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公开(公告)号：US11505997B2
公开(公告)日：2022-11-22
申请号：US17485712
申请日：2021-09-27
发明人： Buyan Wan , Yongping Jin , Fenfei Peng , Jialiang Wang , Huan Liu
摘要： A horizontal drilling machine with an in-situ detection device, including a support frame, an armored cable, a steel pipe-straightening mechanism, a steel pipe-feeding mechanism, a motor, a power head, a drill pipe, a rotating chuck, a damper, a non-core drilling tool, the in-situ detection device, a fishing device and a thrust cylinder. The steel pipe-straightening mechanism, the steel pipe-feeding mechanism, the rotating chuck and the damper are sequentially fixed on the support frame from left to right. One end of the thrust cylinder is hinged with the support frame, and the other end is connected to the power head. The active drill pipe of the power head is connected to the drill pipe. An end of the armored cable is connected to the fishing device in the drill pipe, and the fishing head of the fishing device is connected to the spearhead of the non-core drilling tool.
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公开(公告)号：US20220368133A1
公开(公告)日：2022-11-17
申请号：US17873855
申请日：2022-07-26
申请人： Hunan University
发明人： Yunfeng WEN , Wuqi ZHANG , Wei GUO
IPC分类号： H02J3/24
摘要： A method and a system for evaluating inertia of a power system and a storage medium. The method includes: injecting a cosine active power disturbance into the power system by small-disturbance injection, and obtaining frequency response at a node where the disturbance is injected, where the active power disturbance can be an energy storage, wind power, or photovoltaic power; acquiring an evaluation framework of inertia and frequency regulation capability of the power system according to relative characteristics of a frequency response function; and constructing a mathematical relationship between the impedance and frequency response characteristics according to a relationship among active power disturbance, frequency fluctuation and impedance.
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公开(公告)号：US20220302812A1
公开(公告)日：2022-09-22
申请号：US17456531
申请日：2021-11-24
发明人： Xiaoping ZHANG , Donghao LIU , Bo FU
摘要： To solve the problem of large electromagnetic noise in AC traction motor, embodiments have open square notches at symmetrical positions on both sides of stator teeth of AC traction motor to effectively reduce electromagnetic noise without affecting other performance indicators of motor. In addition, embodiments fit the functional relationship between the optimal notch size or optimal slotting position size of motors and their power by determining the optimal notch size or optimal slotting position size of motors with different power grades, so as to achieve the noise reduction effect.
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公开(公告)号：US20220236159A1
公开(公告)日：2022-07-28
申请号：US17719326
申请日：2022-04-12
发明人： Yongping JIN , Zhaodong TONG , Buyan WAN
IPC分类号： G01N3/56
摘要： A friction and wear testing platform capable of simulating high-pressure, silt-containing and turbid submarine environment, including a tank, a loading device, a partition plate, a partition cylinder, a top sealing sleeve, a bottom sealing sleeve, a rotating shaft, an inner magnetic cylinder, an outer magnetic cylinder and a centering table. The partition plate and the partition cylinder divide an inner chamber of the tank into a test chamber and a pressure compensation chamber. The rotating shaft penetrates the pressure compensation chamber; two ends of the rotating shaft are sealed by the top and bottom sealing sleeves, respectively, as well as sealing bearings and rings therein. The loading device drives the rotating shaft to rotate, and the rotating shaft drives the inner magnetic cylinder to rotate. The centering table is driven through the magnetic coupling between the inner and outer magnetic cylinders to install a test piece.
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公开(公告)号：US11371298B2
公开(公告)日：2022-06-28
申请号：US16876737
申请日：2020-05-18
发明人： Buyan Wan , Yongping Jin , Deshun Liu , Xiaojun Huang
IPC分类号： E21B19/14
摘要： A support device for the rotation of a high-capacity and compact drill pipe storage unit of a seabed drilling rig in a lying state, including: a rack, a plurality of curved support frames, a plurality of lateral drill pipe stoppers and a plurality of annular fences. The curved support frames are provided parallelly and coaxially on a slideway of the rack. A separating plate is provided on each of the curved support frames. A curved support surface of each of the curved support frames is in contact with a circular edge surface of the corresponding separating plate. The annular fences are mounted on the rack. Each of the annular fences is provided with a first gap and a second gap. The first gap is provided corresponding to the lateral drill pipe stopper. The second gap is configured to allow the drill pipes enter and exit the drill pipe storage unit.
