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If it survives some more abuse testing, I’ll post the design files so you can try it out yourself. Thanks and again great job. I’ve tested it on a bunch irfs107 motors with no problems so far. Also, additionnal power capacitor bypassing for high frequencies would be crucial when trying to switch your FETs faster – cheap MLCC’s are really great for this. I hope you’ve been able to figure out the issue and get your gate driver working!
IRFS 7P MOSFET N CH 75V A D2PAK 7 5pcs on | Alibaba Group
As long as phase current and rotor position are sampled irfs31107, the speed of the slow loop can be reduced to fit the processor. I’ve been thinking of using a mountain bike tire with the side walls removed instead of a timing belt as a track.
Maybe it also makes me more careless about power-side layout, though Shane Colton April 22, at 1: Kevin April 22, at 6: Didn’t read it through. Hopefully, it will just work and I can plop two of them into the snow scooter to run at 18V-ish. Caio May 31, at 5: Thesis ] [ S.
I appreciate your help and congrats for the blog! For now, here’s the full schematic:. Hi Shane, I got some question on — circuit. Anonymous April 14, at 7: I was looking for schematic first and then suddenly curios TKP. Patrick M January 21, at 6: Irfz3107 you mind posting irgs3107 more information about it such as bill of material, eagle files and arduino sketches.
I borrowed it for the photo. 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. What I was thinking of doing sometime is modify my firmware to make a dual brushed motor control mode – that would make for a very versatile controller.
What’s that blue thing?
Shane Colton: Victor
I mean the high side, is it should be a P-Channel mosfet? Shane Colton January 24, at 5: Aside from the fact that I soldered four out of six diodes in backwards the first iefs3107, the controller so far seems to work.
Before I forget, I itfs3107 to thank you for posting your brushless controller’s source code a month or so ago – very cool and also very generous of you, Shane! Okay, so I know I said that one of the best things about building a brushed DC motor-based snow scooter was that for just this once I do not have to design a motor controller for the project But in general, I’d be glad to have a Victor alternative for other projects irs3107 well.
I get what you’re saying about isolation and ground noise. I’m kind irfa3107 new at this thing. Because these are such massive FETs, they take a good microsecond to turn on and off with ohm gate resistors. If anything, I would have expected the FETs to take the heat in that case.
No current — on this controller. Monday, January 10, Victor However, the code is virtually the same in terms of structure. Shane Colton August 25, at MA March 26, at 2: But, as Irfss3107 found out in one of my many other controller troubleshooting sessionsslowing down the gate drive a little can sometimes help clean up noise. The motors might not last that long, though. 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.