100KV high voltage generator voltage doubler circuit based on stm32

gandong

100KV high voltage generator voltage doubler circuit based on stm32 [Copy link]

The high voltage generator can simulate various interferences such as static electricity and pulse groups, and can perform insulation tests. The general circuit structure diagram is as follows

Voltage doubler circuit principle

Here we mainly talk about the high-voltage generator part, which adopts the stm32 DDS principle to control the internal DA to simulate various signals, isolate and boost the voltage through a transformer, and then use a voltage doubling circuit to convert AC into high-voltage DC.

A power amplifier chip is used to amplify the small signal, and a step-up transformer is added after driving.

The transformer can increase the AC voltage and also play an isolation role. The voltage doubler circuit after the transformer further increases the voltage.

During the PCB production process, pay attention to the electrical clearance and creepage distance to avoid self-discharge, and pay attention to personal safety during debugging!

maychang

It's just a 1kV voltage, and instead of using so many times the voltage, it would be better to put some effort into the transformer, and the cost can be reduced a lot.

It seems that the designer doesn't know much about transformers.

maychang

Changed to 100kV?

If the output is 100kV, C3~C20 use capacitors with a withstand voltage of 1000V, and C22 uses a capacitor with a withstand voltage of 2000V. Wouldn't this mean the lives of these capacitors are in jeopardy?

maychang

Besides, the output requirement is 100kV, and diodes such as D1~D18 can’t bear it!