Implementation Of Chaotic PWM in Converter For Suppression of Conducting EMI Using Orcad Software
Implementation Of Chaotic PWM in Converter For Suppression of Conducting EMI Using Orcad Software
Neeraj Priyadarshi, Patna, Bihar-800001
Department of Electrical Engineering, CTAE, Udaipur (Rajasthan)
ABSTRACT ELECTRO-MAGNETIC Interference (EMl) emission is always of grave concern for power electronic circuit designers. Due to rapid switching of high current and high voltage, interference emission is a serious problem in switching power circuits. Many products fail to make it to the market because of their failure to comply with the government EMI regulations. Numerous companies have cited EMI problems as the culprit in the delay of their product introduction; a new chaotic pulse width modulation (PWM) scheme is proposed and implemented to reduce the conducted electromagnetic interference (EMI) in power converters.Based on the analysis of constant frequency, Experiments have been made on an power converter. The experiment results show that the EMI spectrum is decided completely by the PWM spectrum, and the chaotic frequency-spreading has an obvious impact on EMI suppressing, compared with the other schemes. to chaoize a frequency-modulated signal which then modulates the carrier frequency. the proposed scheme not only suppresses the peaky EMI, but also avoids the occurrence of low-order noises and mechanical resonance