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Re: Dual Active bridge
After adding Rser=1 ohm to V9: The average current from V9 is 5.858 Amps, compared to the 8 Amps you said yours had.? Our simulations should not have differed by more than 2 Amps!? Something is
By Andy I · #160303 ·
Re: Calculate average value of a waveform under specific conditions using .meas command
That is true, IF Ankit wants to know only the long-term average of the voltage waveform.? But this is for a thesis project, so I assume it is somewhat research related, and he might want to know
By Andy I · #160302 ·
Re: Calculate average value of a waveform under specific conditions using .meas command
I question whether taking the derivatives of the waveform is good or bad.? Since there is ringing, it might manifest itself as large spikes in the derivative, which could mess up those .MEAS
By Andy I · #160301 ·
Re: Dual Active bridge
Wow!? Which schematic was that?? What makes our simulations so utterly different? I used dd.asc with UIC removed.? The input current from V9 is hardly sinusoidal.? If you had sinusoidal current,
By Andy I · #160300 ·
Re: Dual Active bridge
Set Lp = 2,3mH Ls=5,1mH Llkg=76uH . Imagn=magnetizing current =8% of primary peak current, Llkg = 3% of Lp (values chosen for 30KHz). Imagn/Ipeak may be a little bit higher, i.e. 15% A small gap
By Udo Huhn-Rohrbacher · #160299 ·
Re: Dual Active bridge
Without UIC, it runs under version 24.1.8. The input voltage is 100 V, the input current is 8 A DC plus 8A peak roughly sinusoidal (so the current goes from 0 to 16 A). The output voltage is 132 V DC
By John Woodgate · #160298 ·
Re: Calculate average value of a waveform under specific conditions using .meas command
Dear Tony, I am new to LTspice, and everyone is trying to help me with my query. You have put time in providing me solutions and so has Andy. I am thankful to both of you. You are again correct,
By ankitk.ace@... · #160297 ·
Re: Calculate average value of a waveform under specific conditions using .meas command
The rise and fall characteristics are only 2nd order effects - linear or exponential, it makes little difference. If you actually plot the derivative of the waveform, you get very pronounced spikes at
By Tony Casey · #160296 ·
Re: Calculate average value of a waveform under specific conditions using .meas command
Dear Tony, Thank you for answering again. I believe I will have to finding the maximums and minimums localized to a specific time interval (example: 10 ms to 11 ms) and then do the rest. Your answer
By ankitk.ace@... · #160295 ·
Re: LTSpice, easy uF / uH with UTF16 saved schematic
Also, the comments in the two new uploaded files are somewhat misleading. "u" is always ASCII 0x75, when encoded with the normal ANSI character set. "?" is extended ASCII 0xB5, when encoded as a
By Andy I · #160294 ·
Re: LTSpice, easy uF / uH with UTF16 saved schematic
That lacks backwards compatibility to anyone using an older version of LTspice.? (Yes, there are still some out there with old XP computers who do not wish to - or can't - upgrade to a newer
By Andy I · #160293 ·
LTSpice, easy uF / uH with UTF16 saved schematic
LTspice default will save schematic (*.asc) as ANSI ASCII file. uH or uF, the "u" is extended ASCII "0xB5", "mu" (?) to mean micro, see the glitching and comments,
By wai wai · #160291 ·
Re: Simulation of MMC 3-Level on Ltspice
Bouzid.wis, I am having trouble trying to understand how this circuit works. In the upper submodule, it seems like M1 can not do much, because C1 would charge and then not pass any more current, so
By Andy I · #160290 ·
Re: Dual Active bridge
Using computer #1 today, so it is lowly LTspice XVII.? Not LTspice 24. You night have been hit by a yet-to-be-fixed bug - er, I mean side effect they added in version 24.1.x. Andy
By Andy I · #160289 ·
Re: Dual Active bridge
That is a somewhat difficult question for me to answer.? Maybe others can speak to this better than I can. But I think the answer is "yes", I think it is normal. Because the waveforms are not
By Andy I · #160288 ·
Re: Dual Active bridge
I think that problem goes away if you get rid of the UIC.? There is no need for UIC here.? Don't use it unless it is needed.? Change: .tran 0 100m 0 uic to: .tran 0 100m 0 or: .tran 100m or even
By Andy I · #160287 ·
Re: Dual Active bridge
It should not be much larger than output current x output voltage/input voltage. That is, power out/input voltage. But I already told you that there is a very large inrush current because of the large
By John Woodgate · #160286 ·
Re: Simulation of MMC 3-Level on Ltspice
I don't know if this matters in your simulation, but you have started with much less than a sine wave.? 9 ms is less than one-half cycle of 50 Hz.? The output waveform does not seem right, however.
By Andy I · #160285 ·
Re: Simulation of MMC 3-Level on Ltspice
Remember to use English only in this group. Translation:? "I have uploaded the ltspice file under the name M2C single-phase SPWM112 to Temp" Note:? The actual filename is "M2C single phase
By Andy I · #160284 ·
Re: 90nm CMOS technology
That is true, and it's something I often remind people about. Sure you could grab some random "90nm" model file and play around with it, but don't use it to model any actual circuits that you plan on
By Andy I · #160282 ·