3 Phase Induction Motor Questions And Answers Pdf In Hindi


By Alceo L.
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21.05.2021 at 05:12
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3 phase induction motor questions and answers pdf in hindi

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From the left you have the main contactor with the pneumatic timer because your main contactor is always energized, in the Middle you have the Delta contactor with a thermal overload for motor protection in case the motor exceeds the ampere rating set on the thermal overload, on the right you have the Star contactor which is the first contactor to be energized with the main contactor then when the timer reaches its time limit the Star contactor de-energizes and the Delta contactor energizes and the Motor is running at full load. This way, the circuit is completed, as a result;. Related Post:.

Like any electric motor, a 3-phase induction motor has a stator and rotor. Only the stator winding is fed from 3-phase supply.

3 Phase Induction Motor – Construction and Working

It has a single cage rotor, and its stator has two windings known as main winding and starting winding. Both the windings are displaced 90 degrees in space. The main winding has very low resistance and a high inductive reactance whereas the starting winding has high resistance and low inductive reactance. The Connection Diagram of the motor is shown below. A resistor is connected in series with the auxiliary winding. The current in the two windings is not equal as a result the rotating field is not uniform.

What is Slip Ring Induction Motor and Its Working

You all must have this kind of questions in your mind. Below article will solve this puzzle of yours. Just take a look. A methods — steady state power angle characteristics— Two reaction theory —slip test -short circuit transients — Capability Curves. Question Papers.

Split Phase Induction Motor

A motor with only armortisseur windings is called an induction motor. An induction motor is the most modest electrical machine from constructional point of view, in the majority of the cases. Induction motor works on the principle of induction where electro-magnetic field is induced into the rotor when rotating magnetic field of stator cuts the stationary rotor.

An induction motor is an electrical device that converts electrical energy into mechanical energy. It is most widely used for industrial applications due to its self-starting attribute. Slip ring induction motor is one of the types of 3-phase induction motor and is a wound rotor motor type. Because of various advantages like low initial current, high starting torque, and improved power factor, it is used in applications that require high torque, cranes, and elevators.

Difference Between Single Phase & Three Phase Induction Motor

In a split phase motor, the running winding should have a high resistance and low inductance b low resistance and high inductance c high resistance as well as high inductance d low resistance as well as low inductiance Ans: b. If the capacitor of a single-phase motor is short-circuited a the motor will not start b the motor will run c the motor will run in reverse direction d the motor will run in the same direction at reduced r.

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