2024-12-04 08:18:34 +01:00
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We are investigaing trafos that can be bought as well as the DIY trafos. See the photos of all the tested trafos so far.
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Currently considered trafos are
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Wurth CURR SENSE XFMR 1:750 40A SMD
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https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/7492540750/14617535?s=N4IgTCBcDaIOwBYCcYCsCAMdUZAXQF8g
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Wurth XFMR FLYBACK AC/DC CONV 1.6MH TH
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https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/750341689/3992735
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Power Tran. WE-UNIT Offline 175uH .85A 26Ohm
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https://eu.mouser.com/ProductDetail/Wurth-Elektronik/749118205?qs=AXuZnX5ayYSjlaXcMUJyIA%3D%3D
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AUDIO XFMR 1.6KCT / 3.2 TH
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https://www.digikey.com/en/products/detail/tamura/MET-23/285665
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Flyback Transformers 230V/6V
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https://eu.mouser.com/ProductDetail/Bourns/094931?qs=1Kr7Jg1SGW9TsHJ0%2FeggYQ%3D%3D
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MYRRA 44301 230V/6V 16VA
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https://export.farnell.com/myrra/44301/transformer-16va-6v/dp/1689092
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MYRRA 44121 230V/6V 2VA
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https://export.farnell.com/myrra/44121/transformer-2va-6v/dp/1689053
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MYRRA 44163 230V/ 2x6V 3.2VA kom
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https://export.farnell.com/myrra/44163/transformer-2-3va-230v-2-x-6v/dp/1214587
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as well as custom made trafos using cores (and corresponding coil formers)
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ETD49/25/16 N87AL 3800NH
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https://eu.mouser.com/ProductDetail/EPCOS-TDK/B66367GX187?qs=wDNl1cNI0GsHvw8cOBvW9w%3D%3D
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95 ETD Core ETD29 Ind 2900 nH 25% TOL
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https://eu.mouser.com/ProductDetail/Fair-Rite/9595293202?qs=FPho67LvealS12h1UIWe2A%3D%3D
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E20/10/6 N30
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https://eu.mouser.com/ProductDetail/EPCOS-TDK/B66311G0000X130?qs=%2FsLciWRBLmASyA8%252B9RDdOA%3D%3D
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with wires
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AWG14 / 1.67mm dia., 5690V HY, 54m
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AWG18 / 1.02mm dia., 5130V HY, 137m
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AWG24 / 0.51mm dia., 4400V HY, 549m
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AWG34 / 0.16mm dia., 2630V HY, 2220m
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2024-12-21 16:41:52 +01:00
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Due to the fact that no commercially available trafos are found that satisfy the needs of O-ESD five new trafos are produced (trafos_2024-11.jpg).
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1) Core: ETD49/25/16 with 12 isolated layers of AWG 34 wire for secondary coil.
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2) Core: ETD29/16/10 with 10 isolated layers of AWG 34 wire for secondary coil.
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3) Core: ETD29/16/10 with 20 non-isolated layers of AWG 34 wire for secondary coil.
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4) Core: EF20/10/6 with 6 isolated layers of AWG 34 wire for secondary coil.
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5) Core: EF20/10/6 with 12 non-isolated layers of AWG 34 wire for secondary coil.
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Isolation between layers is 0.2mm high-voltage isolation paper for secondary coil.
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Primary coil for each trafo is made from 2 to 16 turns of isolated wire. The number of turns is varied in order to get the best performances.
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For push-pull configuration two primaries with center-tap are made.
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