4 Phase 2 Pole Stepper motor

Stepper Motor

The DC motor rotates continuously when it supplied by the DC source. The direction of rotation depends on the polarity of the supply. But the stepper motor rotations are not…

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What is an Electrical Drive?

What is an Electrical Drive?

The electrical drive was introduced in Russia by B.S. Iakobi in 1838. He designed a  DC electric motor supplied from a DC battery and used to propel a boat. This…

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Types of DC Machine

Types of DC Machine

The DC machine works on Faraday’s Law of Electromagnetic Induction. There are two windings in the DC machine; field winding and armature winding. The circulating current supplied to the field…

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Synchronous Machine_ Construction, Classification, Application, Advantages and Disadvantages

Synchronous Machine: Construction, Classification, Application, Advantages and Disadvantages

The machines classified as AC machine and DC machine. In AC machine, the induction machine and synchronous machine are widely used. In this article, we will discuss the synchronous machine….

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Open circuit test of transformer

Open circuit test of Transformer

There are four tests in the transformer. Polarity test Open circuit test Short circuit test Sumpner’s test or back to back test In this article, we will explain the open…

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Ideal Transformer: properties and phasor diagram

An ideal transformer is an imaginary transformer. The proprieties of the practical transformers are different than the ideal transformers. The operation of the practical transformer is close to the ideal…

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Transformer Losses

Transformer Losses

Among all electrical machines, the transformer is the most efficient electrical machine. As shown in  working of the transformer, it is a static device. Hence, friction and windage losses are…

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torque slip characteristics of induction motor

Torque Slip Characteristics of Induction Motor

Torque slip and Torque speed curve obtain from the torque equation. (1)   The slip() defines as the ratio of the difference of synchronous speed () and rotor speed ()…

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Linear Induction Motor (LIM)

The linear induction motors use for traction work. It works on electromagnetic induction principle. Similar to the rotational induction motor, it has two windings; primary winding and a secondary winding….

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Double Cage Induction Motor

We have seen the construction of the induction motor. The starting torque of the motor depends on rotor resistance. In the case of three-phase squirrel cage induction motor, we cannot…

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