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This paper presents an approach to diagnose batteries with the help of microcontroller and smartphone. It aims to determine the available capacity, the state of charge (SoC) and the state of health (SoH) of a battery. A battery is aged by charging and discharging cycles, this process degrades the chemical composition of the battery. Thus, this paper aims at using two-pulse test to determine Ampere...
Maximum efficiency of induction generators is a significant issue of renewable energy applications since resource is limited and sometimes because of expensive technology. This paper presents a modeling method of iron, copper and mechanical losses in an induction machine based on the design of experiments and Taguchi orthogonal plans. The model involves several parameters such as rotor speed (slip),...
This paper presents modeling, simulation and experimental results of a three phase induction motor running as single phase generator. Modeling is performed on a small power induction motor with squirrel cage, one phase for excitation and the others for load supply It includes a new model of the total losses, i.e. mechanical, copper and iron losses thanks to the design of experiment method (DoE). Experimental...
This paper examines the detection of mechanical load faults in induction motors during speed transients by stator current analysis. Mechanical load faults generally lead to load torque oscillations at specific frequencies. these frequencies are related to the mechanical rotor speed. The torque oscillations produce a characteristic sinusoidal phase modulation of the stator current. Speed transients...
This paper examines the detection of mechanical faults in induction motors by stator current analysis. Mechanical faults lead generally to periodic load torque oscillations. The influence of the torque oscillations on the induction motor stator current is studied. The mechanical fault results in a sinusoidal phase modulations of the stator current. Based on these assumptions, several signal processing...
A substantial portion of squirrel cage induction motor faults are stator related. An accurate transient model of squirrel cage induction machines under stator faults is presented here. A coupled magnetic circuits approach is used and very few restrictive assumptions are made. All parameters are calculated from the actual geometry and winding layout of the machines rather than from transformed or equivalent...
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