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公开(公告)号：US11600984B1
公开(公告)日：2023-03-07
申请号：US17682598
申请日：2022-02-28
Applicant: Chengli Li
Inventor： Chengli Li , Long Chen
Abstract: A leakage current detection and interruption (LCDI) device for a power cord includes a switch module that controls an electrical connection of first and second power supply lines between input and an output ends; a leakage current detection module, including first and second leakage current detection lines, which respectively cover the first and second power supply lines, and are respectively configured to detect leakage current signals on the first and second power supply lines and to generate self-test fault signals in response to the first and second leakage current detection lines having an open circuit; and a drive module which receives the first and/or second leakage current signal and the first and/or second self-test fault signal, and drives the switch module to disconnect the electrical connection in response to these signals. The LCDI device can individually detect leaks on the two power supply lines and open circuit on the two leakage current detection lines.
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公开(公告)号：US11489331B2
公开(公告)日：2022-11-01
申请号：US17349133
申请日：2021-06-16
Applicant: Chengli Li
Inventor： Chengli Li , Long Chen
Abstract: A leakage current detection and protection device includes a leakage current detection module for generating a detection feedback signal when detecting a leakage current on the power supply lines, wherein the power supply lines supply a working power to the leakage current detection module during half of the AC power cycles; a self-test module for testing whether the leakage current detection module is faulty based on the detection feedback signal, which includes: a simulated leakage current generating circuit for generating a simulated leakage current signal; a fault signal generating module for generating a self-test fault signal when the leakage current detection module has a fault; and a self-test compensation module for supplying an auxiliary working power to the leakage current detection module so the leakage current detection module is in a working state whenever the simulated leakage current is generated. This prevents misjudgment by the leakage current detection module.
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公开(公告)号：US11444448B2
公开(公告)日：2022-09-13
申请号：US17314976
申请日：2021-05-07
Applicant: Chengli Li
Inventor： Chengli Li , Long Chen
Abstract: An leakage current detection and protection device includes a leakage current detection module for detecting a leakage current on the power supply lines and generating a detection feedback signal in response thereto, a self-test module for testing whether the leakage current detection module is faulty, and a trip module for disconnecting the power supply lines in response to the self-test fault signal. The self-test module includes a simulated leakage current trigger circuit for generating a simulated leakage current trigger signal, a simulated leakage current generating circuit for generating a simulated leakage current signal in response to the simulated leakage current trigger signal, a trigger signal turn-off module for turning off the simulated leakage current trigger signal in response to the detection feedback signal, and a fault signal generating module for detecting a fault in the leakage current detection module and generating a self-test fault signal in response thereto.
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公开(公告)号：US11243265B2
公开(公告)日：2022-02-08
申请号：US17009316
申请日：2020-09-01
Applicant: Chengli Li
Inventor： Chengli Li , Shengyun Nie
Abstract: An intelligent leakage current detection and interruption device for a power cord, including a switch module configured to control electrical connection of first and second power lines between input and output ends; a leakage current detection module, including first and second leakage current detection lines coupled in series, configured to detect a leakage current on the first and second power lines, respectively; a detection monitoring module, coupled in series to the first and second leakage current detection lines and to the first and second power lines, configured to detect an open circuit condition in the first or second leakage current detection line; and a drive module, coupled to the switch module, the leakage current detection module and the detection monitoring module, configured to drive the switch module to cut off power to the output end in response to any detected leakage current or open circuit condition.
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公开(公告)号：US09871366B1
公开(公告)日：2018-01-16
申请号：US15586952
申请日：2017-05-04
Applicant: Chengli Li
Inventor： Chengli Li , Guolan Yue
CPC classification number: H02H3/044 , G01R31/025 , G01R31/42 , H02H1/0007 , H02H1/06 , H02H3/08
Abstract: A leakage current detection device includes a switching module coupled between power input and output terminals, for controlling the electrical connection between the input and output terminals; a leakage current detection module, including a switch driving component, configured to control the switching module based on working periods of the switch driving component and based on whether a leakage current signal is detected; and a first self testing module, coupled to the leakage current detection module, for periodically generating a self testing pulse signal as a simulated leakage current signal. The first self testing module includes: a periodic timing circuit and a self testing pulse signal generating circuit coupled to each other, where the periodic timing circuit controls the period of the self testing pulse signal. The device provides enhanced safety protection.
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Patent Agency Ranking
公开(公告)号：US07518063B2
公开(公告)日：2009-04-14
申请号：US11739677
申请日：2007-04-24
Applicant: Long Zhang , Chengli Li
Inventor： Long Zhang , Chengli Li
IPC: H01B11/02
CPC classification number: H01B7/328
Abstract: A power cord with leakage current detection function includes three copper wires for carrying power and at least one leakage current detection conductor for detecting leakage current. Each copper wire is surrounded by an insulating layer. At least two of the insulating layers are each surrounded by a metal conductive layer. The leakage current detection conductor is adjacent and in electrical contact with the two metal conductive layers. An outer insulating layer encloses the three wires and the leakage current detection conductor. The metal conductive layers are made of a thin copper foil, tin foil, aluminum foil, or conductive rubber. The leakage current detection conductor may be formed of copper wires or aluminum wires. Such a power cord provides low cost and reliability, and can quickly and accurately detect leakage current in the cord.
