Patents Examined by Sreeya Sreevatsa
  • Patent number: 11368017
    Abstract: The present invention discloses a safe operation method for voltage reduction arc suppression of a ground fault phase of a non-effective ground system, for use in ground fault safety operation of a neutral point non-effective ground generator or distribution network. When a single-phase ground fault occurs, an external voltage source is applied at a non-effective ground system side between a bus and the ground, or between a line and the ground, or between a neutral point and the ground, or between a shunting tap of a non-effective ground system side winding of a transformer and the ground, to reduce the fault phase voltage to be lower than the continuous burning voltage of a ground arc, thereby meeting the requirements of long-term non-stop safe operation. The operation means and control method effectively prevent power outages, and improve the reliability and security of power supply.
    Type: Grant
    Filed: July 4, 2018
    Date of Patent: June 21, 2022
    Inventor: Xiangjun Zeng
  • Patent number: 11355300
    Abstract: An exemplary embodiment of active/passive automotive fuse module in accordance with the present disclosure may include an electrically insulating base, a fuse plate including a bus bar portion disposed on a top surface of the base above a projectile cavity formed in the base, the fuse plate further including a fusible portion electrically connected to the bus bar portion and adapted to open when an amount of current flowing through the fuse plate exceeds a current rating of the active/passive automotive fuse module, the active/passive automotive fuse module further including a pyrotechnic interrupter (PI) disposed atop the base and including a projectile positioned above the bus bar portion, the PI configured to drive the projectile through the bus bar portion upon actuation of the PI.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: June 7, 2022
    Assignee: Littelfuse, Inc.
    Inventors: Julio C. Urrea, Gary M. Bold, Juergen Scheele
  • Patent number: 11355920
    Abstract: An improved electric circuit structure for short circuit protection is applicable to examining a device under test, comprising a circuit breaking element, a thermistor, a filtering and rectifying module and a capacitor. A first end of the circuit breaking element is connected to a power source. The filtering and rectifying module is connected to a second end of the circuit breaking element, a ground, a first end of the thermistor and a first end of the capacitor. A second end of the capacitor is connected to a second end of the thermistor. The capacitor is connected in parallel with the device under test. The circuit breaking element disclosed in the present invention is a ceramic tube fuse and forms an open circuit when the device under test forms a short circuit. Meanwhile, the ceramic tube fuse withstands voltage between its first and second end without generating any physical damage.
    Type: Grant
    Filed: July 21, 2020
    Date of Patent: June 7, 2022
    Assignee: Leader Electronics
    Inventors: Shi-Guo Deng, Zuo-Quan Zhou, Jing Feng
  • Patent number: 11348753
    Abstract: A contactor includes a fixed iron core, a movable iron core, an operation coil, a first crossbar, a tripping spring, and a second crossbar. The contactor includes a push spring to push a movable contact toward a fixed contact, a trip coil connected to the fixed contact, and a plunger that is operated by an electromagnetic force generated in the trip coil when a current of a predetermined value or higher flows through the trip coil. The contactor includes an opening lever to push the second crossbar in a direction away from the first crossbar in conjunction with the operation of the plunger.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: May 31, 2022
    Inventors: Takashi Inaguchi, Kazuki Takahashi, Katsuki Hotta, Hiroyuki Nozaki
  • Patent number: 11335492
    Abstract: A solenoid plunger movement detection system and method can include: detecting current supplied to a solenoid with a current sensor; converting the current supplied to the solenoid into a digital signal with a counter coupled to a first comparator; detecting a peak within the digital signal with a peak detector; comparing the peak to the digital signal with a second comparator coupled to the peak detector; measuring a dip from the peak and measuring a trough with the second comparator; generating a fault when the peak and the trough indicate a smooth current ramp to the solenoid; receiving configurable parameters for processing the digital signal with a signal processor; and providing configurable parameters to the counter, the second comparator, the signal processor, or a combination thereof with an interface.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: May 17, 2022
    Inventors: Roberto Casiraghi, Luigi Franchini, Pietro Introini
  • Patent number: 11329436
    Abstract: An electrical contact element for a plug connector includes an electrically conductive base body electrically connected to a mating contact element, the base body having a longitudinal axis extending along a plugging direction between the contact element and the mating contact element, and a first temperature probe and a second temperature probe arranged at a pair of different measurement regions of the contact element spaced apart from each other along the longitudinal axis.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: May 10, 2022
    Inventors: Marco Wolf, Michael Ludwig, Martin Rieder
  • Patent number: 11328884
    Abstract: A circuit breaker includes at least one moveable contact. The moveable electrode is operably connected to a Thomson coil actuator that can separate and open the contacts of the circuit breaker. A sensor senses current or voltage in the circuit breaker. When a condition exists that triggers an opening action, a controller will use select a current level to apply to the Thomson coil actuator. The selected current level will vary based on the sensed current or voltage level. The controller will cause a driver to apply the selected current level to the Thomson coil actuator, and it will cause the contacts to separate and open. If the circuit breaker is a vacuum interrupter, the vacuum interrupter may employ a multi-section bellows in which each section has unique structural characteristics as compared to the other sections, so that different sections will dominate as the Thomson coil's speed of operation varies.
