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The traditional pulse-width modulation has been widely applied to the electronic and electric device in power system. However, the unexpected harmonics produce much electromagnetic noise which causes torque ripple, mechanical resonance and acoustic noise. By analyzing the harmonics theory of the traditional pulse-width modulation (PWM), a random switching frequency pulse-width modulation (RSFPWM)...
In many aspects, harmonics will cause a series of problems such as electromagnetic interference (EMI), mechanical vibration and harsh noise. Especially when the amplitude of harmonics is high, more serious problem will arise. For these reasons, this paper has made an analysis of the theory of random carrier modulation and presented a practical random carrier modulation technique which is applied to...
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