Electric Motor Control
10th Edition
ISBN: 9781305177611
Author: Herman
Publisher: Cengage
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Chapter 57, Problem 3SQ
To determine
Explain the procedure to obtain the subbase speed of a DC motor.
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Problem b. Suppose an anemometer mounted at a height of 10 m with a 20-m/s average wind
speed
(i) Estimate the average wind power at a height of 10 m, assuming Rayleigh
statistics and under the following weather conditions
• 15°C
(ii) Suppose a 1300-kW wind turbine with 60-m rotor diameter is located in those
winds with speed computed in the first condition of part (i). Determine the annual
energy production with a 30% wind turbine efficiency
(iii) Evaluate the wind turbine capacity factor
Q3/Using Kirchhoff's laws to determine: (6degrees)
a) The current (Irsa)
b) The voltage across the Ri (V750)
c) Calculate the power by each voltage source.
d) Calculate the power of each resistor of the network.
V3
12V
V2
R1
3V
R2
1250
Q1/For the network shown in the figure
below, Use MESH analysis and find
the current through (50) resistor.
(6degrees)
R.
- 3 Ո
20 V
R3
ΔΩ
Rs
ww
50
202
202
w
R2
Ra
142
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Electric Motor Control
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