Optimal pulse width modulation of voltage-source inverter fed motor drives with relaxation of quarter wave symmetry condition

Author

Tripathi, Anand ; Narayanan, G.

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Sci., Bangalore, India

fYear

2014

fDate

6-7 Jan. 2014

Firstpage

1

Lastpage

6

Abstract

Optimal switching angles for minimization of total harmonic distortion of line current (I_THD) in a voltage source inverter are determined traditionally by imposing half-wave symmetry (HWS) and quarter-wave symmetry (QWS) conditions on the pulse width modulated waveform. This paper investigates optimal switching angles with QWS relaxed. Relaxing QWS expands the solution space and presents the possibility of improved solutions. The optimal solutions without QWS are shown here to outperform the optimal solutions with QWS over a range of modulation index (M) between 0.82 and 0.94 for a switching frequency to fundamental frequency ratio of 5. Theoretical and experimental results are presented on a 2.3kW induction motor drive.

Keywords

PWM invertors; harmonic distortion; induction motor drives; HWS; QWS; half-wave symmetry; induction motor drive; optimal pulse width modulation; optimal switching angles; quarter wave symmetry condition; quarter-wave symmetry; switching angles; switching frequency; total harmonic distortion; voltage-source inverter fed motor drives; Harmonic analysis; Indexes; Inverters; Switches; Variable speed drives; Vectors; Vehicles; Harmonic analysis; harmonic distortion; induction motor drive; optimal pulse width modulation; voltage-source inverter; waveform symmetry;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Computing and Communication Technologies (IEEE CONECCT), 2014 IEEE International Conference on

Conference_Location

Bangalore

Print_ISBN

978-1-4799-2318-2

Type

conf

DOI

10.1109/CONECCT.2014.6740342

Filename

6740342