    Type: Grant
    Filed: June 22, 2020
    Date of Patent: May 10, 2022
    Inventors: Xin Zhou, Wangpei Li
  • Patent number: 11322321
    Abstract: A movable part of a circuit breaker for a gas-insulated switchgear is proposed. The movable part includes a puffer cylinder, a nozzle, and a main contact. An outer rib at the rear end of the nozzle is hooked to a hook rib at the front end of the hook part of the puffer cylinder. A chamber guide is provided inside the puffer cylinder so that the nozzle is immobilized. The main contact is mounted on the outer surface of the front end of the hook part. Thus, the number of components constituting the movable part of the circuit breaker is reduced, and the number of bolting points is reduced, thereby greatly reducing man-hours in an assembly work and preventing a main contact separation from occurring due to bolt loosening.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: May 3, 2022
    Inventors: Sang Woo Lee, Su Hyun Park
  • Patent number: 11309156
    Abstract: An operating attachment for arrangement on a predefinable switching device and for operating a pivotable switching device toggle of the switching device includes: a one-sided open housing positionable on the switching device; a rotatable shaft having a rotation axis; a manual operating part, the manual operating part being situated on the rotatable shaft; a switch-on projection for pivoting the switching device toggle in a first pivot direction, the switch-on projection being situated on the rotatable shaft; a switch-off projection for pivoting the switching device toggle in a second pivot direction opposite the first pivot direction, the switch-off projection being situated on the rotatable shaft; and a housing stop for contacting a stop edge of the switch-off projection, the housing stop being situated in the one-sided open housing. The switch-off projection yields resiliently such that the switch-off projection is bent for contact with the housing stop.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: April 19, 2022
    Assignee: Eaton Intelligent Power Limited
    Inventors: Bernd Spritzendorfer, Raffael Zimmel
  • Patent number: 11309106
    Abstract: The present invention provides an apparatus having a protecting element for protecting the apparatus in an emergency, wherein the protecting element is a polymer PTC element, the polymer PTC element has a polymer PTC member, and the polymer PTC member is formed from a polymer composition containing a polyvinylidene fluoride as a main component.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: April 19, 2022
    Assignee: Liffelfuse Japan G. K.
    Inventors: Arata Tanaka, Keiichiro Nomura, Satoshi Sakamoto
  • Patent number: 11300629
    Abstract: A rack BMS detects a ground fault through a circuit embedded therein, and as a master BMS is configured to disconnect all the connections between battery racks and a grid in the case in which the rack BMS detects the ground fault, no more current flows through chassis, thereby protecting the battery racks and ensuring safety of a person using the battery racks.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: April 12, 2022
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Yong Uk Kim, Dae Won Kwon
  • Patent number: 11296074
    Abstract: An electrostatic protection circuit and a manufacturing method, an array substrate and a display apparatus in field of display technologies are provided. The electrostatic protection includes a first thin film transistor, a second thin film transistor, and an electrostatic protection line; a gate and a second electrode of the first thin film transistor are connected to a signal line, and a first electrode of the first thin film transistor is connected to the electrostatic protection line; a gate and a second electrode of the second thin film transistor are connected to the electrostatic protection line, and a first electrode of the second thin film transistor is connected to the signal line; each thin film transistor is an oxide thin film transistor, a length-width ratio of a channel of each thin film transistor is greater than or equal to a length-width ratio threshold, the length-width ratio threshold being 5.
    Type: Grant
    Filed: June 19, 2019
    Date of Patent: April 5, 2022
    Inventor: Chunping Long
  • Patent number: 11295921
    Abstract: A fuse cutout cover is disclosed that allows a lineman to engage a metal hook assembly and pull ring of the cutout with a loadbreak tool. The cutout also includes a wire connector and a metal top connector that leads from the wire connector to the top of the fuse. A front opening in the cover allows easy access by a loadbreak tool over a wide range of angles. A roof of the cover extends beyond the sidewalls of the opening and covers an end of the top connector. An inner vertical wall of the cover has a bottom edge that rests on the top surface of the top connector to space the roof from the top connector to provide additional vertical clearance when positioning the loadbreak tool to engage the cutout. The wall also blocks access to the enlarged open to prevent birds from nesting in the opening.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: April 5, 2022
    Assignee: Eco Electrical Systems
    Inventor: Michael Lynch
  • Patent number: 11289256
    Abstract: A coil actuator for low and medium voltage applications including: a coil electromagnet having a single coil winding and a movable member; and a power and control unit including: a power circuit operatively coupled with the coil electromagnet, the power circuit including input terminals for receiving an input voltage and an intermediate node, the electromagnet being electrically connected with the input terminal and the intermediate node, the power circuit further including a discharge circuit, which is electrically connected with the first input terminal and the intermediate node in parallel with the coil winding, and a switch circuit, which is electrically connected with the intermediate node and the second input terminal, the switch circuit including at least a power switch; a controller operatively coupled with the power circuit to drive the at least a power switch to control of an input current circulating through the power circuit, the controller being adapted to perform a PWM control of the input curre
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: March 29, 2022
    Assignee: ABB Schweiz AG
    Inventors: Marco Testa, Roberto Usai
  • Patent number: 11287227
    Abstract: A conducted electrical weapon (“CEW”) launches electrodes to provide a stimulus signal through a target to impede locomotion of the target. After use of the CEW, the user of the CEW may forget to turn the CEW off thereby wasting energy from the power supply (e.g., battery). The CEW includes a motion detector that detects movement of the CEW, or handle of the CEW. If the CEW does not move for a period of time, it is assumed that the CEW is no longer being used, so the CEW powers itself down to conserve energy. The components of the CEW that have been powered down may have power restored responsive to detecting operation of a control (e.g., safety) of the CEW.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: March 29, 2022
    Assignee: Axon Enterprise, Inc.
