High amp pwm controller

Discussion in 'The Projects Forum' started by daux, Jan 7, 2014.

  1. daux

    Thread Starter New Member

    Jan 7, 2014
    I am planning to build some H bridges with relays to control 4 car window motors. I think that they need around 20 amps each motor. Right now i dont have any idea to how to build the circuit so it can be PWM controlled by an arduino. Any ideas?

    Edit. I forgot to mention that i dont want to buy already builded parts.
  2. shteii01

    AAC Fanatic!

    Feb 19, 2010
    The controller does not provide the amps, it provides the control signal.

    The drivers, that drive the motor, provide the amps.
  3. MaxHeadRoom


    Jul 18, 2013
    Unless you are doing it for the exercise why not look at picking up a couple of drives from the auto wrecker, I believe they are PWM, but they are fed from the Canbus network usually and come with electronic breaker/ O/L, but may be possible to reverse engineer to interface to Arduino?
    There are many circuits out there for PWM controlled DC brushed motors
  4. SgtWookie


    Jul 17, 2007
    The VNH2SP30-E by ST Microelectronics is just the ticket for what you're wanting:

    Mouser stocks them:

    Unless you're really determined to make your own board, you could just get one of these:

    If your goals are to save time and money and have a reliable driver when done, then definitely go with the finished board.

    If you're determined to build your PWM bridges from discrete components, you're likely going to spend a good bit more money, a LOT more time, and have a number of smokey deaths of boards, then go ahead and build one yourself. I suggest very strongly that you read through ALL of the documentation on those VNH series of controllers, as you may want many of those features to be in your finished project.