How to control speed of DC motor with AC power?

Answer Posted / j.senthamizh

First we should be convert ac into dc using rectifier. Dc
motor speed control method classified into two 1.armature
control 2.field control . we are using armature control
method motor speed can be control below rated speed.or
using field control method the motor speed is above rated
speed. most people using armature control method because
field control method is dangerous than armature control
method.we are using field speed control at motor is running
condition and now field is open which times motor running at
dangerous speed. at the time motor bearing and shaft is
affected this condition.

Is This Answer Correct ?    24 Yes 3 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

why the electrolyte level in lead acid battery is maintained 2.5 cms above electrodes?

1597


As i want some model question paper in basic computer science and history please send me immediately sir

1615


what is the IEC standard for Power Cable installation in onshore (like in direct buried ground or above groung)

2362


Explain The Application Of Storage Batteries?

850


WHAT IS MEANT BY TV TERMINAL IN 500MVA TRANSFORMER?

1896






How can I calculate the Mega watts required to run a plant having many electric motors and other electrical components.

1824


why is the power generator connected as star earthed or star earthed through reactance and what its features ?

1373


HOW can i REuse the fused MLL LAMPS & GLS LAMPS at our factory

1608


what is meant by 3rd hormonics ?

1653


from which subjects most of the technical que will b asked for hpcl(electrical).pls help me

1722


how to select the isolation tranformer for siemens 802dsl cnotroller

1772


1.4 What is meant by CT knee point voltage and how would you determine it

1390


If a high resistance fault occurs,then what are the changes will happen in the system?

1169


What facility we get after CT secondary earthing and how?

1940


why and how current drawn by battery charger depends upon the altitude where it is located?

1773