What is the principle of operation of a capacitor-start capacitor-run 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: Which of the following is the correct formula to determine the rotor frequency of a 3-phase…
A: In this question , we will write induction motor questions..
Q: 4- A 3-phase A -connected 220-V (line-to-line), 60-Hz 6-pole induction motor has the following…
A: NOTE-As per the rules we can answer only 3 sub-parts, please post the remaining sub-parts as the…
Q: A 500 V, 6-pole, 50 Hz, three phase, 8.5 kW, star connected induction motor has a no load slip of…
A: Disclaimer: Since you have asked multipart questions, we will solve the first three subpart for…
Q: A 480-V, 60 Hz, 400-hp 0.8-PF-leading eight-pole delta-connected synchronous motor has a synchronous…
A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…
Q: Problem 11 A loaded shunt-wound D.C. motor operates with magnetic flux of O-0.20Wb and has an…
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Q: 250 V, d.c. shunt motor has shunt field resistance of 250 Ώ and an armature resistance of 0.25 Ώ.…
A: DC machines (Generator/ Motor) are the important parts of electrical drives. These machines are used…
Q: 28. A). What is, if any, an objection to building a 3-phase squirrel-cage induction motor with high…
A: A): Explanation: High rotor resistance will provide a high starting torque, leading to rapid…
Q: A 250 V, DC shunt motor has shunt field resistance of 250 ohm and an armature resistance of 0.25…
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Q: A 4-pole, 250-V, d.c. shunt motor has a lap-connected armature with 960 conductors. The flux per…
A: Given: For lap-wound dc shunt motor: Number of parallel paths a = Number of poles P =4, Armature…
Q: Problem 5.5: A 5000 hp, 60 Hz, 1200 rpm, 4.1 kV, 3-phase, Y-connected over- excited synchronous…
A: This problem is from synchronous machine.
Q: A 240 V, 4 -pole shunt motor has an armature resistance Of 0.42 and a field resistance of 2402. When…
A: Supply voltage (V) = 240 V No. of poles (P) = 4 Armature resistance (Ra) = 0.4 Ω Field resistance…
Q: Q6 A 250 V shunt motor on no-load runs at 1000 r.p.m. and takes 5 A. the total armature and shunt…
A: Note: We are authorized to answer the first question since the exact one wasn’t specified. Please…
Q: 5.a. A motor which is designed with nonstandard operating characteristics is classified as a A.…
A: Motor:- It converts electrical form of energy into mechanical form of energy. Fans, disk drives,…
Q: AY - connected, three-phase, 4- pole, interior permanent magnet motor with the following…
A: Note: We are authorized to answer three subparts at a time since you have not mentioned which part…
Q: 2. A 20-HP, 230-V, 1150 RAM., four pole, d5, shunt motor has a total of 620 conductors arranged in…
A: Given data power rating =20 hp=20 x 476 =14.92 kW V=230 V armature resistance Ra=0.2 ohm field…
Q: A separately-excited d.c motor has an armature resistance of 1.1Ω and the excitation circuit is…
A: Given that full load torque is 26 N-m. The armature circuit of motor is supplied by 170V. The motor…
Q: A 460 V, 60 Hz, 4-pole, 1720 rpm, Y-connected wound-rotor induction motor has the following…
A: INDUCTION MOTOR: Based on the rotor construction, the induction motor is classified into Squirrel…
Q: 4-pole, 250-V, d.c. shunt motor has a lap-connected armature with 960 conductors. The flux per pole…
A: Please refer the attached images for complete answer..
Q: The permanent magnet machines (PMM) known as "Brushless Permanent Magnet Motors", "Brushless DC…
A: The brushless dc motors and brushless permanent magnet motor are the same things. There is a…
Q: A 3-phase, 220-V, 50-Hz, 6-pole, Y-connected induction motor is operating with a per-unit slip of…
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Q: A 4-pole, 240-V., wave-connected shunt motor gives 11.19 kW when running at 1000 rpm and drawing…
A: Power = (2×pi×speed ×torque )/60. Rotational power loss = power developed by armature- power output.…
Q: 1- A 10kW, 200V, DC Shunt motor has 1-ohm armature resistance. At the starting of the motor, its…
A: Solution 1 True Back emf E is zero due to zero speed.
