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公开(公告)号：US11258265B2
公开(公告)日：2022-02-22
申请号：US16780293
申请日：2020-02-03
发明人： Heping Dai , Xiaolin Mao , Dianbo Fu , Huibin Zhu
摘要： 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.
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公开(公告)号：US10903656B2
公开(公告)日：2021-01-26
申请号：US16544525
申请日：2019-08-19
摘要： A system comprises a first five-level inverter connected between a dc power source and an ac grid, a second five-level inverter connected between the dc power source and the ac grid and a third five-level inverter connected between the dc power source and the ac grid, wherein each five-level inverter comprises a first boost apparatus and a second boost apparatus.
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公开(公告)号：US20200153249A1
公开(公告)日：2020-05-14
申请号：US16741259
申请日：2020-01-13
发明人： Xiaolin Mao , Heping Dai , Huibin Zhu , Dianbo Fu
摘要： 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：US10554050B2
公开(公告)日：2020-02-04
申请号：US15493796
申请日：2017-04-21
发明人： Heping Dai , Xiaolin Mao , Dianbo Fu , Huibin Zhu
摘要： A method comprises operating a plurality of power optimizers connected in series between two input terminals of an inverter, wherein the plurality of power optimizers are connected to a plurality of solar panels to form a plurality of power modules connected in series, measuring operation parameters of the plurality of the solar panels, calculating a maximum power flow of each solar panel based upon the measuring, determining a mode transition range based upon the maximum power flows of the plurality of solar panels and configuring a first power optimizer to operate in a pass-through mode if a maximum power point tracking (MPPT) current of a first solar panel connected to the first power optimizer is within the mode transition range.
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公开(公告)号：US10404187B2
公开(公告)日：2019-09-03
申请号：US15924853
申请日：2018-03-19
发明人： Dianbo Fu , Yunfeng Liu
摘要： A system comprises a plurality of inverter units having inputs connected to a power source and a coupled inductor comprising a plurality of windings and coupled between the plurality of inverter units and an output filter, wherein each winding of the plurality of windings has a first terminal connected to an output of a corresponding inverter unit and second terminals of the plurality of windings are connected together.
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公开(公告)号：US20190238059A1
公开(公告)日：2019-08-01
申请号：US15884211
申请日：2018-01-30
发明人： Heping Dai , Xiaolin Mao , Dianbo Fu
IPC分类号： H02M3/335
摘要： A DC to DC voltage converter includes a first voltage converter module configurable to generate a first output at a first output voltage selected from two or more different voltages and a second voltage converter module configurable to generate a second output at a second output voltage selected from two or more different voltages. The first voltage converter module and the second voltage converter module have a common input. A common output combines the first output voltage from the first voltage converter module and the second output voltage from the second voltage converter module.
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7.发明申请公开(公告)号：US20190173374A1
公开(公告)日：2019-06-06
申请号：US16266983
申请日：2019-02-04
摘要： In certain embodiments, an apparatus includes an inductor having first and second terminals. The first terminal is configured to be coupled to a power source. The apparatus includes a pair of serially-coupled transistors coupled to the second terminal of the inductor. A transistor intermediate node is positioned between the pair of serially-coupled transistors. The apparatus includes a pair of serially-coupled diodes coupled to the second terminal of the inductor. A diode intermediate node is positioned between the pair of serially-coupled diodes. The apparatus includes a first capacitor coupled in parallel with the serially-coupled transistors and the serially-coupled diodes. The apparatus includes a sub-circuit having a second capacitor serially-coupled with an auxiliary transistor. The sub-circuit is coupled between the transistor intermediate node and the diode intermediate node and is in parallel with a transistor of the pair of serially coupled transistors and with a diode of the pair of serially-coupled diodes.
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8.发明申请公开(公告)号：US20190074774A1
公开(公告)日：2019-03-07
申请号：US16173904
申请日：2018-10-29
发明人： Daoshen Chen , Heping Dai , Xujun Liu , Zhihua Liu , Liming Ye , Dianbo Fu , Ce Liu , Bing Cai
摘要： 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：US09812968B2
公开(公告)日：2017-11-07
申请号：US14548106
申请日：2014-11-19
发明人： Jinbo Huang , Xujun Liu , Dianbo Fu , Liming Ye , Heping Dai , Daoshen Chen
CPC分类号： H02M3/33507 , H02M3/158 , H02M3/1582 , H02M2001/0009 , H02M2001/0058 , Y02B70/1425 , Y02B70/1433 , Y02B70/1491
摘要： A converter comprises a switch network coupled to a power source, wherein the switch network comprises a plurality of power switches, a magnetic device coupled to the switch network, a detector coupled to the magnetic device through a magnetic coupling and a control circuit configured to receive a zero voltage switching signal from the detector and adjust gate drive signals of the power switches based upon the zero voltage switching signal.
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公开(公告)号：US09806601B2
公开(公告)日：2017-10-31
申请号：US14671181
申请日：2015-03-27
发明人： Dianbo Fu
CPC分类号： H02M1/4225 , H02M3/158 , H02M7/483 , H02M2001/007
摘要： A converter comprises a first switch, a second switch, a first blocking device and a second blocking device connected in series between two terminals of an output capacitor, an inductor coupled between a dc input source and a common node of the second switch and the first blocking device and a capacitor coupled between a common node of the first switch and the second switch, and a common node of the first blocking device and the second blocking device, wherein a voltage across the capacitor is configured to be adjustable through adjusting duty cycles of the first switch and the second switch.
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