Guys, I'm ready to throw in the towel. At one point,m I figured I could just replace all the components, but this thing is so gunked up with potting compound, that is no small feat and with some of the parts becoming hard to find, it is getting risky.
This is just a brushless DC blower fan. The fan assembly is fine and the stator and rotor and windings all seem fine. The controller is what is bad, but I can't seem to fix it and the manufacturer won't repair it, sell me a controller or assist with my own repair. They think I might steal their IP. Ha, if only they read this thread, they'd realize how unlikely that would be!
The controller has all kinds of inrush and thermal protection to keep it from burning up. What about making a new simplified controller and tossing this one. Heck, it doesn't even need to be housed within the same box. It would take AC input and rectify that to DC then use hall sensors to control a cumutator IC to time the firing of each phase. How hard could this really be?
This is just a brushless DC blower fan. The fan assembly is fine and the stator and rotor and windings all seem fine. The controller is what is bad, but I can't seem to fix it and the manufacturer won't repair it, sell me a controller or assist with my own repair. They think I might steal their IP. Ha, if only they read this thread, they'd realize how unlikely that would be!
The controller has all kinds of inrush and thermal protection to keep it from burning up. What about making a new simplified controller and tossing this one. Heck, it doesn't even need to be housed within the same box. It would take AC input and rectify that to DC then use hall sensors to control a cumutator IC to time the firing of each phase. How hard could this really be?