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Comparison between armature controlled and field controlled DC servo motor

Comparison between armature controlled and field controlled DC servo motor :

Field controlled DC
 servomotor

Armature controlled
 DC servomotor
1.                      
Field is excited by control voltage
Armature is excited by control voltage
2.                      
Armature            current kept
constant
Field      current kept
constant
3.                      
Required             low        power
amplifiers are simple to design
Required             high       power
amplifiers
4.                      
Efficiency is poor
Efficiency is better
5.                      
It has large time constant
It             has         small      time
constant
6.                      
Cost is low
Cost is high
7.                      
It is open loop system
It is close loop system




Comparison between armature controlled and field controlled DC servo motor Video:


Time Division Multiplexing TDM
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Location: Pune, Maharashtra, India

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