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Tapped inductors

3 years ago 1039
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Description

How to simulate a tapped inductor in EasyEDA.

For a general tapped inductor with a single N:1 tap ratio, place two inductors, L1 and L2 and make their value as {L1val} and {L2val}.

Place a coupling directive in the form of:

K1 L1 L2 1

(with the 'Text type = spice' set in the right hand properties panel).

Then set the total inductance, for example

myindval

and a tap ratio of say

mytapratio:1

using a parameter statement:

.param Ltotal = myindval

  • N = mytapratio

then define the inductance each side of the tap using these expressions:

.param L1val = {Ltotal*(N/(N+1))**2}

  • L2val = {Ltotal*(1/(N+1))**2}

The square terms arise because the inductance is proportional to the turns ratio.

The N/(N+1) and 1/(N+1) terms are because both inductances are on the same core.

Documents

Tapped inductors

BOM

ID Name Designator Footprint Quantity
1 {L1val} L1 INDUCTOR-1206 1
2 {L2val} L2 INDUCTOR-1206 1
3 SIN(0 1 {1k/(2*pi)}) I1 2P-5.0 1

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