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1.发明申请公开(公告)号：US20220302848A1
公开(公告)日：2022-09-22
申请号：US17534176
申请日：2021-11-23
Applicant: Eaton Intelligent Power Limited
Inventor： Jianxiong Yu , Jiajie Duan , Han Li , Cheng Luo , Qiang Chen
Abstract: The present invention provides an auxiliary pre-charging device for a power converter. The power converter includes at least one power unit with an input end being connected to a medium and high voltage AC power source, and an output end being connected to a low voltage DC bus, wherein the auxiliary pre-charging device includes a switch, a transformer, a pre-charging resistor, and a rectifier sequentially connected in series, one end of the switch is connected to the medium and high voltage AC power source, and an output end of the rectifier is connected to the low voltage DC bus. The present invention also provides a pre-charging method for a power converter, which uses the aforementioned auxiliary pre-charging device to start pre-charging at the low-voltage output end of the power converter.
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公开(公告)号：US20250070647A1
公开(公告)日：2025-02-27
申请号：US18795941
申请日：2024-08-06
Applicant: EATON INTELLIGENT POWER LIMITED
Inventor： Jianxiong Yu , Jiajie Duan , Cheng Luo , Cheng Wang
Abstract: A harmonic suppression method and apparatus for a three-phase three-wire cascaded power conversion apparatus is disclosed. The method can include: calculating a first current output from a full-bridge rectifier module to a floating direct current side, the first current being composed of a first current direct current component and a first current double frequency component; and generating a first injection voltage with a triple frequency, so as to inject the first injection voltage into the floating direct current side and transfer at least a portion of the first current double frequency component to a low-voltage direct current side, where total current on the floating direct current side is composed of the first current and a second current after the first injection voltage is injected, the second current is composed of a second current double frequency component and a second current quadruple frequency component, and the amplitude and the phase angle of the first injection voltage are configured so that the first and second current double frequency components are at least partially canceled. The method reduces the demand for capacitance on the floating direct current side of the power conversion apparatus, resulting in a significant increase in power density and high power conversion efficiency.
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3.发明授权公开(公告)号：US12136887B2
公开(公告)日：2024-11-05
申请号：US17930949
申请日：2022-09-09
Applicant: Eaton Intelligent Power Limited
Inventor： Jiajie Duan , Jianxiong Yu , Qiang Chen , Han Li , Cheng Luo , Dongsheng Li
Abstract: The present invention provides a multi-active bridge converter. The converter comprises n multi-active bridges, wherein each of the n multi-active bridges comprises a DC/AC bridge, a single-phase transformer and m AC/DC bridges, where n is greater than or equal to 3, and m is greater than or equal to 1; the single-phase transformer is provided with one primary winding and m secondary windings; the DC/AC bridge is configured to receive a DC input signal, and AC output terminals of the DC/AC bridge are connected to the primary winding of the single-phase transformer; one terminal of the ith secondary winding among the m secondary windings of the single-phase transformer is connected to an AC input terminal of the ith AC/DC bridge among the m AC/DC bridges, the other terminal of the ith secondary winding is connected to the other terminals of the ith secondary windings among m secondary windings of single-phase transformers in the remaining (n−1) multi-active bridges, where i is greater than or equal to 1 and less than or equal to m; and positive busbars DC+ and negative busbars DC− of the DC output terminals of all the AC/DC bridges among the n multi-active bridges are respectively connected with each other to serve as DC output terminals of the multi-active bridge converter.
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公开(公告)号：US20250125708A1
公开(公告)日：2025-04-17
申请号：US18909226
申请日：2024-10-08
Applicant: Eaton Intelligent Power Limited
Inventor： Jiajie Duan , Jianxiong Yu , Cheng Wang , Cheng Luo
IPC: H02M1/00 , H02M1/12 , H02M7/5387
Abstract: A power converter and a staircase modulation method therefor are provided. The power converter includes n cascaded bridges, where n≥2, the n cascaded bridges are each configured to output same multilevel pulses, the output n multilevel pulses are sequentially phase-shifted by a same angle, and the n multilevel pulses are superposed on each other to form a desired output pulse waveform of the power converter. Each of the n cascaded bridges is configured such that an output pulse of each cascaded bridge includes 2k+1 sub-pulses in each half cycle, where k≥1; and the 2k+1 sub-pulses are symmetrically distributed by using a (k+1)th sub-pulse as a center, pulse widths from a 1st sub-pulse to the (k+1)th sub-pulse sequentially increase, and pulse widths from the (k+1) sub-pulse to a (2k+1)th sub-pulse sequentially decrease.
