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公开(公告)号：US20150055259A1
公开(公告)日：2015-02-26
申请号：US14164196
申请日：2014-01-25
发明人： Xiangning Cao , Yong Wang
IPC分类号： H02H9/04
CPC分类号： H02H9/049 , H01L27/0292 , H02H9/047
摘要： A whole-chip Electrostatic Discharge (ESD) protection circuit and protection method are provided. The whole-chip ESD protection circuit comprises: input/output (I/O) units located between a power line and a grounding wire; a power clamp circuit located between the power line and the grounding wire and connected to the I/O units, any power clamp circuit being shared by multiple I/O units; and an ESD trigger circuit located between the power line and the grounding wire. The ESD trigger circuit generates an ESD trigger signal when an ESD events occurs and transmits the ESD trigger signal to the power clamp circuit and each I/O unit so that the power clamp circuit and each I/O unit form a current discharge path from the power line to the grounding wire respectively. Compared with the prior art, the present invention fully utilizes an existing driving transistor in the I/O unit to realize efficient whole-chip ESD protection and avoids adding too many power clamp circuits in the whole chip with regard to ESD, thereby reducing the overall size of the chip and lowering the cost.
摘要翻译： 提供全片静电放电（ESD）保护电路和保护方法。 全芯片ESD保护电路包括：位于电源线和接地线之间的输入/输出（I / O）单元; 一个位于电源线和接地线之间并连接到I / O单元的功率钳位电路，任何功率钳位电路由多个I / O单元共享; 以及位于电力线和接地线之间的ESD触发电路。 当ESD事件发生时，ESD触发电路产生ESD触发信号，并将ESD触发信号发送到功率钳位电路和每个I / O单元，使得功率钳位电路和每个I / O单元形成来自 电源线分别接地线。 与现有技术相比，本发明充分利用了I / O单元中现有的驱动晶体管，实现了高效的全芯片ESD保护，避免了在整个芯片中增加ESD功耗太多的功率钳位电路，从而降低了整体 芯片的尺寸和成本降低。
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公开(公告)号：US20140111895A1
公开(公告)日：2014-04-24
申请号：US14145067
申请日：2013-12-31
发明人： Xuewen PENG , Wenzong Cao
IPC分类号： H02H9/02
摘要： A surge protection circuit, related to the power electronics field. The surge protection circuit includes: an input configured to provide direct current power supply, an output configured to connect to a next circuit, and a cutoff circuit connected to the output; the surge protection circuit further includes: a discharge circuit connected between the input and the cutoff circuit; the discharge circuit includes: a diode and a field-effect transistor; the cathode of the diode is connected to the positive end of the input, and the anode of the diode is connected to the source of the field-effect transistor; the gate of the field-effect transistor is connected to the positive end of the input, the drain of the field-effect transistor is connected to the negative end of the input, and the direction of the parasitic diode of the field-effect transistor is opposite to the direction of the diode.
摘要翻译： 电涌保护电路，涉及电力电子领域。 浪涌保护电路包括：被配置为提供直流电源的输入，被配置为连接到下一个电路的输出和连接到输出的断开电路; 所述浪涌保护电路还包括：放电电路，连接在所述输入和所述截止电路之间; 放电电路包括：二极管和场效应晶体管; 二极管的阴极连接到输入的正极，二极管的阳极连接到场效应晶体管的源极; 场效应晶体管的栅极连接到输入的正极，场效应晶体管的漏极连接到输入的负端，场效应晶体管的寄生二极管的方向为 与二极管方向相反。
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公开(公告)号：US07545612B2
公开(公告)日：2009-06-09
申请号：US11109975
申请日：2005-04-20
申请人： Maurizio Nessi , Ezio Galbiati
发明人： Maurizio Nessi , Ezio Galbiati
IPC分类号： H02H5/04
CPC分类号： H02H9/047 , H02H7/0833
摘要： An apparatus is provided for powering at least one electric motor. The apparatus includes at least one driving device for driving the electric motor, a supply path positioned between a supply voltage generator and the at least one driving device, a first circuit, a control device, and a protection device for protecting against over-voltages. The first circuit is inserted in the supply path to enable and prevent the powering of the at least one driving device, and the control device controls at least the first circuit. The protection device includes a second circuit for detecting a current that flows in the supply path from the at least one driving device to the supply voltage generator, and a third circuit for selectively absorbing the current that is detected.
