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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 new double stochastic pulse modulation technique is provided, which can reduce the conducted electromagnetic interference in the power electronics system. This modulation technique is achieved by changing the switching frequency and the rising edge position of the pulse at the same time. Compared with any single stochastic scheme that already exists, double stochastic modulation technology disperses the harmonic energy and makes it have wider bandwidth, can reduce the discrete spectrum peak value of the power converter system more effectively. The technology of double random PWM modulation signal based on Mitsubishi digital signal processor and its experimental results are given.