seminars of modern speed control technologies of ac motor

[deepakjena2000]

Oriental Motor Co., Ltd. offers a wide variety of speed control motors. Our speed control motor packages
include the motor, the driver (controller), and a potentiometer which allows for easy speed control adjustment.
There are three speed control motor product groups. The "AC speed control motor unit" that uses the most
popular single-phase capacitor-run induction motor, the small and highly efficient "Brushless DC motor unit",
and the "Inverter unit" that combines a three-phase induction motor with a small inverter. This article explains
the structure, principle of speed control and the features of each product group, and our standard products are
introduced.

Introduction
A large number of motors are being used for general
purposes in our surroundings from house-hold
equipment to machine tools in industrial facilities. The
electric motor is now a necessary and indispensable
source of power in many industries. The function and the
performance required for these motors are wide-ranging.
When focusing attention on the speed control segment of
the motor market, servo and stepping motors control
their speed with a pulse train, while the induction motor
and the brushless DC motor control speed with an
external resistor and/or DC voltage.
This article explains the structure, the speed control
principle, and the features of the following three product
groups that can control the speed relatively easily by
using an analog input.
x AC speed control motor
x Brushless DC motor unit
x Inverter unit

[kirti]

Abstract

On May 1, 1988, when the ICE/V high-speed experimental train of the German Federal Railways (DB) reached the world record speed of 406.9 km/h, it was the first time that the public at large was presented with the future train in high-speed rail traffic. The electric traction equipment of such a forward looking means of traffic must logically represent the latest state of the art. Two development trends in particular characterize the technology. The first is the use of microprocessors for the complete control of the traction system and the second is the use of GTO thyristors for the converters. Siemens innovated the drive system taken from the class BR 120 locomotive of DB for the ICE/V by the development of a microcomputer traction control and a GTO converter. The microcomputer traction control is used for all 82 series power cars, the GTO converters will be provided for the second half of the series power cars

[nilprat]

The electric drive systems used in
industrial applications are increasingly required
to meet the higher performance and reliability
requirement. Today about 90% of all industrial
motor applications use three phase induction
motors because they are simple in design, easy to
maintain, and are less costly than other designs.
The paper is depend upon the batching
system which is one application of weaving
machine which rolls the cloth with specific
tension so that it should neither slacken the cloth
nor tightened it by replacing DC system with the
AC system.. The motion of this loom is controlled
by induction motor where in the AC drive is used
to run the induction motor which rotates the
drum through pulleys.

To get information about it please visit the given website :

http://powershowsearch/presentations/mod...-ac-motors

[saboorali]

An AC motor is an electric motor driven by an alternating current (AC). The AC motor commonly consists of two basic parts, an outside stationary stator having coils supplied with alternating current to produce a rotating magnetic field, and an inside rotor attached to the output shaft producing a second rotating magnetic field. The rotor magnetic field may be produced by permanent magnets, reluctance saliency, or DC or AC electrical windings.
Less commonly, linear AC motors operate on similar principles as rotating motors but have their stationary and moving parts arranged in a straight line configuration, producing linear motion instead of rotation.