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# Easiest way to get 10kV at 10W from 24V?

#### cupoftea

Hi
Is the attached (LTspice and jpeg). thje easiest way to get 10kV at 10W from 24vin?

#### Attachments

• 24V to 10kV at 10W.jpg
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• 24V to 10kv at 10w.zip
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#### betwixt

##### Super Moderator
Staff member
I think I would look at a self oscillating step-up transformer arrangement with a single rectifier or maybe a voltage doubler. Some feedback to the bias should be enough to stabilize the voltage if that is needed.

Consider that old CRT TV sets used to generate 12Kv - 15Kv from an oscillator and single power transistor.

Brian.

cupoftea

### cupoftea

Points: 2

#### pjmelect

I have not done the calculations but I doubt that you would get 10W of power at the output and if you did the voltage regulation would be extremely bad. betwixt suggestion is good use a step-up transformer and tripler to get the voltage and power you require. You could get an old CRT TV and get the transformer ,tripler and driver transistor from that.

#### crutschow

Consider that old CRT TV sets used to generate 12Kv - 15Kv from an oscillator and single power transistor.
I think that went to around 25Kv for color sets.

##### Super Moderator
Staff member
Your load calculates as 1 mA and 10 MOhms. Here's an LC topology which might work (although I didn't build it in hardware). It doesn't require a jungle of diodes and capacitors, nor a transformer.

1) Op amp auto-detects resonant frequency of series LC.
2) Op amp changes state at proper times to drive the H-bridge.
3) As 24 VAC goes through the LC network, it's stepped up enormously.
4) Bridge voltage doubler is installed across capacitor. It generates 10 kV DC output to the load.

The step-up principle is the same as audio amplifier builders warn about when the output goes to a crossover consisting of a low-pass LC second-order. It must have a load attached. Because otherwise if a resonant note comes through the output, the voltage can soar to alarming levels.

Since your load is light, this concept might do the job. Real-life performance is hard to predict of course.