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Author Halasz, S.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2009
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Space vector pulse width modulation ♦ Induction motors ♦ Pulse Width Modulation (PWM) ♦ Phase modulation ♦ induction motor ♦ Pulse width modulation ♦ Voltage control ♦ MATLAB ♦ Pulse width modulation inverters ♦ harmonics ♦ Switching frequency ♦ AC motors ♦ Stators ♦ Multiphase drive
Abstract Different types of discontinuous PWMs of multiphase inverter-fed ac motors are investigated from point of view of ac motor harmonic losses. The derived expressions for computation of the generalized loss-factors and its components are given for different phase number and for all the investigated PWM methods. It is shown that the discontinuous PWM of multiphase system cannot be as successful as that for the case of three-phase system. Therefore in comparison with continuous PWMs the discontinuous ones have no advantages in case of phase number more than 9. However, the stator harmonic current losses are slightly higher while the rotor harmonic current losses are considerably lower than those in case of three-phase system. At the same time for the phase number over 7 a sensible broadening of the linear voltage control region is impossible for any PWM method. The theoretical derived expressions for stator and rotor losses (derived for infinite value of switching frequency, MATCAD program) are checked by results of direct computation for a finite value of switching frequency (MATLAB program) as well by simulations.
Description Author affiliation: Budapest University of Technology, Egry J. u. 18, Budapest, Hungary (Halasz, S.)
ISBN 9781424444328
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2009-09-08
Publisher Place Spain
Size (in Bytes) 292.30 kB
Page Count 9
Starting Page 1
Ending Page 9

Source: IEEE Xplore Digital Library