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i recently built this siple zero crossing circuit with input 5V 50Hz but i got a strange delay on the rising edge of the output pulse...im using 1megΩ resistors in series with my signal and an LM358, 1N4002 diodes. this delay can be seen here. any ideas? maybe noise causing this? how i could...
ahhh thanks for that. tried an exponential source and everything is fine :grin: i'll take into consideration the other suggestions during the design. thanks again :-P
hi all. im trying to simulate this voltage sensing circuit for the output voltage of a boost converter. its an LM358 + an IL300 linear optocoupler.
generally speaking the circuit seems to work fine in all the range of my output voltage [0-350V]
the only issue i have is that for a voltage >~...
yup i know about the module. these are TO-220AC switching diodes. ~2.5W losses each, 2.6A avg through them. i have them stock so i am not buying a bridge module :lol:
i also forgot to mention that my board has to layers! :-D
hi all, im working on a converter which includes a 3 phase rectifier bridge with diodes named like this...
i need to dispose them in such a way so the diodes can be placed on a heatsink beneath the board...pic
how could i dispose them in order to have the less copper tracks? is there a bit of...
well i think that the constraint in frequency is mainly imposed by the switching losses you will have. generally switching losses, are lower in a mosfet so you can use a higher frequency. note that bjt is current controlled so it has higher losses at base.
the same topology runs ok in orcad. same values, same simulator options (reltol, max step size), even with an output volage pi controller.
i just wanted to use multisim wich is easier to use and most of all, does not crash unexpectedly. But it is weird that simulation does not start...
well, it is actually a pfc converter, the boost converter is meant to work in dcm so that the inductor currents become spikes with a sinusoidal shape (input voltage reference). Filtered out they become a nice sine with a thd of about 10% :)
hmm. i removed the rectifier's ground. now simulation...
help with multisim simulation (sim error)
hi, i'm trying to simulate this pfc rectifier in multisim. simulation won't start because of convergence error. tried convergence assistant but also hints on multisim forums with no result :roll:. Tried virtual transistor and diodes. I tried max...
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