Answer / chin2

we can add a resistance to the field winding to control the
speed of the motor

Answer / abhaynath

Using chopper circuit we can control the dc motor

Answer / vijayakrishna

somany methods are used
field control,armature resistence

field control method: we add a veriable resistence in
series with fielled winding to control the speed of the
motor.
armature control:we add a veriable resistence in series
with armature winding to control the speed of the motor.

Answer / chandan adhikary

Pulse width modulation is the best way of speed control of dc motor..

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which motor is suitable for traction? why?

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