Q: 1- The characteristic (angular speed versus T) of a dc shunt motor is known as the External…
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Q: (a).i. Describe the construction of a DC generator. ii. Describe the principle of opeartion of a…
A: Hi! Thank you for the question As per the honor code, We’ll answer the first question since the…
Q: The label values of a three-phase Asynchronous motor are given as 50 Hp 60-Hz Y / ∆ 800V / 460V…
A: Given data, P0=50 Hp =50×746=37.3 kWcosϕ=0.85lagϕ=cos-1(0.85)=31.780IL=34A
Q: A 250 Volts shunt motor has an armature resistance of 0.5 ohm and a field resistance of 250 ohms.…
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Q: The magnetization curve of a 100-Volt series DC motor is shown in the figure below. At full-load,…
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Q: 22) A 4-pole, 240-V, lap-wound, series motor has armature and series fie resistance of 0.3 2, and…
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Q: A 6-pole, 50-Hz wound-rotor induction motor when supplied at the rated voltage and frequency with…
A: We have an Wound-rotor induction motor with, Pole = 6 frequency (f) = 50 Hz Open Circuited Voltage…
Q: Problem 11 A loaded shunt-wound D.C. motor operates with magnetic flux of D-0.20Wb and has an…
A: In this question, Loaded shunt wound DC motor Flux = 0.2 wb At a particular load speed = 800rpm…
Q: 2. A 20-HP, 230-v, 1150 RAM., four pole, d.s, shunt motor has a total of 620 conductors arranged in…
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Q: E1. Which of the following is the correct equation to determine the armature current of a DC shunt…
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Q: A 107 hp, 257 V de shunt motor has the magnetization curve in the graph. The armature circuit…
A: Construction of D.C machines Magnetic frame or yoke Pole core and pole shoe Armature core…
Q: ·A 4-pole, 250-V, d.c. shunt motor has a lap-connected armature with 960 conductors. The flux per…
A: Given: A DC shunt lap connected motor has: Poles, P=4 Voltage, V=250 V Number of conductors, Z=960…
Q: question A single-phase induction motor with a 4-pole, 50-Hz, 130-V, is rotating in the clockwise…
A: per unit slip in forward direction is Ns-NrNs. per unit slip in backward direction is Ns+NrNs.…
Q: 14) the difference between internal generated voltage and output voltage in synchronous generator…
A: As per guidelines given to us,we can only provide the solution of first question in multiple type of…
Q: 1. A 200 V shunt motor has armature and shunt field resistances of 0.15 Q and 1250, respectively.…
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Q: A 120 V shunt motor has armature and field resistances of 0.2 2 and 100 2, respectively. When no…
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Q: The armature resistance of a shunt motor fed from a 220 Volt DC source is 5 ohms and the resistance…
A: According to question: Case1) When only field winding of resistance 'R' is present:
Q: What do you mean by 'static', 'alternating', and 'rotating' magnetic field? Explain the…
A: The static magnetic field is the constant magnetic field that does not vary in space. The…
Q: A 230 V D.C. shunt motor takes 32 A at full load. The back e.m.f. on full load, if the resistance of…
A: The solution can be achieved as follows.
Q: The armature resistance of a shunt motor fed from a 220 Volt DC source is 5 ohms and the resistance…
A: Explanation: Given that, Ia = 4 A, Ra = 5 ohm, Vt = 220 volt, Tload = 7 Nm
Q: The efficiency of a 17 kW, 4-pole, 50 Hz, three-phase asynchronous motor is given as 85%. For this…
A: Given P=17 Kw, P=4, efficiency n=85%, Stator copper losses = 900 W and friction losses=1100 W
Q: A three-phase, 450 HP, 3800 V, 60 Hz, 4 pole, Y-connected synchronous motor has a synchronous…
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Q: a). Speed characteristics of dc series motor along with suitable diagram. b). Speed characteristics…
A: This question is from " ELECTRICAL MACHINE". Under which we are going to study about the performance…
Q: a 220 V dc shunt motor has armature resistance 0.23 ohm, on load it takes armature current 40 A and…
A: A DC motor is a machine which takes DC electrical energy and produces mechanical output at its…
Q: A 3-phase, 220-V, 50-Hz, 6-pole, Y-connected induction motor is operating with a per-unit slip of…
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Q: The rotor resistance and standstill reactance of a 3-phase induction motor are 0.015 Q and reactance…
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Q: 250 V dc series motor having armature and field resistance 0.25 ohm and 0.15 ohm respectively runs,…
A: According to the question we have to calculate the speed when a diverter of 0.3 ohm resistance is…
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- M1. Which of the following is the preferred method of changing the direction of rotation of a DC compound motor? a) by reversing the direction of current flow in the armature conductors b) by reversing the polarity of the magnetic field poles c) either "a" or "b" d) neither "a" nor "b M2. If the resistance of a DC motor's shunt-field circuit is increased, what happens to the speed of the motor? a) it speed decreases b) it stays the same c) it speed increases d) none of the above M3. What is a common method of controlling the speed of a DC shunt motor? a) by adding rheostat in series with the armature b) by adding rheostat in series with the shunt field c) could be either "a" and "b" d) neither "a" nor "b"19.a. The magnets that are used in the field of a quality DC PM motor are made fromA. rare-earth material.B. special aluminum-nickel compounds.C. natural magnets.D. magnetized steel.End of exam19.b. A DC motor that has interpoles will have the interpole windings inA. parallel with the armature.B. series with the field windings.C. series with the armature.D. parallel with the field windings.A 4-pole, 240V, wave connected shunt motor running at 1000 rpm and drawing armature and field currents of 50A and 1.0A respectively. It has 540 conductors. Its resistance is 0.1-ohm. Find the armature torque and flux/pole.
