Don Smith LTspice Sim

Author Topic: Don Smith LTspice Sim (Read 16724 times)

duff	Don Smith LTspice Sim « on: 2012-03-11, 04:01:21 »
Group: Guest	All, I need help with a Don Smith LTspice sim I've been working on. The problem is that it is showing a COP of 1.128 ------------------------ don_smith_table_top-ou.asc (5.76 kB - downloaded 727 times.) Don Smith LTspice Sim don_smith_table_top_waveform-02.png (85.2 kB, 1011x612 - viewed 3061 times.) Don Smith LTspice Sim don_smith_table_top_waveform-02c.png (61.67 kB, 1021x996 - viewed 2461 times.) don_smith_table_top-ou.net.txt (1.97 kB - downloaded 665 times.) « Last Edit: 2012-03-11, 06:27:32 by duff »

EMdevices	Re: Don Smith LTspice Sim « Reply #1 on: 2012-03-11, 06:02:56 »
Hero Member Posts: 805	why don't you integrate from 5 to 6 ms. Starting at 0 s is before steady state has been reached.

duff	Re: Don Smith LTspice Sim « Reply #2 on: 2012-03-11, 06:10:29 »
Group: Guest	EM, I'm starting the integration at 4ms. .tran 0 10.6m 4m If I start at 0s I get a COP of 1.059 pin: INTEG(v(vs)i(v1))=-13.0589 FROM 0 TO 0.0106 pout: INTEG(v(vout)i(rl))=13.8418 FROM 0 TO 0.0106 cop: (pout/pin)=-1.05995 Edit1: I think you misinterpreted what I was saying. The efficiency greater than 100% Yes I am delaying recording of data 40ms to overcome the initial power draw establishing a somewhat steady state condition. I am trying to get the simulation back to realistic conditions. Edit2: In case anyone is interested, I figured this out. Determining the input impedance and setting the Source series resistance equal to that value corrected the problem. It now show realistic results. « Last Edit: 2012-03-12, 12:08:52 by duff »