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Performance Evaluation and Experimental Validation of Random Pulse Position Pwm for Industrial Drives

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Document pages: 10 pages

Abstract: Random pulse width modulation (RPWM) in industrial drives is triumph in transferring of harmonic power from the detached spectrum of the output voltage to the unremitting spectrum and offers the merits viz. the operation free from an unpleasant acoustic noise and a mechanical vibration. The prime objective of this paper is providing a comprehensive investigation of performance of random pulse position pulse width modulation (RPPPWM) in a three phase voltage source inverter (VSI) fed induction motor drive through simulation and laboratory testing. RPPWM scheme randomly varies the pulse position in every switching cycle, where the idea is inducing the random characteristics in the PWM pulses at fixed switching frequency. The competence in spreading the harmonic power of sinusoidal PWM (SPWM), random carrier PWM (RCPWM) and the RPPWM are compared using simulation. The results are corroborated through the prototype VSI designed. The developed RPPPWM based on a SPARTAN-6 FPGA (XC6SLX45) device, disperses the acoustic switching noise spectra of an induction motor drive.

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