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After the starting winding of a single phase induction motor is disconnected from supply, it continues to run only on running winding.

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Here we not disconnect whole IM we only disconnect auxiliary winding and thus it start works only on main winding.
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Reason is kinetic energy 
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Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a magnetic relay.

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A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will?

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A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will not start at all.

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If a single phase induction motor runs slower than normal, the most likely defect is worn bearings.

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How does a single phase induction motor work?

Answer :

As we know that single phase induction is not self started because for self started we require atleast two revolving field but single phase induction motor has only one. So we provide extra ... 1phase IM classified as split phase IM, capacitor start capacitor run, capacitor start induction run.

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Description :

explain the working of single phase induction motor.

Answer :

Stator has two winding namely main winding and auxiliary winding.when single phase ac supply is given to the motor,its produces alternating field.this field cut by a cage rotor.so some emf ... due to this emf,rotor flux produced.the interaction between two fluxes produce torque.so rotor rotates.

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Description :

Single Phase Induction Motor

Answer :

Single Phase Induction Motor Single phase induction motor is mostly used in home, office, shop and many single phase appliances like pumps,  ... torque and silent operation. It is uses where silent operation is required.

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Description :

What is the slip (as a percentage) when a 6 pole single phase induction motor operating on 220 V and 60 Hz is rotating at speed of 1140 rpm? A) 60% B) 5% C) 10% D) None of these

Answer :

What is the slip (as a percentage) when a 6 pole single phase induction motor operating on 220 V and 60 Hz is rotating at speed of 1140 rpm? A) 60% B) 5% C) 10% D) None of these

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Description :

Answer :

Single phase induction motor usually operates on 0.6 power factor lagging.

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Description :

Explain the working of a single phase capacitor start induction motor. 

Answer :

Single phase capacitor start induction motor https://youtu.be/31lvvzU5Puc

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Description :

Answer :

If starting winding of a single-phase induction motor is left in the circuit, it will draw excessive current and overheat.

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Description :

How is a three phase cage induction motor self starting?

Answer :

Any type of induction motor is self starting. Because the reason for torqe production require two flux displaced by some angle theta.If theta is constant with time then torqe will be constant;if ... torqe also pulsating. In induction motor this angle theta is not pulsating.so it is self starting 

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Description :

The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be?

Answer :

The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be at the slot edge where coil enters or comes out of the slot.

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Description :

A change of 4% in the supply voltage to an induction motor will produce a change of approximately

Answer :

A change of 4% in the supply voltage to an induction motor will produce a change of approximately 8% in the rotor torque

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Answer :

Induction type single phase energy meters measure electric energy in kWh.

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Description :

Split phase induction motor

Answer :

Split phase induction motor : There are two windings used in split phase induction motor. It is a type of single-phase induction motor. There are two winding one is called main winding and ... motor have low starting torque it is used for small fans, blowers, centrifugal pumps, grinders etc.

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Description :

The slip of 400 V, three phase, 4 -pole induction motor when rotating at 1440 rpm is 

Answer :

The slip of 400 V, three phase, 4 -pole induction motor when rotating at 1440 rpm is 4 percent

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What is mean by plugging in three phase induction motor?

Answer :

Plugging in three-phase induction motor means interchanging of any two phases of a stator for quick stopping.

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speed control methods of three phase induction motor?

Answer :

Speed control of three phase induction motor

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Answer :

Capacitor start motor has high torque in starting

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Explain with neat circuit diagrams the procedures to perform no load and blocked rotor tests on three phase induction motor.

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Explain the need and steps to conduct the reduced voltage running up test on the three phase induction motor.

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Description :

Why is a capacitor used in a single phase motor and not in three phase motor ?

Answer :

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Description :

Answer :

In a single phase motor the centrifugal switch disconnects auxiliary winding of the motor.

