Q. A 3-phase, 240 V, 4 pole, 50 Hz, Y- connected induction motor with operating slip of 4% has the following equivalent circuit parameters referred to stator side in O/ph : (R1= 1, X1=3, Xm=50, R2=1, X2=2). The total impedance of the motor exact
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Q: A 4-pole, 3-phase, Y-connected induction motor is rated 60HZ, 208V . Its parameters are Rs 120m2, R,…
A: It is given that: f=60 HzVL=208 VRS=120 mΩ=120×10-3 ΩRr=290 mΩ=290×10-3 ΩXm=417 ΩXls=700 mΩ=700×10-3…
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A: Stator parameters R1 = 0.5ohm R2 = 0.25 ohm X1 = 0.75 ohm X2 = 0.5 ohm Xm = 100 ohm Rc =…
Q: rotor copper loss is ? motor input power is ? motor stating torque is ? motor mechanical torque is ?
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Q: 5. A 3 phase ,delta connected 410v,50HZ,6 pole Induction motor has the following per phase…
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Q: A 3 phase , Y-connected , 220 V , 10 H.P , 6 pole , induction motor has the following constants per…
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Q: A 440V, 8 poles, 50Hz, Y-connected 3-phase induction motor with the following parameters referred to…
A: Given V=440 V Poles P =8 frequency f=50 Hz Parameters refer to stator are Rs=1.55 Ohm, R’r=1.95 Ohm,…
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Q: Q2// Answer the following questions. P2 1- The power rotor input of 3-phase, 60 Hz, 4-pole induction…
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Q: Quiz 1: A 6 pole, 230V, 60 H z, Y connected three-phase induction motor has the following parameters…
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Q: A 6 pole, 230V, 60 H z, Y connected three-phase induction motor has the following parameters on a…
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Q: The equivalent circuit parameters per phase of a 3-phase, star-connected, 220V, 7.5 kW, 60Hz, 6-pole…
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Q: Q1: A: A 230 V, 50 Hz, 4 – pole single-phase induction motor has the following equivalent circuit…
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Q: A 220 V, 50HZ,4 pole, Y-connected ,design class B ,induction motor is tested in the laboratory ,with…
A: The solution can be achieved as follows.
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Q: AY-connected three-phase induction motor has the following values printed on the nameplate: 230V…
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Q: 4. With the help of a circle diagram determine (a) full load current b) power factor, c) slip d)…
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Q: losses
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Q: 230 V, 50 Hz, 4 – pole single-phase induction motor has the following equivalent circuit…
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A: Given: Vs=220Vr1+jx1=3+j3Ωr2+jx2=2+j2Ωxm=j60Ω
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Q: A 3-phase, Y-connected, 55-Hp, 460-V, 60-Hz, 4-pole wound rotor induction motor has the following…
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Q: A 3-phase 8-pole induction motor is connected to a 3-phase system with line-to-line voltage of 400V…
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Q: A 6 pole, 230V, 60 H z. Y connected three-phase induction motor has the following parameters on a…
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Q: Q. A 3-phase, 240 V, 4 pole, 50 Hz, Y- connected induction motor with operating slip of 4% has the…
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A: As given in the question Rs = 0.2Ω R'r = 0.2ΩXs = 0.8ΩX'r = 0.8ΩXm = 25Ω…
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Q: A 3-phase 2-pole induction motor is rated 190 V, 60 Hz, it is connected in Y, and has R2 = 6.6 0,…
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Q: A 440V, 3-phase , 4-pole , 50hz, 37.3 kW, wye connected induction motor has the following parameter.…
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- Design and develop equivalent circuit model of a single phase Induction motor with th consideration of core losses present with the parameter consideration of stator resistance R1 and reactance X1 and two rotor parameters which includes r2,x2 and magnetising reactance xm. (Illustration is required) Draw by hand pleaseAn 8 pole, 50 Hz slip ring induction motor runs at a slip of 2.67% on full load. The rotor resistance per phase of the winding is 0.2 ohm. What external resistance per phase must be added in the rotor circuit so that the motor now runs ate a slip of 17.33% such that the torque remains same in both the cases. (Ans: 1.1 ohm)An 3-phase induction motor(IM) has full load slip = 0.5%. If the rotor circuit resistance is increased so that R2new =2R2old, then the slip at which the motor develops the same full load torque is=.. * ......
