[2003] Constant Voltage Permanent Magnet Wind Generator, 1. ROLNICTWO, OZE Odnawialne źródła energii
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Constant Voltage Permanent Magnet
Wind Generator
Andrew Hirzel
LE Incorporated
October 14, 2003
andy@lightengineering.com
Material
Patent Pending
Slide 1
Overview
•
Problem Description (3)
•
Geometry Construction (8)
•
Propose Solution (9)
•
Review Solution
•
Power, Voltage, Efficiency (6)
•
BEMF waveform (2)
•
Cogging (6)
•
Rotor Losses (3)
•
Axial Force (1)
Material
Patent Pending
Slide 2
Project Definition
•
Speed range: 1000 – 2000 rpm
•
Voltage range: 410 – 480 Vrms (line)
•
Machine Efficiency:
•
90% min at lightest load
•
95% min at maximum power
•
Passive Rectification to DC
Power Output Proportional to Rotor-Speed
3
•
•
Power Output 100 kW at 2000 rpm
Material
Patent Pending
Slide 3
Wind Generator Goal
Power Output and Terminal Voltage
Output Voltage, max
Output Voltage, nom
Output Voltage, min
Target Power ~ Rotor Speed Cubed
•Power ~ rotor-speed
3
500
120
•Voltage > 410 Vrms
•Voltage < 480 Vrms
100
450
80
400
60
350
40
300
20
250
0
900
1400
1900
2400
Speed, RPM
Material
Patent Pending
Slide 4
Wind Generator Goal
Power Output and Machine Efficiency
120
99%
100
97%
95%
80
Target Efficiency
Target Power
93%
60
91%
40
89%
20
87%
85%
0
900
1400
1900
2400
Speed, RPM
Material
Patent Pending
Slide 5
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