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2krishnanunnis
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Join Date: Apr 2011
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DC Motor

04/23/2011 1:46 AM

i have a doubt..is dc motor a voltage controlled device or a current controlled device???
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TonyS
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#1

Re: dc motor

04/23/2011 3:16 AM

http://www.lmphotonics.com/vsd/vsd_02.htm

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Signode
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#2
In reply to #1

Re: dc motor

04/23/2011 6:07 AM

basically DC motor is a voltage controlled device i.e when apply voltage to armature increases, its speed increases.

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TonyS
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#3
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Re: dc motor

04/23/2011 6:13 AM

So what happens when you increase the field voltage?

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hien.nguyenquoc
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#4
In reply to #3

Re: dc motor

04/23/2011 6:51 AM

It can be both depending on the application:

If you want to adjust torque, go for current control.

If you want to adjust speed, go gor voltage control.

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harry potter
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#5

Re: dc motor

04/23/2011 7:01 AM

Dear,

DC Shunt motor is voltage controlled device. By controlling the voltage across the shunt winding, speed of motor varries.

DC Series motor is current controlled device. Even though, we gradually change the voltage across motor terminals, but by change in voltage changes the current in field ( as well as Armature ) winding, changing the torque as well as speed.

DC Series Shunt motor is voltage & current controlled device. Voltage across shunt controls the speed.

Current in series winding controls the torque.

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34point5
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#6

Re: DC Motor

04/25/2011 11:45 PM

How do you get current to flow?

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