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公开(公告)号：US11870342B2
公开(公告)日：2024-01-09
申请号：US17456888
申请日：2021-11-30
Applicant: Delta Electronics (Shanghai) Co., Ltd.
Inventor： Hui Huang , Kun-Peng Wang , Shuai-Lin Du , Wei-Ke Yao , Feng Yao , Kai Dong , Jin-Fa Zhang
CPC classification number: H02M3/01 , H02M1/0096 , H02M1/0058 , H02M3/33576
Abstract: A resonant converter includes primary and secondary circuits, a transformer, a resonant network and a control circuit. The control circuit is coupled to the primary circuit and the secondary circuit, and configured to control primary switches of the primary circuit operating with a switching frequency. At least one of primary switches is configured to be turned on from a first switching moment until a second switching moment. The control circuit is configured to control secondary switches of the secondary circuit, such that at least one of secondary switches is turned on during a first time interval to increase a current of the resonant network in a first flowing direction and an output current in a second flowing direction or equal to zero.
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公开(公告)号：US11342834B2
公开(公告)日：2022-05-24
申请号：US17199472
申请日：2021-03-12
Applicant: Delta Electronics (Shanghai) Co., Ltd.
Inventor： Kai Dong , Lin Wang , Shuailin Du , Junhao Ji , Hui Huang
Abstract: The present disclosure provides a control method for an AC-DC conversion circuit. The method includes: calculating working information of an AC-DC conversion circuit according to at least one circuit parameter information of an input voltage, an input current, an output voltage, and an output current of the AC-DC conversion circuit; comparing the working information of the AC-DC conversion circuit with a preset working range to obtain an actual switching frequency or an actual switching period of the AC-DC conversion circuit. The AC-DC conversion circuit can meet requirements of Total Harmonic Distortion (THD), Power Factor (PF), efficiency and Electromagnetic Interference (EMI) and the like by adjusting the working information of the AC-DC conversion circuit through the preset working range.
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公开(公告)号：US11588398B1
公开(公告)日：2023-02-21
申请号：US17538421
申请日：2021-11-30
Applicant: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
Inventor： Hui Huang , Laszlo Huber , Kun-Peng Wang , Shuai-Lin Du , Kai Dong , Peter Mantovanelli Barbosa , Jin-Fa Zhang
Abstract: A resonant converter includes a transformer, a resonant network, control circuit, primary and secondary circuits. One of the primary switches is turned on from a first switching moment until a second switching moment. The resonant network is coupled between the primary circuit and the primary winding. A current of the resonant network changes a direction at a first moment between the first and second switching moments. The secondary circuit is coupled to the secondary winding. One of the secondary switches is turned on during first and second preset time interval to increase the current in a direction by the secondary winding being clamped by a preset voltage, in which the output current is increased in an opposite direction or equal to zero.
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公开(公告)号：US11569731B2
公开(公告)日：2023-01-31
申请号：US17659178
申请日：2022-04-14
Applicant: Delta Electronics (Shanghai) Co., Ltd.
Inventor： Kai Dong , Lin Wang , Shuailin Du , Junhao Ji , Hui Huang
Abstract: The present disclosure provides a control method for an AC-DC conversion circuit. The method includes: in an entire load range, acquiring circuit parameter information of the AC-DC conversion circuit; limiting an actual switching frequency or an actual switching period of the AC-DC conversion circuit within a preset working range according to the circuit parameter information. The AC-DC conversion circuit can meet requirements of Total Harmonic Distortion (THD), Power Factor (PF), efficiency and Electromagnetic Interference (EMI) and the like by adjusting the working information of the AC-DC conversion circuit through the preset working range.
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