Thread: Variable speed control.

That can be used depending on it's specs. What is it's input? What is the output? What is it's nominal load/hp rating? What little I know, I know that there are a lot of variables and you need to talk to a person who is skilled in that trade. A normal electrician may not know, may take someone working in an mfg environment as a line electrician to answer your questions.

If you ever "let the smoke out" of electrical stuff, you can't ever get it back and it's toast. If you figure out how to put the smoke back into electrical oop's, please patent it and you will become an overnight billionaire!

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 box with a rheostat and other electronics and is quite variable by turning a dial inside the box.

Originally Posted by sharptonn

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 box with a rheostat and other electronics and is quite variable by turning a dial inside the box.

Just guessing can "let the smoke out" & be dangerous. Mine has a rheostat and is 220v single phase in, 220v 3 phase out:


I can wire a house any day, but that stuff you have to be specific about. You can have 110v in w/ dc out, 220v single phase in w/ dc out, and of course like mine. Other variables are what size motor the controller can handle...mine will handle a 3 hp motor and I have a 2 hp motor on it. Nothing gets much past warm to the hand after running at 25% of 100% (severe load) for several hours with my set-up.

I will send a picture of the back of the unit that details input and output in a few. My sister has tons of metal and I have a nephew who can and has a welder so putting together a 2 by 72 grinder is possible so we will see . pics to come .

so here is the unit's label. Will it work ? What motor will it work with ? with the motor loose power as speed is decreased with this motor ? Since I know nada about such things , any help is awesome .

This product is by "leeson" and I will call them directly, maybe they can tell me what electric motor to use with it and if it will loose power while lessoning the speed ? IF so , maybe, just maybe it will work. also, I found a pdf manual for this item .

Hey, more info . here are the specs . NOTE: Heat sink is required on this model for the following applications
3/4 and 1 HP 90 Volts
All 1.5 and 2 HP

Catalog Number: 174307.00
Description: DC SCR CONTROL - NEMA1 ENCLOSED
Input Voltage: 115/230VAC
Output Voltage: 90/180VDC
Output Current: 10 Amps
HP Range: 90V (1/8-1) / 180V (1/4-2)
Direction: NON Reversing
Enclosure: NEMA 1
Ship Weight: 6 lbs.

and here are the features .
LEESON Speedmaster DC control is a general purpose drive designed for use with permanent magnet type direct current motors. NEMA 1 enclosed drives are suitable for most industrial applications. Most controls have a dual voltage switch allowing the control to be used on 115 or 230 volt, single phase, 50/60 Hertz service. However, the proper voltage motor should be selected for use with the power supply input, i.e., 90 volt DC motors for 115 volt input or 180 volt motors for 230 volt input service. Installation and adjustment instructions are included.

thoughts ?

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

and what do I have . you said And there you have it! Controller for a DC motor! I am not sure what that means. pardon my ignorance .

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 my setup.