Of Ground Fault Indication Patents (Class 324/509)
  • Patent number: 11509351
    Abstract: A method and system of determining the location of an earth fault within a loop of devices is disclosed. Upon the detection of an earth fault within the loop comprising a plurality of devices, a first device within the loop is isolated along with a second device. While the first device and the second device are isolated, it is determined if the earth fault still exists. If the earth fault no longer exists, then determine that the earth fault is located between the first device and the second device. This can be iterated through each adjacent pair of devices in the loop to localize the earth fault between the devices.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: November 22, 2022
    Assignee: CARRIER CORPORATION
    Inventors: Javier Vidal Puente, Jordi Escofet Via, Jordi Castells Moreno, Sherry Sun
  • Patent number: 11500028
    Abstract: A sensor unit includes a current sensor that detects a current, a voltage sensor that detects a voltage, a ground fault sensor that detects a ground fault, and a common substrate on which the current sensor, the voltage sensor, and the ground fault sensor are mounted. In the sensor unit, for example, in a power supply circuit of a vehicle, the three sensors of the high voltage system can be integrated on the common substrate, so that an increase in the number of parts can be suppressed.
    Type: Grant
    Filed: July 8, 2020
    Date of Patent: November 15, 2022
    Assignee: YAZAKI CORPORATION
    Inventors: Mitsuaki Morimoto, Kazuo Sugimura, Kazuya Tsubaki, Eiichiro Oishi
  • Patent number: 11467222
    Abstract: A method capable of effectively detecting an earth state and an electrical apparatus using the same are provided. The electrical apparatus includes a first detection unit for detecting whether there is power between a power supply line L and an earth line G and outputting a first detection signal, a second detection unit for detecting whether there is power between a neutral line N and the earth line G and outputting a second detection signal, and an earth state determining unit for determining an earth state according to the first detection signal and the second detection signal and determining whether a power supply is connected in a normal phase or a reversed phase.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: October 11, 2022
    Assignee: MAANSHAN CITY MINGZHU ELECTRONIC TECHNOLOGY COMPANY LIMITED
    Inventor: Itsuho Myo
  • Patent number: 11457691
    Abstract: A method, computer program product, and a system where a processor(s), in a computing environment comprised of multiple containers comprising modules, includes a processor(s) continuously obtaining pressure data from pressure sensors embedded in electrostatic dissipative (ESD) footwear. The processor(s) determines that the obtained pressure data indicates a pressure level of a pre-determined threshold and the given threshold is sustained for a pre-determined interval of time in some of the items. The processor(s) accesses one or more voltage sensors embedded in each item of the items and obtains voltage data by utilizing an ESD floor that the items are in contact with as a ground reference. The processor(s) validates functionality of some of the items and functionality of the ESD floor, based on monitoring the voltage data from the one or more voltage sensors.
    Type: Grant
    Filed: December 30, 2020
    Date of Patent: October 4, 2022
    Assignee: International Business Machines Corporation
    Inventors: Ho-Yiu Lam, John Thomas Kinnear, Jr., Sia Kai Julian Tan
  • Patent number: 11456589
    Abstract: Methods and devices for insulation monitoring of an ungrounded IT power supply system having at least two phase conductors includes determining an insulation resistance separately for each phase conductor using a separate response value. In one embodiment of the invention, relevant current and voltage distributions are calculated. In another embodiment, a change time window is set within which a second response value is activated. In yet another embodiment, an option of shutting down/continuing operation of the IT power supply system is offered.
    Type: Grant
    Filed: June 11, 2020
    Date of Patent: September 27, 2022
    Assignee: BENDER GMBH & CO. KG
    Inventors: Dieter Hackl, Oliver Schaefer
  • Patent number: 11448706
    Abstract: A system and a method for calculating insulation resistance, and more particularly for calculating insulation resistance between a positive terminal and a negative terminal of a battery and a chassis based on voltages of the battery applied to a resistor that connects the positive terminal of the battery and the chassis and a resistor that connects the negative terminal of the battery and the chassis.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: September 20, 2022
    Inventors: Jaedong Park, Hyunki Cho
  • Patent number: 11428726
    Abstract: A method for detecting faults (4) in a three-phase electrical distribution network comprising determining a zero sequence current (21 C), a first phase current (21A) and a second phase current (21 B) at a location of the three-phase electrical distribution network, determining first filtered currents (22) by removing a frequency component from the determined currents corresponding to a fundamental frequency of the electrical distribution network through filtering out said frequency component, determining directions of the first filtered currents during a first time period (23), and comparing said directions (24) relatively to each other, and, if at least one of the determined directions is opposite with respect to at least one of the other two determined directions, signaling a detection of a fault (25).
