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    d1315401's Avatar
    d1315401 Posts: 3, Reputation: 1
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    #1

    Oct 7, 2008, 03:27 AM
    110vac to 110vdc conversion
    I have 110vdc motor off exercise treadmill ; want to make grinder; how to convert acv110 to dcv 110 to use motor. Will diodes from car alternator be strong enough?
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #2

    Oct 7, 2008, 02:35 PM

    Are you absolutely positive that the motor is a DC motor right now, how were you getting power to it as a tread mill?
    d1315401's Avatar
    d1315401 Posts: 3, Reputation: 1
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    #3

    Oct 8, 2008, 04:55 AM
    The 110vdc motor came put of a treadmill tore apart for scrap,(junked) at st. vince depaul store where I volunteer. People donate things that don't work, and is dismantled for recycling.I have the 110vdc motor which has the nameplate on it. How can I use 110vdc motors on 110vac house power?
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #4

    Oct 8, 2008, 09:10 AM

    You might try googling stuff on inverters but I think they would cost more than just buying a new ac motor.
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #5

    Oct 8, 2008, 09:33 AM
    They are usually used with motor controllers which may use pulse-width-midulation to vary the speed and keep the torque nearly constant.

    Assuming a 2 HP motor
    I = 746 *2 / 120

    I'd use a 30 Amp rectifiers with a 600 V Peak inverse voltage rating.

    See Full wave bridge - resistive load here: http://www.hammondmfg.com/pdf/5c007.pdf

    Bridge rectifiers have to be heat sinked and have markings for ~,~,+ and -. You also need to use grease.

    You can try to find this stuff on the surplus market or

    US - Electronic Components Distributor | Newark.com and/or Digi-Key Corporation - USA Home Page or www.mouser.com
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