Q3)discuss two only : a) the magetising current (Im) of 3-phase motor b) how will you design the rotor of a squirrel cage motor to have low starting current c) the advantages and disadvantages of capasitor start,capasitor run of single phase motor
Q: Q1: A single-phase induction motor is rotating at a speed of 1790 rpm. Its rated nameplate is;…
A: Forward slip=Ns-NrNs. Reverse slip=Ns+NrNs. Where Ns is the sycronous speed Nr is roror speed.
Q: At single phase induction motor, with R1 = 9 ohm, blocked rotor test reading: Isc = 4 A, Vsc = 80 V,…
A: as per our guidelines we are supposed to answer only one question. Kindly repost other questions as…
Q: b. Sketch typical torque - speed characteristics for the following classes of Single-Phase Induction…
A: Given following cases of single phase induction motor: Capacitor-Start Induction motor…
Q: A 3-phase 440V, wye connected induction motor has a star-connected stator and delta connected rotor…
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Q: 1. The distance of air gap between stator and rotor range from ------- to depend on Motor's power.…
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Q: A 400-V, 15-hp, 50-Hz, six-pole, A-connected induction motor has the following impedances in ohms…
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Q: z, four-pole, induction motor connected in star
A: Three Phase Induction machine-This Induction machine comprises of rotor and stator as it basic parts…
Q: A three phase induction motor with supply frequency of 60 Hz , 6 poles. If the slip is 5 % at a…
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Q: A 4-pole, 3-phase, 50 Hz, slip-ring induction motor rotates at 1440 r.p.m. With slip-ring terminals…
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Q: E-a). Which of the following is/are a type of single-phase multi-speed motor? a) consequent-pole…
A: According to guidelines we need to solve only the first question. According to the question, Which…
Q: Using only the parts needed, wire a DC motor in a short-shunt cumulative compound configuration with…
A: Since we only answer one question at a time. we’ll answer the first question only.Please resubmit…
Q: |A 415V, 50HZ, delta-connected, 4-pole, squirrel cage induction motor has a per- phase equivalent…
A: Given circuit is = Given values are =
Q: A three-phase induction motor used for a commercial application in Oman runs at 586 rpm at no load…
A: Given Data N = 586 full load speed = 546 oman frequency = 50 Hz
Q: 3-phase 3730W, 220V, 6-pole and 50 Hz induction motor operates at full load with a slip of 0.025.…
A: Power developed = output power + friction + windage losses and stray load losses. Airgap power =…
Q: discuss a) the magetising current (Im) of 3-phase motor b) how will you design the rotor of a…
A: Electrical machines can be either generator or motors. They can be either Ac machines or DC…
Q: A three phase synchronous motor of 50Hz, has the stator winding with pitch angle of 15O,…
A: Given data: B=90 mWb/cm2A=2 cm2f=50 HzN=1500γ=15oq=10ε=20o Note: As per our policy, I have…
Q: 3. Compare 3 phase synchronous motor with 3 phase induction motor as regards : (i) cost and size , (…
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Q: A 6-pole, wound induction motor operates from a 3-phase , 50 Hz supply. The rotor parameters are…
A: It is given that: P=6f=50 HzR2=0.192X2=0.552
Q: With neat diagram explain slip ring rotor of 3 phase induction motor. Also draw and explain the…
A: Construction of slip ring 3 phase induction motor: Diagram os slip ring rotor:
