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Hi !
I need simulation models for scr, triacs and sidac to be loaded in the SIMetrix SIMPLIS circuit simulator.
Fornmat models to be Spice2 or Pspice
Any help will be pleasant
Thanks
Newton
FvM:
To be more precise, there are two SCR in an antiparallel configuration, and 2 SIDACS. This arrangmentis to allow a higher discharge current.
The circuit as is posted is for ignition of gas discharge bulbs, mercury vapour, or sodiun, but is going to be modified to ignite TIG torches...
Hi FvM !
Here is the circuit:
In the schematic the SIDAC symbol is a SCR and a SIDAC ( sidadc shunting the anode to the gate )
I am afraid that increasing the capacitor Cd and reducing the Rs the SCR-SIDAC could be continuously conducting.
Thanks for any advise
Newton
Hi FvM !
For sure 100A/us is the di/dt dynamic curret rise,
Thanks for your advise and sorry for my confusion. I just put a note in the post as "edit " to clarify my question.
By the way iI am looking for a method of incresi the scr holding current.
Regards
Newton
Hi All !
I have one capacitor discharging circuit with a 0.15 uF capacitor that discharge 230V into a 5uH coil at the rate of 120~360 times per second. The discharge is provided by a SCR, TYN1225, that have a holding current of 100A/us. The circuit worksfine, HOWEVER I want increase the...
Hi Okto2005 !
Thank very much !
I whent to the site you has sujested and get full info for the ZCD. I already apply the info in a circuit with 1 transistor. The result is nice. Good synch so far.
The coil used is coiled by myself, working as flyback converter. The zcd "trigger " a mosfet...
Re: Zero voltage detector
Do you mind to send the circuit diagram, and give more eetails ?
Thanks
Newton
Added after 1 minutes:
sorry, please explain
Thanks
Newton
voltage detector
Hi everyone !
Im looking for a zero voltage detector, a circuit that make a pulse every time that the line voltage (230V, 60Hz) cross the zero voltage.
It will be used to fire a thiristor or a IGBT.
Any suggestion ??
Regards
tig welder arc starter schematic
Here more information:
The TIG welder is machine that supplies 30~250A, 20~30V to the welding electrode. The electrode to start to weld needs a high voltage pulse. This pulse is synchonized with the AC line (230V, 40A, single phase)
The arc starter shall...
tig arc starter
Hi everyone !
Im newton, involved in the design of a arc starter for TIG arc weld. The project is running for 2 years, a lot of inprovements have been done.
Actually I need to synchronyze the arc starter with the line frequency (120Hz), a zero voltage cross circuit is...
frequency efficiency dc-dc converter
well, if you can pass the complete schematic I will take a look.
regarding the transformer, the solution is you wid yourself. No doubt.
newton.b@live.com
Added after 3 minutes:
regarding the transformer, the solution is you WIND the transformer...
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