Evaluation Methods for Incorporating Non-Deterministic Characteristics in PWM Strategy of Induction Motor Drives and FPGA Based Experimental Implementation

Journal of Electrical Engineering (2018)

9 Pages Posted: 14 Jun 2019

See all articles by Boselin Prabhu

Boselin Prabhu

VSB College of Engineering

Dr Jarin T

Jyothi Engineering College - Department of Electrical and Electronics Engineering

Date Written: June 4, 2018

Abstract

The primary advantages of non-deterministic pulse width modulation (PWM) strategies are that the harmonic power in the output voltage is spreaded over wider range in the frequency spectrum and does not get grouped at definite frequencies. This absence of distinct dominant harmonics results generally in reduction of acoustic noise and torque ripples in the drives. The effectiveness in acoustic noise reduction is contingent on how efficiently the non-deterministic characteristics (randomness) are being incorporated in the PWM strategy. This paper proposes two dissimilar approaches to integrate the randomness in the PWM suitable for induction motor drive. Primarily, a Pseudo Random Binary Sequence (PRBS) bit based random carrier PWM (RCPWM) is deliberated. Then, a comprehensive investigation of performance of random pulse position pulse width modulation (RPPPWM) is worked out. A comprehensive simulation study on performance characteristics such as harmonic spectrum, total harmonic distortion (THD), harmonic spread factor (HSF) and power density spectrum, are presented for conventional sinusoidal PWM (SPWM), RCPWM and RPPPWM. The results are validated through the prototype VSI designed. The implemented pulse width modulators using a SPARTAN-6 field programmable gate array (FPGA) (XC6SLX45) device corroborate the simulation study and hint the triumphing one.

Suggested Citation

Prabhu, S.R.Boselin and T, Dr Jarin, Evaluation Methods for Incorporating Non-Deterministic Characteristics in PWM Strategy of Induction Motor Drives and FPGA Based Experimental Implementation (June 4, 2018). Journal of Electrical Engineering (2018) . Available at SSRN: https://ssrn.com/abstract=3398745

S.R.Boselin Prabhu

VSB College of Engineering ( email )

Coimbatore, Tamil Nadu
India

Dr Jarin T (Contact Author)

Jyothi Engineering College - Department of Electrical and Electronics Engineering ( email )

Jyothi Hills, Panjal Road
Vettikattiri PO, Cheruthuruthy
Thrissur, Kerala 679531
India
9626623332 (Phone)

HOME PAGE: http://www.jecc.ac.in

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