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A new fault diagnostic parameter, applied to switched reluctance motor drives, is presented. The proposed parameter is a partial average power based on the power converter supply current and the rotor mechanical position information. At high speed operating conditions phase current is not regulated and the machine closed-loop control only needs to observe one current, which is the power converter...
A polar chart of the power converter supply current, comprising phase currents and rotor mechanical position information, is presented, in order to characterize the dynamic operation of a SRM drive. Power converter supply current can be used as additional information of extreme importance when a sensor error or failure occurs. Its analysis is then important and permits to develop appropriate fault...
This paper presents a very simple technique that can be used to estimate the capacitors equivalent series resistance (ESR) at their operating conditions. Aluminum electrolytic capacitors are one of the most critical components in switch mode power supplies and in adjustable speed drives; yet, they are the preferred choice in those applications. The ESR changes considerably with frequency, temperature...
The aim of this paper is to present a fault simulation technique that could help engineers to study the consequences of faults in the output filter of a switch mode power supply. To do so, in this paper, it is presented two techniques: a new experimental off-line technique based in the DFT algorithmic, which can determine the equivalent circuit of capacitors at the operating frequency of the converter,...
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