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Re: LTspice XVII problems...
¿ªÔÆÌåÓýI must admit to being pleased that asking my pre-release version to do a sync release has resulted in the download of 30-something megabytes and it now reports as the full release. ? ? ? From: LTspice@... [mailto:LTspice@...]
Sent: 29 July 2016 15:04 To: LTspice@... Subject: Re: [LTspice] Re: LTspice XVII problems... ?
On 07/29/2016 04:29 AM, Tony Casey tony@... [LTspice] wrote:
-- ? AC2CL ? I do not think there is any thrill that can go through the human heart like that felt by the inventor as he sees some creation of the brain unfolding to success... Such emotions make a man forget food, sleep, friends, love, everything. ? - Nikola Tesla ?
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Re: XVII
One Mike wrote: ? ?"Windows XP is not supported." The other Mike wrote: ? ?"XVII runs fine in Wine 1.2.2 in Ubuntu 10.04. This version is from ? ? April, 2010 and it only supports Win 95 to Win XP." ?I think this was mentioned before.? Although a version of Wine might emulate only up to Windows XP, it is not Windows XP itself, and it might have many more "hooks" and low-level capabilities than an authentic MS-Windows XP has.? A direct comparison would not be fair. Andy |
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Re: LTspice XVII problems...
¿ªÔÆÌåÓýHi TonyI didnt know that. Gonna give it a try. Thanx! Al D. On 07/29/2016 04:29 AM, Tony Casey
tony@... [LTspice] wrote:
The 64bit LTspiceXVII will only be installed if you've taken the trouble -- AC2CL I do not think there is any thrill that can go through the human heart like that felt by the inventor as he sees some creation of the brain unfolding to success... Such emotions make a man forget food, sleep, friends, love, everything. - Nikola Tesla |
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Re: Is direct contact okay?
One can make a reasonable guess about the CT core dimensions from the data sheet, but it is not clear what the material is.? High quality CTs use tape-wound nickel-iron cores to keep magnetizing current to a minimum, but your CT has a split core, which probably introduces enough of an air gap that they might use ordinary transformer steel, since it is less expensive and magnetizing current would be dominated by the gap.? However, the difference still matters because you care about saturation and nickel-iron has only about half the saturation level of regular transformer steel (the core losses are lower, too).
It is easy to guess your application, you are most likely using MOSFETs to time multiplex the output of the CT between normal current sensing and supplying power for the current sense circuitry.? No doubt you are wondering how the build up of magnetizing current will affect the accuracy of the sensed signal and how much power you get with a relatively low duty cycle in power mode. ---In LTspice@..., <4vl7aujnwrex7ropketfjd7le5afsie4zyue7rcb@...> wrote : Bordodynov and analogspiceman If you could please direct Email me at HKafeman@..., then I can give you some more details of the CT, etc. Thanks and Regards Henry Kafeman |
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Re: Is direct contact okay?
Hello Henry Kafeman.
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The primary winding of the current transformer comprises a single turn. The current transformer is loaded by a small impedance in magnitude (relative). The consequence of this effect strong demagnetization. Therefore, the effect of magnetic saturation of the core needs huge currents. Bordodynov. 29.07.2016, 14:46, "4vl7aujnwrex7ropketfjd7le5afsie4zyue7rcb@... [LTspice]" <ltspice@...>: analogspiceman |
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Re: Is direct contact okay?
analogspiceman
Thank you for your reply. Yes we want to avoid saturation, but we are using the Current Transformer in two modes, for Energy Harvesting and Measurement. To this end we are changing the load it is connected to between the Modes and also switching in varying Burden resistance values. Hence we would like to try to model the behaviour across a wide range of Primary currents to see the effect and to make sure that we understand what is happening and whether saturation becomes an issue. Also we need to understand the effect of a wide range of operating temperatures.... I have asked the manufacturers if they can supply the relevant details for the model, but so far, they do not seem to be able to give me anything more than the basic details and a test result excitation curve! Thanks and Regards Henry Kafeman |
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Re: LTspiceXVII released
Hello Helmut,
Try the second example from Help (just paste it into an empty schematic as SPICE text).? It is true that the outputs will sum together like current sources, but the value of the load resistors has no effect on the output amplitude.? Please try it and report back. ---In LTspice@..., <helmutsennewald@...> wrote : Hello analogspiceman, > The state machine appears to have a bug.?? > The nominal output amplitude is 1mV rather than 1V, so the output equations must be multiplied by 1k.?? > For example: .... I have asked Mike about the 1mV.? -- The state machine puts out milliamps, not amps.? That is the way it is supposed to work. --Mike Helmut .? |
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Re: LTspiceXVII released
John Woodgate
¿ªÔÆÌåÓýIt's obviously a very small state, like Monaco or the Vatican. (;-) ? With best wishes DESIGN IT IN! OOO ¨C Own Opinions Only J M Woodgate and Associates Rayleigh England ? Sylvae in aeternum manent. ? From: LTspice@... [mailto:LTspice@...]
