Synchronous motors are not self starting. Some additional devices should be used to start the motor. Basically there are two methods for starting synchronous motors: Induction motor starting (Damper winding) Auxiliary motor starting. Damper Winding Starting Most of the synchronous motors have salient pole structure. A winding consisting of heavy copper bars is … [Read more...] about Starting Methods for Synchronous Motor
The terms ‘Switchgear’ and ‘Motor Control Centres’ are used in general to describe combinations of enclosures, busbars, circuit breakers, power contactors, power fuses, protective relays, controls and indicating devices.Read more about switchgear here What is Switchgear? | Features, Components and ClassificationThe standards used in Europe often refer to IEC60050 for … [Read more...] about What are Motor Control Centres?
1. Synchronous motor can operate at (A) Lagging power factor only (B) Leading power factor only (C) Unity power factor only (D) Lagging, leading and unity power factor only 2. An unexcited single phase synchronous motor is (A) reluctance motor (B) repulsion motor (C) universal motor (D) AC series motor. 3. The … [Read more...] about Multiple Choice Questions (MCQs) on Synchronous Motors
The production of Rotating magnetic field in 3 phase supply is very interesting. When a 3-phase winding is energized from a 3-phase supply, a rotating magnetic field is produced. This field is such that its poles do no remain in a fixed position on the stator but go on shifting their positions around the stator. For this reason, it is called a rotating field. It can be … [Read more...] about Production of Rotating Magnetic Field