METHOD FOR REVERSE PULSED CONVERSION OF DC VOLTAGE Russian patent published in 1999 - IPC

FIELD: electrical engineering; DC-to-DC voltage conversion. SUBSTANCE: during first phase of periodic process cycle, transformer magnetic energy and first capacitor energy increase as transformer is connected to power supply through closed control switch and first capacitor while energy of second capacitor connected to transformer by means of closed control switch decreases; during second phase of cycle, dose of magnetic energy of transformer obtained during first phase, second dose of energy of power supply and some portion of first capacitor energy are conveyed to load and increase energy of second capacitor with control switch held open and transformer connected by means of closed transmitting switch to power supply through second capacitor and to first capacitor. Newly introduced are definite switching delay circuits for controlling alternate change-over of semiconductor devices of switches; switching paths of these semiconductor devices are formed by connecting capacitors to them; in addition, half-cycle of capacitance loop fluctuations of first and second capacitors as well as of transformer inductances is set to be lower than that of second phase of cycle. Output energy of power supply is consumed during both phases of period; energies of transformer, first and second capacitors vary from their mean values and voltages across open control and transmitting switches do not exceed supply voltage and have spike-free flat-top trapezoidal waveform. EFFECT: improved safety of semiconductor device path and provision for obtaining several finely matched output channels. 2 cl, 2 dwg