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Investigation and Reduction of Losses on Inverter-fed Induction Motors
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| Author(s) |
Khang HUYNH |
| Abstract |
An electric motor is more effective and flexible when supplied by a frequency converter. The frequency converter not only produces the fundamental voltage but also a set of higher harmonics which cause additional losses in the motor. Losses in the frequency converter are normally neglected in the drive dimensioning due to insufficient data available from manufacturers. Motor's losses can be reduced by increasing the switching frequency of frequency converters. An increase of the switching frequency may result in higher losses in the frequency converter. This work investigates analytically and experimentally the dependence of the losses of modern motor and frequency converter on a switching frequency and determines the switching frequency range which minimizes the total loss of inverter-fed motors. It was found during the experimental testing that the losses of a frequency converter are close to the motor losses at rated operating conditions and they become dominant when operating at lower speed and power although the converter and motor were dimensioned for the same rate power rating. |
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| Filename: | 0435-epe2017-full-14213549.pdf |
| Filesize: | 346.4 KB |
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| Type |
Members Only |
| Date |
Last modified 2018-04-17 by System |
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