Why does induction motor have high starting current?

Question

Why does induction motor have high starting current?

143 views

asked Mar 15, 2018 by anonymous

2 Answers

Please log in or register to answer this question.

Related Questions

Why starter is required for starting an induction motor?

114 views 0 answers

asked Mar 15, 2018 by anonymous

In a double squirrel cage induction motor, good starting torque is produced as

In a double squirrel cage induction motor, good starting torque is produced as (A) Large current flows through the outer high resistance winding. (B) Large current flows through the inner high ... the outer high resistance winding. (D) Large current flows through the inner low resistance winding.
Last Answer : In a double squirrel cage induction motor, good starting torque is produced as Large current flows through the outer high resistance winding.

137 views 1 answer

asked May 8, 2018 by anonymous

If starting winding of a single-phase induction motor is left in the circuit, it will?

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

236 views 1 answer

asked Mar 20, 2018 by anonymous

How is a three phase cage induction motor self starting?

How is a three phase cage induction motor self starting?
Last 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

160 views 1 answer

asked Mar 17, 2018 by anonymous

Is induction motor is self starting?

Is induction motor is self starting?
Last Answer : Single phase induction motor is not self starting. Three phase induction motor is self starting.

112 views 1 answer

asked Mar 17, 2018 by anonymous

which single phase induction motor has highest starting torque?

Last Answer : Capacitor start motor has high torque in starting

136 views 1 answer

asked Sep 13, 2017 by anonymous

Why a dc series motor has a high starting torque?

Why a dc series motor has a high starting torque?
Last Answer : motor

86 views 1 answer

asked Mar 15, 2018 by anonymous

An induction motor has relatively high power factor at?

Last Answer : An induction motor has relatively high power factor at near full load.

92 views 1 answer

asked Mar 20, 2018 by anonymous

Why high starting torque is required?

64 views 0 answers

asked Mar 15, 2018 by anonymous

Buses, trains, trolleys, hoists, cranes require high starting torque and therefore make use of?

Last Answer : Buses, trains, trolleys, hoists, cranes require high starting torque and therefore make use of D.C. series motor.

118 views 1 answer

asked Mar 20, 2018 by anonymous

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

Last Answer : Reason is kinetic energy

290 views 2 answers

asked Mar 20, 2018 by anonymous

List different starting methods of three phase synchronous motor. Explain any one of them.

List different starting methods of three phase synchronous motor. Explain any one of them.
Last Answer : Different Starting Methods of Three Phase Synchronous Motor: As synchronous motor is not self starting, different methods of starting are as follows: 1) By using an Induction (Pony) motor 2) ... . The rotor gets pulled into synchronism and starts running at constant speed as a synchronous motor.

164 views 1 answer

asked May 7, 2020 by anonymous

For the same H.P. rating and full load speed, following motor has poor starting torque?

Last Answer : For the same H.P. rating and full load speed, following motor has poor starting torque differentially compounded.

164 views 1 answer

asked Mar 20, 2018 by anonymous

The starting resistance of a D.C. motor is generally?

Last Answer : The starting resistance of a D.C. motor is generally low.

169 views 1 answer

asked Mar 20, 2018 by anonymous

For starting a D.C. motor a starter is required because?

Last Answer : For starting a D.C. motor a starter is required because it limits the starting current to a safe value.

125 views 1 answer

asked Mar 20, 2018 by anonymous

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

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

116 views 1 answer

asked Mar 20, 2018 by anonymous

Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a?

Last Answer : Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a magnetic relay.

217 views 1 answer

asked Mar 20, 2018 by anonymous

The value of starting capacitor of a fractional horse power motor will be?

Last Answer : The value of starting capacitor of a fractional horse power motor will be 300 uF .

99 views 1 answer

asked Mar 20, 2018 by anonymous

A centrifugal switch is used to disconnect starting winding when motor has?

Last Answer : A centrifugal switch is used to disconnect starting winding when motor has picked up about 50 to 70 per cent of rated speed.

884 views 1 answer

asked Mar 20, 2018 by anonymous

The rotor developed by a single-phase motor at starting is?

Last Answer : The rotor developed by a single-phase motor at starting is zero.

90 views 1 answer

asked Mar 20, 2018 by anonymous

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

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

212 views 1 answer

asked Mar 20, 2018 by anonymous

A synchronous motor can be made self starting by providing?

A synchronous motor can be made self starting by providing?
Last Answer : A synchronous motor can be made self-starting by providing damper bar.

132 views 1 answer

asked Mar 18, 2018 by anonymous

What will happen if the induction motor runs at synchronous speed ?

