Stephane Rael

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In the area of natural gas industry, there is a large interest in converters for driving high speed, medium voltage induction motors. High-speed drive systems are capable of directly driving turbo-compressors at speeds of up to 20,000 rpm / 8MW. In high speed motor drive applications, the motor fundamental frequency can vary from 100Hz to 300Hz, which(More)
All electrochemical batteries are characterized by an electrical behavior which depends on temperature, state of charge and current. In the case of lithium-ion accumulators, the energetical behavior is moreover deeply marked by line effects, due to the porosity of both electrodes. This paper deals with investigations on accurate energetical modeling of(More)
In this paper, the authors propose a solution to provide self protection in a normally-On JFET voltage fed inverter. The solution is a plug-in to an existing Gate driver. An overview of JFET Gate driving serves as an introduction to the problem of self protection of inverters using Normally-On devices.
4H-SiC MOSFET have been fully characterized in the forward conduction over the temperature range -30°C to 150°C. The distinct characteristics of SiC MOSFET and the Si MOSFET counterpart are compared and explained. A physics-based analytical model for SiC MOSFET has been developed by using the MAST language and simulated with SABER. The(More)
The most important purpose of this work is to analyze the phenomenon of a fuel starvation of a PEM FC system. The incentive for automotive FC applications is quite different from that for stationary power generation or other applications. The dynamic characteristics of FC must be considered. Experimental results based on a PEMFC (500 W, 40 A) noticeably(More)
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