Patents by Inventor Hui-Chung Hsieh

Hui-Chung Hsieh 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).

  • Power conversion device and control method for voltage equalization
    Patent number: 11239759
    Abstract: A control method includes the following operations: combining multiple output voltages into a total output voltage; generating a first switching frequency based on a first voltage difference, and generating at least one offset frequency based on at least one second voltage difference; generating at least one second switching frequency according to the at least one offset frequency and the first switching frequency; and generating a first set of switching signals according to the first switching frequency, and generating at least one second set of switching signals according to the at least one second switching frequency to respectively control a switching element of the resonant converter circuits.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: February 1, 2022
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Chi-Lung Hsiao, Hui-Chung Hsieh
  • POWER CONVERSION DEVICE AND CONTROL METHOD
    Publication number: 20200336072
    Abstract: A control method includes the following operations: combining multiple output voltages into a total output voltage; generating a first switching frequency based on a first voltage difference, and generating at least one offset frequency based on at least one second voltage difference; generating at least one second switching frequency according to the at least one offset frequency and the first switching frequency; and generating a first set of switching signals according to the first switching frequency, and generating at least one second set of switching signals according to the at least one second switching frequency to respectively control a switching element of the resonant converter circuits.
    Type: Application
    Filed: April 13, 2020
    Publication date: October 22, 2020
    Inventors: Chi-Lung HSIAO, Hui-Chung HSIEH
  • Variable frequency drive and rotation speed searching apparatus for an induction motor
    Patent number: 8653781
    Abstract: Provided is a variable frequency drive and a rotation speed searching apparatus for an induction motor incorporated therein. The rotation speed searching apparatus is featured by scanning the rotor frequency of the induction motor and determining either the error between a detected DC-bus voltage and a set DC-bus voltage or the error between a detected output current and a set output current, so that the rotation speed of the induction motor can be searched out.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: February 18, 2014
    Assignee: Delta Electronics, Inc.
    Inventors: Hui-Chung Hsieh, Chi-Lung Hsiao
  • VARIABLE FREQUENCE DRIVE AND ROTATION SPEED SEARCHING APPARATUS FOR AN INDUCTION MOTOR
    Publication number: 20120242273
    Abstract: Provided is a variable frequency drive and a rotation speed searching apparatus for an induction motor incorporated therein. The rotation speed searching apparatus is featured by scanning the rotor frequency of the induction motor and determining either the error between a detected DC-bus voltage and a set DC-bus voltage or the error between a detected output current and a set output current, so that the rotation speed of the induction motor can be searched out.
    Type: Application
    Filed: September 21, 2011
    Publication date: September 27, 2012
    Applicant: DELTA ELECTRONICS, INC.
    Inventors: Hui-Chung Hsieh, Chi-lung Hsiao