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A Hybrid Multi-Converter System Combining Single-Phase Converters with Three-Phase Converters
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| Author(s) |
YOSHIDA Takatsugu; FUKUDA Shoji |
| Abstract |
A new hybrid multilevel multi-converter system combining three single-phase GTO converters with a three-phase NPC IGBT converter is proposed. The GTO converters can adjust the output voltage, though they operate in square-wave switching to minimize the switching-related device losses. The IGBT converter not only cancels the harmonic voltages generated by the GTO converters but also controls the resultant output voltage. The system can accomplish a wider adjustable output voltage range compared with other hybrid systems. A control strategy in relation to a required reference voltage is proposed to obtain minimum harmonic distortion in the resultant output voltage. A 1.5kW prototype is built and experimental results verify the validity of the proposed system and control strategy. Comparative studies on hybrid converter system performance with a different number of GTO converters are also included. |
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| Filename: | 0111 |
| Filesize: | 752.3 KB |
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| Type |
Members Only |
| Date |
Last modified 2006-02-05 by System |
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