公开(公告)号：US12088215B2

公开(公告)日：2024-09-10

申请号：US18634713

申请日：2024-04-12

Applicant: SOUTHEAST UNIVERSITY

Inventor： Huafeng Xiao ,  Xiaobiao Wang

IPC: H02M7/487 ,  H02M1/00 ,  H02M1/088 ,  H02M7/5387

CPC classification number: H02M7/487 ,  H02M1/0054 ,  H02M1/088 ,  H02M7/5387

Abstract: Disclosed are a modulation strategy suitable for balancing losses of power switches in a bridge arm of a neutral point clamped three level inverter and an implementation method. The modulation strategy includes that an operation type of an inverter is determined and a corresponding modulation style is selected on the basis of a power factor (PF) angle; a corresponding modulation interval is selected according to the modulation style; and drive signals for various power switches are outputted, to balance switching losses of inner and outer sides of a bridge arm. The modulation strategy of the present disclosure enables the rational utilization of freewheeling paths to achieve a balanced distribution of losses between the inner and outer power switches of the inverter bridge within the entire PF range, thereby prolonging the service life of power electronic devices.

公开(公告)号：US20240280456A1

公开(公告)日：2024-08-22

申请号：US17928309

申请日：2022-05-31

Applicant: SOUTHEAST UNIVERSITY

Inventor： Zhisong XU ,  Jiaping LIU ,  Shijun YUAN ,  Ming JIN

IPC: G01N11/14 ,  G01N33/38

CPC classification number: G01N11/14 ,  G01N33/383

Abstract: A testing device for a characteristic of resistance between fresh concrete and a boundary, and a testing method includes a counter-force frame, a driving mechanism, an outer cylinder, a rotor, and pressurization mechanisms, where a bottom of an inner side of the counter-force frame is provided with the driving mechanism, an output shaft of the driving mechanism is connected to the rotor, the rotor is placed in the outer cylinder, space between the rotor and the outer cylinder is filled with a concrete specimen, a plurality of pressurization mechanisms are symmetrically arranged at a top of the concrete specimen, tail ends of the pressurization mechanisms are mounted on the counter-force frame, and the pressurization mechanisms, the rotor and the driving mechanism are connected to a data receiver.

公开(公告)号：US12064884B2

公开(公告)日：2024-08-20

申请号：US17774317

申请日：2022-01-06

Applicant: SOUTHEAST UNIVERSITY

Inventor： Aiguo Song ,  Jianwei Lai ,  Huijun Li ,  Hong Zeng ,  Baoguo Xu

IPC: B25J9/16

CPC classification number: B25J9/1692

Abstract: The present disclosure discloses an automated calibration system and calibration method for a flexible robot actuator. The calibration system includes a support frame. A visual positioning system, a pressure measuring system and a pneumatic pressure control system are respectively installed on the support frame. The visual positioning system is configured to measure a relative displacement and an angle between two ends of the flexible actuator. The pneumatic pressure control system is configured to charge air into an actuating end of the flexible actuator and measure an input pneumatic pressure of the flexible actuator. The pressure measuring system includes a pressure gauge installed on the support frame through a vertical axis motor system, and the flexible actuator to be calibrated installed on the support frame through a horizontal axis motor system and a rotating motor system. The rotating motor system is installed on the support frame through the horizontal axis motor system, the actuating end of the flexible actuator is fixed on the rotating motor system, and a free end of the flexible actuator is in contact with a measuring end of the pressure gauge to carry out pressure measurement. The calibration system is high in accuracy and simple to use.

公开(公告)号：US12061854B1

公开(公告)日：2024-08-13

申请号：US18571727

申请日：2023-01-03

Applicant: SOUTHEAST UNIVERSITY

Inventor： Peng Cao ,  Qianqian Song ,  Kai Wang

IPC: G06F30/30 ,  G06F30/337 ,  G06F119/06

CPC classification number: G06F30/337 ,  G06F2119/06

Abstract: An optimization method for a digital integrated circuit is provided. Under the precondition of satisfying certain timing constraints, circuit-level, path-level and gate cell-level features of a circuit are extracted to construct a leakage power optimization model, and optimization data from commercial circuit optimization tools is used to train the model to predict voltage threshold types of gate cells after circuit optimization, such that the circuit can be optimized by adjusting voltage thresholds of gate cells in a post-routing gate-level netlist, thus realizing the optimization objective of reducing leakage power.

