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公开(公告)号：US20220224271A1
公开(公告)日：2022-07-14
申请号：US17710726
申请日：2022-03-31
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhaoxue CUI , Wei ZHANG , Ningbo FENG
Abstract: This application provides an energy conversion apparatus, a motor, a power system, and a vehicle. The energy conversion apparatus may integrate a motor drive function by using a three-phase bridge arm converter and a motor winding, and integrate an alternating current charging function by using a two-phase two-bridge-arm converter and a transformer. In this way, the energy conversion apparatus can integrate the charging function and the motor drive function. When the energy conversion apparatus is installed on an electric vehicle, a vehicle integration level can be increased, a structure layout of the electric vehicle can be simplified, and costs and a volume of the electric vehicle can be reduced.
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公开(公告)号：US20220217866A1
公开(公告)日：2022-07-07
申请号：US17704996
申请日：2022-03-25
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Hao WU , Jun CHEN , Yongwang XIAO , Jun LI
Abstract: A wireless charging base is provided, and is mainly applied to electronic devices such as a mobile phone and a tablet computer. The wireless charging base includes a charging panel, configured to charge the electronic device. The charging panel includes a first air vent and a second air vent. A first base plate is disposed on an upper surface of the charging panel, is located at an end of the charging panel, and is configured to support the electronic device when the electronic device is being charged. The first base plate includes a third air vent. A second base plate is disposed on the lower surface of the charging panel, is located at the same end as the first base plate, and is configured to support the charging panel. The second base plate includes a fourth air vent.
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公开(公告)号：US20220216772A1
公开(公告)日：2022-07-07
申请号：US17645152
申请日：2021-12-20
Applicant: Huawei Digital Power Technologies Co., Ltd.
Abstract: Embodiments of this application provide a motor rotor, a motor, and a vehicle. A conductive pillar passes through an inner ring of a conductive bearing, an outer wall of the conductive pillar interference fits with the inner ring of the conductive bearing, and an end of the conductive pillar is grounded. In this way, it is ensured that a shaft current on a rotor body is discharged by using the conductive bearing and the conductive pillar, to prevent a main bearing of the motor rotor from being electrically corroded by the shaft current. In addition, the conductive bearing is sleeved on the grounded conductive pillar, so that the inner ring of the conductive bearing can interference fit with the outer wall of the conductive pillar.
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公开(公告)号：US20220216723A1
公开(公告)日：2022-07-07
申请号：US17579935
申请日：2022-01-20
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Xueliang ZHANG , Yang CHENG
Abstract: This application provides a charging system and an electric vehicle. The charging system includes a motor control unit (MCU) and a first inductor. A first bridge arm in the MCU and the first inductor constitute a voltage conversion circuit. When a power supply voltage is less than a minimum charging voltage of a power battery, the MCU may perform boost conversion on the power supply voltage by using the voltage conversion circuit, and output the power supply voltage obtained after boost conversion to the power battery as a first output voltage, where the first output voltage is not less than the minimum charging voltage. In this application, space occupied by the charging system and costs of the charging system can be reduced while the charging system is used to perform boost conversion on the power supply voltage.
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公开(公告)号：US20220209616A1
公开(公告)日：2022-06-30
申请号：US17457390
申请日：2021-12-02
Applicant: Huawei Digital Power Technologies Co., Ltd.
IPC: H02K5/173 , F16C19/06 , F16C35/077
Abstract: This application describes a motor that includes a housing, an output shaft, a conductive bearing, and a conductive component. The output shaft is disposed in the housing. A positioning hole is disposed on an end face of a first end of the output shaft, and the positioning hole is disposed coaxially with the output shaft. The conductive bearing is disposed in the positioning hole, and includes an inner ring, and an outer ring that is fixedly connected to the output shaft. One end of the conductive component is fixedly connected to the inner ring of the conductive bearing, and the other end is connected to the housing. In this application, the motor can output, by using the conductive bearing and the conductive component, charges accumulated in the output shaft, to eliminate a generated common-mode voltage.
