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公开(公告)号：US09455658B2
公开(公告)日：2016-09-27
申请号：US14401792
申请日：2013-04-19
发明人： Herbert Kammerl , Alfred Bieringer
CPC分类号： H02P13/06 , H01H9/0027 , H01H9/0038 , H01H9/0044
摘要： The invention relates to an on-load tap changer for switching among different winding taps of a step transformer without interruption. According to the invention, the selector contact unit (7) and the switching means (16, 17) for switching the load without interruption are jointly actuated without using an intermediate energy accumulator, by means of a threaded spindle (5) which is rotated by a drive motor (2) during a switching operation.
摘要翻译： 本发明涉及一种用于在不间断地切换台阶变压器的不同绕组抽头之间切换的有载分接开关。 根据本发明，用于不间断地切换负载的选择器接触单元（7）和切换装置（16,17）在不使用中间蓄能器的情况下通过螺纹主轴（5）共同致动，螺纹主轴（5）由 在切换操作期间驱动马达（2）。
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公开(公告)号：US20160233680A1
公开(公告)日：2016-08-11
申请号：US14911392
申请日：2014-08-13
发明人： Alexei BABIZKI , Haijun FENG
IPC分类号： H02J3/38
摘要： The invention relates to a device (1) and a method for controlling the stability of a local network (3). The local network (3) comprises a plurality of outgoing circuits (41, 42, . . . , 4M), each having at least one load (5) and/or at least one decentralised energy generation system (6). Said device is provided with an on-load tap-changer (14) for adjusting an output voltage of the local network transformer (10). The device is characterised in that a unit (16) for measuring current, connected to at least one of the plurality of outgoing circuits (41, 42, . . . , 4M), and a unit (18) for measuring voltage, connected to a busbar (8) of the local network (3), are arranged in a transformer housing (20).
摘要翻译： 本发明涉及一种用于控制本地网络（3）的稳定性的设备（1）和方法。 本地网络（3）包括多个输出电路（41,42，...，4M），每个输出电路具有至少一个负载（5）和/或至少一个分散式能量产生系统（6）。 所述装置设有用于调节本地网络变压器（10）的输出电压的有载分接开关（14）。 该装置的特征在于，用于测量电流的单元（16），连接到多个输出电路（41,42，...，4M）中的至少一个，以及用于测量电压的单元（18），连接到 本地网络（3）的母线（8）布置在变压器壳体（20）中。
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公开(公告)号：US20160211089A1
公开(公告)日：2016-07-21
申请号：US14915361
申请日：2014-09-26
发明人： Uwe KALTENBORN , Thomas STROF , Christian HURM , Anatoli SAVELIEV , Gerhard BAEUML , Alfred BIERINGER , Eduard ZERR , Wolfgang ALBRECHT , Martin HAUSMANN , Andreas STOCKER
CPC分类号： H01H9/0027 , H01F29/04 , H01H9/0011 , H01H9/0016 , H01H9/0038
摘要： The invention relates to a step switch, comprising a preselector and a fine selector. The invention is characterized in that the step switch has a connection (36) between the pre-selector and the fine selector (18), at least one coupling switch (38) being arranged in said connection. A pre-selector can be switched in a largely gas-free manner by means of said switchable connection with the aid of the fine selector.
摘要翻译： 本发明涉及一种步进开关，包括预选器和精选机。 本发明的特征在于，步进开关具有在预选器和精选机（18）之间的连接（36），至少一个耦合开关（38）布置在所述连接中。 借助于精细选择器，借助于所述可切换连接，预选择器可以大大无气体地切换。
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64.发明申请SYSTEM AND METHOD FOR IDENTIFYING AND DISTINGUISHING MATERIALS, METHOD FOR IDENTIFYING OR DISTINGUISHING MATERIALS, AND MEASURING DEVICE FOR RECORDING MATERIAL PROPERTIES OF MATERIALS 审中-公开用于鉴别和鉴定材料的系统和方法，识别或鉴别材料的方法以及用于记录材料的材料性质的测量装置公开(公告)号：US20150120213A1
公开(公告)日：2015-04-30
申请号：US14593016
申请日：2015-01-09
发明人： Stefan Nettesheim
IPC分类号： G01N33/00
CPC分类号： G01N33/00 , G01N27/04 , G01N35/00871 , G01N2033/0091 , G01N2035/00653 , G01N2035/00881
摘要： A system for identifying or distinguishing materials, comprising at least one local apparatus and a central station. Each local apparatus comprises at least one measuring device for recording at least one actual signature for materials each and at least one local computer communicatively connected to the at least one measuring device, the at least one local computer having a local database for storing and/or processing the actual signature. The at least one central station comprises a server having a central database for storing and/or processing the actual signatures of the local apparatus. Furthermore, the system comprises a network, which communicatively connects the local computers of the local units via the server of the center. The invention further relates to a corresponding method for operating a system, to an analysis method for identifying or distinguishing the materials, and to a measuring device for recording material properties of the materials.