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: August 30, 2022
    Assignee: EMTELE OY
    Inventor: Seppo Pettissalo
  • Patent number: 11402436
    Abstract: A power conversion system includes a sensing circuit to sense a system voltage of a DC bus circuit with a first DC bus terminal with a first voltage positive relative to a second voltage of a second DC bus terminal. The sensing circuit includes a first capacitor having a first terminal coupled to the second DC bus terminal, and a second terminal; a second capacitor having a first terminal coupled to the second terminal of the first capacitor, and a second terminal coupled to a reference node; and a resistive divider circuit coupled across the first capacitor and having an output terminal that delivers a voltage signal corresponding to a voltage across the first capacitor.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: August 2, 2022
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Jiangang Hu, Brian P. Brown, Lixiang Wei, Andrew J. Roberts
  • Patent number: 11353491
    Abstract: An overhead power line insulator is provided including a device for detecting and measuring a leakage current and for transmitting data, the device being arranged in such a manner as to perform: measuring a leakage current of an insulator during a first measurement period and during a second measurement period in a measurement circuit; comparing two values of the current that are obtained during respective ones of the two measurement periods; and stopping the measurement circuit for a certain sleep period of time if the second value of the current is less than or equal to the first value of the current, and then starting the measurement circuit again after the certain sleep period of time.
    Type: Grant
    Filed: April 7, 2021
    Date of Patent: June 7, 2022
    Assignee: SEDIVER
    Inventors: Emmanuel Brocard, Fabrice Mesples, Philippe Carteron
  • Patent number: 11293991
    Abstract: An apparatus for measuring an insulation resistance according to the present invention includes: a first distribution resistor connected to a positive terminal of a battery and a ground; a first switch connected to the positive terminal of the battery and the first distribution resistor; a second distribution resistor connected to a negative terminal of the battery and the ground; a second switch connected to the negative terminal the battery and the second distribution resistor; and an insulation resistance measurement unit measuring a resistance value of a negative electrode insulation resistor of the battery using a first voltage applied to the first distribution resistor and measuring a resistance value of a positive electrode insulation resistor of the battery using a second voltage applied to the second distribution resistor.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: April 5, 2022
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Ho Sang Jang, Seon Yong Kim, Byoung Kyu Park, Yong Sug Choi
  • Patent number: 11296495
    Abstract: A surge protection circuit includes: a power supply unit configured to supply first power, a filter unit configured to filter noise of the first power while a current corresponding to a surge flows through the filter unit, a motor unit provided with at least one motor, a control unit configured to control the motor unit according to an operation mode, and a rectification unit provided with at least one protection capacitor and configured to rectify the filtered first power into second power. The filter unit is connected with a ground to thereby apply the current to the filter unit through the ground. A first impedance is generated by the filter unit and the rectification unit and a second impedance is generated by the control unit and the motor unit and a value of the first impedance is less than a value of the second impedance.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: April 5, 2022
    Assignee: LG Electronics Inc.
    Inventors: Soongkeun Lee, Gwigeun Park, Wonwoo Lee, Wonjae Yi
  • Patent number: 11275102
    Abstract: A method is for monitoring a ground resistance of an electric installation which consists of an ungrounded stationary alternating-voltage power supply system having at least one active conductor and of a consumer connected to the stationary alternating-voltage power supply system via a supply line. For this method, the already available active conductors of the stationary alternating-voltage power supply system and the leakage capacity of the leakage capacitor installed in the consumer are used to complete a measuring-current circuit for monitoring the ground resistance, a measuring signal being capacitively coupled between the active conductor and ground via a coupling circuit. Measuring currents and measuring voltages are measured when the consumer is switched on and off, a complex-valued load-side impedance, which has the ground resistance to be monitored in its real part, being detected from these measurements.
