Natural circulating current control of a cycloconverter
| Autor: | A.J. Vandenput, Sjoerd Bosga, L.J.J. Offringa, Jorge L. Duarte |
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| Přispěvatelé: | Electromechanics and Power Electronics, Power Electronics Lab |
| Jazyk: | angličtina |
| Rok vydání: | 1993 |
| Předmět: | |
| Zdroj: | Proceedings Industry Applications Society Annual Meeting, Toronto, Ont. 2-8 Oct 1993, 1160-1165 STARTPAGE=1160;ENDPAGE=1165;TITLE=Proceedings Industry Applications Society Annual Meeting, Toronto, Ont. 2-8 Oct 1993 |
| Popis: | In order to perform experimental verifications of theoretical analyses and simulations related to field-oriented controlled AC drives, especially at low frequencies, a 20 kVA power converter was needed. This converter should act as a voltage amplifier, allowing the load current to change direction without discontinuities. For this purpose, a six-pulse cycloconverter with natural circulating current was chosen. A control strategy is introduced for this device which is based on the shape of the natural (uncontrolled) circulating current. Simulations show that, using this method, with a relatively simple control circuitry, the circulating current can be controlled in such a way that it never becomes zero. As a result, the load current is free to change direction without becoming discontinuous and without a dead zone, and the output voltage can be controlled independently of the load current. Practical experiments confirmed the theory and the simulations. > |
| Databáze: | OpenAIRE |
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