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公开(公告)号：US11877426B2
公开(公告)日：2024-01-16
申请号：US17576399
申请日：2022-01-14
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhisheng Lian , Yongqi Qiu
CPC classification number: H05K7/20572 , H05K5/0213 , H05K5/03 , H05K7/20145 , H05K7/20172
Abstract: A temperature control cabinet includes at least one cabinet unit. Each cabinet unit includes: a subrack, where there is a placement space for placing a device inside the subrack, and there is at least one opening at a periphery of the cabinet; and a cabinet door mounted on the subrack and configured to buckle the opening, where at least two temperature control components are disposed on the cabinet door, the temperature control components are arranged in a first direction, the first direction is a direction from the top to the bottom of the subrack, each temperature control component is provided with an air exhaust vent and an air return vent, the air return vent of each temperature control component communicates with a hot area at the top of the placement space, and the air exhaust vent of each temperature control component communicates with the placement space.
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公开(公告)号：US20240014733A1
公开(公告)日：2024-01-11
申请号：US18347040
申请日：2023-07-05
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Ken CHIN , Shanglin MO , Shuaibing WANG
CPC classification number: H02M1/4266 , H02M1/0009 , H02M1/0058 , H02M1/4233
Abstract: A method for controlling a totem-pole PFC circuit. When an alternating current of an input end of a totem-pole PFC circuit is in a positive half period, if a previous switching period is less than specified duration, after charging of a PFC inductor is completed, a switch that enables the PFC inductor to be discharged is first delayed for specified threshold duration, and then the switch that enables the PFC inductor to be discharged is turned on, so that the switch that enables the PFC inductor to be discharged is turned on only once. In an existing PFC application, when an input voltage is in a positive half period, a switch that enables a PFC inductor to be discharged needs to be turned on twice.
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公开(公告)号：US20240014459A1
公开(公告)日：2024-01-11
申请号：US18469802
申请日：2023-09-19
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhipeng WU , Hui MA
IPC: H01M10/617 , H01M10/48 , H01M10/652
CPC classification number: H01M10/617 , H01M10/486 , H01M10/482 , H01M10/652 , H01M2200/105 , H01M2010/4271
Abstract: An energy storage system, a battery monitoring method, and an energy storage device, to improve precision and stability of the energy storage system. The system includes: a battery module, a temperature sensor, and a battery monitoring unit. The battery module includes at least two battery areas. The temperature sensor is disposed in each battery area. The battery monitoring unit determines, based on a plurality of temperature signals sent by temperature sensors, a first battery area corresponding to an abnormal temperature signal that reaches a first preset temperature threshold. When an adjacent temperature signal of a second battery area that is connected to the first battery area is greater than a second preset temperature threshold, rated power of the battery module is reduced.
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公开(公告)号：US20240001776A1
公开(公告)日：2024-01-04
申请号：US18361652
申请日：2023-07-28
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Chaojie Shi , Chaoqiang Wu , Shankai Chen
CPC classification number: B60L50/51 , H02P27/06 , B60L2210/42 , B60L15/007 , H02P21/22
Abstract: This application discloses a motor control unit, a power train, a control method, and an electric vehicle, and relates to the field of electric vehicle technologies. An input end of the motor control unit connects to a power battery pack, an output end of the motor control unit connects to three phases of motor windings of a motor, and the motor control unit includes an inverter circuit and a controller. The controller is configured to control the inverter circuit to simultaneously output currents to the three phases of motor windings, and control the currents input to all the phases of motor windings to sequentially reach a preset current.
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公开(公告)号：US11859917B2
公开(公告)日：2024-01-02
申请号：US17710481
申请日：2022-03-31
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Jun Chen , Xiaowei Hui , Zhisheng Lian
CPC classification number: F28D7/16 , H04Q1/035 , H04Q2201/808
Abstract: A heat exchanger includes a vapor collection pipe, a liquid collection pipe, and an exchange pipeline. The exchange pipeline includes a condensing section, an evaporation section, and a transition section. An upper end of the condensing section is connected to the vapor collection pipe. A lower end of the condensing section is connected to a first end of the transition section. An upper end of the evaporation section is connected to a second end of the transition section. A lower end of the evaporation section is connected to the liquid collection pipe. The evaporation section and the condensing section respectively extend in directions opposite to each other.
