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How are higher VA trafo constructed differently?
How are higher VA trafo constructed differently?
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Old 15th April 2019, 11:23 AM   #1
laserscrape is offline laserscrape
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Default How are higher VA trafo constructed differently?

same ratios, but higher VA rating, how are they built differently?
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Old 15th April 2019, 11:40 AM   #2
abraxalito is offline abraxalito  United Kingdom
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Higher cross-sectional area of the core.
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Old 15th April 2019, 12:23 PM   #3
Osvaldo de Banfield is offline Osvaldo de Banfield  Argentina
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The flux density in the core is about the same. To pass more power you need more cross sectional are in the iron core and in the copper. So they are bigger. Efficiency is usually higher in higher sizes.
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Old 16th April 2019, 09:49 AM   #4
DF96 is offline DF96  England
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Bigger also means it can dissipate more heat.
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Old 16th April 2019, 12:28 PM   #5
Osvaldo de Banfield is offline Osvaldo de Banfield  Argentina
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Yes, but heat is generated in a volume while heat is transferred trough a surface. Volume increases quickier than surface.
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Old Yesterday, 06:06 PM   #6
Kay Pirinha is offline Kay Pirinha  Germany
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Higher flux density with better laminations (GOSS) allows more power and lower internal impedances at the same size.


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