I'm doing a project on DC motor speed control, I'm doing it because it's the closest thing to instrumentation and control out of all the projects I have to choose from. I'm having trouble seeing any applications for it, other than for robotics. We did have a motor generator set at a plant I was at, can anybody give some examples where this may be used in the process, nuclear industry.
Plastic (PVC) extrusion lines have to run at various speeds.
Bill
-- Fermez le Bush
We use Dc motors, 6 600 HP motors in our aluminum rolling mill.
2 300 HP on unwinder and rewinder. They are controlled by SCR drives.
Overhead cranes, lifts (sorry elevators, but not so common now), tramways, railway traction units, etc, etc.
Battery powered tools. Mobility scooters. Or did you mean industry specific uses?
Ed
That's good, I guess it won't be a waste of time designing a speed controller. I researched an application where they used a variable speed motor to control pressure instead of a discharge valve. It appears to be not a common practice, however it would save the plant some money on the power bill.
DC motors are commonly used for stirrers and agitators in process tanks. The fact that speed is a linear function of voltage makes them relatively easy to control.
Realize, however, that because of semiconductor electronics, it is now possible to use ac drives that adjust frequency and voltage to drive ac motors, including induction motors, at variable speed.
Bill
-- Fermez le Bush
We have those to in our mill. But they are on smaller A.C. motors, 50 HP and less..
PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.