A few years ago I picked up a surplus Universal motor and controller, the controller was built around the TDA1085 IC, originally meant to control washing machine motors.
The motor had a very simple (crude) pulse wheel feedback, I was very impressed with the performance, especially low speed for band saw use.
It also has current limit built in etc.
It can be used with a Triac to control the motor with AC or fire into a bridge and use the motor in the DC fashion.
Mine was designed in latter style, In DC mode.
Once designed, it could be much cheaper to produce, maybe.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.