Power converter

Abstract

The invention discloses a power converter includes at least one resonance converter circuit; said resonance converter circuit includes main bridge (110) which is connected with input signal (Vin); resonance network (120), one end is connected with the main bridge (110), the other end is connected with the commutating circuit (130); said resonance network (120) includes resonance capacitance (Cm3),the first resonance transformer (T1) and the second resonance transformer (T2), the first resonance transformer (T1) and the second resonance transformer (T2) are in series and then in series with the resonance capacitance (Cm3), then one end is connected with the middle point of the main bridge (110), the other end is connected with the input signal, the middle point of said first resonance transformer (T1) and the second resonance transformer (T2) are connected with the negative end of the output signal (Vout). Two magnetic components of the resonance network in the invention possess function of transferring energy to the secondary border, at the same time the transformer does not need the secondary border winding with central wrapping, the design and production of transformer are moreconveniently.

Description

technical field [0001] The invention relates to the technical field of DC conversion, in particular to a power converter. Background technique [0002] A resonant converter usually includes two input terminals for applying the input voltage; two output terminals for providing the output voltage; and a resonant tank circuit which can be connected to the input voltage in accordance with its resonant frequency. The coil of the resonant tank circuit is inductively coupled to another coil which is connected to the two outlets via a rectifier circuit. [0003] like figure 1 Shown is a resonant converter with a half-bridge structure. Two main switches S1 and S2 form a half-bridge structure. The driving signal is a complementary signal with a fixed 50% duty cycle. The inductor Lr, the capacitor Cr, and the magnetizing inductance Lm of the transformer T1 form a resonant network. The resonant network is connected between the midpoint of the half bridge and the ground, so the resona...

AI Technical Summary

Problems solved by technology

However, the resonant inductor does not transfer energy to the secondary side, and the work of transferring energy to the secondary side is only done by the transformer, that is to say, only one of the two magnetic components in the resonant network has the function of transferring energy to the secondary side

The secondary side of the transformer T1 is two center-tapped windings. The design and production of the transformer are more complicated than the transformer with a single winding on the secondary side.

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