I am working with a professor who wants me to create a circuit that mimics our lab testing setup, but using a microprocessor instead of a square wave generator.
The task is to essentially produce a +/- 100 square wave at 1 kHz. I've designed the circuit (attached) but it’s not working. I used an Emco DC-DC boost converter (AGH30P-5) with 200v output and a voltage divider to create +100 V and -100 V. I am using a solid state relay (Broadcom ASSR-302C-002E), to control the output.
I have a ESP8266 microprocessor which provides the 1kz on a GPIO, and I am able to drive one half of the SSR with the GPIO high and the other side with the GPIO low. That works fine – I was able to have 2 leds driven by the SSR in opposite phase showing (a slower) square wave.
But when I try to switch the 100v through the SSR (mosfet), only one side of the DC will oscillate. It doesn’t matter which side of the relay I use and it’s not affected by polarity. But for some reason one output of the divider referenced to HV ground won’t switch.
I’m stumped but I suspect this is related to some feature of the EMCO part. Any help would be appreciated!
The task is to essentially produce a +/- 100 square wave at 1 kHz. I've designed the circuit (attached) but it’s not working. I used an Emco DC-DC boost converter (AGH30P-5) with 200v output and a voltage divider to create +100 V and -100 V. I am using a solid state relay (Broadcom ASSR-302C-002E), to control the output.
I have a ESP8266 microprocessor which provides the 1kz on a GPIO, and I am able to drive one half of the SSR with the GPIO high and the other side with the GPIO low. That works fine – I was able to have 2 leds driven by the SSR in opposite phase showing (a slower) square wave.
But when I try to switch the 100v through the SSR (mosfet), only one side of the DC will oscillate. It doesn’t matter which side of the relay I use and it’s not affected by polarity. But for some reason one output of the divider referenced to HV ground won’t switch.
I’m stumped but I suspect this is related to some feature of the EMCO part. Any help would be appreciated!