Patents by Inventor Deyong ZHAO

Deyong ZHAO 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).

  • Active neutral point clamped inverter, zero-crossing switching method and zero-crossing switching apparatus thereof
    Patent number: 10355618
    Abstract: An ANPC inverter, a zero-crossing switching method and a zero-crossing switching apparatus of the ANPC inverter are provided. The method includes: controlling switch states of switch devices in a bridge leg to change according to a preset logic when zero-crossing switching occurs in an output voltage instruction of the bridge leg, so as to prevent overvoltage in the switch device in the bridge leg. The preset logic includes switching among a sequence of switch state combinations. Switch state combinations of the switch devices before and after the zero-crossing switching occurs are defined as the first and second switch state combinations of the sequence. The second to the penultimate switch state combinations are all safe switch state combinations selected in advance, in each of which a maximum voltage borne by the switch devices in the bridge leg is clamped to a safe limit value.
    Type: Grant
    Filed: April 11, 2018
    Date of Patent: July 16, 2019
    Assignee: SUNGROW POWER SUPPLY CO., LTD.
    Inventors: Jiacai Zhuang, Yuqing Cui, Deyong Zhao, Xiaohui Luo, Chaoxuan Zhang, Jun Xu, Yilei Gu, Xinyu Wang
  • Active Neutral Point Clamped Inverter, Zero-Crossing Switching Method And Zero-Crossing Switching Apparatus Thereof
    Publication number: 20180316276
    Abstract: An ANPC inverter, a zero-crossing switching method and a zero-crossing switching apparatus of the ANPC inverter are provided. The method includes: controlling switch states of switch devices in a bridge leg to change according to a preset logic when zero-crossing switching occurs in an output voltage instruction of the bridge leg, so as to prevent overvoltage in the switch device in the bridge leg. The preset logic includes switching among a sequence of switch state combinations. Switch state combinations of the switch devices before and after the zero-crossing switching occurs are defined as the first and second switch state combinations of the sequence. The second to the penultimate switch state combinations are all safe switch state combinations selected in advance, in each of which a maximum voltage borne by the switch devices in the bridge leg is clamped to a safe limit value.
    Type: Application
    Filed: April 11, 2018
    Publication date: November 1, 2018
    Applicant: SUNGROW POWER SUPPLY CO., LTD.
    Inventors: Jiacai ZHUANG, Yuqing CUI, Deyong ZHAO, Xiaohui LUO, Chaoxuan ZHANG, Jun XU, Yilei GU, Xinyu WANG