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An Active Filter for Eliminating Harmonics and Interharmonics in the Input Current to an AC Voltage Controller for Refrigeration and Air-conditioning Applicatio
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| Author(s) |
SHAMMAS Noel; TENNAKOON Sarath; JODEYRI Hassan; LEHAL Tarinderjit |
| Abstract |
Energy saving motor controllers for refrigeration and air-conditioning applications operate at the minimum input power point by finding the optimum firing angle of the thyristors in the motor controller. Consequently, the distorted input current contains harmonics, sub-harmonics, and interharmonics whose frequencies change with the motor speed. Therefore passive filters are not suitable and the best solution is to use an active filter. A single phase active filter with simple constant frequency switching is able to reduce waveform distortion by eliminating a sufficient range of frequencies and offers a low cost solution. Theoretical analysis of the full-bridge and half-bridge topologies led to the development of design equations and curves. Simulation of a half-bridge active filter confirmed the design equations |
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| Filename: | 0231 |
| Filesize: | 272.1 KB |
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| Type |
Members Only |
| Date |
Last modified 2006-02-05 by System |
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