Methods for Varying Speed in Squirrel Cage Induction Motors: A Review

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Research areas:
Year:
2013
Type of Publication:
Article
Keywords:
Induction Motor, Space Vector Method, Pulse Width Modulation, Direct Torque Control, IGBT, Inverter
Authors:
S. Ananthi; K. Padmanabhan; R. Gowri Shankar Rao
Journal:
IJAIM
Volume:
1
Number:
5
Pages:
103-113
Month:
March
ISSN:
2320-5121
Abstract:
Power Electronics has made possible motor drive schemes which were felt impossible during the last decade. Today, an Induction Motor can be run at any speed by using an inverter. Almost all methods employ the pulse width modulation principle. There is a 3 phase sinusoidal modulation method, a so called "Space vector" method and yet another method which is claimed to be a "Direct Torque Control". These methods have been popularized by power electronics people without much consideration about the motor itself. Presently, these schemes are utilizing the power of Digital Signal Processing controllers to do the switching. Insulated Gate bipolar power transistors are invariably employed. There are frequent failures of these devices due to shorting of the D.C. supply lines. There are other problems as well such as induced switching transients, bearing currents and failure of motor winding. Thus, there are problems yet to be sorted out. This review gives a full account of the methods and discusses the problems underlying their use, along with some suggestions.
Full text: IJAIM_97_Final.pdf

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