摘要翻译： 提供一种为至少一个电动马达供电的装置。 该装置包括用于驱动电动机的至少一个驱动装置，位于电源电压发生器和至少一个驱动装置之间的供应路径，第一电路，控制装置和用于防止过电压的保护装置。 第一电路插入供应路径中，以便能够和阻止至少一个驱动装置的供电，并且控制装置至少控制第一电路。 保护装置包括用于检测在从至少一个驱动装置到电源电压发生器的供给路径中流动的电流的第二电路，以及用于选择性地吸收检测到的电流的第三电路。
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公开(公告)号：US07495879B2
公开(公告)日：2009-02-24
申请号：US11049902
申请日：2005-02-04
IPC分类号： H01H47/00
摘要： A solid-state magnet control includes a housing and magnet control circuitry mounted within the housing. The magnet control circuitry includes an insulated gate bipolar transistor (IGBT) bridge configuration and DUMP circuitry. The DUMP circuitry inhibits circuit damage to the magnet control circuitry and other components contained within the magnet control caused by overvoltage and/or voltage transients. The magnet control circuitry controls current passing through the magnet. The IGBT bridge configuration includes a LIFT HIGH IGBT, a LIFT LOW IGBT, a CLEAN HIGH IGBT, and a CLEAN LOW IGBT, as well as a capacitor bank. The DUMP circuitry includes a DUMP HIGH IGBT, a discharge diode, and a discharge resistor. The magnet control is configured to provide power loss ride through, ground fault detection, and discharge voltage control, and can accept increased voltage supply to reduce charge-up time of the magnet, and existing operator control inputs through a relay interface.
摘要翻译： 固态磁体控制器包括安装在壳体内的壳体和磁体控制电路。 磁体控制电路包括绝缘栅双极晶体管（IGBT）桥结构和
DUMP 电路。 DUMP 电路抑制磁控制电路和包含在由过压和/或电压瞬变引起的磁体控制内的其他部件的电路损坏。 磁体控制电路控制通过磁体的电流。 IGBT桥结构包括一个 LIFT HIGH IGBT，一个 LIFT LOW IGBT，一个 CLEAN HIGH IGBT和一个 CLEAN LOW < IGBT，以及电容器组。 DUMP 电路包括一个 DUMP HIGH IGBT，一个放电二极管和一个放电电阻。 磁铁控制器配置为提供功率损耗穿越，接地故障检测和放电电压控制，并且可以接受增加的电压供应，以减少磁体的充电时间，以及通过继电器接口的现有操作员控制输入。 -
5.发明申请公开(公告)号：US20060181156A1
公开(公告)日：2006-08-17
申请号：US11341112
申请日：2006-01-27
申请人： Jens Titschert , Achim Sondermann
发明人： Jens Titschert , Achim Sondermann
IPC分类号： H02H3/24
CPC分类号： H02H9/008 , H01F7/18 , H02H3/025 , H02H9/047 , Y10T307/858
摘要： The present invention relates to a protective circuit (30) for intrinsically safe electromagnetic actuators operating at the voltage of a power supply approved for underground mining, for switching electrohydraulic valves in underground mining, comprising a coil (11) connected to a first potential (2) and a second potential (3) of the power supply and associated with at least two spaced-apart short-circuit means (12) connected in parallel with the electromagnetic actuator coil (11) for short-circuiting the coil in the event of a reversal of the potential of the coil voltage. In accordance with the present invention the protective circuit comprises a semiconductor switch (T3) which is inserted between the coil (11) and the second potential (3) and, in the event of a voltage reduction or potential reversal, isolates the coil (11) from the second potential, so that the discharge from the coil (11) has no adverse effect on the energy supply system or the intrinsic safety.
