Recent content by MPaulHolmes

Here's another video. This time, I modified the MPPT charger from the Solar Panels so the go kart can charge at about 5.6kW (in the summer), and probably around 4kW in the winter. https://www.youtube.com/watch?v=dxp8kX_golA

Here's a forward/reverse/brake all in one throttle demo, and an acceleration test at max throttle = 75amp. https://www.youtube.com/watch?v=_97xBLvRdcw

I'm not trying to show off the nissan leaf power. I would stick it in a car at 400v if I was doing that. This is to do some field weakening and saliency software tests under load. Everything on that except for the wheels was left in the neighbors yard when they moved away, by the way. I...

Disclaimer: This go-kart is not done! And my son and I only went like 5 mph, so chill! haha. Anyway, Here's a first very basic test with a Nissan leaf go kart: https://www.youtube.com/watch?v=6FUEo_TXSDg

I have been using these here: http://www.ebay.com/itm/Quantity-of-6-Powerex-CM600DY-12NF-IGBT-modules-600V-600A-NEW-IN-BOX-/281091938184 No info from beta testers. Hopefully soon I'll get metals fabbed and then I can offer kits to people. One neat thing is, I modified the code a little bit to...

Okashira! haha Yes that's right. Have you ever just typed something without thinking first? I never do that. ever. lol.

Well, the 6 pwms are square waves, but it all ends up looking like current sine waves due to the stator inductance. What is your switching frequency? For my DC controller I'm using spread spectrum 7-12kHz (it sounds like rushing water!). For the AC, I'm using 10KHz. According to the...

Man, I'm not getting updates to the thread. Sorry it took so long to get back. I just randomly checked today. I know the Leaf motor is very conservatively rated at 80kW continuous. I have been busy with my job, and I haven't heard from the Leaf guy (andrew) in a little while. My beta tester...

Andrew is one of those rural farm types that can build just about anything, and just does stuff, and all of a sudden, a whole car is built and I have no idea how he did it. haha

Here's the Nissan Leaf motor guy getting his home made dune buggy race car running! He's using 200v worth of a Chevy volt battery pack, and had set the phase current to 300amp peak for this test: https://www.youtube.com/watch?v=qUioVe_Z8is&feature=youtu.be

Ya, it's a huge cap alright, but can handle 500amp ripple current continuous (and 0.5MW power for short periods), and makes for a very low stray inductance on the current loop (< 15nH), so the IGBTs don't see large turn-off spikes. You should see the 1500uF 900v version. That makes this one...

I made a DC controller that uses 3 600v 600amp IGBTs in parallel. The power section is identical to my 3 phase AC controller power section. But instead of plugging in a 3 phase AC board, you plug in the DC board to the IGBT gate and emitter tabs. Michael (in the video) is going to use this DC...

Bowser, no updates from my beta testers. The one with the Leaf motor is getting little details worked out like ordering a hall effect throttle. Well, one update from my beta tester in Canada. He's gotten his controller up to 360amp (phase current). He has it hooked up, fighting a big AC...

haha. Well spread the word then! haha.

No, I made that one. With a cold plate, it would be good to about 200kW. Here's an instructable I put together for it: http://www.instructables.com/id/200kW-AC-Motor-Controller-for-Electric-Car/