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Modeling and Comparison of Two Modified Vector Modulation Schemes with Feed-Forward for the Quasi-Single Stage Three-Phase Zero-Voltage Zero-Current Switched...
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| Author(s) |
C. Cuadros; S. Chandrasekaran; K. Wang; D. Boroyevich; F. C. Lee |
| Abstract |
A Large signal average model for the Quasi-Single Stage (QSS) Three-Phase Zero-Voltage Zero-Current (ZVZCS) Buck rectifier operated with two variations of Space Vector Modulation (SVM) is developed. The model reveals strong non-linear relations between applied and effective duty-cycles, near the 60° sector boundaries, which lead to high input current distortion and output voltage ripple inadmissible in telecommunications applications. PLL and look-up table based SVM, and analog filter inductor current and output voltage compensators are implemented to provide both minimum number of sampled variables (maximum sampling frequency and loop bandwith) and easy introduction of duty-cycle feed-forward compensation (equalization) through power series approximation. Results from a 6 kW prototype validate both the large signal model and duty-cycle compensation scheme. |
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| Filename: | EPE1999 - PP00718 - Cuadros.pdf |
| Filesize: | 1002 KB |
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| Type |
Members Only |
| Date |
Last modified 2004-03-25 by System |
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