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Yes, this DC motor setup runs on AC current as well. I expect an AC motor which is variable has many differences than one which is a single speed. Brother-in -law will know. I shall ask!

Well-said, Pups! :nj

Well, DC motors and controls like this are quite expensive I am certain. To save money and get it done simply, an interchangable pulley setup to change speeds and a regular,common AC motor would be...

AFAIK Taking AC and converting to variable DC current allows for use of a DC motor which can be run at a desired speed versus an AC motor which relys on internals to determine speed. That! Here is...

And there you have it! Controller for a DC motor!

Would not the OP's controller be for a DC motor? Reason I ask is I have a setup I hope to use with a controller and a DC motor salvaged from some old printing equipment. Plugs into 110 AC, but has a...