New 200A Vesc based Flipsky ESC

[Kwinty]

Okay the BLDC mode lasted 10 minutes .

So I contacted BG but no luck, they said only a 30 day warranty on diy products and you guessed it… that passed.

So I decided to become an archaeologist. And started to remove the rubber. To see what went wrong with the Vesc.

After I had removed al the rubber form the top and loosened the screws I used some compressed air to build up some pressure under the PCB to force it out. After that I continued to clean the bottom side of the PCB.

So far I have fixed the usb, that one had a loose cable inside and the extension PCB had one of the usb pins corroded away. The sensor fault isn’t fixed yet. One of the 3 current opamps stopped working. I noticed that the 3.3v was connected by a bead of solder to the 5v pin on the extension PCB under the connector. So some components where connected to 5v instead of the 3.3v. Hopefully my new current opamp will come in on Friday and fixes this issue of the error code I’m having.

[Kian]

So that is how they look inside
We have 2 here for the new build. Let’s hope they will last longer than 10 minutes.

[JENNIFER]

It is time to try HGLTECH ESC. It will not disappoint you.
https://www.aliexpress.com/item/1005001380664385.html?gps-id=pcStoreJustForYou&scm=1007.23125.137358.0&scm_id=1007.23125.137358.0&scm-url=1007.23125.137358.0&pvid=9fbd9eae-2c75-457e-b3ec-8be105342203&spm=a2g0o.store_home.smartJustForYou_650142565.5

[Kwinty]

What MOSFETs are on there? I would love to test one. Seeing the 3 shunts per phase looks like a good start.

[Kwinty]

Replacing the current measure opamp solved the issue
The Vesc works like normal again and I put it in a nice new coating. Hope I don’t have to repair it again.

Also connected some wires to the microcontroller to upload a bootloader if ever needed. if someone needs the pinout of those contacts just let me know.

[foilmore]

You made quick work of that! Not sure how many people could have done the same.

[Kwinty]

Thanks!, I actually fixed it last Friday just wanted to keep you guys posted. It still took a lot of time though. A few evenings to find the problems. Now I’m a Vesc specialist

[SoEFoil]

@Kwinty

I noticed that the 3.3v was connected by a bead of solder to the 5v pin on the extension PCB under the connector.

Did you correct this issue as well ? Is this issue present on any FSESC 200A which would mean it is a design error ?

[Kwinty]

Solved that 2, was just a crappy solder joint in combination with corrosion that somehow made a connection. Just make sure to keep this small connector PCB dry. A epoxy coat on the bottom won’t hurt and if you are careful an patient enough doing the top between the connectors would be super. I think because of the small space between the connector plastic and PCB water would stay there longer if it gets wet. Therefore have a longer time to make sure it corrodes your pins where you don’t see it at all. If you don’t use the 5v or the 3.3v you could also take these of the PCB. And just have one supply rail on there.

[SoEFoil]

Would you have a before/after type of pict to locate this potential weakness ?

[Kwinty]

I’m not sure, ill look through my pictures. Ill have to do a second one so ill be sure to capture the coating process.

[Kwinty]

While my VESC went bad I ordered a new one, if it were to happen that I could not fix it. That one came in today and I noticed that they have changed some things, at least from the outside. There are now 2 diodes across the battery input wires and the capacitors have a higher voltage rating but a lower C. So probably there were some issues with input filtering. The diodes will take care of some strange voltage spices but the lower C I don’t know why they did that. hopefully also some upgrades under the rubber but we will see when it fails (hopefully not).

[sniper]

one of the first lesson i never buy the fisrt attempt if you don’t wan’t to be a beta tester i have the same new capacitor and diodes

[JvdZ]

Maby this one is safe for 14s now… Previous models failed at 60V because of voltage spikes on the input.

[Kwinty]

I don’t think so. The mosfets NTMFS5C612NL
Is rated at 60v and i don’t think they changed that much. If you wanna know for sure open it up and check the mosfets.

ntmfs5c612nl-d.pdf

[kaya_973]

Hi

Can you show on picture what opamps you have replaced, I tried to catch it but without success.

I planned to by this model so I capitalized all good stuff

[Kwinty]

Hi,

I hoped that was visible in the photo but it’s the AD8418.
When kind of errors are you having?

Kwinty

[kaya_973]

@Kwinty

…

Thnaks for your feedabck. I did not buy it yet. I’m checking what Christmas VESC could bring !

Flipsky could be a good model … …TRAMPA As well.

[Ackermann]

Do we have any experience on 13S yet?

[tinp123]

Unfortunately, no. I don’t think it’s even worth finding out with so many high voltage, affordable (v)escs on the market nowadays.