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  1. H

    AC-DC Inverter Circuit Principles

    Thanks for the advice. Seems like a TL494 is the way to go as it appears to have all of the functions. My revised circuit thoughts are: Voltage reg - sinewave generator(50Hz)-TL494-op amp/s- power mosfets-centre tapped HF transformers. I'm hoping I've finally figured the basics out? I've done...
  2. H

    AC-DC Inverter Circuit Principles

    I'll bin my initial idea. Seems PWM is the way to go. How could I provide a "sensing" circuit for the 555 oscillator so that I can vary the pulse widths on the back of a reference sine wave. I think I can do the circuitry at the 555 side? Would I use some kind of function generator/ sinewave...
  3. H

    AC-DC Inverter Circuit Principles

    Many thanks for the advice. I have had several of the inexpensive(cheap) AC-DC inverters and they have all failed when used with multiple loads/ and or inductive loads(motors, etc). Even when the inverter rating exceeds twice that of the total loads i.e 1Kw load, 2Kw Inverter(4Kw Surge...
  4. H

    AC-DC Inverter Circuit Principles

    Can anyone offer some guidance to a newbie? Q- i'm trying to develop an 12v DC-230v AC 50Hz inverter. I'm staring with a 555ic as a simple base(no doubt I will have many unsuccefful attempts hence the "affordable(cheap)" nature of the circuit). Here's what I was thinking: Voltage...
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