Why starter is used in dc motor

Starters as the name suggest are not used to start the motors specially when the motors are self starting e. Induction Motor (AC motor) and DC Motor. They are primarily used to reduce voltage or current at the starting, thereby protecting the. Back emf create critical role in governing the operation of dc motor.

Back emf is generated as the motor armature start to rotate in presence of magnetic field and It is counter to the supply voltage.

The back emf at the starting is zero and develops as the motor gradually speed up.

Very good question… Lets understand the purpose of using starter.

Starter is used for limiting excessive current which flow at starting. To prevent such high current rush, the starters are used. When the motor speeds up the starter resistance will be decreased gradually.

Hence, building up the back emf slowly causing the level of high starting current maintained for quite some time. Very small dc motors , however, may be . Electrical starters are generally used to limit the sarting current of the inputed voltage to any d. F terminals) can also be used to start series motors, provided the . Let us now look into the construction and working of three point starter to understand how the starting current is restricted to the desired value. A four point starter is thus used.

Abstract— Commonly used method for the starting of dc motors is reduced- voltage starting. Thedevice which is based on triggering of thyristors. At starting, three single-phase silicon controlled rectifier are in OFF position to reduce inrush current and keep the starting.

This paper is about the starters used in DC Motors. In this article we will discuss about necessity of starter for dc motors. DC motor and compound wound DC motor.

The starter serves for limiting the armature current during rotor stall. It consists of resistor segments that can be individually short-circuited. Mind that staring resistor is .