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公开(公告)号：US10566908B2
公开(公告)日：2020-02-18
申请号：US16277080
申请日：2019-02-15
Applicant: Futurewei Technologies, Inc.
Inventor： Huibin Zhu , Xiaolin Mao , Heping Dai , Dianbo Fu
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.
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公开(公告)号：US10536002B2
公开(公告)日：2020-01-14
申请号：US15594231
申请日：2017-05-12
Applicant: Futurewei Technologies, Inc.
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：US20190252988A1
公开(公告)日：2019-08-15
申请号：US16277080
申请日：2019-02-15
Applicant: Futurewei Technologies, Inc.
Inventor： Huibin Zhu , Xiaolin Mao , Heping Dai , Dianbo Fu
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.
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公开(公告)号：US10284097B2
公开(公告)日：2019-05-07
申请号：US16173904
申请日：2018-10-29
Applicant: Futurewei Technologies, Inc.
Inventor： Daoshen Chen , Heping Dai , Xujun Liu , Zhihua Liu , Liming Ye , Dianbo Fu , Ce Liu , Bing Cai
Abstract: A system comprises an input power stage coupled to a primary side of a transformer, an output power stage coupled to a secondary side of a transformer, a first common node capacitor and a common node resistor connected in series between a midpoint of the secondary side of the transformer and ground and a detector having an input connected to a common node of the first common node capacitor and the common node resistor, and an output connected to a control circuit, wherein the control circuit is configured to dynamically adjust a switching frequency of the system based upon an output of the detector.
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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
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.
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Patent Agency Ranking
公开(公告)号：US10177661B2
公开(公告)日：2019-01-08
申请号：US14739827
申请日：2015-06-15
Applicant: Futurewei Technologies, Inc.
Inventor： Liming Ye , Jinbo Huang , Heping Dai , Dianbo Fu , Daoshen Chen
Abstract: A method comprises generating a first ramp signal and a second ramp signal for controlling a buck converter portion and a boost converter portion of a buck-boost converter respectively, comparing the first ramp signal and the second ramp signal to a control signal, controlling the buck converter portion using the comparing the first ramp signal to the control signal and the boost converter portion using the comparing the second ramp signal to the control signal, comparing a current flowing through the inductor to a current threshold and terminating a switching cycle based upon the comparing the current flowing through the inductor to the current threshold.
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公开(公告)号：US10135350B2
公开(公告)日：2018-11-20
申请号：US15954424
申请日：2018-04-16
Applicant: Futurewei Technologies, Inc.
Inventor： Liming Ye , Heping Dai , Dianbo Fu
Abstract: A converter is provided. The converter includes a first DC/DC converter, a non-isolated DC/DC converter and a control circuit. The first DC/DC converter includes a transformer, a primary side inverter and a secondary side rectifier. The primary side inverter and a secondary side rectifier are operable at multiple operating modes. The control circuit determines an operating mode for the primary side inverter or the secondary side rectifier, and controls the primary side inverter or the secondary side rectifier to change its respective operating mode.
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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.
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公开(公告)号：US20180233614A1
公开(公告)日：2018-08-16
申请号：US15650370
申请日：2017-07-14
Applicant: Futurewei Technologies, Inc.
Inventor： Heping Dai , Liming Ye , Dianbo Fu , Xiaolin Mao
IPC: H01L31/05 , H01L31/18 , H01L31/02 , H01L31/0443
Abstract: The disclosure relates to technology for providing power, voltage, and/or current from a combination of photovoltaic modules. In one aspect, a system has central power optimizer, which is located between a group of distributed power optimizers and a solar inverter. Each distributed power optimizer may be connected to the DC output of one photovoltaic modules, and may be used to regulate the power output of the photovoltaic module. The combined DC voltages of the distributed power optimizers may be provided to the input of the central power optimizer.
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公开(公告)号：US20180226890A1
公开(公告)日：2018-08-09
申请号：US15650355
申请日：2017-07-14
Applicant: Futurewei Technologies, Inc.
Inventor： Heping Dai
CPC classification number: H02M3/1582 , G01K7/16 , H01F17/0013 , H02J3/383 , H02J7/0016 , H02J7/35 , H02M3/158 , H02M3/1584 , H02M3/33523 , H02M7/48 , H02M2001/0032 , H02M2001/0074 , H02M2001/0077 , H02M2001/0093 , H02S50/00 , Y02E10/56
Abstract: The disclosure relates to technology for providing power, voltage, and/or current from a combination of DC sources. The DC sources may be photovoltaic panels. One aspect includes a stack of DC power sources (e.g., photovoltaic modules) with a DC to DC converter (e.g., power optimizer) associated with each DC power source. An output capacitor of a DC to DC converter is connected in series with its DC power source. Thus, there is a string of DC power sources and output capacitors connected in electrical series. The DC output of the system is a series connection of the DC power sources and the output capacitors. This reduces stress on the output capacitors, while allowing for efficient power generation by the DC power sources.
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