Electronics > Beginners

Heatsink Isolation

<< < (3/4) > >>

09d08:
I've just cut small pieces of copper to use as heat spreaders and the front side of the transistor rises only 6 degrees above ambient while dissipating around 20W (the highest power the IGBTs will be dissipating while in actual use). The thickness of my silicon pads also seem adequate for 310V. Thanks for all the help.

max_torque:

--- Quote from: 09d08 on June 29, 2019, 08:23:42 am ---
My testing methodology was not that scientific.....

.... The measured temperature didn't rise above ambient with the paste


--- End quote ---


I think you're test was probably flawed in some way!  (Or you have just broken the laws of physics for heat transfer.......)   :-DD

09d08:
It
--- Quote from: max_torque on June 30, 2019, 10:36:49 am ---
--- Quote from: 09d08 on June 29, 2019, 08:23:42 am ---
My testing methodology was not that scientific.....

.... The measured temperature didn't rise above ambient with the paste


--- End quote ---


I think you're test was probably flawed in some way!  (Or you have just broken the laws of physics for heat transfer.......)   :-DD

--- End quote ---

You can only get that much accuracy out of a $4 chinese infrared thermometer.

Siwastaja:

--- Quote from: 09d08 on July 01, 2019, 10:40:11 am ---You can only get that much accuracy out of a $4 chinese infrared thermometer.

--- End quote ---

You are aware of the surface emissivity, right? For example, you can't measure a shiny aluminum block with a infrared thermometer, cheap or expensive, Chinese or western. A piece of masking tape, for example, allows the IR readout of such material.

Jeroen3:
You can use aluminum oxide isolators.
AAVID THERMALLOY sells them under 4180G for example. But thickness and shape differ.
It isolates and transfers a lot better than mica or sil, at the price of fragility and cost of both bom and assembly.

https://www.shopaavid.com/Product/4180G

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod