Protection circuit for magnetically controlled d-c to d-c...

Details Protection circuit for magnetically controlled d-c to d-c... Protection circuit for magnetically controlled d-c to d-c...

H - Electricity

02

M

321/29, 321/31

H02M 1/08 (2006.01) H02M 3/335 (2006.01) H02P 13/26 (1980.01)

Patent

CA 1038031

PROTECTION CIRCUIT FOR MAGNETICALLY CONTROLLED D-C TO D-C CONVERTER Abstract of the Disclosure A pulse-width modulated d-c to d-c converter comprising a power switching circuit including a pair of switching transistors. In addition, a drive circuit is coupled to the input of the switching transistors via a coupling transformer for applying drive signals thereto, the coupling transformer including a secondary having a larger winding and a smaller winding connected in series opposition to the input to each of said power transistors with each larger winding being coupled through a diode to a separate one of said gate windings. The circuit provides stable operation by utilizing separate control windings in the magnetic amplifier for the voltage regulation and the over-current protection. In addition, symmetry control of the switching elements may be integrated with the voltage regulation by the addition of auxiliary control windings to the magnetic amplifier. - i -

249348

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