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high speed solenoid switching

Discussion in 'General Electronics Discussion' started by Glock, Apr 25, 2011.

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  1. Glock

    Glock

    3
    0
    Apr 25, 2011
    hey guys im new to this site and not really an electronics fundi but would really appreciate your help in this regard.

    i need to build an electronic circuit which can switch a solenoid pump on and off repeatedly really fast to create the pumping force required.The solenoid operates on 12-14 volts dc and requires 11 amps operational current.In case you guys are wondering what im using it for,its for an aquamist pump on my car as i cannot get a replacement circuit board for it which was damaged by corrosion.Nobody around even has an idea how to build a replacement circuit.

    thanks guys
     
  2. Resqueline

    Resqueline

    2,848
    2
    Jul 31, 2009
    I'd figure it works like the electronic plunger fuel pumps. It's a very simple 1-transistor circuit but relies on a second coil in the solenoid for feedback/oscillation.
    A driver without this would require employing a fixed-frequency (although tunable) with tunable on & off times (duty cycle).
    A couple of 555's and a power transistor might do the job.
     
  3. Glock

    Glock

    3
    0
    Apr 25, 2011
    hey resqueline thanks for the advise but do you think you could come up with a circuit diagram with component values.My knowledge in electronics is somewhat limited but if i have the circuit diagram then the rest is pretty much simple.Im a high voltage technician so i have just the basic understanding for electronics.

    if you can come up with a circuit diagram and require my e-mail address then ill be glad to give it to you.Thanks once again
     
  4. Resqueline

    Resqueline

    2,848
    2
    Jul 31, 2009
    Circuit #17 here shows one way of making PWM independent of frequency.
    The attached picture shows another, simpler way. Use a BUZ11 or an IRFZ44 to drive the solenoid (connected between + & midpoint).
     

    Attached Files:

  5. Glock

    Glock

    3
    0
    Apr 25, 2011
    THANKS RESQUELINE....

    IM GOING TO WORK ON THIS AND IF IM HAVING ANY PROBLEMS IM GOING TO GET BACK TO YOU..

    TAKE CARE
     
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