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1000V switching problem through microcontroller

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muhammadali_16

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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

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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.
 

muhammadali_16

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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

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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.
 

FoxyRick

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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?
 

FoxyRick

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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.
 

FoxyRick

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

Er.abdulrehman

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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.
 

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