Patents by Inventor Laili WANG
Laili WANG 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: 20250251289Abstract: Disclosed are a system and method for online detection of a junction temperature of a semiconductor device, and a controller. The system includes a controller, an online measurement circuit, and a detection module configured to extract saturated drain current information of a device under test; one end of the online measurement circuit is connected to a drain of the device under test; the other end of the online measurement circuit is connected to a source of the device under test; when the device under test enters a saturation region to operate, an energy storage element in the online measurement circuit spontaneously injects current into the drain of the device under test, so that the drain current of the device under test rises; the controller determines the junction temperature of the device under test according to the saturated drain current information of the device under test extracted by the detection module.Type: ApplicationFiled: July 3, 2024Publication date: August 7, 2025Applicants: Xi'an Jiaotong University, Shaoxing Tongyue Wide Bandgap Semiconductor Research InstituteInventors: Laili WANG, Xiaoliang SHE, Fengtao YANG, Zizhen CHENG, Hang KONG, Zhiqiang ZHAO
-
Patent number: 11532557Abstract: Provided is a planar power module with a spatially interleaved structure, including a top power substrate, a bottom power substrate arranged opposite to the top power substrate, and a plurality of interleaved switch units configured between the top power substrate and the bottom power substrate; wherein adjacent interleaved switch units are electrically connected through a current commutator so that the interleaved switch units form spatial position interleaving. Problems of uneven parallel currents and uneven heat dissipation in the power module are solved.Type: GrantFiled: December 28, 2020Date of Patent: December 20, 2022Assignee: XI'AN JIAOTONG UNIVERSITYInventors: Laili Wang, Fengtao Yang, Wei Mu, Dingkun Ma, Cheng Zhao, Jianpeng Wang
-
Patent number: 11223349Abstract: A joint control method with variable ZVS angles for dynamic efficiency optimization in a WPC system for EVs under ZVS conditions, including: adjusting a phase-shift duty cycle of a secondary active rectifier to control a charging voltage and a charging current of EV's batteries through a charging voltage closed loop and a charging current closed loop, respectively; adjusting a power angle of the secondary active rectifier to control a ZVS angle of the secondary active rectifier through a secondary ZVS angle closed loop; adjusting a phase-shift duty cycle of a primary inverter to control a ZVS angle of the primary inverter through the primary ZVS angle closed loop; determining the current operating case of the WPC system and adjusting the ZVS angles of the primary inverter and the secondary active rectifier to automatically identify an optimal operating point with a maximum charging efficiency through the P&O method.Type: GrantFiled: December 28, 2019Date of Patent: January 11, 2022Assignee: Xi'an Jiaotong UniversityInventors: Yue Wang, Yongbin Jiang, Chenxu Zhao, Ruibang Li, Yonghui Liu, Min Wu, Laili Wang, Xu Yang
-
Publication number: 20210364555Abstract: The present invention provides a current detection circuit applied to a SiC field effect transistor. The current detection circuit includes a current detection loop and an acquisition loop on the current detection loop. The current detection loop includes a voltage source, a capacitor, a first SiC field effect transistor, a second SiC field effect transistor, and a sampling resistor. The first SiC field effect transistor is connected to a power signal. The second SiC field effect transistor is connected to a pulse signal. The acquisition loop includes a compensating resistor and a compensating inductor. The compensating resistor and the compensating inductor are connected in series and then connected in parallel at two ends of the sampling resistor to counteract the influence of total parasitic inductance in the current detection loop.Type: ApplicationFiled: April 1, 2021Publication date: November 25, 2021Inventors: Laili WANG, Chengzi YANG, Huaqing LI, Xingshuo LIU, Longyang YU, Yunqing PEI, Yongmei GAN, Xu YANG
-
Patent number: 11158609Abstract: The present invention relates to a three-dimensional integrated package device for a high-voltage silicon carbide power module, comprising a source substrate, first chip submodules, a first driving terminal, a first driving substrate, a ceramic housing, a metal substrate, a water inlet, a water outlet, second chip submodules, a second driving terminal, a second driving substrate and a drain substrate from top to bottom; and each first chip submodule is composed of a driving connection substrate, a power source metal block, a first driving gate metal post, second driving gate metal posts, a silicon carbide bare chip, an insulation structure and the like. A three-dimensional integrated half-bridge structure is adopted to greatly reduce corresponding parasitic parameters.Type: GrantFiled: May 22, 2020Date of Patent: October 26, 2021Assignee: XI'AN JIAOTONG UNIVERSITYInventors: Laili Wang, Xiaodong Hou, Cheng Zhao, Jianpeng Wang, Dingkun Ma, Chengzi Yang, Xu Yang
-
Publication number: 20210202386Abstract: Provided is a planar power module with a spatially interleaved structure, including a top power substrate, a bottom power substrate arranged opposite to the top power substrate, and a plurality of interleaved switch units configured between the top power substrate and the bottom power substrate; wherein adjacent interleaved switch units are electrically connected through a current commutator so that the interleaved switch units form spatial position interleaving. Problems of uneven parallel currents and uneven heat dissipation in the power module are solved.Type: ApplicationFiled: December 28, 2020Publication date: July 1, 2021Inventors: Laili WANG, Fengtao YANG, Wei MU, Dingkun MA, Cheng ZHAO, Jianpeng WANG
-
