DC Motors
TYPES OF DC MOTORS
Summary
The types of DC motors are summarized below.
Types of DC Motors Summary
In a shunt-wound motor, the field is in parallel, or "shunts" the armature.
In a series-wound motor, the field is in series with the armature.
A compounded DC motor is constructed so that it contains both a shunt and a
series field.
A shunt-wound DC motor has a decreasing torque as speed increases.
The characteristics of a 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.
A series-wound motor has a rapidly increasing torque when speed decreases. As
load is removed from a series-wound motor, the speed will increase sharply.
The advantages of a series-wound motor are that it develops a large torque and
can be operated at low speed. It is a motor that is well-suited for starting heavy
loads.
Rev. 0
Page 11
ES-06
