Title :
Novel random PWM schemes with weighted switching decision
Author :
Hui, S.Y.R. ; Sathiakumar, S. ; Sung, Ki-Kwong
Author_Institution :
Sydney Univ., NSW, Australia
fDate :
11/1/1997 12:00:00 AM
Abstract :
A new random pulse-width modulation (RPWM) scheme, which includes a weighted decision switching process, has been developed and tested. The switching strategy can be applied to the entire range of the modulation index. The scheme combines the advantages of the deterministic nature of the standard pulse-width modulation (PWM) schemes, and the nondeterministic spread-spectral characteristic of RPWM schemes. Test results have confirmed the improved spectral performance of the proposed schemes over a standard RPWM scheme at both low- and high-modulation indexes
Keywords :
AC motor drives; PWM invertors; switching circuits; deterministic nature; drives; high-modulation index; inverter fed AC drives; low-modulation index; nondeterministic spread-spectral characteristic; power invertors; random pulse-width modulation; switching strategy; weighted switching decision; Acoustic noise; Acoustic pulses; Power system harmonics; Pulse inverters; Pulse width modulation; Pulse width modulation inverters; Random number generation; Space vector pulse width modulation; Switching frequency; Testing;
Journal_Title :
Power Electronics, IEEE Transactions on
