LTSpice: Three Different Ways to Simulate Voltages and Currents in AC Circuit
ElectronX Lab ElectronX Lab
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 Published On Feb 11, 2022

This video shows three quick and easy ways to simulate an AC circuit to determine voltages and currents for all the components.

00:00 - Introduction
00:21 - Build Circuit
01:12 - 1st Method: Use .meas to measure amplitudes and phases (see below for the .meas directives used
06:35 - 2nd Method: Use AC sweep at a single frequency
08:18 - 3rd Method: Use AC sweep on a range of frequencies and determine required values from Bode Plot
12:42 - Special appearance

This example comes from a free, online, open source textbook. Find the chapter here:
https://www.electronx.ca/education/ac...

Circuit analyzed by hand:    • RC Series Circuit: Calculate Voltages...  

.meas commands
.meas tran t1 trig v(Vs)=0 rise=9 targ v(Vs)=0 rise=10
.meas tran t2 trig v(Vc)=0 rise=9 targ v(Vs)=0 rise=9
.meas tran t3 trig (v(VS)-v(VC))=0 rise=9 targ v(Vs)=0 rise=9
.meas phase_r param 360*(t3/t1)
.meas phase_c param 360*(t2/t1)
.meas Vs_max max v(Vs)
.meas VC_max max v(Vc)
.meas VR_max max (v(Vs)-v(Vc))

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