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OPTIMUM DIODE-SWITCHED ACTIVE FILTERS FOR POWER FACTOR CORRECTION OF SINGLE- AND THREE-PHASE DIODE RECTIFIERS WITH CAPACITIVE SMOOTHING
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| Author(s) |
Vello Sarv; Tiiu Sakkos; Jüri Soojärv |
| Abstract |
A novel design principle and optimum schemes of low-distorting single- and three-phase diode rectifiers with capacitive smoothing using diode-switched-inductor and diode-switched-transformer active filters are proposed
and analyzed. The power factor correction technique proposed is based on the second-harmonic power conversion in single-phase rectifiers and the third-harmonic power conversion in three-phase rectifiers to an additional quantity of dc power in the active filter. More precisely, such a conversion takes place in an appropriate controlled current source implemented by a current-shaping time-variable inductor or transformer. To implement diode rectifiers with sinusoidal supply currents, continuous inductance or transformation ratio variation is needed. Nevertheless, a proper stepped variation of the filter inductance or that of the transformation ratio enables to synthesize diode rectifiers with high power factor using only the simplest diode switches. |
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| Filename: | Unnamed file |
| Filesize: | 583.5 KB |
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| Type |
Members Only |
| Date |
Last modified 2016-03-09 by System |
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