auraslip
10 MW
- Joined
- Mar 5, 2010
- Messages
- 3,535
Ok. So the frame shocks me and displays voltage on the meter. I can't seem to find any direct connection to the 48v system. Normally I wouldn't care but the car has fried 3 after market controllers and navitas has stated that it is most likely because the car has a short or is frame grounded.
ALL of these Chinese carts seem to show voltage on the frame and i need to get this sorted. EZGO, CLUB CAR, and YAMAHA don't have these issues. Probably because they're designed by actually EEs and not some chinese dude named 'lance.' Also godbless Curtis. I've had zero problems with their controllers and their documentation is great.
capacitative coupling (would frame show pack voltage?) (would the car have to be running?)
motor brush dust builds up on top of batteries and provides voltage path to frame(i see this all the time on flooded batteries when they are overfilled and leak out. we use sealed though)
motor, controller, dc/dc reducer shorted
frame intentionally grounded somewhere in the car (would not be surprised if the OEM did this lmao)
I don't think the frame is permanently grounded because the shock is instantaneous like a capacitor. Leads me to believe maybe other brands of golf carts have some sort of high value resistor from frame to ground to bleed off this stray voltage.
Any thoughts?
ALL of these Chinese carts seem to show voltage on the frame and i need to get this sorted. EZGO, CLUB CAR, and YAMAHA don't have these issues. Probably because they're designed by actually EEs and not some chinese dude named 'lance.' Also godbless Curtis. I've had zero problems with their controllers and their documentation is great.
capacitative coupling (would frame show pack voltage?) (would the car have to be running?)
motor brush dust builds up on top of batteries and provides voltage path to frame(i see this all the time on flooded batteries when they are overfilled and leak out. we use sealed though)
motor, controller, dc/dc reducer shorted
frame intentionally grounded somewhere in the car (would not be surprised if the OEM did this lmao)
I don't think the frame is permanently grounded because the shock is instantaneous like a capacitor. Leads me to believe maybe other brands of golf carts have some sort of high value resistor from frame to ground to bleed off this stray voltage.
Any thoughts?