一种基于FPGA的PWM防错输出控制电路

FPGA Based PWM Error-prevention Control Circuit

随着电力电子技术与航空工业的发展和进步,脉冲宽度调制技术(Pulse-Width Modulation,以下简称PWM)越来越多的用于机载设备的控制中。比如步进电机阀的控制、风机的无极调速、灯光的照明调节等。文章根据目前PWM控制波形输出波形完整及准确的要求,提出了一种基于FPGA的择时更新PWM输出控制参数的策略,可有效避免控制参数改变过程中导致PWM输出波形产生的抖动及错误。

With the development and progress of power electronic technology and aviation industry,the Pulse-Width Modulation technology is widely used in the control of onboard devices,such as the step motor valve controlling,stepless speed regulation of fan,adjustment for illumination and so on.According to the demand of integrity and accuracy for PWM output waves,this paper comes up with a FPGA based PWM output control strategy which is able to update the PWM control parameters at the right moment,effectively preventing the jitters and errors in the PWM output waves during the control parameter transitions.