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公开(公告)号：US12095350B2
公开(公告)日：2024-09-17
申请号：US18010435
申请日：2021-05-21
发明人： Yue Dong , Jiacai Zhuang , Jun Xu
CPC分类号： H02M1/007 , H02M1/0074 , H02M1/081 , H02M3/33576 , H02M7/217 , H02M7/483 , H02M7/49
摘要： A cascaded power electronic transformer and a method for controlling the same are provided. The method includes: calculating electrical angles θi1 and θkps of an sth transformer and a compensation electrical angle θj of a jth transformer; adding the compensation electrical angle θj to the electrical angle θkps of the jth transformer, to obtain a compensated electrical angle θkps of the jth transformer; and calculating a square wave of a bridge arm voltage of each of the m primary converters and the r secondary converters of the sth transformer based on the electrical angle θi1 and the electrical angle θkps of the sth transformer after compensation.
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公开(公告)号：US20240291376A1
公开(公告)日：2024-08-29
申请号：US18541309
申请日：2023-12-15
IPC分类号： H02M1/08 , H02M1/088 , H02M1/32 , H02M5/257 , H02M5/293 , H02M7/06 , H05B39/04 , H05B45/10 , H05B45/37 , H05B45/3725
CPC分类号： H02M1/081 , H02M1/088 , H02M1/32 , H02M5/2573 , H02M5/293 , H02M7/06 , H05B39/04 , H05B39/044 , H05B39/048 , H05B45/10 , H05B45/37 , H05B45/3725 , H02M1/0006 , H02M1/0012 , H05B45/375 , H05B45/38 , H05B45/39
摘要： A load control device for controlling the power delivered from an AC power source to an electrical load includes a thyristor, a gate coupling circuit for conducting a gate current through a gate of the thyristor, and a control circuit for controlling the gate coupling circuit to conduct the gate current through a first current path to render the thyristor conductive at a firing time during a half cycle. The gate coupling circuit is able to conduct the gate current through the first current path again after the firing time, but the gate current is not able to be conducted through the gate from a transition time before the end of the half-cycle until approximately the end of the half-cycle. The load current is able to be conducted through a second current path to the electrical load after the transition time until approximately the end of the half-cycle.
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公开(公告)号：US20240113617A1
公开(公告)日：2024-04-04
申请号：US18372010
申请日：2023-09-22
发明人： Yung-Sheng Yeh , Chih-Wei Liang
CPC分类号： H02M1/4233 , H02M1/0085 , H02M1/081
摘要： A totem-pole PFC circuit and a control method thereof are provided. The circuit includes an AC power source, first and second bridge arms and a controller. The first bridge arm includes first and second switches electrically connected in series with a connection node electrically connected to a first terminal of the AC power source. The second bridge arm includes third and fourth switches electrically connected in series with a connection node electrically connected to a second terminal of the AC power source. When a potential at the first terminal is higher than a potential at the second terminal, the controller turns off the fourth switch if the L-phase voltage is lower than a first threshold voltage. When the potential at the first terminal is lower than the potential at the second terminal, the controller turns off the third switch if the L-phase voltage is higher than a second threshold voltage.
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公开(公告)号：US20240106355A1
公开(公告)日：2024-03-28
申请号：US18468157
申请日：2023-09-15
发明人： Qixue Yu , Ting He , Juan Zhang , Kun Dou
IPC分类号： H02M7/5395 , H02M1/08 , H02M1/12
CPC分类号： H02M7/5395 , H02M1/081 , H02M1/123 , H02M1/126
摘要： Embodiments of the present disclosure provide a method for controlling a converter and a converter system. The method includes obtaining voltage signals indicating phase voltages of three phases at AC side of a converter, determining, based on the voltage signals, carrier signals of a three-phase switching branches of the converter, wherein carrier signals of two of three phases have the same phase with each other and have a different phase from a carrier signal of the rest phase of the three phases, and magnitude of a phase voltage of the rest phase is between the phase voltages of the two phases, and generating, based on the determined carrier signals and modulation wave signals of the three-phase switching branches, control signals of the three-phase switching branch.
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公开(公告)号：US20230299658A1
公开(公告)日：2023-09-21
申请号：US18321881
申请日：2023-05-23
CPC分类号： H02M1/081 , H02M1/32 , H02M7/217 , H02M7/125 , H03K17/168 , H05B39/044 , H05B45/50 , H02M1/083
摘要： A load control device for controlling power delivered from an alternating-current power source to an electrical load may comprise a controllably conductive device, a control circuit, and an overcurrent protection circuit that is configured to be disabled when the controllably conductive device is non-conductive. The control circuit may be configured to control the controllably conductive device to be non-conductive at the beginning of each half-cycle of the AC power source and to render the controllably conductive device conductive at a firing time during each half-cycle (e.g., using a forward phase-control dimming technique). The overcurrent protection circuit may be configured to render the controllably conductive device non-conductive in the event of an overcurrent condition in the controllably conductive device. The overcurrent protection circuit may be disabled when the controllably conductive device is non-conductive and enabled after the firing time when the controllably conductive device is rendered conductive during each half-cycle.