Abstract translation: 具有泄漏电流检测功能的电源线包括用于承载电力的三根铜线和用于检测泄漏电流的至少一个漏电流检测导体。 每个铜线被绝缘层包围。 至少两个绝缘层被金属导电层包围。 泄漏电流检测导体与两个金属导电层相邻并且电接触。 外部绝缘层包围三条导线和漏电流检测导体。 金属导电层由薄铜箔，锡箔，铝箔或导电橡胶制成。 泄漏电流检测导体可以由铜线或铝线形成。 这样的电源线提供低成本和可靠性，并可以快速准确地检测电线中的漏电流。
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公开(公告)号：US20080094764A1
公开(公告)日：2008-04-24
申请号：US11739665
申请日：2007-04-24
Applicant: Long Zhang , Chengli Li
Inventor： Long Zhang , Chengli Li
CPC classification number: H01R13/665 , H01R13/6691 , Y10T29/5313
Abstract: A power plug includes a base, an upper cover attached to the base, a base-side cover adjacent the base and removably attached to the upper cover, an output cord, a leakage current detection and protection circuit for detecting a leakage current in the output cord, and an electrical connection mechanism for electrically connecting and disconnecting an input side and an output of the power plug. The leakage current detection and protection circuit and the electrical connection mechanism are attached to the base and disposed substantially within a space enclosed by the base and the upper cover. A plurality of connecting ends of the circuit extend from the space enclosed by the base and the upper cover into a space enclosed by the base-side cover and the upper cover. Wires of the output cord are connected to the connecting ends, respectively.
Abstract translation: 电源插头包括基座，附接到基座的上盖，邻近底座的基座盖和可拆卸地附接到上盖，输出线，漏电流检测和保护电路，用于检测输出中的漏电流 以及用于电连接和断开电源插头的输入侧和输出的电连接机构。 泄漏电流检测和保护电路和电连接机构附接到基座并且基本上设置在由基座和上盖封闭的空间内。 电路的多个连接端从由基座和上盖封闭的空间延伸到被基座盖和上盖封闭的空间中。 输出线的电线分别连接到连接端。
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公开(公告)号：US06580344B2
公开(公告)日：2003-06-17
申请号：US09785886
申请日：2001-02-15
Applicant: Chengli Li
Inventor： Chengli Li
IPC: H01H7300
CPC classification number: H01H83/04 , H01R13/7135
Abstract: A new and improved type of ground fault interruption receptacle is mainly consists of an upper housing, a middle supporter and a lower holder. Two sets of female power-output socket 5, 6, a simulation test button (i.e. test button for fault detecting) and a reset button are disposed on the upper housing. A metal mounting plate is disposed between the upper housing and the middle supporter. At the two sides of the middle supporter is disposed a pair of metal conductors. Between the middle supporter and the lower holder is disposed a printed circuit board, and thereon a differential transformer within which an iron core is inserted, a reset guide member and a flat spring type of resilient off locking switch are arranged. Using the differential transformer and the resilient off locking switch, the receptacle of the present invention may detect whether the fault current exists and whether the damage of a certain element or member for power transmission occurs. If so, the receptacle of the present invention can electrically disconnect the power-out connectors with the relevant power-input connectors so as to accomplish the ground fault interruption.
Abstract translation: 一种新的改进型接地故障中断插座主要由上部外壳，中间支架和下部支架组成。 两组母电源输出插座5,6，模拟测试按钮（即用于故障检测的测试按钮）和复位按钮设置在上壳体上。 金属安装板设置在上壳体和中间支撑件之间。 在中间支架的两侧设置一对金属导体。 在中间支撑件和下支架之间设置有印刷电路板，并且其上布置有插入铁芯的差动变压器，复位引导构件和弹簧式弹性关闭开关。 使用差动变压器和弹性关闭开关，本发明的插座可以检测故障电流是否存在，以及是否发生某一元件或部件用于电力传输的损坏。 如果是这样，本发明的插座可以通过相关的电力输入连接器将断电连接器电断开，从而实现接地故障中断。
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公开(公告)号：US12206231B2
公开(公告)日：2025-01-21
申请号：US17706138
申请日：2022-03-28
Applicant: Chengli Li
Inventor： Chengli Li , Long Chen , Guolan Yue
Abstract: A leakage current detection and interruption device includes a switch module for controlling electrical connection of power supply lines between input and output ends; a leakage current detection module, including first and second leakage current detection lines respectively covering the first and second power supply lines, to detect leakage current thereon and to generate respective first and second leakage signals in response thereto; a signal processing module, coupled to the leakage current detection module to receive the first and/or second leakage signals and to generate a leakage fault signal in response thereto; and a trigger module, coupled to the switch module and the signal processing module, to receive the leakage fault signal and in response thereto, to drive the switch module to disconnect the electrical connection to the output end. The device can detect current leaks on the two power supply lines and is simple, low-cost and reliable.
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20.发明授权公开(公告)号：US11658475B1
公开(公告)日：2023-05-23
申请号：US17558357
申请日：2021-12-21
Applicant: Chengli Li
Inventor： Chengli Li , Long Chen
CPC classification number: H02H3/16 , H02H1/0007
Abstract: A leakage current detection and interruption device coupled to power supply lines, including a leakage current detection module for generating a leakage current fault signal when detecting leakage currents on the lines; a trip drive module responsive to the leakage current fault signal to drive a switch to disconnect power on the lines, the trip drive module including a first semiconductor device responsive to the leakage current fault signal to cause a current in a first coil to drive the switch; a coil function detection module for generating a coil fault signal when detecting a fault in the first coil; a self-test module for generating a self-test fault signal when detecting a fault in the leakage current detection module or the first semiconductor device; and a detection drive module for driving the switch to disconnect power in response to the coil fault signal or the self-test fault signal.
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