010 A 240 y,4-pole shunt motor running at T000 r.p.m. gives 15 h.p. with an armaturethe useful torque (ii) the total torque (iii) useful flux per pole and (iv) iron and frictionalcurrent of 50 A and field current of 1 A. thne armature winding is wave connected and has540 conductors. The armature resistance is 0.1 52 and the drop at each brush is 1 y Gallosses

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540 conductors. The armature resistance is 0.1 2 and the drop at each brush is 1 v. find (i) the useful torque (ii) the total torque (iii) useful flux per pole and (iv) iron and frictional 010 A 240 v, 4-pole shunt motor running at 1000 r.p.m. gives 15 h.p. with an armature ourrent of 50 A and field current of 1 A. the armature winding is wave connected and has losses

540 conductors. The armature resistance is 0.1 2 and the drop at each brush is 1 v. find (i) the useful torque (ii) the total torque (iii) useful flux per pole and (iv) iron and frictional 010 A 240 v, 4-pole shunt motor running at 1000 r.p.m. gives 15 h.p. with an armature ourrent of 50 A and field current of 1 A. the armature winding is wave connected and has losses

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Similar questions

Q/ A 250 V dc series motor having armature and field resistance 0.25 ohm and 0.15 ohm respectively runs, at 800 rpm, while taking 50 A from the supply. Assuming the magnetic circuit of the motor to be unsaturated, determine its speed, when a divertor of 0.3 ohm resistance is connected in parallel with the field winding of the motor, which is subjected to a load torque whose torque (a) remains constant regardless of speed, (b) varies in direct proportion to the speed, (c) varies as the square of the speed.
The armature winding of a 4-pole, 250-V DC shunt motor is lap connected. There are 130 slots, each slot containing 8 conductors. The flux per pole is 30 mWb and the current taken by the motor is 35-A. The resistance of armature and field circuit are 0.25 and 150 ohms respectively. If the rotational losses amount to 750W. Determine the (a) gross torque in N-m, (b) useful torque in N-m and (c) the efficiency.
A 4 pole10V, DC shunt motor operates on a load current 10A, having wave connected armature with 200 conductors. The flux per Pole is 25 m Wb. Resistance of shunt field winding is 1 ohm and resistance of the armature is 0.15 ohm. d) Based on the back emf voltage value Eb= 10V, is it possible to be achievable this value? Give reason.
Q/ 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.
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.
A 220V DC shunt motordraws a no load armature current of 2.5A when running at 1400 rpm. Determine its speed when taking an armature current of 60A, if armature reaction weakens the flux by 3%.
A 4 pole, (01*10)V, DC shunt motor operates on a load current (1*10)A, having wave connected armature with 200 conductors. The flux per Pole is 25 m Wb. Resistance of shunt field winding is 1 ohm and resistance of the armature is 0.15 ohm. b) what will be the factors to minimize the back emf?
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
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 ready
A 4 pole 10V, DC shunt motor operates on a load current 10A, having wave connected armature with 200 conductors. The flux per Pole is 25 m Wb. Resistance of shunt field winding is 1 ohm and resistance of the armature is 0.15 ohm. a)What will be the factors to minimize the back emf?
A separately excited D.C motor is rated for a full load torque of 100Nm. For an applied voltage of 240V and for flux (φ) per pole of 30 mWb, the no-load and full load speeds of the motor are 1595 r.p.m and 1195 r.p.m respectively. (a) Find the armature resistance (b) If the applied voltage and the flux per pole are reduced to 200V and 20mWb respectively, Find the corresponding full load speed.
A series dc motor 20-hp, 500-V, is having armature, series field and shunt field winding resistances of 0.08 Ω, 0.3 Ω and 125 Ω, respectively. If the back – emf is 478 V, determine the motor current when the connection is a) long – shunt. b) short – shunt c) series d) shunt