Design of Linear Induction Drives by Field Analysis and Finite-Element Techniques

Linear Induction Motor (LIM) belongs to the special type of electrical machines that convert electrical energy to mechanical translatory motions. LIM is already manufactured in many countries and it has several applications starting from light railway transit system to small industries where conventionally rotary motors are used along with rotary to translatory converter, which involves much cost and loss of efficiency. The authors present a survey work on LIM to help the researchers in this field to have a total idea about the design trends & also they present different design issues of a single sided LIM. They designed a single sided LIM & tried to analyze the result with Finite Element Method. Basically design of LIM and to find out the application area is the main task for this nonconventional machine. A simple design procedure is also illustrated in this paper.

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“…Nowadays Finite element approach are being used for design of any sort of machine design. In [7], G.E. Dawson, A.R.…”

Section: A Design Of Limmentioning

confidence: 99%

Design trends of linear induction motor (LIM) and design issues of a single sided LIM

Saha

Das

Chowdhuri

2014

Proceedings of the 2014 International Conference on Control, Instrumentation, Energy and Communication (CIEC)

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“…The distribution regularity of air-gap magnetic flux density along the x axis in an LIM is illustrated as Fig. 1 [12][13][14][15]. The thrust of the LIM, F x , is…”

Section: Air-gap Magnetic Field Of Limmentioning

confidence: 99%

A new method to reduce end effect of linear induction motor

2012

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Abstract:A new method to compensate the end effect of a linear induction motor (LIM) in low-speed maglev vehicles is proposed. With this method, the motors are close to each other so that the front motor's exit-end magnetic field extends into the next motor's entry zone. As a result, the motor's magnetic field traveling wave become continuous and the end effect of short primary LIMs is greatly weakened. In the analysis of the air-gap magnetic field distribution, the LIM is assumedly divided into two identical motors with the distances of 20, 40, 60, and 80 mm. The results show that the air-gap magnetic field is still continuous within these distances due to LIM's end effect. As the distance between two motors increases, the distortion of the air-gap magnetic field becomes more severe. Then, we investigate the relationship between the secondary speed and the thrust in three cases, i.e., a single LIM, two motors divided with 72 mm with pole pitch corrected, and two motors divided with 60 mm without the pole pitch being corrected. We find that the thrust has a small decrease when the speed increases, which means that the magnetic field is already continuous and its amplitude is approximately a constant. Furthermore, the thrust loss of case 3 is more than that of case 2, which indicates that the pole pitch correction is effective.

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“…Up to now, many researchers have introduced different models for LIM, which reflect the end effects. Most of these models depend on field theory, which is utilized in developing the lumped parameter LIM model [1][2][3]. However, the resulting models are complicated for practical modeling and control.…”

Section: Introductionmentioning

confidence: 99%

A detailed model of disk type linear induction machines

Tosifian

Nazarzadeh

2014

Int. Trans. Electr. Energ. Syst.

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SUMMARYIn this paper, a new dynamic model for disk-type linear induction machines (LIMs) is introduced. In this model, the rotor is divided into two regions where regions 1 and 2 are under and out of stator, respectively. In the second region, the rotor is not magnetically coupled with magnetic circuit of the stator, whereas magnetic circuit of region 1 of the rotor is magnetically coupled with magnetic circuit of the stator. A winding function approach is developed and used for calculation of new model inductances. Also, a prototype disk-type LIM is used to produce the experimental results and show the validity of the introduced model. The results showed that the new model can represent the end effect of LIM, dynamically.

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Design of Linear Induction Drives by Field Analysis and Finite-Element Techniques

Cited by 29 publications

References 9 publications

Design trends of linear induction motor (LIM) and design issues of a single sided LIM

Design trends of linear induction motor (LIM) and design issues of a single sided LIM

A new method to reduce end effect of linear induction motor

A detailed model of disk type linear induction machines

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