Inverter Schematics

  
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A small bias on the bases of Q1 and Q2 via R1 and R2, assists in `starting` This gives each transistor`s base a small forward bias, so that both transistors tend to conduct when the circuit is first switched on [the base voltage on each transistor is zero when circuit is first switched on, so the small forward biasing thru R1 and R2 results in an
Inverter Schematics - schematic

above zero voltage at each base]. Use of IC timing [clock] circuitry, along with quality core materials for the transformers and possibly JFET`s wil increase the accuracy, and decrease the losses, making the Inverter more efficient. The transformers` coils and cores will need to be large, since the output Hz required is 60Hz. If this was part of a DC to DC converter, or if this was used for Frequency Inversion [input = low Hz, output = High Hz], then the clock circuitry can be set for a higher Hz. like 40KHz [or what ever the output Hz will be]. Being up in that range will reduce the size of the transformers dramatically - which also increases efficiency by decreasing core losses, winding losses and losses from heat [winding resistance, core`s reluctance, etc. ].



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