Q: AY-connected three-phase induction motor has the following values printed on the nameplate: 230V…
A: Note: We are authorized to answer three subparts at a time since you have not mentioned which part…
Q: 4-24- A three-phase, 335-hp, 2000-V, six-pole, 60-Hz, Y- connected scuirrel-cage induction motor has…
A: As we have given: Q=335 hpV=2000 VP=6f=60 Hzr1=0.2 Ωr2'=0.203 Ωre=450 Ωx1=0.707 Ωx2=0.707 Ωxϕ=77…
Q: Explain the D.C resistance test to find the value of stator resistance of the star and delta…
A: DC Resistance Test:In the event that a DC voltage is applied to the stator terminals, there will be…
Q: The rotor resistances per phase of a 4-pole, 50-Hz, 3-phase induction motor are 0.024 ohm and 0.12…
A: Given information are: Rotor Resistance,R2=0.024Ω Rotor Reactance,X2=0.12Ω Number of poles of…
Q: The 3-phase squirrel-cage induction motor has a poorer starting torque than might be expected based…
A: Solution: Torque of an induction motor depends on rotor reactance and rotor resistance. Torque of an…
Q: 25: For a three-phase induction motor, explain briefly the following with mention the necessary…
A: We are authorized to answer three subparts at a time since you have not mentioned which part you are…
Q: Example 6: A 3-phase, 400-V, star-connected induction motor has a star-connected rotor with a stator…
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Q: A 400-V, 18-hp, 50-Hz, four-pole, A-connected induction motor has the following impedances in ohms…
A: The data given in the question is: 400V,18hp, 50Hz,4 pole, ∆, R1=0.5Ω, X1=1Ω, R2=0.4Ω, X2=1.2Ω,…
Q: A 110-V, 50-Hz single phase induction motor (split -phase) has the following constants for the main…
A: In split phase induction motor main winding and auxiliary winding are connected in parallel. At the…
Q: Q4. What do you mean by circle diagram of a 3-phase induction motor? Answer the following: (i) (ii)…
A: A circle diagram, a graphical representation of the performance of an electrical machine. This is…
Q: parameters of the exact equivalent circuit for a three-phase, connected, 400-V, 10-hp, 50-Hz,…
A: As per Bartleby guidelines we are allowed to solve only one question with maximum three subparts,…
Q: 5. What are the various methods of speed control of 3-phase induction motor?
A: Various speed control methods are possible for the three phase induction motor. such methods are…
Q: Q2 i) Explain with sketch the working of the three phase slip ring Induction Motor with a special…
A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…
Q: 4-24- A three-phase, 335-hp, 2000-V, six-pole, 60-Hz, Y- connected scuirrel-cage induction motor has…
A: Induction Machine: An induction machine is basically a rotating machine. It is either to convert…
Q: Ans[ 0.242] An 8-pole, 50HZ, 3-phase slip ring induction motor has an effective rotor resistance of…
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Q: Q5 : For a three-phase induction motor , explain briefly the following with mention the necessary…
A: Note: Since you have posted a question with multiple subparts, we will solve the first three…
Q: a) the magetising current (Im) of 3-phase motor b) how will you design the rotor of a squirrel cage…
A: Electrical machines can be either generators or motors. They can be either Ac machines or DC…
Q: The no- load speed of 3=phase, 4-pole, induction motor connected to a 3-phase 50HZ .supply is…
A: Three phase induction motor-When a three-phase stator displaced by 120 degrees (in space of 120…
Q: What is the reason of the high starting current in the 3-phase induction motor? Explain in short.
