-
公开(公告)号：US20170222590A1
公开(公告)日：2017-08-03
申请号：US15308818
申请日：2015-08-19
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Hao Chen , Jiaotong Shi
IPC: H02P25/098 , H02P6/10
CPC classification number: H02P25/098 , H02P6/10
Abstract: A three-phase switched reluctance motor torque ripple two-level suppression method is disclosed. A first set of torque thresholds is set in rotor position interval [0°, θr/3]. A second set of torque thresholds is set in rotor position interval [θr/3, θr/2]. Power is supplied to adjacent phase A and phase B for excitation. The power supplied for excitation to phase A leads the power supplied for excitation to phase B by θr/3. Phase A is turned off while phase B is turned on. An entire commutation process from phase A to phase B is divided into two intervals. In rotor position interval [0°, θ1], phase A uses the second set of torque thresholds while phase B uses the first set of torque thresholds. Critical position θ1 automatically appears in the commutation process, thus obviating the need for additional calculations. Total torque is controlled between [Te+th2low and Te+th2up]. In rotor position interval [θ1, θr/3], phase A continues to use the second set of torque thresholds, phase B continues to use the first set of torque thresholds, and the total torque is controlled between [Te+th1low and Te+th1up]. This suppresses torque ripples of a three-phase switched reluctance motor.
-
112.发明授权公开(公告)号：US09695017B2
公开(公告)日：2017-07-04
申请号：US14441550
申请日：2014-03-26
Applicant: China University of Mining and Technology , Xuzhou Coal Mine Safety Equipment Manufacture Co., Ltd.
Inventor： Zhencai Zhu , Gongbo Zhou , Changhua Hu , Guohua Cao , Wei Li , Guoan Chen , Yuxing Peng , Qingyong Du , Zhi Liu
IPC: B66B17/04
CPC classification number: B66B17/04
Abstract: An adjustable intermediate disk body of large double-layer cage comprises cage columns, a main intermediate disk body, and a chain block and a connecting piece. An intermediate disk guide rail beam is arranged on the inner side of the cage columns, wedge bases are symmetrically arranged on the two sides of the lower part of the intermediate disk guide rail beam, a limited block with a bolt hole is arranged on the upper part of the intermediate disk guide rail beam, and an anti-disengaging plate is arranged on the intermediate disk guide rail beam. Intermediate disk wedge bodies, which match the wedge faces of the wedge bases and can only move vertically along the intermediate disk guide rail beams, are arranged on the two side faces of the main intermediate disk body, at positions corresponding to the intermediate disk guide rail beams; an intermediate disk guide wheel that is fitted with the intermediate disk guide rail beam and an intermediate disk guide wheel seat with a bolt hole are arranged on the upper part of the intermediate disk wedge body.
-
113.发明申请公开(公告)号：US20170145794A1
公开(公告)日：2017-05-25
申请号：US15325506
申请日：2015-12-21
Applicant: China University of Mining and Technology
Inventor： Baiquan Lin , Ting Liu , Quanle Zou , Chang Guo , Chuanjie Zhu , Hao Yao , Fazhi Yan , Jia Kong , Yidu Hong
CPC classification number: E21B43/006 , E21B7/00 , E21B43/24 , E21B43/30 , E21F7/00
Abstract: A method for combining integrated drilling, flushing and slotting with thermal injection to enhance coalbed gas extraction, applicable to managing gas extraction from microporous, low-permeability, high-adsorption coalbed areas. A gas extraction borehole is drilled within a certain distance of a predetermined drilling, flushing and slotting borehole, and, once sealed, is used for gas extraction. An integrated drilling, flushing and slotting drill bit is used to sink the borehole, which is then sealed. Concentration variation in the gas extraction borehole is monitored in real time, and when concentration is below 30%, borehole is opened and high-temperature steam is injected by means of a steam generator, after which the borehole is again closed. Drilling a drilling, flushing and slotting borehole increases pressure relief space and the surface of exposed coal, relieves stress on the coal body, and increases gas permeability of the coalbed, while the injection of high-temperature steam promotes gas desorption in the coal body, promotes crack propagation around the borehole, and increases channels for gas flow, thus achieving highly efficient extraction of gas from the coalbed.
-
公开(公告)号：US20170098955A1
公开(公告)日：2017-04-06
申请号：US15126836
申请日：2015-05-13
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Gongbo ZHOU , Zhencai ZHU , Peng ZHANG , Wei LI , Guohua CAO , Penghui WANG
Abstract: An energy supply method and device for a monitoring wireless sensor node of a roller. A node energy supply device (2) is arranged on a roller web (1). The node energy supply device (2) comprises a generator (2-1), a disc rail (2-3), an input shaft (2-4), a swing link (2-5), a swing wheel (2-8) and an energy collection module (2-10). The generator (2-1) is driven to rotate using the rotation motion of the roller, the mechanical energy is converted into electric energy by the generator (2-1), and power is supplied to a monitoring wireless sensor node by the energy collection module (2-10). After rectification, filtering and voltage stabilization are conducted on the electric energy generated by cutting a magnetic induction line when the generator (2-1) operates, the energy collection module (2-10) uses the electric energy for charging an internal battery of the monitoring wireless sensor node. When the roller operates, the swing wheel (2-8) will keep vertically downward because of the gravity action thereof, thereby rotating relative to the input shaft (2-4) of the generator (2-1) to drive the generator (2-1) to operate. The present invention has the advantages of simple structure without manual operations, and energy saving and environmental protection.