    Type: Grant
    Filed: February 2, 2021
    Date of Patent: March 15, 2022
    Assignee: BENDER GMBH & CO. KG
    Inventor: Eckhard Broeckmann
  • Patent number: 11275110
    Abstract: The disclosure describes techniques for detecting failures or performance degradation of a device including an integrated circuit (IC) components in the field by including additional contacts, i.e. terminals, along with functional contacts of the circuit used for connecting the circuit to a system in which the circuit is a part. These additional contacts may be internal external to the package surface and may be used to measure dynamic changing electrical characteristics over time e.g. voltage, current, capacity, temperature and impedance. These electrical characteristics may be representative of one or more failure modes and may be treated as indicator for device state-of-health (SOH).
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: March 15, 2022
    Assignee: Infineon Technologies AG
    Inventors: Klaus Elian, Rainer Markus Schaller
  • Patent number: 11262413
    Abstract: The present application provides an insulation detection circuit, a method and a battery management system. The circuit includes: a first voltage dividing module, where, one end of the first voltage dividing module is connected to a positive electrode of a power battery to be detected, and the other end of the first voltage dividing module is connected to a first isolation module and a second voltage dividing module respectively; the second voltage dividing module, connected to a negative electrode of the power battery to be detected; the first isolation module, connected to one end of a sampling module; the sampling module, where, the other end of the sampling module is connected to one end of a signal generating module; the signal generating module, where, the other end of the signal generating module is connected to power ground; and the processing module.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: March 1, 2022
    Assignee: Contemporary Amperex Technology Co., Limited
    Inventors: Meng Li, Zhimin Dan, Weiping Sun, Yizhen Hou, Wei Zhang
  • Patent number: 11255913
    Abstract: An electricity meter includes at least one phase conductor and a neutral conductor, an internal cut-off device includes at least one phase cut-off member connected in series with the phase conductor, and at least one detector circuit for acting when the internal cut-off device is open to detect whether a circuit breaker of the installation is open or closed. The electricity meter includes coupling components connected, downstream from the internal cut-off device, to an injection conductor selected from the phase conductor and the neutral conductor, and an injection component arranged to apply a reference voltage to the injection conductor via the coupling capacitor; and connection components connected to a measurement conductor selected from the phase conductor and the neutral conductor, and a measurement component arranged to measure a measurement voltage across the terminals of one of the connection components, the measurement voltage being representative of an impedance of the installation.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: February 22, 2022
    Assignee: SAGEMCOM ENERGY & TELECOM SAS
    Inventors: Henri Teboulle, Christophe Grincourt, Marc Jeanrot
  • Patent number: 11233385
    Abstract: The present disclosure relates to an earth leakage breaker and an arc detection apparatus attachable/detachable to/from the earth leakage breaker. An earth leakage breaker and an arc detection apparatus according to one embodiment of the present disclosure comprise: a body of the earth leakage breaker; and an arc detection module attachably/detachably coupled to the body of the earth leakage breaker so as to detect an arc current, wherein the arc detection module comprises: an arc detection unit connected to a first load side terminal of the body of the earth leakage breaker so as to detect an arc current flowing through a line; a control unit for determining an arc current on the basis of an arc detection signal delivered by the arc detection unit; and an output unit for outputting a signal or a current, according to a control signal of the control unit.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: January 25, 2022
    Assignee: LS ELECTRIC CO., LTD.
    Inventors: Seungjin Ham, Kihwan Oh, Jinyoung Park
  • Patent number: 11226359
    Abstract: A system and method to generate high voltage pulses for testing of electrical insulation is presented. The system is comprised of multiple bridges in series that are connected across the insulation through an output inductor. The switching of the bridges are timed to allow a resonant half-cycle of current through the output inductor and the effective capacitance of the insulation which results in a transition of the voltage across the insulation from one level to another. The sequence of switching of the bridges is swapped intermittently such that the dc links of the bridges are substantially kept balanced. In one embodiment, only the dc link of the first bridge is supplied from an external source, while the other bridges are fed via the chain of series bridges from the first bridge through the switching operation of the circuit.
