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Idea for IDEAL (!!!) AC-DC Converter


BeoLOVE
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Hi to everyone...
I'm new member and i want to help me to make my idea in reality.

In my highschoole for electronics i get an idea for ideal AC-DC coverter without transformer.
I made the circuit for small voltage (1-2 Vpp~) and as i expected it worked. In output there wasn't a broom voltage (the ~ components in output that is in range of microV) My profesor was also suprised about that. But he never give me a elan to coontinue to develop this idea for high voltage.

But now, after 4 years i'm student of Informatic science and i still love electronics and I realise that is so usefull idea for companies to make products without stabilizators.

Let me shortly explain my idea.
- On inputs i use the standard voltage AC ~220V/50Hz
- transforming this voltage to ideal DC -- 220V

I have one Q, so i can realize this idea.
So, please help me.

It is good idea to first to transform the input voltage then to converting to DC or DC 220V with Trimer/Potenciometer to regulate the voltage?

All the best and thanks for your help,
Elvis Hajdar

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  • 3 weeks later...
Guest Alun

This project is easier than you think.

All you need is a switched mode power supply.

The 220V AC is connected to a bridge rectifier, with filter capacitors, the voltage output will now be:

220 * 1.414 = 311.26 - 1.4 = 309.72VDC

To convert the 309.72VDC to 220VDC you need a buck switch mode regulator, they're a lot of chips available to perform this function. Most of them will have a maximum input voltage of <60V but we can get round this by using a very small zener regulator, and external transistors to buffer the internal switch.

Here are a few IC that might be of some use:
http://www.onsemi.com/pub/Collateral/LM2574-D.PDF
http://ww1.microchip.com/downloads/en/DeviceDoc/21365b.pdf
http://www.ee.washington.edu/stores/DataSheets/voltreg/tl497.pdf

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