A 35.2 HP, 250 V, 100 A, 1800 RPM, series DC motor with no armature reaction is considered in this problem. This motor has a series-field winding of 10 turns per pole. Its armature resistance in RA=0.05 2, and its series field resistance is Rs= 0.05 S2. The magnetization curve at 1800RPM is given by the following table: EA (V) 50 95 125 150 180 200 212 229 243 250 253 F 200 500 755 1000 1280 1500 2000 2500 3000 3500 4000 (Amp.turns) The motor is operating at rated voltage, armature current of 100 Amperes, and with rotational losses of 1500 Watt. Find the speed of the motor. Select one: Oa. None O b. Speed = 1800 RPM O c. Speed n = 1125 RPM d. Speed n = 2880 RPM

A 35.2 HP, 250 V, 100 A, 1800 RPM, series DC motor with no armature reaction is considered in this problem. This motor has a series-field winding of 10 turns per pole. Its armature resistance in RA=0.05 2, and its series field resistance is Rs= 0.05 S2. The magnetization curve at 1800RPM is given by the following table: EA (V) 50 95 125 150 180 200 212 229 243 250 253 F 200 500 755 1000 1280 1500 2000 2500 3000 3500 4000 (Amp.turns) The motor is operating at rated voltage, armature current of 100 Amperes, and with rotational losses of 1500 Watt. Find the speed of the motor. Select one: Oa. None O b. Speed = 1800 RPM O c. Speed n = 1125 RPM d. Speed n = 2880 RPM

Introductory Circuit Analysis (13th Edition)

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Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

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Section: Chapter Questions

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Concept explainers

Motor Load, Torque, and Power Quality Requirement

An electric motor is a gadget that changes electrical energy into mechanical energy over to follow up on a mechanical burden. The weight set on the motor because of this mechanical movement is known as motor load. Appropriately matching the motor burden to the engine is vital to forestall harm to the engine or wasteful and unnecessary expensive activity. Engines perform such undertakings as moving a thing starting with one spot then onto the next, cutting it, changing its shape, etc. The motors might be evaluated as far as a few variables including power yield, voltage, current, and temperature. Harm to an engine might happen when it is worked under over the top engine load contrasted with its appraised limit.

Question

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1> General > EENG492 Midterm Exam Spring 2020-2021
A 35.2 HP, 250 V, 100 A, 1800 RPM, series DC motor with no armature reaction is considered in
this problem.
This motor has a series-field winding of 10 turns per pole. Its armature resistance in RA =0.05 2, and
its series field resistance is Rs= 0.05 S.
The magnetization curve at 1800RPM is given by the following table:
EA (V)
50
95
125
150
180
200
212
229
243
250
253
F
200
500
755
1000
1280
1500
2000
2500 3000
3500
4000
(Amp.turns)
The motor is operating at rated voltage, armature current of 100 Amperes, and with rotational losses
of 1500 Watt.
Find the speed of the motor.
Select one:
O a. None
b. Speed = 1800 RPM
O c. Speedn 1125 RPM
d. Speed n = 2880 RPM

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