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An asymmetric cascaded H-Bridge inverters for generating 12-sided polygonal space vector diagrams for Motor drives
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| Author(s) |
K Mathew; Chintan Patel; K Gopakumar; Anandarup Das; Rijil Ramchand |
| Abstract |
A new topology of asymmetric cascaded H-Bridge inverter is presented in this paper. It consists of two cascaded H-bridge cells per phase. They are fed from isolated dc sources having a dc bus ratio of 1:0.366. Out of many space vectors possible from this circuit, only those are chosen that lie on 12-sided polygons. Thus, the overall space vector diagram produced by this circuit consists of multiple numbers of 12-sided polygons. With a proper PWM timing calculations based
on these selected space vectors, it is possible to eliminate all the 6n ± 1, (n = odd) harmonics from the phase voltage under all operating conditions. The switching frequency of individual H-Bridge cells is also substantially low. Extensive experimental results have been presented in this paper to validate the proposed concept. |
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| Filesize: | 417.1 KB |
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| Type |
Members Only |
| Date |
Last modified 2011-11-17 by System |
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