(Topic ID: 271896)

Solenoid/coil Back-EMF diodes explained

By G-P-E

1 year ago



Topic Stats

  • 5 posts
  • 3 Pinsiders participating
  • Latest reply 1 year ago by bepositive
  • Topic is favorited by 5 Pinsiders

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    #1 1 year ago

    Here is a great layman's explanation for back emf diodes (the diodes directly mounted to most solenoids).

    The video is covering a DC motor but it basically operates on the same principle. As far as the circuit is concerned, it doesn't know or care what the actual inductor is - either motor, relay or solenoid.

    Note what happens to the controlling transistor's input voltage at 1:40 when there is no back-emf diode installed.
    And - at 4:00 --> this may be what is happening to the 48V and cooking the new stern node boards.

    #2 1 year ago

    Link to your inductor and transistor tutorials please . Thanks for taking time to create the content .

    Enjoy the day Shane

    #3 1 year ago

    Excellent video, makes me want to get a scope even more now.

    #4 1 year ago
    Quoted from bepositive:

    Link to your inductor and transistor tutorials please . Thanks for taking time to create the content .
    Enjoy the day Shane

    I wish I created this video but I should have noted that this video was made by somebody else.
    To give full credit to the creator -- this was made by a person with the ID "Afrotechmods"
    https://www.youtube.com/channel/UCosnWgi3eorc1klEQ8pIgJQ

    #5 1 year ago

    Always nice to find recommended tech tutorials . Many tech turtoials done by brilliant engineers whom that were poor educators .

    Enjoy the day ! Shane

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