微机控制的三相循环变频器的研究

分析了三相－三相循环变频器的工作原理、运行方式及控制方法，在此基础上提出了一种具有正弦波输出的实时控制方案，即三相循环变频器按调制函数规律进行触发控制的微机直接数字控制系统。根据这一方案，研制了一台局部环流运行方式三相－三相循环变频器。实验结果证明了该方案的正确性。

The study of single-chip microprocessor controlled three-phase cycloconverters

This peper analyses the operation principle, operating modes and control methods of three-phasecycloconverters, a real-time control scheme is presented for the cycloconverter with sinusoidal output voltage.That is the microprocessor DDC system for three-phase cycloconverters.In the DDC system,the firing angles ofthyristors are determined by a modulation function.Based on this control method,a three-phase cycloconverterwith partial circulating current is completed.The experiment result shows that the control method is correct.