Hey everyone, I have been using a SCR for discharging some high voltages. (up to 300V, few hundred uf). I recently found out that my inductive load would lock the SCR into the active state. This was annoying, but manageable by cutting off power to the area. However, I decided to add an optocoupler for more chip protection. The optocoupler has also made it difficult to keep the SCR from locking up, because it is on its own area of power. Furthermore, I am not using AC voltage, only DC, so I question the need for the SCR.
So....I have 2 questions:
-Can anyone recommend a NPN that can discharge higher voltages, at high energy (around 20J)? I have some IRF730....but I dont think they can handle much energy..just voltage.
-In the case of the SCR, Is there a simple way of keeping it from locking....like resistors or capacitors? In other words, keeping the thing explicitly off until and obvious signal happens?
Thanks.
So....I have 2 questions:
-Can anyone recommend a NPN that can discharge higher voltages, at high energy (around 20J)? I have some IRF730....but I dont think they can handle much energy..just voltage.
-In the case of the SCR, Is there a simple way of keeping it from locking....like resistors or capacitors? In other words, keeping the thing explicitly off until and obvious signal happens?
Thanks.