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H-Bridge PWM signal to Papst 4412 FGMPR Vent doesent spin Backward at 60% PWM ??

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  • N
    NoobCheck1
    last edited by Aug 12, 2024, 8:21 PM

    I´m new here, hello.
    Can someone help me out how to use a H-Bridge to correct regulate the 0-40% and 60-100 % PWM Signal.
    This Vent has the special Possiblility to Spin in both Directions, vorward and Backward with the correct PWM Signal.
    Here is the Sheet to it:
    https://docs.rs-online.com/d48e/A700000006464999.pdf
    It sounds easy to just use 40% or 60% PWM Rate to get the Result.
    But sadly, it doesent do what i want it to do.
    I ended up now with sending the PWM signal, vs. not Pluging the PWM Signal at all.
    This lets the Fan spin in the Opposit direction.
    It´s confusing, i cannot understand what the Problem here is but it works now how i wanted it.

    But what do i wrong ? Is it the wiring or the Setting, or the wrong Module ?
    I need a PWM Module that can work in on a i2c A Hub, for the Possibility to regulate 4 Fans seperate with Individual settings.
    Any recommendations for this task, what i can use for it ?

    T 1 Reply Last reply Aug 12, 2024, 8:39 PM Reply Quote 0
    • T
      teastain @NoobCheck1
      last edited by Aug 12, 2024, 8:39 PM

      @NoobCheck1 Connect the power and grounds to a sufficient power supply. No H bridge needed!
      You fan works like a M5Stack 360 deg (Continuous) RC hobby servo.
      Here is code.
      https://github.com/m5stack/M5-ProductExampleCodes/tree/master/Accessory/ServoKit180_360/Arduino/ServoKit180_360
      I have not tried it but I have done 360 servos...and this is the M5Stack 360 example.
      And a PbHub should work.

      Cheers, Terry!

      100% M5Stack addict with several drawers full of product!

      N 1 Reply Last reply Aug 23, 2024, 7:06 AM Reply Quote 0
      • N
        NoobCheck1 @teastain
        last edited by Aug 23, 2024, 7:06 AM

        @teastain Hi teastain, thank you for your reply with this Informations. Sadly i thougt i need this H bridges, and bought them all. So now i use them with the possibility up to 10000 frequency. One Set of Vents would need 25000 frequency, but they work also with 10000. The others only need 2000-4000 frequency, and happy with the value it can deliver. And i have no idea how to use 5 set of Fan´s with the onboard PWM and different Values.
        The Hub-B can deliver PWM, but i cannot choose the frequency, so i not try to use this device, because lower frequencys at 2000-5000 with the 25000 frequency Fans produce very noisy Fan Sounds. But at 10000 it is ok to hear.

        On the End, i´m happy the Fans i have can be used with the M5stack H Bridge Units.

        The next i need to do is, how to use Servos, to Automatically set the height of the Lamp.
        But how i can Stop and Hold a Servo, also without a Power Source to hold the weight ?
        Are there some M5stack Units and Servos i can use with a weight of 2-3kg ?
        They should lift and securely stop lifting in a Range of 1 Meter.
        I looked up some RC Winds and a Servo Unit, but the Most of them have no rachet stopper, and for now i have no idea what devices i can use easily for this task.

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