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公开(公告)号：US09859816B2
公开(公告)日：2018-01-02
申请号：US15279446
申请日：2016-09-29
发明人： Feng Chen , Cheng Lu , Wei-Qiang Zhang , Hong-Yang Wu
IPC分类号： H02M7/537 , H02M7/5387 , H02M7/5395 , H02M7/487 , H02M1/00
CPC分类号： H02M7/537 , H02M7/487 , H02M7/53871 , H02M7/5395 , H02M2001/0025 , H02M2001/0054 , Y02B70/1491
摘要： A method for controlling modulation wave and a three-phase three-wire three-level circuit are provided. The method for controlling modulation wave is applied in the three-phase three-wire three-level circuit. Three bridge arms of the three-phase three-wire three-level circuit correspond to three modulation waves. The three-phase three-wire three-level circuit is controlled by comparing said three modulation waves and a carrier wave. The method for controlling modulation wave includes: obtaining a primary modulation wave from said modulation waves based on currents corresponding to each phase of the three-phase three-wire three-level circuit; and adding a shifting quantity to said three modulation waves such that the primary modulation wave is shifted to a peak value, a valley value, or a middle value between the peak value and the valley value of the carrier wave.
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公开(公告)号：US11811310B2
公开(公告)日：2023-11-07
申请号：US17447069
申请日：2021-09-08
CPC分类号： H02M3/04 , H02M7/04 , H02J7/0013
摘要： Embodiments of the present disclosure provide a power conversion system and a control method. The power conversion system includes multiple power modules, and each power module includes a first port, a second port, and a third port, where the first port of each power module is connected to an external device, second ports of the power modules are independent of each other and used as independent ports to output power, third ports of the power modules are connected in parallel to form a power bus and power flow of the third port of each power module is bidirectional.
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公开(公告)号：US11811297B2
公开(公告)日：2023-11-07
申请号：US17658656
申请日：2022-04-11
发明人： Hong Liu , Jie Kong , Wen Zhang , Baihui Song , Cheng Lu , Hongyang Wu
CPC分类号： H02M3/24 , H02J7/0013 , H02J2207/20
摘要： A power module includes N inverter units outputting N AC voltages and being coupled to N high-frequency AC terminals, wherein the N high-frequency AC terminals are cascaded and connected to a post-stage rectifier circuit. A phase-shift control method for the power module includes: setting at least two phase-shift sequences, wherein phase sequence numbers of the N AC voltages of the N inverter units are different in the at least two phase-shift sequences; in one switching period, controlling the N AC voltages of the N inverter units to shift a first angle according to a first phase-shift sequence of the at least two phase-shift sequences; and in another switching period, controlling the N AC voltages of the N inverter units to shift the first angle according to a second phase-shift sequence of the at least two phase-shift sequences.
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公开(公告)号：US11509241B2
公开(公告)日：2022-11-22
申请号：US17153551
申请日：2021-01-20
摘要： A power conversion system includes N power converters. Each power converter includes an input terminal, a first output terminal and a second output terminal. Each of the N power converters receives a DC power through the corresponding input terminal. The first output terminal of a first power converter of the N power converters and the second output terminal of an N-th power converter of the N power converters are connected in parallel to form an N-th total output terminal to output an N-th total output power. The first output terminal of an i-th power converter of the N power converters and the second output terminal of an (i−1)-th power converter of the N power converters are connected in parallel to form an (i−1)-th total output terminal to output an (i−1)-th total output power.
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公开(公告)号：US20220140746A1
公开(公告)日：2022-05-05
申请号：US17153551
申请日：2021-01-20
摘要： A power conversion system includes N power converters. Each power converter includes an input terminal, a first output terminal and a second output terminal. Each of the N power converters receives a DC power through the corresponding input terminal. The first output terminal of a first power converter of the N power converters and the second output terminal of an N-th power converter of the N power converters are connected in parallel to form an N-th total output terminal to output an N-th total output power. The first output terminal of an i-th power converter of the N power converters and the second output terminal of an (i−1)-th power converter of the N power converters are connected in parallel to form an (i−1)-th total output terminal to output an (i−1)-th total output power.
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26.发明授权公开(公告)号：US10084393B2
公开(公告)日：2018-09-25
申请号：US15871122
申请日：2018-01-15
IPC分类号： H02M7/48 , H02M7/5387 , H02M7/49 , H02M1/00 , H02M1/32
CPC分类号： H02M7/5387 , H02M1/32 , H02M7/49 , H02M2001/007 , H02M2001/0074
摘要： A method of putting a converter module of a cascade converter system into operation, wherein the cascade converter system includes: n converter modules; n bypass switch modules; and a system controller, wherein the method includes: a module pre-plug-in step: m bypass switch modules of the n bypass switch modules being in a non-bypass state, and remaining n-m bypass switch modules being in a bypass state, the system controller communicating with the module controllers of the m converter modules, such that the m converter modules operate according to a first control signal, wherein 1≤m
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