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Self Powering Driver Circuit For Series-Connected IGCTs
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| Author(s) |
R. Roesner; J. Holtz; R. Kennel |
| Abstract |
When applying series connection of power semiconductors in high voltage inverters the power supply of each driver circuit must usually be provided separately by transformers due to the different potential levels of the power devices. This paper presents a snubber scheme producing the supply voltage for the driver circuit on the same voltage level without external power supply. Remaining snubber energy is regenerated to the DC link of the inverter. Measuring results obtained from a real inverter setup with serial connected IGCTs show
that even during start-up operation it is not necessary to connect external power supplies to each driver circuit. Only a single driver circuit per inverter leg must be supplied by electrical power until its supply capacitors have been charged up. Afterwards the auxiliary power supply might be disconnected again as it is not
needed any more. |
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| Filename: | EPE2001 - PP01228 - Kennel.pdf |
| Filesize: | 356.3 KB |
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| Type |
Members Only |
| Date |
Last modified 2004-03-15 by System |
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