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公开(公告)号：US20230223833A1
公开(公告)日：2023-07-13
申请号：US18174064
申请日：2023-02-24
IPC分类号： H02M1/08 , H05B45/37 , H05B39/04 , H02M7/06 , H02M1/088 , H05B45/3725 , H02M1/32 , H05B45/10 , H02M5/293 , H02M5/257 , H02M1/00 , H05B45/39 , H05B45/375 , H05B45/38
CPC分类号： H02M1/081 , H02M1/32 , H02M1/088 , H02M5/293 , H02M5/2573 , H02M7/06 , H05B39/04 , H05B39/044 , H05B39/048 , H05B45/10 , H05B45/37 , H05B45/3725 , H02M1/0006 , H02M1/0012 , H05B45/38 , H05B45/39 , H05B45/375
摘要： A load control device for controlling the power delivered from an AC power source to an electrical load includes a thyristor, a gate coupling circuit for conducting a gate current through a gate of the thyristor, and a control circuit for controlling the gate coupling circuit to conduct the gate current through a first current path to render the thyristor conductive at a firing time during a half cycle. The gate coupling circuit is able to conduct the gate current through the first current path again after the firing time, but the gate current is not able to be conducted through the gate from a transition time before the end of the half-cycle until approximately the end of the half-cycle. The load current is able to be conducted through a second current path to the electrical load after the transition time until approximately the end of the half-cycle.
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公开(公告)号：US11699946B2
公开(公告)日：2023-07-11
申请号：US17587349
申请日：2022-01-28
IPC分类号： H02M1/08 , H02M1/32 , H02M7/12 , H05B45/10 , H05B45/31 , H02M7/217 , H03K17/16 , H05B39/04 , H05B45/50
CPC分类号： H02M1/081 , H02M1/083 , H02M1/32 , H02M7/125 , H02M7/217 , H03K17/168 , H05B39/044 , H05B45/50
摘要： A load control device for controlling power delivered from an alternating-current power source to an electrical load may comprise a controllably conductive device, a control circuit, and an overcurrent protection circuit that is configured to be disabled when the controllably conductive device is non-conductive. The control circuit may be configured to control the controllably conductive device to be non-conductive at the beginning of each half-cycle of the AC power source and to render the controllably conductive device conductive at a firing time during each half-cycle (e.g., using a forward phase-control dimming technique). The overcurrent protection circuit may be configured to render the controllably conductive device non-conductive in the event of an overcurrent condition in the controllably conductive device. The overcurrent protection circuit may be disabled when the controllably conductive device is non-conductive and enabled after the firing time when the controllably conductive device is rendered conductive during each half-cycle.
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公开(公告)号：US20180183344A1
公开(公告)日：2018-06-28
申请号：US15846324
申请日：2017-12-19
申请人： TDK CORPORATION
CPC分类号： H02M3/33584 , H02M1/081 , H02M3/33592 , H02M2001/009
摘要： A converter apparatus includes: a first transformer with two windings; a first full-bridge circuit with four switches, DC input/output units connected to a first DC power supply, and AC input/output units connected via an inductor to one winding of the first transformer; a second full-bridge circuit with four switches, DC input/output units connected to a second DC power supply, and AC input/output units connected via an inductor to another winding of the first transformer; a second transformer with two windings, one being connected via an inductor to the AC input/output units of the first circuit; a third full-bridge circuit with four switches, DC input/output units connected to a third DC power supply, and AC input/output units connected via an inductor to another winding of the second transformer; and a control unit for controlling the switches to supply power between the first to third DC power supplies.
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公开(公告)号：US20180090993A1
公开(公告)日：2018-03-29
申请号：US15279094
申请日：2016-09-28
发明人： Mustapha El MARKHI , Erhan OZALEVLI , Tuli DAKE , Dingkun DU , Gianpaolo LISI , Jingwei XU
CPC分类号： H02M3/33592 , H02J50/12 , H02M1/081 , Y02B70/1433 , Y02B70/1475
摘要： A wireless power transfer system using a resonant rectifier circuit with capacitor sensing. A wireless power transfer system includes a power receiver resonant circuit and a synchronous rectifier. The power receiver resonant circuit includes an inductor and a capacitor connected in series with the inductor. The synchronous rectifier is configured to identify zero crossings of alternating current flowing through the inductor based on voltage across the capacitor, and control synchronous rectification of the alternating current based on timing of the zero crossings.
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公开(公告)号：US20180026569A1
公开(公告)日：2018-01-25
申请号：US15548173
申请日：2015-02-16
申请人： HITACHI, LTD.
CPC分类号： H02P27/14 , F02C7/32 , F04D25/06 , F05D2220/32 , F05D2220/76 , H02M1/08 , H02M1/081 , H02M7/537 , H02M7/53871 , H02P3/14 , H02P27/08 , H02P2101/25 , H02P2209/01
摘要： A control device for power conversion device controls a power conversion device in a system driven by the power conversion device to which an electric motor outputs AC power, and includes: a control pulse generation unit configured to generate a control pulse of the power conversion device; and a negative phase creation unit configured to input a pulse signal output by the control pulse generation unit and rotational speed information of the electric motor, and to generate an inverted signal of an output signal of the control pulse generation unit, wherein the pulse signal of a half cycle during one cycle of voltage, the pulse signal being generated by the control pulse generation unit, and a pulse signal of a next half cycle during the one cycle of voltage, the pulse signal being generated by the negative phase creation unit, are symmetrical in positive and negative relationship of voltage.
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