    Type: Grant
    Filed: November 2, 2020
    Date of Patent: January 18, 2022
    Inventor: Ravisekhar Nadimpalli Raju
  • Patent number: 11223192
    Abstract: A leakage current protection device with automatic reset after power outage includes a switch, a power supply module, a leakage current detection module, a self-testing module, a drive control module, and a first reset module. The drive control module drives the switch based on a leakage current signal from the leakage current detection module and/or a self-test fault signal from the self-testing module. The first reset module functions to automatically set the leakage current protection device in a connected state when power resumes after an outage. Another leakage current protection device with manual reset after power outage includes similar components above and also a second reset module, which functions to automatically set the leakage current protection device in a disconnected state when power resumes after an outage; the device can then be manually reset using a reset switch. These two devices can suit different needs of different electrical appliances.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: January 11, 2022
    Inventor: Chengli Li
  • Patent number: 11181551
    Abstract: A method for operating a battery sensor and a battery sensor, including a first and second battery sensor connections, load current connection, current measurement device for recording load current, and first and second measuring resistor elements. The first and second measuring resistor element series connected between the load current connection and the second battery sensor connection, a reference current circuit with at least one reference resistor. The reference resistor in contact with the first battery sensor connection and a contact point between the measuring resistor elements.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: November 23, 2021
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Hans-Michael Graf, Martin Schramme, Andreas Aumer, Manfred Frimberger
  • Patent number: 11175330
    Abstract: The invention relates to an electric circuit arrangement and a method for coupling an insulation monitoring device to an ungrounded power supply system via a coupling impedance, which is realized to be operant for each active conductor of the power supply system and which is formed as an ohmic resistance circuit, the ohmic resistance circuit having a settable resistance value which is changeable and a switching-off function for decoupling the insulation monitoring device from the network and being realized as a bidirectional cascade comprising a series circuit of two transistors provided in a mirror-inverted manner, each having a diode connected in parallel, a controlled change in resistance of the transistors for setting the changeable resistance value being effected by a control circuit and the switching-off function for decoupling from the grid being realized by setting a maximum resistance value.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: November 16, 2021
    Assignee: Bender GmbH & Co. KG
    Inventor: Julian Reitz
  • Patent number: 11173788
    Abstract: The invention relates to a method for operating a motor vehicle (2) which has an electric high-voltage network (3) and an electric low-voltage network (4), wherein the high-voltage network (3) has at least one traction battery (5) and at least one electric drive machine (6), the low-voltage network (4) has a vehicle electrical system battery (9), and the high-voltage network (3) is monitored for an electrical short-circuit and, upon detection of a short-circuit, the traction battery (5) is disconnected from the high-voltage network (3). According to the invention, in order to check the plausibility of the detected short-circuit before the traction battery (5) is reconnected to the high-voltage network (3), a boost current (IHV) is applied to the high-voltage network (3) through the low-voltage network (4) by means of a DC/DC converter (11), and a boost voltage (UHV) measured in the high-voltage network (3) is compared with an expected boost voltage (UHV,soll).
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: November 16, 2021
    Assignee: Robert Bosch GmbH
    Inventor: Jiahang Jin
  • Patent number: 11162994
    Abstract: Line-mounted devices for determining fault magnitude in an electric power delivery system even under current-transformer (CT) saturation are disclosed herein. Fault magnitude is calculated using unsaturated regions of a current waveform captured by the line-mounted device. The method of determining the unsaturated regions is computationally efficient. Fictitious peaks are removed, and the unsaturated regions are determined based on fractions of the valid peaks. Fault current magnitude is calculated using sample values in the unsaturated regions.
