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  1. #1
    Join Date
    Mar 2008
    Posts
    375

    where to buy a variable speed control

    hello I got this 1/3hp motor with a swicth just to turns ON and OFF, I would like to add a variable speed control , something that I can just turn a knod to go faster or slower. can someone tell me where I can buy on and also if you can post a picture off how it looks like a would appreciated, by the way it is a (single phase 1/3hp motor).
    thank you

  2. #2
    Join Date
    Mar 2004
    Posts
    1806
    Sorry, but I don't think you will be able to do that. Single phase motors are pretty much single speed depending on line frequency.

    To have variable speed, you will need to go dc or 3 phase.
    Art
    AKA Country Bubba (Older Than Dirt)

  3. #3
    Join Date
    Mar 2007
    Posts
    122
    Quote Originally Posted by cob View Post
    hello I got this 1/3hp motor with a swicth just to turns ON and OFF, I would like to add a variable speed control , something that I can just turn a knod to go faster or slower. can someone tell me where I can buy on and also if you can post a picture off how it looks like a would appreciated, by the way it is a (single phase 1/3hp motor).
    thank you
    Hi cob,

    Check out eBay for the item listed below. Surplus Center used to sell them. Some others still do.

    ebay.com/items/Electrical-Test-Equipment__W0QQ_sacatZ92074

    Al
    Attached Thumbnails Attached Thumbnails 3800669568488080_1.jpg  

  4. #4
    Join Date
    Dec 2003
    Posts
    24221
    Quote Originally Posted by Santa Fe Al View Post
    Hi cob,

    Check out eBay for the item listed below. Surplus Center used to sell them. Some others still do.

    ebay.com/items/Electrical-Test-Equipment__W0QQ_sacatZ92074

    Al
    I think you will find that is a simple Triac (dimmer) type controller, if so, it is only good for Universal motors, as found in mains powered hand tools etc.
    A single phase induction motor, especially if it has a switched start capacitor, does not take kindly to speed control.
    If the AC motor has brushes, then it is a Universal and you would be OK.
    Al.
    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.

  5. #5
    Join Date
    Mar 2008
    Posts
    375
    Quote Originally Posted by Santa Fe Al View Post
    Hi cob,

    Check out eBay for the item listed below. Surplus Center used to sell them. Some others still do.

    ebay.com/items/Electrical-Test-Equipment__W0QQ_sacatZ92074

    Al
    do you think this would work I am not to familiar with motors

  6. #6
    Join Date
    Dec 2003
    Posts
    24221
    Quote Originally Posted by cob View Post
    do you think this would work I am not to familiar with motors
    What is the information on the motor name plate, if it has one?
    Otherwise you will need to know what type of motor you have.
    Al
    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.

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