公开(公告)号：US20240275264A1

公开(公告)日：2024-08-15

申请号：US18434079

申请日：2024-02-06

申请人： Robert Bosch GmbH

发明人： Joerg Schneider ,  Johannes Swoboda ,  Thomas Schaedlich ,  Thomas Barabas

IPC分类号： H02M1/08 ,  H02H3/02 ,  H02H3/027 ,  H02H3/05 ,  H02H3/24 ,  H02H5/04

CPC分类号： H02M1/08 ,  H02H3/023 ,  H02H3/027 ,  H02H3/05 ,  H02H3/24 ,  H02H5/041

摘要： A circuit arrangement and an electrical system that includes a semiconductor switch (10), a gate driver (20), a power supply (30), a control unit (40), a monitoring unit (50) and a shutdown device (60). The semiconductor switch (10) is configured to be arranged in a circuit including a power source (70) and a load (80), and to close and interrupt the circuit as a function of a control of a gate connection (12) of the semiconductor switch (10). The power supply (30) powers the gate driver (20). The control unit (40) controls the gate driver (20) to open and close the semiconductor switch (10). The monitoring unit (50) determines a request for the redundant interruption of the circuit based on predefined criteria. The shutdown device (60) shuts down a gate voltage applied to the gate connection (12) in response to a request for the redundant interruption of the circuit.

公开(公告)号：US20230216291A1

公开(公告)日：2023-07-06

申请号：US17928537

申请日：2021-03-30

申请人： LS ELECTRIC CO., LTD.

发明人： Jungwook SIM ,  Jaeho LEE ,  Woonghyeob SONG ,  Sunghee KANG

IPC分类号： H02H7/20 ,  H02M1/34 ,  H03K17/567 ,  H02H3/027 ,  H02H3/05

CPC分类号： H02H7/20 ,  H02M1/34 ,  H03K17/567 ,  H02H3/027 ,  H02H3/05

摘要： The present disclosure relates to a solid insulated switch using a semiconductor comprising a main circuit unit connected between systems on both sides thereof, and which has a first semiconductor and a second semiconductor arranged in a series; a snubber circuit having a capacitor and a resistor arranged in a series, one end connected in parallel to the front end of the first semiconductor switch, and the other end connected in parallel to the rear end of the second semiconductor switch; a freewheeling circuit, having a diode and a resistor arranged in a series, one end connected to a common contact between the first semiconductor switch and the second semiconductor switch, and the other end connected to the ground; and a mechanical switch for ensuring physical insulation after fault current interruption.

公开(公告)号：US10985546B2

公开(公告)日：2021-04-20

申请号：US16252651

申请日：2019-01-20

申请人： Excelitas Technologies Corp.

发明人： John E. Waldron ,  Kenneth Brandmier ,  James K. Azotea

IPC分类号： H02H3/033 ,  H02H3/08 ,  H02H3/20 ,  H03K17/0416 ,  H02H3/027 ,  H02H3/44 ,  H03K17/567

摘要： A circuit including a source, a load, and an isolation circuit for controllably isolating the load from the source. The isolation circuit is disposed between the source and the load. The isolation circuit includes at least one insulated-gate bipolar transistor (IGBT) and at least one gate turn-off thyristor (GTO) in parallel with the insulated-gate bipolar transistor. When no fault condition exists, the GTO is configured to be ON to couple the load to the source. When a fault condition exists, the at least one IGBT is configured to turn ON. After the at least one IGBT turns ON, the at least one GTO is configured to turn OFF. After a predetermined amount of time, reflecting the post fabrication alteration to the GTO's minority carrier lifetime (e.g. electron irradiation), after the at least one GTO turns OFF, the at least one IGBT is configured to turn OFF. Alternatively, the circuit is used as an inverter switch, where at the command to turn ON is supplied, the at least one IGBT is turned ON, followed by the at least one SGTO. When commanded to turn OFF the at least one SGTO is turned OFF followed by the at least one IGBT. This alternative configuration allows the robust, controllable switching speeds of IGBTs and the superior conduction efficiency of SGTOs. The two configurations mentioned above utilize a wide range of SGTO performance, thus the ability to control the SGTOs turn-off speed by reducing its minority carrier lifetime after the device is processed is of large importance. The efficiency of all uses of the circuit can be optimized with the judicious selection of SGTO minority carrier lifetime and the ratio of active area between the SGTO and IGBT devices. In all cases there is a balance between the time the circuit can achieve hard turn-off without current commutation, the conduction efficiency of the circuit and the maximum amount of controllable current. In all cases both the conduction efficiency of the circuit is higher than an IGBT-only based circuit, and the switching performance is higher than a GTO-only based circuit.

