Single to three phase conversion for motor drives

Latif, M., 1992. Single to three phase conversion for motor drives. MPhil, Nottingham Trent University.

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The object of this research is to investigate the operation of a 3-phase induction motor, on as near a balanced 3-phase supply as possible, obtained from a single-phase source. This was achieved by studying previous research on a phase conversion by static and rotary converters. Fundamental theory of phase conversion was investigated and applied to a single and double element phase converter.

The precise phase balance component parameters were used over the full motor slip range and justified experimentally by laboratory tests. A computer programme, valid for any induction motor for which the running light and locked- rotor test results are known, was developed. The motor can be either Delta or Star connected. The programme was further developed into a user friendly software package. The package works out the values of the equivalent circuit parameters, from the results of the stator resistance test, no-load test and locked rotor test. The computer program goes on to draw the equivalent circuit showing parameter values and plots a graph of capacitance against slip.

A switched capacitor static phase converter with single or double element phase balance components with both capacitance and inductance was designed. A comparison of the various converter combinations was made and the control of these converters by manual and electronic means was investigated.

Using the balance criteria, a power-electronic transient phase converter was designed and constructed to balance at all working slips, for any motor, within a specified range.

A critical survey of the results achieved was projected into future work proposals using gate turn-off (GTO) thyristors (Appendix E). Computer aided design of application specific integrated circuits (ASICS) for the power device switching can greatly simplify the gate circuitry of the transient phase converter (Appendix D).

Item Type: Thesis
Description: In collaboration with Cuel Ltd., Kenilworth.
Creators: Latif, M.
Date: 1992
ISBN: 9781369324549
Rights: The copyright of this thesis belongs to the author.
Divisions: Schools > School of Science and Technology
Record created by: Linda Sullivan
Date Added: 16 Jun 2021 15:04
Last Modified: 17 Oct 2023 14:03

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