Good day , i started a new project based on vesc board. Now i use a langfeite t8 , that Is a e-bike with two motors with 1300w each other. I buyed a ubox from spintend site and i think that this board Is a good product with 75 v and two different output for the two motors . Maybe i wrong somewhere with the configuration of motors, but there Is something that doesn t turn. As i Say the motors are inrunner type without hall sensore and from datasheet thet must give 1300w with countinuosu Power and 1800w with peak Power . I set medium inrunner type, but when i run, i see that the output Is 2400w because when the software calcs the Fox parameters, find 90A instead 40A. If i use larger Major to 6kg motors, i found 55A that maybe Is correct for the peak motor , but the performances are very lower; they are incompatibile with the performances that i had with the original analogic board.
Then i try another test, i increase the current from 90 to 130A. The performance in this case are very similar to the original board, but the ubox cuts the Power After some meters, because the voltage buttery goes down 55v during acceleration…
In my opinion i wrong the motor setting…any ideas? Thanks
But my question Is…why with the original board the e-bike has a great acceleration and with the new One Is drastically Minus. Where i wrong? Sure i stress the battery, but was the Only method to return at the same conditions.
Yes, i do the auto detect foc for each motors…i can t read the parameters, because the old board Is a chinese analogic board. My problem is that i set the current quote High, the battery goes in trouble … The old board has 35 amps as maximum current…so as Is possibile ?
I would set the “motor amps” maximum to whatever the detection says, maybe plus 10% from that.
The “battery max” current try setting that at 20A and testing it out. If it works well, keep increasing that until it doesn’t work well, then lower it a bit.
Yes, i think that the cinese board hasn t soft cut off…indeed i change It because often It has cit during acceleration, in this case there was strange sounds…and so i would try to eliminate this behaviour.
In your opinion , the auto detect fog Is able to Discover the correct parameters? For example Polar couples? Or i must open the motor to count It?
I think you max wattage is you biggest bottle neck but we need more details of the build. To give you a idea on a dule e sk8 6355 I’m useing 45A (90A at 50V 4500W) my motors are rated to 55A eatch
The 3 I suggested above are the main settings I’d play with. personally I limit the motors by amps not watts this all depends on feel and maximum settings of the motor
So i could limit Only the current, and i could set the watt to 5000w…i think that the motor couldn t arrive to this limit. The motor spec says 1300w continuos and 1800w peak.
I could Say that with 120amps the e-bike works well, but i had set 80amps as cut off battery.