- A shunt motor is rotating at 1500 rpm and is powered by a 120V voltage source. The current line resistance is 51-A and the shunt field resistance is 120ohm. If the armature resistance is 0.12ohm, Determine: a) the armature current, b) the back emf (E), c) the total power that is supplied to the motor, d) the power absorbed by the armature, e) power dissipated in the armature. You have to answer all subpart not only first three subpart Either dislike is readyQ/ A de series motor on load operating at 250 V dc mains draws 25 A and runs at 1200 rpm. Armature and field resistances are 0.1 ohm and 0.3 ohm respectively. A resistance of 25 ohms is placed in parallel with the armature of the motor. Determine: (a) The speed of the motor with the shunted armature connection, if the magnetic circuit remains unsaturated and the load torque remains constant, and (b) the no load speed of the motor with the shunted armature connection.A 200 V, d.c. shunt-wound motor has an armature resistance of 0.4 Ω and at a certain load has an armature current of 30 A and runs at 1350 rev/min. If the load on the shaft of the motor is increased so that the armature current increases to 45 A, determine the speed of the motor, assuming the flux remains constant.
- A shunt motor is rotating at 1500 rpm and is powered by a 120V voltage source. The current line resistance is 51-A and the shunt field resistance is 120ohm. If the armature resistance is 0.12ohm, Determine: a) the armature current, b) the back emf (E), c) the total power that is supplied to the motor, d) the power absorbed by the armature, e) power dissipated in the armature. Please answer all subpart either dislike please I will like it pleaseI need Answer of both A & B A 6-pole, 50-Hz wound-rotor induction motor when supplied at the rated voltage and frequency with slip-rings open-circuited, developed a voltage of 100 V between any two rings. Under the same conditions its rotor is now driven by external means at (a) 700 rpm opposite to the direction of rotation of stator field, and (b) 900 rpm in the direction of rotation of stator field. Find the voltage available between slip-rings and its frequency in each of these cases.A 240V dc shunt motor has armature and field resistances 0.2 W and 320 W respectively. The motor drives a load at a speed of 950 rev min-1 and the armature current is 50A. Assuming that the flux is directly proportional to the field current, calculate the additional resistance necessary in the field circuit to increase the speed to 1100 rev min-1 while maintaining the armature current constant. Calculate the speed of the machine with the original field current and an armature current of 90A
- 5. A DC shunt motor runs at 9oorpm from a 460V supply when taking an armature current of 25 A. Calculate the speed at which it will run from a 230V supply when taking an armature current of 15A. The resistance of the armature circuit is 0.8 Ω. Assume the flux produced per pole at 230V to have decreased to 75% of its value at 460V.The full load slip of a 4-pole, 60Hz, 440V (line-to-line) three phase induction motor is 0.05. (i). What is the speed of the rotating stating? What is the frequency (in Hz) of the rotor current? (ii). When the output power of the motor is 90 hp at a speed of 1732 rmp, rotational losses (which include frictional and core losses) are 10,100W, while copper losses for both the rotor and stator total 3700W. Determine the motor efficiency and line current, assuming the motor has a 0.8pf lagging under the conditions.A dc series motor operates at its full rated load at 1500 rpm. The line condition are 125 V and 10 A. The motor has an armature circuit resistance, including the commutating field, of 1.25 ohms and a series field resistance of 0.425 ohms . Assuming that the field flux changes linearly with field current, what will be the motor speed if the load is such that the line current drops to 6.25 A?