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hi dear friend .
i draw the commutation and zero crossing point .
but i dont know when i must fire the thyristors.
on commutation point ?which thyristor ?
best regards
OK dear friend . it's true .
i will modify the circuit according to your guide .
because i use of pulse trans former ,must i use of which zero crossing? i must sense zero crossing between two phase like below :
oh
i know it . (i know that wave in three phase is how .
dear friend . i searched a lot and i design and make a circuit .
i am no a Lazy boy , dear friend .
but i ask question to find the problem .
i use of pulse transformer for gate trigger .
it's my circuit (pcb):
and its zero...
hi
dear friend .
i don't know how to simulate a 3 phase system in excel .
please introduce document about my problem and design three phase ssr .
(i have education MATLAB)
regurds
Hi
my intention is on/off a 3 phase heater (250KW) .
in real i want control the temperature with PWM . but i need to reduce bad harmunic that it inject to network .
thank you for your answer ,dear klaus .
is your mean that i must trigger tristor's ( R+, S+, T-) on zero crosing of R phase ?
if not , please explain me more .
thank you dear klaus .
Hi dear friends
i use 6 thyristor as switch in 3 phase like below:
i trigger each thyristor on zero time in its phase . (i use zero crosing).
it work when neutral is connect on star center .but it don't work when the neutral wire is disconnected .
what is the problem ?
i think for...
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