    Type: Grant
    Filed: January 23, 2020
    Date of Patent: November 2, 2021
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventor: Kei Hao
  • Patent number: 11150284
    Abstract: A frequency regulation method and apparatus is applied to an insulation impedance detection apparatus in a direct current power system, and relates to the field of security monitoring technologies of a direct current electrical system. The method includes: collecting sampling voltages at a sampling point for at least three time points; determining a voltage frequency regulation manner based on the sampling voltages, obtained through sampling, at the at least three time points; and then regulating a voltage frequency of a power supply according to the determined voltage frequency regulation manner. The voltage frequency of the power supply can be regulated based on the at least three sampling voltages obtained through sampling. Therefore, the insulation impedance detection apparatus reduces insulation impedance detection duration while ensuring accuracy of measured insulation impedance.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: October 19, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Rui Yang, Zhiwei Wu, Wei Mo
  • Patent number: 11143688
    Abstract: Fault-indicator assemblies that can each be mounted externally to a corresponding electronic device to provide a visual indication that an internal fault has occurred within the electronic device. A fault-indicator assembly of the present disclosure can be configured for electrical devices such as electrical power transformers, capacitors, and reactors, among others. Some embodiments can be configured to connect to existing orifices of a conventionally manufactured electronic device, such as an orifice for a conventional pressure-relief valve. Such embodiments can be deployed without any modifications to the electrical devices and can be readily retrofitted to existing electrical devices. In some embodiments, a pressure-relief valve can be integrated with the fault-indicator assembly to provide both fault-indication functionality and pressure-relief functionality in the same assembly.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: October 12, 2021
    Assignees: Weidmann Holding AG, Orto de Mexico, S.A. de C.V.
    Inventor: Jorge Gonzalez de la Vega Rosales
  • Patent number: 11131719
    Abstract: A method monitors an electrical assembly which contains a plurality of electrical coils connected in parallel. In the method, the difference in current between the current flowing through the coils and the mean value of the currents flowing through the coils is ascertained for each of the coils connected in parallel. The differences in current are used to identify when an inter-turn short circuit occurs in one of the coils.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: September 28, 2021
    Assignee: Siemens Energy Global GmbH & Co. KG
    Inventors: Christoph Armschat, Klaus Pointner
  • Patent number: 11061076
    Abstract: An integrated circuit device includes a controller, a voltage source coupled to the controller, a voltage sampler coupled to the controller, a low current detector coupled to the controller; and memory coupled to the controller, where memory includes code segments executable by the controller for: (a) measuring a cell voltage to determine an initial voltage; (b) holding the cell voltage at the initial voltage using a power source; and (c) determining the leakage current of the cell by the current provided by the current power source with a low current detector. The power source can be one or both of a voltage source and a current source.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: July 13, 2021
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Rainer Fasching, Georgy Zerkalov, Tina Alikahi, Jason Wortham, Hushnak Singh
  • Patent number: 11057974
    Abstract: A power supply device includes: an input unit; a power supply unit that generates a supply voltage from a voltage input through the input unit (10); an output unit; an LED that generates a first output in response to input of a voltage to input terminal, the LED being disposed between the input terminal—and the fuse; an LED that generates a second output in response to input of a voltage to the power supply unit through the fuse, the LED being disposed between the fuse and the power supply unit; and an LED that generates a third output in response to output from power supply unit, the LED being connected to an output terminal.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: July 6, 2021
    Assignee: OMRON Corporation
    Inventors: Masaaki Nagano, Koji Takatori, Yasutsugu Namura
  • Patent number: 11047923
    Abstract: A ground fault detection device that is connected to an ungrounded battery, estimates an insulation resistance of the system provided with the battery, and detects a ground fault, includes a capacitor that operates as a flying capacitor, two C-contact switches that switch a V0 charging path including the battery and the capacitor, a Vcn charging path including the battery, a negative-side insulation resistance that is an insulation resistance between a negative side of the battery and ground, and the capacitor, a Vcp charging path including the battery, a positive-side insulation resistance insulation resistance that is an insulation resistance between a positive-side insulation resistance of the battery and ground, and the capacitor, and a measurement path that serves both a charge voltage measurement and a discharge of the first capacitor, and an optical MOS-FET capable of blocking charge inflow to and charge outflow from the capacitor.
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: June 29, 2021
    Assignee: YAZAKI CORPORATION
    Inventor: Yoshihiro Kawamura
  • Patent number: 11042460
    Abstract: An example meter to monitor a media device disclosed herein includes a circuit having (i) a circuit input to electrically couple with a reference capacitor and an input power line of the meter that is to electrically couple with an output power line of the media device, and (ii) a circuit output to provide a first value based on the reference capacitor when the input power line of the meter is not electrically coupled with the output power line of the media device, and a second value when the input power line of the meter is electrically coupled with the output power line of the media device. The disclosed example meter also includes a processor to determine whether the input power line of the meter is electrically coupled with the output power line of the media device based on whether the circuit output provides second value.
