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

Mov - move instruction, MOV ( Move ) Instruction It copies  the content...

MOV ( Move ) Instruction It copies  the contents of the sources register into destination register. The general format is . This  instruction  is used  to copy 8 bit  from s

Power in balanced three-phase circuits, Power in Balanced Three-Phase Circu...

Power in Balanced Three-Phase Circuits The total power delivered by a three-phase source, or consumed by a three-phase load, is found simply by adding the power in each of the

Demodulation of ssb signals, Demodulation of SSB signals also requires the ...

Demodulation of SSB signals also requires the use of a phase-coherent reference. Figure shows the general configuration to demodulate the SSBsignal.Asmall carrier component, which

FSM(finite state machine, A sequential circuit has two inputs w1 and w2, an...

A sequential circuit has two inputs w1 and w2, and an output, z. Its function is to compare the input sequences on the two inputs. If w1=w2 during any four consecutive clock cycl

Explain function of application layer, Q. Explain function of application l...

Q. Explain function of application layer? Layers of OSI model are as follows: (1) The Physical Layer: This defines an interface in terms of connections, voltage levels and

Simple zener voltage regulator, Consider a simple zener voltage regulator w...

Consider a simple zener voltage regulator with the circuit diagram shown in Figure (a). (a) For a small reverse resistance R Z S and V S - R S i out > V Z , show that v ou

What is resistivity, What is resistivity? Resistivity of a material ma...

What is resistivity? Resistivity of a material may be explained as the resistance of the material having unit length and also unit cross sectional area. Unit of it is ohm-m.

Commercial losses in electrical systems, Commercial Losses in Electrical Sy...

Commercial Losses in Electrical Systems Commercial losses are caused by pilferage, theft, defective meters, and errors in meter reading and in estimating un-metered supply of

Determine the parameters of the double- revolving-field, Q. The no-load and...

Q. The no-load and blocked-rotor tests conducted on a 110-V, single-phase induction motor yield the following data: • No-load test: input voltage 110 V, input current 3.7 A, and

Pdc, disadvantages of shunt&series clippers

disadvantages of shunt&series clippers

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