Three Point Starter: Diagram and Working Principle

A 3 point starter is a device that helps in the starting and running of a DC shunt motor or compound wound DC motor. Now the question is why these types of DC motors require the assistance of the starter in the first place? Well, it’s due to the presence of back emf (Eb), which … Read more

Four Point Starter: Diagram and Working Principle

Working Principle of 4 Point Starter The 4 point starter like in the case of a 3 point starter also acts as a protective device that helps in safeguarding the armature of the shunt or compound excited DC motor against the high starting current produced in the absence of back emf at starting. The 4 … Read more

Starting Methods to limit Starting Current and Torque of DC Motor

Starting of DC Motor The starting of DC motor is somewhat different from the starting of all other types of electrical motors. This difference is credited to the fact that a DC motor unlike other types of motor has a very high starting current that has the potential of damaging the internal circuit of the … Read more