电磁式双凸极电机的非线性电感建模

电磁式双凸极电机是一种新型交流调速电机。目前对其研究主要是在基于分段线性电感函数建立的模型基础上进行的。为了能更加准确地反映电机电磁特性，本文提出了另一种建模方法：非线性电感建模。该方法首先通过数值方法得到不同相电流及励磁电流下的非线性电感函数和曲线，在此基础上构建电机模型。并就这种非线性建模方法和分段线性电感建模方法对系统性能的影响进行了比较，最后进行了仿真验证。理论和仿真结果表明：非线性电感模型和分段线性电感模型反映的电流特性基本一致，电流闭环控制时两种模型反映的平均转矩相同。但转矩脉动特性有所不同。非线性电感模型较分段线性电感模型准确。因此非线性电感模型适用于分析电机的转矩脉动特性。

Modeling for Doubly-Salient Electro-Magnet Motor Based on Nonlinear Inductance

The doubly-salient electro-magnet motor is a new kind of AC adjustable motor. The study on the motor is carried out mostly on the ideal linearized inductance model. In order to show the electro-magnetic characteristics of the motor more accurately, a new kind of modeling method is presented, the method is based on the nonlinear inductance, which function and curve are obtained under the conditions of different phase current and exciting current. In this paper, the different infection on performance for the motor system is analysised by comparisons between two modeling methods, the simulation is carried out to testify the analyses. The theoretical study and the simulation indicate that the linear and nonlinear modeling methods are essentially coincident in current characteristics, and show that the average torque characteristics have the same performances under the closed-loop control condition. But the torque ripple characteristics are different and the nonlinear modeling method is more accurate, it is helpful in the study of torque ripple problem.