Hello everyone,
I have a 65 kW permanent magnet electric motor with a resolver that says it should be able to produce around ~500 ft/lbs of torque. It came with its own controller/inverter and is completely CAN controlled. The electric motor is directly connected to a driveshaft to a F450 rear differential.
I am having issues getting the vehicle to accelerate, it is extremely de-rated.
At stall/very low speeds, the motor will buck/jerk until you get above a few hundred RPM. When accelerating the inverter will not draw more then 30 amps from the battery (389V nominal battery pack). It will also not go above 1000 RPM's before the inverter will shutdown. Also if I request too much torque the motor will start to jerk and slow down and the inverter will start to heat up quite rapidly. Basically requesting less torque makes it accerate faster.
Also sometimes when I turn on the inverter it will make a loud high pitch noise and will cause the battery to fault out almost immediately if I apply any load. This noise will go away if I key cycle a few times.
What makes this even more strange is that ONE time I was able to get the vehicle to rapidly accelerate, draw AT LEAST 200 amps from the battery, and travel at 1200 RPM's (32 MPH) before I had to stop. As soon as it key cycled it went back to very low power mode.
The inverter is not throwing and faults and always says that it is ready to go which makes diagnosing the issue very tricky.
Any help/suggestions would be greatly appreciated
Thanks!
I have a 65 kW permanent magnet electric motor with a resolver that says it should be able to produce around ~500 ft/lbs of torque. It came with its own controller/inverter and is completely CAN controlled. The electric motor is directly connected to a driveshaft to a F450 rear differential.
I am having issues getting the vehicle to accelerate, it is extremely de-rated.
At stall/very low speeds, the motor will buck/jerk until you get above a few hundred RPM. When accelerating the inverter will not draw more then 30 amps from the battery (389V nominal battery pack). It will also not go above 1000 RPM's before the inverter will shutdown. Also if I request too much torque the motor will start to jerk and slow down and the inverter will start to heat up quite rapidly. Basically requesting less torque makes it accerate faster.
Also sometimes when I turn on the inverter it will make a loud high pitch noise and will cause the battery to fault out almost immediately if I apply any load. This noise will go away if I key cycle a few times.
What makes this even more strange is that ONE time I was able to get the vehicle to rapidly accelerate, draw AT LEAST 200 amps from the battery, and travel at 1200 RPM's (32 MPH) before I had to stop. As soon as it key cycled it went back to very low power mode.
The inverter is not throwing and faults and always says that it is ready to go which makes diagnosing the issue very tricky.
Any help/suggestions would be greatly appreciated
Thanks!