Thanks Scott....
Pretty much what I was afraid of.... Did use thermally conductive
grease when mounting the IGBT's so all the heat would go right into the
components...
I guess I should have soldered the heat sinks to the board first and
then mounted the other components....;- (
Right now the heat sinks are held in place by the mounting screw on the
IGBT so there is no problem with them coming loose... Guess at this
point it would be best to just leave them alone....
Much appreciate the help!
Best Regards,
Bob Johnson
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
Behalf Of bunnykiller
Sent: Thursday, October 30, 2008 12:14 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Soldering SISG heat sinks
Hey Bob...
In most cases, the chip is in contact with the heatsink via a heat
conductive paste and a nut and screw(depending on application, sometimes
it needs to be electrically insulated via a mica film and
bushings/inserts). soldering level temperatures(600-700degrees F) can
damage the chips....
Scot D
Johnson, Bob G. wrote:
Hi Guys,
Really feel pretty stupid asking this but not sure where else I can
go....;- (
Have built 4 of Mark Dunns awesome SISG boards and am having an awful
time trying to solder the heat sinks to the board.... Is there a trick
to this besides getting some huge wattage soldering iron? Pads and
heat
sink posts are clean and am using a flux pen for the flux.... Would I
put the components at risk if I don't solder these down?
Any thoughts would be most welcome.....
Best Regards,
Bob Johnson
* Confidentiality Notice:
This e-mail and any associated files are intended solely for the individual or entity to whom they are addressed. Please do not copy it or use it for any purposes, or disclose its contents to any other person. Further, this e-mail and any associated files may be confidential and further may be legally privileged. This email is from the Invensys Process Systems business unit of Invensys plc which is a company registered in England and Wales with its registered office at Portland House, Bressenden Place, London, SW1E 5BF (Registered number 166023). For a list of European legal entities within the Invensys Process Systems business group, please click here http://www.invensys.com/legal/default.asp?top_nav_id=77&nav_id=80&prev_id=77.
If you have received this e-mail in error, you are on notice of its status. Please notify us immediately by reply e-mail and then delete this message from your system. Thank you for your co-operation. You may contact our Helpdesk on +44 (0)20 7821 3859 / 2105 or email inet.hqhelpdesk@xxxxxxxxxxxxx This e-mail and any attachments thereto may be subject to the terms of any agreements between Invensys (and/or its subsidiaries and affiliates) and the recipient (and/or its subsidiaries and affiliates).
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla