Experimental Evaluation of Power Losses in High-Power Transformer

This paper presents a simple, reliable, cost-effective, time-efficient strategy for testing a hundreds-of-kilowatts, hundreds-of-amperes transformer under rated operating conditions by phase-shifted and frequency control without the need for an expensive high-power high-current power supply and with...

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Bibliographic Details
Published in2023 IEEE Energy Conversion Congress and Exposition (ECCE) pp. 5708 - 5715
Main Authors Wan, Hongmei, Nie, Hanqing, Farkas, Tom, Ventura, Mark, Eckhardt, Chad
Format Conference Proceeding
LanguageEnglish
Published IEEE 29.10.2023
Subjects
conduction loss
Cooling
Core loss
current ripple
current sharing
DAB
DC bias
gate drive
high power transformer
Loss measurement
Power supplies
Semiconductor device measurement
switching loss
Transformer cores
transformer testing
winding loss
Windings
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Summary:This paper presents a simple, reliable, cost-effective, time-efficient strategy for testing a hundreds-of-kilowatts, hundreds-of-amperes transformer under rated operating conditions by phase-shifted and frequency control without the need for an expensive high-power high-current power supply and without any load. This rapid engineering approach can determine whether a designed transformer will perform its role in a real-world system, or whether the next design iteration is required in just one day. It provides an efficient method to differentiate transformer core and winding losses from other losses in the test system by measuring only the high accuracy average DC value on the DC bus side. The transformer thermal performance can also be evaluated since it can run continuously under rated conditions. The effectiveness of this proposed testing strategy is verified by a comprehensive evaluation of multiple 200 kW / 30 kHz transformers, requiring only a 5 kW power supply without any load.
ISSN:2329-3748
DOI:10.1109/ECCE53617.2023.10362070