1. nice example there! might need to make throttle volatile, and the pwm frequency might be a bit slow by modern standards, but otherwise easy to digest.
2. typically a 5-20hp motor is used, it can be TENF (totally enclosed, no fan), ODP (open drip proof), whatever. ODP tends to have better cooling but can collect junk, but is easier to add a filtered blower too so cooling isn't so rpm dependant.
3. a smaller motor is used (look at the weights of a 30kw 60hz motor!) and since it is rated at 60 hz, we overclock them to maybe 180hz or wherever the magnetic losses start dominating. aluminum housing is good, or thin steel. not those cast iron ship anchors. might want to look into the ac24ls (google ac24ls site:diyelectriccar.com ), easily makes 30kw and quite a few surplus at the moment ($300 or less), threads on here somewhere, w/180v in delta you can get ~50kw peak, 20kw continuous.
4. there are a couple open source ac kits on this site too, i,e, http://www.diyelectriccar.com/forum...er-nissan-leaf-motor-vehicle-test-171442.html http://www.diyelectriccar.com/forums/showthread.php/another-homebrew-ac-controller-45909.html
with more sophisticated control algorithms.
plus lots of ev/hybrid motors/batteries/controllers/chargers/bms/etc are making their way to the scrap yard for affordable prices, http://www.car-part.com/ ebay craigslist etc.
anyway, happy digging
2. typically a 5-20hp motor is used, it can be TENF (totally enclosed, no fan), ODP (open drip proof), whatever. ODP tends to have better cooling but can collect junk, but is easier to add a filtered blower too so cooling isn't so rpm dependant.
3. a smaller motor is used (look at the weights of a 30kw 60hz motor!) and since it is rated at 60 hz, we overclock them to maybe 180hz or wherever the magnetic losses start dominating. aluminum housing is good, or thin steel. not those cast iron ship anchors. might want to look into the ac24ls (google ac24ls site:diyelectriccar.com ), easily makes 30kw and quite a few surplus at the moment ($300 or less), threads on here somewhere, w/180v in delta you can get ~50kw peak, 20kw continuous.
4. there are a couple open source ac kits on this site too, i,e, http://www.diyelectriccar.com/forum...er-nissan-leaf-motor-vehicle-test-171442.html http://www.diyelectriccar.com/forums/showthread.php/another-homebrew-ac-controller-45909.html
with more sophisticated control algorithms.
plus lots of ev/hybrid motors/batteries/controllers/chargers/bms/etc are making their way to the scrap yard for affordable prices, http://www.car-part.com/ ebay craigslist etc.
anyway, happy digging