摘要翻译： 一种用于识别或区分材料的系统，包括至少一个本地装置和中心站。 每个本地装置包括用于记录材料的至少一个实际签名的至少一个测量装置，以及与至少一个测量装置通信地连接的至少一个本地计算机，所述至少一个本地计算机具有用于存储和/或 处理实际签名。 所述至少一个中心站包括具有用于存储和/或处理本地设备的实际签名的中央数据库的服务器。 此外，该系统包括网络，其通过中心的服务器通信地连接本地单元的本地计算机。 本发明还涉及用于操作系统的相应方法，用于识别或区分材料的分析方法以及用于记录材料的材料特性的测量装置。
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公开(公告)号：US11264916B2
公开(公告)日：2022-03-01
申请号：US17291634
申请日：2019-11-15
发明人： Ara Bissal , Waqas Ali
摘要： A method that operates a modular multilevel converter (MMC), includes controlling a plurality of submodules of an arm of the MMC for a plurality of subsequent periods. Each of the submodules has a capacitor. The controlling includes, for each of the subsequent periods: sampling a value of a reference voltage; determining an integer number n of submodules of the plurality of submodules required to approximate the sampled value; for each submodule of a subset of the n submodules of the plurality of submodules, determining a temperature characterizing the respective submodule; inserting all submodules of the subset of the n submodules except for one remaining submodule; determining, depending on the determined temperatures, a duty ratio; and inserting the one remaining submodule for a duration given by the duty ratio. A minimum temperature of the determined temperatures is identified and the duty ratio is determined depending on the minimum temperature.
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公开(公告)号：US20220014113A1
公开(公告)日：2022-01-13
申请号：US17291614
申请日：2019-11-15
发明人： Ara Bissal , Waqas Ali
IPC分类号： H02M7/483 , H02M1/36 , H02M7/5387 , G01R31/00
摘要： A modular multilevel converter is for a high voltage testing source. The modular multilevel converter includes: an arm, the arm having a plurality of submodules coupled in series, wherein each of the submodules has a capacitor; and a control unit for controlling a pre-charging process of the capacitor of each of the submodules prior to a start of operation of the modular multilevel converter. The control unit is configured to: connect the arm to a constant voltage source for a first period of time; and, for a second period of time after the first period of time, feed a charging current to the arm and control the charging current at a predetermined constant reference current.
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公开(公告)号：US20210376757A1
公开(公告)日：2021-12-02
申请号：US17291634
申请日：2019-11-15
发明人： Ara Bissal , Waqas Ali
IPC分类号： H02M7/483
摘要： A method that operates a modular multilevel converter (MMC), includes controlling a plurality of submodules of an arm of the MMC for a plurality of subsequent periods. Each of the submodules has a capacitor. The controlling includes, for each of the subsequent periods: sampling a value of a reference voltage; determining an integer number n of submodules of the plurality of submodules required to approximate the sampled value; for each submodule of a subset of the n submodules of the plurality of submodules, determining a temperature characterizing the respective submodule; inserting all submodules of the subset of the n submodules except for one remaining submodule; determining, depending on the determined temperatures, a duty ratio; and inserting the one remaining submodule for a duration given by the duty ratio. A minimum temperature of the determined temperatures is identified and the duty ratio is determined depending on the minimum temperature.
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公开(公告)号：US20210318176A1
公开(公告)日：2021-10-14
申请号：US17276896
申请日：2019-09-19
发明人： Angus Bryant
摘要： A method analyzes an operation of a power semiconductor device. The method includes: providing a set of reference voltages of the power semiconductor device and a set of corresponding reference currents; measuring an on-state voltage and a corresponding on-state current of the power semiconductor device to obtain a measurement point; adapting the set of reference voltages by adapting two of the set of reference voltages lying closest to the measurement point by extrapolating the measurement point; and using the adapted set of reference voltages to analyze the operation of the power semiconductor device. The extrapolation is based on a predefined reference increment current and a predefined reference increment voltage.
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公开(公告)号：US11125801B2
公开(公告)日：2021-09-21
申请号：US16487444
申请日：2018-02-22
发明人： Karsten Viereck , Junliang Wu , Ulrich Sundermann
摘要： A method monitors capacitor bushings for an AC mains. The mains has first-third phases, associated with first-third mains lines, capacitor bushings, and mains voltages. Each capacitor bushing has a conductor, surrounded by foil, connecting its mains line. The method includes: at a first instant, for each phase: a first reference voltage phasor is determined; and a foil voltage present between the respective foil and ground potential is detected and a corresponding first foil voltage phasor is determined; at a second instant, for each of the phases: a second reference voltage phasor is determined; the foil voltage is detected and a second foil voltage phasor is determined; for each capacitor bushing: a loss factor change is calculated based on the respective reference voltages and foil phasors and those of the adjacent capacitive bushing; and a monitoring signal is generated based on a comparison of the loss factor and a tolerance value.
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公开(公告)号：US20210273635A1
公开(公告)日：2021-09-02
申请号：US17276850
申请日：2019-09-19
发明人： Matthew Wilcock
IPC分类号： H03K17/082
摘要： A power electronic system includes a transistor, a feedback device, and an evaluator. The feedback device is connected between a control terminal of the transistor and a collector terminal of the transistor. The feedback device is configured to provide a negative feedback to the transistor. The evaluator is configured to determine a junction temperature of the transistor or an on-state current of the transistor based upon on a control voltage of the transistor.
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