I received a power transformer that has the bottom few E-I laminations hanging down. The corner will get clamped when installed, but the legs of the 'E' will still hang down. Can anyone suggest an appropriate adhesive?
The laminations/transformer have been dipped in varnish. One thought was to use Red Insulating Varnish, but then I realized it's meant more for coatings where a thin layer can evaporate and cure. I don't know how well it will cure when clamped between laminations. So second thought was a high temp epoxy.
Any thoughts?
Thank you 🙂
The laminations/transformer have been dipped in varnish. One thought was to use Red Insulating Varnish, but then I realized it's meant more for coatings where a thin layer can evaporate and cure. I don't know how well it will cure when clamped between laminations. So second thought was a high temp epoxy.
Any thoughts?
Thank you 🙂
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Perhaps just superglue and rapid clamping. At least liquid superglue should wick in to the lamination face, and not introduce more gap between laminations.
An alternative is to make a custom clamp, or replace any existing 'corner' clamps, to physically apply force to the total available lamination faces (whilst keeping some margin distance from the winding).
I would expect the main aim is to avoid any physical buzz, as any other concerns like loss of inductance or increase in leakage inductance would be minuscule.
An alternative is to make a custom clamp, or replace any existing 'corner' clamps, to physically apply force to the total available lamination faces (whilst keeping some margin distance from the winding).
I would expect the main aim is to avoid any physical buzz, as any other concerns like loss of inductance or increase in leakage inductance would be minuscule.
Agree.
Personally I´d use Epoxy, it won´t add thickness because lamination will be clamped until it cures but follow your heart 🙂
Personally I´d use Epoxy, it won´t add thickness because lamination will be clamped until it cures but follow your heart 🙂
I have run into this occasionally. Superglue works really well and just use a clamp on that corner. Be sure the clamp has little plastic pads on the clamping surfaces (the cheapo Harbor Freight ones do).
Once the glue is dry, tape off the terminals/wires coming off the transformer then spray the lamination stack with black lacquer to cover up any white residue left behind from the super glue and to give an even appearance.
Once the glue is dry, tape off the terminals/wires coming off the transformer then spray the lamination stack with black lacquer to cover up any white residue left behind from the super glue and to give an even appearance.
I would use varnish. It will harden, it might take days or a week. But varnish will be
possible to disassemble if needed.
possible to disassemble if needed.