What will happen if the induction motor runs at synchronous speed ?
Last Answer : Since there is always slip present in rotor it cannot run at synchronous speed no current will be developed hence no torque will developed

113 views 3 answers

asked Aug 18, 2019 by anonymous

Define Slip of Induction Motor.

Define Slip of Induction Motor.
Last Answer : Slip: It is the ratio of relative speed of rotor (difference between synchronous speed and rotor speed) to the synchronous speed of rotating magnetic field. Slip = (NS – N) / NS where , NS = synchronous speed, N = speed of rotor

59 views 1 answer

asked Aug 17, 2019 by anonymous

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

Explain the working of a single phase capacitor start induction motor.
Last Answer : Single phase capacitor start induction motor https://youtu.be/31lvvzU5Puc

414 views 2 answers

asked Jul 30, 2019 by anonymous

State any four advantages of three phase induction motor.

State any four advantages of three phase induction motor.
Last Answer : Advantages of three phase induction motor https://youtu.be/27OIOCKN05U

140 views 2 answers

asked Jul 30, 2019 by anonymous

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

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

130 views 1 answer

asked Apr 29, 2018 by anonymous

What is the slip (as a percentage) when a 6 pole single phase induction motor operating on 220 V and 60 Hz is

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
Last 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

127 views 1 answer

asked Apr 29, 2018 by anonymous

The synchronous speed of an 8 pole induction motor supplied power from a 50 Hz source will be ?

The synchronous speed of an 8 pole induction motor supplied power from a 50 Hz source will be ?
Last Answer : Ns equals f/pair pole 50/4 - 12.5

202 views 2 answers

asked Dec 31, 2017 by anonymous

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

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

139 views 1 answer

asked Oct 4, 2017 by anonymous

In the induction type directional over current relay, when a short-circuit occurs in the circuit

In the induction type directional over current relay, when a short-circuit occurs in the circuit (A) power flows in reverse direction (B) power flows in normal direction (C) directional power element does not operate (D) over current element is not energized
Last Answer : In the induction type directional over current relay, when a short-circuit occurs in the circuit power flows in reverse direction

124 views 1 answer

asked Apr 28, 2018 by anonymous

An induction meter can handle current up to?

Last Answer : An induction meter can handle current up to 100 A.

116 views 1 answer

asked Mar 21, 2018 by anonymous

A 415v, 4 pole three phase induction motor operates from supply whose frequency is 50Hz, find the stator field

Basic electrical engineering

13 views 0 answers

asked May 17, 2021 by naga surendra

Explain the working principle of induction motor.

Explain the working principle of induction motor.
Last Answer : Working principle of induction motor: * When the motor is excited with three-phase supply, three-phase stator winding carries three-phase currents & produces a rotating magnetic field of constant magnitude and ... , which tend to move the rotor in the same direction as the rotating magnetic field.

606 views 1 answer

asked May 22, 2020 by anonymous

Explain the activities carried out during weekly maintenance of 3 ph. Induction motor.

Explain the activities carried out during weekly maintenance of 3 ph. Induction motor.
Last Answer : Activities Carried out During Weekly Maintenance of 3 ph. Induction Motor: 1) Check belt tension. In cases where this is excessive it should immediately be reduces and in the case of sleeve ... and cooled by oil mist systems its important to check the oil mist flow paths/pressure components.

163 views 1 answer

asked May 7, 2020 by anonymous

State the function of following parts in Induction motor. (i) Stator (ii) Slip rings

State the function of following parts in Induction motor. (i) Stator (ii) Slip rings
Last Answer : Name of part Function Stator 1) Stator frame supports the core, terminal box and protects the inner parts. 2) Stator core houses stator winding. 3) Stator winding ... ) Provides facility to connect external resistance to rotor circuit through brushes for starting and control.

223 views 1 answer

asked May 7, 2020 by anonymous

List the energy conservation technique in induction motor.

List the energy conservation technique in induction motor.
Last Answer : Following are the list of energy conservation techniques in electrical motors: 1) Reduction in iron losses by using low loss silicon steel core material laminated to thinner dimension. 2) Using bigger length ... at light load. 13) By rewinding in induction motor 14) By motor survey

1.2k views 1 answer

asked May 3, 2020 by anonymous

With a neat sketch give the working of shaded pole induction motor.

With a neat sketch give the working of shaded pole induction motor.
Last Answer : Explanation: It has squirrel cage rotor and salient pole stator. The stator poles are shaded partially by short circuited conductor band to create the phase difference between the fluxes emerging from shaded ... rotating magnetic field in the air-gap and torque is exerted on the squirrel cage rotor.

