DC Shunt Motor - Working Principle, Circuit Diagram
In DC motors the connections of the field windings, as well as the armature, can be done parallel which is known as DC shunt motor, also known as a shunt wound DC motor.
Examining the Characteristics of DC Shunt Motors
Because both windings of this motor will expose to the equal voltage power supply, this motor maintains an invariable speed with any kind of load. This motor has a low starting torque and also runs at a constant speed.
Why so? Magnetic field flux of the field winding = const. If load ↑ => n ↓ => Back EMF within the armature ↓ => IArmature ↑ => Armature field ↑ => T ↑ => n ↑
Reversing a shunt motor
The direction of rotation of a DC shunt motor can be reversed by changing the polarity of either the armature coil or the field coil.
These motors are used wherever stable speed is required. This kind of DC motor can be used to drive Centrifugal Pumps, Conveyors, Lifts, Weaving Machine, Lathe Machines, Blowers, Fans, etc.