Patents by Inventor Harry H. Chai

Harry H. Chai 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).

  • Integrated inductor windings and heat pipes
    Patent number: 10804023
    Abstract: An inductor includes a printed wiring board (PWB) and a plurality of electrically-conductive heat pipes operatively connected to the PWB. The PWB includes electrically conductive traces electrically connected to the plurality of electrically-conductive heat pipes. The traces and plurality of electrically conductive heat pipes form an inductor winding. A method of manufacturing an inductor includes mounting a plurality of electrically conductive heat pipes to a printed wiring board (PWB), wherein the PWB includes electrically conductive traces to connect the plurality of electrically-conductive heat pipes to form an inductor winding.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: October 13, 2020
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Debabrata Pal, Harry H. Chai, Dwight D. Schmitt, Frank Z. Feng, Charles Shepard
  • INTEGRATED INDUCTOR WINDINGS AND HEAT PIPES
    Publication number: 20180174732
    Abstract: An inductor includes a printed wiring board (PWB) and a plurality of electrically-conductive heat pipes operatively connected to the PWB. The PWB includes electrically conductive traces electrically connected to the plurality of electrically-conductive heat pipes. The traces and plurality of electrically conductive heat pipes form an inductor winding. A method of manufacturing an inductor includes mounting a plurality of electrically conductive heat pipes to a printed wiring board (PWB), wherein the PWB includes electrically conductive traces to connect the plurality of electrically-conductive heat pipes to form an inductor winding.
    Type: Application
    Filed: December 15, 2016
    Publication date: June 21, 2018
    Inventors: Debabrata Pal, Harry H. Chai, Dwight D. Schmitt, Frank Z. Feng, Charles Shepard
  • Topologies and methods for turbine engine start inverters
    Patent number: 9840968
    Abstract: A start inverter for an electric engine start scheme includes an inverter phase leg with solid-state switches and a pulse width modulator operatively connected to the solid-state switches of the inverter phase leg. The pulse width modulator provides command signals to the solid-state switches of the inverter phase leg to invert direct current into alternating current with less ripple than a start inverter with two solid-state switches per phase leg.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: December 12, 2017
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Harry H. Chai, Waleed M. Said
  • TOPOLOGIES AND METHODS FOR TURBINE ENGINE START INVERTERS
    Publication number: 20170074168
    Abstract: A start inverter for an electric engine start scheme includes an inverter phase leg with solid-state switches and a pulse width modulator operatively connected to the solid-state switches of the inverter phase leg. The pulse width modulator provides command signals to the solid-state switches of the inverter phase leg to invert direct current into alternating current with less ripple than a start inverter with two solid-state switches per phase leg.
    Type: Application
    Filed: September 16, 2015
    Publication date: March 16, 2017
    Inventors: Harry H. Chai, Waleed M. Said