Direct current voltage converter with soft switching
First Claim
1. Continuous voltage converter with soft switching, comprising a transformer (Np, Ns) whose primary is particularly of the type with a half-bridge mounting and is adapted to be connected to a source of input voltage (Ve) by means of two electronic switches (INT1, INT2) and of which the secondary, of mono-alternating type, is adapted to be connected to a load by means of a series inductance (L2) and means (1 to 3, G1, G2) to control alternatingly the two switches, at fixed frequency, according to a regulation by modulation of pulse width as a function of the outlet voltage (Vo), thereby to provide for said primary a commutation at zero voltage, said converter being characterized in that said secondary comprises moreover a resonant circuit (L1, C1) without free-wheel diode so as to carry out in said secondary a quasi-resonant switching at zero current.
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Abstract
The invention relates to a continuous voltage converter with soft switching, comprising a transformer (Np, Ns) whose primary is particularly of the type with a half-bridge mounting and is adapted to be connected to a source of input voltage (Ve) by means of two electronic switches (INT1, INT2) and whose secondary, of the mono-alternating type, is adapted to be connected to a load by means of an inductance in series (L2) and means (1 to 3, G1, G2) to control alternatingly the two switches, at fixed frequency, according to a regulation by modification of the pulse width as a function of the output voltage (Vo), so as to provide to said primary a switching at zero voltage, said converter being characterized in that said secondary comprises moreover a resonant circuit (L1, C1) so as to provide for said secondary a quasi-resonant switching at zero current.
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4 Claims
- 1. Continuous voltage converter with soft switching, comprising a transformer (Np, Ns) whose primary is particularly of the type with a half-bridge mounting and is adapted to be connected to a source of input voltage (Ve) by means of two electronic switches (INT1, INT2) and of which the secondary, of mono-alternating type, is adapted to be connected to a load by means of a series inductance (L2) and means (1 to 3, G1, G2) to control alternatingly the two switches, at fixed frequency, according to a regulation by modulation of pulse width as a function of the outlet voltage (Vo), thereby to provide for said primary a commutation at zero voltage, said converter being characterized in that said secondary comprises moreover a resonant circuit (L1, C1) without free-wheel diode so as to carry out in said secondary a quasi-resonant switching at zero current.
Specification