Power control - motor control , Electrical Engineering

Assignment Help:

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.

 

 


Related Discussions:- Power control - motor control

Dc machine, why very high resistance wire is used is field windind and low ...

why very high resistance wire is used is field windind and low resistance wire is used in armature winding in DC shunt machine?

wind turbine, pls how can i stat up building wind turbin

pls how can i stat up building wind turbine

Find the value of the induced emf, Q. A six-pole, double-layer dc armature ...

Q. A six-pole, double-layer dc armature winding in 28 slots has five turns per coil. If the field flux is 0.025 Wb per pole and the speed of the rotor is 1200 r/min, find the value

What is accelerator key, A keyboard shortcut for a command. For example, Ct...

A keyboard shortcut for a command. For example, Ctrl + Alt + Delete are an accelerator key for the task manager in Windows 95.

Determine IS in the given circuit, Q. Given that V 0 = 10 V, determine IS ...

Q. Given that V 0 = 10 V, determine IS in the circuit drawn in Figure.

Explain the properties of high resistive materials, Explain the properties ...

Explain the properties of high resistivity materials. High resistivity materials: The conducting materials containing resistivity from 10 -6 to 10 -3 ohm-m come under such

State the advantages of expert systems, State the Advantages of expert syst...

State the Advantages of expert systems -  Never "forgets" to ask a question in determining the logic -  provides consistent answers - Less skilled work force needed, ther

Applied mechanics, State whether Lamis theorem is applicable for more than ...

State whether Lamis theorem is applicable for more than three coplanar concurrent forces?

Determine the load - thevenins equivalent circuit, Determine the load - The...

Determine the load - Thevenins Equivalent Circuit: Determine the load for which the source shall transfer the maximum power if load is connected across the terminal A and B, u

Illustrate the principles of operation of centralized, Q. Illustrate the pr...

Q. Illustrate the principles of operation of centralized SPC and distributed SPC and compare their performance. Ans: In centralized control, all control equipment is replac

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd