Connect with us

DC motor Speed Control with high current and potentiometer

Discussion in 'Sensors and Actuators' started by Stefanus Adrian, Nov 25, 2016.

Scroll to continue with content
  1. Stefanus Adrian

    Stefanus Adrian

    2
    0
    Nov 25, 2016
    Hello

    I need to make a circuit that can control the speed of DC motor, i'm basically a newbie at electronic so the only method i can think of is using a potentiometer, but because of a high power needed for the dc motor, it also needs a high current, and i dont really understand how to make a circuit that can control the speed at high current, so will you be kind enough to help me with this?

    Thank you
     
    Last edited by a moderator: Nov 25, 2016
  2. Minder

    Minder

    2,966
    626
    Apr 24, 2015
  3. 73's de Edd

    73's de Edd

    2,880
    1,218
    Aug 21, 2015
    The MAGIC numbers not being given, are the maximum voltage involved and the maximum current.
    Without that info we cant ascertain if this is going to be a simple $20 build or will its complex power demands need $12,000.
     
    Last edited: Nov 25, 2016
  4. Stefanus Adrian

    Stefanus Adrian

    2
    0
    Nov 25, 2016
    Sorry for not mentioning it, its 12 Volts and 10 Amps, thanks
     
  5. davenn

    davenn Moderator

    13,596
    1,875
    Sep 5, 2009
    OK as minder suggested, you are going to need a PWM controller also known as an H-bridge, plenty of them on eBay

    you wont find pots that can handle 10 amps. The very few and very expensive pots that exist can handle an amp or 2 at most
     
  6. 73's de Edd

    73's de Edd

    2,880
    1,218
    Aug 21, 2015
    Sir Stefanus Adrian . . . .

    Having built my own constructions for going on 75 years now and my MASSIVE accumulation is such that I would already have all parts .
    BUT the aspect of design, board layout and final construction and then any de bugging . . . . . and then seeing that something like this being offered . . .this below would win out every time.

    Here are multiple examples . . . from a basic boarded unit, on up through cased models.

    ALWAYS overdesigning . . . . this is meeting 5 times your voltage and twice the current demands . . . for meeting any surprises as well as less component stressing.

    Now . . . . . for your consideration:

    http://www.ebay.com/itm/DC10-60V-PW...tch-20A-New-/331781985152?hash=item4d3fbf5380

    http://www.ebay.com/itm/9-60V-Max-2...ariable-Speed-Controller-Switch-/302014786519

    http://www.ebay.com/itm/9-60V-Max-2...ariable-Speed-Controller-Switch-/302014784443

    http://www.ebay.com/itm/New-Max-20A...d-Switch-Controller-12V-24V-60V-/121975204863


    There are several copycats of these, so just pick a sourcing in / near Singapore / Indonesia .


    73s de Edd
     
    Last edited by a moderator: Nov 26, 2016
  7. Minder

    Minder

    2,966
    626
    Apr 24, 2015
    If you are interested in building one for the experience then something like the one on the Dave Johnson site can be made to work, this is how the majority of ebay versions are made.
    You can wire a prototype up using something called Vero or strip board which subs for a printed circuit.
    M.
     
  8. BobK

    BobK

    7,682
    1,686
    Jan 5, 2010
    An H-bridge is not the same thing as a PWM controller. A PWM controller merely turns the motor on and off at some frequency and duty cycle. It can be combined with and H bridge which allows you to reverse directions, but if you want to run in only one direction an H bridge is not necessary.

    Bob
     
  9. tedstruk

    tedstruk

    475
    7
    Jan 7, 2012
    not a potentiometer... What you are looking for is "A Rheostat"
     
  10. davenn

    davenn Moderator

    13,596
    1,875
    Sep 5, 2009
    basically the same thing
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-