I've never messed with one of those setups, but if the controller can be disassembled enough (without breaking stuff getting into it) for access to the internals I'd probably try to fix it rather than replace it.
Do you know whether it uses a BLDC (brushless) motor type? If so, its probably a hall-effect sensor input from motor to the controller. I'd start there, making sure the input signals are being produced. Then determine the type of variable output control, whether its PWM or other... unless it has proprietary components or its totally fried something major it might be repairable. It could be something as simple as an internal fuse that isn't documented as well.
I promised to go look at a dead conveyor for a nearby neighbor later on this week... according to the business owner it runs on 3-phase AC input power (pretty bizarre in America!) which standard 115 volts AC supply runs through a single phase-to-3-phase converter, then powers some unknown type of variable speed control for the conveyor. The guy paid big bucks to someone who can't figure it out of course... now two days ago he rode up my driveway on his ATV... been two years since I last seen him... an' fixed his electronically controlled baler for him. This is the kinda weird crap I get into... so if you can't find any other option, feel free to ship the bugger to 'da UP 'an we'll see what shakes out!
Do you know whether it uses a BLDC (brushless) motor type? If so, its probably a hall-effect sensor input from motor to the controller. I'd start there, making sure the input signals are being produced. Then determine the type of variable output control, whether its PWM or other... unless it has proprietary components or its totally fried something major it might be repairable. It could be something as simple as an internal fuse that isn't documented as well.
I promised to go look at a dead conveyor for a nearby neighbor later on this week... according to the business owner it runs on 3-phase AC input power (pretty bizarre in America!) which standard 115 volts AC supply runs through a single phase-to-3-phase converter, then powers some unknown type of variable speed control for the conveyor. The guy paid big bucks to someone who can't figure it out of course... now two days ago he rode up my driveway on his ATV... been two years since I last seen him... an' fixed his electronically controlled baler for him. This is the kinda weird crap I get into... so if you can't find any other option, feel free to ship the bugger to 'da UP 'an we'll see what shakes out!