公开(公告)号：US3493839A

公开(公告)日：1970-02-03

申请号：US3493839D

申请日：1967-12-26

申请人： GEN ELECTRIC

发明人： PUY ROBERT P DE

IPC分类号： H02H3/18 ,  H02H7/125 ,  H02M1/18

CPC分类号： H02H7/1255 ,  H02H3/18 ,  Y10T307/839

公开(公告)号：US20180278046A1

公开(公告)日：2018-09-27

申请号：US15542334

申请日：2015-02-13

申请人： MITSUBISHI ELECTRIC CORPORATION

发明人： Takuo ARAMAKI

IPC分类号： H02H7/125

CPC分类号： H02H7/1255 ,  H02H7/12 ,  H02M7/12 ,  H02M7/48 ,  H02M7/72 ,  H02M7/797 ,  H04B3/00

摘要： A protection device for a power converter provided between an AC system and a DC power transmission system is configured to: receive an input of an AC current value obtained between a transformer connected to the AC system and the power converter capable of converting AC power into DC power; receive an input of a change rate of a direct current detected by a Rogowski coil provided between a DC line and the power converter, the DC line receiving DC power from the power converter; determine based on the AC current value and the change rate whether a fault occurs or not in one of the power converter and the DC line; and output information for protecting the power converter based on a determination result.

公开(公告)号：US20160167152A1

公开(公告)日：2016-06-16

申请号：US14565994

申请日：2014-12-10

申请人： ILLINOIS TOOL WORKS INC.

发明人： James F. Ulrich

IPC分类号： B23K9/10 ,  B23K9/095

CPC分类号： B23K9/1043 ,  B23K9/0953 ,  B23K9/0956 ,  B23K9/1006 ,  B23K9/1062 ,  B23K9/173 ,  G01R31/024 ,  G01R31/263 ,  H02H7/1255 ,  H02M1/088 ,  H02M7/162

摘要： A welding system includes a power supply coupled to a power source and configured to receive a power signal. The power supply includes power conversion circuitry having one or more silicon-controlled rectifiers (SCRs) and configured to rectify the power signal to generate a DC signal for use in providing welding power. The welding system also includes an SCR detection system configured to receive a signal indicative of an inductor current of the DC signal and a signal indicative of a voltage of the DC signal. The SCR detection system is further configured detect a non-firing, open, or shorted SCR in the one or more SCRs based on the inductor current and the welding voltage of the DC signal.

摘要翻译： 焊接系统包括耦合到电源并被配置为接收功率信号的电源。 电源包括具有一个或多个硅控整流器（SCR）的功率转换电路，并且被配置为对功率信号进行整流以产生用于提供焊接功率的DC信号。 焊接系统还包括SCR检测系统，其被配置为接收指示DC信号的电感器电流的信号和指示DC信号的电压的信号。 SCR检测系统还被配置为基于电感器电流和DC信号的焊接电压来检测一个或多个SCR中的非点火，开路或短路SCR。

公开(公告)号：US20150098258A1

公开(公告)日：2015-04-09

申请号：US14508467

申请日：2014-10-07

申请人： ABB Oy

发明人： Ki-Bum PARK ,  Sami PETTERSSON ,  Francisco CANALES

IPC分类号： H02M1/32 ,  H02M5/42

CPC分类号： H02M1/32 ,  H02H7/1216 ,  H02H7/1225 ,  H02H7/1255 ,  H02M5/42 ,  H02M5/4585

摘要： A converter circuit with short-circuit protection can include a plurality of phase legs having a series connection of normally-on switches, between voltage rails of a DC voltage link, a DC link capacitor, and AC voltage connection points between the normally-on switches. A phase-to-phase short-circuit protection circuit includes a parallel connection of a resistive component and a controllable switch. The phase-to-phase short-circuit protection circuit including a first terminal connected to an AC voltage connection point and a second terminal forms an input or an output of the converter circuit; and a controllable switch is connected in series with the DC link capacitor. Upon lack of control of the normally-on switches the controllable switch of the at least one phase-to-phase short-circuit protection circuit and the controllable switch of the phase leg short-circuit protection circuit are adapted to be controlled to a non-conductive state.

