Guru
Joined: 22/10/2019
Location: AustraliaPosts: 955
| Posted: 03:19pm 12 Mar 2021 |
I'm still slogging along and making slow progress.
I just picked up another 3kW AeroSharp and have unwound the transformer ready to wind #2 Tx (second biggest) transformer.
Something that I do not recall having seen mentioned anywhere in all the threads on the Ozinverter and Warpinverter is that there can be two quite different size 3kW toroids.
As you'll see in the photos, some have an OD of 205mm while others are only 185mm OD.
The ID and height are the same at 100mm ID and 70mm high.
Obviously that makes quite a difference for the cross sectional area ... and for me, if I'm going to go to all this trouble winding transformers, I might as well go as big as possible.
I've got two of each type ... and the smaller one has a paper label on a blue plastic tape that's wrapped all the way around and the larger has an off white paper label.
The tx on the right is one of the larger cores and has been unwound now.
This is the label from the smaller toroids stuck on blue plastic tape.
And this from the larger toroid made by Eaglerise Electric.
These are more of a pain to unwind as they are actually wound with three wires being wrapped at the same time ... and invariably one wire gets trapped under an adjacent winding and you have to be pretty rough to extract them. I do worry about damage to the insulation in this case.
