公开(公告)号：US10224827B1

公开(公告)日：2019-03-05

申请号：US16007750

申请日：2018-06-13

Applicant: Futurewei Technologies, Inc.

Inventor： Huibin Zhu ,  Xiaolin Mao ,  Heping Dai ,  Dianbo Fu

IPC: H02M3/335 ,  H02M1/088

Abstract: According to one aspect of the present disclosure, there is provided an apparatus that includes a first power converter stage connected to a first side of a first transformer, and a second power converter stage connected to a first side of a second transformer. The apparatus further includes an interleaved multi-bridge circuit connected to the second side of the first transformer and to the second side of the second transformer. The apparatus further includes a controller that is configured to operate the interleaved multi-bridge circuit in a parallel mode in which the second sides of the first and second transformers are in parallel at a DC terminal of the interleaved multi-bridge circuit and in a series mode in which the second sides of the first and second transformers are in series at the DC terminal.

公开(公告)号：US20180316191A1

公开(公告)日：2018-11-01

申请号：US15583456

申请日：2017-05-01

Applicant: Futurewei Technologies, Inc.

Inventor： Huibin Zhu ,  Heping Dai ,  Xiaolin Mao

IPC: H02J3/38

Abstract: An apparatus includes a plurality of photovoltaic modules including at least a first and a second photovoltaic module having outputs connected in series by a bus. A voltage detection circuit detects a bus voltage at an output of the bus, to provide an indicator of detected bus voltage to the first photovoltaic module, and to provide the indicator of detected bus voltage to the second photovoltaic module.

公开(公告)号：US20200176991A1

公开(公告)日：2020-06-04

申请号：US16780293

申请日：2020-02-03

Applicant: Futurewei Technologies, Inc.

Inventor： Heping Dai ,  Xiaolin Mao ,  Dianbo Fu ,  Huibin Zhu

IPC: H02J3/38 ,  H02S50/00 ,  H02S50/10

Abstract: An apparatus includes a four-switch power converter having input terminals coupled to a power source and output terminals coupled to a capacitor, wherein the capacitor is connected in series with the power source, and a common node of the capacitor and the power source is connected to one input terminal of the four-switch power converter.

公开(公告)号：US10673246B2

公开(公告)日：2020-06-02

申请号：US15829846

申请日：2017-12-01

Applicant: Futurewei Technologies, Inc.

Inventor： Xiaolin Mao ,  Heping Dai ,  Dianbo Fu ,  Huibin Zhu

IPC: H02J3/38 ,  G05F1/67 ,  H02M7/487 ,  H02M1/00 ,  H02M3/158 ,  H02M7/49 ,  H02M7/5387

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.

公开(公告)号：US20180331540A1

公开(公告)日：2018-11-15

申请号：US15594231

申请日：2017-05-12

Applicant: Futurewei Technologies, Inc.

Inventor： Xiaolin Mao ,  Heping Dai ,  Huibin Zhu ,  Dianbo Fu

IPC: H02J3/38 ,  H02M7/44 ,  H02J13/00 ,  H02M3/04 ,  H02M1/084

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.