公开(公告)号：US20200321878A1

公开(公告)日：2020-10-08

申请号：US16904735

申请日：2020-06-18

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yanzhong ZHANG ,  Zheng MA ,  Boning HUANG ,  Grover Victor TORRICO-BASCOPÉ ,  Dianbo FU

IPC: H02M3/335 ,  H02M7/483 ,  H02M1/08

Abstract: A resonant converter circuit comprises a multi-level inverter circuit placed before a resonant unit, and the multi-level inverter circuit can reduce a voltage to be input to the resonant unit. The reduced input voltage of the resonant unit results in a drop in an output voltage of the entire resonant converter circuit. In this process, the final output voltage is adjusted by adjusting the input voltage of the resonant unit, with no need to substantially adjust a switching frequency of the resonant converter circuit.

公开(公告)号：US20200321879A1

公开(公告)日：2020-10-08

申请号：US16911023

申请日：2020-06-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yanzhong ZHANG ,  Zheng MA ,  Lei SHI ,  Dianbo FU

IPC: H02M3/335 ,  H02M3/338 ,  H02M1/08

Abstract: A resonant converter includes: an input power supply, a bleeder circuit, a multi-level switching network, a resonant unit, and a transformer. The input power supply is connected to the bleeder circuit, the multi-level switching network is connected to the bleeder circuit, a clamping middle point of the multi-level switching network is connected to a middle point of the bleeder circuit; one end of the resonant unit is connected to the output terminal of the multi-level switching network, and the other end of the resonant unit is connected to one end of a primary side of the transformer; and the multi-level switching network instructs the output terminal of the multi-level switching network to output a square wave voltage with different amplitudes, to serve as an input voltage of the resonant unit, where the input voltage is used to adjust a gain of the resonant converter.