Hey, everybody.
I have a question regarding the use of the VESC 100/250. I am planning to use this device for a GoldenMotor 10kW motor. These motors are sold in 48V/72V/96V/120V versions. To lower the amperage, I want to use the 96V version.
However, the battery assembly on LiFePO4 cells at 3.2V when fully charged will exceed the voltages allowed for the VESC 100/250.
For example.
Nominal cell voltage: 3.2V
Full charge: 3.65V
Discharge: 2.9V
Accordingly, I need 30 cells at the nominal rating.
30S * 3.2V = 96V
30S * 3.65V = 109.5V
30S * 2.9V = 87V
Naturally, under load the current will drop and quickly return to the nominal value.
In this case, on a 10kW motor I can use 72v with this controller, but in the future I plan to use a 20kW motor, so I would be very grateful for help and advice.
p.s. Using 72V on a 100V controller also seems inefficient to me.
In Manual its written: MAX 22S Li Ion -> 92,4V. Voltage spikes may not exceed 100V! So you can go for max 25S Lifepo Cells. You can go for the 72V Version, most motors can go for a higher rpm. Also you will have some voltage drop under load.
Link to forum post: VESC help offered for private persons and companies
Website: www.electricfox.de