R/C Tech Forums - View Single Post - ESC shutdown Experience
View Single Post
Old 06-12-2003, 02:22 AM
  #20  
schumacher
Tech Adept
 
Join Date: Aug 2001
Location: Grimsby, UK
Posts: 212
Default

okay, i spent a bit of time rigging up a rather crude test.

here's what i did.

1. ambient temperature is 20C (its regulataed in our building)
2. setup track simulation with 50% throttle (50% brake) and 100% throttle (100% brake). total run time was 5 minutes each.

speed control was a keyence zero (it has onboard fet monitoring).
and load was a centrifugal clutch device that squares the load as speed increases (similar to a proper car). Motor was Integy Matrix 12 triple

anyway run 1 with 100% throttle, temperature was 44C after running.

let both motor and speedo cool and repeated it with 50% throttle and temperature got to 54C.

let it cool

Repeated 100% throttle got, 46C

let it cool again

repeated 50% throttle got, 54C

based on that it is clear that running partial throttle heats the fets up more.

its a fairly basic test but since the only thing i changed was the throttle position i think it is conclusive.

sanj
schumacher is offline