MIT TechTV is an initiative of
Learn about MIT TechTV and check out our resource page for media makers at MIT.
MIT TechTV is an initiative of
You need Adobe Flash Player to watch videos on this site.
The maiden voyage of our electric go-kart. Our field controller (the only piece of off-the-shelf electronics on the kart) broke, so it is limited to low gear with no capacitor brake/boost. Next time...
You need to log in, in order to post comments. If you don’t have an account yet, sign up now!
Added over 2 years ago | 00:02:00 | 733 views
Added 3 months ago | 00:00:00 | 289 views
Added over 2 years ago | 00:00:13 | 2459 views
Added 1 year ago | 00:00:48 | 1121 views
Added over 2 years ago | 00:00:11 | 659 views
Added 12 months ago | 00:02:25 | 1863 views
How many FET’s are on board? 300A at 16V is a fine effort!
Posted 11 months by Anonymous
Amazingly, four TO-220 MOSFETs, at about $4 a piece, is all it takes to switch 300A at up to 48V. You need at least two sets to do a half bridge, a good heat sink, and a fast gate drive circuit, but it’s totally feasible for about $100. For reference, the FETs are IRFB3207.
300A is a peak value and only lasts for a few seconds, but the FETs stay cool even with no fan. We had a few catastrophic FET failures from switching problems, but no slow thermal load failure. So I think it can probably handle at least 200A continuous, maybe even the full 300A with a fan. I was impressed, given the cost of similarly-sized commercial controllers.
Posted 11 months by scolton