-
115.发明申请CO3W3C Fishbone-Like Hard Phase-Reinforced Fe-Based Wear-Resistant Coating and Preparation Thereof 审中-公开CO3W3C鱼骨状硬相强化Fe基耐磨涂层及其制备公开(公告)号：US20170044673A1
公开(公告)日：2017-02-16
申请号：US15118750
申请日：2015-08-06
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
CPC classification number: C23C24/103 , B22F1/00 , B22F1/0003 , B22F2302/10 , B22F2302/45 , B23K10/027 , B23K35/00 , B23K2103/04 , B23K2103/26 , B32B15/013 , C22C1/1084 , C22C27/04 , C22C29/067 , C22C29/08 , C22C30/00 , C22C38/02 , C22C38/44 , C22C38/52 , C22C38/56
Abstract: A Co3W3C fishbone-like hard phase-reinforced Fe-based wear-resistant coating and the preparation thereof, which belongs to the field of a wear-resistant coating on the surface of a material and a preparation method thereof. The wear-resistant coating comprises: 1.89-3.77% of C, 5.4-11.7% of Cr, 3.3-7.15% of Ni, 28.81-57.83% of W, 4.2-8.4% of Co, 0.03-0.065% of Si and the balance of Fe. The preparation process of the wear-resistant coating comprises: (1) before plasma cladding, pretreating a matrix; (2) pretreating an iron-based alloy powder; and (3) adjusting the process parameters of plasma cladding, preparing a cladding layer with a predetermined width and a predetermined thickness, and naturally cooling same down in air. The wear-resistant coating is simple in process; the prepared cladding layer has a strong metallurgical bonding property with the matrix structure, so that the best performance matching between the ceramic phase of the cladding layer and the matrix can be achieved; a fishbone-like hard phase Co3W3C has a very high hardness value and plays the role of a framework in the frictional process to reduce the wear of the matrix structure, thereby achieving an excellent wear resistance; plasma cladding is convenient to operate, and can be automatized; and the prepared wear-resistant layer is high in size precision and can be widely applied to surface modification of mechanical parts.
Abstract translation: 一种Co3W3C鱼骨状硬相增强Fe基耐磨涂层及其制备方法，属于材料表面耐磨涂层领域及其制备方法。 耐磨涂层包括：1.89-3.77％的C，5.4-11.7％的Cr，3.3-7.15％的Ni，28.81-57.83％的W，4.2-8.4％的Co，0.03-0.065％的Si和 余铁。 耐磨涂层的制备方法包括：（1）等离子体包覆前，预处理基体; （2）预处理铁基合金粉末; 和（3）调整等离子体包层的工艺参数，制备具有预定宽度和预定厚度的包覆层，并在空气中自然冷却。 耐磨涂层工艺简单; 制备的包层与基体结构具有很强的冶金结合性能，从而可以实现包层的陶瓷相与基体之间的最佳性能匹配; 鱼骨状硬质相Co3W3C具有非常高的硬度值，起到减摩基体结构磨损的摩擦过程的作用，达到优异的耐磨性; 等离子体包层操作方便，可自动化; 制备的耐磨层尺寸精度高，可广泛应用于机械零件的表面改性。
-
Patent Agency Ranking
公开(公告)号：US09428367B2
公开(公告)日：2016-08-30
申请号：US14432538
申请日：2014-01-27
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Zhencai Zhu , Guohua Cao , Hong Lai , Jiancong Qin , Hongqiao Kang , Wei Li , Gongbo Zhou , Yuxing Peng , Yiping Ma , Jianrong Yang
CPC classification number: B66B23/02 , B66B21/04 , B66B23/00 , B66B23/028 , B66B23/12
Abstract: Embodiments of the invention provide a long-distance transport system for people in an inclined lane, in which the system includes a plurality of hydraulic driving units, a traction chain, a truss, supporting guide rails and retractable pedals. According to an embodiment of the invention, the truss is formed by a plurality of truss units sequentially connected end to end. Each truss unit is provided with the hydraulic driving unit. The traction chain and the supporting guide rails are all arranged in the length direction of the truss. The traction chain is driven by and connected with the plurality of the hydraulic driving units. The retractable pedals are arranged on the traction chain and are provided with supporting rollers rolling along the supporting guide rails.