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Patent Agency Ranking
公开(公告)号：US20220199585A1
公开(公告)日：2022-06-23
申请号：US17693014
申请日：2022-03-11
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Dong CHEN , Lei SHI , Zhaohui WANG
Abstract: This application provides a diode discrete device, a circuit with a bypass function, and a converter. The diode discrete device is used in a circuit with a bypass function, and the diode discrete device includes a discrete device package, a first diode, and a second diode. The first diode is a main circuit diode, the second diode is a bypass diode, first performance of the first diode is better than first performance of the second diode, and the first performance includes a reverse recovery charge and reverse recovery time. The first diode and the second diode are packaged into the discrete device package, and an anode of the first diode is connected to an anode of the second diode, or a cathode of the first diode is connected to a cathode of the second diode. The diode discrete device can improve integration and power density of the circuit.
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217.发明申请公开(公告)号：US20220181964A1
公开(公告)日：2022-06-09
申请号：US17544690
申请日：2021-12-07
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhuyong HUANG , Xiaofei ZHANG , Peng SHUAI , Peiguo LIU
Abstract: Embodiments of this application provide a power conversion circuit. The power conversion circuit includes at least one first power conversion unit connected in series to a first phase line, at least one second power conversion unit connected in series to a second phase line, at least one third power conversion unit connected in series to a third phase line, a plurality of first start circuits connected in series to the first phase line, and a plurality of second start circuits connected in series to the second phase line. Each first start circuit includes a first relay and a first resistor that are connected in parallel, and first relays in all the first start circuits are sequentially closed after the power conversion circuit is powered on, to start the power conversion circuit. Each second start circuit includes a second relay and a second resistor that are connected in parallel.
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公开(公告)号：US11356034B2
公开(公告)日：2022-06-07
申请号：US17088088
申请日：2020-11-03
Applicant: Huawei Digital Power Technologies Co., Ltd.
IPC: H02M7/487 , G01R19/175 , H02M1/38 , H02M7/5387 , H02M1/00
Abstract: Embodiments of the present application disclose a multi-level inverter clamping modulation method and apparatus, and an inverter. Switching elements of an inverter are controlled when an output voltage of the inverter crosses zero, and switching elements in each inverter bridge arm of an active clamp multi-level inverter include an internal tube, an external tube, and a clamping tube. The internal tube and the external tube are connected in series between a positive bus and a negative bus, the clamping tube is connected between a common terminal of the internal tube and the external tube and a bus, the internal tube is a low-frequency switching element, and the external tube and the clamping tube are high-frequency switching elements.
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公开(公告)号：US20220166313A1
公开(公告)日：2022-05-26
申请号：US17670592
申请日：2022-02-14
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Jun WANG , Houjian XU , Tiansan LIN , Fangpo ZHANG
Abstract: A direct current-direct current conversion circuit includes: an input inductor, a first capacitor, a second capacitor, a flying capacitor, a first switch, a second switch, a first inductor, a first diode, a first buffer circuit, a third switch, a fourth switch, a second inductor, a second diode, and a second buffer circuit. A power supply, the input inductor, the first diode, the second diode, the first capacitor, and the second capacitor are sequentially connected in series. A first terminal of the flying capacitor is connected between the first diode and the second diode. A second terminal of the flying capacitor is connected between the first switch and the third switch, and the second terminal of the flying capacitor is further connected between the second switch and the second inductor.
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公开(公告)号：US11342843B2
公开(公告)日：2022-05-24
申请号：US16825789
申请日：2020-03-20
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Dianbo Fu , Heping Dai
Abstract: An apparatus includes comprises an auxiliary switch, a transformer and an auxiliary diode. The auxiliary switch is configured to be turned on prior to turning on a first power switch of a multi-level boost converter. The transformer has a primary winding connected between the first power switch and the auxiliary switch. The auxiliary diode is coupled between a secondary winding of the transformer and an output terminal of the multi-level boost converter. The transformer and the auxiliary switch are configured such that the first power switch is of zero voltage switching, and the auxiliary switch is of zero current switching.
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