公开(公告)号：US20180278052A1

公开(公告)日：2018-09-27

申请号：US15934196

申请日：2018-03-23

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida

IPC: H02H11/00 ,  H02P27/06 ,  H02P29/024 ,  H02P29/032 ,  H02H7/12

CPC classification number: H02H11/005 ,  H02H7/1213 ,  H02H7/1257 ,  H02P27/06 ,  H02P29/0241 ,  H02P29/025 ,  H02P29/032

Abstract: A converter apparatus includes: an AC/DC converter; a DC link capacitor connected to the converter; a voltage detection unit detecting the DC link voltage; a switching unit connecting or disconnecting between a power supply and the converter; a switching operation unit detecting an abnormality in a motor drive device including the converter apparatus and an inverter, and control the switching unit; a power supply monitoring unit detecting a voltage inputted to the converter to monitor a connection state between the power supply and the converter; a threshold value setting unit setting a threshold value to determine the presence or absence of a short circuit failure; and a short circuit failure detection unit determining that a short circuit failure has occurred, when the voltage of the DC link capacitor, immediately after the power supply is disconnected from the converter, is equal to or less than the threshold value.

公开(公告)号：US09722413B2

公开(公告)日：2017-08-01

申请号：US14846295

申请日：2015-09-04

Applicant: Delta Electronics, Inc.

Inventor： Ming-Whang Wang

IPC: H02H3/00 ,  H02H3/16 ,  G01R27/18 ,  H02H11/00

CPC classification number: H02H3/165 ,  G01R27/18 ,  H02H3/162 ,  H02H11/005 ,  Y02T90/168 ,  Y04S30/12

Abstract: A ground-resistance detection device, which is coupled to a power system including a first power line, a second power line, and a protective earth, includes a ground-resistance detection circuit and a controller. The ground-resistance detection circuit includes a first input node and a second input node. The first input node is coupled to either the first power line or the second power line. The second input node is coupled to a ground terminal. The ground-resistance detection circuit generates a DC output voltage according to the voltage of the first input node, the voltage of the second input node, and the DC reference voltage. The controller determines the ground resistance between the protective earth and the ground terminal according to the DC reference voltage and the DC output voltage.

公开(公告)号：US20170093298A1

公开(公告)日：2017-03-30

申请号：US14870269

申请日：2015-09-30

Applicant: EATON CORPORATION

Inventor： STAN REX SIMMS ,  IRVING ALBERT GIBBS

IPC: H02M5/42 ,  H02M1/32

CPC classification number: H02M5/42 ,  H02H11/005 ,  H02M1/32 ,  H02M5/45

Abstract: In one embodiment, a variable frequency drive system includes a main contactor, a variable frequency drive, a charging module structured to generate a magnetizing AC voltage, wherein the charging module is structured to selectively provide the magnetizing AC voltage to a transformer of the variable frequency drive, and a sensing and control circuit having a number of sensors operably associated with the variable frequency drive. The sensing and control circuit is structured to detect a short circuit condition in the variable frequency drive when the magnetizing AC voltage is provided to the transformer based on an output of at least one of the number of sensors, and responsive thereto prevent the main contactor from being closed and thereby prevent the main AC voltage from being provided to the transformer.

公开(公告)号：US20160226235A1

公开(公告)日：2016-08-04

申请号：US14608468

申请日：2015-01-29

Applicant: EATON CORPORATION

Inventor： TODD MATTHEW LATHROP ,  BERT POPOVICH

IPC: H02H3/08

CPC classification number: H02H3/08 ,  H02H3/05 ,  H02H11/005 ,  H02J1/10 ,  H02J3/14 ,  H02J4/00 ,  H02J9/002 ,  Y04S20/222

Abstract: An automatic transfer switch includes a first switching apparatus having a first state to electrically connect at least one load to a primary power source and a second state to electrically connect the at least one load to a secondary power source; a sensor structured to sense information related to the power draw of the at least one load; and a control unit structured to determine the power draw of a selected one of the loads based on the output of the sensor, to compare the power draw of the selected load to a power capacity of the secondary power source, to allow the selected load to turn on if the power capacity of the secondary power source is at least greater than the power draw of the selected load, and to otherwise prevent the selected load from turning on.

Abstract translation: 一种自动转换开关包括具有第一状态以将至少一个负载电连接到主电源的第一开关装置和将至少一个负载电连接到次电源的第二状态; 传感器，其构造成感测与所述至少一个负载的功率消耗有关的信息; 以及控制单元，其被构造成基于所述传感器的输出来确定所选择的一个负载的功率消耗，以将所选择的负载的功率消耗与所述次级电源的功率容量进行比较，以允许所选择的负载 如果二次电源的功率容量至少大于所选负载的功率消耗，则开启，否则阻止所选择的负载导通。

公开(公告)号：US20160020629A1

公开(公告)日：2016-01-21

申请号：US14649323

申请日：2014-11-12

Applicant: LG CHEM., LTD.

