DC Machine

Different DC motors are used in industry for various applications. Which type of motor will suit a particular load depends on the requirements of the load and characteristics exhibited by the motor. Applications of different motors are as under: DC Shunt Motor Applications Fig. 1: DC Shunt Motor Torque speed characteristics.

A two point starter (or 2 Point Starter) is used for starting of a DC series motor. Fig. 1: 2 Point Starter

DC Motor Starter is an additional external device which is required to be connected along with a dc motor, in order to start the motor in a safe manner. That means starting a dc motor without a starter is not safe for the motor. So we should understand the need of starter (Fig. 1). Fig.

The constructional details of a three point starter are shown in Fig. 1. This is called as a three point starter because three points L, A and F are brought out for the external connections.

There are many configurations of ac synchronous motors in which semiconductor control is used for controlling the stator currents in such a way that maximum torque is obtained at a given speed. Such configurations can be termed as brushless dc motors (or BLDC motors). Fig. 1: Construction of BLDC motor.