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Low Speed Sensorless Control of an Induction Motor Fed by Multilevel Converter to Reduce Current Distortion
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| Author(s) |
KAMEL SALEH, Mark SUMNER, Greg ASHER, Qiang GAO, MATTEO TOMASINI |
| Abstract |
The paper introduces a new scheme to track the rotor position of an induction motor. The scheme uses the measurement of current derivatives during null switching vectors of a standard PWM scheme and reduces the minimum pulse widths required to allow high frequency switching oscillations to die down. The motor current distortion is therefore also reduced. The method uses H-Bridges connected in series with the main converter. This configuration has the same characteristics as the multilevel converters proposed for high power induction motor drives. The H-Bridges can be used to produce low voltage test vectors during the null vector which can provide a good rotor position estimation with very low additional current distortion. The paper will present experimental results which show the potential capability for sensorless speed control. |
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| Filename: | 0703-epe2009-full-13421859.pdf |
| Filesize: | 385.8 KB |
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| Type |
Members Only |
| Date |
Last modified 2010-01-27 by System |
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