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Calculation Of Overvoltage And Losses In Three Level Inverters With Double Snubber Circuit
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| Author(s) |
Jamal Al Nasseir, Christian Weindl, Gerhard Herold |
| Abstract |
In this paper a new circuit design for the protection of
multi level inverter is presented. The so-called ‘Double Snubber
Circuit’ optimises the behaviour of conventional RCD snubber
circuits especially in the direction of the over voltage protection
and allows minimizing the total losses in the entire circuit
including the power semiconductors. The proposed circuit
overcomes hereby the limitations of many of the existing
designs, because the losses and the over voltage can be
controlled using only a handful of additional passive elements.
Because of the high efficiency of the inverter systems based on
the proposed snubber circuit, it can be used for high power
inverters as well as for the so-called Flexible AC Transmission
Systems (FACTS). The presented snubber circuit has been
analysed in several test configurations and converter designs.
The simulation results are compared with the output of a
standardized three level inverter system to verify the
opportunities of the new snubber design. |
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| Filename: | A24179 |
| Filesize: | 310 KB |
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| Type |
Members Only |
| Date |
Last modified 2006-02-15 by System |
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