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126.发明申请公开(公告)号：US20220178790A1
公开(公告)日：2022-06-09
申请号：US17677017
申请日：2022-02-22
发明人： Shuyi YANG , Lili LIAO , Lingyun QIN , Shixiong TANG , Dong AO , Juchuan DAI , Qihui LING , Yong GUO , Zhewu CHEN , Hongzhou LI
IPC分类号： G01M17/04
摘要： A system for integratedly testing damping performance of a hydro-pneumatic suspension vehicle, including a testing platform and a testing device. The testing device includes a sensor module, a data acquiring and processing module and a testing software. A method for integratedly testing damping performance of a hydro-pneumatic suspension vehicle is also provided. A calculation is performed by a testing software to optimize a sensor configuration. A signal is acquired and transmitted by the sensor module. The signal is acquired and processed by a data acquiring and processing module, and displayed and analyzed by the testing software.
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公开(公告)号：US11319675B2
公开(公告)日：2022-05-03
申请号：US16943756
申请日：2020-07-30
申请人： Hunan University
发明人： Jianfeng Wang , Fanzhan Zeng , Guang Xiao
IPC分类号： D21H27/00 , D21D5/00 , D21F11/00 , D21H13/26 , D21H17/67 , D21H17/68 , D21H21/34 , D21H23/04
摘要： The present invention provides an aramid nanofiber (ANF)-based insulation paper and a preparation method thereof, and relates to the technical field of composite insulation material. The ANF-based insulation paper provided in the present invention includes ANFs and inorganic insulation materials. The ANFs have a bifurcated geometry and form a three-dimensional network structure, and the inorganic insulation materials are distributed in the three-dimensional network structure. The ANF paper provided in the present invention, with optimal electrical and mechanical properties and excellent insulation and flame-resistance, can replace mica tapes, aramid papers and aramid mica papers on the current market for insulation, and thus the thickness for insulation can be reduced. The present invention provides a method for preparing the ANF-based insulation paper. The preparation method provided in the present invention is simple, has excellent operability, and can be used for continuous preparation, thereby facilitating the realization of industrial production.
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公开(公告)号：US11264933B2
公开(公告)日：2022-03-01
申请号：US17163980
申请日：2021-02-01
发明人： Xiaoping Zhang , Sijian Kuang , Ping Liu , Zhu Zhang , Haipeng Jiang , Shaowu Zhou
IPC分类号： H02P25/089
摘要： A sensorless control method and an apparatus for a three-phase switched reluctance motor. The sensorless control method obtains line inductances of three phases according to real-time phase inductances of the three-phase switched reluctance motor and then determines feature points of the line inductances of the three phases. A position angle of the rotor at any time in the next corresponding region is calculated according to an average rotation speed of the rotor in the region corresponding to two adjacent feature points. A control signal is output to realize a precise sensorless control for the three-phase switched reluctance motor. The control apparatus includes a microcontroller, a power conversion circuit, a drive module for the power conversion circuit, a current detection module, a voltage detection module, an input and output module and a direct current regulated power supply.
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129.发明申请公开(公告)号：US20220010640A1
公开(公告)日：2022-01-13
申请号：US17485861
申请日：2021-09-27
发明人： Buyan WAN , Yongping JIN , Fenfei PENG , Jialiang WANG , Huan LIU
摘要： A long-distance core drilling method suitable for a horizontal geological core drilling rig. (1) An active drill rod is connected to a drill rod, which is connected to a wireline-coring outer-tube drilling tool. (2) A steel-pipe string is connected to a fishing device, and the fishing device is connected to a spearhead on a core tube, which is placed to a designated position through a pipe-feeding mechanism. (3) A washing pump is started. (4) A core drilling is carried out. (5) A core is pulled out. (6) The steel-pipe string and the fishing device are reconnected. (7) The core tube is salvaged. (8) The core tube and drill pipe are replaced. (9) A hole is swept. (10) Steps (1)-(9) are repeated until the hole is drilled to a designated depth. (11) The core tube and the wireline-coring outer-tube drilling tool are recovered.
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公开(公告)号：US11201542B2
公开(公告)日：2021-12-14
申请号：US17096766
申请日：2020-11-12
发明人： Xiaoping Zhang , Ruirui Zhang , Zhi Wu
IPC分类号： H02M3/156
摘要： Disclosed a method for determining a stability range of control parameters of a Buck-Boost converter based on segmented delay feedback control, including by taking inductor current and capacitor current in a Buck-Boost converter as state variables, establishing state differential equations respectively for two different level states of the converter under the pulse input voltage; based on different input voltages, correcting inductor reference current to obtain novel inductor reference current; based on the state differential equations and the novel inductor reference current, obtaining a discrete iteration mapping model of a system; based on the discrete iteration mapping model, obtaining function equations corresponding to an upper limit and a lower limit of control parameters of the converter when the segmented delay feedback control is used to realize the stable operation of the system under the pulse input voltage, and determining a stability range of the corresponding control parameters by the function equations.
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