Accession Number ADA563034
Title Dynamic Model Based Vector Control of Linear Induction Motor.
Publication Date May 2012
Media Count 9p
Personal Author A. Rimmele Q. Dong S. Biswas V. Rafalko
Abstract Induction machines (IM) have been the workhorse of industry due to their robustness, simple and rugged structure, low cost and reliability. Traditionally, AC machines have been used in open-loop constant speed applications. The linear induction motor (LIM) is an alternative formation of a rotational induction machine (RIM). Typically, the LIM is designed for high force and stroke motion applications, such as material handling and transportation systems. Often a LIM moves along a linear rail directly, so it provides precision positioning tracking performance and high dynamic stiffness with a hard stop when equipped with a linear encoder and closed-loop control methods. A variable frequency vector control is the foundation of modern high performance AC drives for rotary induction motors. The driving principles of the LIM are similar to the RIM, but its control characteristics are more complicated than the RIM. When driven by a field-oriented controller, also known as a vector controller, LIM behaves like a separately excited DC machine where flux and motion dynamics are controlled independently in order to achieve high performance from the IM drives. The vector control method provides velocity and position control of a LIM effectively. In this paper, a mathematical model of a linear induction motor is presented based on the synchronous d-q reference frame. The secondary field oriented vector control strategy is developed for precise force control to achieve the desired speed profile for varying load conditions. Under the developed control scheme,the controller stabilizes the LIM effectively when the mass of the slider is varying. The effectiveness of the proposed control scheme is verified by simulation examples.
Keywords Alternating current
Closed loop systems
Induction motors
Lim(Linear induction motor)
Linear systems
Mathematical models
Rim(Rotational induction machine)

Source Agency Non Paid ADAS
NTIS Subject Category 49 - Electrotechnology
Corporate Author Naval Air Warfare Center Lakehurst, NJ. Aircraft Div.
Document Type Technical report
Title Note Conference paper.
NTIS Issue Number 1226
Contract Number N/A

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