How can I switch 1500V DC using Power Mosfets or IGBTs ?

[baileychic]

How can I switch 1500V DC using Power Mosfets or IGBTs ?

I need to get a pulse of 1500V DC (+/-) at the output of the Mosfet or IGBTs. The current rating will be 20mA at 1500V DC. Which FET driver and which N Channel Mosfets or IGBTs I have to use. The output will have both +1500V and -1500V in the pulses. It will be like a square wave. First I need to make a simulation in Proteus using say 500V DC and 900V type Mosfet. Later I will implement it on hardware. Should I go for Push Pull topology ?

I will be using PIC18F26K22 microcontroller for the project. Mosfet switching speed is 100 Hz.

Edit:

I found that I can use IXTH1N200P3-ND N Channel Power Mosfet for the application. Please answer my other questions about which FET driver I can use and which switching topology I have to use to get square wave of +/-1500V DC.

 

[KlausST]

Hi,

you say Dc, but then you say +/- 1500V.
To me it´s not clear what you mean.
What is your idea to generate these pulses. Schematic / draft?

What driver to use depends on the schamatic and the expected rise/fall time of the output signal.

First I need to make a simulation in Proteus using say 500V DC and 900V type Mosfet.

Why the limitiation to 500V or 900V? It´s not more dangerous to simulate wiht 1500V. ;-)

Should I go for Push Pull topology ?

We don´t know if you need it or not.

I will be using PIC18F26K22 microcontroller for the project.

More important (for choosing the driver) is the signal level, than the microcontroller type.

Klaus

 

[FvM]

You can buy multi kV HV switches using cascaded MOSFET with floating drivers from small specialized manufacturers, used e.g. in scientific instruments.

May be someone knows a ready-to-make schematic or at least general guidelines from a paper.

Pulse rise time is more critical than rate, I suppose. What's your intended specification, what's the load capacitance?