摘要翻译： 具有短路保护的A转换器电路可以包括多个相位支路，其具有常开开关的串联连接，直流电压链路的电压轨道，直流链路电容器和常开开关之间的交流电压连接点 。 相间短路保护电路包括电阻元件和可控开关的并联连接。 包括连接到AC电压连接点的第一端子和第二端子的相间短路保护电路形成转换器电路的输入或输出; 并且可控开关与DC链路电容器串联连接。 由于缺少常开开关的控制，所述至少一个相间短路保护电路的可控开关和相桥脚短路保护电路的可控开关适于被控制为非相位短路保护电路， 导电状态。

公开(公告)号：US08971070B2

公开(公告)日：2015-03-03

申请号：US14354431

申请日：2011-10-27

申请人： Ying Jiang Häfner

发明人： Ying Jiang Häfner

IPC分类号： H02H7/125 ,  H02J3/36

CPC分类号： H02H7/1255 ,  H02J3/36 ,  Y02E60/60

摘要： An interface arrangement for coupling between an AC system and a DC system. The arrangement includes a converter for conversion between AC and DC and having a DC side with a first and a second terminal for connection to the DC system and an AC side with a group of terminals for being coupled to the AC system, a transformer having a primary side with a first set of primary windings for being coupled to the AC system and a secondary side with a second set of secondary windings coupled to the converter, where the transformer is equipped with a third set of auxiliary windings and a short-circuiting device is connected between the third set of auxiliary windings and ground.

摘要翻译： 一种用于在AC系统和DC系统之间耦合的接口装置。 该装置包括用于在AC和DC之间转换并具有DC侧的转换器，其具有用于连接到DC系统的第一和第二端子以及具有用于耦合到AC系统的一组端子的AC侧，具有 初级侧具有用于耦合到AC系统的第一组初级绕组和具有耦合到转换器的第二组次级绕组的次级侧，其中变压器配备有第三组辅助绕组和短路装置 连接在第三组辅助绕组和地之间。

公开(公告)号：US08643983B2

公开(公告)日：2014-02-04

申请号：US13893138

申请日：2013-05-13

申请人： Power Integrations, Inc.

发明人： Yury Gaknoki ,  Yue Zhang ,  Mingming Mao

IPC分类号： H02H9/02

CPC分类号： H02M1/32 ,  H02H7/1255 ,  H02M3/33569

摘要： This relates to detecting unwanted couplings between a protected terminal and other terminals in an integrated controller of a power supply. Offset and clamp circuitry may apply a positive or negative offset voltage and clamp current to one or more terminals of the controller. In the event that a terminal having the offset voltage and clamp current is accidentally coupled to the protected terminal, the offset voltage and clamp current may be applied to the protected terminal. The protected terminal may be coupled to a fault detection circuitry operable to detect a fault signal at the protected terminal. The fault detection circuitry of the controller may cause the power supply to shut down in response to a detection of the fault signal at the protected terminal or may cause the power supply to shut down in response to a detection of a predefined threshold number of cycles in which the fault signal is detected.

摘要翻译： 这涉及在电源的集成控制器中检测受保护终端与其他终端之间的不期望的耦合。 偏移和钳位电路可以向控制器的一个或多个端子施加正或负偏移电压和钳位电流。 在具有偏移电压和钳位电流的端子意外地耦合到受保护的端子的情况下，可以将偏移电压和钳位电流施加到受保护的端子。 受保护终端可以耦合到可操作以检测受保护终端处的故障信号的故障检测电路。 控制器的故障检测电路可以响应于检测到受保护终端处的故障信号而导致电源关闭，或者可以响应于检测到预定义的阈值数量的周期而导致电源关闭 检测到故障信号。

公开(公告)号：US20130250457A1

公开(公告)日：2013-09-26

申请号：US13893138

申请日：2013-05-13

申请人： Power Integrations, Inc.

发明人： Yury GAKNOKI ,  Yue ZHANG ,  Mingming MAO

IPC分类号： H02M1/32

CPC分类号： H02M1/32 ,  H02H7/1255 ,  H02M3/33569

摘要： This relates to detecting unwanted couplings between a protected terminal and other terminals in an integrated controller of a power supply. Offset and clamp circuitry may apply a positive or negative offset voltage and clamp current to one or more terminals of the controller. In the event that a terminal having the offset voltage and clamp current is accidentally coupled to the protected terminal, the offset voltage and clamp current may be applied to the protected terminal. The protected terminal may be coupled to a fault detection circuitry operable to detect a fault signal at the protected terminal. The fault detection circuitry of the controller may cause the power supply to shut down in response to a detection of the fault signal at the protected terminal or may cause the power supply to shut down in response to a detection of a predefined threshold number of cycles in which the fault signal is detected.

摘要翻译： 这涉及在电源的集成控制器中检测受保护终端与其他终端之间的不期望的耦合。 偏移和钳位电路可以向控制器的一个或多个端子施加正或负偏移电压和钳位电流。 在具有偏移电压和钳位电流的端子意外地耦合到受保护的端子的情况下，可以将偏移电压和钳位电流施加到受保护的端子。 受保护终端可以耦合到可操作以检测受保护终端处的故障信号的故障检测电路。 控制器的故障检测电路可以响应于检测到受保护终端处的故障信号而导致电源关闭，或者可以响应于检测到预定义的阈值数量的周期而导致电源关闭 检测到故障信号。

公开(公告)号：US20110110128A1

公开(公告)日：2011-05-12

申请号：US12615008

申请日：2009-11-09

申请人： Randhir S. Malik ,  James L. Adams, JR.

