Lewispaul at 23:55, 7 January 2016

2016-01-07T23:55:42Z

Lewispaul: Created page with " COFF -- looks like the capacitance across the relay contacts. LCOIL -- the inductance of the relay coil. RCOIL -- the DC resistance of the relay coil. ROFF -- the resistan..."

2016-01-07T23:55:02Z

Created page with " COFF -- looks like the capacitance across the relay contacts. LCOIL -- the inductance of the relay coil. RCOIL -- the DC resistance of the relay coil. ROFF -- the resistan..."

New page

COFF -- looks like the capacitance across the relay contacts.

LCOIL -- the inductance of the relay coil.

RCOIL -- the DC resistance of the relay coil.

ROFF -- the resistance across open relay contacts. Not infinite because
that's how it goes in circuit simulation. (Infinity might cause
mathematical problems.) Use a very large resistance that is big enough for
your application, but not too large. It looks like this file uses 1 gigohm
or 1 teraohm.

RON -- the resistance through closed relay contacts. Not zero for the same
reason as above. Don't make it unreasonably small. Huge differences
between Ron and Roff may sometimes cause simulation problems.

INOM -- nominal coil current. Inom is calculated, not user-specified, so
leave it alone.

VNOM -- nominal coil voltage (e.g., 5V for a relay with a 5V coil)

VON -- seems to be a percentage; maybe it is the fraction of nominal
voltage that actually activates the relay.
VOFF -- seems to be a percentage; maybe it is the fraction of nominal
voltage that would let the relay release.

VH -- half the difference between Von and Voff, so it represents something
akin to "hysteresis" about the nominal trip point. Again, it seems to be a
unit-less percentage, not an actual voltage in volts. It is calculated, so
you shouldn't set it unless you need to override.

TON -- probably a time-constant, my guess is it is how long the relay takes
to close when power is applied to the coil.

.PARAM INOM=VNOM/RCOIL
.PARAM VT=(VON+VOFF)/2
.PARAM VH=(VON-VOFF)/2

@@ Line 35: / Line 35: @@
-.PARAM INOM=VNOM/RCOIL
+.PARAM INOM=VNOM/RCOIL <br>
-.PARAM VT=(VON+VOFF)/2
+.PARAM VT=(VON+VOFF)/2 <br>
 .PARAM VH=(VON-VOFF)/2

Relay.lib in LTspice - Explanation of Paramaters - Revision history

Lewispaul at 23:55, 7 January 2016

Lewispaul: Created page with " COFF -- looks like the capacitance across the relay contacts. LCOIL -- the inductance of the relay coil. RCOIL -- the DC resistance of the relay coil. ROFF -- the resistan..."