公开(公告)号：US09871453B2

公开(公告)日：2018-01-16

申请号：US15267487

申请日：2016-09-16

申请人： Richtek Technology Corporation

发明人： Isaac Y. Chen

IPC分类号： H02M3/335 ,  H02H3/027 ,  H02H7/12 ,  H02M1/00 ,  H02M1/32

CPC分类号： H02M3/33507 ,  H02H3/027 ,  H02H7/1213 ,  H02M3/33523 ,  H02M2001/0032 ,  H02M2001/325 ,  Y02B70/16

摘要： A feedback signal stabilized by a capacitor and related to an output voltage of a power converter is used to acquire the output power information of the power converter, and a control circuit uses a second clock not related to the switching frequency of the power converter to count a duration time of the feedback signal being higher than a threshold. When the duration time is higher than a preset time, an abnormal output power of the power converter is distinguished and the power converter will be turned off. The feedback signal will not vary severely even if the output terminal of the power converter is interfered, and the counted duration time will not be influenced when the switching frequency is changing caused by a load changing.

公开(公告)号：US20170005579A1

公开(公告)日：2017-01-05

申请号：US15267487

申请日：2016-09-16

申请人： Richtek Technology Corporation

发明人： Isaac Y. CHEN

IPC分类号： H02M3/335 ,  H02H3/027 ,  H02H7/12

CPC分类号： H02M3/33507 ,  H02H3/027 ,  H02H7/1213 ,  H02M3/33523 ,  H02M2001/0032 ,  H02M2001/325 ,  Y02B70/16

摘要： A feedback signal stabilized by a capacitor and related to an output voltage of a power converter is used to acquire the output power information of the power converter, and a control circuit uses a second clock not related to the switching frequency of the power converter to count a duration time of the feedback signal being higher than a threshold. When the duration time is higher than a preset time, an abnormal output power of the power converter is distinguished and the power converter will be turned off. The feedback signal will not vary severely even if the output terminal of the power converter is interfered, and the counted duration time will not be influenced when the switching frequency is changing caused by a load changing.

摘要翻译： 使用由电容器稳定并与功率转换器的输出电压相关的反馈信号来获取功率转换器的输出功率信息，并且控制电路使用与功率转换器的开关频率无关的第二时钟来计数 反馈信号的持续时间高于阈值。 当持续时间高于预设时间时，功率转换器的异常输出功率被区分，功率转换器将被关闭。 即使电源转换器的输出端子受到干扰，反馈信号也不会严重变化，而当负载变化导致开关频率变化时，计数持续时间不会受到影响。

公开(公告)号：US09306383B2

公开(公告)日：2016-04-05

申请号：US14341926

申请日：2014-07-28

申请人： Sanken Electric Co., LTD.

发明人： Osamu Ohtake

IPC分类号： H02H3/00 ,  H02H3/027 ,  H02H3/12 ,  H02H3/26 ,  G05D25/02 ,  H05B33/08

CPC分类号： H02H3/027 ,  G05D25/02 ,  H02H3/12 ,  H02H3/26 ,  H05B33/0818 ,  H05B33/0884 ,  Y02B20/341

摘要： A low current protection circuit is configured to detect a lowering of a load current flowing a load to perform a low current protection operation and includes: a load current detection configured to detect a load current; a low current detection configured to detect a lowering of the load current by comparing the load current detected by the load current detection unit and a preset reference value; a protection unit configured to perform the low current protection operation when the lowering of the load current is detected by the low current detection unit; and a masking unit configured to mask the low current protection operation of the protection unit from when the lowering of the load current is detected by the low current detection unit to when a masking time period depending on a duty ratio of the external pulse signal elapses.

摘要翻译： 低电流保护电路被配置为检测流过负载的负载电流的降低以执行低电流保护操作，并且包括：负载电流检测，被配置为检测负载电流; 低电流检测，被配置为通过比较由负载电流检测单元检测的负载电流和预设的参考值来检测负载电流的降低; 保护单元，被配置为当由所述低电流检测单元检测到所述负载电流的下降时，执行所述低电流保护操作; 以及掩蔽单元，其被配置为掩蔽所述保护单元的低电流保护操作，以便当由所述低电流检测单元检测到所述负载电流的下降时，到当取决于所述外部脉冲信号的占空比的掩蔽时间周期时。

公开(公告)号：US20150116882A1

公开(公告)日：2015-04-30

申请号：US14069175

申请日：2013-10-31

申请人： ANALOG DEVICES, INC.

发明人： Derek F. Bowers

IPC分类号： H02H3/04 ,  H02H3/027

CPC分类号： H02H5/044 ,  H01L23/34 ,  H01L27/0259 ,  H01L2924/0002 ,  H01L2924/00

摘要： Apparatus and methods for time-delayed thermal overload protection are provided. In one aspect, an integrated circuit includes a primary circuit disposed in a primary circuit region on a substrate, and a thermal protection circuit disposed in a thermal protection circuit region on the substrate and in thermal communication with the primary circuit. The thermal protection circuit includes a temperature sensing circuit configured to sense a temperature of the thermal protection circuit region and to activate a temperature warning signal when the temperature exceeds a temperature threshold level. The thermal protection circuit additionally includes a time delay circuit configured to activate a shut off signal to disable at least a portion of the primary circuit when the temperature warning signal is active for a duration exceeding a time delay.