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Patent Agency Ranking
公开(公告)号：US20250079075A1
公开(公告)日：2025-03-06
申请号：US18816070
申请日：2024-08-27
Applicant: Eaton Intelligent Power Limited
Inventor： Jianxiong Yu , Cheng Luo , Jiajie Duan , Cheng Wang
Abstract: Provided are a transformer winding and a method for constructing a transformer winding. The transformer winding includes: a winding conductor having a ring structure; a first insulating layer wrapped on a surface of the winding conductor formed by winding; a conductor tape attached in an unclosed surrounding manner to a surface of the first insulating layer along a circumferential direction of the first insulating layer, where the conductor tape is attached to a position having a minimum value of a leakage flux on the surface of the first insulating layer; a first shielding layer attached to the surface of the first insulating layer with the conductor tape attached thereto; a second insulating layer cast outside the first shielding layer; and a second shielding layer wrapped on an outer surface of the second insulating layer.
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公开(公告)号：US20250125743A1
公开(公告)日：2025-04-17
申请号：US18909127
申请日：2024-10-08
Applicant: Eaton Intelligent Power Limited
Inventor： Cheng Luo , Jianxiong Yu , Cheng Wang , Jiajie Duan
Abstract: A power converter is provided. The power converter is configured to be connected between a multi-phase alternating current power supply derived from an alternating current power network and a load. For each phase of the alternating current power supply, the power converter includes n power modules, and each power module has: one alternating current input end; m power units connected in parallel to the alternating current input end; and m direct current output ends. Alternating current input ends of the n power modules are sequentially connected in series and are connected between a corresponding phase and a common node. Direct current output ends of selected power units are connected in parallel to form one direct current output of the power converter. The disclosure can simultaneously meet loads with different requirements without adding additional DC/DC converters, thereby reducing consumption generated in a power conversion process.
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公开(公告)号：US20250087412A1
公开(公告)日：2025-03-13
申请号：US18813920
申请日：2024-08-23
Applicant: EATON INTELLIGENT POWER LIMITED
Inventor： Jianxiong Yu , Cheng Luo , Jiajie Duan , Cheng Wang
Abstract: Provided are a transformer winding and a method for constructing a transformer winding. The transformer winding includes: a lead wire of a winding conductor of the transformer winding; an insulating layer wrapping the lead wire; a ground shielding layer covering a side, close to the winding conductor, of the insulating layer; and a stress grading material layer, which is made of a semi-conductive material, covers a side, away from the winding conductor, of the insulating layer, and is electrically connected to the ground shielding layer, where the stress grading material layer is impedance-matched with the insulating layer.
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公开(公告)号：US20250070680A1
公开(公告)日：2025-02-27
申请号：US18809718
申请日：2024-08-20
Applicant: Eaton Intelligent Power Limited
Inventor： Jianxiong Yu , Jiajie Duan , Cheng Luo , Cheng Wang
Abstract: Provided is a direct current voltage sampling circuit used for a medium-voltage power module. The medium-voltage power module includes two cascaded H-bridge circuits. The sampling circuit includes two sampling sub-circuits, with each connected to one H-bridge circuit. The sampling sub-circuit includes: a voltage dividing circuit connected in parallel to an output end of the H-bridge circuit, an isolation module connected to the voltage dividing circuit, a direct current isolated power supply which supplies power to the isolation module independently of the H-bridge circuit, and an amplifier conditioning module which converts an isolated voltage signal into a sampled voltage output. Parasitic capacitances of the isolation module and the direct current isolated power supply are both less than 2 pF, and the sampled voltage outputs of the two sampling sub-circuits are provided to a same local controller. The sampling circuit can suppress the impact of circulation components between two direct current buses in double cascaded bridges, making sampling results more accurate.
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9.发明申请公开(公告)号：US20230081157A1
公开(公告)日：2023-03-16
申请号：US17930949
申请日：2022-09-09
Applicant: Eaton Intelligent Power Limited
Inventor： Jiajie Duan , Jianxiong Yu , Qiang Chen , Han Li , Cheng Luo , Dongsheng Li
Abstract: The present invention provides a multi-active bridge converter. The converter comprises n multi-active bridges, wherein each of the n multi-active bridges comprises a DC/AC bridge, a single-phase transformer and m AC/DC bridges, where n is greater than or equal to 3, and m is greater than or equal to 1; the single-phase transformer is provided with one primary winding and m secondary windings; the DC/AC bridge is configured to receive a DC input signal, and AC output terminals of the DC/AC bridge are connected to the primary winding of the single-phase transformer; one terminal of the ith secondary winding among the m secondary windings of the single-phase transformer is connected to an AC input terminal of the ith AC/DC bridge among the m AC/DC bridges, the other terminal of the ith secondary winding is connected to the other terminals of the ith secondary windings among m secondary windings of single-phase transformers in the remaining (n−1) multi-active bridges, where i is greater than or equal to 1 and less than or equal to m; and positive busbars DC+ and negative busbars DC− of the DC output terminals of all the AC/DC bridges among the n multi-active bridges are respectively connected with each other to serve as DC output terminals of the multi-active bridge converter.
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