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LINEAR INDUCTION MOTOR



INTRODUCTION


In a sector motor when the sector is laid out flat and a flat
squirrel-cage winding is brought near to it ,we get a Linear
Induction Motor.In practice,instead of a flat squirrel-cage
winding ,an aluminium or copper or iron plate is used as a
‘Rotor’.The flat stator produces a flux that moves in a straight
line from its one end to the other at a linear synchronous speed
given by:
Vs = 2Wf
As the flux m ....etc

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Demand for the research and development of the micro-manufacturing technologies is being fueled by the ever-increasing trend towards miniaturization over a wide spectrum of disciplines and industries. Recent technological advancement in the defense, biomedical, telecom-munications, consumer electronics have spearheaded the need for micromanufacturing technology, which is now beginning to find application in the automotive and aerospace industries due to the economic potential of the micro-factory paradigm. Micro-scale mechanical manufacturing p ....etc

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On the macro scale, feedback control is routinely applied to improve performance and enable new tasks in complex and uncertain systems operating in noisy environments. Our lab has focused on applying feedback control ideas to systems on the micro scale. Here we show how control methods can improve existing performance in the UCLA lab-on-a-chip electrowetting system and can create entirely new capabilities in our 'micro fluidic tweezers' cell steering devices.In the Electro-Wetting-On-Dielectric (EWOD) system developed at UCLA by CJ Kim, a grid ....etc

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Traffic light controller using 8051
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ANALYSIS OF PERFORMANCE OF SINGLE- PHASE RELUCTANCE LINEAR MOTOR
Abstract
This article describes the design and principle of operation, and the electromechanical phenomena of a single phase induction motor.The motor has a primary part which is moving and a stationary secondary part which does not have any winding. AC or DC supply can be used to operate the motor. A capacitor connected in series with the coil must be used when the motor is fed from the AC source. Whereas, a controlled switch connected to the primary circuit mus ....etc

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Laser Micro-Patterning by Means of Optical Fibers with Micro-grinded Lens End Faces




Introduction

Nano-patterning of polymer surface has found a wide range of applications including biotechnology, where holes in the size of hundreds – nm can influence the growth and differentiation of relatively large living cells . Instead of the e-beam patterning technique used in the Ref. 1, we ap-plied direct writing by laser-light. In our previous papers , w ....etc

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Power Factor Correction of Linear and Non-linear Loads Employing a Single Phase Active Power Filter Based on a Full-Bridge Current Source Inverter Controlled Through the Sensor of the AC Mains Current
Abstract:
In the last years the number of non-linear loads has been increasing rapidly. This non-linear load had drawn a current form the AC Mains with harmonic components, leading to low power factor, low efficiency, interference by the EMI, among others. A classic solution is the use of passive filters, which ....etc

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Keywords
Electro-dynamic Suspension (EDS), Urban MagLev, Linear Synchronous Motor (LSM), Permanent
Magnet (PM), Pulse Width Modulation (PWM)
Abstract
A new concept in Urban Maglev transportation design is in the testing phase. The vehicle uses
permanent magnets (PM) for both the electro-dynamic suspension (EDS) and linear synchronous
motor (LSM) propulsion. Because of the 3D coupled non-linear velocity-dependent magnetic
levitation, the LSM must provide stabilizing forces to the vehicle. To do this, Vector Control is used
....etc

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Abstract
An alternating current (AC) electric motor that has had its stator unrolled so that instead of producing a torque (rotation) it produces a linear force along its length is called a linear motor or linear induction motor. The most common mode of operation is as a Lorentz-type actuator, in which the applied force is linearly proportional to the current and the magnetic field.

Many designs have been put forward for linear motors, falling into two major categories, low-acceleration and high-acceleration linear motors. Low-ac ....etc

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