关键词: 内置式永磁同步电机, 弱磁控制, 查表法, 单张表, 最大转矩电流比, 最大转矩电压比

Abstract: In order to solve the problem of uncontrollable current entering deep weak region in the flux weakening control of interior permanent magnet synchronous motor for electric vehicle, based on the two-dimensional table lookup method of torque speed which was convenient for engineering application. The complex engineering quantity problem was improved that the two-dimensional table lookup method of voltagehad to use multiple tables in order to cope with voltage fluctuation. Through the proportional conversion of the speed derivation formula, the two-dimensional table lookup method of single table torque speed could realize magnetic weak control. The method realized the motor to run smoothly in the deep weak field under the condition of bus voltage fluctuation. The method had the advantages of small amount of engineering, easy realization and parameter setting. Through modeling simulation, the control method was verified and the expected results were achieved.

Key words: interior permanent magnet synchronous motor(IPMSM), flux weakening control,look-up table method, a single table, maximum torque per ampere(MTPA), maximum torque per voltage(MTPV)