Recent content by SanPhysics

For example how to calculate required cross-section area of the toroidal core for 100VA transformer.Is that any simple formula.

Hello Jimmy Lalani Actual bare core dimension required for calculation, is your provided sizes are bare core or after transformer winding completed.please clarify.or proved primary and secondary VA rating.

Hello hardy sir Which adhesive i should use on bare core before start winding because core is old and have some rust on core.I have standard Epoxy adhesive pack which contain 2 small tubes one is resin and other is hardener.with mixing two same quantity both tube.I got jelly...

I mean How to find both primary and secondary magnet wire use how much Inner diameter (not area in cm2)of the core?

Hello hardy sir Thanks for your thought. Sir how to calculate quickly both copper winding use how much mm redious of ID.Is that any formula.

Spreadsheet result have a look. Please Zoom in https://drive.google.com/file/d/0B5ROBprWe44vaXA3RmkwczU0Mjg/view?usp=sharing

Suppose I use #17 gauge wire as per my table for primary winding so wire diameter is 1.42mm. so turn per cm2 is 10/1.42= 7.04, so 7.04*7.04=49 turn per cm2. nearly 600 turn for primary. so 600/49=12.24cm2 window are required is it right sir. no datasheet for core but manufacture test core with...

Hello dear hardy sir Thanks for your useful thought Can I don't have to consider stacking factor of core. This table an my swg table on this link https://en.wikibooks.org/w/index.php?title=Engineering_Tables/Standard_Wire_Gauge&printable=yes have very much different which table is...

Hello Hardy sir What are you doing I got new toroidal core from my friend. He want wound power transformer for him. Core size is OD-140mm, ID-90mm, Ht-50mm (M4 0.27mm CRGO) core wet about 3.3Kg.With my little knowledge an experience in transformer wounding I think This core is more than...

All your suggestion is correct.And all result as you expected. I am using only one tap at a time means 35-0-35 or 25-0-25 .so I don't have to unwrap turn.

Hello hardy sir I am completed all secondary winding As follows 35 25 0 25 35 .When I measure 35 volt winding respective 0 it showing both 35 volt is OK but when I measure 25 volt winding respective to 0 volt one 25 volt tap shows 10 volt why this happening it shows 25 0 10. attach photo of...

Hardy sir can you suggest any method to test output current of transformer so I can confirm that transformer is working properly .

Thanks for reply

Hello hardy sir Can it is compulsory to add thin copper strip on core between primary and secondary winding to avoid loss of magnatic flux. Because I can't find thin copper strip in my area .please help

Hello hardy sir So my core is not saturate in 400 va use what's your thought .I think theas charts not for toroidal core (m4 crgo)