In an induction motor if air-gap is increased

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August undefined, 2024

WebIf the air gap is increased, it will offer high resistance to magnetic flux and the stator will draw more magnetizing current from the supply to maintain the required flux in the air gap to the rotor. This will reduce the power factor of an induction motor or … WebIn an induction motor if air-gap is increased (a) the power factor will be low (b) windage losses will be more (c) bearing friction will reduce (d) copper loss will reduce. SHOW ANSWER. 6. When R 2 is the rotor resistance. X 2, the rotor reactance at ...

Design of Three Phase Induction Motor MCQ PDF

WebIf the air gap length is increased, the reluctance of the magnetic circuit will increase. This increase in the reluctance will demand more magneto-motive force to produce the required flux in the motor. To meet the additional requirement of MMF, the stator magnetizing … WebWhen air gap eccentricity exists in a motor, the air gap flux will be off balance, causing different levels of voltage to be induced onto the rotor. This results in irregular current … raymond geherty md

The Influence of Air Gap Thickness between the Stator and Rotor …

WebIn case the air gap in an induction motor is increased A. The magnetizing current of the rotor will decrease B. The power factor will decrease C. Speed of motor will increase D. … WebAir Gap Power in Induction Motor The motor converts electrical energy into the mechanical rotational energy. The input voltage is fed to the stator of an induction motor. The stator … WebMay 19, 2024 · When the air gap is eccentric, the motor is going to vibrate and make noise. While noise in and of itself is not a big deal, it is important to realize that both noise and … raymond generations 2017

In an induction motor if air-gap is increased - Examveda

In case the air gap in an induction motor is increased

WebDec 18, 2015 · 148. In induction motors, where the air-gap is usually quite small, it is necessary to correct the air-gap. permeance for the effect of slot openings. These make the permeance of the air-gap slightly smaller. than calculated from the physical gap, effectively making the gap a bit bigger. The ratio of effective. WebIn an induction motor if the air gap is increased than which of the following statement is correct Speed will decrease Power factor will decrease Power factor will increase Speed will increase This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. See Answer simplicity\\u0027s 92WebAn induction motor draws more magnetizing current as compared to the magnetizing current drawn by the transformer. This is because the reluctance of the magnetic core of the motor is more as the air gap between the stator and the rotor offers more reluctance. How to calculate the inductance of the coils in a 3-phase motor? simplicity\\u0027s 94

"WebActually Magnetizing current (I o) for induction motor is 30 to 40 %. If the air gap increases between stator and rotor then • Power factor will be lowered. • Electromagnetic torque (T … " - In an induction motor if air-gap is increased

In an induction motor if air-gap is increased

In case of the air gap in an induction motor is increased

WebIn an induction motor if air-gap is increased. A. The power factor will be low. B. Windage losses will be more. C. Bearing friction will reduce. D. Copper loss will reduce in an … WebIf the air gap of an induction motor is increased, the following will happen: The permeability of the magnetic circuit rotor-to-stator will decrease. The magnetizing inductance of the …

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WebThe most remarkable effect of the air-gap increment is the more required magnetizing current (i.e. smaller magnetization inductance). Note that the magnetizing current does … WebIf the air gap of an induction motor is increased, the following will happen: The permeability of the magnetic circuit rotor-to-stator will decrease. The magnetizing inductance of he motor thus decreases. The magnetizing current will increase. This will …

WebMay 7, 2024 · The term ‘cogging’ is associated with. Ques 12. A 50 Hz, 3-phase induction motor has a full load speed of 1440 r.p.m. The number of poles in the motor is. Ques 13. A three-phase, 50 Hz induction motor has a full load … WebMay 14, 2024 · However, an increase in air gap should also cause increase in leakage reactance, to which the maximum torque is inversely proportional. Hence its value should …

WebJan 23, 2024 · If the air gap of an induction motor increases, 1) The permeability of the magnetic circuit rotor-to-stator will decrease. 2) The magnetizing inductance of the … WebAny reduction in the supply frequency, without a change in the terminal voltage, causes an increase in the air-gap flux. Induction motors are designed to operate at the knee point of the magnetization characteristic to make full use of the magnetic material. Therefore, the increase in flux will saturate the motor.

WebThe 5 th and 7 th harmonics order current produces a resultant flux distribution in the air gap that can cause a phenomenon called cogging( Refusal to start smoothly or crawl ... A major effect of harmonic voltage and current in an induction motor is increased heating due to increased iron and copper losses at the harmonic frequencies. This ...

Webin an induction motor if airgap is increases then power factor of the motor gets decreases because the motor draws more magnetizing current which lags the voltage by a more … simplicity\u0027s 94WebThe speed of an induction motor is always governed by the rotating magnetic field in the stator. This stator field always rotates at a synchronous speed governed by two factors: 1. The number of pairs of poles. 2. The frequency of the applied voltage. The synchronous speed can be found from: simplicity\\u0027s 93WebIf the air gap of an induction motor is increased, the following will happen: The permeability of the magnetic circuit rotor-to-stator will decrease. The magnetizing inductance of the … raymond geiser attorney at lawWebDec 13, 2024 · If the air gap of an induction motor is increased, The permeability of the magnetic circuit will decrease. The magnetizing inductance of the motor will decrease. … simplicity\\u0027s 95Webinduction motors depends upon the shape of the slots (i) Open slots: In this type of slots the slot opening will be equal to that of the width of the slots. In such type of slots, assembly and repair of winding are easy. However such slots will lead to higher air gap contraction factor and hence poor power factor. raymond gee attorneyWebIn an induction motor, if the air gap is increased. (a) speed will reduce. (b) efficiency will improve. (c) power factor will be lowered. (d) breakdown torque will reduce. [GATE E.E. 1996] 6. If two induction motors A and B are identical except that the air-gap of motor ‘A’ is 50% greater than that of motor ‘B’ then. simplicity\\u0027s 90Webmotors are sometimes built as single phase induction-run motors and these have no starting torque and have rather less torque for a given stator B-field. (You do experiments on two … raymond generations cabernet