Hi guys,
I have used the following image circuit to control the load.
AS you see the SCRs are controlled by AC signal and The opto-triac is always ON. If the load is a resistor, When the AC signal is positive the current passes through the SCR1 and when it's negative it passes through the SCR2 and when the AC voltage is around the Zero both of the SCRs block the current. It's clear because the gate cathode current is Low.
my problem is that if I use an inductive load instead of the resistor there will be 90 degree phase difference between current and voltage. Now does the SCRs block the current at zero voltage ? If yes how can I prevent it. (The load is inductive and blocking voltage at zero voltage leads to switching at the maximum current so there will be inrush current.)
Thanks
ALIREZA
I have used the following image circuit to control the load.
AS you see the SCRs are controlled by AC signal and The opto-triac is always ON. If the load is a resistor, When the AC signal is positive the current passes through the SCR1 and when it's negative it passes through the SCR2 and when the AC voltage is around the Zero both of the SCRs block the current. It's clear because the gate cathode current is Low.
my problem is that if I use an inductive load instead of the resistor there will be 90 degree phase difference between current and voltage. Now does the SCRs block the current at zero voltage ? If yes how can I prevent it. (The load is inductive and blocking voltage at zero voltage leads to switching at the maximum current so there will be inrush current.)
Thanks
ALIREZA
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