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公开(公告)号：US20230033111A1
公开(公告)日：2023-02-02
申请号：US17877360
申请日：2022-07-29
Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Inventor： Gun YANG
Abstract: Embodiments of this application disclose a converter, applied to the field of power supply technologies, and including a direct current power supply, a first switching transistor, a second switching transistor, a resonant capacitor, a transformer, a secondary-side circuit, and a control circuit. The secondary-side circuit is connected to a secondary-side winding of the transformer, and includes a rectifier diode and a parasitic diode corresponding to the rectifier diode. The direct current power supply, the first switching transistor, and the second switching transistor are connected in series, the resonant capacitor and a primary-side winding of the transformer are connected in series, and a loop formed in series is connected in parallel at two sides of the first switching transistor. The control circuit controls the first switching transistor and the second switching transistor to be turned on or off.
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公开(公告)号：US20230006544A1
公开(公告)日：2023-01-05
申请号：US17856719
申请日：2022-07-01
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Gun YANG , Shengyong DAI
Abstract: The converter includes: an input direct current (DC) power supply, a main power transistor, an auxiliary power transistor, a first capacitor, a transformer, and a controller. The first capacitor is connected in series to the transformer to form a series circuit. The series circuit is connected in parallel to the auxiliary power transistor. A source of the main power transistor is connected to a drain of the auxiliary power transistor. A source of the auxiliary power transistor is connected to another electrode of the input DC power supply. An input negative electrode of the input DC power supply is grounded. The controller is configured to: monitor a value of a current on the transformer to obtain a quantity of times that the value of the current on the transformer reaches a specified current threshold.
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Patent Agency Ranking
公开(公告)号：US20250098082A1
公开(公告)日：2025-03-20
申请号：US18885907
申请日：2024-09-16
Applicant: Huawei Digital Power Technologies Co, Ltd.
Inventor： Yang YAN , Weijia YAN , Zhaoqi CAI , Gun YANG , Yiyang HE
Abstract: A power generation system, a power converter, and a switch assembly. The plurality of positive input ports and the plurality of negative input ports are configured to electrically connect the switch assembly to an external direct current source, and the switch assembly is electrically connected to the power device through a trace on the circuit mainboard. The switch assembly includes a plurality of first pins and a plurality of second pins, the plurality of first pins are located in a first region, the plurality of second pins are located in a second region, the first region and the second region are stacked in a first direction. The controller is configured to send a switch-off signal to the switch assembly when the external direct current source or the power device is faulty. The power converter provided can resolve a problem of a short circuit occurring during condensation.
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公开(公告)号：US20220255455A1
公开(公告)日：2022-08-11
申请号：US17668238
申请日：2022-02-09
Applicant: Huawei Digital Power Technologies Co., Ltd.
Abstract: This application discloses a converter and a power adapter, to reduce an energy loss of the power adapter. The converter includes: a DC power supply, a primary power transistor, an auxiliary power transistor, a first capacitor, a transformer, and a control circuit. The first capacitor is connected in series to the transformer to form a series circuit, the series circuit is connected in parallel to a first terminal and a second terminal of the auxiliary power transistor. The control circuit is configured to: when an excitation current in the transformer is in a continuous state, regulate a target voltage to a preset voltage threshold, and control the primary power transistor to be turned on when first dead time ends, where the target voltage is a voltage between the first terminal of the primary power transistor and the ground.
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公开(公告)号：US20240063712A1
公开(公告)日：2024-02-22
申请号：US18450534
申请日：2023-08-16
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Gun YANG , Dehong CHEN , Zhengang SONG , Jianguo BI
CPC classification number: H02M1/44 , H02M1/0064 , H01F3/14 , H02M1/123
Abstract: An inverter includes a direct current-alternating current (DC-AC) conversion circuit and a filter circuit, where the filter circuit is connected to an alternating current side of the DC-AC conversion circuit. The filter circuit includes an integrated inductor. The integrated inductor includes a common mode magnetic core, a differential mode magnetic core, and at least two windings. The differential mode magnetic core includes a second magnetic core and a third magnetic core. The common mode magnetic core, the second magnetic core, and the third magnetic core are stacked in sequence. Each winding is located between the third magnetic core and the second magnetic core and is wound on the common mode magnetic core and the second magnetic core. The at least two windings are spaced by the third magnetic core. Set as such, a product volume can be reduced while common mode interference and differential mode interference are suppressed.
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公开(公告)号：US20220255444A1
公开(公告)日：2022-08-11
申请号：US17668991
申请日：2022-02-10
Applicant: Huawei Digital Power Technologies Co., Ltd.
Abstract: This application provides a controller and control system for a DC/DC converter. The DC/DC converter includes a first switching transistor, a second switching transistor, a first capacitor, and a transformer. The transformer includes an excitation inductor and a transformer leakage inductor. The controller controls the first switching transistor to turn on to form a first closed circuit, where a current in the excitation inductor increases in a first direction; when a preset time period expires, the controller controls the first switching transistor to turn off, so that a voltage at two ends of the second switching transistor decreases; and when the voltage at the two ends of the second switching transistor is a first preset voltage threshold, the controller controls the second switching transistor to turn on to form a second closed circuit. When embodiments of this application are implemented, a turn-on loss in the DC/DC converter can be reduced.
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公开(公告)号：US20230006561A1
公开(公告)日：2023-01-05
申请号：US17941030
申请日：2022-09-09
Applicant: Huawei Digital Power Technologies Co., Ltd.
Abstract: This application discloses a converter and a power adapter, to reduce an energy loss of the power adapter. The converter includes a direct current power supply, a main power transistor, an auxiliary power transistor, a first capacitor, a transformer, and a control circuit. The first capacitor and the transformer are connected in series to form a series circuit. The series circuit is connected to a first terminal and a second terminal of the auxiliary power transistor in parallel. The control circuit is configured to: when the main power transistor is in a cutoff state and a target voltage reaches a target valley voltage, control the main power transistor to be conducted. The target voltage is a voltage between the first terminal of the main power transistor and the ground.
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