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MICROCOMPUTER CONTROLLED CYCLOCONVERTER WITH REDUCED REACTIVE POWER
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| Author(s) |
P. Schwarz |
| Abstract |
A cycloconverter drive is presented that consists of three line-commutated six-pulse bridge-converters feeding a three-phase synchronous motor. The open-loop firing control of the converters as well as the closed-loop current control are executed by means of a multi-microcomputer system. As the starpoints of the cycloconverter and of the motor are not connected, a zero voltage component may be added to the output voltages of the cycloconverter. It may be utilized to reduce the fundamental wave reactive power demand of the drive. A new reactive power saving control strategy is introduced and theoretically analysed in comparison with some already known concepts. Finally three selected control strategies are implemented in a laboratory drive and metrologically researched. The results are compared with those of the theoretical analysis. |
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| Filename: | Unnamed file |
| Filesize: | 3.814 MB |
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| Type |
Members Only |
| Date |
Last modified 2021-02-25 by System |
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