This may seem like a dumb question, but does anyone have a schematic for a BDCM controller. All I seem to be able to find are partial schematics or schematics that include a micro controller. My customer has specifically requested no micro controllers. The customer is also governed by the FAA and for them to be able to use the controller they are required to show manufacture capabilities. I'd hate to reinvent the wheel if someone already has something.
Their requirements are pretty simple as far as I can tell and are as follows:
They will be driving a 3 phase brushless DC motor pulling a continuous duty of 8 amps, 10 starting amps. They want to be able to push 20-35 Volts DC in to the control circuit and send the same out to the motor. The motor is required to run at 900 RPMs and be reversible.
The current method of running the motor is through a control box that simply has a 24 Volt brushed motor that turns a three leg rotary switch at a constant speed. Because the control box was manufactured in the 1930s for the USAF it's nearly impossible to find parts for it.
All help is greatly appreciated, and if any information is needed on the current control box, or step motor just let me know. Thanks in advanced.
EDIT: Information on current controller.