Insulators, Conductors and Semiconductors (with Band Diagram)
Solid state materials can be classified into three groups: Insulators have no free charge carriers available with them under normal … Continue Reading
Swinburne’s Test of DC Machine (Generator and Motor)
Swinburne’s test is the simplest indirect method of testing dc machines. In this method, the dc machine (generator or motor) … Continue Reading
Testing of DC Machines (DC Motor and DC Generator)
There are several tests that are conducted for testing a dc machine (generator or motor) to judge its performance. The most important … Continue Reading
Working Principle of Transformer
A transformer is a fundamental electrical device that transfers electrical energy between two or more circuits through the principle of … Continue Reading
Electrical and Mechanical Noise in Motors
Two types of noises occur in an electric motor, one is electrical noise and the other is mechanical noise. The … Continue Reading
What do Electrical Engineers Do?
An electrical engineer is someone who designs and develops new electrical equipment, solves problems and tests equipment. They work with … Continue Reading
Back EMF and Its Significance in DC Motor
What is Back EMF? When the armature of a DC motor rotates under the influence of the driving torque, the armature … Continue Reading
4 Advantages of Stationary Armature in Alternator
An alternator operates on the same fundamental principle of electromagnetic induction as a DC generator i.e., when the flux linking a … Continue Reading
Compensating Windings and Interpoles in DC Machines
Compensating Windings and Interpoles are one of the important step taken to minimize the undesirable effect of armature reaction in … Continue Reading
Moulded Case Circuit Breaker (MCCB) – Types and Working
Moulded Case Circuit Breaker is an electromechanical device which protects a circuit from overcurrent and short circuit. It provides overcurrent … Continue Reading