Study of double cage induction motors with different rotor bar materials

Gyftakis, Konstantinos N.; Athanasopoulos, D.; Kappatou, J. C.

doi:10.1109/icelmach.2012.6350069

Cited by 10 publications

(5 citation statements)

References 5 publications

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“…Furthermore, since the cost of production increases with the double cage structure, special attention should be paid to the design process not only for the electromagnetic properties of these motors but also for their general behavior (thermal, vibration, etc. ) and their reliability (Gyftakis et al, 2012). The flux distributions that occur during starting and operation of a double cage induction motor are given in Figure 2 (Jahic et al, 2015).…”

Section: Figure 1 Induction Motor Double Cage Equivalent Circuitmentioning

confidence: 99%

“…Although the single cage structure in the industry is used more and more, the double cage rotor structure has a few applications (Lorenzani et al, 2012). Some of these applications can be given as follows: conveyors, crushers, mixers, compressors, loaded pumps and the likes (Gyftakis et al, 2012). The double cage rotor is an effective technique that improves the starting performance of induction motors (Yamamoto et al, 2017), which provides high starting torque and low starting current (Guru et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Dış Kafesinde Kırık Bar Arızası Olan Çift Kafesli Asenkron Motorun Performans Analizi

Yetgin

2020

Mehmet Akif Ersoy Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Induction motors are one of the most commonly used motor in the industry. For this reason, a fault (electrical or mechanical) inside or outside of the motor can cause the motor to go out of power and even cause the production losses inside the factory. Although there are many studies on single-cage induction motor failures in the literature, double cage motor failures are not a frequent subject of study. Therefore, in this study, it was investigated how the outer cage slot faults in a double cage induction motor affect the motor performance. Analyses were performed using Finite Element Method (FEM). 1, 2, 3 and 4 outer cage broken bars in the rotor slot were investigated. Rotor currents, magnetic vector potential values, magnetic flux distributions, current densities, radial forces and torque-speed graphs of the motor models were obtained and compared for both healthy and failure motors. The results show that as the number of broken bar in the rotor increased, a significant reduction was observed in all three torque (starting, maximum and nominal) values. It has been observed that the starting torque decreased by 13.77% for the 4 broken outer cage rotor bars motor according to the healthy motor.

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Section: Figure 1 Induction Motor Double Cage Equivalent Circuitmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dış Kafesinde Kırık Bar Arızası Olan Çift Kafesli Asenkron Motorun Performans Analizi

Yetgin

2020

Mehmet Akif Ersoy Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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“…In this paragraph, a NEMA's class C, double cage induction motor is studied [19]. This motor has exactly the same stator with the previously studied single cage induction motor.…”

Section: Double Cage Induction Motor Fem Simulationmentioning

confidence: 99%

Broken bar fault diagnosis in single and double cage induction motors fed by asymmetrical voltage supply

Gyftakis

Athanasopoulos

Kappatou

2013

2013 9th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives (SDEMPED)

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Φ Abstract --The diagnosis of faults in induction motors is a crucial scientific subject since it affects the industrial production functionality and reliability. Lately, a new scientific area is born: the electrical machines prognostics. So, aiming to this direction the complete knowledge of all abnormal parameters during the induction motor operation should be identified. In this paper, a methodology is described in order to identify not only if there is a broken bar fault, but also if the induction motor voltage supply is asymmetrical at the same time. The investigation is carried out with transient FEM simulations. The proposed methodology comes to supplement the traditional MCSA method with desired satisfaction.

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“…Work has been done on thermal and ventilation issues in electrical machines [4], and thermal analysis is becoming an increasingly important part of motor design algorithms [5][6][7]. Another direction of work aimed at improving the resistance of cage windings involves changes to the cage winding material and the shape of rotor slots [8][9][10][11]. Work is also ongoing on modernising the design of cage windings to increase their resistance to damage [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Mróz,

Bogusz

2021

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This article considers the problem of the rise in temperature of the windings of an induction motor during start-up. Excessive growth of thermal stresses in the structure of a cage winding increases the probability of damage to the winding of the rotor. For the purpose of analysis of the problem, simplified mathematical relationships are given, enabling the comparison of quantities of energy released in a rotor winding during start-up by different methods. Also, laboratory tests were carried out on a specially adapted cage induction motor enabling measurement of the temperature of a rotor winding during its operation. Because there was no possibility of investigating motors in medium-and high-power drive systems, the authors decided to carry out tests on a low-power motor. The study concerned the start-up of a drive system with a 4 kW cage induction motor. Changes in the winding temperature were recorded for three cases: direct online start-up, soft starting, and the use of a variable-frequency drive (VFD). Conclusions were drawn based on the results obtained. In high-power motors, the observed phenomena occur with greater intensity, because of the use of deep bar and double cage rotors. For this reason, indication is made of the particular need for research into the energy aspects of different start-up methods for medium-and high-power cage induction motors in conditions of prolonged start-up.

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Study of double cage induction motors with different rotor bar materials

Cited by 10 publications

References 5 publications

Dış Kafesinde Kırık Bar Arızası Olan Çift Kafesli Asenkron Motorun Performans Analizi

Dış Kafesinde Kırık Bar Arızası Olan Çift Kafesli Asenkron Motorun Performans Analizi

Broken bar fault diagnosis in single and double cage induction motors fed by asymmetrical voltage supply

Bulletin of the Polish Academy of Sciences: Technical Sciences

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