Driving electromagnet coil with H-bridge

Discussion in 'General Electronics Chat' started by websonic, Apr 28, 2017.

  1. websonic

    Thread Starter New Member

    Nov 4, 2016
    6
    0
    Hi everybody,

    I am breaking my head around subject how to make electromagnet coil much stronger and reversible in same time.
    It would ideally run on 230 Volts DC.
    Why? well just one simple full-bridge rectifier and you are good to go.
    My problem is that I can not find schematic for H-bridge driver which runs on such high voltage.
    I already do have code for arduino which can drive it.
    Attached schematic is just conceptual idea and nothing more.
    Please help :)
    H-bridge oscilator.jpg
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    16,200
    4,750
    Plenty of Mosfet H bridge that work on this voltage, and higher.
    Max.
     
  3. websonic

    Thread Starter New Member

    Nov 4, 2016
    6
    0
    Can you post some links please? I could not find them my self.
     
  4. cmartinez

    AAC Fanatic!

    Jan 17, 2007
    5,512
    6,486
    Check this thread, it's an H-bridge circuit designed for 90VDC motors, but it should work as well for what you want.
     
  5. MaxHeadRoom

    Expert

    Jul 18, 2013
    16,200
    4,750
  6. websonic

    Thread Starter New Member

    Nov 4, 2016
    6
    0
    Thanks for such quick response guys.

    I am afraid that classic approach is not good idea ( like motor driver)

    Transistors, mosfets or IGBT*s are to be used as simple on-of switches which would short big capacitors and with that achieve single but strong electromagnetic impulse in a coli.
    So i do not need pwm for opening them since it must be instantly opened and closed.
    My main concern is blow back from electromagnetic coil after switching of.
    Speed would not be greater from 50 hz per second (might be not bigger from 30 hz).

    Any suggestions?
     
    Last edited: Apr 28, 2017
  7. dl324

    AAC Fanatic!

    Mar 30, 2015
    7,222
    1,674
    Both circuits included snubbers.
    A nit, but Hz is cycles per second. Not sure what cycles per second per second would be...
     
  8. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
    7,586
    1,250
    Blow back, you mean Back Emf! then i suggest if your going to use 230VDC from the mains, then you need high voltage transistors like BU508D and i would use optocouplers like 4N35 to isolate it from your microcontroller.
     
  9. websonic

    Thread Starter New Member

    Nov 4, 2016
    6
    0

    This sound good.
    It is interesting that I could not find it with google search.

    Thanks
     
  10. websonic

    Thread Starter New Member

    Nov 4, 2016
    6
    0
    Its just my bad English.
    This electromagnetic resonator should not work on more than 50hz.
     
  11. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    8,747
    2,019
    What is your mains voltage? 230V RMS AC mains would give you about 323V DC on the capacitor bank.
     
    shortbus likes this.
  12. websonic

    Thread Starter New Member

    Nov 4, 2016
    6
    0
    We have here 230 V (usually) 50Hz
     
Loading...