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State suitable single phase motor for following applications: (i) Table fan (ii) Mixers and Grinders

Answer :

Application Suitable Single Phase Motor Table Fan 1) Capacitor split phase motor 2) Capacitor start capacitor run motor Mixers and Grinders 1) Universal motor 2) A.C. Series motor

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Description :

working principle of single phase motor

Answer :

The Stator of single phase induction motor houses two windings  1. Main (Running) winding 2. Auxiliary (Starting ) winding Rotor of single phase induction motor is ... with starting winding or a capacitor may be permanently connected in series with Auxiliary (Starting ) winding.

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Description :

An unexcited single phase synchronous motor is ?

Answer :

An unexcited single-phase synchronous motor is reluctance motor.

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State any four advantages of three phase induction motor. 

Answer :

Advantages of three phase induction motor https://youtu.be/27OIOCKN05U

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Description :

how can we reverse the direction of rotation of three phase induction motor ?

Answer :

The direction of rotation of three phase induction motor can be reversed by plugging i.e by changing any two out of three phases of the supply to the stator of the Induction motor terminal.

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Answer :

In a single-phase induction motor when the rotor is stationary and voltage is applied to the stator, then the flux first decreases and then increases in the same direction

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what will happen when excitation of an unloaded salient pole synchronous motor suddenly gets disconnected?

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When excitation of an unloaded salient pole synchronous motor suddenly gets disconnected the motor will stop.

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Is induction motor is self starting?

Answer :

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Answer :

In a capacitor start motor, the phase displacement between starting and running winding can be nearly 90°.

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In a three-phase supply floating neutral is undesirable because it way give rise to?

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Answer :

In split phase motor main winding is of thick wire placed at the bottom of the slots.

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Description :

Answer :

The starting winding of a single-phase motor is placed in stator.

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The disc of a single phase Induction-type energy meter makes 60 revolutions in 6 minutes. Meter Constant is 1200 rev/kWh. Power consumption in the load is (A) 1.2 kW (B) 1 kW (C) 600 W (D) 500 W

Answer :

The disc of a single phase Induction-type energy meter makes 60 revolutions in 6 minutes. Meter Constant is 1200 rev/kWh. Power consumption in the load is 500 W

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Description :

In a single-phase induction motor, the operating direction is determined by the ________ A) Rotor B) Stator C) Starting circuit D) None of these

Answer :

In a single-phase induction motor, the operating direction is determined by the Starting circuit

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A single-phase induction motor is inherently non-self-starting with low torque.

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The power factor of a single-phase induction motor is usually lagging.

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Answer :

The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque Increases 

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Description :

In a split-phase induction motor, the resistance/reactance ratios of windings are such that (A) current in the auxiliary winding leads the current in the main winding (B) current in the auxiliary winding lags the current in the main winding (C) both windings develop the same starting torque (D) both windings develop high starting current

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In a split-phase induction motor, the resistance/reactance ratios of windings are such that current in the auxiliary winding leads the current in the main winding

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A 3-phase, 4-pole, 50Hz induction motor runs at a speed of 1440 rpm. The rotating field produced by the rotor rotates at a speed of ________ rpm with respect to stator field. (A) 1500 (B) 0 (C) 1440 (D) 60

Answer :

0

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An 8-pole, 50Hz, three-phase induction motor is running at 705rpm and has a rotor copper loss of 5kW. Its rotor input is (A) 5.06 kW (B) 0.3 kW (C) 100 kW (D) 83.33 kW

Answer :

An 8-pole, 50Hz, three-phase induction motor is running at 705rpm and has a rotor copper loss of 5kW. Its rotor input is 83.33 kW

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Description :

In a 3-phase slip-ring induction motor, the slip at some speed is 0.05. The speed is reduced by inserting an external resistance in the rotor circuit and the slip is 0.15. If the rotor winding resistance per phase is 0.2 Ω, the external resistance is (A) 0.2 Ω (B) 0.3 Ω (C) 0.4 Ω (D) 0.5 Ω

Answer :

In a 3-phase slip-ring induction motor, the slip at some speed is 0.05. The speed is reduced by inserting an external resistance in the rotor circuit and the slip is 0.15. If the rotor winding resistance per phase is 0.2 Ω, the external resistance is 0.3 Ω

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What are the five types of single phase motors used in the industry?

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