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Synchronous Communication Link for IGBT Gate Driver Units
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| Author(s) |
T. Kjellqvist |
| Abstract |
New inverter topologies and series connection of IGBTs require more intelligent gate drivers and faster communication links. Also, higher voltages require better electrical
insulation and the communication distance increase. Most gate
diver units utilize some kind of asynchronous communication
protocol where the length of the pulse is varied to distinguish
between different symbols on the link. The communication protocol is easily implemented in discrete logic. Using a synchronous
protocol allow for an increased number of messages and a shorter latency since timing is improved compared to any asynchronous protocol. Alternatively, system frequency can be reduced and thereby reducing power consumption. In some
applications programmable logic is already present due to the need of sophisticated control of the device and more complex communication protocol can be implemented with a limited amount of extra hardware. The link can easily be used for low
speed communication in parallel to the modulation signaling. This low speed channel can be used for configuration of the gate driver or communicating chip temperature to the modulator. |
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| Filename: | Unnamed file |
| Filesize: | 147.4 KB |
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| Type |
Members Only |
| Date |
Last modified 2006-01-24 by System |
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