一种频率可变的新型他激逆变触发方案

A New Variable Frequency Separate Excitation Control Method for Inverters

针对几种传统逆变器控制方法存在的缺点,本文基于串联逆变的特性提出了一种新逆变触发控制方法。该方法是一种频率可与逆变谐振频率相匹配的他激触发。经试验验证,可以实现触发频率和逆变频率相匹配,从而使逆变器工作在最大功率输出的状态下。经在一台1 000kW的可控硅中频电源上应用,逆变器工作稳定正常。该方法原理简单,实现容易,维护成本低,可以在逆变电源中推广。

There are several disadvantages in traditional inverter control methods. In order to get over these disadvantages, this paper presents a new separate excitation control method. The frequency of trigger pul- ses of this new control method can match the changing of the resonant frequency of inverters. The PCB based on the new control method is made out and the experiment results are given. The new control meth- od controls the inverting successfully in a 1000KW SCR medium frequency power supply. This control method could be broadly generalized in other power electronics devices.