DC motors are classified into three types depending on the way their field windings are excited. Field winding connections for…

Control of a machine can be semi-automatic or fully automatic. There are probably more machines operated by semi-automatic control than…

Having discussed the starting and stopping of a motor by using control devices like push buttons, contactors and over-load relays,…

When electric motors were first introduced, simple manual switches were used to start and stop the motor. The only protective…

Most of the large synchronous motors are provided with damper windings, in order to nullify the oscillations of the rotor…

The second method of starting a synchronous motor is to attach an external starting motor (pony motor) to it and…

If the rotating magnetic field of the stator in a synchronous motor rotates at a low enough speed, there will…

Basically there are three methods that are used to start a synchronous motor: 1) To reduce the speed of the…

Insulating media in high voltage transformers consists of paper wrapped around the conductors in the transformer coils plus mineral oil…

A permanent magnet dc motor (PMDC) is a dc motor whose poles are made of permanent magnets. PMDC motor offer…