View Single Post
Old 10-10-2018, 02:13 PM   #3289 (permalink)
thingstodo
Master EcoModder
 
Join Date: Sep 2010
Location: Saskatoon, canada
Posts: 1,488

Ford Prefect - '18 Ford F150 XLT XTR

Tess - '22 Tesla Y LR
Thanks: 749
Thanked 565 Times in 447 Posts
Quote:
Originally Posted by Piotrsko View Post
I thought the spec stated you can run 400a @ rated V for a 92 degree temp rise.
First line collector current.
I think that is for the raw IGBT, and depends on how well the heat sink takes away the heat ... Maybe not?

Quote:
My swag rule of thumb, 15 seconds tops. My experience is voltage didn't seem to make much thermal difference, or I cant measure it using basic homebrew equipment.
The voltage does not appear to affect heat. But reflected waves and switching transients do appear to ... amplify? .. the voltage. If you keep your bus voltage to half or less, the IGBTs appear to survive
__________________
In THEORY there is no difference between Theory and Practice
In PRACTICE there IS!
  Reply With Quote