中文摘要：

针对传统功率匹配方法中存在的转矩脉动问题,提出一种具备恒转矩特性的永磁同步电机（PMSM）驱动系统功率匹配方法。该方法利用PMSM无功功率特性,在不影响输出机械功率特性的基础上,实现整流、逆变侧功率的有效平衡。通过在定子无功电流上叠加一个高频正弦小信号,实现逆变、整流侧功率匹配,同时高频无功分量的注入并未对PMSM转矩输出造成影响。为了求解电流分配时的高阶、复杂方程,迭代搜索算法的使用保证了方程的可求解性。最后,搭建了一台35 kW的PMSM调速系统实验样机,对所提恒转矩功率平衡方法进行实验分析。结果表明,在该方法下PMSM系统可实现功率平衡和转矩恒定两项指标的综合控制,有效降低了系统对直流母线电容的选型要求,降低了PMSM调速系统的整体体积和设计成本。

英文摘要：

In view of the existing torque ripple problem in the traditional power matching method, aPMSM drive system power matching metchod is put forward with constant torque characteristics.The method uses permanent manent synchronous motor （PMSM） reactive power characteristics to realize the effectively balance of rectifier and inverter side power,on the basis of output mechanical power characteristics is not affected.The rectifier and inverter side power match is realized, and the high frequency reactive component injection dose not effect the torque output, through a small high frequency sine signal is superimposed on the stator reactive current.In order to solve the high order,complex equations of current distribution,the iterative search algorithm is used.Finally a 35 kW prototype of PMSM speed regulation system is built, the constant torque power balancing method is analyzed for experiment.The experimental results show that PMSM system can realize the balance of power and torque constant two indicators for integrated control, effectively reduce the DC bus capacitor selection requirements, and the overall volume of PMSM speed control system and design costs.