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DIY vesc 75/300 variant power stage problem

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DIY vesc 75/300 variant power stage problem

As I mentioned in the title, I am designing a vesc75 / 300 based controller. There is a problem with my first prototypes that I cannot understand. PCB can successfully communicate with vesc tool. Real time data etc. I can reach parts. However, whenever I try to detect the motor, the connection is broken and the vesc resets itself when the power stage is supposed to work.

I think the problem is due to power stage. I suspect Mosfet drivers but not sure. If anyone has an idea, please share it with me

Thanks everyone!



one of phases, I use IRF135B203 mosfets, 4 for each phase


I use this mosfet driver. (Actually it is UCC27211)

Last seen: 3 months 2 weeks ago
Joined: 2021-03-05 13:44
Posts: 25


I hade same problem on my diy vesc and its turn out to be to week power supply. large voltage drop when motor detestion started. (i was supplying it from lab power supply 30v 5A. way to low.

Last seen: 14 hours 37 min ago
Joined: 2018-08-17 07:26
Posts: 431

Another USB/UART as well as all any low voltage signal circuits tend to be very sensitive to interference from high current/voltage. You need to route your USB connection (and any signal connection) away from the phases and DC link.



NextGen FOC High voltage 144v/34s, 30kw (