基于CPLD多路移相触发器的研究

针对多路输出整流电源系统在进行数字控制设计时因触发脉冲多而引起的资源＂瓶颈＂,文章介绍了一种应用于多路三相晶闸管整流电路的数字移相触发电路。以CPLD为核心,采用可预置数计数器,通过总线锁存器对多路三相半波触发脉冲进行控制,产生多组三相脉宽可调的触发脉冲。输出脉冲稳定性好,可靠性高;不需要同步变压器,可实现相序自适应。对多路触发脉冲的整流电源设计有一定的参考价值。

Research of multi-output digital phase-shifted trigger based on CPLD

Aiming at solving the resource bottleneck of multi-output rectification circuit in the process of the digital control design because of too much trigger pulso,the paper introduces a digital phase-shifted trigger circuit which can be used in the multi-output three-phase thyristor rectification circuit.The circuit works with the CPLD as the core and uses prepared counter with bus latch to control the trigger pulses.The circuit produces multi-output with high stable and dependable trigger pulses which can be controlled.Meanwhile,it does not need the synchronizing transformers and the self-adapting function of phase sequence can be realized.It is useful for various designs on rectification supplies of multi-output trigger pulses.