Connect with us

dc motor drive(motor controller) using 12v 15a current

Discussion in 'Sensors and Actuators' started by suryaurza, Nov 16, 2013.

Scroll to continue with content
  1. suryaurza

    suryaurza

    5
    1
    Nov 15, 2013
    we design this circuit using 3 mosfet. this circuit gives short circuit current of 2A but we want that it gives short circuit current of about 15A.what's modification we want to do?
     

    Attached Files:

    • pr.jpg
      pr.jpg
      File size:
      90.9 KB
      Views:
      240
    Last edited by a moderator: Nov 16, 2013
  2. suryaurza9

    suryaurza9

    3
    0
    Nov 16, 2013
    12v 15a dc motor controller using pwm

    we design 12v 3a dc motor controller using pwm circuit. which work properly and give the output 3a.
    one irf 540 mosfet ,555timer , 500k pot, resistors, capacitors,4148 diodes
    after then we modify the circuit and get 12v 15a dc motor controller using pwm circuit. so we 3mosfets in parallel and one 555 timer and other components same as use above circuit


    but it does not provide short circuit current 15a
    what will we do? tell us in detail plz


    it give output current only 2a.
     

    Attached Files:

    • pr.jpg
      pr.jpg
      File size:
      90.9 KB
      Views:
      205
  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,397
    2,777
    Jan 21, 2010
    What is your power supply?

    That circuit doesn't limit short circuit current, so I'd be *VERY* careful shorting out the load.

    Also... R4 seems to be in the wrong place. The resistors should each be connected to a single gate and then connected together before connecting to the output of the 555
     
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,397
    2,777
    Jan 21, 2010
    Also, is there any reason you're posing the same question multiple times?

    It won't get you better or faster answers, but it will annoy people.

    edit: Not only multiple posts, but multiple users. Decide which one you want to use and stick to it!

    edit2: THREE posts!
     
    Last edited: Nov 16, 2013
  5. suryaurza

    suryaurza

    5
    1
    Nov 15, 2013
    we use 12v dc power supply.can you help to simplify this circuit?
     
  6. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,397
    2,777
    Jan 21, 2010
    You response tells me nothing.

    I will assume that you have some form of protection to ensure nothing fails.

    1) Fix R4

    2) Try again

    3) Tell me what happens (there is a possibility one of your mosfets is damaged)
     
  7. suryaurza

    suryaurza

    5
    1
    Nov 15, 2013
    we fix R4 but it does not provide short circuit current 15A. i think 555 timer output does not suitable for 3 mosfet can we amplify this output.
     
  8. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,397
    2,777
    Jan 21, 2010
    OK, I will assume that nothing changes.

    The next step is:

    1) short out C1

    2) try again

    3) what current do you see?

    If the current is still low measure some voltages for me. ALL of these should be with respect to the ground (-ve) supply DIRECTLY on your power supply.

    a) pin 1 of the 555
    b) pin 8 of the 555
    c) pin 3 of the 555
    d) gate of Q1
    e) gate of Q2
    f) gate of Q3
    g) source of Q1
    h) source of Q2
    i) source of Q3
    j) drain of Q1
    k) drain of Q2
    l) drain of Q3
    m) junction of D3 and D4
    n) +ve supply at power supply.

    I expect 1 current reading, or 1 current reading and 15 voltage readings. If there is a lot of heating, you may want to connect the multimeter and then turn the circuit on briefly to take each measurement.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-