In an induction motor if air-gap is increased

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August undefined, 2024

WebThe air gap in an induction motor should be made small so that the induction motor gives better performance. The small air gap may result mechanical problems in addition to the … Webinduction 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.

Three Phase Induction Motor Interview Questions & Answers

WebIn induction motor, higher values of ampere-conductors give rise to (a) increased copper losses leading to increased temperature rise and poor efficiency. (b) increase in overload capacity. (c) decrease in size of motor. (d) all of the above. SHOW ANSWER 16. High voltage induction motors have number of ampere-conductors. (a) large (b) small 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 … dan ryan homes ashton md

Effects of Air Gap On the Performance of Induction Motor

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 … Webmotors 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 … WebDec 1, 2024 · The longer air gap thickness between the motor stator and the rotor, the more cooling liquid flowing through the air gap, which results the heat exchange becomes better between the otor and the cooling liquid and the temperature rise of the motor is lower. dan ryan corporate office

Why does peak torque increase on increasing air gap in induction motor?

Induction Motor Objective Type Questions - Your Electrical Guide

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 … 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 … birthday party locations in dallasWebMay 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 … birthday party locations indianapolis

"WebMar 30, 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 Leakage reactance will increase Leakage flux will increase The magnetizing current will increase This will cause a poorer power factor at all loads Download Solution PDF Share … " - In an induction motor if air-gap is increased

In an induction motor if air-gap is increased

Air Gap Power in Induction Motor - Electrical Volt

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 ... WebQuestion: skewing of motor bars in a squirrel. 4 The effect of increasing the length of air-gap in eage induction motor, (SCIM) which statement an induction motor will be to increase the (a) power factor (b) speed (c) magnetising current (d) air-gap flux is false ? (a) it prevents cogging (b) it increases starting torque (c) it produces more umiform torque (a) it

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WebDec 26, 2024 · The full load torque of an induction motor does NOT depend on Q6. In case the air gap in an induction motor is increased, Q7. In squirrel-cage induction motors, the rotor slots are usually given slight skew in order to Q8. Which type of motor will work as single excited motor? Q9. WebIn an induction motor, if the air gap is increased (a) its speed will reduce. (b) its efficiency will improve. (c) its power factor will reduce. (d) its breakdown torque will reduce. [I.E.S. …

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 … 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 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. WebThe 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:

WebDec 1, 2024 · In [13], a mathematical model is derived to optimize the design of squirrel cage induction motor and obtain optimum air gap field density and optimum split ratio of squirrel cage induction...

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 … birthday party locations in orlandoWebAn 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? dan ryan expressway localWebMar 1, 2024 · Consequently, an induction motor draws a large magnetizing current (I m) to produce the required flux in the air-gap. That is why the small air-gap is preferred for the … birthday party locations in miamiWebFeb 13, 2024 · it is impossible to have zero air gap for rotating machine. The rotating machine must have the air gap for its rotation. The optimum air gap of an induction … dan ryan expressway nowWebDec 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. … dan ryan huntfield townsWebIf 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 … dan ryan homes firethorneWebIf 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 … dan ryan homes westphalia town center