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A high precision search coil is used for monitoring of the broken bars in the squirrel cage induction machines. The searches coils are implemented in a finite element model witch describe the real behavior of the machine. The external search coils are fixed on Ox and Oy axis for analyzing the leakage flux in the outer region. The method offer a number of advantages including compact size of the sensor,...
Finite element method is more precise than the winding function approach, as it is based on the actual geometry of the machine and the machine model can easily be modified in order to study the effect of faults on the machine's performance. Accurate models of the machine under healthy and faulty conditions are developed. This paper presents simulations of broken bars detection in a three phase squirrel...
The effects of magnet faults on the rotor of permanent magnet synchronous machines are analyzed in the present work. In particular, demagnetization effects are analyzed using the finite element method. Two different stator winding configurations are considered in the analysis, series and parallel connected windings. From this analysis, a fault detection strategy based on the information contained...
Resolver is widely used in electric drive system especially for hybrid electric vehicles (HEV). A resolver system includes not only a variable-reluctance resolver but also an excitation circuit, shielding cables and a resolver-to-digital (R/D) IC as a multi-physics system with electrical, magnetic, mechanical and control characteristics. This paper studies a resolver for HEV electric motor, and proposes...
This paper presents an accurate and reasonably complicated model to simulate the faulty induction machines. The proposed model is based on a permeance network method (PNM) and the differential equation system governing the induction machine behavior in presence of stator faults. The proposed model allows taking into account the saturation in magnetic circuit due to the fault currents as well as all...
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