What do you call a DC shunt motor?
In electrical terminology, a parallel circuit is often referred to as a shunt. Hence, DC motors in which the armature and field windings are connected in parallel are referred to as DC shunt motors. The variations in construction between series-wound DC motors and DC shunt motors result in some…
When does a shunt wound DC motor slow down?
On adding a load to the shaft, the motor does slow down initially, but this is where the concept of self regulation comes into the picture. At the very onset of load introduction to a shunt wound DC motor, the speed definitely reduces, and along with speed also reduces the back emf, E b.
What’s the difference between a DC shunt and a parallel circuit?
A parallel circuit is also known as a shunt circuit; thus, the term, “shunt motor” is used. The shunt (field) windings of a DC shunt motor are made of smaller gauge wire, but they have many more turns than a series-wound DC motor.
How can I change the speed of a shunt motor?
So by varying flux, we can change the speed of the motor. In this method, a variable resistance (known as shunt field rheostat) is placed in series with shunt field winding. The field rheostat reduces the shunt field current Ish. So the flux also gets reduced. There the speed can be raised above normal speed as shown in the figure.
Why does a shunt motor have low starting torque?
The motor input power under no-load conditions is consumed in meeting the various losses occurring within the machine. A shunt wound motor is said to have a low starting torque as compared to other motors but it does not mean that a shunt motor is incapable of starting a heavy load.
How is the flux in a DC shunt motor constant?
So, the resultant flux slightly deviates that enables the rotor to develop torque. This developed torque produces a twisting motion in the anti-clockwise direction. The flux in a DC shunt motor is constant. Therefore, as Φ α Ish we can say that Ish is also constant.