Maximum power point tracking method and device
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United States of America Patent
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Jan 18, 2005
Grant Date -
Nov 7, 2002
app pub date -
Mar 8, 2002
filing date -
Mar 9, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The output current value of a direct-current power source obtained by low-frequency, minute modulation of the input voltage of a switching converter is detected in a circuit having an amplification factor switching function that switches the amplification factor between definite magnitudes synchronizing with the modulation, and by using a signal obtained by demodulating in a discriminator circuit the output of this circuit synchronizing with the modulation to control the switching converter, the power point of the switching converter can be tracked to the maximum power point by following the change in state of the direct current power source.
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