pns2050
Junior Member level 1
Hello,
I am trying to do my Senior year project which is a DC to three phase AC inverter.
I am trying to achieve that using Gate turn off thyristors(BT-157) and PIC16f88 for triggering.
The problem is that PIC does not output negative voltage which is needed to turn off the GTO thyristors.
I tried to use an op-amp(LM741) in inverting mode to inverse the polarity of PIC's output , which indeed seemed to work on oscilloscope but when i tried to turn off/on the thyristor's the results weren't positive.
Would it be possible to control them the way i am trying or should i look to another direction ?
I really spent a lot of time trying to figure this out and cant get it to work , any Hint/Idea would be appreciated.
Thank you
I am trying to do my Senior year project which is a DC to three phase AC inverter.
I am trying to achieve that using Gate turn off thyristors(BT-157) and PIC16f88 for triggering.
The problem is that PIC does not output negative voltage which is needed to turn off the GTO thyristors.
I tried to use an op-amp(LM741) in inverting mode to inverse the polarity of PIC's output , which indeed seemed to work on oscilloscope but when i tried to turn off/on the thyristor's the results weren't positive.
Would it be possible to control them the way i am trying or should i look to another direction ?
I really spent a lot of time trying to figure this out and cant get it to work , any Hint/Idea would be appreciated.
Thank you