DC-AC inverter using function generator + Mosfet + Transformer

calvinhpk · 10th September 2009, 07:16 AM

Got a stupid idea, has anyone tried using a function generator or sine wave generator set to 50 or 60Hz, (powered by 12V battery, either DIY or off the shelf), pass through MOSFET for higher current, and step up transformer (eg. 12V to 110/230V) to achieve a pure sive wave DC-AC inverter, 110/230V...approx 1 to 3Arms?

danzup · 10th September 2009, 07:23 AM

Quote:

Originally Posted by calvinhpk

Got a stupid idea, has anyone tried using a function generator or sine wave generator set to 50 or 60Hz, (powered by 12V battery, either DIY or off the shelf), pass through MOSFET for higher current, and step up transformer (eg. 12V to 110/230V) to achieve a pure sive wave DC-AC inverter, 110/230V...approx 1 to 3Arms?

Yes , a lot !
That have been done also with tube on 1940...1960 !!
Nothing new , nothing remain to be discovered ...

calvinhpk · 10th September 2009, 07:30 AM

any examples and circuit to show??

Kurt von Kubik · 10th September 2009, 02:07 PM

Be aware!
This might be the lousiest way of powering audio equipment.
Noise is the problem, a DC/AC inverter creates thousands of times more noise than you will ever find in your wall outlet.
So if it isn´t for use far out in gods nature, try something else.

richie00boy · 10th September 2009, 02:21 PM

I looked into it years ago and decided it was a total waste of time. Just use a car amplifier.

Kurt, what he wants to do won't have a noise problem as he's trying to use a low frequency sine wave not SMPS.

calvinhpk · 10th September 2009, 03:46 PM

yeah...i guess it's 50/60Hz supply, shouldn't have noise problem....isn't it?

And, possibly a project for 300Vac power supply for tube

richie00boy....why you said it's a waste of time?

richie00boy · 10th September 2009, 03:54 PM

Because you need a huge transformer and big powerful stage to drive it, together costing at least as much as another amplifier. If your aim is to run an amplifier, it's far better easier and cheaper to just use an automotive amplifier.

sivan_and · 10th September 2009, 04:07 PM

WHAT A SHEAR WASTE OF ENERGY...this sort of linear converters in this age of GREEN power ?

ajazz · 10th September 2009, 04:27 PM

Yes it can be done !
Frequency Generator(XR2206) + Class D Amp(Naturally it's mosfet based) + Output boost Trafo = Pure sine wave (Green energy except for trafo losses)

sivan_and · 10th September 2009, 05:10 PM

this configuration is very old, u will find most of the UPS systems in INDIA using such configuration in inverter stage, the transformer is normal 50Hz type..uses mosfets / IGBT output stage...IR2110 in each arm in a bridge configuration

10th September 2009, 07:16 AM	#1
calvinhpk diyAudio Member Join Date: Oct 2004 Location: Kuala Lumpur	DC-AC inverter using function generator + Mosfet + Transformer Got a stupid idea, has anyone tried using a function generator or sine wave generator set to 50 or 60Hz, (powered by 12V battery, either DIY or off the shelf), pass through MOSFET for higher current, and step up transformer (eg. 12V to 110/230V) to achieve a pure sive wave DC-AC inverter, 110/230V...approx 1 to 3Arms?

10th September 2009, 02:21 PM	#5
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	I looked into it years ago and decided it was a total waste of time. Just use a car amplifier. Kurt, what he wants to do won't have a noise problem as he's trying to use a low frequency sine wave not SMPS. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

10th September 2009, 03:54 PM	#7
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Because you need a huge transformer and big powerful stage to drive it, together costing at least as much as another amplifier. If your aim is to run an amplifier, it's far better easier and cheaper to just use an automotive amplifier. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

10th September 2009, 04:07 PM	#8
sivan_and diyAudio Member Join Date: Dec 2004 Location: Dxb / India	WHAT A SHEAR WASTE OF ENERGY...this sort of linear converters in this age of GREEN power ? __________________ SivanandBalan

10th September 2009, 05:10 PM	#10
sivan_and diyAudio Member Join Date: Dec 2004 Location: Dxb / India	this configuration is very old, u will find most of the UPS systems in INDIA using such configuration in inverter stage, the transformer is normal 50Hz type..uses mosfets / IGBT output stage...IR2110 in each arm in a bridge configuration __________________ SivanandBalan


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10th September 2009, 07:30 AM	#3
calvinhpk diyAudio Member Join Date: Oct 2004 Location: Kuala Lumpur	any examples and circuit to show??

10th September 2009, 02:07 PM	#4
Kurt von Kubik diyAudio Member Join Date: Feb 2009 Location: Viby, Denmark	Be aware! This might be the lousiest way of powering audio equipment. Noise is the problem, a DC/AC inverter creates thousands of times more noise than you will ever find in your wall outlet. So if it isn´t for use far out in gods nature, try something else.

10th September 2009, 03:46 PM	#6
calvinhpk diyAudio Member Join Date: Oct 2004 Location: Kuala Lumpur	yeah...i guess it's 50/60Hz supply, shouldn't have noise problem....isn't it? And, possibly a project for 300Vac power supply for tube richie00boy....why you said it's a waste of time?

10th September 2009, 04:27 PM	#9
ajazz diyAudio Member Join Date: Apr 2005 Location: INDIA	Yes it can be done ! Frequency Generator(XR2206) + Class D Amp(Naturally it's mosfet based) + Output boost Trafo = Pure sine wave (Green energy except for trafo losses)

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