公开(公告)号：US20240266430A1

公开(公告)日：2024-08-08

申请号：US18577714

申请日：2022-12-29

Applicant: SOUTHEAST UNIVERSITY

Inventor： Long ZHANG ,  Weifeng SUN ,  Siyang LIU ,  Jie MA ,  Peigang LIU ,  Longxing SHI

IPC: H01L29/778 ,  H01L29/10 ,  H01L29/20 ,  H01L29/207

CPC classification number: H01L29/7787 ,  H01L29/1066 ,  H01L29/2003 ,  H01L29/207

Abstract: An enhancement-mode N-channel and P-channel GaN device integration structure comprises a substrate, wherein an Al—N nucleating layer, an AlGaN buffer layer, a GaN channel layer and an AlGaN barrier layer are sequentially arranged on the substrate, and the AlGaN barrier layer and the GaN channel layer are divided by an isolation layer; a P-channel device is arranged on one side of the isolation layer and comprises a first P-GaN layer, a first GaN isolation layer and a first P+-GaN layer are sequentially arranged on the first P-GaN layer, a first source, a first gate and a first drain are arranged on the first P+-GaN layer, the first gate is inlaid in the first P+-GaN layer, and a gate dielectric layer is arranged between the first gate and the first P+-GaN layer; and an N-channel device is arranged on the other side of the isolation layer.

公开(公告)号：US20240257438A1

公开(公告)日：2024-08-01

申请号：US18563997

申请日：2023-04-06

Applicant: Southeast University

Inventor： Chengxiang WANG ,  Jialing HUANG ,  Yingzhuo SUN ,  Jie HUANG ,  Fuchun ZHENG

IPC: G06T15/06

CPC classification number: G06T15/06

Abstract: Disclosed in the present disclosure is a ray tracing channel modeling method for reconfigurable intelligent surface wireless communication. The method comprises: setting an application scene; implementing RIS deployment and adjustment mode; analyzing a received power distribution of a non-line-of-sight scene; analyzing an angle power spectral density; and specifically analyzing the change of a channel capacity with the change of a transmitting power, a RIS unit number and a RIS deployment position. In the present disclosure, a RIS channel deterministic model based on ray tracing can be used for a static ray tracing simulation software, the deployment of any scale of a reconfigurable intelligent surface at any position in a scene is supported, the ray tracing modeling method of the reconfigurable intelligent surface is enriched, and the channel characteristic analysis of the simulation result has guiding significance for the application and deployment of RIS in indoor scenes.

公开(公告)号：US12051742B1

公开(公告)日：2024-07-30

申请号：US18577714

申请日：2022-12-29

Applicant: SOUTHEAST UNIVERSITY

Inventor： Long Zhang ,  Weifeng Sun ,  Siyang Liu ,  Jie Ma ,  Peigang Liu ,  Longxing Shi

IPC: H01L29/778 ,  H01L29/10 ,  H01L29/20 ,  H01L29/207 ,  H01L29/66

CPC classification number: H01L29/7787 ,  H01L29/1066 ,  H01L29/2003 ,  H01L29/207 ,  H01L29/66431 ,  H01L29/66462 ,  H01L29/7783

Abstract: An enhancement-mode N-channel and P-channel GaN device integration structure comprises a substrate, wherein an Al—N nucleating layer, an AlGaN buffer layer, a GaN channel layer and an AlGaN barrier layer are sequentially arranged on the substrate, and the AlGaN barrier layer and the GaN channel layer are divided by an isolation layer; a P-channel device is arranged on one side of the isolation layer and comprises a first P-GaN layer, a first GaN isolation layer and a first P+-GaN layer are sequentially arranged on the first P-GaN layer, a first source, a first gate and a first drain are arranged on the first P+-GaN layer, the first gate is inlaid in the first P+-GaN layer, and a gate dielectric layer is arranged between the first gate and the first P+-GaN layer; and an N-channel device is arranged on the other side of the isolation layer.

