基于Matlab的交-交变频器性能分析

交-交变频器由36只晶闸管组成,其输入电压截取部分经拼接形成输出电压.触发脉冲时刻由余弦交截法产生.主电路含2个反并联整流电路,晶闸管触发脉冲控制模块主体为同步6脉冲发生器,输出双窄脉冲以控制晶闸管断通.系统建模在实际确定的导通模式基础上加上两管换流模式和正负换组模式;触发控制中正组变换器使负载输入电流为正,负组变换器使其为负.并通过Matlab仿真不同负载下的运行,实现交-交变频器电流电压分析.

Performance Analysis of Cycloconverter Based on Matlab

Cycloconverter consists of 36 pieces of thyristor, the intercepying parts of input voltage are put together to form output voltage. Trigger pulse time is controlled with cosine-nodical method. The main circuit of cycloconverter consists of two rectifiers in reverse parallel connection. The main part of trigging pulses control module for thyristor is a synchronized 6-pulse generator, which outputs double-narrow pulse to control the thyristor to be on or off state. System modeling also consists of two thyristor commutating current mode and shift operation mode between positive and negative converters. The positive converter makes the load current to be positive in trigging control, while the negative converter is negative. The modeling is simulated to make it operate with different loads, and harmonic characteristics of output voltage and current for the cycloconverter are analyzed.