Title :
Easing EMC problems in switched mode power converters by random modulation of the PWM carrier frequency
Author :
Stone, D.A. ; Chambers, B. ; Howe, D.
Author_Institution :
Dept. of Electron. & Electr. Eng., Sheffield Univ., UK
Abstract :
This paper presents a method of reducing the measured amplitude of the high frequency harmonics, contained in standard fixed frequency PWM, by the use of a pseudorandom binary sequence to modulate the PWM carrier frequency, achieving a spread spectrum effect on the EMC spectrum of the system
Keywords :
PWM power convertors; binary sequences; electromagnetic compatibility; power system harmonics; switched mode power supplies; EMC spectrum; PWM carrier frequency; high frequency harmonics; measured amplitude reduction; pseudorandom binary sequence; random modulation; spread spectrum effect; standard fixed frequency PWM; switched mode power converters; Attenuation; Electromagnetic compatibility; Frequency; Power harmonic filters; Power system harmonics; Pulse width modulation; Pulse width modulation converters; Spread spectrum communication; Switched-mode power supply; Switching converters;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1996. APEC '96. Conference Proceedings 1996., Eleventh Annual
Conference_Location :
San Jose, CA
Print_ISBN :
0-7803-3044-7
DOI :
10.1109/APEC.1996.500462
