VESC Over voltage issue on Flipsky 75100 controllwer

[jlow4]

I decided to custom built my own scooter and Im having issues with the VESC software to program the controller.

I was able to get the motor spinning one but of course as soon as I decided to screw around with the settings everything fell apart.

I believe Im entering all the parameters correctly however It keeps giving me a "detection failed, Reason: Over voltage fault, check voltage is below set limit"

Main components are as followed

Customer frame designed in Autodesk Inventor and welded in my garage.
DNK Lithium battery 72V 50amp max output with 10 amp max input
UUMotors - 72v 3500w 90/65-6.5 tire - 100km/h 72v 3500w 90/65-6.5 road tire ultra scooter motor - UU Motor Retail
Flipsky 75100 controller - 14-84V 100A controller Flipsky 75100 75V 100A Single ESC Based on VESC For Electric Skateboard / Electric Scooter / Ebike Speed Controller

Has anyone ever ran into this issue?

I did go through the forum as I am new to this project slash technology but I wasent able to find an answer that satisfied my question.

 

[scianiac]

Motor settings > General > Advanced > make sure the maximum input voltage is above your battery's full charged voltage (Like 85V for your 72v nominal battery which should be 84v fully charged)

 

[jlow4]

Appreciate the quick reply.

I have the maximum input voltage currently set at 90V and still getting the same error.

 

[scianiac]

Excuse the stupid question but you set it to that and then wrote the motor config with the down arrow M button on the right command bar correct?

If you got to data analysis > realtime data and start streaming realtime data with the RT squiggly line on the right command bar what does the Volts In value read in the bottom left?

 

[jlow4]

Thank you for the advice!

Those where the parameters that I inputted but good call on checking the realtime data. My battery which you can see is a 72v battery but in the picture you can see it says real time voltage 119V. Very odd. I set the max input voltage to 120 and it seems to work now.

Is there any issue with me running this as is?

 

[amberwolf]

Maybe they installed the wrong resistor(s) for the voltage divider that feeds the MCU's voltage-monitoring pin?

 

[scianiac]

Yeah that was my thought when checking that, you can't trust flipsky to know what they are doing so they could have installed the wrong resistors or idk maybe the firmware is incorrect?

I mean I guess if you figure out what the correction factor is but idk I think there is a chance that some basic math in running the controller's FOC control loop will be wrong and it will just never run right. I would just contact flipsky.

 

[jrhowrey]

I had 4 75100 fail on me before I went with the 75200 instead