scholarly journals Generalized two axes model of a squirrel-cage induction motor for rotor fault diagnosis

2008 ◽  
Vol 5 (1) ◽  
pp. 155-170 ◽  
Author(s):  
Hamdani Samir ◽  
Touhami Omar ◽  
Ibtiouen Rachid
Keyword(s):  
Induction Motor ◽  
Magnetic Circuit ◽  
Induction Machine ◽  
Circuit Theory ◽  
Stator Current ◽  
Squirrel Cage ◽  
Power Spectral ◽  
Squirrel Cage Induction Motor ◽  
Cage Induction Motor ◽  
Good Agreement

A generalized two axes model of a squirrel-cage induction motor is developed This model is based on a winding function approach and the coupled magnetic circuit theory and takes into account the stator and the rotor asymmetries due to faults. This paper presents a computer simulation and experimental dynamic characteristics for a healthy induction machine, machine with one broken bar and a machine with two broken bars. The results illustrate good agreement between both simulated and experimental results. Also, the power spectral density PSD was performed to obtain a stator current spectrum.

Investigation of rotor thermal stress in squirrel cage induction motor with broken bar faults

2016 ◽  
Vol 35 (5) ◽  
pp. 1865-1886 ◽  
Author(s):  
Ying Xie ◽  
Ze Wang ◽  
Xueting Shan ◽  
Yangyang Li
Keyword(s):  
Thermal Stress ◽  
Induction Motor ◽  
Coupled Model ◽  
Coupled Analysis ◽  
Content Type ◽  
Squirrel Cage ◽  
Squirrel Cage Induction Motor ◽  
And Performance ◽  
Cage Induction Motor ◽  
Good Agreement

Purpose Thermal stress of the rotor in a squirrel cage induction motor is generated due to the temperature rise, and the structure of the rotor will be destroyed if the stress acted on the rotor exceeds its limits, so the thermal stress is also one of the main causes led to broken bar fault. The purpose of this paper is to report the thermal stress coupled analysis for the induction motor with healthy and faulty rotor, and to find the variation tendency of the temperature and thermal stress due to broken bars, and the part most likely to break in the rotor as a result of the thermal stress load are identified. Design/methodology/approach The steady temperature and thermal stress of the rotor in the case of the healthy and faulty conditions are calculated by finite element method, and the 3D model of the motor used in the experiments is established and the experimental results are presented for both healthy and faulty machines. Findings The influence of the broken bars fault on the motor thermal profile and thermal stress can be found, and it explains why the breaking point always appears in the joint of the bars and end rings. Originality/value The paper presents the 3D thermal stress coupled model and performance characteristics of induction motor with broken bars. The reasonable constraint is established according to the contact of components each other, and more reasonable fracture location is selected. The results obtained by the simulation model are in a good agreement with practical situation, because the effect of skewed rotor were taken into consideration in the process of simulation.

scholarly journals Squirrel cage induction motor fault diagnosis using lissajous curve of an auxiliary winding voltage: case of broken bars

2021 ◽  
Vol 24 (3) ◽  
pp. 1332
Author(s):  
Jelbaoui Yakout Khadouj ◽  
El Menzhi Lamiaà ◽  
Abdallah Saad
Keyword(s):  
Fault Diagnosis ◽  
Induction Motor ◽  
Induction Machine ◽  
Squirrel Cage ◽  
Machine Modeling ◽  
Squirrel Cage Induction Motor ◽  
Incipient Faults ◽  
Simulation Results ◽  
Cage Induction Motor ◽  
Diagnosis Approach

The detection of incipient faults has attracted industrials and researchers specific attention in order to prevent the motor breakdown, improve its reability and increase its lifetime. This paper presents a squirrel cage induction machine broken bar and rings diagnosis approach. This technic uses a new monitored signal as an auxiliary winding voltage related to a small coil inserted between two stator phases. Monitoring behaviors of the Lissajous curve of this auxiliary winding voltage park components under different load levels is the main key of this study. For this purpose, the squirrel cage induction machine modeling and the explicit expressions developed for the inserted winding voltage and its Park components will be presented. Then, an induction machine with different broken cases: one broken bar, two broken bars, broken end ring and broken bars with end ring are investigated. The simulation results confirm the validity of the proposed approach.

scholarly journals Fault diagnosis of a squirrel cage induction motor fed by an inverter using lissajous curve of an auxiliary winding voltage

2021 ◽  
Vol 21 (3) ◽  
pp. 1299
Author(s):  
Yakout Khadouj Jelbaoui ◽  
El Menzhi Lamiaà ◽  
Abdallah Saad
Keyword(s):  
Fault Diagnosis ◽  
Induction Motor ◽  
Induction Motors ◽  
Induction Machine ◽  
Machine Performance ◽  
Squirrel Cage ◽  
Squirrel Cage Induction Motor ◽  
Simulation Results ◽  
Cage Induction Motor ◽  
Electromechanical Conversion

The development of electronic power components has allowed the increase of the induction machine performance. Indeed, monitoring squirrel cage induction motors driven through rectifiers and inverters has been a major concern. This paper presents a new method to diagnose the combination inverter-machine faults. This technic considers an auxiliary winding which is a small coil inserted between two stator phases. It is based on Lissajous curve of this auxiliary winding voltage Park components. For this purpose, modeling the electromechanical conversion chain is necessary. The focus will particularly be on modeling both the squirrel cage induction machine and the inverter in a non-defected case which is a reference. Moreover, the explicit expressions developed for the inserted winding voltage and its Park components will be presented. The simulation results show the effectiveness of the proposed method.

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