results, it can be seen that the strategy of double closed loop vector control combined with maximum torque per ampere (MTPA) control and weak magnetic control algorithm has the ability to realize the function of electronic oil pump. The test verification proves that under the common working conditions of the vehicle, the output high-pressure pressure of the electronic oil pump can reach 50 bar, the maximum lubrication flow can reach 21.4 L/min, and the consistency of flow output of different electronic oil pumps is less than± 4%.

Key words: Electronic oil pump; Vector control; Permanent magnet brushless DC motor; Hybrid transmission; Double closed loop PI control