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Patent Agency Ranking
公开(公告)号：US11852671B2
公开(公告)日：2023-12-26
申请号：US17707436
申请日：2022-03-29
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhong Wang , Shengjie Zhang , Jianshan Li , Yu Peng , Shijiang Yu , He Zhou , Bo Yu
CPC classification number: G01R31/14 , G01R31/52 , H02J3/381 , H02J2300/24
Abstract: A photovoltaic energy system and a method for detecting a ground insulation impedance, improve accuracy of detecting a ground insulation impedance after one or more conversion circuits are connected in parallel. The photovoltaic energy system includes one or more conversion circuits and a detection circuit. The detection circuit includes an alternating current signal source and a sampling resistor that are connected in series, a first sampling circuit, and a control circuit. The control circuit is configured to control the alternating current signal source to output harmonic signals of a first frequency and a second frequency. The first sampling circuit is configured to: when the alternating current signal source outputs the harmonic signal of the first frequency, collect a voltage at both terminals of the sampling resistor to obtain a first voltage.
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公开(公告)号：US20230402941A1
公开(公告)日：2023-12-14
申请号：US18454581
申请日：2023-08-23
Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Inventor： Xinyu YU , Kai XIN , Haibin GUO , Fuqiang XU
IPC: H02M7/5388 , H02M1/12 , H02M1/14 , H02M7/483
CPC classification number: H02M7/5388 , H02M1/12 , H02M1/14 , H02M7/483
Abstract: This application discloses a common-mode voltage adjustment method and apparatus, and a control system, and relates to the field of electronic technologies. In an example method, a controller generates an injection instruction of a first common-mode voltage based on a first modulation scheme, generates an injection instruction of a second common-mode voltage based on a second modulation scheme, and generates an injection instruction of a third common-mode voltage based on the injection instruction of the first common-mode voltage and the injection instruction of the second common-mode voltage during a modulation scheme switching period. The injection instruction of the third common-mode voltage may be used to control a inverter circuit to output the third common-mode voltage.
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公开(公告)号：US20230400520A1
公开(公告)日：2023-12-14
申请号：US18447043
申请日：2023-08-09
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Lin Li , Zhipeng Wu
IPC: G01R31/3835 , G01R31/396 , H02J7/00
CPC classification number: G01R31/3835 , G01R31/396 , H02J7/0013 , H02J7/0048
Abstract: This application provides an energy storage system and an energy storage system detection method. The method includes: A first control unit sends a first instruction to a first battery cluster to change an output voltage of the first battery cluster. The first control unit obtains a first input voltage and a second input voltage that are of each of a plurality of power conversion units. The first control unit determines, based on the first instruction, and the first input voltage and the second input voltage that are of each of the plurality of power conversion units, whether each of the plurality of power conversion units is connected to the first battery cluster. On this basis, whether there is a connection error in the energy storage system is determined. Then, a security risk in the system is eliminated.
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公开(公告)号：US11843318B2
公开(公告)日：2023-12-12
申请号：US17668238
申请日：2022-02-09
Applicant: Huawei Digital Power Technologies Co., Ltd.
CPC classification number: H02M3/33571 , H02M1/38 , H02M3/01
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：US20230396068A1
公开(公告)日：2023-12-07
申请号：US18453678
申请日：2023-08-22
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Lin Li , Zhiwu Xu , Haibin Guo
CPC classification number: H02J3/38 , H02J3/32 , H02J2300/26
Abstract: A power conversion module includes a power transistor and a sampling control unit. The sampling control unit determines a given duty cycle of the power conversion module based on the bus reference duty cycle, the power supply reference duty cycle, and the current limiting reference duty cycle, and controls, based on the given duty cycle, the power transistor to work, to control the direct current bus to have a target bus voltage and enable the power conversion module to run at the maximum power point. In this application, the direct current bus can be stabilized and the power conversion module can be controlled to run at the maximum power point.
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