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Efficiency-optimal operating conditions for single-phase induction motors Cummings, Gerald Floyd

Abstract

The double-revolving field model is used to determine theoretically efficiencyoptimal operating conditions for single-phase induction motors equipped with an auxiliary winding. The algorithm developed determines the optimal values of main winding current, auxiliary winding current and stator frequency for any desired combination of torque and rotor speed within the motor's ratings. Computer simulations are presented to validate theoretical results and relate optimal terminal voltages to computed winding currents. Experimental measurements made on a 2 pole, 1 hp, 230V submersible motor are compared with computer simulations. These measurements reveal that while it is most important to control core losses by matching the V/Hz ratio to the load, it is possible to make further efficiency improvements by exciting the auxiliary winding.

Item Metadata

Title
Efficiency-optimal operating conditions for single-phase induction motors
Creator
Cummings, Gerald Floyd
Publisher
University of British Columbia
Date Issued
1995
Description
The double-revolving field model is used to determine theoretically efficiencyoptimal operating conditions for single-phase induction motors equipped with an auxiliary winding. The algorithm developed determines the optimal values of main winding current, auxiliary winding current and stator frequency for any desired combination of torque and rotor speed within the motor's ratings. Computer simulations are presented to validate theoretical results and relate optimal terminal voltages to computed winding currents. Experimental measurements made on a 2 pole, 1 hp, 230V submersible motor are compared with computer simulations. These measurements reveal that while it is most important to control core losses by matching the V/Hz ratio to the load, it is possible to make further efficiency improvements by exciting the auxiliary winding.
Extent
2441395 bytes
Genre
Thesis/Dissertation
Type
Text
File Format
application/pdf
Language
eng
Date Available
2009-01-14
Provider
Vancouver : University of British Columbia Library
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
DOI
10.14288/1.0064836
URI
http://hdl.handle.net/2429/3643
Degree
Master of Applied Science - MASc
Program
Electrical and Computer Engineering
Affiliation
Applied Science, Faculty of; Electrical and Computer Engineering, Department of
Degree Grantor
University of British Columbia
Graduation Date
1995-05
Campus
UBCV
Scholarly Level
Graduate
Aggregated Source Repository
DSpace

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For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.