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Controlling Drill Motor Speed - Universal Motor

Discussion in 'Sensors and Actuators' started by ScottRD, Jul 24, 2014.

  1. ScottRD


    Jul 24, 2014
    I've found various useful articles here, so it was time to become a member, so thanks in advance for any help!

    I'm currently working on a project to use a standard drill as a mixer. I want to mount the drill to a mixer stand, but I would like to be able to control the speed with a knob vs holding the trigger halfway for 10 minutes at a time.

    My understanding is that drills typically use a brushed type universal motor that accepts AC or DC, so my question would be how do I control the speed?

    I believe they use use pulse width modulators or triacs for a lot of these triggers, but would it be possible to just use a DC drive like a minerak or KB to control it, set at 90v dc? or is there a better alternative keeping the power AC using another triac or PWM

    Note its a 110v drill, the attached picture is the trigger I pulled out of it


    Attached Files:

  2. BobK


    Jan 5, 2010
    A standard dimmer switch would probably work okay.

  3. debe


    Oct 15, 2011
    These SCR speed controller modules are quite cheep on Ebay & work on universal drill motors. And will work on 110V or 240V AC.

    Attached Files:

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