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Sensorless Double-Inverter-Fed Wound-Rotor Induction-Machine Drive

Poddar, Gautam and Ranganathan, VT (2006) Sensorless Double-Inverter-Fed Wound-Rotor Induction-Machine Drive. In: Ieee Transactions On Industrial Electronics, 53 (1). 86 -95.

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The basic operation of a wound-rotor induction-motor drive fed by inverters on the stator as well as the rotor side is discussed. Different modes of operations are defined and explained based on power flow on both the sides of the machine. The sensorless motor control scheme consists of V/f-type direct frequency control on one side, with either vector control or direct torque and flux control on the other side. The machine operates up to twice the rated speed in either direction, with full flux and torque, thereby producing up to twice the rated power. Novel frequency profiles are proposed, which ensure that the frequency on either side never drops below a minimum value (set at 12 Hz in this work). Therefore, the estimation of flux can be simply and reliably carried out by integration of voltage, resulting in simple sensorless control. The drive works reliably at all speeds including zero speed and at all loads. Results from a 50-hp prototype drive are presented.

Item Type: Journal Article
Publication: Ieee Transactions On Industrial Electronics
Publisher: Ieee-Inst Electrical Electronics Engineers Inc
Additional Information: Copyright of this article belongs to Ieee-Inst Electrical Electronics Engineers Inc.
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 09 Apr 2009 05:12
Last Modified: 19 Sep 2010 04:59
URI: http://eprints.iisc.ac.in/id/eprint/17936

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