View Single Post
Old 10-11-2014, 09:52 AM   #1190 (permalink)
MPaulHolmes's Avatar
Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
Posts: 3,832

Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000
Thanks: 1,368
Thanked 1,163 Times in 757 Posts
Originally Posted by e*clipse View Post
I looked into the temp sensor for the MGR.

It looks like it's merely a 50kOhm NTC thermistor, electrically isolated from the motor and case.

In that case, it looks like it would be pretty easy to drive it with the 5V controller supply and a 50kOhm 1% resistor in series. The microcontroller's AtoD converter would see about 2.5V at 25C. I would use the "QEI Index" pin and add this to the resolver driver board. That way all the MGR feedback information could run through this adapter.

Thoughts? Suggestions?

- E*clipse
That sounds good. We will need to figure out the best arrangement for the A/D conversions. Current1, current2, sin (), cos (), throttle, temp1, temp2. we could always do currents and angles simultaneously, and maybe every 32 times we do current1, throttle, temp1, temp2.
kits and boards
  Reply With Quote
The Following User Says Thank You to MPaulHolmes For This Useful Post:
thingstodo (10-11-2014)