    Type: Grant
    Filed: August 19, 2019
    Date of Patent: June 22, 2021
    Assignee: The Nielsen Company (US), LLC
    Inventor: Andrej Barbis
  • Patent number: 11029366
    Abstract: Methods and apparatus for an IC package having an impedance detector module configured to have: a first connection to a first external energy source via a first IO pin of the IC package and a second connection to a detection component. In embodiments, the detection component is configured for connection to a first ground for the first external energy source via a second IO pin of the IC package, and to a barrier component, which is configured for connection to a second ground for a second external energy source via a third IO pin of the IC package. The impedance detector module is configured to detect a disconnection or degradation of a connection to ground.
    Type: Grant
    Filed: August 13, 2019
    Date of Patent: June 8, 2021
    Assignee: Allegro MicroSystems, LLC
    Inventor: Robert A. Briano
  • Patent number: 11018495
    Abstract: A control device for an electric power conversion apparatus, the control device detecting occurrence of an earth fault in a direct-current path in a system in which the direct-current path between a solar cell module and an electric power conversion apparatus is grounded, is provided. The control device for the electric power conversion apparatus includes: a grounding control unit configured to, in a system in which a direct-current path between a solar cell module and an electric power conversion apparatus is grounded via a switch, control a switch; and an earth fault determination unit configured to, when the switch is open under the controlled of the grounding control unit, detect whether or not an earth fault has occurred in the direct-current path.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: May 25, 2021
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Yoshihiro Tawada, Ruben Alexis Inzunza Figueroa, Tatsuaki Ambo, Masahiro Kinoshita
  • Patent number: 10998853
    Abstract: Methods, systems, and computer program products are provided herein in connection with IoT-enabled solar PV health monitoring and advising related thereto.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: May 4, 2021
    Assignee: International Business Machines Corporation
    Inventors: Amar P. Azad, Manikandan Padmanaban, Kalyan Dasgupta, Shivkumar Kalyanaraman, Jagabondhu Hazra
  • Patent number: 10985553
    Abstract: A method and apparatus for detecting battery leakage. The method includes determining whether an insulation resistance value difference is smaller than a preset reference difference when a representative insulation resistance value is larger than a preset reference resistance value, wherein the insulation resistance value difference is a difference between a previous representative insulation resistance value and the representative insulation resistance value, allocating a first value to a diagnosis flag when the insulation resistance value difference is smaller than the reference difference, allocating a second value to the diagnosis flag when the insulation resistance value difference is equal to or larger than the reference difference, and activating a count indicator when the second value is allocated to the diagnosis flag. The first value indicates that the representative insulation resistance value is valid. The second value indicates that the representative insulation resistance value is invalid.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: April 20, 2021
    Inventor: Hyeon-Ju Shin
  • Patent number: 10967744
    Abstract: A dump truck is provided with a ground fault detection device that detects a ground fault detection voltage V0 as a difference between a detection voltage Vp between a positive electrode line of a DC bus and a neutral point N and a detection voltage Vn between the neutral point N and a negative electrode line of the DC bus and detects a ground fault based upon the ground fault detection voltage V0. The ground fault detection device includes a DC component determining section that extracts a DC component VLdc from the ground fault detection voltage V0 and determines a ground fault based upon the DC component VLdc, and a drive frequency component determining sections (that extract drive frequency components VLiR, VLiL of the inverters from the ground fault detection voltage V0 and determine a ground fault based upon the drive frequency components VLiR, VLiL.
