Patents by Inventor Ion C. Radu

Ion C. Radu 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).

  • Patent number: 12028001
    Abstract: An apparatus having a first set of windings disposed about a first main leg of a transformer core, and a second set of windings disposed about a second main leg of the transformer core. The first set of windings are electrically coupled to the second set of windings to selectively provide a parallel connection and a series connection between the first set of windings and the second set of windings. Additionally, at least two windings of the first set of windings are electrically coupled to each other to selectively provide a parallel connection and a serial connection between the at least two windings of the first set of windings. Similarly, two windings of the second set of windings are electrically coupled to each other to selectively provide a parallel connection and a serial connection between the at least two windings of the second set of windings.
    Type: Grant
    Filed: April 14, 2020
    Date of Patent: July 2, 2024
    Assignee: HITACHI ENERGY LTD
    Inventor: Ion C. Radu
  • Patent number: 11742128
    Abstract: A transformer having a transformer core that forms a magnetic flux path between and through a top yoke, leg, and bottom yoke of the transformer core. A winding can be disposed about the leg. Further, a flitch plate, which can have at least one slot that is configured to reduce eddy losses generated by the winding, can be disposed adjacent to the leg and extend between the top yoke and the bottom yoke. The flitch plate can be clamped to the top and bottom yokes by top and bottom clamps, respectively. The top and bottom clamps can each include at least one cutout that reduces an attraction of stray flux from the winding and into the corresponding top and bottom clamps. Additionally, at least one of the top clamp and the bottom clamp can include an internal lattice structure.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: August 29, 2023
    Assignee: HITACHI ENERGY SWITZERLAND AG
    Inventors: Ion C. Radu, George K. Frimpong
  • Patent number: 11376692
    Abstract: A method for additive manufacturing of an article having a controlled magnetic anisotropy includes: forming a metallic layer of the article using additive manufacturing, the metallic layer having a magnetic anisotropy aligned in a first direction; forming a subsequent metallic layer of the article using additive manufacturing, the subsequent metallic layer having the magnetic anisotropy aligned in a second direction different from the first direction; and repeating the forming of subsequent metallic layers of the article to form at least a portion of the article, each subsequent metallic layer having the magnetic anisotropy aligned in a different direction than a previous metallic layer.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: July 5, 2022
    Assignee: ABB Schweiz AG
    Inventors: Elio Alberto Perigo, Ion C. Radu, Darren D. Tremelling, Ghanshyam Shrestha
  • Publication number: 20210320602
    Abstract: An apparatus having a first set of windings disposed about a first main leg of a transformer core, and a second set of windings disposed about a second main leg of the transformer core. The first set of windings are electrically coupled to the second set of windings to selectively provide a parallel connection and a series connection between the first set of windings and the second set of windings. Additionally, at least two windings of the first set of windings are electrically coupled to each other to selectively provide a parallel connection and a serial connection between the at least two windings of the first set of windings. Similarly, two windings of the second set of windings are electrically coupled to each other to selectively provide a parallel connection and a serial connection between the at least two windings of the second set of windings.
    Type: Application
    Filed: April 14, 2020
    Publication date: October 14, 2021
    Inventor: Ion C. Radu
  • Publication number: 20210098172
    Abstract: A transformer having a transformer core that forms a magnetic flux path between and through a top yoke, leg, and bottom yoke of the transformer core. A winding can be disposed about the leg. Further, a flitch plate, which can have at least one slot that is configured to reduce eddy losses generated by the winding, can be disposed adjacent to the leg and extend between the top yoke and the bottom yoke. The flitch plate can be clamped to the top and bottom yokes by top and bottom clamps, respectively. The top and bottom clamps can each include at least one cutout that reduces an attraction of stray flux from the winding and into the corresponding top and bottom clamps. Additionally, at least one of the top clamp and the bottom clamp can include an internal lattice structure.
    Type: Application
    Filed: September 26, 2019
    Publication date: April 1, 2021
    Inventors: Ion C. Radu, George K. Frimpong
  • Publication number: 20200108463
    Abstract: A method for additive manufacturing of an article having a controlled magnetic anisotropy includes: forming a metallic layer of the article using additive manufacturing, the metallic layer having a magnetic anisotropy aligned in a first direction; forming a subsequent metallic layer of the article using additive manufacturing, the subsequent metallic layer having the magnetic anisotropy aligned in a second direction different from the first direction; and repeating the forming of subsequent metallic layers of the article to form at least a portion of the article, each subsequent metallic layer having the magnetic anisotropy aligned in a different direction than a previous metallic layer
    Type: Application
    Filed: October 4, 2018
    Publication date: April 9, 2020
    Inventors: Elio Alberto Perigo, Ion C. Radu, Darren D. Tremelling, Ghanshyam Shrestha
  • Patent number: 10483032
    Abstract: Unique systems, methods, techniques and apparatuses of a modular power transformer are disclosed. One exemplary embodiment is a matrix power transformer including a plurality of block assemblies each including a plurality of transformer modules, each transformer module including a primary winding coupled to an input and a secondary winding coupled to an output, the inputs of each transformer module in one block assembly being coupled together and the outputs of each transformer block being coupled together. One of the secondary windings includes a plurality of taps structured to be selectively coupled to the output of the associated transformer module assembly or another secondary winding of the associated module assembly.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: November 19, 2019
    Assignee: ABB Schweiz AG
    Inventors: Alberto Prieto, Ion C. Radu, Nikolaus Zant, Sandeep Bala, Matthew Lee Henriksen, Parag Upadhyay
  • Publication number: 20180308632
    Abstract: Unique systems, methods, techniques and apparatuses of a modular power transformer are disclosed. One exemplary embodiment is a matrix power transformer including a plurality of block assemblies each including a plurality of transformer modules, each transformer module including a primary winding coupled to an input and a secondary winding coupled to an output, the inputs of each transformer module in one block assembly being coupled together and the outputs of each transformer block being coupled together. One of the secondary windings includes a plurality of taps structured to be selectively coupled to the output of the associated transformer module assembly or another secondary winding of the associated module assembly.
    Type: Application
    Filed: April 24, 2018
    Publication date: October 25, 2018
    Inventors: Alberto Prieto, Ion C. Radu, Nikolaus Zant, Sandeep Bala, Matthew Lee Henriksen, Parag Upadhyay