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I'm trying to model a 12V 500 mA pilot assisted solenoid valve in NI Multisim, but it doesn't have any solenoid components that I see. I thought I could just model it with an inductor or relay, but I don't know what component to use or what values to give it. It doesn't need to be exact, just something vaguely approximating the electrical characteristics of a solenoid.

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  • \$\begingroup\$ You can probably model it as an inductor. Take a look at the data sheet for the coil characteristics. \$\endgroup\$ May 19 '14 at 23:06
  • \$\begingroup\$ I'm using a 100uH inductor right now, but the datasheet is ... less than informative. ebay.com/itm/… \$\endgroup\$
    – Daniel B.
    May 19 '14 at 23:25
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If you aren't doing anything super-fancy, you can probably safely assume that a 12V 500mA solenoid has an impedance of 12v / 500mA = 24 Ohms.

If it's going to be switched relatively slowly (1/sec is pretty slow), you can assume a 24 Ohm resistor and just remember to put a backwards-facing diode in parallel with the coil to protect your circuitry from the collapsing magnetic field's current when you get ready to build it.

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  • \$\begingroup\$ The diode's already in place :) \$\endgroup\$
    – Daniel B.
    May 24 '14 at 21:36

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