    Type: Grant
    Filed: November 23, 2017
    Date of Patent: April 6, 2021
    Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventor: Toshihiko Ishida
  • Patent number: 10965247
    Abstract: An apparatus for facilitating a measurement of characteristics of a photovoltaic cell. The apparatus includes an input port for coupling to a photovoltaic cell and an output port for coupling to a measurement equipment. The apparatus is configured to couple a first resistor across positive and negative inputs of the input port and a second resistor between the negative input and ground when the input port is not selected or inactive, and decouple the first and second resistors from the input port when the input port is selected and active. The apparatus couples the positive input of the input port to the output port when the input port is selected but inactive or selected and active. The resistors protect the photovoltaic cell from adverse consequences due to incident ambient light. Examples of multiple port versions of the apparatus are also disclosed.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: March 30, 2021
    Assignee: NEWPORT CORPORATION
    Inventors: Greggory W. Switzer, Eric H. Shelton
  • Patent number: 10962583
    Abstract: A high-voltage system including a high-voltage battery and a DC/DC converter, the high-voltage system having two different galvanically connected voltage levels with enabled DC/DC converters. A first measuring device detects the voltage of the high-voltage battery and a second measuring device detects the voltage at the output of the DC/DC converter. An insulation resistance measuring device may be configured to carry out insulation resistance measurements only when the DC/DC converter is disabled. A third measuring device may detect a voltage between a positive high voltage line and the ground and a fourth measuring device and a voltage between a negative high-voltage line and the ground. An insulation monitoring device may monitor the insulation resistances from data of the first to fourth measuring device at least when the DC/DC converter is enabled.
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: March 30, 2021
    Assignee: Volkswagen Aktiengesellschaft
    Inventors: Marcus Lehnhardt, Fabian Albrecht, Kay-Michael Günther, Marcus Sommerfeld
  • Patent number: 10937611
    Abstract: A safety switch device configured to perform at least one of connecting a load to a power supply and disconnecting the load from the power supply is provided. The safety switch device comprises a first set of two serially connected controllable switching elements; a safety circuit to verify a switching state of the first set of two switching elements, wherein each switching element of the first set of two switching elements is configured as a toggle; a control circuit configured to provide a test signal to the safety circuit; and decoupling means configured to galvanically decouple the load circuit from the control circuit. The decoupling means comprise a transformer, and the control circuit comprises a transformer driver configured to provide the test signal to the safety circuit via the transformer.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: March 2, 2021
    Inventors: Rudolf Papenbreer, Stefan Klein
  • Patent number: 10910831
    Abstract: A monitoring system is described, to monitor the condition of an industrial wiring system provided with a multipolar electric cable with a number of electric conductors having a power and/or data transmission function and enclosed inside a protective sheath, wherein: monitoring conductors, to monitor wear of the electric cable, are arranged inside the protective sheath electrically insulated from the electric conductors; and a monitoring device is operatively coupled to the monitoring conductors so as to detect at least one electric parameter associated with the monitoring conductors to detect the wear of the electric cable and generate corresponding monitoring data. The monitoring device obtains its own power supply from, and/or transmits the monitoring data by means of, the electric conductors of the same electric cable.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: February 2, 2021
    Inventors: Roberto Gariboldi, Davide Bentivoglio
  • Patent number: 10895601
    Abstract: In accordance with an embodiment, a method includes using a monitoring circuit disposed on a monolithic integrated circuit to monitor an output signal of a first switching transistor for a first output edge transition at a monitoring terminal of the monolithic integrated circuit; using a time measuring circuit disposed on the monolithic integrated circuit to measure a first time delay between a first input edge transition of a first drive signal and the first output edge transition, where the first drive signal is configured to cause a change of state of the first switching transistor; using an analysis circuit disposed on the monolithic integrated circuit to compare the measured first time delay with a first predetermined threshold to form a first comparison result; and indicating a first error condition based on the first comparison result.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: January 19, 2021
    Assignee: INFINEON TECHNOLOGIES AG
    Inventors: Matthias Bogus, Jens Barrenscheen, Christian Heiling, Benno Koeppl, Markus Zannoth
  • Patent number: 10868422
    Abstract: A detection and location-based active protection method for flexible DC distribution systems with multi-terminal distributed photovoltaic sources is disclosed. The disclosed protection method actively utilizes the coordinated control between local protection and the converters in the DC distribution system. The converter can then be modified to become an injection source with characteristic signal, providing a known fault signal to build a clear protection boundary. The disclosed protection method can distinguish the correct faulted area by calculating the harmonic impedance of the characteristic signals. Compared with existing DC protection techniques, this disclosed method does not require additional injection equipment and modification of the DC distribution system configuration, nor does it need high data sampling frequency. The disclosed technique is also unaffected by measuring noise and cable-distributed capacitance.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: December 15, 2020
    Assignee: North China Electric Power University
    Inventors: Ke Jia, Tianshu Bi, Congbo Wang
  • Patent number: 10852334
    Abstract: Embodiments of the present invention disclose methods and systems in a vehicle having high voltage (HV) for measuring isolation impedance in an EV or HEV utilizing an AC impedance measurement system. The method utilizes an extraction algorithm based on a Fourier transform to calculate phase and amplitude and then utilizes the calculated phase and amplitude to determine the isolation impedance. The isolation impedance comprises leakage resistance and total capacitance that are coupled in parallel between the high voltage system and the chassis. Embodiments of the present invention also provide a method and systems for component value self-calibration.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: December 1, 2020
    Assignee: MAXIM INTEGRATED PRODUCTS, INC.
