All Forums  Electronics  Power Supply  How to convert 12 V DC to 12 V AC 50/60 Hz PSW

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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by David00[/i] [br]Read through most of the inverter forum posts looking for inspiration – including the 63 pages of “12/120V Inverter again” before posting… This started with me trying to power 12 V AC LED swimming pool lights - which are always spec’d as AC for historical (and consequently safety certification) reasons - from a hefty 12 V DC leisure battery. While they work fine using 12 V AC, they don't work off the battery. Most normal “AC” LED lights have a bridge rectifier on the input, so can run from DC. For whatever reason my pool lights can't. I tried up to 17 V DC just in case the lights relied on peak threshhold detection, without success. There's clearly some AC coupling involved. These pool lights are too $$$ expensive – and sealed – for me to tear down. There's no marking on the lights identifying them, and my local supplier isn't helping with this. I could convert 12 V DC to 120/230 V AC using a cheap commercial inverter then transform down again to 12 V AC (or possibly replace the inverter’s output transformer). And this may be the easiest and most cost-effective solution - but it's not ideal. I have an electronics background and designed stuff many years ago. Intellectual curiosity took hold, and wondered if I could make a simple low voltage 12 V DC to 12 V AC 50/60 Hz PSW converter based on a modern PSW inverter control chip – plus I wouldn’t need such high-voltage components for the power stage and keeping everything LV makes it inherently safer. As everything is off-grid and solar/battery powered, I'm looking for high-efficiency solutions. And I'd prefer the output to be pure sine wave - at a low (50 to 60 Hz) frequency, as I know the lights will work then. A MSW/square wave output may damage components over time, and as I said, these lights are expensive... While this started in response to a lighting challenge, it's now a more generic enquiry. I only need a 30 W output, but haven't found any low voltage low power inverters. I was wondering if there are simpler approaches, especially modular ones. I’ve been looking at single board drivers like Sunyima’s EGS002 module using their EG8010 controller chip. Can anyone share their experience of trying to do something similar? [/quote]    Insert an Image File (GIF, JPG, JPEG, BMP, ZIP, PNG) Check here to include your profile signature.