The Linear Induction Motor (LIM) & Single Linear Induction Motor (SLIM)
Issue:
Volume 3, Issue 4, July 2014
Pages:
71-75
Received:
13 June 2014
Accepted:
27 June 2014
Published:
20 July 2014
Abstract: First of all mentions linear induction machines in 1890, only two years after the discovery of the rotary induction principle. Basically the concept of the linear device consists in imagining a rotary machine to be cut along a radial plane and 'unrolled' so that the primary member then consists of a single row of coils in slots in a laminated steel core. The differences between rotary and linear motors are outlined and reasons for the slow application of linear motors are explained. Principal developments in linear machines since the 1950s are described. Induction motor which can be used to power capsules in an xv capsules in a pneumatic capsule pipeline system. Several optimal design schemes of a single sided linear induction motor (SLIM) adopted in linear metro are presented in this paper Firstly the equivalent circuit of SLIM fully considering the end effects, half-filled slots, back iron saturation and skin effect is proposed ,based on one dimensional air gap magnetic equations In the circuit, several coefficients including longitudinal end effect coefficients Kr(s) and Kx(s), transversal end edge effect coefficients Cr(s) and Cx (s), and skin effect coefficient K fare achieved by using the dummy electric potential method and complex power equivalence between primary and secondary sides Furthermore, several optimal design restraint equations of SLIM are provided in order to improve the operational efficiency and reduce the primary weight. The result tries to establish a new concept for elevators through a new construction technique and assembly of the system with counterweight, which increases the reliability and comfort with cost reduction.
Abstract: First of all mentions linear induction machines in 1890, only two years after the discovery of the rotary induction principle. Basically the concept of the linear device consists in imagining a rotary machine to be cut along a radial plane and 'unrolled' so that the primary member then consists of a single row of coils in slots in a laminated steel...
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Transient Stability of 11-Bus System Using SVC and Improvement of Voltage Profile in Transmission Line Using Series Compensator
Issue:
Volume 3, Issue 4, July 2014
Pages:
76-85
Received:
7 August 2014
Accepted:
21 August 2014
Published:
30 August 2014
Abstract: Power system stability is defined as the ability of power system to preserve its steady stability or recover the initial steady state after any deviation of the system’s operation. Present time power systems are being operated nearer to their stability limits due to economic and environmental reasons. Maintaining a stable and secure operation of a power system is therefore a very important and challenging issue. Transient stability has been given much attention by power system researchers and planners in recent years, and is being regarded as one of the major sources of power system insecurity. Shunt FACTS devices play an important role in improving the transient stability, increasing transmission capacity and damping low frequency oscillations. In this work 11-bus power system network has been modeled using MATLAB SIMULINK software. The power system network under study consist of three units of power plant each producing 20 KV and step up by two winding transformer to 230 KV. For parallel operation of two different power plants, the frequency and the terminal voltage has been kept constant to avoid circulating current in the existing network. A Static VAR Compensator and a series compensator have been used in the considered network for improving the transient stability and to increase the transmission capacity of the system.
Abstract: Power system stability is defined as the ability of power system to preserve its steady stability or recover the initial steady state after any deviation of the system’s operation. Present time power systems are being operated nearer to their stability limits due to economic and environmental reasons. Maintaining a stable and secure operation of a ...
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