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Application of DC Shunt Wound Electric Motor:
The characteristics of a DC shunt wound motor give it very good speed regulation, and it is classified
as a constant speed motor, even though the speed does slightly decrease as load is increased. Shunt-wound motors are used in industrial and automotive applications where precise control of speed and torque are required. Typical Shunt Wound DC Motor speed-torque relationship is shown below.
A shunt-wound DC motor has a
decreasing torque when speed
increases. The decreasing torque vs
speed is caused by the armature
resistance voltage drop and
armature reaction. At a value of
speed near 2.5 times the rated
speed, armature reaction becomes
excessive, causing a rapid decrease
in field flux, and a rapid decline in
torque until a stall condition is reached.
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