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

Compute the efficiency of the transformer, Compute the efficiency of the tr...

Compute the efficiency of the transformer of Example corresponding to (a) full load, 0.8 power factor lagging, and (b) one-half load, 0.6 power factor lagging, given that the input

Depletion in mosfert, #Minimum 100 words accepted#explain depletion operati...

#Minimum 100 words accepted#explain depletion operations of MOSFET

8 bit data to register - move immediate instruction , 8 bit  data to Regi...

8 bit  data to Register   This form  of the  instruction is used to copy 8 bit  data directly  to the register  location specified in  the instruction. The  instruction format i

Digital control system, a digital computer controlled rolling mill regulato...

a digital computer controlled rolling mill regulator system..

Fault analysis, The one line diagram of a simple three phase power system i...

The one line diagram of a simple three phase power system is shown in figure below. Each generator is represented by an emf behind the transient reactance. All impedances are expre

Common source drain and transfer characteristics of a jfet, Q. Draw the com...

Q. Draw the common source drain and transfer characteristics of a JFET. How are they useful? The graph below shows  variation of the drain current Id as a function of the drain

Calculate the diameter of the core, A step index multi mode fibre along wit...

A step index multi mode fibre along with numerical aperture of 0.2 supports approximately 1000 modes at an 850µm wavelength. Calculate a) What is the diameter of the core? b)

Op-amp amplifier, A voltage signal generated by a sensor conditioning circu...

A voltage signal generated by a sensor conditioning circuit varies from -0.5V to +0.5V . The signal from the sensor is to be connected to the analog to digital  converter which onl

Signals and spectral analysis, Q. Signals and spectral analysis? Figure...

Q. Signals and spectral analysis? Figure shows the functional block diagram of a signal-processing system. The information source may be a speech (voice), an image (picture), o

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