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Chaos-Based Generation of PWM-Like Signals for Low-EMI Induction Motor Drives: Analysis and Experimental Results
Michele BALESTRA Alberto BELLINI Sergio CALLEGARI Riccardo ROVATTI Gianluca SETTI
IEICE TRANSACTIONS on Electronics
Publication Date: 2004/01/01
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electronic Circuits
switching power conversion, induction motor, PWM, EMI, FM, chaos,
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The reduction of undesired electromagnetic emissions in switched power converters is a hot topic. Here, we propose a chaos based methodology to synthesize PWM-like signals for controlling the drives of induction motors. This approach reduces drastically the interference due to the drive-motor ensemble, and does not significantly alter the motor performance. The benefit is a 20 dB reduction in the peak of the emitted power density spectrum. This result is herein confirmed three times: first with an analytical approach based on approximations whose impact is progressively reduced; then by means of simulation; finally by laboratory testing of a working prototype.