Patents by Inventor Guoxing Fan

Guoxing Fan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220385173
    Abstract: Embodiments of present disclosure relates to a power factor correction circuit and an industrial robot. The power factor correction circuit has first and second AC terminals, first and second DC terminals, a first input inductor connected to the first AC terminal, a second input inductor connected to the second AC terminal, a first coupling inductor, configured to suppress a leakage current of the power factor correction circuit.
    Type: Application
    Filed: November 21, 2019
    Publication date: December 1, 2022
    Inventors: Sheng Zong, Guoxing Fan, Mei Liang
  • Patent number: 11171557
    Abstract: A power converter includes a full-bridge conversion circuit. The full-bridge conversion circuit includes a first leg and a second leg. The first leg includes at least two switches coupled to each other at a first node, and the second leg includes at least two switches coupled to each other at a second node. The power converter further includes an AC filter. The AC filter includes a first inductor, a second inductor and a capacitor. The first inductor includes a first end coupled to the first node and a second end could be couple to a grid. The second inductor includes a first end coupled to the second node and a second end could be couple to the grid. The capacitor includes a first end coupled to the second end of the first inductor and a second end coupled to the second leg. The first end of the capacitor is electrically coupled to the second end of the first inductor during a cycle of an AC voltage of the grid.
    Type: Grant
    Filed: September 18, 2020
    Date of Patent: November 9, 2021
    Assignee: ABB Schweiz AG
    Inventors: Sheng Zong, Guoxing Fan, Kai Tian, Mei Liang
  • Publication number: 20210006149
    Abstract: A power converter includes a full-bridge conversion circuit. The full-bridge conversion circuit includes a first leg and a second leg. The first leg includes at least two switches coupled to each other at a first node, and the second leg includes at least two switches coupled to each other at a second node. The power converter further includes an AC filter. The AC filter includes a first inductor, a second inductor and a capacitor. The first inductor includes a first end coupled to the first node and a second end could be couple to a grid. The second inductor includes a first end coupled to the second node and a second end could be couple to the grid. The capacitor includes a first end coupled to the second end of the first inductor and a second end coupled to the second leg. The first end of the capacitor is electrically coupled to the second end of the first inductor during a cycle of an AC voltage of the grid.
    Type: Application
    Filed: September 18, 2020
    Publication date: January 7, 2021
    Inventors: Sheng Zong, Guoxing Fan, Kai Tian, Mei Liang
  • Patent number: 10666154
    Abstract: A DC to DC converter with intermediate conversion into AC power, including: a transformer having a primary winding and a secondary winding; a first DC to AC conversion circuit having its AC terminals coupled with the primary winding of the transformer; a first AC to DC conversion circuit having its AC terminals coupled across a first tap and a second tap of the secondary winding of the transformer; a second AC to DC conversion circuit having its AC terminals coupled across a third tap and a fourth tap of the secondary winding of the transformer, wherein the first tap and the second tap are arranged between the third tap and the fourth tap along the secondary winding of the transformer; and at least one first power switch, being arranged between one of DC terminals of the first AC to DC conversion circuit and one of DC terminals of the second AC to DC conversion circuit. By having the solution as above, the DC output voltage may be changed between two levels by operating only one power switch.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: May 26, 2020
    Assignee: ABB Schweiz AG
    Inventors: Dawei Yao, Xiaobo Yang, Guoxing Fan, Sheng Zong
  • Publication number: 20200076317
    Abstract: A DC to DC converter with intermediate conversion into AC power, including: a transformer having a primary winding and a secondary winding; a first DC to AC conversion circuit having its AC terminals coupled with the primary winding of the transformer; a first AC to DC conversion circuit having its AC terminals coupled across a first tap and a second tap of the secondary winding of the transformer; a second AC to DC conversion circuit having its AC terminals coupled across a third tap and a fourth tap of the secondary winding of the transformer, wherein the first tap and the second tap are arranged between the third tap and the fourth tap along the secondary winding of the transformer; and at least one first power switch, being arranged between one of DC terminals of the first AC to DC conversion circuit and one of DC terminals of the second AC to DC conversion circuit. By having the solution as above, the DC output voltage may be changed between two levels by operating only one power switch.
