感应式电气变速器的电磁耦合与解耦控制

Induction type electrical variable transmission's electromagnetic coupling and its decoupling control

针对基于感应电机原理的电气变速器共外转子同心分布结构造成的内部电磁耦合问题,研究耦合场的分布规律及其对主参数的影响。使用有限元仿真定量计算电气变速器内、外电机相自感和互感的变化范围,基于所得电感数值并结合所推系统数学模型进行变参数系统建模;参照恒定参数模型对电气变速器内、外电机的绕组相电流和输出机械转矩、转速的变化情况进行对比仿真分析。结果表明恒参数模型输出转矩波动,转速失控,而变参数模型结果合理;通过样机实验验证了变参数解耦算法的正确性。

On account of magnetic coupling inside of induction machine based electrical variable transmission（EVT） which was of concentrically arranged structure with a common outer rotor,the coupling field distribution discipline and its influence on EVT＇s main parameters was researched.Finite element method（FEM） simulation was used to calculate the the self phase inductances of both inner and outer machines as well as the mutual inductance between them.Integrated with deduced mathematical model the system simulation model with variable inductance parameters was built.Referred to the model with constant parameters,EVT＇s phase currents and output mechanical torque and speed results was compared,which shows that the constant parameters＇ model will lead to torque fluctuation and speed unstability,while the variable parameters＇ model can achieve reasonable result.The correctness of decoupling algorithm with variable parameters was validated through prototype experimental test.