need help for h bridge.

Discussion in 'Homework Help' started by ect_09, Mar 22, 2013.

  1. ect_09

    Thread Starter Member

    May 6, 2012
    180
    1
    Hi...,
    i want to ask that can i made H bridge using 75n75..??
    if possible then kindly give circuit,...
    Thanks...!!
     
  2. shortbus

    AAC Fanatic!

    Sep 30, 2009
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    Yes they would work, depending on the voltage and amperage you need. But do yourself a favor and use driver ICs to switch them with.

    Since this is YOUR homework, show what you have so far. As a schematic.
     
  3. ect_09

    Thread Starter Member

    May 6, 2012
    180
    1
    my requirements ,voltage is 24v nd 1.5A....

    i google it..but not get good result .
     
  4. shortbus

    AAC Fanatic!

    Sep 30, 2009
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    Funny Google gives 1,730,000 results for "mosfet h bridge". We will help, but not do your work for you. If we do you don't learn.
     
  5. ect_09

    Thread Starter Member

    May 6, 2012
    180
    1
    yes you are right right sir...
    for me the problem is that i have only 4 75n75 mosfet's ,a DC motor ..
    google find all the h bridge with different mosfet that i dont have....
    thats why i come here to get help..
     
  6. RRITESH KAKKAR

    Senior Member

    Jun 29, 2010
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    you can go with l298....
     
  7. shortbus

    AAC Fanatic!

    Sep 30, 2009
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    You will probably never find a schematic for that particular mosfet. But, by looking at the data sheet for it, it is a standard N mosfet that uses ~10V on the gate to turn on completely. The specification you are looking for is "voltage gate to source, Vgs". So any H-bridge schematic that uses around 10V -12V for the Gate voltage will work.

    Most H-bridge circuits on the web will show International Rectifier (IR)part numbers. The IR parts are arguably the most widely known and used in the world. That's not to say they are best or only ones that can be used.

    The main thing to worry about is the Vgs in the circuit, and that the mosfet you choose is able to handle the voltage and amperage needed. Always use the mosfets as a switch, by that I mean fully turned on. That is done by using Vgs shown on the first page of the data sheet.

    Hope this helps you.
     
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  8. ect_09

    Thread Starter Member

    May 6, 2012
    180
    1
    but micro controller gives 5v in output,then how its possible that h-bridge will run with 5V.
     
  9. WBahn

    Moderator

    Mar 31, 2012
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    I seem to recall someone in about, oh, post #2 saying something about doing yourself a favor. Hint: Do yourself a favor.
     
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  10. ect_09

    Thread Starter Member

    May 6, 2012
    180
    1
    can you tell me which driver ICs is good to use with it...
     
  11. WBahn

    Moderator

    Mar 31, 2012
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    4,805
    Can you Google?
     
  12. ect_09

    Thread Starter Member

    May 6, 2012
    180
    1
    i find L293d
    can i use it..????
     
  13. praondevou

    AAC Fanatic!

    Jul 9, 2011
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    I predict this thread won't go anywhere.

    Is this just a ON/OFF circuit with reversing capabilty or is it PWM? If it's PWM what's the frequency?

    "my requirements ,voltage is 24v nd 1.5A"
    Is that the motor specification? What's the maximum motor load? Do you have a motor spec sheet?


    In your application, does the motor occasionally work in generator mode (driven by the load)?
     
  14. ect_09

    Thread Starter Member

    May 6, 2012
    180
    1
    yes this is motor spec's. it is gear motor .
    load is a about 5 to 6 kg.

    it has to drive load ,
    in simple words motor will move the load from 1 place to another .
    you can say that i am making little over head crane.
     
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