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In this paper, a comprehensive behavioral efficiency model of an electric motor drive system is proposed. The proposed model includes all possible motor drive losses without ignoring, approximating or assuming any of the inverter or machine losses, which are usually done for other efficiency models, hence the model is comprehensive. The input (DC electrical) and the output (mechanical) power of the...
This paper presents a threshold-based approach for power grid fault diagnosis in a power system based on correlation between fault types and basic measurements. The main focus is on faults that may occur on transmission and distribution lines due to uncontrolled events. The proposed method utilizes simple voltage and current measurements in transmission lines to extract divergence of these measurements...
This paper presents a method employing a simple three-phase transformer connected to a three-phase AC variable load for emulating a standard three phase AC induction motor. Such an emulator could be used for variable frequency drive testing but eliminates any moving parts for higher reliability, reduces audible noise, and eliminates high-cost dynamometers. The method utilizes the concept of assuming...
This paper presents a combinational-logic-based approach for identifying faults that could occur in power electronic components of an electric vehicle inverter. A real-time simulation model of an electric vehicle is used to study the behavior of available sensor signals and control commands, with specific measured quantities, during vehicle operation. Those quantities could be, but are not limited...
This paper presents a combinational-logic-based approach for identifying faults that could occur in the drivetrain of an electric vehicle (EV). A real-time simulation model of an EV is used to study the behavior of available sensor signals and control commands, with specific measured quantities, during vehicle operation. Those quantities could be, but are not limited to, mean values of the phase currents,...
This paper presents a fuzzy-logic approach for fault diagnosis in a plug-in hybrid electric vehicle (PHEV) or electric vehicle (EV) charger. The approach correlates faults and basic measurements then utilizes fuzzy logic to diagnose a fault. Redundancy is engaged as needed based on the fuzzy logic decision. Experimental validation is first shown for the converter model. Then, a fuzzy system is developed...
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