Page 252 - Renewable Energy Devices and System with Simulations in MATLAB and ANSYS

Electric Generators and their Control for Large Wind Turbines 239

×10 5 Objective function evolution
18
×10 9 Total
3 16 Initial
Energy
Temp
14 Active mat
2.5
12
2 10
Cost (USD) 1.5 8 6

1 4

2
0.5
0
5 10 15 20 25
0
0 5 10 15 20 25
Step number

FIGURE 9.25 Cost function and its component evolution for the optimal design of DCE-SG 7.6 MW of
11 rpm.

×10 5 Loss evolution
2.6 Pcun
Pfe0
2.4 Pexn

2.2
2
1.8

(W) 1.6
1.4

1.2
1
0.8

0.6
5 10 15 20 25
Step number

FIGURE 9.26 Loss evolution for a 7.6 MW, 11 rpm, cos φ = 1, DCE-SG optimal design (Pcun, Pfe0, and
Pexn are copper, iron, and excitation losses, respectively).