An improved sapce phasor based current hysteresis controller with reduced switching frequency variations using variable parabolic bands

Tekwani, PN and Kanchan, RS and Gopakumar, K (2007) An improved sapce phasor based current hysteresis controller with reduced switching frequency variations using variable parabolic bands. In: IEEE Transactions on Industrial Electronics, Oct. 2007, Ahmedabad.

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Abstract

A current error space phasor based simple hysteresis controller is proposed in this paper to control the switching frequency variation in two-level pulsewidth-modulation (PWM) inverter-fed induction motor (IM) drives. A parabolic boundary for the current error space phasor is suggested for the first time to obtain the switching frequency spectrum for output voltage with hysteresis controller similar to the constant switching frequency voltage-controlled space vector PWM-based IM drive. A novel concept of online variation of this parabolic boundary, which depends on the operating speed of motor, is presented. A generalized technique that determines the set of unique parabolic boundaries for a two-level inverter feeding any given induction motor is described. The sector change logic is self-adaptive and is capable of taking the drive up to the six-step mode if needed. Steady-state and transient performance of proposed controller is experimentally verified on a 3.7-kW IM drive in the entire speed range. Close resemblance of the simulation and experimental results is shown.

Item Type:	Conference Paper
Publisher:	IEEE
Additional Information:	Copyright 2007 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.
Keywords:	Current error space phasor;hysteresis controller;parabolic boundary;switching frequency variation control.
Department/Centre:	Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited:	11 Oct 2011 09:31
Last Modified:	11 Oct 2011 09:31
URI:	http://eprints.iisc.ac.in/id/eprint/41358

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