公开(公告)号：US4351020A

公开(公告)日：1982-09-21

申请号：US247643

申请日：1981-03-26

申请人： Andrea Leti ,  Enrico Valacca

发明人： Andrea Leti ,  Enrico Valacca

IPC分类号： H02M3/338 ,  H02M7/538 ,  H02P13/20

CPC分类号： H02M3/3388 ,  H02M7/53806

摘要： Two power transistors operating in push-pull, connected in series with respective halves of a transformer primary across a d-c source, are alternately rendered conductive by driving pulses generated during fractions of corresponding half-cycles of a square-wave oscillator. Two integrating networks, connected across these primary halves or across resistors in series therewith, work into a comparator whose output signal, reflecting a dissymmetry between the transistor currents, unbalances the square-wave oscillator to vary the relative width of the two sets of driving pulses until the dissymmetry substantially disappears.

摘要翻译： 两个功率晶体管通过在方波波形的相应半周期的分数阶段内产生的脉冲交替地在d-c源上与主变压器的相应半部串联连接而进行推挽操作。 两个集成网络连接在这些主要半部分或与其串联的电阻器之间，可以工作在比较器中，其输出信号反映了晶体管电流之间的不对称性，使方波振荡器不平衡，以改变两组驱动脉冲的相对宽度 直到不对称基本消失。