    Type: Application
    Filed: May 31, 2019
    Publication date: March 5, 2020
    Inventors: Dawei Yao, Xiaobo Yang, Guoxing Fan, Sheng Zong
  • Patent number: 10581334
    Abstract: The application relates to a DC to DC converter and control method thereof. The DC to DC converter includes a first converter circuit, a second converter circuit, a transformer having a primary winding and a secondary winding, a first resonant tank having a first capacitive element and a first inductive element, and a second resonant tank having a second capacitive element and a second inductive element. The first capacitive element and the first inductive element are coupled between the first converter circuit and the primary winding of the transformer; the second capacitive element and the second inductive element are coupled between the second converter circuit and the secondary winding of the transformer.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: March 3, 2020
    Assignee: ABB Schweiz AG
    Inventors: Sheng Zong, Xiaobo Yang, Guoxing Fan, Dawei Yao
  • Publication number: 20190288607
    Abstract: The application relates to a DC to DC converter and control method thereof. The DC to DC converter includes a first converter circuit, a second converter circuit, a transformer having a primary winding and a secondary winding, a first resonant tank having a first capacitive element and a first inductive element, and a second resonant tank having a second capacitive element and a second inductive element. The first capacitive element and the first inductive element are coupled between the first converter circuit and the primary winding of the transformer; the second capacitive element and the second inductive element are coupled between the second converter circuit and the secondary winding of the transformer.
    Type: Application
    Filed: June 4, 2019
    Publication date: September 19, 2019
    Inventors: Sheng Zong, Xiaobo Yang, Guoxing Fan, Dawei Yao
  • Patent number: 10396676
    Abstract: The invention relates to a bidirectional DC-DC converter with intermediate conversion into AC power, including: a DC-AC conversion circuit using a plurality of MOSFETs; an AC-DC conversion circuit using a plurality of power diodes; a transformer; a pair of switches, one of which being inserted in series between a DC terminal of the DC-AC conversion circuit and the AC-DC conversion circuit and the other of which being inserted in series between another DC terminal of the DC-AC conversion circuit and the AC-DC conversion circuit; and a controller being adapted for turning on the pair of switches such that the plurality of power diodes of the AC-DC conversion circuit are reverse-biased where the AC power is transferred in the forward direction and turning off the pair of switches where the AC power is transferred in the backward direction.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: August 27, 2019
    Assignee: ABB Schweiz AG
    Inventors: Xiaobo Yang, Kuenfaat Yuen, Guoxing Fan, Dawei Yao, Francisco Canales
  • Publication number: 20190020281
    Abstract: The invention relates to a bidirectional DC-DC converter with intermediate conversion into AC power, including: a DC-AC conversion circuit using a plurality of MOSFETs; and an AC-DC conversion circuit using a plurality of power diodes; a transformer magnetically coupling a first winding and a second winding, wherein the first winding being electrically connected between the DC-AC conversion circuit AC terminals and being electrically connected between the AC-DC conversion circuit AC terminals in an arrangement such that the AC power generated from the intermediate conversion by an operation of the DC-AC conversion is transferred by the transformer in a forward direction from the first winding to the second winding, and the AC-DC conversion circuit converts the AC power transferred in a backward direction from the second winding to the first winding into DC power; a pair of switches, one of which being inserted in series between respective DC terminals of the DC-AC conversion circuit and the AC-DC conversion c
    Type: Application
    Filed: September 17, 2018
    Publication date: January 17, 2019
    Inventors: Xiaobo Yang, Kuenfaat Yuen, Guoxing Fan, Dawei Yao, Francisco Canales