Wind Energy Harvesting System - Energy Harvesting Autonomous Sensor Systems - page 51

40.00 mEU WINDOW1

40 mW

6.3 m/s Y -axis:

5 mW/div

X -axis:
100 Ω/div

5.6 m/s

4.5 m/s

3.8 m/s

3.5 m/s

0.00 mEU
0 EU

2.3 m/s

0 mW

800 EU

0 Ω Emulated Resistance (Ω) 800 Ω

FIGURE 2.14
Experimentally obtained power and I-V curves for various incoming wind speeds.

80.0 mEU WINDOW1

80 mW

End
Point

Y -axis:
10 mW/div

-axis:
100 Ω/div

X

Increasing
Wind Speeds

Start
Point

Rem = 150Ω

0.0 mEU
0 EU 0 mW

800 EU

0 Ω Emulated Resistance (Ω) 800 Ω

FIGURE 2.15
Performance of an MPP tracking boost converter under varying wind speeds.