Abstract translation: 本发明的实施例提供了一种用于倾斜车道中的人的长距离运输系统，其中系统包括多个液压驱动单元，牵引链，桁架，支撑导轨和可伸缩踏板。 根据本发明的一个实施例，桁架由多个桁架单元形成，该桁架单元顺序地连接到端部。 每个桁架单元配有液压驱动单元。 牵引链和支撑导轨都沿着桁架的长度方向排列。 牵引链由多个液压驱动单元驱动并与其连接。 可伸缩踏板布置在牵引链上，并且设置有沿着支撑导轨滚动的支撑辊。
-
公开(公告)号：US20150363529A1
公开(公告)日：2015-12-17
申请号：US14762298
申请日：2013-04-19
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
CPC classification number: H02P25/08 , G06F17/5036
Abstract: A method for creating a switch reluctance motor memory sensor model. A switch reluctance motor memory sensor circuit model is formed by two current transmitters AD844, an operational amplifier AD826, a memristor, a capacitor, and three resistors. The method for creating a switch reluctance motor memory sensor model enables physical phenomena in a simulation system to be similar to an actual switch reluctance motor system, and is beneficial for direct mathematical simulation of a switch reluctance motor system. The method is simple, can improve static and dynamic performance of a system, and achieves real-time simulation and real-time control of the switch reluctance motor system.
Abstract translation: 一种用于创建开关磁阻电动机存储器传感器模型的方法。 开关磁阻电机存储器传感器电路模型由两个电流发射器AD844，运算放大器AD826，忆阻器，电容器和三个电阻器组成。 用于创建开关磁阻电动机存储器传感器模型的方法使仿真系统中的物理现象与实际的开关磁阻电动机系统相似，并且有益于开关磁阻电动机系统的直接数学模拟。 该方法简单，可以提高系统的静态和动态性能，实现开关磁阻电机系统的实时仿真和实时控制。
-
公开(公告)号：US20140340056A1
公开(公告)日：2014-11-20
申请号：US14344887
申请日：2013-01-24
Applicant: China University of Mining and Technology
Inventor： Hao Chen
CPC classification number: H02P9/009 , H02P9/02 , H02P25/0925
Abstract: A control method for a switched reluctance generator employing dual switched-mode power converters does not require a position sensor. In the excitation stage, the upper tube and lower tube of the main switch of a phase in the power converter are switched on, and the phase current is detected. When the phase current rises to a preset threshold, the upper tube or lower tube of the main switch of the phase is switched off, changing the phase of the switched reluctance generator into a zero voltage natural freewheeling state. When the phase current drops to the valley value, the rotor position is the end position of maximum phase inductance of the phase. This rotor position is used as the switch-off position of the main switch of the phase of the switched reluctance generator, and the upper tube and lower tube for the main switch of the phase are switched off.
Abstract translation: 采用双开关电源转换器的开关磁阻发电机的控制方法不需要位置传感器。 在励磁阶段，电源转换器中相的主开关的上管和下管接通，检测相电流。 当相电流上升到预设阈值时，该相的主开关的上管或下管被切断，将开关磁阻发生器的相位改变为零电压自然续流状态。 当相电流下降到谷值时，转子位置是相位最大相电感的最终位置。 该转子位置用作开关磁阻发生器相位主开关的断开位置，并且该相的主开关的上管和下管被切断。
-
公开(公告)号：US20250155390A1
公开(公告)日：2025-05-15
申请号：US18907408
申请日：2024-10-04
Inventor： Jinlong ZHAO , Zhenqi HU , Haoyuan LI , Jianping ZHANG
Abstract: An experimental device for thermal-stability and re-ignition of fire foams under different heating conditions, comprises a rectangular mounting module, a radiation module, a convection module, a supply module, a foam injection module, a measurement module and an intelligent control module: (i) the rectangular mounting module is used to load the oil and foam; (ii) the radiation module simulates the effects of thermal radiation, whereas the convection module thermal convection by a fire plume; (iii) the supply module is used to supply water and oil; (iv) the foam injection module is used to generate and inject foam to the rectangular mounting module; and (v) the measurement module is used to monitor the internal temperature and heat flow parameters of the rectangular mounting module, and to record the foam layer failure time and the flame re-ignition process and finally (vi) the intelligent control module controls all other modules for any test condition.
-
公开(公告)号：US20250117732A1
公开(公告)日：2025-04-10
申请号：US18898719
申请日：2024-09-27
Applicant: China University of Mining and Technology
Inventor： Jing Li , Jiaxin Liang , Jiangrun Huo , Xingguang Yan , Tianyue Ma
IPC: G06Q10/0639 , G06Q50/02
Abstract: A method and device for evaluating ecological cumulative effects of surface mining areas are provided. The method includes: constructing a surface mining areas eco-environmental evaluation index (SMAEEI) suitable for semi-arid grasslands; constructing a first eco-environmental quality condition adjustment coefficient R(Si,j,th) based on the actual land cover classification result and the SMAEEI; obtaining the actual ecosystem service value ESV per unit area of the area to be evaluated in several years through the unit area ecosystem service value coefficient VCif of the area to be evaluated and the first eco-environmental quality condition adjustment coefficient R(Si,j,th); based on the time-series trajectory integral value of the actual ecosystem service value ESV per unit area and the ideal ecosystem service value ESV′ per unit area undisturbed by human beings, performing residual analysis to obtain the ecosystem service value accumulation induced by anthropogenic factors (ESVA-AF).
-
-
-
-
-
-
-
-
-
Search Results
606
records
(took 0.023 seconds)
