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A NEW MICROCOMPUTER BASED A.C. TO A.C. DIRECT FREQUENCY CONVERSION METHOD
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| Author(s) |
M. Aktekin |
| Abstract |
This paper proposes a new a.c. to a.c. direct frequency conversion method. The proposed method depends on a microcomputer based intelligent switching of the line phases. The method gives good harmonic suppression and very large frequency conversion range (e.g. 0 Hz. to 150Hz.) compared to the cycloconverters. The cycloconverters have a shortcome on their harmonic noise and conversion range. But, the method needs high frequency sampling from the three line phases with a complex phase selection algorithm. The method also requires fast and forced commutation circuits. Various phase selection algorithms have been tested by using an induction motor model in the simulation. The motor speed, torque and current waveforms and their harmonic analysis during start up time also are given for various conversion parameters. |
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| Filename: | Unnamed file |
| Filesize: | 3.842 MB |
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| Type |
Members Only |
| Date |
Last modified 2021-03-12 by System |
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