公开(公告)号：US12027516B1

公开(公告)日：2024-07-02

申请号：US18568277

申请日：2022-12-29

Applicant: SOUTHEAST UNIVERSITY

Inventor： Siyang Liu ,  Sheng Li ,  Chi Zhang ,  Weifeng Sun ,  Mengli Liu ,  Yanfeng Ma ,  Longxing Shi

IPC: H01L29/778 ,  H01L27/06 ,  H01L29/20 ,  H01L49/02

CPC classification number: H01L27/0629 ,  H01L28/20 ,  H01L29/2003 ,  H01L29/7786 ,  H01L29/7787

Abstract: A GaN power semiconductor device integrated with a self-feedback gate control structure comprises a substrate, a buffer layer, a channel layer and a barrier layer. A gate control area is formed by a first metal source electrode, a first P-type GaN cap layer, a first metal gate electrode, a first metal drain electrode, a second P-type GaN cap layer and a second metal gate electrode. An active working area is formed by the first metal source electrode, a third P-type GaN cap layer, a third metal gate electrode, a second metal drain electrode, the second P-type GaN cap layer and a second metal source electrode. The overall gate leaking current of the device is regulated by the gate control area, the integration level is high, the parasitic effect is small, and the charge-storage effect can be effectively relieved, thus improving the threshold stability of the device.

公开(公告)号：US20240094072A1

公开(公告)日：2024-03-21

申请号：US18025186

申请日：2022-05-12

Applicant: SOUTHEAST UNIVERSITY

Inventor： Aiguo SONG ,  Jingjing XU ,  Shuyan YANG ,  Baoguo XU ,  Huijun LI ,  Ruqi MA

IPC: G01L1/18 ,  G01L5/1627

CPC classification number: G01L1/18 ,  G01L5/1627

Abstract: A miniature combined multi-axis force sensor structure includes a sensor body, a first shell and a second shell, two horizontal main beams and two vertical main beams are arranged on the periphery of an inner round platform in a cross shape, tail ends of the horizontal main beams and the vertical main beams are each connected to a vertical floating beam, and the horizontal floating beams consist of two thin-walled cambered beams; two ends of the horizontal floating beam are each connected to an outer round platform by means of an annular platform; the sensor body is arranged between the first shell and the second shell; strain gauges are stuck on the horizontal main beams and the vertical main beams to form two Wheatstone bridges; and when force/torque acts on the cross beam, the sensor deforms, and the resistance value of strain gauge at corresponding position changes.

公开(公告)号：US20240084463A1

公开(公告)日：2024-03-14

申请号：US18550629

申请日：2023-01-04

Applicant: SOUTHEAST UNIVERSITY

Inventor： Rui XIAO ,  Chao LIU ,  Tao LI ,  Weicong XU ,  Peijun LI ,  Feng GONG

IPC: C25B3/26 ,  C25B15/08

CPC classification number: C25B3/26 ,  C25B15/087

Abstract: A system and method for CO2 capture and electroregeneration and synchronous conversion are provided. The system includes a CO2 capture subsystem, which uses an absorption liquid to capture CO2 and generate a capture liquid; and a CO2 electroregeneration and synchronous conversion subsystem, including a cathode chamber provided with a cathode electrode, a sample inlet, and a sample outlet, an anode chamber having an anode electrode, a sample inlet connected to an outlet of the capture liquid of the CO2 capture subsystem, and a sample outlet connected to the sample inlet of the cathode chamber for introducing CO2 regenerated by anodic oxidation into the cathode chamber for electroreduction, and a balance chamber in the middle having a sample outlet connected to an inlet of the absorption liquid of the CO2 capture subsystem. The system can perform self-circulation and stably operate, to capture, regenerate and convert CO2.