Patents by Inventor Wo Oi Cheng

Wo Oi Cheng 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: 20240153701
    Abstract: A winding for a power transformer comprises a wire at least partially covered with a bonding material. The wire comprises a first winding formed into a first winding layer comprising a first plurality of turns positioned adjacently to each other, wherein the first plurality of turns are bonded together. The wire also comprises a second winding formed into a second winding layer from a first continuous wire portion extending from the first winding layer, the second winding layer comprising a second plurality of turns positioned adjacently together.
    Type: Application
    Filed: January 19, 2024
    Publication date: May 9, 2024
    Inventors: Wo Oi Cheng, Alfredo Belmonte Grueso, Chi Wai Kevin Wong
  • Publication number: 20210383970
    Abstract: A power transformer includes at least two first windings, at least two second windings interleaved with the at least two first windings, and a magnetic core. The at least two first windings and the at least two second windings are positioned adjacent the magnetic core. Each first winding includes a wire and a plurality of turns. One or more windings of the at least two first windings include a bonding material and at least two adjacent turns of said plurality of turns adhered to each other via the bonding material. Other example power transformers, methods of manufacturing power transformers, and methods of manufacturing windings are also disclosed.
    Type: Application
    Filed: July 13, 2021
    Publication date: December 9, 2021
    Inventors: Wo Oi Cheng, Alfredo Belmonte Grueso, Chi Wai Kevin Wong
  • Patent number: 11075032
    Abstract: A power transformer includes at least two first windings, at least two second windings interleaved with the at least two first windings, and a magnetic core. The at least two first windings and the at least two second windings are positioned adjacent the magnetic core. Each first winding includes a wire and a plurality of turns. One or more windings of the at least two first windings include a bonding material and at least two adjacent turns of said plurality of turns adhered to each other via the bonding material. Other example power transformers, methods of manufacturing power transformers, and methods of manufacturing windings are also disclosed.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: July 27, 2021
    Assignee: Astec International Limited
    Inventors: Wo Oi Cheng, Alfredo Belmonte Grueso, Chi Wai Kevin Wong
  • Publication number: 20180374637
    Abstract: A power transformer includes at least two first windings, at least two second windings interleaved with the at least two first windings, and a magnetic core. The at least two first windings and the at least two second windings are positioned adjacent the magnetic core. Each first winding includes a wire and a plurality of turns. One or more windings of the at least two first windings include a bonding material and at least two adjacent turns of said plurality of turns adhered to each other via the bonding material. Other example power transformers, methods of manufacturing power transformers, and methods of manufacturing windings are also disclosed.
    Type: Application
    Filed: August 31, 2018
    Publication date: December 27, 2018
    Inventors: Wo Oi CHENG, Alfredo Belmonte GRUESO, Chi Wai WONG
  • Publication number: 20160225514
    Abstract: A power transformer includes at least two first windings, at least two second windings interleaved with the at least two first windings, and a magnetic core. The at least two first windings and the at least two second windings are positioned adjacent the magnetic core. Each first winding includes a wire and a plurality of turns. One or more windings of the at least two first windings include a bonding material and at least two adjacent turns of said plurality of turns adhered to each other via the bonding material. Other example power transformers, methods of manufacturing power transformers, and methods of manufacturing windings are also disclosed.
    Type: Application
    Filed: February 4, 2015
    Publication date: August 4, 2016
    Inventors: Wo Oi CHENG, Alfredo Belmonte GRUESO, Chi Wai WONG
  • Patent number: 8198969
    Abstract: A cost effective integrated automotive solution for a charger transformer with minimized fringing flux and core grounding for reducing electromagnetic interference (EMI). The method provides an air gap filled with a mixture of an adhesive and ferrite powder that bonds the ferrite core sections together. In addition, the ground pin of the transformer is exposed through a groove in the pocket of the bobbin on which the core is mounted and an electrical contact is established between the exposed end of the ground pin and the core surface by means of a drop of epoxy.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: June 12, 2012
    Assignee: Astec International Limited
    Inventors: Wo Oi Cheng, Alfredo Grueso
  • Publication number: 20110074532
    Abstract: A cost effective integrated automotive solution for a charger transformer with minimized fringing flux and core grounding for reducing electromagnetic interference (EMI). The method provides an air gap filled with a mixture of an adhesive and ferrite powder that bonds the ferrite core sections together. In addition, the ground pin of the transformer is exposed through a groove in the pocket of the bobbin on which the core is mounted and an electrical contact is established between the exposed end of the ground pin and the core surface by means of a drop of epoxy.
    Type: Application
    Filed: September 30, 2009
    Publication date: March 31, 2011
    Applicant: Astec International Limited
    Inventors: Wo Oi Cheng, Alfredo Grueso