Study on longitudinal vibrations in turbomachinery coupled with skewed slotted bar cage induction motors

Finite Element Diagnosis of Squirrel Cage Induction Motors with Rotor Bar Faults

This paper deals with the finite element analysis of a specific fault of the squirrel cage induction motors consisting in rotor bars breaking. Several variants of rotor bar faults are studied, using both quasi-static and transient magnetic field analyses. The numerical results in the reference case of healthy motor are experimentally validated by laboratory measurements.

Off-the-grid compressive sensing for broken-rotor-bar fault detection in squirrel-cage induction motors

In this paper, we propose an off-the-grid compressive sensing based method to detect brokenbar fault in squirrel-cage induction motors. To validate our method, we first build a dynamic model of squirrel-cage induction motor using multi-loop equivalent circuit to simulate motor current under fault conditions. We then develop an off-the-grid compressive sensing algorithm to extract the fault char...

Electromagnetic forces in cage induction motors with rotor eccentricity

The paper deals with the electromagnetic forces in induction machines when the rotor is performing eccentric motion with respect to the stator. The studied eccentric motions of the rigid cage rotor are cylindrical circular whirling motion, symmetric conical whirling motion and the combination of these two basic modes of eccentric motions. The multi-slice, time stepping finite element analysis i...

Double-Cage Induction motors behavior under Flicker Conditions

Magnetic Saturation Impacts on Fault Analysis of Squirrel-Cage Induction Motors using Winding Function Approach

Multiple coupled circuit modeling of squirrel-cage induction motors, or winding function approach is the most detailed and complete analytical model used to analyze the performance of the faulty induction motors. This paper extends the above-mentioned model to a saturable model including variable degrees of the saturation effects using an appropriate air gap function and novel techniques for lo...