Various aspects of home brew inverters

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Solar Mike

Joined: 08/02/2015
Location: New Zealand
Posts: 1105
Posted: 10:13am 30 Mar 2017      

  Madness said  Do you know what components they have used for the Snubbers? Also on that link I posted they appear to have a cap identical or very similar to the 0.1uf piggybacked on a resistor near each pair of TIPs.

Glad you asked to look at it again, I put my glasses on this time, that cap is wired in parallel to the 5k resistor; also there are no snubbers on the board. I have added to my schematic below. Doesnt seem logical to place a cap of that size there, unless they intend to delay the switching of the lower bridge relative to the upper, but it will be loading down the booster circuit with extra capacitance.