Patents by Inventor Lishen Zhou

Lishen Zhou 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).

  • Publication number: 20240364235
    Abstract: In one embodiment, a switching frequency adjusting circuit includes an inverter circuit, a phase difference determining circuit, an average determination circuit, and a loop compensator. The inverter circuit includes an inverter switch configured to switch on and off at a switching frequency. The phase difference determination circuit is configured to obtain a first signal related to an output voltage of the inverter circuit and a second signal related to an output current of the inverter circuit. The average determination circuit is configured to determine a first average value of a first output signal and a second average value of a second output signal, and the loop compensator is configured to compare the first average value or the second average value with a reference value and adjust the switching frequency of the inverter switch based on the comparison result.
    Type: Application
    Filed: March 26, 2024
    Publication date: October 31, 2024
    Inventors: Qixue YU, Ming FU, Lishen ZHOU
  • Publication number: 20240243654
    Abstract: Embodiments of the present disclosure provide methods and apparatus for regulating a converter. The method includes: extracting a ripple voltage in a first frequency band from an input voltage of the converter, the ripple voltage being associated with a ripple component in the input voltage; and regulating a parameter of the converter based on at least the ripple voltage to reduce a ripple component in output of the converter in the first frequency band. The solution of the present disclosure makes it possible to extract the ripple voltage with higher accuracy and to reduce or even eliminate the ripple component of the frequency output by the converter in a cost-effective manner.
    Type: Application
    Filed: December 19, 2023
    Publication date: July 18, 2024
    Inventors: Qixue Yu, Lishen Zhou, Qin Sun
  • Publication number: 20240235265
    Abstract: Embodiments of the present disclosure provide a control method for wireless charging, a wireless charging apparatus and a wireless charging system. The control method includes: controlling a first power converter at a secondary side to charge a chargeable load at a first set current; receiving a sensing signal representing an output current of a second power converter at a primary side; and in response to the output current reaching or exceeding a threshold current, controlling the first power converter to charge the chargeable load at a second set current smaller than the first set current. The scheme of the present disclosure may implement power derating of the wireless charging system and ensure that the primary-side components of the system operate within the safety range.
    Type: Application
    Filed: January 8, 2024
    Publication date: July 11, 2024
    Inventors: Qixue Yu, Lishen Zhou, Qin Sun
  • Publication number: 20240154533
    Abstract: Embodiments of the present disclosure relate to a circuit for limiting duty cycle for a DC switching power supply. The circuit includes: a timing module and a switch control module. The timing module is configured to cause the variable output voltage to increase to a voltage threshold within a time shorter than a duration time of the first level of the period. The switch control module is configured to: in a period having the duty cycle greater than the maximum limit duty cycle, output a signal enabling the switch to be turned on before the variable output voltage increases to the voltage threshold, and output a signal enabling the switch to be turned off independently of the pulse signal after the variable output voltage increases to the voltage threshold. The circuit enables the duty cycle of the switch not to be excessively large during the transition phase.
    Type: Application
    Filed: November 3, 2023
    Publication date: May 9, 2024
    Inventors: Lishen Zhou, Yifeng Sun, Yuan Liu
  • Publication number: 20240129171
    Abstract: Embodiments of the present disclosure relate to signal transmission device, signal transmission method and communication system. The signal transmission device includes: a digital-to-analog converter configured to convert digital signals to analog signals; a modulator configured to modulate the analog signals to generate modulated pulse signals; and a transmitter configured to transmit, based on the modulated pulse signals, output pulse signals to a receiver, wherein the transmitter is configured to have no common ground with the receiver. In the solution in accordance with embodiments of the present disclosure, the high resolution can also be maintained under high speed data transmission, so as to overcome the conflicts between the resolution and the transmission frequency of the digital signal transmission in the existing schemes.
    Type: Application
    Filed: October 17, 2023
    Publication date: April 18, 2024
    Inventors: Lishen Zhou, Qixue Yu, Qin Sun
  • Patent number: 11863078
    Abstract: Devices and methods for DC-to-DC conversion. The device includes a first transformer having a first winding at a primary side and a second winding at a secondary side. The device also includes a second transformer having a third winding at a primary side and a fourth winding at a secondary side. The device includes a controller configured to control a first current in the first winding of the first transformer and a second current in the third winding of the second transformer to flow in a first pattern, and to control the first current and the second current to flow in a second pattern.
    Type: Grant
    Filed: November 29, 2019
    Date of Patent: January 2, 2024
    Assignee: AcLeap Power Inc.
    Inventors: Lishen Zhou, Qixue Yu, Xiaojian Zhao, Yifeng Sun
  • Publication number: 20220376628
    Abstract: Devices and methods for DC-to-DC conversion. The device includes a first transformer having a first winding at a primary side and a second winding at a secondary side. The device also includes a second transformer having a third winding at a primary side and a fourth winding at a secondary side. The device includes a controller configured to control a first current in the first winding of the first transformer and a second current in the third winding of the second transformer to flow in a first pattern, and to control the first current and the second current to flow in a second pattern.
    Type: Application
    Filed: November 29, 2019
    Publication date: November 24, 2022
    Inventors: Lishen Zhou, Qixue Yu, Xiaojian Zhao, Yifeng Sun