A 20 MVA, 50 Hz, 4 pole synchronous machine has inertia constant H = 9 MJ/MVA. Find the kinetic energy at synchronous speed and the accelerating torque if the shaft input is 26800 hp and the electrical power developed is 16 MW. Assume that the acceleration is constant for 15 cycles. Determine (a) the change in torque angle in that period (b) speed at the end of 15 cycles.

Q: A 6-pole, 24 KW, 120 V, DC machine has a triplex LAP-wound armature which has 72 coils with 10 turns…

A: Given A 6-pole, 24 KW, 120 V, DC machine has a triplex LAP-wound armature which has 72 coils with 10…

Q: = 0.03 N at 1140 rpm speed. The armature and field A 455 V, DC separately excited motor drives a…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: dn a For a synchronous motor, the maximum value of torque developed at an *angle of 120 degree O 45…

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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: stimate the gross torque developed

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Q: Problem 2 A 208 V, 45 kVA, 0.8 PF leading, A – connected, 60 Hz synchronous machine has a…

A: Given,  208 V, 45 KVA, 0.8 PF leading delta-connected f = 60 Hz X = 2.5 ohm Friction losses = 1.5 kW…

Q: A 140 V, DC separately excited motor drives a constant-torque load at 1000 rpm speed. The armature…

A: hi there, as per the guidelines, we answer first 3 sub parts of a query, please post Q4 as a…

Q: A dc shunt motor runs at 900 rpm from a 400V supply when taking an armature current of  25A.…

A: Given: A dc shunt motor N1=900 rpmV1=400 VIa1=25 AV2=230 VIa2=15 ARa=0.8 Ωϕ2=0.75ϕ1

Q: A 454 V, DC separately excited motor drives a variable torque load TL = 0.04 N at 1040 rpm speed.…

A: We are authorized to answer three subparts at a time. Since you have not mentioned which part you…

Q: An electric motor with a mass of 42 kg, rated speed of 3760 rpm and unbalance of 0.002 kg.m must be…

A: Given:-  Mass (m)= 42kg Speed (N)=3760rmp Unbalance =0.002 kg.m Force transmissibility =0.141…

Q: A de electrical shunt motor rated 50 kW connected to a 250 V supply is loaded as to draw 200 A when…

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Q: A 250-V shunt motor runs at 1000 rpm, at no-load and takes 8A. The total armature and shunt field…

A: We have an shunt motor which is running we have been asked to find the speed when loaded and taking…

Q: 3. A series motor having a series field resistance of 0.25 2 and an armature resistance of 0.152 is…

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Q: A DC motor has stall torque of 2 N-m (Newton*meters) and a no-load speed of 2000 RPM. With a load of…

A: Given thatN1=2000 rpmτ1=2 N.mτ2=0.5 N.m Part (a)  Assume that given motor is series motor . For…

Q: A 13kV/50Hz/50MW generator is rotated at 750 rpm. The mechanical power loss of the system is %10…

A: given data: A 13kV/50Hz/50MW generator is rotated at 750 rpm. The mechanical power loss ofthe system…

Q: 5. A 1000 r.p.m shunt generator delivers 450 A at 230 V and the resistance of the shunt field and…

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Q: Consider figure and assume that the rotational torque is 200 N-m and the radius of the rotor is 0.25…

A: Given data, Rotational torque = 200 N-m radius of rotor (r) = 0.25 m   We have been asked to find…

Q: A 220 V, DC separately excited motor drives a constant torque load at 828.11 rpm speed. The armature…

A: We are authorized to answer three subparts at a time. Since you have not mentioned which part you…

Q: The armature of a 4-pole lap wound dc motor has 850 conductors and draws an armature current of 70A…

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Q: b) A 208 V, 34 kW, 0.8 PF leading, A-connected, 60-Hz synchronous machine has a synchronous…

A: Given data,

Q: A 300V DC motor is running at 1600rpm taking a current of 40A. The armature reisistance is 0.5Ω. Due…

A: Given data: Supply voltage, V=300 V Sheet of motor, N=1600 rpm Armature current, Ia=40 A Armature…

Q: Draw the equivalent circuit of the DC generator. (b) Compute the input power and the corresponding…

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Q: HW4/A train is driven by a DC machine with independent electrical excitation. At a speed of 1500…

A: Given table,Asked to explain the,We are authorized to answer three sub-parts at a time, since you…

Q: Phase resistance and leakage inductance in the rotor are 0.15ohm and 0.6 mH, respectively. The rated…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: • the stator diameter is 40 cm. • the coil length is 40 cm. • there are 25 turns per coil. • the…

A: In the given question , we note that  The stator diametre is  = 40 cm  Coil length  = 40 cm  Number…

Q: need the answer quickly

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Q: Tutor Problem 1-21 The rotor of a four-pole induction motor rotates at 1440 revolutions per minute.…

A: Given: Induction motor,4-poleN=1440 rpmNs=1500 rpmE2=200V

Q: V DC separately excited motor has ure resistance 2 ohms and voltage constant V /rad/s. The field…

A: Note: As the question data is incomplete, still i am trying to solve it by taking some random data.…

Q: A separately excited de generator when running at 1200 rpm supplies 200 A at 125 V to a circuit of…

A: It is given that: N1=1200rpm,  Ia1=200A, V1=125 Ra=0.10 Ω N2=1000 rpm

Q: A series DC motor has a series-field winding of 25 turns per pole. Its armature resistance in 0.1 2,…

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Q: electric motor draws a current of 10 amperes with a voltage of 110 V. The output shaft develops a…

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Q: Q2)A train is driven by a DC machine with independent electrical excitation. At a speed of 1500 rpm,…

A: We are authorized to answer three sub-parts at a time, since you have not mentioned which part you…

Q: Calculate the torque in N-m exerted by a motor with 100 conductors, 5 inches long, on the armature…

A: Given Data: N = 100 conductors L = 5 inches field of intensity  = 50,000 lines per inch square  I =…

Q: 1) A long-shunt generator running at 1000 rp.m. supplies 22 kW at a terminal voltage of 220 V. The…

A: In this question,  We need to determine the copper losses, iron and friction losses and torque…