b) at half the speed. The output voltage is now 190 V The actual wind speed is lower than rated, so that the blades rotate ) What is the induced emf at rated speed? ii) What is the emf at actual speed iii) What is the actual output current? iv) What is the actual power generated?
b) at half the speed. The output voltage is now 190 V The actual wind speed is lower than rated, so that the blades rotate ) What is the induced emf at rated speed? ii) What is the emf at actual speed iii) What is the actual output current? iv) What is the actual power generated?
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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Transcribed Image Text:Please answer part B
1. This is a question about a wind turbine generator
a) The blades of a 20 kW, 400 V machine rotate at 2 revs per second at rated
wind speed
) Calculate the speed of the generator if the gear box ratio is 1:10
i Calculate the current generated at rated power
) This four pole machine has a lap wound armature consisting of 16 coils
each with a resistance of 0.3 ohms. Calculate the resistance of the
armature.
iv) Draw the circuit diagram for the generator with this armature winding
resistance and the shunt resistance is 50 ohms
V) Calculate the winding losses and hence the efficiency of the wind turbine at
rated wind speed.
b)
The actual wind speed is lower than rated, so that the blades rotate
at half the speed. The output voltage is now 190 V
i) What is the induced emf at rated speed?
ii) What is the emf at actual speed
iii) What is the actual output current?
iv) What is the actual power generated?
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