What is an induction motor?

What is an induction motor?
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1 Answer

Answer :

An induction motor is an alternating current motor in which the primary winding on one member (usually the stator) is connected to the power source and a secondary winding or a squirrel-cage secondary winding on the other member (usually the rotor) carries the induced current
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Related questions

What are the differences between synchronous and induction motor?*

Description : What are the differences between synchronous and induction motor?*

Last Answer : Synchronous motor : Constant speed on all loads, can be operated on a wide range of power factors, not self starting, requires dc excitation.

How is the speed of a 3-phase induction motor varied?

Description : How is the speed of a 3-phase induction motor varied?

Last Answer : The speed of a normal 3-phase induction motor is a function of the frequency of the supply voltage. Changing the speed of such a motor hence requires building a 3-phase power frequency ... realised by using power MOSFETs (or IGBTs) capable of handling high voltages and fast switching speeds.

The application of mutual induction is: a. TV b. Radio c. Transformer d. Motor

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Last Answer : c. Transformer

The left hand rule correlates to (a) current, induced e.m.f. and direction of force on a conductor (b) magnetic field, electric field and direction of force on a conductor (c) self induction, mutual induction and direction of force on a conductor (d) current, magnetic field and direction of force on a conductor

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Last Answer : (d) current, magnetic field and direction of force on a conductor

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Description : The principle of AC generator is: a. Mutual induction b. self induction c. electromagnetic induction d. Induction

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The phenomenon of producing emf in the coil due to change of current in the coil itself is called: a. mutual induction b. self-induction c. self-inductance d. mutual inductance

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Last Answer : that Motor AC And DC Both Supply A. Let's go Him Universal Motor Says.

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Description : Where is a rotor wound AC motor used?

Last Answer : For starting heavy torques, mostly used on portable machines and small winches.

What can be possible reasons for a motor failing to start?

Description : What can be possible reasons for a motor failing to start?

Last Answer : No power , Fuse blown , Overload trip, contactor coil burnt , Contactors contacts bad, control circuit relay faulty, stop switch open circuit and start switch does not operate, hold on contact does not make and motor burnt

How can the direction of rotation of an AC motor be reversed?*

Description : How can the direction of rotation of an AC motor be reversed?*

Last Answer : By interchanging any two supply lines.

What are the basic parts of a DC motor?*

Description : What are the basic parts of a DC motor?*

Last Answer : Rotor and stator, field poles, commutator, brushes, fan impeller, bearing & housing, end covers and name plate.

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If a motor is wound star and you want to change to delta what should you do?

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Last Answer : Open the terminal connection box. Remove the shorting link connecting the common connection (star) point of A2, B2 and C2. With the 3 phase windings marked A1A2, B1B2, C1C2, connect A2 to B1, B2 to C1 and C2 to A1.

How is the speed of a DC motor varied?

Description : How is the speed of a DC motor varied?

Last Answer : To vary the speed of a DC motor we need a constant voltage power supply with a series POT resistor of higher watt rating. A Pulse Width Modulator (PWM) can be used.

What is a synchronous motor?

Description : What is a synchronous motor?

Last Answer : A constant-speed motor, the speed being dependent on the frequency of the ac supply and the number of poles for which it is designed.

Why are motor ratings given in KW and that of alternator and transformer given in KVA?

Description : Why are motor ratings given in KW and that of alternator and transformer given in KVA?

Last Answer : kW is the output mechanical power of a motor and is expressed in kW. kVA is the net (apparent) power input to the transformer. This input power is the output + losses. kW = kVA x system power factor

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Last Answer : d. gravitational field

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Last Answer : c. cell

When a motor is just started, back emf is almost ______: a. Infinite b. zero c. minimum d. maximum

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Last Answer : d. maximum

If the motor is overloaded, then the magnitude of ‘back emf’” a. Increases b. Decreases c. Constant d. Becomes zero

Description : If the motor is overloaded, then the magnitude of ‘back emf’” a. Increases b. Decreases c. Constant d. Becomes zero

Last Answer : Increases

State the need of energy conservation in electrical motor.

Description : State the need of energy conservation in electrical motor.

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Describe the following energy conservation methods of electrical motor. i) By motor survey ii) By matching loads with motor rating

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Last Answer : Energy conservation methods of electrical motor:  1) By Motor Survey: Large industries have a massive population of LT motors. Load survey of LT motors can be taken-up methodically to ... -speed motors, eddy-current couplings, fluid couplings, and solid-state electronic variable speed drives.

5) An iron ring of mean circumference of 80 cm is uniformly wound with 500 turns of wire. Calculate the value of flux density that a current of 1 A would produce in the ring. Assume relative permeability 1400.

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Can you help me solve my electrical mystery?

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How to tell if a power strip is burned out?

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I accidently soaked an extension cord. Is it safe to use it again after letting it dry out for awhile?

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How can a solar array power source be bypassed when the batteries run low?

Description : How can a solar array power source be bypassed when the batteries run low?

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Air conditioning will not turn on, is it electrical?

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Electrical breaker box is buzzing-why??

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Power Who Say ?

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Power Who Say ?

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Magnetic Tell me Line What ?

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Mutual Inductance What?

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