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Space Vector Based Synchronized PWM Algorithm for Three Level Voltage Source Inverters: Principles and Application to V/f Drives

Beig, Abdul Rahiman and Narayanan, G and Ranganathan, VT (2002) Space Vector Based Synchronized PWM Algorithm for Three Level Voltage Source Inverters: Principles and Application to V/f Drives. In: 2002 28th Annual Conference of the IEEE Industrial Electronics Society. IECON 02, 5-8 November, Spain, Vol.2, 1249-1254.


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This paper describes the synchronized PWM techniques based on space vector approach for three level voltage source inverters. The objective is to improve the output waveform of the inverters used in high power applications, where the switching frequency is very low. This is achieved by maintaining the synchronization and half wave symmetry, quarter wave symmetry, three-phase symmetry in the PWM waveforms. The principles of achieving synchronization and symmetries are presented. The proposed algorithm is implemented on TMS320F240 based digital controller and applied to V/f drive. The experimental waveforms of the inverter output voltage and motor no load current for different operating conditions of the drive are presented. The $V_{WTHD}$ of the line voltage and $I_{THD}$ of the no load current of the motor are computed from the experimental data. The performance measure in terms of the $V_{WTHD}$ of the line voltage is computed for the entire operating region of the drive for the proposed algorithm and the synchronized SPWM technique. The comparative results show that the proposed method has improved THD over SPWM method. Another significant feature of the proposed algorithm is that the symmetry and synchronization leads to self-balancing of the D.C. bus capacitor voltages.

Item Type: Conference Paper
Publisher: IEEE
Additional Information: Copyright 1990 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 24 Jan 2006
Last Modified: 19 Sep 2010 04:23
URI: http://eprints.iisc.ac.in/id/eprint/5184

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