Direct current voltage converter with soft switching

Details Direct current voltage converter with soft switching Direct current voltage converter with soft switching

H - Electricity

02

M

H02M 3/38 (2006.01) H02M 3/337 (2006.01)

Patent

CA 2227966

The invention relates to a direct current voltage converter with soft switching, comprising a transformer (Np, Ns) of which the primary is particularly of the half-bridge mount type and susceptible of being connected to an input voltage source (Ve) through two electronic switches (INT1, INT2) and of which the secondary, of the monoalternating type, is susceptible of being connected to a load through a series inductance (L2) and means (1-3, G1, G2) to alternatingly control the two switches, at fixed frequency, according to a regulation through pulse width modulation as a function of the output voltage (Vo) so as to achieve at the primary a zero voltage switching, said converter being characterized in that said secondary comprises, additionally, a resonant circuit (L1, C1) so as to perform at said secondary a zero current quasi-resonant switching.

L'invention concerne un convertisseur de tension continue à commutation douce, comprenant un transformateur (Np, Ns) dont le primaire est notamment du type à montage en demi-pont et susceptible d'être relié à une source de tension d'entrée (Ve) par l'intermédiaire de deux interrupteurs électroniques (INT1, INT2) et dont le secondaire, de type mono-alternance, est susceptible d'être relié à une charge par l'intermédiaire d'une inductance en série (L2) et des moyens (1 à 3, G1, G2) pour commander en alternance les deux interrupteurs, à fréquence fixe, suivant une régulation par modulation de largeur d'impulsion en fonction de la tension de sortie (Vo), en sorte de réaliser audit primaire une commutation à zéro de tension, ledit convertisseur étant caractérisé en ce que ledit secondaire comporte, en outre, un circuit résonnant (L1, C1) en sorte de réaliser audit secondaire une commutation quasi-résonnante à zéro de courant.

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