Question

explain the construction of three point starter​

Answer 1

Explanation:

a 3point starter is a device that helps in the starting and running of a DC shunt motor or compound wound DC motor (similar to a 4 point starter).

Answer 2

Answer:

A 3 point starter is a device that helps in the starting and running of a DC shunt motor or compound wound DC motor (similar to a 4 point starter).

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 plays a critical role in governing the operation of the motor. The back emf develops as the motor armature starts to rotate in presence of the magnetic field, by generating action and counters the supply voltage. Hence the back emf at the starting of the motor is zero, but it develops gradually as the motor gathers speed.

Explanation:

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