IEEE Power Electronics Magazine - September 2015 - 19
0.5
0.45
0.4
0.35
Cp
0.3
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
m
(a)
v = 11 m/s
16,000
Peak Power
Curve
14,000
v = 10 m/s
Pm (W)
12,000
10,000
v = 9 m/s
8,000
v = 8 m/s
6,000
4,000
v = 7 m/s
v = 6 m/s
v = 5 m/s
v = 4 m/s
2,000
0
0
5
10
15
20
25
30
35
40
~ (rad/s)
(b)
FIG 4 (a) The power coefficient versus tip-speed ratio. (b) The mechanical power versus angular speed curves for wind speeds from 4 to
11 m/s (the example in the figure is an HASWT with rotor radius R = 3.75 m).
(a)
(b)
(c)
(d)
FIG 5 The different types of SWTs: (a) an HASWT, (b) a VASWT with a Savonius rotor, (c) a VASWT with a Darrieus H-shaped rotor, and (d) a
VASWT with a Darrieus rotor and helix-shaped blades. [Photo (a) courtesy of www.swind.pl; (b) and (c) courtesy of www.solar-constructions.com; and (d) courtesy of www.vwtpower.com.]
September 2015
z IEEE PowEr ElEctronIcs MagazInE
19
http://www.swind.pl
http://www.solar-construc
http://www.tions.com
http://www.vwtpower.com
Table of Contents for the Digital Edition of IEEE Power Electronics Magazine - September 2015
IEEE Power Electronics Magazine - September 2015 - Cover1
IEEE Power Electronics Magazine - September 2015 - Cover2
IEEE Power Electronics Magazine - September 2015 - 1
IEEE Power Electronics Magazine - September 2015 - 2
IEEE Power Electronics Magazine - September 2015 - 3
IEEE Power Electronics Magazine - September 2015 - 4
IEEE Power Electronics Magazine - September 2015 - 5
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IEEE Power Electronics Magazine - September 2015 - 11
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IEEE Power Electronics Magazine - September 2015 - 14
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IEEE Power Electronics Magazine - September 2015 - 64
IEEE Power Electronics Magazine - September 2015 - Cover3
IEEE Power Electronics Magazine - September 2015 - Cover4
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