초록 ▼

A nondissipative circuit for automatic load sharing in parallel converter modules having push-pull power transistors, each transistor having a separate current-sensing transformer and an impedance-adjusting transformer in series with its collector. The impedance-adjusting transformer functions as a

A nondissipative circuit for automatic load sharing in parallel converter modules having push-pull power transistors, each transistor having a separate current-sensing transformer and an impedance-adjusting transformer in series with its collector. The impedance-adjusting transformer functions as a current-controlled variable impedance that is responsive to the difference between the peak collector current of the transistor and the average peak current of all collector currents of power transistors in all modules, thereby to control the collector currents of all power transistors with reference to the average peak collector current.

대표청구항 ▼

A circuit for automatic load sharing among parallel-connected converter modules, each module having push-pull connected power transistors, and each transistor having a separate current-sensing transformer and an impedance-adjusting transformer with their primary windings connected in series with the

A circuit for automatic load sharing among parallel-connected converter modules, each module having push-pull connected power transistors, and each transistor having a separate current-sensing transformer and an impedance-adjusting transformer with their primary windings connected in series with the collector of the transistor, said impedance-adjusting transformer having its primary winding functioning as a current-controlled variable impedance responsive to a current in the secondary winding that is proportional to the difference between the peak collector current of the transistor and the average peak current of all collector currents of power transistors in all modules, said circuit including means connected to the secondary winding of said current-sensing transformer for detecting said peak collector current, means connected to all peak detecting means for producing said average peak current of all peak collector currents, means responsive to the difference between the peak collector current of a particular power transistor and said average peak current for producing an error signal proportional to said difference, and means responsive to said error signal for controlling current through the secondary winding of the impedance-adjusting transformer connected in series with the collector of said particular power transistor, thereby to control the collector currents of all power transistors with reference to the average peak collector current.