Since the field current produces the flux, and if we control the field current then the speed can be controlled. In the shunt motor, speed can be controlled by connecting a variable resistor Rc in series with the shunt field winding. In the diagram below resistor, Rc is called the shunt field regulator.
What are the other methods of controlling the speed of DC shunt motor?
Thus, the speed of a DC motor can be controlled in three ways: By varying the supply voltage. By varying the flux, and by varying the current through the field winding. By varying the armature voltage, and by varying the armature resistance.
What is field control method?
Field Controlled DC Motor. ... Voltage can be applied to the terminals of the DC motor or external resistance can be applied in the armature. Another method is to vary the flux per pole of the motor. The first two methods involve adjusting the motor's armature while the latter method involves adjusting the motor field.
