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Offline High Voltage AC Power Supply

This is a high voltage, low current, offline, AC adjustable power supply for electronic/electrical experiments. This power supply is mainly design for switch mode power supply (SMPS) experiments and to drive basic high voltage electrical circuits. Thanks to the isolated step-up transformer this power supply breaks the ground loop and provides shock free – safer high voltage output. This offline (or isolation) feature preventing accidental current from reaching ground through a person's body.

This unit generates 50Hz or 60Hz (selectable at runtime) square wave AC output, and it is capable of generating output voltage between 150V – 290V AC (on no-load state).

Prototype version of offline high voltage AC power supply

As stated above this power supply unit is mainly design for SMPS experiments. This is not work well with liner power supplies because transformers in linear power supplies are get overheating from square wave inputs generated through this unit.

This is a high voltage project. Make sure to insulate all the connections, and install this unit in a "high voltage safe" enclosure. Before applying power make sure to check all your connections and external wirings.

This is an open hardware project. All the project schematics, wiring diagrams and PCB designs are available to download at here.

Please note that this power supply is design for low current – high voltage experiments. Do not attempt to drive your refrigerator or electric drill through this unit.
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Comments

Emily said…
Hello, I'm an electric engineer & I'm engaged in making Ac Dc Adapter for last 10 years. Actually, maximum efficiency is a prime consideration for all SMPSs, but even more so for those found in portable devices, where battery life must be prolonged to offer consumers extended run time while using their favorite gadgets and toys. High efficiency is also a must for those designs that require improved thermal management, or where the cost of providing power is of concern.
Thanks:)
September 19, 2012 at 7:33 PM
Diana- power adapter said…
I've come up with a circuit using a flyback transformer (from an old computer monitor) and a 555 timer that charges the caps significantly faster, but I'm still working out the bugs. My current version has a flyback with a 15 turn primary and a 400 turn secondary. I used 22awg on the primary and 28awg on the secondary.It charges to 380v in about 10 seconds with a 13.8v input (could use a zvs driver for more power). I need to get some high speed diodes to rectify the output. I have been using 1N4007's but they are too slow. I will get some UF4007's instead. thanks!
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visit my website
April 26, 2013 at 4:29 PM
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