Why Electric Motors are Rated in kW and not in kVA?
Unlike Generators and Transformers, Electric Motors are rated in kW instead of kVA. We have already discussed why electric transformers … Continue Reading
DC Motor
How to Change the Direction of Rotation of a DC Motor?
DC motors are widely used in various applications, from robotics and industrial machinery to household appliances and automotive systems. One … 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
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
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
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
Armature Reaction in DC Motors
Armature reaction also occurs in a DC motor just like armature reaction in DC Generator. This is expected because when … Continue Reading
5 Types of DC Motors | Series, Shunt, and Compound
Like DC generators, there are different types of DC motors characterized by the connections of the field winding in relation … Continue Reading
Working Principle of DC Motor
A DC motor is an electrical machine that converts electrical energy into mechanical energy. DC motor working is based on the principle … Continue Reading