Patents by Inventor Fengchun He

Fengchun He 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: 20250075441
    Abstract: A top-down construction type assembly construction method for paved road surface, including the following steps: step I, manufacturing prefabricating slabs: using a top-down method to manufacture the prefabricating slabs, and providing bolt sleeves, inside the prefabricating slabs, which are evenly arranged in the prefabricating slabs; step II, mounting the prefabricating slabs: on a lower bearing plate, placing the prefabricating slabs in one step, performing a fine tuning on a position and an altitude of the prefabricating slabs, performing a grouting construction, finally forming the paved road surface; the prefabricating slabs are manufactured by laying bricks and pouring concrete, the prefabricating slabs are rolled over and mounted, thus eliminating on-site concrete bonding between bricks and the lower bearing plate, improving overall stability of the bricks and the prefabricating slabs after being mounted, assembled mounting for a paved road surface is implemented, and the construction period is shorte
    Type: Application
    Filed: October 28, 2024
    Publication date: March 6, 2025
    Inventors: Jiesheng ZHANG, Yangjie JIANG, Fengchun DONG, Wu HUANG, Anhui WANG, Shengyun HE, Jingyi LI, Shijun PI, Lingjian KONG, Ning ZHAO, Zhuoyi WEI, Shuguo XU, Ying WANG, Can JIANG, Bo ZHANG
  • Patent number: 12088195
    Abstract: A resonant converter has a primary resonant tank circuit and a secondary resonant tank circuit. An inverter circuit converts an input DC voltage received by the resonant converter at an input voltage node to a pulsating signal that is fed to the primary resonant tank circuit to generate a resonant tank current that flows through a primary winding of a transformer. The resonant tank current induces current in a secondary winding of the transformer. The induced current is rectified by a rectifier and the rectified signal is filtered to generate an output DC voltage at an output voltage node. The secondary resonant tank circuit is disposed between the secondary winding of the transformer and the output voltage node, and a tank node of the secondary resonant tank is connected to the primary resonant tank circuit through the inverter circuit.
    Type: Grant
    Filed: November 6, 2023
    Date of Patent: September 10, 2024
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Junjie Feng, Xu Han, Fengchun He, Daocheng Huang, Yuhang Sun
  • Publication number: 20240145334
    Abstract: A power module has a substrate, a magnetic component disposed on the substrate, a plurality of power integrated circuits (ICs), and a heat spreader. The heat spreader and at least a part of the plurality of power ICs are disposed on a top surface of the substrate. The heat spreader is fixed on the substrate through a structural adhesive, covering top surfaces of the part of the plurality of power ICs on the top surface of the substrate, and is in contact with the top surfaces of the part of the plurality of power ICs on the top surface of the substrate through a thermal conductive adhesive. A difference between a height measured from a topmost surface of the magnetic component to the top surface of the substrate and a height measured from a topmost surface of the heat spreader to the top surface of the substrate is within 300 um.
    Type: Application
    Filed: January 10, 2024
    Publication date: May 2, 2024
    Inventors: Fengchun He, Daocheng Huang, Junjie Feng, Xu Han
  • Publication number: 20240072653
    Abstract: A resonant converter has a primary resonant tank circuit and a secondary resonant tank circuit. An inverter circuit converts an input DC voltage received by the resonant converter at an input voltage node to a pulsating signal that is fed to the primary resonant tank circuit to generate a resonant tank current that flows through a primary winding of a transformer. The resonant tank current induces current in a secondary winding of the transformer. The induced current is rectified by a rectifier and the rectified signal is filtered to generate an output DC voltage at an output voltage node. The secondary resonant tank circuit is disposed between the secondary winding of the transformer and the output voltage node, and a tank node of the secondary resonant tank is connected to the primary resonant tank circuit through the inverter circuit.
    Type: Application
    Filed: November 6, 2023
    Publication date: February 29, 2024
    Inventors: Junjie FENG, Xu HAN, Fengchun HE, Daocheng HUANG, Yuhang SUN
  • Patent number: 11855530
    Abstract: A resonant converter has a primary resonant tank circuit and a secondary resonant tank circuit. An inverter circuit converts an input DC voltage received by the resonant converter at an input voltage node to a pulsating signal that is fed to the primary resonant tank circuit to generate a resonant tank current that flows through a primary winding of a transformer. The resonant tank current induces current in a secondary winding of the transformer. The induced current is rectified by a rectifier and the rectified signal is filtered by an output capacitor to generate an output DC voltage at an output voltage node. The secondary resonant tank circuit is disposed between the input voltage node and the output voltage node to inject odd order harmonics of the operating frequency to the primary tank circuit to shape the resonant tank current.
    Type: Grant
    Filed: August 5, 2022
    Date of Patent: December 26, 2023
    Assignee: MONOLITHIC POWER SYSTEMS, INC.
    Inventors: Junjie Feng, Xu Han, Fengchun He, Daocheng Huang, Yuhang Sun