Discriminating rotor cage faults and mechanical load oscillations in three-phase induction motors by the stator instantaneous complex apparent impedance

2012 ◽  
Author(s):  
M'hamed Drif ◽  
Jorge O. Estima ◽  
A. J. Marques Cardoso
Keyword(s):  
Induction Motors ◽  
Mechanical Load ◽  
Three Phase ◽  
Rotor Cage

Rotor cage fault diagnosis in three-phase induction motors based on a current and virtual flux approach

2009 ◽  
Vol 50 (4) ◽  
pp. 1026-1032 ◽  
Author(s):  
Dulce F. Pires ◽  
V. Fernão Pires ◽  
J.F. Martins ◽  
A.J. Pires
Keyword(s):  
Fault Diagnosis ◽  
Induction Motors ◽  
Three Phase ◽  
Rotor Cage ◽  
Virtual Flux ◽  
A Current

scholarly journals Influence of Equivalent Circuit Resistances on Operating Parameters on Three-Phase Induction Motors with Powers up to 50 kW

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7130
Author(s):  
Marcel Torrent ◽  
Balduí Blanqué
Keyword(s):  
Equivalent Circuit ◽  
Induction Motors ◽  
Low Voltage ◽  
Optimization Techniques ◽  
Finite Element Program ◽  
Operating Variables ◽  
Electromagnetic Structure ◽  
Three Phase ◽  
Element Program ◽  
Rotor Cage

This work shows the results obtained from studying the influence of equivalent circuit resistances on three-phase induction motors. The stator resistance, rotor resistance, and iron losses resistance affect the different motor operating variables (output power, current, speed, power factor, starting ratios, and maximum torque). These influences have been quantified, paying particular attention to the losses affected and their impact on efficiency. The study carried out does not apply optimization techniques. It evaluates the different influences of the equivalent circuit’s different resistances on its operation by evaluating applicable constructive modifications concerning available motors. The work has been limited to three-phase induction motors up to 50 kW and low voltage, with the nominal powers of the selected motors being 0.25 kW, 1.5 kW, 7.5 kW, 22 kW, and 45 kW. The tools used to carry out the study are analyzing the equivalent circuit and the simulation of the electromagnetic structure using a finite-element program. The variations proposed in each resistance for all the motors studied is not purely theoretical, as it is based on applying feasible constructive modifications, appropriately analyzed and simulated. These modifications are the variation of the conductor diameter in the stator coils, the change of the section of the rotor cage, and the selection of different ferromagnetic steel types.

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