What type of solenoid do I have?

Discussion in 'General Electronics Chat' started by gte, Aug 6, 2010.

  1. gte

    Thread Starter Active Member

    Sep 18, 2009
    I'm reading about brushless motors


    and I was wondering what type of motor operation my solenoid is considered? Here is a picture of it, it appears to have a spring that seats it back to its resting position. It is 2 wire DC voltage and it takes square wave input from 0 to 10v.
  2. zxsa


    Jun 11, 2010
  3. gte

    Thread Starter Active Member

    Sep 18, 2009
    Ok, I guess the most accurate term for this would be a "Hydraulic solenoid valve"

    I thought the principle was the same as a stepper motor, but I guess not.

  4. VoodooMojo

    Active Member

    Nov 28, 2009
    a practical purpose could be to attach it to a pulsed driver, duct tape a needle to the end of the valve spool, and use it for a tattoo gun.
  5. marshallf3

    Well-Known Member

    Jul 26, 2010
    Looks like some sort of solenoid operated valve and you could indeed considr solenoid as a variation of a linear motor.

    Most solenoids are simply an electromagnet which pulls a rod into the coil when voltage is applied and the spring (either part of the solenoid or part of the mechanical device the solenoid is operating) returns it to the out position when the voltage is removed.

    There are also push-pull type solenoids in which the driven element is magnetized, these can be made to draw the rod in or push it out depending on the polarity of the actuating voltage. Pretty much the same as the way a loudspeaker works.
    gte likes this.
  6. gte

    Thread Starter Active Member

    Sep 18, 2009
    Hi, thanks!

    The signal going to it is square wave, so I'm guessing it pulses the hydraulic fluid with a square wave?

  7. BillB3857

    AAC Fanatic!

    Feb 28, 2009
    It could be using PWM to provide a variable or bi-directional hydraulic flow. As an example for bi-directional usage, 50% duty cycle could center the solenoid, 75% provide more flow in one direction, and 25% more flow in the other direction.
    gte likes this.