摘要翻译： 本发明涉及一种用于本地安全电磁致动器的保护电路（30），该电磁致动器在批准用于地下采矿的电源的电压下工作，用于在地下采矿中切换电液阀，包括连接到第一电位的线圈（2） ）和电源的第二电位（3）并且与与电磁致动器线圈（11）并联连接的至少两个间隔开的短路装置（12）相关联，用于在线圈的短路 反转线圈电压的电位。 根据本发明，保护电路包括插入在线圈（11）和第二电位（3）之间的半导体开关（T 3），并且在电压降低或电位反转的情况下，隔离线圈 11）从第二电位，使得来自线圈（11）的放电对能量供应系统或本质安全性没有不利影响。
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公开(公告)号：US20060171087A1
公开(公告)日：2006-08-03
申请号：US11045267
申请日：2005-01-31
申请人： Kevin Chen
发明人： Kevin Chen
IPC分类号： H02H9/04
CPC分类号： H02H9/047
摘要： A high voltage protection device applied to a coil driving device of a DC fan and motor. The coil driving device is connected to the high voltage protection device that has an activation control unit connected to the coil driving device, a logic operation unit that has two input terminals connected to a protection activation signal source and the activation control unit, a high voltage protection unit connected to an output terminal of the logic operation unit and the driving device. When the voltage of the coil driving device is higher than a predetermined value, the potential of a digital signal output is adjusted high and input to the logic operation unit. By logic operation performed on the input digital signal and another digital signal obtained from a protection signal source, a signal is generated to activate the high-voltage protection device, and the operation voltage of coil driving device can return to normal value.
摘要翻译： 一种应用于直流风扇和电机的线圈驱动装置的高压保护装置。 线圈驱动装置连接到具有连接到线圈驱动装置的启动控制单元的高压保护装置，具有连接到保护激活信号源和激活控制单元的两个输入端子的逻辑运算单元，高电压 保护单元连接到逻辑运算单元的输出端子和驱动装置。 当线圈驱动装置的电压高于预定值时，数字信号输出的电位被调高并输入到逻辑运算单元。 通过对输入数字信号执行的逻辑运算和从保护信号源获得的另一数字信号，产生信号以激活高压保护装置，线圈驱动装置的工作电压可恢复正常值。
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公开(公告)号：US06888336B2
公开(公告)日：2005-05-03
申请号：US10483575
申请日：2003-02-06
申请人： Jochen Kuehner , Robert Plikat , Klaus Rechberger , Jochen Ruopp
发明人： Jochen Kuehner , Robert Plikat , Klaus Rechberger , Jochen Ruopp
CPC分类号： H02H7/0844 , H02H9/047
摘要： An inverter for an electric machine is specified that includes a plurality of switching elements, in particular six, which are positioned in a bridge circuit and produce a connection between the electric machine and a battery. The switching elements built into the low-side branch of the inverter are ones that are conductive without a control voltage present, i.e., normally-on switching elements. That ensures that if the supply voltage is absent and the electric machine is rotating the windings of the electric machine are short circuited and no overvoltages are able to occur. In normal operation the inverter is operated like a conventional inverter, by clocked actuation, but with reversed actuation of the control electrodes, i.e., with control voltage for non-conductive time phases and without control voltage in conductive phases.
