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Sine wave inverter | 17 comments (17 topical, editorial)

Re: Sine wave inverter (none / 0) (#7)
by kmitchel on Mon Nov 3rd, 2003 at 05:02:31 PM MST
(User Info)

I believe it's more like a class D amp. The MOSFET's are either on or off. It would be nice to see this inverter futher developed, but I am grateful the author posted the work he did do. As far as the transformers, maybe...http://members.tripod.com/~schematics/xform/xformer4.htm
I was kind of suprised he used two in parrallel. I think in any homemade high VA invter transformers would be a problem. I kind of question how cost effective a homebrewed inverter is, and whether it's better in the long run to buy a commercial inverter. Maybe multiple small (cheap) inverters tasked to specific applications. And get a smaller true sinewave inverter just for the stuff that really needs it.

[ Parent ]

Re: Sine wave inverter (none / 0) (#8)
by laskey on Mon Nov 3rd, 2003 at 06:33:35 PM MST
(User Info)

I was thinking of doing some modifications to commercial inverter. You know smooth the steps out before they are amplified in a everyday old cheap inverter. Honestly, How hard could it be?

Cya,
Chris

[ Parent ]

Re: Sine wave inverter (none / 0) (#9)
by Budgreen on Tue Nov 4th, 2003 at 10:57:35 AM MST
(User Info)

it could be fairly hard and not worth the time.. most inverter ups systems that have non-square wave outputs normally use a microprocessor to create the waveforms and do the rest of the inverter control. if you could read the software off it and recode it would be very possible but quite time consuming :)

on another note you could start and make a dc-dc converter first say 24vin 170v out.. pwm controlled, take a recitfied 170v out and run it to an H-bridge, controll the H bridge with a 10-25khz pwm signal modulated by a 60hz stable sine wave, then filter the output of the H-bridge to remove the 10-25khz pwm frequency and your left with a nice sine wave output at a high efficiency.

I have been trying to come up with a good dc-dc converter information to try and design a 24v-170v converter (that in itself is easy, just getting it to put out 10-20A is the hard part) so if anyone could help in this arena I may have schematics available by the end of the year :)

[ Parent ]

Sine wave inverter | 17 comments (17 topical, 0 editorial)

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