DocumentCode :
1926369
Title :
Precision calorimetry for power loss measurement of a very low power maximum power point tracker
Author :
Wolfs, Peter ; Li, Quan
Author_Institution :
Central Queensland Univ., Rockhampton, QLD
fYear :
2007
fDate :
9-12 Dec. 2007
Firstpage :
1
Lastpage :
5
Abstract :
Efficiency is an important performance measure for DC-DC converters. Its measurement can be extremely difficult when the DC-DC converter is highly efficient and the power loss is extremely low. The input and the output waveforms of a high frequency dc-dc converter may have high frequency components superimposed on the DC components. This further complicates the measurement process as some digital instruments tend to misbehave. Calorimetry method has been previously proposed as an alternative and indirect power loss measurement method. This paper proposes an improved calorimetry method which is capable of resolving the power loss below 2 mW. The method is demonstrated for a single-cell maximum power point tracker with a power rating of 650 mW. The experimental results confirm that the device under test presents a power loss of 24 mW +1.3 mW and the converter achieves an efficiency of 96.2% + 0.2%.
Keywords :
DC-DC power convertors; calorimetry; loss measurement; losses; DC-DC converters; calorimetry method; efficiency -0.2 percent; efficiency 0.2 percent; efficiency 96.2 percent; low power maximum power point tracker; power -1.3 mW; power 1.3 mW; power 24 mW; power 650 mW; power loss; power loss measurement; Calorimetry; DC-DC power converters; Frequency conversion; Frequency measurement; Instruments; Loss measurement; Power conversion; Power measurement; Target tracking; Testing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Engineering Conference, 2007. AUPEC 2007. Australasian Universities
Conference_Location :
Perth, WA
Print_ISBN :
978-0-646-49488-3
Electronic_ISBN :
978-0-646-49499-1
Type :
conf
DOI :
10.1109/AUPEC.2007.4548042
Filename :
4548042
Link To Document :
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