accurate voltage control for motor
I have an air turbine, and it's critical that the motor speed be precisely regulated.
It's very voltage-sensitive, so the fluctuations in the line voltage between 120-126 A make the motor speed too variable.
How can it be regulated?
A UPS might work. But it would have to output voltage accurate within +/- 1%. THere's a rheostat on the motor, so the UPS could just regulate up, say, so it wouldn't be necessary to have both a step-up and step-down transformer. The motor uses 1-2 A at the normal speed. It uses max 9 A, but I never use it at that speed. I don't know, if you get a voltage regulator that's rated for a certain current, and more current goes through it, if it damages the voltage regulator, or it just can't regulate the voltage right.
It also needs battery backup for when the power fails.
Can anyone point me to such a UPS?
It would be great if the input voltage could be regulated by the actual airflow. The air turbine is powering an airline respirator, the airflow is 4-5 CFM through a hose maybe 3/4" inner diameter, with garden hose fittings. If anyone can help with that I'd appreciate it.