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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：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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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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