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 … [Read more...] about Starting Methods for Synchronous Motor
The Motor Control Centre is 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 … [Read more...] about What are Motor Control Centres?
An induction motor may be considered to be a transformer with a rotating short-circuited secondary. The stator winding corresponds to the transformer primary and the rotor winding to the transformer secondary. However, the following differences between the two are worth … [Read more...] about Comparison between Induction Motor and Transformer
1. A 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) … [Read more...] about Multiple Choice Questions (MCQs) on Synchronous Motors
In this post, we will look into the characteristics of a DC series motor. A DC series motor is one type of DC motor in which field winding is connected in series with the armature winding. The performance of any motor can be judged from its characteristic curves known as motor … [Read more...] about Characteristics of DC Series Motor
Two types of noises occur in an electric motor, one is electrical noise and the other is mechanical noise. The causes of remedial treatments for both are discussed in this article. Electrical Noise in Motor The following are the various causes of electrical noise in a … [Read more...] about Electrical and Mechanical Noise in Motors
Armature reaction also occurs in a DC motor just like armature reaction in DC Generator. This is expected because when current flows through the armature conductors of a DC motor, it produces flux (armature flux) which lets on the flux produced by the main poles. For a … [Read more...] about Armature Reaction in DC Motors
Electric Motors need maintenance regularly in order to avoid failure and prolong their lifespan. Generally, motors and motor parts should be maintained and tested at least every 6 months. Then only it is possible to maintain a motor’s life and efficiency. We are going to deal … [Read more...] about Electric Motor Maintenance : Preventive, Predictive and Reactive Maintenance