Thursday, November 01, 2007

High Voltage DC Power Supply

This circuit generates 10-20kVDC depending on the input voltage using a rectified flyback transformer typically found in Computer CRT monitors. It is suitable for driving HV loads such as Marx Generators and Lifters.



Here is a video of me testing the HV supply - notice that I am only using one hand!! This is good practice even though the current in this case is too low to kill me.



The basic circuit is a 555 timer running astable around 17-18kHz, wired to a Power MOSFET which chops the supply voltage wired to the primary of the transformer.The power MOSFET is a low resistance type (IRFP450) to keep heat dissipation to a minimum. This will reduce the heatsink requirements substantially.

1 comment:

benthomasson said...

Something is messed up with this post.