M.Ing. (Electrical and Electronic Engineering) / This thesis covers the development of the Mosmatrix, a high speed, high power switch which is implemented with an array of mosfet switching elements. The switching performance of the Mosmatrix proves that is is possible to employ existing semiconductor technology to switch pulses of 1,5 Joule, several hundred Ampere at several kilovolt, in the microsecond and sub-microsecond regime. The switch has demonstrated rates of current rise in the order of lOkA per J.1s during tumon without the use of tum-on snubbers (magnetic assist) . The rate of current fall during tum-off has been of the same magnitude. No other switch has demonstrated this level of repetitive current interrupt ability. The work covers the properties, switching requirements anc' switching performance of mosfet switching elements as well as the development of an isolated drive circuit.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:uj/uj:4192 |
| Date | 20 February 2014 |
| Creators | Vorster, Adriaan |
| Source Sets | South African National ETD Portal |
| Detected Language | English |
| Type | Thesis |
| Rights | University of Johannesburg |
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