The armature windings are the conductor coils placed in the slots of armature core mounted on the shaft of the rotor of a D.C machine. As the e.m.f induced for one turn is very small, each coil of the winding consists of many turns to get the required e.m.f.
Figure 1: Torque-speed characteristics of an induction motor.
Torque Speed Characteristics of Induction Motor Read More »
Figure 1: Torque-slip characteristics of an induction motor.
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A three phase induction motor is an AC motor consisting of a three-phase winding and are used for applications like exhaust fans, lathes, etc.
When the slip of induction motor is negative i.e. , when the induction motor runs at a speed greater than synchronous speed, the induction motor runs as a generator called induction generator. Working of Induction Generator When a 3-ϕ induction motor is given A.C supply and is mechanically coupled to a prime mover then it
What is Induction Generator? Working, Diagram, Characteristics & Applications Read More »
A double cage rotor induction motor gives excellent starting and running characteristics than a deep-bar cage rotor induction motor. It also provides a high starting torque with a low starting current. Therefore it is also known as low-starting current, high starting torque, low slip-motor. The rotor is well designed in order to have high resistance
What is Double Cage Induction Motor? Working, Construction, Diagram & Characteristics Read More »
A transformer is a static A.C machine which transfers electrical energy from one circuit to the other circuit without change in frequency. Working Principle of Transformer Figure 1: Transformer.
What is Transformer? Working Principle, Circuit Diagram & Construction (or Parts) Read More »
Unlike two winding transformer, an auto-transformer contains only one winding. This single winding serves the purpose of both primary as well as secondary. As this transformer employs only one winding, it uses less copper. Hence it is cheaper and more efficient.
What is an Autotransformer? Working Principle, Construction, Types & Applications Read More »
Tap changing transformers are transformers equipped with mechanisms (tap changers) to modify the number of turns in the primary or secondary windings. This adjustment changes the voltage ratio, allowing the output voltage to be regulated under varying input or load conditions. What is Tap Changing Transformer? A transformer with tappings on the primary or secondary
Tap Changing Transformer – Working, Diagram, Types & Applications Read More »
Figure 1: Open Delta Connection of Transformer.
Open Delta Connection or V-V Connection of Transformer Read More »