Title :
Current measurement using switch voltage drop in IGBT DC circuit breaker application
Author :
Tian, X. ; Moussanet, R.
Author_Institution :
Res. Centre A2, Merlin Gerin, France
Abstract :
Electrical systems using solid-state devices and controlled by computer are being developed. The new architecture opens up possibilities of measuring current. In static DC circuit breaker, the current measurement can be carried out by means of switch voltage drop rather than other classical methods. This paper describes the design and the test results of this measuring principle in an IGBT DC circuit breaker. A computer along with an analogue circuit is used to estimate the IGBT junction temperature, to compensate the IGBT on-state characteristic drift, and then to compute the current from the voltage drop measurement. It is shown that such a design gives a good measure of precision in the current range of static circuit breaker applications
Keywords :
circuit breakers; electric current measurement; insulated gate bipolar transistors; power electronics; IGBT DC circuit breaker; IGBT junction temperature; current measurement; on-state characteristic drift; solid-state devices; switch voltage drop;
Conference_Titel :
Power Electronics and Applications, 1993., Fifth European Conference on
Conference_Location :
Brighton