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

Ral rotate accumulator left through carry instruction , RAL Rotate Accumula...

RAL Rotate Accumulator Left Through Carry Instruction This  instruction rotates the content  of the accumulator  towards left by one bit. The D 0 bit moves to D 1   bit moves

Explain working of three-phase transformers, Q. Explain working of three-ph...

Q. Explain working of three-phase transformers? Transformation in three-phase systems can be accomplished in either of two ways: (1) connecting three identical single-phase tra

OSI Layers, Data transfer code for OSI layers in matlab?

Data transfer code for OSI layers in matlab?

Human resources - kpi, Human Resources - KPI It is the responsibility ...

Human Resources - KPI It is the responsibility of management to have the lean, capable, customer friendly organization that strives for catering to diversified need of all the

Evaluate the current flowing in the direction from b to a, Q A beam contain...

Q A beam containing two types of charged particles is moving from A to B. Particles of type I with charge +3q, and those of type II with charge -2q (where -q is the charge of an el

Give the classification of oscillators, Q. Give the classification of oscil...

Q. Give the classification of oscillators. Discuss the frequency stability of oscillators. Oscillators are classified in the following different ways. 1. According to the wa

Calculate the power dissipated in r and in the diode, Q. Consider the circu...

Q. Consider the circuit of Figure with V S = 94 V, V Z = 12 V, R = 820 , R L = 220 , R S = 0, and R Z = 25 . Assume the reverse saturation current of the zener diode to be

Find terminal line-to-neutral voltage of each phase winding, (a) A wye-conn...

(a) A wye-connected generator is to be designed to supply a 20-kV three-phase line. Find the terminal line-to-neutral voltage of each phase winding. (b) If the windings of the g

Technical losses in power systems, Technical Losses in Power Systems T...

Technical Losses in Power Systems The technical losses in power systems occur because of energy dissipated in the conductors and equipment used for transmission, transformat

Write shorte note on carbon, Write shorte note on Carbon. Carbon: The...

Write shorte note on Carbon. Carbon: The rate of commutator wear in electrical machines is greatly decreased by using brushes made of carbon. Carbon (C) is also used in autom

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