269 views 2 answers

asked Apr 27, 2020 by anonymous

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

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

152 views 0 answers

asked Apr 16, 2020 by anonymous

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

273 views 0 answers

asked Apr 16, 2020 by anonymous

Explain energy conservation technique in induction motor by minimizing idle and redundant running of motor.

Last Answer : Energy conservation technique in induction motor by minimizing idle and redundant running of motor: 1) Loss of energy as the no load power drawn is approximately about 12% to 16% of rated ... to unnecessary line losses. 4) Reduction in overall system energy efficiency over period of time.

694 views 1 answer

asked Sep 22, 2018 by anonymous

State and explain any four factors governing selection of induction motor.

State and explain any four factors governing selection of induction motor.
Last Answer : The factors governing the selection of Induction motor: 1) Load torque required at normal speed matches with available torque of motor. 2) Break down torque or pull out torque or maximum torque ... If selecting energy efficient motor the cost benefit analysis over the long run must be worked out.

2.8k views 1 answer

asked Sep 22, 2018 by anonymous

Explain energy conservation technique “by improving power quality” for induction motor.

Explain energy conservation technique “by improving power quality” for induction motor.
Last Answer : Energy conservation method in induction motor by improving power quality: Electrical energy can be conserved by improving the power quality. It can be achieved by avoiding voltage unbalance, maintaining ... losses can be minimized by using harmonic filter thus reducing the harmonics in the system.

3.6k views 2 answers

asked Sep 22, 2018 by anonymous

Split phase induction motor

Split phase induction motor
Last 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.

233 views 1 answer

asked Sep 20, 2018 by anonymous

State starters used for i) 3-Ph squirrel cage induction motor (3HP) ii) D.C. motor

State starters used for i) 3-Ph squirrel cage induction motor (3HP) ii) D.C. motor
Last Answer : Name the starters used for following motors : i) 3 H.P. 3-Ph squirrel cage I.M: i) DOL starter OR ii) Star-Delta Starter OR ii) Auto transformer starter OR iii) Soft start starter. ii) D.C Shunt Motor : 1) Armature resistance starter (Three Point Starter) OR 2) Four Point Starter

155 views 1 answer

asked Sep 18, 2018 by anonymous

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

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

491 views 1 answer

asked May 8, 2018 by anonymous

The rotor impedance of a slip ring induction motor is (0.1 + j0.6)Ohm/ ph . The resistance/ph to be inserted

The rotor impedance of a slip ring induction motor is (0.1 + j0.6)Ohm/ ph . The resistance/ph to be inserted into rotor to get maximum torque at starting should be
Last Answer : The rotor impedance of a slip ring induction motor is (0.1 + j0.6)Ohm/ ph . The resistance/ph to be inserted into rotor to get maximum torque at starting should be 0.5 Ohm

166 views 1 answer

asked May 3, 2018 by anonymous

In an induction motor if the flux density is reduced to one-half, of its normal value then the torque will

In an induction motor if the flux density is reduced to one-half, of its normal value then the torque will (1) reduce to one-half (2) reduce to one-fourth (3) remain unchanged (4) increase four times
Last Answer : In an induction motor if the flux density is reduced.to one-half, of its normal value then the torque will reduce to one-fourth

374 views 1 answer

asked May 1, 2018 by anonymous

The speed of a three-phase induction motor is controlled by variable voltage variable frequency control

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 (1) Decreases (2) Increases (3) Remains constant (4) None of the above
Last 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

238 views 1 answer

asked May 1, 2018 by anonymous

Torque developed by a three-phase, 400V, induction motor is 100 N -m. If the applied voltage is reduced to

Torque developed by a three-phase, 400V, induction motor is 100 N -m. If the applied voltage is reduced to 200-V, the d'veloped torque will be
Last Answer : Torque developed by a three-phase, 400V, induction motor is 100 N -m. If the applied voltage is reduced to 200-V, the d'veloped torque will be 25 N -m

431 views 1 answer

asked Apr 29, 2018 by anonymous

gabriel orina · Answer 1 · 2018-08-04T04:55:44+0000

Induction motors have high starting current because its rotor was at rest thus thus it must withdraw more current to overcome rotors force of inertia.

anonymous · Answer 2 · 2019-08-18T02:35:52+0000

In induction motor , the flux produce is quadrature to the applied voltage. Since when we are going to start motor , there is no flux present inside . So in order to lets say compensate it , at first cycle of current it will produce two times of rated flux . And during that time when flux crosses rated limit , the core will saturate and it draws multiple times of current to further increase flux. So that is reason for high starting current in induction motor

Why does induction motor have high starting current?

Please log in or register to add a comment.

2 Answers

Answer :

Please log in or register to add a comment.

Answer :

Please log in or register to add a comment.

Please log in or register to answer this question.

Related Questions