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Old 19th March 2010, 11:24 AM   #1
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Default mounting toroid xfrmr

Instead of mounting the pwr xfrmr with a central bolt, I plan on attaching it to the bottom with several blobs of RTV. RTV is very tenacious and will provide mechanical compliance ... sort of like riding on cushions, or pillows. This should decouple chassis from any xfrmr vibration.


Rob
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Old 19th March 2010, 07:21 PM   #2
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Isn't that a kind of silicone? Will it be strong enough to hold the transformer in place, when you incline or drop the chassis or when you turn it around?
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Old 19th March 2010, 08:38 PM   #3
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wont the warming and cooling of the trafo have an adverse effect on the adhesive over time?
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Old 19th March 2010, 10:04 PM   #4
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So, is this a warning if we come round to your place? A disclaimer of liability?

Yes, you can, but it's ill-advised. It's connected to the mains, it's heavy and it may come free unexpectedly at the wrong moment, perhaps when somebody else moves the assembly without unplugging it.

Secure the tx with the securing kit which should have come with it, ensuring you do not create a shorted turn.

w
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Old 19th March 2010, 10:11 PM   #5
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If you supplement the silicone with a few cable-tie lashings it should be OK...

w
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Old 19th March 2010, 11:09 PM   #6
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Quote:
Originally Posted by albireo13 View Post
Instead of mounting the pwr xfrmr with a central bolt, I plan on attaching it to the bottom with several blobs of RTV. RTV is very tenacious and will provide mechanical compliance ... sort of like riding on cushions, or pillows. This should decouple chassis from any xfrmr vibration.


Rob
Do not "glue it" just use a bolt and put some rubber pads to isolate from chassis. Better safe than sorry!!!!
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Old 20th March 2010, 10:56 AM   #7
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I think I'll use the bolt + have it sit on several pads of RTV for vibration isolation.
RTV is actually very tenacious. I've used it in the past for attaching telescope mirrors to their supports, 8-20lb loads which are tilted 90deg. and subjected to constant movement and transport. It is also used for assembling aquarium tanks.


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Rob
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Old 20th March 2010, 05:05 PM   #8
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OK, but astronomers go to great lengths to reduce temperature cycling of their telescopes.
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Old 20th March 2010, 06:46 PM   #9
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Do you see any commercial designs with glued xformers? Wonder why?

Security first, then isolation.

Peace,
Tom E
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