I bought two of these modules to use with a set of 24V DC gear motors from an electric wheel chair. Both were firmly mounted to a board & had 680uF caps installed. However very quickly after operating both motors one of the drives has failed.
This was during a sharp motor reverse, so i would have expected a current and voltage spike however I would have expected that to be well within the capabilities of the drive as the motors were just operating in free air with no load except the wheels inertia. The other drive has continued to operate fine, even performing the same harsh direction changes, the motor the failed drive connected to is not stalled and works fine when I apply 24V from the SLA batteries across it. I can hear a small hum from the drive when I try to drive it but there is no output to the motor.
Do you have any suggestions on what could have caused the drive to fail, is there possibly something else I am missing here that would allow one drive to operate fine but an identical one to fail? Ordinarily I would expect it just to be damaged by a current spike but I would have expected both drives to fail.