Patents by Inventor Zhendong Ji

Zhendong Ji 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).

  • Four-port power electronic transformer based on hybrid modular multilevel converter
    Patent number: 9960666
    Abstract: Disclosed in the present invention is a four-port power electronic transformer based on a hybrid modular multilevel converter (MMCs). The four-port power electronic transformer includes a hybrid MMC, direct current (DC)/DC converters, and an inverter. Each DC/DC converter includes a front stage part, a high frequency transformation part and a back stage part.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: May 1, 2018
    Assignee: Southeast University
    Inventors: Jianfeng Zhao, Dongye Li, Zhendong Ji, Yichao Sun
  • FOUR-PORT POWER ELECTRONIC TRANSFORMER BASED ON HYBRID MODULAR MULTILEVEL CONVERTER
    Publication number: 20180091037
    Abstract: Disclosed in the present invention is a four-port power electronic transformer based on a hybrid modular multilevel converter (MMCs). The four-port power electronic transformer includes a hybrid MMC, direct current (DC)/DC converters, and an inverter. Each DC/DC converter includes a front stage part, a high frequency transformation part and a back stage part.
    Type: Application
    Filed: March 16, 2016
    Publication date: March 29, 2018
    Applicant: Southeast University
    Inventors: Jianfeng ZHAO, Dongye LI, Zhendong JI, Yichao SUN
  • Method, based on composite modulation, of data transmission between power electronic devices without communication line
    Patent number: 9755696
    Abstract: A method of data transmission between power electronic devices without a communication line involves generation of a digital signal in a data transmission process. The digital signal enables PWM modulation of specific data information via a composite modulation method. The composite modulation superimposes PWM modulation waves after modulating the PWM carrier frequency or conducting high-frequency modulation on the data. The composite modulation generates a PWM drive pulse signal which is transmitted to a power circuit via a main power electronic circuit to complete the data transmission process. In the data receiving process, signals are extracted on the voltage and current of a power line via software or hardware, and data demodulated to obtain the data information to complete the data receiving process.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: September 5, 2017
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Jianfeng Zhao, Zhendong Ji, Wei Liu, Yichao Sun
  • METHOD, BASED ON COMPOSITE MODULATION, OF DATA TRANSMISSION BETWEEN POWER ELECTRONIC DEVICES WITHOUT COMMUNICATION LINE
    Publication number: 20170149473
    Abstract: A method of data transmission between power electronic devices without a communication line involves generation of a digital signal in a data transmission process. The digital signal enables PWM modulation of specific data information via a composite modulation method. The composite modulation superimposes PWM modulation waves after modulating the PWM carrier frequency or conducting high-frequency modulation on the data. The composite modulation generates a PWM drive pulse signal which is transmitted to a power circuit via a main power electronic circuit to complete the data transmission process. In the data receiving process, signals are extracted on the voltage and current of a power line via software or hardware, and data demodulated to obtain the data information to complete the data receiving process.
    Type: Application
    Filed: July 15, 2014
    Publication date: May 25, 2017
    Inventors: Jianfeng Zhao, Zhendong Ji, Wei Liu, Yichao Sun