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Irfs317, I think you could have pulled off making this controller without any isolation and maybe also faster switching speeds thus less switching losses and less parts count.
Hope you were able to get it working, though! I’m jrfs3107 student from Brazil, willing to build a DC-motor controller as you have done but for a different application: I’ve just entered this universe, even studying electrical engineering, and I’ve started my own board with a gate driver, the HIP, that’s the only thing I had available I borrowed it for the photo. One important thing that would reduce ground noise much in your layout would be to tie the low side FET sources together very closely instead of doing this to the high side FET drains, a less critical point.
But, as I found out in urfs3107 of my many other controller troubleshooting sessionsslowing down the gate drive a little can sometimes help clean up noise.
I was wondering how further testing went and also if you had a bill of material you can post. Oh, and I was wondering if you had any current sensing as I didn’t notice anything that looked like that? Newer Post Older Post Home.
As long as phase current and rotor position are sampled synchronously, the speed of the slow loop can be reduced to fit the processor. Shane Colton July 7, at Thanks and again great job. Hi Shane, I really like your motor driver. Kevin April 22, at 6: I’m kind of new at this thing. Anonymous April 14, at 7: Didn’t read it through. I was looking for schematic first and itfs3107 suddenly curios TKP.
Irfs317 anything, I would have expected the FETs to take the heat in that case. What’s that blue thing? For now, here’s the full schematic:. Patrick M January 21, at 6: I’ve only tested on the bench supply, but it was able to drive about 25A before alligator clips started melting.
Once I get it hooked up properly to a battery, I’ll be able to really load test it. I hope you’ve been able to figure out the issue and get your gate driver working!
Because these are such massive FETs, they take a good microsecond to turn on and off with ohm gate resistors. Oh, and it runs on an Arduino. Shane Colton April 22, at 1: Hi Shane, I got some question on this circuit. I haven’t looked at it for a couple weeks now, but I think it’s the version that runs on the 32 bit MCU, right? Hopefully, it will just work and I can plop two of them into the snow scooter to run at 18V-ish.
I’ve tested it on a bunch of motors with no problems so far. Anonymous April 14, at 8: I ask because I have my own controller designed around a 8 bit PIC 18Fand was thinking of having some fun with some of the tastier code tidbits from your code. I appreciate your help and congrats for the blog! I’ve used the IRS drivers for my brushless controllers without isolation and they seem to work well up to 50A, but for some reason it just makes me more comfortable having an optical barrier in the circuit.
I mean the high side, is it should be a P-Channel mosfet? Hi Caio, Thanks for the kind words.
Thesis ] [ S. Hi is it possible to post the design files to a working link? But in general, I’d — glad to have a Victor alternative for other projects as well. Did I forget to mention that?
This one’s not mine, okay? It can probably handle stall current for short bursts, so I’m not too worried. It’s silly question btw. Click for full resolution image. The motors might not last that long, though.