Losses Calculation in Line-Start and Inverter-Fed Induction Motors Under Broken Bar Fault

Ebrahimi, Bashir Mahdi; Takbash, A. M.; Faiz, Jawad

doi:10.1109/tim.2012.2212599

Cited by 14 publications

(3 citation statements)

References 32 publications

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“…The second method, FEM with signal processing, is more common and widely is used in the literature. Fault detection of the broken bars [39][40][41][42], bearing failures [43][44][45], and the short circuit of stator windings [46][47][48][49] are the most problems that studied with researchers. Finally, the FEM with machine learning and other techniques has been in few references, such as broken bars with FFT, Yule Walker Estimate by Auto Regression (YUL-AR), and Matching Pursuit (MP) [50], bearing problems with SVM [51], and rotor asymmetry and interturn stator winding short circuits by sparse subspace learning (SSL) [52].…”

Section: B Literature Reviewmentioning

confidence: 99%

Fault Diagnosis of HTS–SLIM Based on 3D Finite Element Method and Hilbert–Huang Transform

2022

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The Linear Induction Motors (LIMs) are a novel structure of industrial motors, which have appeared in recent years. There are various models of optimal LIMs that help better performance. However, no research could be found about the behavior of these motors under the fault conditions. In this paper, a High-Temperature Superconducting Single-sided LIM (HTS-SLIM), with flat-solid secondary sheet is considered. Besides, a comprehensive review of novel and robustness fault diagnosis methods in electrical machines is carried out. To satisfy the paper aims, two mechanical and electrical failures, in forms of broken conductor sheet and short-circuit of coil are considered, respectively, and the dynamic model of the studied motor under short-circuit fault is proposed. The motor is modeled with 3D Finite Element Method (FEM), in order to consider the 3D effects of linear motors. Finally, the electromagnetic and mechanical behaviors of the considered machine are rendered under various conditions. The variation of various parameters are studied and their increament or decreament under faulty states are analyzed. In the next step, the Hilbert-Huang Transform (HHT) is employed to detect the features of the mentioned faults. The results and analysis show that the thrust and speed of motor have decreased under short circuit faults, and they have increased suddenly, when the primary cross over the broken secondary sheet about 600 % and 43 %, respectively. Besides, the flux density of all components under short circuit is reduced, while it increased under broken sheet fault and when these faults occur simultaneously.

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Section: B Literature Reviewmentioning

confidence: 99%

Fault Diagnosis of HTS–SLIM Based on 3D Finite Element Method and Hilbert–Huang Transform

2022

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“…The flux density in the IM core is affected by the slotting effect and power supply harmonics which in turn affects the core loss of the machine [20–24]. Due to these effects, flux density waveforms in machine core are always non‐sinusoidal.…”

Section: Introductionmentioning

confidence: 99%

Core‐loss calculation in different parts of induction motor

Roy

Prabhakar

Kumar

2017

IET Electric Power Applications

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This study describes a technique to determine the core loss in different parts of an induction motor (IM) for any types of electric power supply. To calculate the core loss, flux density waveforms are determined in different parts of the motor. Different forms of Steinmetz equation are used for the core‐loss calculation. The coefficients of these Steinmetz equations are determined using the loss data given by the electrical steel manufacturer. Since, the manufacturer data are available for a limited number of frequencies; a curve fitting technique is used here to determine the loss data at required frequency. The proposed technique is tested on an IM with sinusoidal excitation for different load torques and with sine pulse‐width modulation inverter supply at different switching frequencies. The core loss obtained from with this technique is also compared with other techniques reported in the literature. A good accuracy is obtained between the measured and calculated core loss using proposed technique comparing to other techniques.

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“…The excessive thermal stress is one of the main reasons that causes the fault (Bonnett and Soukup, 1992; Nandi et al , 1999; Milimonfared et al , 1998). Broken bar fault leads to the magnetic field asymmetrical and increase losses (Ebrahimi et al , 2012), so it will alter the temperature rise of the motor (Xie and Wang, 2014), and then the rotor thermal stress will change due to the broken bar structure and rotor temperature increase. In recent years, some works about the thermal stress analysis of the motor have been done.…”

Section: Introductionmentioning

confidence: 99%

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

Xie

Wang

Shan

et al. 2016

COMPEL

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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.

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Losses Calculation in Line-Start and Inverter-Fed Induction Motors Under Broken Bar Fault

Cited by 14 publications

References 32 publications

Fault Diagnosis of HTS–SLIM Based on 3D Finite Element Method and Hilbert–Huang Transform

Fault Diagnosis of HTS–SLIM Based on 3D Finite Element Method and Hilbert–Huang Transform

Core‐loss calculation in different parts of induction motor

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

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