发明人： Randhir S. Malik ,  James L. Adams, JR.

IPC分类号： H02H7/125 ,  H02H3/027

CPC分类号： H02H7/1255 ,  H02H3/027

摘要： A system includes an electrical component, a MOV, a voltage sensor, and a circuit. The MOV is connected in parallel to the electrical component. The voltage sensor detects a voltage over the MOV and the electrical component. The circuit removes power in response to the voltage sensor detecting the voltage over the MOV and the electrical component being greater than a threshold voltage for a length of time greater than a threshold length of time. Removing power prevents the MOV from releasing one or more of smoke, smell, and sound. The MOV is thus not damaged as a result of a power surge. The system may be a power supply, or another type of electrical system. The electrical component may be a capacitor, or another type of electrical component.

摘要翻译： 系统包括电气部件，MOV，电压传感器和电路。 MOV与电气部件并联连接。 电压传感器检测MOV和电气部件上的电压。 电路响应于电压传感器检测到MOV上的电压并且电气部件大于阈值电压大于阈值时间长度的时间，来消除电力。 去除电源可防止MOV释放一个或多个烟雾，嗅觉和声音。 因此MOV不会因电源浪涌而损坏。 该系统可以是电源或另一种类型的电气系统。 电气部件可以是电容器或另一种类型的电气部件。

公开(公告)号：US5872707A

公开(公告)日：1999-02-16

申请号：US932958

申请日：1997-09-18

申请人： Gunnar Asplund

发明人： Gunnar Asplund

IPC分类号： H02H9/02 ,  H02H7/00 ,  H02H7/122 ,  H02H7/125 ,  H02J3/36 ,  H02M7/5387 ,  H02M7/757 ,  H02H7/12

CPC分类号： H02H7/1225 ,  H02J3/36 ,  H02M7/5387 ,  H02M7/757 ,  H02H7/1255 ,  Y02E60/60

摘要： A plant for transmitting electric power having an alternating voltage network with at least one phase and at least one VSC converter is provided. The converter has at least one phase leg with two current valves connected in series. Each phase leg is connected at a point between the two current valves to a respective phase of the alternating voltage network. The plant also comprises at least one additional phase leg in the converter more than the number of phases of the alternating voltage network and a means for disconnecting a phase leg from its respective phase and for connecting the additional phase leg at a point between its two current valves to the disconnected phase.

摘要翻译： 提供一种用于传输具有至少一个相位和至少一个VSC转换器的具有交流电压网络的电力的设备。 转换器具有至少一个相位支路，其中两个电流阀串联连接。 每个相支路在两个电流阀之间的一点处连接到交流电压网络的相应相。 该设备还包括转换器中的至少一个附加相支路，多于交流电压网络的相数，以及用于将相支路与其相位相分离的装置，以及用于在其两个电流之间的点处连接附加相支线 阀门到断开的阶段。

公开(公告)号：US5552952A

公开(公告)日：1996-09-03

申请号：US327759

申请日：1994-10-21

申请人： Kenneth C. Kramer ,  Roy S. Baker

发明人： Kenneth C. Kramer ,  Roy S. Baker

IPC分类号： H02H3/08 ,  H02H3/10 ,  H02H3/14 ,  H02H3/16 ,  H02H3/20 ,  H02H3/24 ,  H02H3/347 ,  H02H7/122 ,  H02H7/125 ,  H02H3/00

CPC分类号： H02H7/1255

摘要： A protection circuit for a bridge rectifier having a plurality of ac inputs coupled to a plurality of line voltages, and a dc output, comprises monitoring circuits coupled to the line voltages for monitoring the line voltages and generating sequential line-to-line voltage signals, conduction circuits coupled to the monitoring circuits for conducting that portion of each of the sequential line-to-line voltage signals having a given polarity, the conducting circuits generating sequential half wave voltage signals having a given polarity magnitude, and discriminating circuits coupled to the conducting circuits for discriminating a faulted rectifier by monitoring the given polarity magnitude of each of the sequential half wave voltage signals. The discriminating circuits generate a protection signal in response to one of the magnitudes of the sequential half wave voltages signals being less than a threshold.

摘要翻译： 一种用于具有耦合到多个线路电压的多个交流输入和直流输出的桥式整流器的保护电路，包括监控与线路电压相关联的电路，用于监视线路电压并产生顺序的线间电压信号， 耦合到监控电路的导通电路，用于传导具有给定极性的每个顺序线间电压信号的那部分，导电电路产生具有给定极性幅度的顺序半波电压信号，以及鉴别电路耦合到导通 用于通过监视每个顺序半波电压信号的给定极性幅度来识别故障整流器的电路。 识别电路响应于顺序半波电压信号的大小之一小于阈值而产生保护信号。