    Inventor: Gerzain Mata
  • Patent number: 11272604
    Abstract: A lightning grounding apparatus that includes a pivot arm and an electrical grounding element at the distal end of the pivot arm. An actuator is mechanically coupled to the pivot arm and configured to rotate the pivot arm about an axis so as to swing the distal end of the pivot arm between a retracted position and an extended position that is configured to make physical contact between the electrical grounding element and a surface of a structure to be grounded. A limit switch is provided that is mounted on the pivot arm, and is responsive to a position of a limit switch operating arm. The limit switch operating arm is configured to trip the limit switch in response to a predetermined amount of force against the distal end of the pivot arm resulting from physical contact being made between the electrical grounding element and the surface of the structure.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: March 8, 2022
    Assignee: Delta Air Lines, inc.
    Inventor: David E. Burson
  • Patent number: 11239648
    Abstract: An arc fault detection circuit interruption (AFCI) device includes a high frequency arc noise sensor and an arc fault detection circuit for sensing a high frequency arc noise. The high frequency arc noise sensor is disposed across a hot conductor and a neutral conductor and includes a surge protection device and a surge protection circuit such that the surge protection device protects against a first voltage surge in a first range of thousands to hundreds volts and the surge protection circuit protects against a second voltage surge in a second range of hundreds to few volts. The arc fault detection circuit is coupled in series with the high frequency arc noise sensor. The arc fault detection circuit is coupled to a series combination of a trip solenoid or electromagnet and a silicone-controlled rectifier disposed across the hot conductor and the neutral conductor.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: February 1, 2022
    Inventor: Hugh T. Kinsel
  • Patent number: 11233590
    Abstract: Disclosed is a voltage detector and a communication circuit capable of detecting a low input voltage. The voltage detector includes: an alternating-current coupling circuit generating a first and a second input voltages according to a source input voltage; a feedback amplifier outputting a branch current according to a sink current including the branch current, and determining an output voltage according to the first input voltage and the amount of the branch current; and an auxiliary circuit outputting the amount of the sink current according to the second input voltage. When the sink current increases as the second input voltage rises, the branch current also increases, so that the output voltage not only rises as the first input voltage rises but also rises as the branch current increases. This feature allows a lower input voltage to be detectable by the detection of the risen output voltage.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: January 25, 2022
    Inventor: Chung-Yu Lin
  • Patent number: 11223302
    Abstract: An electrostatic chuck has a structure in which an electrostatic electrode is embedded in a disk-like ceramic plate and attracts a wafer that is placed on the ceramic plate and that has a diameter smaller than that of the ceramic plate by Johnsen-Rahbek force. The electrostatic chuck includes an insulating film that has an electric resistance larger than that of the ceramic plate in an annular region of a front surface of the ceramic plate from an outer circumferential edge of the ceramic plate to the inside of an outer circumferential edge of the wafer that is placed on the ceramic plate.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: January 11, 2022
    Assignee: NGK Insulators, Ltd.
    Inventors: Reo Watanabe, Nobuyuki Kondou, Yutaka Unno
  • Patent number: 11211783
    Abstract: A circuit includes processing circuitry is sensitive to a regulated voltage at the output node and to a temperature of the circuit. The processing circuit is configured to provide voltage and temperature sensing signals indicative of the regulated voltage at the output node and the temperature of the circuit. The processing circuitry is configured to assume i) a first state, as a result of the voltage sensing signal reaching a voltage threshold, ii) a second state, as a result of the temperature detection signal reaching a temperature threshold, or iii) a third state, as a result of both the voltage and the temperature sensing signals failing to reach the thresholds. The circuit comprises a warning output coupled to a warning signal generation network controlled by the processing circuitry.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: December 28, 2021
    Inventors: Giovanni Luca Torrisi, Salvatore Abbisso, Cristiano Meroni