Optimized selection of the random PWM switching frequencies in a limited pool

Author

Almarri, Khalid Ali ; Balda, Juan Carlos ; Carr, Ken

Author_Institution

Gen. Dept. of Planning, Dubai Police GHQ, Dubai, United Arab Emirates

Volume

1

fYear

2000

fDate

6/22/1905 12:00:00 AM

Firstpage

569

Abstract

A new and simple idea is presented to optimize the selection of the switching frequencies in a limited-pool random pulse width modulation (RPWM) technique. This idea makes use of a novel formula to: (a) select the small number of switching frequencies in the pool; and (b) provide a numerical value that serves as a “figure of merit” of the line-to-line voltage spectrum for comparing different PWM and RPWM techniques. The limited-pool RPWM is implemented in a Texas Instruments (TI) TMS320C240 Digital Signal Processor (DSP) controlling an inverter-driven three-phase induction motor (IM). The advantages of the proposed ideas are illustrated through an analysis of measurements of the line-to-line voltage and acoustic noise spectra

Keywords

DC-AC power convertors; PWM invertors; circuit optimisation; harmonic distortion; induction motors; power conversion harmonics; switching circuits; PWM inverter; TMS320C240 DSP; acoustic noise spectra measurements; figure of merit; limited pool; line-to-line voltage spectrum; optimized selection; random PWM switching frequencies; three-phase induction motor; voltage measurements; Acoustic measurements; Digital signal processing; Digital signal processors; Induction motors; Instruments; Process control; Pulse width modulation; Space vector pulse width modulation; Switching frequency; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2000. APEC 2000. Fifteenth Annual IEEE

Conference_Location

New Orleans, LA

Print_ISBN

0-7803-5864-3

Type

conf

DOI

10.1109/APEC.2000.826160

Filename

826160