ppt on modern speed control technology in ac motor
#1
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hi all, my name is rahul kumar and im the student of b.tech 3rd year electrical branch in s.r.g.i jhansi.
there is a seminar in my college i want to do search on this topic before i stand up on the stage, i found this link on google. i think i will get help here.
-thankyou
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#2
An innovative technique of speed control of the DC motor driven separately by the Boost converter is being discussed. The purpose of an engine speed controller is to take a signal representing the required speed and drive a motor at that speed. The PWM duty cycle control is equivalent to the voltage control of the motor field winding terminal, which in turn adjusts the motor speed directly. By adjusting the duty cycle of the IGBT, the output voltage is varied. This voltage is above the rated voltage. If we can apply this voltage to the field winding, the flow output is more than the normal level. Because of this, the automatic speed will be reduced. 

By providing a variable series resistance at the output terminal of the helicopter, then if it is varied then the current flow through the field winding is limited. By this condition, the flow output is lower. Now the speed is going to increase. In this method, the field winding must be designed for over rated voltage. This work is feasible and highly feasible according to the economic point of view and precision. In this work, the hardware development design of a closed loop closed circuit motor speed control system has been explained and illustrated by field control with PI speed controller.
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