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DC motor speed control

Discussion in 'Electronic Basics' started by [email protected], Aug 26, 2008.

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  1. Guest

    hi

    This is muralidhar.i am planing to create an electrical bike for that
    i am planing to use a dc motor
    (12V) but i don't no how to control the speed of that motor since it
    is a DC supply i cant use transformers. I have little knowledge about
    DC supply because i am electrical engineer EEE
    now i am in IT field so i don't have clear idea.


    can any one help me what are the simple way to vary DC voltage with
    some digram which can be made in home .(the thing is i should handle 4
    to 6A current)
    or
    any other solution to control the speed of that motor

    please send me mail on below address

    id:
     
  2. Phil Allison

    Phil Allison Guest

    <

    ** Give this man a prize for his honesty.

    In the words of America's most famous living philosopher:

    " A man's gotta know his limitations ... "




    ..... Phil
     
  3. Tom Biasi

    Tom Biasi Guest

    What Phil is saying to you is that this is not a beginner project.
    You will be controlling some heavy current and the cost will not be cheap.
    One suggestion would be to bank your batteries and tap different voltages.
    You will lose torque at reduced voltage but it can work.
    May I suggest a different approach?
    Get a geared motor and turn your pedal sprocket at your normal pedal pace
    and use the bikes gears.
    Good Luck,
    Tom
     
  4. Guest

    Please do tell me - who is America's most famous living philosopher
    who can be credited with saying that first? Tim Allen?
     
  5. Phil Allison

    Phil Allison Guest


    Please do tell me - who is America's most famous living philosopher
    who can be credited with saying that first? Tim Allen?

    ** Hardly.

    The comment is from a famous movie released in 1973.

    Allen was still in school or jail back then.




    ...... Phil
     
  6. neon

    neon

    1,325
    0
    Oct 21, 2006
    MAXIM makes the most unique efficient motor controllers chips. you must go to datasheetlocator.com and find them. I will not. try spargfun.com they might have in stock what you want.
     
  7. Tom Biasi

    Tom Biasi Guest

    One of my favorites Phil. The cable company is running his movies all this
    week. G,B& U yesterday, Fistfull of Dollars today.

    Tom
     
  8. bw

    bw Guest

    G, B and U is one of the all-time greats.
    Simple story, nice cinematography, nice sound, good characters and Eli
    Wallach. Very few flaws, such as the commander of the union force in the
    battle scene.
    I've seen it countless times and it's always a fun time.
     
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