D.c. voltage converter

Details D.c. voltage converter D.c. voltage converter

H - Electricity

02

M

321/29

H02M 3/335 (2006.01)

Patent

CA 1211502

ABSTRACT OF THE DISCLOSURE A d.c. voltage converter having alternating energy intake and energy discharge phases. The converter includes a power transformer having a core and at least primary, secondary and tertiary windings associated with the core. A primary circuit including a pulse width controlled semi- conductor switch connected in series with the primary winding conducts an energy intake current during the energy intake phase of the converter. A secondary circuit includ- ing a smoothing capacitor and at least one rectifier element connecting the smoothing capacitor to the secondary winding conducts an energy discharge current during the energy discharge phase on the converter. Circuitry is pro- vided for connecting the tertiary winding to the smoothing capacitor so that, following the energy discharge phase of the converter, excess energy of the smoothing capacitor in the form of an energy feedback current is fed back into the core until the start of the next energy intake phase of the converter. - 1 -

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