| 摘要 |
<p>Communicating switching data in a control system controlling, for example, kilovolts at hundreds of amps, comprises a central controller 110 coupled to sub-controllers 120 and thence to a plurality of switching device controllers (SDs) 130, preferably in a tree-structure. Each SD controls a power semiconductor switching device 132, such as an IGBT. The method includes formatting switching control data as one or more switching control data packets comprising data for controlling switching of a combination of the devices, sending these from the central controller to the SDs. The SDs format state data representing states of the switching devices controlled in combination into a plurality of acknowledgement data packets, and sending these back to the central controller. The technique may be employed for controlling the synchronised switching of, potentially, tens, hundreds or thousands of power semiconductor switching devices. In an alternative method, fault data is combined with the state data representing states of the switching devices sent to the central controller, and a potential fault is detected by ORing together fault data bits.</p> |
