Power control - motor control , Electrical Engineering

Power Control

A chopper converts  fixed  de input voltage to a controllable dc output voltage. It is  the single  stage dc to dc conversion device. It is a high  speed  on/ off  semiconductor switch. The  control of a dc series motor. When  the chopper is ON ( this is  ON period it means chopper  switch  is closed) for the  period Ton  output voltage Vo ( which  is then applied to dc series motor) is equal  to source  voltages.

Vs in this  period  the inductance of armature winding  will store the energy. When the chopper is OFF for period Toff ( it  means chopper  switch  is Opened)  output  voltage  will be zero  but armature current will be  flowing  through  freewheeling  diode FD series fields  and armature.

1708_Power Control.PNG

                                       Figure voltage and current waveforms of a chopper controlled dc series motor

Therefore  the output  voltage  can be controlled  by varying duty  cycle α hence the speed  of dc  series motor  can be  controlled.



Posted Date: 4/3/2013 2:23:45 AM | Location : United States

Related Discussions:- Power control - motor control , Assignment Help, Ask Question on Power control - motor control , Get Answer, Expert's Help, Power control - motor control Discussions

Write discussion on Power control - motor control
Your posts are moderated
Related Questions
Prepayment Meters Usage of prepayment meters will extensively improve the revenue collection of the utilities. There are a number of ways in that prepayment assures revenue pr

Describe the effect of following parameters. Abrasive grit size. Amplitude and frequency of vibration.

What are procedures? Procedures are a group of instructions stored as a separate program in memory and it is known from the main program whenever needed. The type of procedure

On which principle the generator works?

Q. Define Number Systems? A number system, in general, is an ordered set of symbols (digits) with relationships defined for addition, subtraction, multiplication, and division.

Why are some flashlights brighter than others? Why is it important that all of the batteries point in the same direction? What is the difference between old batteries and new? What

i want circuit theory relavant assingment sir please immediately

Binary  Division Similar  to multiplication  division can be seen  multiple  subtractions.  For example  if we have to divide 9 by 4  we can subtract 4 ,2,  times  until is is