Vesc X popped while powering up

Hi guys, went out for a ride, put the skate on the street, pressed the switch, immediately after that a pop occurred with some sparks. Left the skate on, and tried to spin the motors, only one worked. Brought the skate back home (switched on), scanned the Vescs for faults in the terminal, nothing. Connected the motor to the now-dead vesc, made a motor detection, puff something popped again and smoke occurred. Here are the pics of the DRV side. Clearly the chip is gone, but so are other components. What could the reason for this?

1 Like

The pic is not showing for Mee.

That battery u got? Is the polarity correct.
Have u started the board before this happened?
Is ur vesc n battery new?

1 Like

I have some difficulties uploading images. Everything worked before. I’ve changed the settings after the last ride (dialed the amps down on both Vescs). Battery is new and both Vescs are new, well they were running fine for the last 200 km.

1 Like

Any chance you have been riding in the rain lately?

1 Like

you removed the QC sticker… you can’t do that, else magic smoke will escape

6 Likes

It seems like DRV failures are very common with vescs, and this has been going since the original vesc 4. I wonder why Benjamin or anyone didn’t really step up and improved the design, because it is clearly flawed. Despite the hundreds and hundreds of improvements the vesc went through, this was was never fixed. :thinking:

Get your facts straight. The amount of hardware(not user) drv faults on V6.x are close to 0.

2 Likes

@Schulerbible juding from the black mark it looks like your regulator went poof and also took the DRV with it. Any chance you were powering something auxilliary from the vesc?

Or it could be the electrolyte cap that gave up, causing a short and a chain reaction of failure. Cant tell where that black smudge has its orgin. Can you take a pic from another angle? :face_with_monocle:

2 Likes

This was one of the first focbox Designs it had it problems yes. But Benjamin did improve 100% with vesc 6. Drvs still Pops but there is much more protection with vesc6, so this Problem is much more less now. It dont has to be a failure because of the design always, for example lose parts or Lose solder shorting something can also create this Problem. @Schulerbible I am able to repair this if you want. You are lucky your mosfets didnt blow up :slight_smile:

5 Likes

I assume that was the case here cause mine are mounted without the enclosure to a heatsink that fits into the evolve GT enclosure

1 Like

Good to know :+1:, and yes after taking a closer look, it definitely looks like a short to me.

1 Like

the solder job on the positive wire doesn’t look that great also

Blame Enertion, I have seen worse.

1 Like

Before you send it anywhere, please check that traces seem whole. If theyre blown it will be hard/impossible to fix.

1 Like

I don’t think it is worth a repair. Something went wrong and potentially have damaged other parts as well. Even though the DRV and cap can be replaced, I wouldn’t feel comfortable going ++50 kph on my board. Hence I bought a replacement fbox.