基于有限元分析的永磁同步电机实时模拟器研究

Research on Real-time Emulator Based on Finite Element Analysis for Permanent Magnet Synchronous Motor

针对三相永磁同步电机,设计了一种功率硬件在环的实时电机模拟器结构.提出了一种基于三相定子坐标系的永磁同步电机电流-磁链有限元反查表模型,建立了接口电路的数学模型,基于此提出了电压前馈电流反馈控制的接口算法,并针对电流反馈环节提出了一种模糊PI控制算法.通过Matlab/Simulink及其与JMAG-RT的联合仿真实验测试方法对接口控制算法和电机模拟器进行了测试与对比分析.仿真结果表明:在额定工况下,所提出的接口控制算法对期望相电流值的跟踪误差小于2%,所提出的电机模拟器对电机相电流及转速特性的模拟误差均小于3%,验证了其有效性.

For three-phase permanent magnet synchronous motors,a power hardware-in-the-loop based real-time motor emulator was proposed.Firstly,a current-flux finite element back-lookup table model of permanent magnet synchronous motor based on three-phase stator coordinate system was proposed,and a mathematical model of the interface circuit was established.Based on this,the interface feedback control algorithm of voltage feedforward current was proposed,and a Fuzzy PI control algorithm was proposed for the current feedback link.Finally,a co-simulation experiment test method of Matlab/Simulink and JMAG-RT was used to simulate,analyze and verify the effectiveness of the proposed interface control algorithm and motor emulator.The simulation results show that,under rated conditions,the tracking error of the proposed interface control algorithm for the desired phase current can be less than 2%,and the emulation error of the proposed motor emulator for the motor phase current and speed characteristics can be less than 3%,verifying their effectiveness.