摘要翻译： 规定了一种用于电机的逆变器，其包括位于桥式电路中的多个开关元件，特别是六个开关元件，并产生电机和电池之间的连接。 内置在逆变器的低侧分支中的开关元件是在没有控制电压的情况下是导通的，即正常开关元件。 这确保了如果不存在电源电压并且电机正在旋转，则电机的绕组短路并且不会发生过电压。 在正常操作中，逆变器的工作方式与传统的逆变器一样，通过时钟驱动，但反向驱动控制电极，即具有用于非导通时间相位的控制电压，而在导电阶段没有控制电压。
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公开(公告)号：US20050047048A1
公开(公告)日：2005-03-03
申请号：US10648200
申请日：2003-08-27
申请人： Hsu-Yuan Chin , Wen-Chi Lin
发明人： Hsu-Yuan Chin , Wen-Chi Lin
CPC分类号： H02H9/047 , H02H7/0833
摘要： An over-voltage protection coil control circuit has at least one coil driving circuit, wherein an over-voltage protection circuit is connected to the at least one coil driver circuit. The at least one coil driver circuit consists of a transistor. The over-voltage protection circuit is composed of a Zener diode connected to a power supply and the at least one coil driver circuit. When the coil generates a high inverse emf (electromotive force) due to the inversion of its polarity, the Zener diode conducts and guides the high voltage inverse emf to the power supply.
摘要翻译： 过电压保护线圈控制电路具有至少一个线圈驱动电路，其中过电压保护电路连接至至少一个线圈驱动电路。 至少一个线圈驱动电路由晶体管组成。 过电压保护电路由连接到电源的齐纳二极管和至少一个线圈驱动电路组成。 当线圈由于其极性反转而产生高的反电动势（电动势）时，齐纳二极管导通高压反电动势到电源。
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公开(公告)号：US06850402B2
公开(公告)日：2005-02-01
申请号：US10087632
申请日：2002-03-01
申请人： Terry J. Ahrendt
发明人： Terry J. Ahrendt
CPC分类号： H01H47/325 , H02H9/047 , Y10T307/964
摘要： A solenoid control circuit that includes two switching networks that are selectively opened and closed in a current limit cycle to control the magnitude of the current flowing through the solenoid. The configuration of the switching networks is such that current flows through an energy dissipating resistor only when the solenoid is commanded off by the solenoid control circuit, and not during the current limit cycle. Thus, the energy dissipated by this resistor is reduced relative to other solenoid control circuits, making it more efficient, and reducing EMI emissions from the circuit while providing for a fast solenoid response.
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10.发明授权Circuit for preventing high voltage damage to a MOSFET switch in series with an inductor when current flow is interrupted 有权电流，用于当电流中断时防止与电感器串联的MOSFET开关的高压损坏公开(公告)号：US06697241B1
公开(公告)日：2004-02-24
申请号：US09834416
申请日：2001-04-12
申请人： Gregory J. Smith
发明人： Gregory J. Smith
IPC分类号： H02H320
CPC分类号： H03K17/166 , H02H9/047 , H03K17/0822
摘要： A circuit for preventing high voltage damage to a MOSFET switch in series with an inductor when current flow is interrupted. Specifically, the present invention discloses a protection circuit comprising a PMOS coupled in series to a load, an inductor, and a re-chargeable battery cell. The PMOS is switched to a non-conductive state by a switch in order to prevent over-loading the protection circuit. A clamp circuit temporarily allows the PMOS to conduct when a positive rate change of voltage with respect to time occurs at the gate of the PMOS. The clamp circuit is coupled to the gate of the PMOS. In one embodiment, the clamp circuit has an RC time constant and is comprised of an NMOS, a capacitor, and a pull-down resistor.
摘要翻译： 一种用于当电流中断时防止与电感器串联的MOSFET开关的高压损坏的电路。 具体地，本发明公开了一种保护电路，其包括与负载，电感器和可再充电电池单元串联耦合的PMOS。 通过开关将PMOS切换到非导通状态，以防止保护电路的过载。 当在PMOS的栅极处发生相对于时间的正的电压变化时，钳位电路暂时允许PMOS导通。 钳位电路耦合到PMOS的栅极。 在一个实施例中，钳位电路具有RC时间常数，并且由NMOS，电容器和下拉电阻器组成。
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