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CONTROL OF A SHAFT-SENSORLESS POSITION INDUCTION MOTOR USING AN ASYMMETRIC OUTER-SECTION CAGE
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| Author(s) |
J. Cilia; G. M. Asher; K. J. Bradley; M. Sumner |
| Abstract |
This paper describes a method of obtaining a rotor position signal from a cage induction machine operating without a mechanical shaft-sensor and reviews the vector control schemes suitable for position control. The position detection is based on introducing a circumferential variation in the resistance of a high resistance outer section cage of an induction machine rotor. The paper describes an
implementation of the method for a 30kW double cage machine having variable gauge copper wire in the outer slots. It is shown that the present degree of asymmetry in the cage resistance results in position
control up to 50% load before non-linear saturation effects degrade control performance. Increasing
asymmetry is possible but consideration must be given to the presence of asymmetry-induced torque
ripple. The paper describes vector control schemes to reduce the torque ripple and discusses the research required for a complete engineering solution. |
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| Filename: | Unnamed file |
| Filesize: | 527.4 KB |
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| Type |
Members Only |
| Date |
Last modified 2016-02-22 by System |
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