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公开(公告)号：US11515709B2
公开(公告)日：2022-11-29
申请号：US16889520
申请日：2020-06-01
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Xiaolin Mao , Heping Dai , Dianbo Fu , Huibin Zhu
Abstract: System, device and method for exporting power are provided including at least one AC optimizer with plurality of DC inputs each connecting with respective one of plurality of DC sources, and independent maximum power point tracking (MPPT) performed for each respective DC source to extract power from each DC source for output and coupling to AC grid. When multiple AC optimizers are employed, with each AC optimizer having multiple DC inputs, each DC input can be connected to PV module with independent MPPT function. Since, each AC optimizer can serve multiple PV modules, significant cost saving and efficiencies can be achieved. Optionally, on PV sub-module level, each of the multiple DC inputs can be used as an independent MPPT channel for a PV sub-module cell string.
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公开(公告)号：US11831236B2
公开(公告)日：2023-11-28
申请号：US17516325
申请日：2021-11-01
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Heping Dai , Dianbo Fu , Huibin Zhu
CPC classification number: H02M1/4208 , H02M3/155 , H02M7/217
Abstract: A bidirectional power conversion system includes three power conversion ports. A first power conversion port includes a power factor correction device and a primary power conversion network. A second power conversion port includes a plurality of switches and a plurality of diodes, wherein an output voltage of the second power conversion port is regulated through adjusting an output voltage of the power factor correction device as well as through adjusting an operating parameter of the primary power conversion network. A third power conversion port includes a first switch network and a power regulator connected in cascade, wherein the first power conversion port, the second power conversion port and the third power conversion port are magnetically coupled to each other through a transformer.
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公开(公告)号：US11742758B2
公开(公告)日：2023-08-29
申请号：US17664467
申请日：2022-05-23
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Dianbo Fu , Heping Dai
CPC classification number: H02M3/158 , H02M1/083 , H02M1/0058
Abstract: A multi-level converter includes a first blocking device, a second blocking device, a first switching element and a second switching element connected in series between an output terminal of the multi-level converter and ground, a first soft switching apparatus comprising a first auxiliary switch and a first transformer, wherein the first auxiliary switch and the first transformer are configured the first switching element is of zero voltage switching, and the first auxiliary switch is of zero current switching, and a second soft switching apparatus comprising a second auxiliary switch and a second transformer, wherein the second auxiliary switch and the second transformer are configured the second switching element is of zero voltage switching, and the second auxiliary switch is of zero current switching.
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公开(公告)号：US11990835B2
公开(公告)日：2024-05-21
申请号：US17473202
申请日：2021-09-13
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Dianbo Fu , Heping Dai
CPC classification number: H02M1/4216 , H02M1/4208 , H02M1/44 , H02M3/335 , H02M7/06 , H02M3/01 , H02M3/33573
Abstract: A power conversion system includes a first rectifier and a second rectifier. The first rectifier is configured to operate at a first operating frequency. The first rectifier is configured to be connected with a three-phase power source. A first amount of power flows through the first rectifier from the three-phase power source. The second rectifier is configured to operate at a second operating frequency. The second rectifier is configured to be connected in parallel with the first rectifier, and a second amount of power flows through the second rectifier from the three-phase power source. The second operating frequency is higher than the first operating frequency, and the second amount of power is a fraction of the first amount of power.
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公开(公告)号：US11824496B2
公开(公告)日：2023-11-21
申请号：US17651812
申请日：2022-02-21
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Heping Dai , Xiaolin Mao , Dianbo Fu , Huibin Zhu
CPC classification number: H02S50/10 , H02J3/38 , H02J3/381 , H02J3/388 , H02J3/46 , H02S50/00 , H02J2300/26
Abstract: A system includes a plurality of power modules connected in series between two input terminals of an inverter, a plurality of local controllers coupled to their respective power modules, wherein a first local controller of the plurality of local controllers is coupled to a first power module comprising a first solar panel, a first capacitor and a first power optimizer, and wherein the first local controller is configured to enable the first power optimizer to switch among a buck mode, a boost mode and a pass-through mode based upon a maximum power point tracking (MPPT) current of the first solar panel, and a central controller coupled to the inverter, wherein the central controller is configured to regulate an input voltage of the inverter.
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Patent Agency Ranking
公开(公告)号：US11780342B2
公开(公告)日：2023-10-10
申请号：US17707716
申请日：2022-03-29
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Dianbo Fu , Weiping Liu , Shaohua Wang
CPC classification number: B60L53/22 , H02M1/4225 , B60L2210/14 , B60L2210/30
Abstract: An on-board charging apparatus is provided to implement high-power charging. The on-board charging apparatus includes an alternating current (AC) to direct current (DC) conversion circuit (AC/DC conversion circuit), a power factor correction (PFC) circuit, and a DC/DC conversion circuit. An alternating current terminal of the AC/DC conversion circuit is connected to an alternating current terminal of the PFC circuit. The AC/DC conversion circuit is configured to: receive a first alternating current voltage at the alternating current terminal of the AC/DC conversion circuit, and convert a first component of the first alternating current voltage into a first direct current voltage. The PFC circuit is configured to: convert a second component of the first alternating current voltage into a second direct current voltage. The DC/DC conversion circuit is configured to: convert the first direct current voltage and the second direct current voltage into a third direct current voltage.
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公开(公告)号：US11695335B2
公开(公告)日：2023-07-04
申请号：US17188859
申请日：2021-03-01
Applicant: Huawei Digital Power Technologies Co., Ltd.
CPC classification number: H02M3/155 , H02M3/07 , H02M3/158 , H03K17/122 , H03K17/127 , H03K17/74 , H02M1/0051 , H02M1/0058 , H02M1/088 , H03K2017/307 , H03K2217/0036
Abstract: A method comprises configuring a power converter to operate as a boost converter, the power converter comprising a low side switch and a high side switch, during a first dead time after turning off the low side switch and before turning on the high side switch, configuring the power converter such that a current of the power converter flows through a high speed diode, and after turning on the high side switch, configuring the power converter such that the current of the power converter flows through a low forward voltage drop diode.
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公开(公告)号：US11587726B2
公开(公告)日：2023-02-21
申请号：US16200164
申请日：2018-11-26
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Dianbo Fu , Yunfeng Liu , Yanshen Hu
Abstract: A system comprises a first inverter and a second inverter connected in parallel, a coupled inductor connected to outputs of the first inverter and the second inverter, wherein the coupled inductor comprises a plurality of windings formed by a single winding wire and an output filter coupled to an output of the coupled inductor.
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公开(公告)号：US20220376513A1
公开(公告)日：2022-11-24
申请号：US17880497
申请日：2022-08-03
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Xiaolin Mao , Heping Dai , Huibin Zhu , Dianbo Fu
Abstract: A direct current (DC) bus voltage from a combined output of a plurality of DC power modules is controlled based on an alternating current (AC) voltage of a power grid. The DC bus voltage tracks the AC grid voltage to provide efficient conversion between the DC power sources and the AC grid, even when the amplitude of the AC grid voltage varies. In one example, a variable reference voltage is generated based on a detected AC grid voltage. The reference voltage increases and decreases in proportion to increases and decreases in the AC grid voltage. In this manner, large differences between the bus voltage and the grid voltage are avoided. By closely tracking the two voltages, efficiency in the modulation index for power conversion can be achieved.
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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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