(b) A 2500 V, 1200 kVA, 0.80 power factor (PF) lagging, four-pole, A-connected synchronous generator has a synchronous reactance of 1.4 Q2 and an armature resistance of 1.2 2. At 60 Hz, its friction and windage losses are 25 kW, and its core losses are 15 kW. The field circuit has a DC voltage of 220 V, and the maximum fy is 10 A. The resistance of the field circuit is adjustable over the range from 22 to 200 2. The Open Circuit Characteristic (OCC) of this generator is shown in Figure Q1(b). (0) Calculate the internal generated voltage, E4 of this machine at rated conditions. € Determine the required field current to make Vrequal to 2500 V when the generator is running at rated conditions. (iii) If this machine is operating at rated conditions, determine the input torque, TAPP that must be applied to the shaft of this generator?

(b) A 2500 V, 1200 kVA, 0.80 power factor (PF) lagging, four-pole, A-connected synchronous generator has a synchronous reactance of 1.4 Q2 and an armature resistance of 1.2 2. At 60 Hz, its friction and windage losses are 25 kW, and its core losses are 15 kW. The field circuit has a DC voltage of 220 V, and the maximum fy is 10 A. The resistance of the field circuit is adjustable over the range from 22 to 200 2. The Open Circuit Characteristic (OCC) of this generator is shown in Figure Q1(b). (0) Calculate the internal generated voltage, E4 of this machine at rated conditions. € Determine the required field current to make Vrequal to 2500 V when the generator is running at rated conditions. (iii) If this machine is operating at rated conditions, determine the input torque, TAPP that must be applied to the shaft of this generator?

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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Question

please answer qiuckly

(b) A 2500 V, 1200 kVA, 0.80 power factor (PF) lagging, four-pole, A-connected
synchronous generator has a synchronous reactance of 1.4 22 and an armature
resistance of 1.2 12. At 60 Hz, its friction and windage losses are 25 kW, and
its core losses are 15 kW. The field circuit has a DC voltage of 220 V, and the
maximum I, is 10 A. The resistance of the field circuit is adjustable over the
range from 22 to 200 2. The Open Circuit Characteristic (OCC) of this
generator is shown in Figure Q1(b).
(0)
Calculate the internal generated voltage, E4 of this machine at rated
conditions.
(ii) Determine the required field current to make Vr equal to 2500 V when
the generator is running at rated conditions.
(iii) If this machine is operating at rated conditions, determine the input
torque, TAPP that must be applied to the shaft of this generator?

2750
2500
2250
1750
1250
1900
350
500
00
13
20
10
40
3.0
FA
Figure Q1(b)
4.0
O'N
160

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