自然换流AC/AC变频控制器数字化实现方法

A Digital Method for AC/AC Converter Controller by Natural-commutation

针对AC/AC变频电路存在的换流死区问题,提出了一种AC/AC变频控制器软、硬件设计方法。该方法中6路触发脉冲均由DSP生成,完成对系统的全数字化控制。通过DSP中两个定时器的合理使用,实现了AC/AC变频器的自然换流,减小了换流死区对输出波形的影响。实验结果表明,所设计的AC/AC变频数字控制系统具有较高的控制精度和较好的控制效果。

For the dead band in AC/AC converter controller,a design method of both software and hardware is pre-sented.All the trigger pulses are created by DSP.The full digitalization of the system is completed.The self-commu-tation of the controller is achieved by intelligent utilization of two timers of DSP.The dead band of commutation is greatly reduced.The quality of output waveform is improved observably.The experimental result verify the outstanding effectiveness and precision of the controller.