Detection of Static Eccentricity Fault in Saturated Induction Motors by Air-Gap Magnetic Flux Signature Analysis Using Finite Element Method

Power transformers play an indispensable component in AC transmission systems. If the operating condition of a power transformer can be accurately predicted before the equipment is operated, it will help transformer manufacturers to design optimized power transformers. In the optimal design of the power transformer, the design value of the magnetic flux density in the core is important, and it affects the efficiency, cost, and life cycle. Therefore, this paper uses the software of ANSYS Maxwell to solve the instantaneous magnetic flux density distribution, core loss distribution, and total iron loss of the iron core based on the finite element method in the time domain. . In addition, a new external excitation equation is proposed. The new external excitation equation can improve the accuracy of the simulation results and reduce the simulation time. Finally, the three-phase five-limb transformer is developed, and actually measures the local magnetic flux density and total core loss to verify the feasibility of the proposed finite element method of model and simulation parameters.

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Time-Domain Parallel Finite-Element Method for Fast Magnetic Field Analysis of Induction Motors

IEEE Transactions on Magnetics ◽

10.1109/tmag.2013.2245114 ◽

2013 ◽

Vol 49 (5) ◽

pp. 2413-2416 ◽

Cited By ~ 18

Author(s):

Yasuhito Takahashi ◽

Tadashi Tokumasu ◽

Masafumi Fujita ◽

Takeshi Iwashita ◽

Hiroshi Nakashima ◽

...

Keyword(s):

Magnetic Field ◽

Finite Element Method ◽

Finite Element ◽

Time Domain ◽

Induction Motors ◽

Field Analysis ◽

Magnetic Field Analysis ◽

Parallel Finite Element ◽

Element Method

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Bearing Fault Analysis in Induction Motor Drives Using Finite Element Method

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i3.6.14928 ◽

2018 ◽

Vol 7 (3.6) ◽

pp. 30 ◽

Cited By ~ 3

Author(s):

C Vinothraj ◽

N Praveen Kumar ◽

T B. Isha

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Electromagnetic Field ◽

Induction Motor ◽

Flux Density ◽

Air Gap ◽

Voltage Source ◽

Pwm Inverter ◽

Bearing Fault ◽

Element Method

Diagnosis of faults in induction motor is an indispensable process in industries to improve the reliability of the machine and reduce the financial loss. Among the various faults occurring in induction motors (IM), bearing fault is the predominant one which covers nearly 60% of faults. In this paper, a study of the electromagnetic field of an induction motor with bearing fault fed from both the mains and a three phase voltage source PWM inverter in open loop is carried out using Finite element method (FEM). Electromagnetic field parameters like flux lines distribution, flux density distribution and radial air gapflux density are analyzed. The presence of bearing fault can be detected from the spatial FFT spectrum of radial air gap flux density. From the FFT spectrum, it is seen that the amplitude of fundamental component of radial air gap flux density decreases and those around 100 mm distance increases with the severity of fault.

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An analysis of inter-bar currents on a polyphase cage induction motor

Sba Controle & Automação Sociedade Brasileira de Automatica ◽

10.1590/s0103-17592004000400011 ◽

2004 ◽

Vol 15 (4) ◽

pp. 476-484

Author(s):

Renato Carlson ◽

Cláudia A. da Silva ◽

Nelson Sadowski ◽

Michel Lajoie-Mazenc

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Induction Motor ◽

Induction Motors ◽

Short Circuit ◽

Fundamental Component ◽

Cage Induction Motor ◽

Element Method

This work uses a methodology based on 2D-Finite Element Method (FEM) and on the Circuits Theory (Independent Currents Method) to analyze the inter-bar currents on the rotor of cage induction motors. The Multi-Slice Technique is used to consider the skewing effect. Three conditions are considered: one inter-bar resistance, two inter-bar resistances and three inter-bar resistances. The results show the distribution of currents in the rotor bars, short-circuit rings and transversal resistances at a given time. The fundamental component of the inter-bar and surrounding bar currents are shown to help understanding the phenomenon.

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