The more used type of induction motors in industry is Select one: O a No one of mentioned answers O b. Wound-rotor motor O C. Squirrel-cag motor d. Induction generator
Q: Frequency of emf in the stator of a 8 pole induction motor is 50Hz and the rotor emf frequency is…
A:
Q: The 3-phase wound-rotor induction motor has .... . a) high starting torque b) low starting current…
A: In this question , we will write induction motor starting related questions..
Q: Find the starting current (in Ampere) of 146 V DC series motor if the armature resistance = 0.6 ohm…
A: armature current of DC series motor=(terminal voltage -back emf)armature resistance+ series field…
Q: 6- Which of the following supply is given to the rotor winding of 3-Phase Induction Motor: a) DC…
A: 3 - phase induction motor problems
Q: What is the main difference between modern and classical induction motors?
A: Solution Induction Motors are generally utilized as a part of the modern application because of a…
Q: In your opinion, what happens to the rotor speed and current when mechanical load on an induction…
A: Given induction motor we have to calculate effect on rotor speed and current.
Q: The supply frequency to the stator of an 8-pole induction motor is 50 Hz, and the rotor frequency is…
A:
Q: A 3 phase, 400-V, 50 Hz 4 pole induction motor is fed from a 3-phase supply and runs of 1425 rpm.…
A: Given; 3 Phase, 400 V Induction motor f=50 HzP=4Nr=1425 rpm
Q: A 15 HP 220 V shunt motor has an armature resistance of 0.07 ohm and shunt a shunt resistance of 200…
A: We need to find out losses for given motor with given effeciency.
Q: 7- A 6-pole, 50-Hz, 3-0 induction motor is running at 950 rpm and has rotor Cu loss of 6 kW. Its…
A: Given Two multiple choice questions based on motors. Please find the below attachment for clear…
Q: Design and develop equivalent circuit model of a single phase Induction motor with th consideration…
A: It is asked to develop equivalent circuit model of a single phase induction motor.Also it is…
Q: B/ Fill in the blanks: TV ezur. 1- In a three-phase induction motor iron losses in stator will…
A: Three-phase induction motor The motor which works on the principle of electromagnetic induction is…
Q: (6) The air gap power of 440 V, 50 HZ 6 pole 3- phase induction motor is 100 KW. The rotor frequency…
A: In this question, we need to determine the rotor copper losses per phase. Air gap power is Pg = 100…
Q: the type of three-phase induction motor, which is used for high starting torque application a.…
A: In this we will write about induction motor used for high starting torque..
Q: (7) The only parts suffers from eddy currents in AC motors: a- The stator. b- The rotor. c- The…
A: 7. Answer: The stator and rotor Explanation: The rotating magnetic field and induced voltage cause…
Q: a) Why the slip of induction motor is never zero, b) What happens if the slip of induction motor is…
A: (a) Slip of induction motor will be zero ,if speed of rotor is equal to synchronous speed. For slip…
Q: How rotor winding is derived the power in the three-phase induction motor? O a. from Single phase…
A: The power flow diagram of a three phase induction motor is shown below,
Q: 26. A 4-pole, 50 Hz induction motor operates at 5% slip. The frequency of e.m.f. induced in the…
A: Given, A 3-phase induction motor with Total number of pole, P = 4 Motor supply frequency, f = 50 Hz…
Q: Explain in detail the Starting of Induction Motors
A:
Q: Name two types of induction motors.
A: Types of induction motors are given below.
Q: The frequency of the supply to the stator of an 8-pole induction motor is 50 Hz and the rotor…
A:
Q: 459. The current drawn by a 460 V dc motor of armature resistance 0.5 ohm and back emf 420 V in
A: Given a dc motor with, Input voltage, V = 460 V. Armature resistance, Ra = 0.5 ohm. Back emf, Eb =…
Q: A 3-ó induction motor has starting torque o 100% and maximum torque of 200% of full load torque. The…
A: Given values are - Tst=100% of TFLTst=TFLTMax=200% of TFLTMax=2TFL
Q: 1.In order to have sparklesscommutation, the brushes should be placed along................. 2.D.C.…
A: 1. In order to have a sparkles commutation , the brushes should be placed along MNA(magnetic…
Q: 1. Calculate the current in all branches and the voltages at all nodes for the following circuit 10…
A: Given: Op-amp circuit:
Q: What are the principle characteristics of DC series motor and DC compound motor, and what are its…
A: Introduction DC motor: DC motor converts the DC electrical input energy in the form of mechanical…
Q: A 50 Hz, 4-pole, 3 phase induction motor has a rotor current of frequency 2 Hz. Determine (i) slip…
A: given a 50 Hz , 4 pole , 3-phase induction motor has a rotor current of frequency 2Hz . here we have…
Q: The relation between armature torque and armature current of a DC motor is Parabolic Linear Inverse…
A: In a DC series motor, the armature torque is proportional to the square of the armature current. As…
Q: Why do we need to have brushes in a squirrel-cage rotor type induction motor? (short answer
A: In this question we will write about brushes in induction motor.....
Q: 2. A 2-pole, 50 Hz induction motor supplies 15 kW to a load at a speed of 2950 rpm. a. What is the…
A: Given data P=2, f=50 Hz Pload=15 kW, Nr=2950 rpm To find out We have to determine the slip, induced…
Q: A 230 V shunt motor takes a total current of 25 A. If the field winding resistance is 100N and the…
A: to determine the curent in the armature and back emf
Step by step
Solved in 3 steps
- 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 .....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) noi need the answer quickly
- A 460-V. 25-hp. 60 Hz. four-pole. Y-connected induction motor has the following impedances in ohms per phase referred to the stator circuit: RI = 0.641 ohm X1 = 1.106 ohm R2 = 0.332 ohm X2 = 0.464 ohm XM= 26.3 ohm (a) What is the maximum torque of this motor? (b) At what speed and slip does it occur? (c) What is the starting torque of this motor? (d) When the rotor resistance is doubled. what is the speed at which theQ2] 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…What do you mean by 'static', 'alternating’, and 'rotating' magnetic field? Explain the significances of the rotating magnetic field in rotary machines. What are the purposes of using starter in a three-phase induction motor? With neat diagrams, explain the operation of a Wye-Delta starter for a three phase induction motor.
- I need the answer quicklytørque 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. MISC1.5 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…
- Q3P-1).. Which of the following determine the amount of torque produced by a single-phase split-phase motor? a) The strength of the magnetic field of the stator b) The strength of the magnetic field of the rotor c) The phase angle difference between the current in the start winding and the current in the run winding d) all of the above P-2). The phase angle difference between the currents in the start winding and run winding of a single-phase split-phase motor is typically 90 degrees. a) true b) false P-3). A centrifugal switch is used to disconnect the________ winding of a non-hermetically sealed single-phase split-phase motor at approximately 75% of rated speed. a) run b) start c) either "a" or "b" d) neither "a" nor "b" P-4). Where an internal centrifugal switch cannot be used, an external______ relay can be used to perform the same function in a single-phase split-phase motor. a) hot-wire b) current c) solid-state starting d) all of the above14.a. The reason for using a laminated stator core in a universal motor is toA. limit the eddy currents and the iron losses.B. limit the saturation of the magnetic circuit.C. maintain a constant level of magnetic flux.D. decrease the doc reactance of the field winding.14.b. If an induction motor has two protective housings for capacitors, it is aA. single-voltage capacitor-start motor.B. permanent-split capacitor-start motor.C. capacitor start-and-run motor.D. dual-voltage capacitor-strut motor.