AKPAUL-1703-M.pdf (821.43 kB)
Emulating Full Load Testing of Air-cooled Nanocrystalline IHT at Zero Power
High-power high-frequency air-cooled induction heating transformers,
mostly used as current multiplier and isolation purposes, are custom designed. For
their reliable performance and long life, the thermal evaluation at rated load
is necessary. Creating an equivalent load as test facility for reliability
testing of such type of transformer is difficult. Characteristics of such loads
drastically change after Curie temperature. Moreover, prolonged heating could
increase the nearby ambient temperature and, more importantly, the traditional heat
run test wastes large amount of energy. Whenever the coil is energized, windings
of transformer draw respective rated current; even at no load condition the copper
loss is at rated value. While both windings drawing rated current at desired
frequency, using the concept of localized eddy current loss as well as excess eddy
current loss, this article proposes a novel method to inject requisite core
loss to the magnetic circuit to emulate the characteristics of full load condition
but the power drawn from the transformer would be zero. The proposed idea would
be validated where only 200 W resonant inverter would be used to inject power
loss equivalent to full-load condition of 30 kW transformer to emulate the heat
run test.
Funding
There is no funding in this research
History
Email Address of Submitting Author
arunp26@iitbombay.orgORCID of Submitting Author
https://orcid.org/0000-0003-0941-8780Submitting Author's Institution
Electronics Devices Worldwide Private Limited, MumbaiSubmitting Author's Country
- India