1000V switching problem through microcontroller

[muhammadali_16]

hi.

i m working on some high Capacitor Discharge voltage surges.
my voltage is 835V and i have to discharge it to produce high energy spark. have done with generating, controlling and charging the capacitor

i just want to close the circuit base on some rules. for that conditions and rules, i will use pic micro-controller.


the problem is that i want to turn the HV on or off base on microcontroller i/o pin. can anyone suggest me which component should i use

 

[FoxyRick]

What are you discharging the capacitor into? (the air, a weld joint, a coil, etc)

How high is the peak current?

A quick thought is a high breakdown voltage triac, like the ST TPDV1225RG.

Also, opto-isolate the triac (or whatever) from the MCU and make sure that there is plenty of decoupling at the MCU.

 

[Er.abdulrehman]

this might help you.

https://www.pocketmagic.net/?p=2518

 

[muhammadali_16]

a resistor. a company require me 30J of energy to be discharged in a resistor. i have demonstrated the HV circuit and they are fine with it. now they wanted the controlled discharging. there are alot of conditions. the best options is using a pic-microcontroller 16f series.

the only problem is how i should turn on or off the main voltage?

please also tell me component number so that i could study the datasheet and implement it instantly

 

[FoxyRick]

We can't tell you a component number without more information. What resistance? Thus, what current? With that amount of energy stored, you could do a lot of damage!

If you are messing about with high voltage, high energy discharge circuits, you need to do some research and understand fully how to handle the issue.

 

[muhammadali_16]

current is nearly 100A jurk max

 

[FoxyRick]

How quickly do you need the switch to turn on? Why not tell us the exact load that the energy is being dumped into? How frequently will this happen?

 

[muhammadali_16]

the load is 15ohm to 400ohm and energy is 30J

 

[FoxyRick]

I guess that an IGBT (module) might be a good choice, but you will have to research parts that are available to you and find one that meets the requirements.

 

[muhammadali_16]

any other suggestion?

 

[FoxyRick]

Yes, do some reading up on high voltage, high current switching techniques, ;-)

 

[Er.abdulrehman]

you might use fuse (used to provide a soft start). this fuse must be shorted via software. one thing should be keep in mind that no reverse current should flow as it will damage the controller.

 

[muhammadali_16]

tell me component number of this FUSE?

 

[muhammadali_16]

anyone can help me out?