Which starter is used for DC shunt motor?

4 point starter
A 4 point starter is used to start and control the speed of a Dc shunt motor with field weakening control.

Which starter is suitable for starting of a DC series motor?

Two point starter is used in series motors because in case of series motor, the armature winding and field winding are connected in series. Therefore series motor achieves dangerous high speed. So series motor should not be started without any load.

Why is a starter required to start a DC shunt motor?

Starters are used to protect DC motors from damage that can be caused by very high current and torque during startup. They do this by providing external resistance to the motor, which is connected in series to the motor’s armature winding and restricts the current to an acceptable level.

Where is a 2 point starter used?

A two-point starter is used for starting dc motor which has the problem of over-speeding due to loss of lod from its shaft. Such a starter is shown in figger. Here for starting the motor, the control arm is moved clockwise from its OFF position to the ON position against the spring tension.

Which starter does not provide high speed protection to the DC shunt motor?

Four point starter does not provide high speed protection to d.c. shunt motor.

How do you start a DC motor?

Three-point starter: When we have to start the dc connected motor, the lever turns gradually to the right. When the lever touches the point 1, the field winding gets directly connected across the supply.

What is the difference between 3 point starter and 4 point starter?

The most significant difference between the three point and the four-point starter is that in three-point starter the no voltage coil (NVC) is connected in series with the field winding whereas in four-point starter the NVC is directly connected to the supply voltage.

What is four point starter in DC motor?

A 4 point starter protects the armature of a DC shunt motor or compound wound DC motor against the initially high starting current of the DC motor.

Why we Cannot use 3 point starter for DC series motor?

Drawbacks of a Three Point Starter Field current becomes very low which results in holding electromagnet too weak to overcome the force exerted by the spring. The holding magnet may release the arm of the starter during the normal operation of the motor and thus disconnect the motor from the line.

Why do we use 3 point starter in DC shunt motor?

A three-point starter is an electrical device, used for starting as well as maintaining the DC shunt motor speed. The connection of resistance in this circuit is in series which decreases the initial high current and guards the equipment against any electrical failures.