| Abstract |
As an effective means to reduce the acoustic magnetic noise and EMI, a novel random pulse width modulation (PWM) method based on normally distributed random data is proposed. In conventional random PWM method, the uniformly distributed random data is often used, so the peaks of harmonics are not sufficiently reduced yet. The aim of this novel random PWM method is to spread the frequency distribution of harmonics more flat by using the normally distributed random data. In this paper, the basic principle of this novel random PWM method is discussed and the analytical comparison with conventional random PWM methods is performed. Finally, the experimental results are illustrated. |
