High Voltage 600V control using Arduino

Other Hardware General Electronics
1

I have to switch a high-voltage (0 - 600V AC) signal between three electrodes. The arduino will be programmed in such a way that a sequence of activation/deactivation of electrodes can be done.

For such a high voltage i am not sure what kind of transistors to use. The switch between the electrodes has to very fast (within milliseconds range).

Any suggestions on the electronic circuitory would be of great help.

2

Not to be rude, but it really doesn't sound like you're up for it... Switching high voltage AC isn't that straight forward and not without it's dangers.

And it's a real XY-problem, please explain into more detail :slight_smile:

3

My apologies, i am sure i am far from up to it.

I have a high-voltage amplifier which takes a TTL signal and applies high-frequency AC signal to an electrode. Now for this new application i need to switch that signal between three electrodes. 600V is the upper limit, usually it will be 100-150V.

For this switch i thought an arduino with power transistor would be a solution.
Previsouly i have done some low-voltage switching with relays.

4

Problem is, a transistor alone can't switch AC...

So do you really need the fast switching between them? Otherwise a relay would be a much more suitable.

5

I do need fast switching, however what kind of delay can be expected from a delay?

6

How much current do you need to switch?

A small relay would switch in ~10mS

Allan

7

Switched current will be less than 50 mA.

8

Google 'reed relays' - many types available. Switching times <1mS

Allan

9

You could have your arduino digital pin drive an optocoupler IC. The output of the optocoupler could then driver a FET gate driver IC such as UCC37322 which switches your FET.

10

And how handle the AC?

11

bitoff_arduino:
My apologies, i am sure i am far from up to it.

I have a high-voltage amplifier which takes a TTL signal and applies high-frequency AC signal to an electrode. Now for this new application i need to switch that signal between three electrodes. 600V is the upper limit, usually it will be 100-150V.

For this switch i thought an arduino with power transistor would be a solution.
Previsouly i have done some low-voltage switching with relays.

Before going too far with this, how will your amplifier react to having it's output momentarily open circuited while it's output is being switched?

Paul