A: Solution: The approximated equivalent circuit of the three-phase induction motor is, From the…
Q: 5- The rotor voltage per phase of a slip-ring star connected induction motor is 289.5 V. The rotor…
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Q: The 3-phase squirrel-cage induction motor has a poorer starting torque than might be expected based…
A: Torque of an induction motor depends on rotor reactance and rotor resistance. Torque of an…
Q: Q3: a- Draw the equivalent circuit of three phase induction motor referring all parameters primary…
A: 3-phase Induction Motor- When a three-phase stator displaced by 120 degrees (in space of 120…
Q: he 3-phase 3730W, 220V, 2-pole and 50 Hz induction motor has a slip of 0.025 at full load. The…
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Q: Q2: A single-phase induction motor with a 4-pole, 50-Hz, 130-V, is rotating in the clockwise…
A: Slip=Ns-NrNs. Nr is rotor speed Ns is sycronous speed of rotating magnetic field. Forward slip is…
Q: A 415V, 50HZ, 3-phase induction motor supplies its rated power to a b) constant load. The rated…
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Q: 1- A 6- pole, 50 Hz 3-phase induction motor has a full load slip of 4 percent resistance and…
A: In given question P =6 f = 50 Hz full load slip = 4% r2 = 0.24 ohm X2 =2 ohm s =NS-NNS where s =…
Q: single-phase induction motor is rotating at a speed of 1790 rpm. It ameplate is; 150-V, 60-Hz,…
A: In this question, single phase induction motor is given..We have to find its slip in forward…
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- L-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) noDesign 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 pleaseQ2] Fill in the blank (9 Marks) 1-The current drwan by the armature of D.C. motor is directly proportional to 2- The speed of a D.C. shunt-wound motor will shunt field regulator is increased. 3- The synchronous speed of a three-phase induction motor is number of pairs of poles. Rotor copper losses Rotor input power in induction motor = 5- A 4-pole three-phase induction motor has a synchronous speed of 25 r.p.s. The frequency of the supply to the stator is_ Hz. 6- The power input to a mains transformer is 200VA. If the primary current is 2.5A, the secondary voltage is 2V and assuming no losses in the transformer, the turns ratio step down. is 7- A 200kVA transformer has an iron loss of 1 kW and full load cu loss of 2 kW. Its load kVA corresponding to maximum efficiency is kVA. 8- If cu loss of a transformer at 7/8th full load is 4900 W, then its full-load cu loss would be watt. 4- if the value of resistance of the proportional to the 9- The slight curvature at the lower end of the open…
- 6- 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 aboveA wound rotor, induction motor has a rotor resistance of 0.6 ohms per phase and a rotor leakage reactance of 8 ohms.a)What is the operating speed (rpm) of this 2-pole induction motor fed from a 50Hz supply if the slip is 5%?b)If maximum torque occurs when R2 = sX2, what is the slip at maximum torque?c)What resistance must be added to the rotor circuit to give maximum startingtorque?a) the magetising current (Im) of 3-phase motor b) how will you design the rotor of a squirrel cage motor to have low starting current
- B/ Fill in the blanks: TV ezur 1- In a three-phase induction motor iron losses in stator will be..... that in rotor. 2- In three-phase induction motors sometimes copper bars are placed deep in the rotor to........... 3- Blocked rotor test on induction motors is used to find out. R..., ke, X. 4- The maximum torque in an induction motor depends on .............and .....The rotor of the 4-pole three-phase squirrel cage induction motor has been replaced with the rotor of the three-phase 4-pole rotor wound induction motor. When the motor is fed with normal supply, the machine will a) Does not work b) Runs at a very slow pace c) Runs at slightly lower speed than normal speed d) Runs at a slightly higher speed than normal speed e) none1- To control the speed of an induction motor, the supply frequency is reduced by 10%. For the same magnetizing current to remain constant, the supply voltage must be....... a) Reduced by 10%, b) Reduced by 20%, c) Increased by 10%, d) Increased by 20% 2. When maximum starting torqua ic ohtoinod
- a) Why the slip of induction motor is never zero, b) What happens if the slip of induction motor is one, c)What is the value of the slip for an induction motor at no load and full load.7- A 6-pole, 50-Hz, 3-0 induction motor is running at 950 rpm and has rotor Cu loss of 6 kW. Its rotor input is......kW (a) 120 (b) 60 (c) 6.3 (d) 66 8- The number of slip rings on a squirrel cage induction motor is usually (a)Two (b) Three (c) Four (d) NoneQ2 ) A 220-V, 1.5-hp 50-Hz,wo-pole, capacitor-start induction motor has the following main-winding impedances: R1=1.40 2 X1=2.01 S Xm= 105 2 R2 = 1.50 2 X2=2.01 S2 At a slip of 0.05, the motor's rotational losses are 291 W. The rotational losses may be assumed constant. . Find the following quantities for this motor at 0.05 slip: (b) Stator Power factor (e)Pout (f) Tele (a) Stator current (d) PAG (c) Input Power (g) TL (h) Pconv (i) Efficiency