Inventor： Jongbum LEE

IPC: H02J7/00 ,  G01R31/36

CPC classification number: H02J7/0083 ,  G01R31/3624 ,  G01R31/3648 ,  H01M10/482 ,  H02H7/18 ,  H02H11/005 ,  H02J7/0021 ,  H02J7/0026

Abstract: The present invention relates to an apparatus, a system, and a method of preventing a battery rack from being damaged by measuring a current, which, when a battery module is abnormally connected with a relay in some battery racks in installing the relay, which conducts or blocks a current flowing in the battery rack including a plurality of battery modules so that a current exceeding a predetermined current limit value flows in the battery rack, prevent a short-circuit phenomenon, by controlling an operation state of the relay before the battery rack and the relay form a short circuit, and prevent capacitance imbalance between the battery racks by controlling an operation state of the relay when a voltage difference between a plurality of battery racks exceeds a predetermined voltage difference.

Abstract translation: 本发明涉及一种通过测量电流来防止电池架被损坏的装置，系统和方法，当电池模块与安装继电器的一些电池架中的继电器异常连接时，电流传导 或者阻止在包括多个电池模块的电池架中流动的电流，使得超过预定电流极限值的电流流过电池架，防止短路现象，通过控制电池架之前的继电器的操作状态 并且继电器形成短路，并且当多个电池架之间的电压差超过预定电压差时，通过控制继电器的操作状态来防止电池架之间的电容不平衡。

公开(公告)号：US20150077891A1

公开(公告)日：2015-03-19

申请号：US14260161

申请日：2014-04-23

Applicant: JEMENA ASSET MANAGEMENT (6) PTY LTD

Inventor： Karl Nathan Edwards

IPC: G01R31/42 ,  G01R31/04 ,  H02H3/50 ,  G01R31/02

CPC classification number: G01R31/42 ,  G01R31/021 ,  G01R31/024 ,  G01R31/025 ,  G01R31/04 ,  G01R31/041 ,  H01H83/14 ,  H02H3/32 ,  H02H3/38 ,  H02H3/50 ,  H02H5/105 ,  H02H11/001 ,  H02H11/002 ,  H02H11/005

Abstract: A method for detecting predetermined fault conditions associated with the supply of AC electrical power to a consumer, the supply having an active conductor and a neutral conductor with the neutral conductor being connected to earth. The method comprises providing a first current detector associated with the active conductor; providing a second current detector associated with the neutral conductor; providing a voltage detector to detect voltage between the active conductor and the neutral conductor; and checking a current ratio of neutral current to active current whereby the current ratio is indicative of a predetermined fault condition. Also disclosed is a method of checking the condition of supply line active and neutral conductors in a consumer's supplied premises including determining the impedance of the active conductor and the impedance of the neutral conductor to indicate the condition of each of the active and neutral conductors.

Abstract translation: 用于检测与向消费者提供AC电力相关联的预定故障状况的方法，所述电源具有有源导体和中性导体，所述中性导体连接到地球。 该方法包括提供与有源导体相关联的第一电流检测器; 提供与所述中性导体相关联的第二电流检测器; 提供电压检测器来检测有源导体和中性导体之间的电压; 并检查中性点电流与有效电流的电流比，由此电流比率表示预定的故障状态。 还公开了一种检查消费者提供的场所中供电线有源和中性导体的状况的方法，包括确定有源导体的阻抗和中性导体的阻抗，以指示每个有源和中性导体的状态。

公开(公告)号：US20140312822A1

公开(公告)日：2014-10-23

申请号：US14256537

申请日：2014-04-18

Applicant: Fanuc Corporation

Inventor： Youichirou Ooi

IPC: H02P7/00

CPC classification number: H02P7/00 ,  H02H7/1213 ,  H02H7/1227 ,  H02H11/005 ,  H02H11/006 ,  H02P27/06 ,  H02P29/024 ,  H02P29/0241 ,  H02P29/032

Abstract: A motor drive device according to one embodiment of the present invention includes a converter (2) for converting an AC voltage input from a main power supply into a DC voltage, a DC link unit (4) for rectifying the DC voltage output from the converter, an inverter (10) for converting the DC voltage rectified by the DC link unit into an AC voltage for driving a motor using a semiconductor switching element, a voltage application unit (6) that is provided independently of the main power supply to apply a voltage to the DC link unit, a voltage detector (7) for detecting a voltage of the DC link unit after application of the voltage by the voltage application unit, and an abnormality determination unit (8) for determining the presence or absence of an abnormality of the DC link unit based on the voltage detected by the voltage detector.