- 6- In a stepper motor, how is the speed of rotation determined? a) By the current supplied to the motor. b) By the magnitude of the voltage applied. c) By the load applied to the motor. d) By the frequency of the waveforms used. 7- A transformer core is laminated to a) reduce hysteresis loss b) reduce eddy current losses c) reduce copper losses d) reduce all above losses 8- An induction motor with 580 r.p.m. speed at 60 Hz will have a) 8 poles b) 6 poles c) 4 poles d) 2 poles 9- If any two phases for an induction motor are interchanged a) the motor will run in reverse direction b) the motor will run at reduced speed c) the motor will not run d) the motor will burn 10- No-Load speed of which of the following motor will be highest? a) Shunt motor b) Series motor c) Short-Shunt compound motor d) Long-Shunt compound motora)the figure below shows the per-phase equivalent circuit of a two - pole three- phase induction motor operating at 50 Hz . The voltage (E1) across the magnetizing inductance is 210 v , and the slip (s) is 0.05 . What is the developed torque produced by the motor ? b) A 4 poles , 50Hz , Y-connected three phase induction motor has the per phase equivalent circuit parameters of (R1 =R2=0.12 , X1=X2=0.6 , Xm =12 ) ohm and I2 =20 (0 . Use exact equivalent circuit to determine the following at rated slip of 0.03 : I. Stator current II. Magnetizing current III. Power factor IV. Developed torque C) What is the physical meaning for each of the following induction motor parameters : R1 , R2 , Rc , X1 , X2 , Xm d) What is synchronous watt6- Which of the following supply is given to the rotor winding of 3-Phase Induction Motor: a) DC Supply b) AC Supply c) No Supply d) Pulsating Supply 7- 3-Phase Induction Motor will have Starting Torque and Starting Current a) High, High b) Low, Low. c) High, Low d) Low, High 8- Which of the following method is used for controlling the speed of an induction motor: a) Changing number of stator poles b) Supply voltage control c) Frequency control d) All the options are correct 9- Which of the following method cannot be used for starting of 3-Phase Squirrel Induction Motor: a) Star-Delta Starting b) Line resistor startling c) transformer Starter d) Rotor Resistance Starting 10- The rotor of a stepper motor has no: a) windings b) commutator c) brushes d) all of the above
- A freewheeling DC motor is driven with 1000 rpm and a nominal load torque of 80Nm. The field circuit resistance is 200 and the armature circuit resistance is 0.2 O. The field coils are fed with a zero degree transmission angle through a single-phase fully controlled converter connected to a single-phase 240V source. The armature circuit is fed from a single phase 400V source through another fully controlled converter. Magnetic saturation has been neglected, the motor constant is given as 0.8 V - s / A - rad. Assuming that there is no fluctuation in armature and field current, find the control angle of the converter feeding the armature at nominal load. If you want to leave the question blank, click again on the option you marked.1.5 A 10‐pole, 380 ‐V, 50 Hz, D‐connected three‐phase induction motor is rotating a quarry belt conveyor. The machine has the following parameters, referred to the stator, on a per phase basis: Stator Parameters Winding Resistance................0.19 Ω ......... Winding Reactance.................1.12 Ω.......... Rotor Parameters Winding Resistance......................0.29 Ω Winding Reactance.....................1.12 Ω Magnetising Reactance................................16.8 Ω Equivalent Core‐loss Resistance....................900 Ω. The friction and windage losses are 320 W. When the motor runs at its rated slip of 2.6 %. Determine: 1.5.1 The stator current. 1.5.2 Estimate the Output torque of the motor under the rated conditions. 1.5.3 The Motor…What are the various losses in an induction motor? On what factors do they depend? IV. V. List the different types of stray load losses in an induction motor.
- tørque in new Draw the power flow diagram of induction motor and explain the different power losses, the air gap power and the converted pòwer. Explain how by solving the equivalent circuit of three phase induction motor the input current, input power factor, air gap power, rotor copper loss, converted power, output power and induced torque are calculated. (b)A 440 V, 50 Hz, 2-pole, Y-connected induction motor is rated 75 KW. The equivalent circuit parameters are: R, = 0.0752 R, = 0.0652 X = 1.22 Pare = 1.1kW X, = 0.172 X, = 0.17Q Pe =150W PEAW = 1.0kW For a slip of 0.04 find the line-eurrent, the stator"power factor, the stator copper_loss, the air gap power, the converted power the induced torque and the Toad torque. MISCThe use of a series capacitor with the auxiliary windings of a single-phase induction motor permits: * The obtaintion a 90-degrees phase angle between currents in the main and auxiliary windings. The garantee a relatively high starting torque all aboveL-1). The 3-phase wound-rotor induction motor has .... . a) high starting torque b) low starting current c) both "a" and "b" d) neither "a" nor "b" L-2). The 3-phase wound-rotor induction.........a) motor has a wire wound rotor b) motor's rotor can be connected to an external resistive load by way of slip rings and brushes c) motor requires more maintenance than the 3-phase squirrel-cage induction motor d) all of the above L-3). The 3-phase wound-rotor induction motor's rotor circuit's resistance should be adjusted so it is__________ during starting. a) low b) high c) either "a" or "b" d) neither "a" nor "b" L-4). Will a 3-phase wound-rotor induction motor start with no external circuit connected to its rotor leads? a) yes b) no