直接转矩控制变频调速系统的逆变器触发系统逻辑设计

The Logical Design for the Trigger Inverter in the Direct Self control System

从直接转矩控制原理出发，分别分析了异步电动机在正转和反转过程中磁链开关状态值与逆变器开关状态值间的逻辑关系及对应关系，并找到了正、反转切换时上述二方面存在的区别和联系。通过Ｐ／Ｎ控制器和转矩调节器实现对逆变器触发系统的正确控制。

In this paper the logical and homologous relation between magnetic chain switch state and inverter switch state about asynchronous motor revolving in the positive and negative rotation are analysed by direct self control principle,and the difference and relation in magnetic chain switch state and in inverter switch state between the changing of the positive and negative rotation is given.The trigger inverter system is controlled properly by P/N controller and torque controller.