Abstract translation: 根据本发明的一个实施例的电动机驱动装置包括用于将从主电源输入的交流电压转换为直流电压的转换器（2），用于整流从转换器输出的直流电压的直流链路单元（4） ，用于将由DC链路单元整流的DC电压转换为用于使用半导体开关元件驱动电动机的AC电压的逆变器（10），独立于主电源设置的电压施加单元（6） 电压施加单元，用于在施加电压施加单元之后检测DC链路单元的电压的电压检测器（7），以及用于确定异常存在或不存在的异常判定单元（8） 基于由电压检测器检测的电压的DC链路单元。

公开(公告)号：US20140103990A1

公开(公告)日：2014-04-17

申请号：US13650285

申请日：2012-10-12

Applicant: The Boeing Company

Inventor： Robert Dennis Holley ,  N. Evan Lurton

IPC: H03K17/687

CPC classification number: H03K17/18 ,  G01R31/3277 ,  G01R31/40 ,  H02H3/04 ,  H02H3/05 ,  H02H3/08 ,  H02H3/202 ,  H02H7/1225 ,  H02H7/222 ,  H02H11/005

Abstract: The present disclosure is generally directed to a plurality of solid state switches of varying periphery sizes connected in series between a power source and a load. A built-in test circuit senses an overvoltage condition across one or more of the varying periphery sizes and opens or closes the one or more of the varying periphery sizes in accordance with a measured voltage across at least one solid state switch of the plurality of solid state switches.

Abstract translation: 本公开通常涉及在电源和负载之间串联连接的各种外围尺寸的多个固态开关。 内置测试电路检测跨越一个或多个变化的外围尺寸的过电压状态，并且根据多个固体中的至少一个固态开关的测量电压来打开或关闭一个或多个变化的外围尺寸 状态开关。

公开(公告)号：US07978447B2

公开(公告)日：2011-07-12

申请号：US12400172

申请日：2009-03-09

Applicant: Michael Baxter

Inventor： Michael Baxter

IPC: H02H3/00

CPC classification number: H02H11/005

Abstract: A safety outlet that prevents hazardous conditions is described. Embodiments of the outlet use safe low-voltage DC power to check and ensure that an appliance is plugged into the outlet, that the appliance does not have short circuits or ground faults, and that the appliance is switched on. Some embodiments warn of unsafe conditions. Until the safety checks are performed and satisfactorily passed, embodiments of the outlet keep the AC power turned off and isolated from the outlet. Only then is the receptacle powered, after which the appliance can be used normally. Once the appliance is switched off, the power at the outlet is also turned off automatically. When an appliance is in use, some embodiments of the invention continue providing ground fault protection using GFCI technology. All this is performed automatically and quickly, nearly imperceptibly in normal use. Some embodiments may be integrated with external control systems.

Abstract translation: 描述了防止危险状况的安全出口。 插座的实施例使用安全的低压直流电力来检查并确保器具插入插座，器具没有短路或接地故障，并且器具被接通。 一些实施例警告不安全的条件。 直到执行安全检查并令人满意地通过，插座的实施例保持AC电源被切断并与出口隔离。 只有在插座供电的情况下，才能正常使用电器。 一旦设备关闭，出口电源也会自动关闭。 当使用器具时，本发明的一些实施例使用GFCI技术继续提供接地故障保护。 所有这些都是自动快速执行的，在正常使用中几乎无法察觉。 一些实施例可以与外部控制系统集成。

公开(公告)号：US20090225480A1

公开(公告)日：2009-09-10

申请号：US12400172

申请日：2009-03-09

Applicant: Michael Baxter

Inventor： Michael Baxter

IPC: H02H3/16 ,  H02H3/12

CPC classification number: H02H11/005

Abstract: A safety outlet that prevents hazardous conditions is described. Embodiments of the outlet use safe low-voltage DC power to check and ensure that an appliance is plugged into the outlet, that the appliance does not have short circuits or ground faults, and that the appliance is switched on. Some embodiments warn of unsafe conditions. Until the safety checks are performed and satisfactorily passed, embodiments of the outlet keep the AC power turned off and isolated from the outlet. Only then is the receptacle powered, after which the appliance can be used normally. Once the appliance is switched off, the power at the outlet is also turned off automatically. When an appliance is in use, some embodiments of the invention continue providing ground fault protection using GFCI technology. All this is performed automatically and quickly, nearly imperceptibly in normal use. Some embodiments may be integrated with external control systems.

Abstract translation: 描述了防止危险状况的安全出口。 插座的实施例使用安全的低压直流电力来检查并确保器具插入插座，器具没有短路或接地故障，并且器具被接通。 一些实施例警告不安全的条件。 直到执行安全检查并令人满意地通过，插座的实施例保持AC电源被切断并与出口隔离。 只有在插座供电的情况下，才能正常使用电器。 一旦设备关闭，出口电源也会自动关闭。 当使用器具时，本发明的一些实施例使用GFCI技术继续提供接地故障保护。 所有这些都是自动快速执行的，在正常使用中几乎无法察觉。 一些实施例可以与外部控制系统集成。