Sent: Friday, July 29, 2016 11:42 AM To: LTspice@... Subject: [LTspice] Re: LTspiceXVII released ? ? Hello analogspiceman, ? ? > The state machine appears to have a bug.?? > The nominal output amplitude is 1mV rather than 1V, so the output equations must be multiplied by 1k.?? > For example: .... ? I have asked Mike about the 1mV.? ? -- The state machine puts out milliamps, not amps.? That is the way it is supposed to work. --Mike ? Best regards, Helmut ? |
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Re: LTspiceXVII released
Hello analogspiceman,
> The state machine appears to have a bug.?? > The nominal output amplitude is 1mV rather than 1V, so the output equations must be multiplied by 1k.?? > For example: .... I have asked Mike about the 1mV.? -- The state machine puts out milliamps, not amps.? That is the way it is supposed to work. --Mike Helmut .? |
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Re: LTspice XVII problems...
keantoken wrote:
"Also the Help dialog comes up but none of the help pages will show. I think this could be a misconfiguration somewhere in Linux but I don't know where." If the Help doesn't load, you need to install wine-gecko into the same WINEPREFIX as LTspice. Wine-gecko implements a cut-down sort of Internet Explorer. It used to be possible to force the LTspice CHM Help file to be displayed by a native Linux CHM viewer like kchm with a registry hack, but this stopped working a couple of years ago and I haven't tried it since. You can similarly coerce most applications running in WINE to use a native Linux application for specific file types, i.e. PDFs by a similar (WINE) registry hack. Regards, Tony |
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Re: LTspice XVII problems...
keantoken wrote:
"Any thoughts on why it would not detect my 64-bit system?" The 64bit LTspiceXVII will only be installed if you've taken the trouble to create a 64bit WINEPREFIX. Left to its own devices, WINEPREFIX will default to win32, therefore the X86 will be installed. If you just install all Windows application into default .wine environment, you will only get 32bit versions. To create 64bit WINEPREFIX and install 64bit LTspiceXVII there, you type this in a terminal window: env WINEPREFIX=$HOME/.ltspice64 WINEARCH=win64 wine "path-to-LTspiceXVII-installer" I have noticed that even when the 64bit version is installed, a sync update pulls in the 32bit executable as well. Regards, Tony |
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Re: XVII
> --- LTspice? Announcements ---
> LTspice XVII runs on 32- or 64-bit editions of Windows 7, 8 or 10. > Windows XP is not supported. Windows XP users can run LTspice IV, > which will still be available in observance of Linear Technology > Corporation's zero obsolescence tradition. > Mike Engelhardt > Manager of Simulation Development > Linear Technology Corporation XVII runs fine in Wine 1.2.2 in Ubuntu 10.04. This version is from April, 2010 and it only supports Win 95 to Win XP. Mike |
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Re: LTspiceXVII released
Hello analogspiceman > The state machine appears to have a bug.? The nominal output amplitude is 1mV rather than 1V, so the output equations must be multiplied by 1k.? For example: > > .output (2) (V(1)<.5)*1k > .output (3) (V(1)>.5)*1k > .output (4) state*1k What is this state machine? LTspice says "unknown control card .output...". I tried with a notmal voltage source, then with a NAND gate, the help has nothing on .output, the net seems to have no answers. How do I get there? Vlad ______________________ -- holding, among others: a universal analog/digital filter, block-level models for power electronics (and not only), math blocks with a more stream-lined approach, some digital ADC, DAC, (synchronous-)counter, JKflop, etc. |
Tony Casey