摘要翻译： 提供了延时热过载保护的装置和方法。 一方面，集成电路包括设置在基板上的初级电路区域中的初级电路和设置在基板上的热保护电路区域中并与初级电路热连通的热保护电路。 热保护电路包括温度检测电路，其被配置为感测热保护电路区域的温度，并且当温度超过温度阈值电平时激活温度警告信号。 热保护电路还包括时间延迟电路，其被配置为当温度警告信号在超过时间延迟的持续时间内被激活时激活截止信号以禁用主电路的至少一部分。

公开(公告)号：US08284535B2

公开(公告)日：2012-10-09

申请号：US12271019

申请日：2008-11-14

申请人： Paul A. Reid ,  Robert Erger

发明人： Paul A. Reid ,  Robert Erger

IPC分类号： H02H3/00 ,  H02H3/027

CPC分类号： H02H1/06 ,  H02H3/05

摘要： A circuit breaker capable of microcontroller-based fault detection having a backup circuit for causing the circuit to trip in response to a microcontroller fault or a failure of a regulated power supply powering the microcontroller. The circuit breaker includes an RC circuit connected to an SCR. The resistor of the RC circuit is connected between the anode and gate of the SCR, and the capacitor is connected between the gate and cathode of the SCR. The microcontroller has a first pin coupled to the RC circuit, which is initially in a high input impedance state. In the event of a microcontroller fault or power supply failure, the capacitor will charge to a voltage sufficient to activate the SCR and trip the breaker. If the microcontroller startup routine is successful, the pin is configured as an output and is pulled low, shorting out the capacitor.

摘要翻译： 具有基于微控制器的故障检测的断路器具有备用电路，用于使电路响应于微控制器故障或为微控制器供电的稳压电源的故障而跳闸。 断路器包括连接到SCR的RC电路。 RC电路的电阻连接在SCR的阳极和栅极之间，电容器连接在SCR的栅极和阴极之间。 微控制器具有耦合到RC电路的第一引脚，其最初处于高输入阻抗状态。 在发生单片机故障或电源故障的情况下，电容器将充电至足以启动SCR并跳闸的电压。 如果单片机启动程序成功，则该引脚被配置为输出并被拉低，使电容短路。

公开(公告)号：US08116056B2

公开(公告)日：2012-02-14

申请号：US12270997

申请日：2008-11-14

申请人： Randy Gass ,  Issa Drame

发明人： Randy Gass ,  Issa Drame

IPC分类号： H02H3/027

CPC分类号： H02H1/06 ,  H02H3/05

摘要： A circuit breaker capable of microcontroller-based fault detection having a backup circuit for causing the circuit breaker to trip in response to a microcontroller fault, including a timing circuit powered by a power supply and a microcontroller. The timing circuit is electrically coupled to an SCR that causes the circuit breaker to trip. The timing circuit includes a BJT coupled to the gate of the SCR. The microcontroller has a first output coupled to the timing circuit and a second output coupled to the SCR. The first output is coupled to a node between a resistor and a grounded capacitor in the timing circuit, and the node is coupled to a gate of the SCR and to a base of the transistor. A voltage develops at the node sufficient to cause the gate of the SCR to turn on unless the microcontroller pulls the first high-impedance output to a logic low state.

摘要翻译： 具有基于微控制器的故障检测的断路器具有备用电路，用于使断路器响应于微控制器故障跳闸，包括由电源和微控制器供电的定时电路。 定时电路电耦合到SCR，导致断路器脱扣。 定时电路包括耦合到SCR的栅极的BJT。 微控制器具有耦合到定时电路的第一输出和耦合到SCR的第二输出。 第一输出端耦合到定时电路中的电阻器和接地电容器之间的节点，并且该节点耦合到SCR的栅极和晶体管的基极。 在节点处产生的电压足以使SCR的栅极导通，除非微控制器将第一个高阻抗输出端拉至逻辑低电平状态。

公开(公告)号：US08059378B2

公开(公告)日：2011-11-15

申请号：US12350542

申请日：2009-01-08

申请人： Zhenning Liu ,  Randy Fuller

发明人： Zhenning Liu ,  Randy Fuller

IPC分类号： H02H3/027

CPC分类号： H02H1/04 ,  H02H9/042

摘要： A solid state power controller (SSPC) often contains electronic circuitry which could be damaged or upset by the excessive transient voltages induced by the lightning and SSPC could result in undesirable (or nuisance) trips due to lightning strikes. The present invention is intended to address the “nuisance trip” issue, by relying on the lightning indicative signals to distinguish between the transient current surge due to the lightning strike and that due to the circuit fault in the power distribution channel. The present invention utilizes either the break-down current in a transient voltage suppression (TVS) device, or a voltage signal at the output of the SSPC as the indication of lightning strike, to avoid nuisance trips.

摘要翻译： 固态功率控制器（SSPC）通常包含电子电路，其可能被雷击引起的过度瞬态电压损坏或扰乱，并且SSPC可能导致由于雷击而导致的不期望的（或妨扰）跳闸。 本发明旨在通过依靠闪电指示信号来区分由于雷击引起的瞬态电流浪涌和由于配电通道中的电路故障而引起的“烦扰旅程”问题。 本发明利用瞬态电压抑制（TVS）装置中的分解电流或SSPC输出端的电压信号作为雷击的指示，以避免妨碍跳闸。