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Thread: dc motor controller for 800w 12v dc motor

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  1. #1

    Default dc motor controller for 800w 12v dc motor

    hi guys,

    i need a speed controller for an 800w 12 v dc motor, it is basically a starter motor lucas-tvs m35g, it is required 2 function in one direction only, a cut off using 2 limit switches will be required. I need someone with experience to help me out as i dont have the time to experiment with it myself due to the rest of my project work lying pending,
    pls let me know if anyone can provide me with the same with costing.

    thnx.

  2. #2
    Senior Member T-1000
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    800W at 12V means dealing with currents upwards of 60A. This is huge... All components are going to be super-expensive, even the connecting wires. To heat sink the controller, you'll need to mount it on top of an ice block. I don't think it is trivial.

    Get yourself a lower rated motor. Something below 100W @ 12V.
    --
    Mohit Mahajan,
    www.BioZen.co.in

  3. #3

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    Hai dvation

    I can do that.

    I may be late, but i do have experience in controlling such motors.

    The last one I did was 110V/5A rating motor.

    If you are interested contact me

    Regards
    Nandhu

  4. #4

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    Hi,

    I can develop a controller as per the requirement. If required contact me blchand@hotmail.com. I am from Bangalore.

  5. #5
    Super Moderator T-1000 docel's Avatar
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    Now.....why does anyone need a starter Motor????
    That thing is a 'bomb' if not careful.
    What Mohit said is true, even if an understatement, so heed his words.
    The 800w is just the coasting power. The start-up current is about 200 to 400A from static inertia.
    Have you seen the armature coil? There is no wire!!

    It is usual for people to post single line requirements and then bring out strange and weird needs after 10 replies. It will save a lot of peoples time and energy , if you state the actual problem, with relevant details.

    Nandhu: your 110/5A motor is nothing compared to the starter motor.

    There is NO way you can make a speed controller for that
    kind of motor. It is NOT designed for it!!

    So, please dont accept what you cant deliver. The OP will rely on you to implement and might get into serious trouble if you can't.
    docel
    ^Anything is possible..
    after YOU prove it!!

    http://bangalorerobotics.tripod.com

  6. #6
    Senior Member T-1000
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    Nandhu:
    The last one I did was 110V/5A rating motor.
    5A and 60A don't even compare!!!
    Heating power/losses >
    = i x i x R
    = 3600 x R Watts
    Even if you have a super-duper resistance over the whole circuit of 0.1 ohm, you'll still need to dissipate 360 watts of heat somewhere. So you'll need to mount the whole setup somewhere up in the Himalayas where it snows always. :-)

    Chand:
    I can develop a controller as per the requirement.
    We would all love to hear about that, if its not a big trade secret. How would you do that?!
    --
    Mohit Mahajan,
    www.BioZen.co.in

  7. #7
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    hello good

  8. #8
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    A and 60A don't even compare!!!
    Heating power/losses >
    = i x i x R

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