DocumentCode :
1441817
Title :
Improved spectral performance of random PWM schemes with weighted switching decision
Author :
Shrivastava, Yash ; Sathiakumar, S. ; Hui, S. Y Ron
Author_Institution :
Dept. of Electr. Eng., Sydney Univ., NSW, Australia
Volume :
13
Issue :
6
fYear :
1998
fDate :
11/1/1998 12:00:00 AM
Firstpage :
1038
Lastpage :
1045
Abstract :
The authors present a statistical approach to the analysis of random pulsewidth modulation (RPWM) methods which generate PWM signals by comparing a reference modulating function with random numbers or signals. Such an approach is used to analyze and optimize a new weighted RPWM (WRPWM) method and also a standard trapezoidal RPWM method. The WRPWM scheme combines the advantages of the nondeterministic and deterministic PWM methods by adding some deterministic nature into the nondeterministic RPWM method. Both theoretical and experimental results confirm that the optimized WRPWM method has better spectral performance over the standard RPWM schemes and has attractive features such as the potential of third-harmonic boosting, reduced acoustic noise, and minimal low-order harmonics under an overmodulation condition for electronic drive applications
Keywords :
PWM power convertors; power conversion harmonics; statistical analysis; switching; PWM signals generation; deterministic PWM method; electronic drive applications; minimal low-order harmonics; nondeterministic PWM method; overmodulation condition; random PWM schemes; reduced acoustic noise; reference modulating function; spectral performance; statistical approach; third-harmonic boosting; trapezoidal RPWM method; weighted switching decision; Boosting; Optimization methods; Probability distribution; Pulse generation; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Sampling methods; Signal analysis; Space vector pulse width modulation;
fLanguage :
English
Journal_Title :
Power Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8993
Type :
jour
DOI :
10.1109/63.728331
Filename :
728331
Link To Document :
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