基于DSP实现的通用双随机PWM方案(英文)

Based on DSP Implement an Universal Dual Randomized PWM Schemes

提供了一种新的双随机脉冲调制技术,它能够很好地减小电力电子系统中存在的传导电磁干扰,这个调制技术是通过同时改变开关频率和脉冲的上升沿位置来实现的。与已经存在的任何一种单随机方案相比,双随机调制技术驱散谐波能量而使之具有更宽的带宽,能更加有效地减少功率变换器系统的离散谱峰值。给出了基于三菱数字信号处理器实现双随机PWM调制信号的技术及其实验结果。

A novel dual randomized PWM modulator with synchronous varying switching frequency and pulse position delay is proposed to reduce conducted electromagnetic interference (EMI) in power converters. Dual randomized modulation technique is more effective than existing simple random modulation schemes, such as random position modulation or random switching frequency modulation, in dispersing the power spectrum. Realization of the modulator controller using the Mitsubishi's M16C/62 DSP controller is described; and the results of experiments are presented.