Patent number: 11043850Abstract: The present invention discloses a current phase locking and driver pulse generation method for wireless charging for electric vehicles. By monitoring the resonant current iL2 of the receiving coil, the proposed method generates the synchronization signal accurately based on the phase of the current iL2. Moreover, it controls the phases of driver pulses of switching transistors according to the synchronization signal so as to control the turn-on moment and turn-off moment of the switching transistors in the secondary rectifier. As a result, by using the proposed method, the pulse losing of the switching transistors in the secondary active rectifier can be avoided; the stable and reliable phase locking of the high-frequency resonant current and generation of driver pulses can be achieved; the anti-interference capability can be greatly enhanced, and the stability and reliability of the wireless charging system for electric vehicles can also be improved.Type: GrantFiled: December 28, 2019Date of Patent: June 22, 2021Assignee: Xi'an Jiaotong UniversityInventors: Laili Wang, Yongbin Jiang, Ruibang Li, Yonghui Liu, Min Wu, Jing Sun, Zexian Zeng, Yue Wang, Xu Yang
-
Publication number: 20210135666Abstract: A joint control method with variable ZVS angles for dynamic efficiency optimization in a WPC system for EVs under ZVS conditions, including: adjusting a phase-shift duty cycle of a secondary active rectifier to control a charging voltage and a charging current of EV's batteries through a charging voltage closed loop and a charging current closed loop, respectively; adjusting a power angle of the secondary active rectifier to control a ZVS angle of the secondary active rectifier through a secondary ZVS angle closed loop; adjusting a phase-shift duty cycle of a primary inverter to control a ZVS angle of the primary inverter through the primary ZVS angle closed loop; determining the current operating case of the WPC system and adjusting the ZVS angles of the primary inverter and the secondary active rectifier to automatically identify an optimal operating point with a maximum charging efficiency through the P&O method.Type: ApplicationFiled: December 28, 2019Publication date: May 6, 2021Inventors: Yue WANG, Yongbin JIANG, Chenxu ZHAO, Ruibang LI, Yonghui LIU, Min WU, Laili WANG, Xu YANG
-
Publication number: 20200388595Abstract: The present invention relates to a three-dimensional integrated package device for a high-voltage silicon carbide power module, comprising a source substrate, first chip submodules, a first driving terminal, a first driving substrate, a ceramic housing, a metal substrate, a water inlet, a water outlet, second chip submodules, a second driving terminal, a second driving substrate and a drain substrate from top to bottom; and each first chip submodule is composed of a driving connection substrate, a power source metal block, a first driving gate metal post, second driving gate metal posts, a silicon carbide bare chip, an insulation structure and the like. A three-dimensional integrated half-bridge structure is adopted to greatly reduce corresponding parasitic parameters.Type: ApplicationFiled: May 22, 2020Publication date: December 10, 2020Inventors: Laili WANG, Xiaodong HOU, Cheng ZHAO, Jianpeng WANG, Dingkun MA, Chengzi YANG, Xu YANG
-
Publication number: 20200381945Abstract: The present invention discloses a current phase locking and driver pulse generation method for wireless charging for electric vehicles. By monitoring the resonant current iL2 of the receiving coil, the proposed method generates the synchronization signal accurately based on the phase of the current iL2. Moreover, it controls the phases of driver pulses of switching transistors according to the synchronization signal so as to control the turn-on moment and turn-off moment of the switching transistors in the secondary rectifier. As a result, by using the proposed method, the pulse losing of the switching transistors in the secondary active rectifier can be avoided; the stable and reliable phase locking of the high-frequency resonant current and generation of driver pulses can be achieved; the anti-interference capability can be greatly enhanced, and the stability and reliability of the wireless charging system for electric vehicles can also be improved.Type: ApplicationFiled: December 28, 2019Publication date: December 3, 2020Inventors: Laili WANG, Yongbin JIANG, Ruibang LI, Yonghui LIU, Min WU, Jing SUN, Zexian ZENG, Yue WANG, Xu YANG
-
Patent number: 10693382Abstract: A miniature fast charging and discharging circuit, including a power supply, a pre-stage boost auxiliary circuit, a bidirectional flyback circuit and an output capacitor. Input and output terminals of the pre-stage boost auxiliary circuit are respectively connected to the power supply and an input terminal of the bidirectional flyback circuit. The output capacitor is an output terminal of the bidirectional flyback circuit. The pre-stage boost auxiliary circuit includes a third switching MOSFET and a primary high-voltage storage capacitor connected in parallel with the power supply. When energy of the bidirectional flyback circuit reversely flows, the current cannot flow from the drain to the source, the current is stored in the primary high-voltage storage capacitor.Type: GrantFiled: April 19, 2019Date of Patent: June 23, 2020Assignee: Xi'an Jiaotong UniversityInventors: Laili Wang, Yang Chen, Mofan Tian
-
Publication number: 20190326825Abstract: A miniature fast charging and discharging circuit, including a power supply, a pre-stage boost auxiliary circuit, a bidirectional flyback circuit and an output capacitor. Input and output terminals of the pre-stage boost auxiliary circuit are respectively connected to the power supply and an input terminal of the bidirectional flyback circuit. The output capacitor is an output terminal of the bidirectional flyback circuit. The pre-stage boost auxiliary circuit includes a third switching MOSFET and a primary high-voltage storage capacitor connected in parallel with the power supply. When energy of the bidirectional flyback circuit reversely flows, the current cannot flow from the drain to the source, the current is stored in the primary high-voltage storage capacitor.Type: ApplicationFiled: April 19, 2019Publication date: October 24, 2019Inventors: Laili WANG, Yang CHEN, Mofan TIAN