Shaping the Noise Spectrum in Power Electronic Converters

The operation of switch-mode converters results in electromagnetic noise propagating throughout the power electronic system. Pulsewidth modulation (PWM) strategies with fixed switching frequency generate harmonics in the spectra of converter voltages and currents. Random PWM techniques allow the eli...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2011-07, Vol.58 (7), p.2780-2788
Main Authors: Kirlin, R L, Lascu, C, Trzynadlowski, A M
Format: Article
Language:English
Subjects:
Channels
Communication systems
Converters
Electronics
Frequency modulation
Harmonics
Inverters
Noise
Power electronic converters
Pulse duration modulation
Pulse width modulation
pulsewidth modulation (PWM)
Spectra
spectral analysis
Switches
Switching frequency
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Summary:The operation of switch-mode converters results in electromagnetic noise propagating throughout the power electronic system. Pulsewidth modulation (PWM) strategies with fixed switching frequency generate harmonics in the spectra of converter voltages and currents. Random PWM techniques allow the elimination of the harmonics, resulting in a continuous spectrum of noise, i.e., a spectrum retaining all frequency components. As a next step in advanced spectral shaping, a method presented in this paper produces spectral nulls at selected frequencies. This allows the carving of communication channels in the noise and the removal of spectral power at frequencies potentially harmful for the system. The theoretical analysis, computer simulations, implementation details, and experimental results are presented.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2010.2076417