power invertor with SX Chip

datacps

I am working on a new project to use the SX Chip to make a power invertor. I want to use the SX from a battery to switch a power transformer to make an AC power output. I was looking at the H Drives and found the Parallax H drive to power a motor. It uses the

HIP4081A

I was wondering if I could use the Transformer instead of the motor and would the output be good enough to power ac motors , Lights ect. I would also like to add PWM and speed control to change the frequency and duty cycle. Has anyone tried it? Can the Chip do it?

Also thanks to all the members who have help my in the past. This is really a great site with the best members.

JonnyMac

This kind of project has been on my mind for a while, too, though I haven't started doing anything about it. My initial thoughts were to use an easy D-to-A out of the SX (use eight bits and an R2R ladder) to get a [noparse][[/noparse]steppy] sine wave, then capacitively couple that into a push-pull amp that would drive a transformer for the final output. I may be out in left field, but that's where my mind is at the moment.

Phil Pilgrim (PhiPi)

For high-efficiency sinewave output, one method is to use a transformer with multiple primary taps, which you can drive selectively with fully-on or -off transistors. This helps to eliminate the I²R losses that accompany linear drive methods.

-Phil

Post Edited (Phil Pilgrim (PhiPi)) : 10/27/2007 8:36:27 PM GMT

datacps

I found some simple circuit to start to test with . Here is a simple one I found

http://www.uoguelph.ca/~antoon/circ/555dcac.html

datacps

Phil do you know where I can find the transformer you are talking about. I am going to use a Center Tap Transformer and use 2 mosfets.. ... I am also going to look at invertors chips and see if I can send a freqout comand to it and have it switch the two mosfets on and off at the right time.

datacps

Jonny Mac. I just want to pulse or send a frequency out and control 4 mosfets. It has to work from at least 50 to 400 HZ. I think I can use·1 mosfet driver to switch on 2 at a time. I think the SX Chip can put out four different low frequencies or should I generate 2 out and drive 4 mosfets. I wanted to use use a TC1414. and 4 mosfets so I could drive motors too. I am just a newbie.