    Inventors: Jiangang Liu, Jason Allen Wortham
  • Patent number: 10845429
    Abstract: Provided is an electronic control device capable of performing abnormality diagnosis of a digital input circuit without modifying the circuit configuration.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: November 24, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Masaki Aoyagi, Takao Fukuda, Atsushi Okonogi
  • Patent number: 10790658
    Abstract: An electronic circuit breaker may include a monitoring circuit configured to monitor and respond to a power supply and/or detection circuit failure within the electronic circuit breaker. In some embodiments, the monitoring circuit may monitor a DC current received from a detection circuit within the electronic circuit breaker. A response to a power supply and/or detection circuit failure may include interrupting current flow between an electrical power source and an electrical circuit protected by the electronic circuit breaker. Methods of monitoring and responding to a power supply and/or detection circuit failure within an electronic circuit breaker are also provided, as are other aspects.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: September 29, 2020
    Assignee: SIEMENS INDUSTRY, INC.
    Inventors: Hugh T. Kinsel, Joselito Endozo
  • Patent number: 10778135
    Abstract: An electric motor control system, including an electric motor having a first winding set including first and second parallel windings, the first and second windings operable to each current based on the combined phase current, and a differential current sensor operably coupled to the first winding and the second winding. The differential current sensor measuring a differential current flowing through the first winding and the second winding and operable to transmit a signal indicative of the differential current based on the measuring. The system also includes a motor controller connected to the electric motor, the motor controller operable to direct the combined phase current through the phase lead, receive the differential current signal, determine if the differential current flowing through the winding set exceeds a selected threshold, and identify a health status of the motor winding set as degraded if the differential current exceeds the selected threshold.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: September 15, 2020
    Assignee: HAMILTON SUNSTRAND CORPORATION
    Inventors: Andreas C. Koenig, Joseph Kenneth Coldwate, Michael J. Menke, Gary L. Miles
  • Patent number: 10775441
    Abstract: An insulation detection circuit, detection method, and battery management system are disclosed in the present disclosure. The insulation detection circuit includes a positive sampling unit, a negative sampling unit, a positive sampling point, a negative sampling point, a reference voltage terminal, and a processor. A first end of the positive sampling unit is connected with positive electrode of the power battery pack to be measured. A second end of the positive sampling unit is connected with the reference voltage terminal and the positive sampling point. A first end of the negative sampling unit is connected with negative electrode of the power battery pack to be measured. A second end of the negative sampling unit is connected with the reference voltage terminal and the negative sampling point. The processor is connected with the positive sampling point and the negative sampling point.
    Type: Grant
    Filed: August 26, 2018
    Date of Patent: September 15, 2020
    Assignee: Contemporary Amperex Technology Co., Limited
    Inventors: Zhimin Dan, Zhanyu Sun, Yizhen Hou, Jiechao Luo, Wei Zhang
  • Patent number: 10778005
    Abstract: A photovoltaic power plant (25, 32, 33, 34, 35) comprising one or more photovoltaic devices (27), each device comprising at least two terminals (30, 31) wherein one or more of the terminals (30, 31) is connected to a switch (12, 13) which is in turn connected to a point (10, 15, 16) held at a voltage relative to ground (11) and at least one switch (12, 13) is controlled in response to one or more parameters, and a method of controlling such a power plant (25, 32, 33, 34, 35).
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: September 15, 2020
    Assignee: SMA SOLAR TECHNOLOGY AG
    Inventors: Uffe Borup, Frerk Haase
  • Patent number: 10746807
    Abstract: Embodiments herein are directed to systems and methods for single wire precision measurement of a ground termination circuit. In some embodiments, a ground check monitoring apparatus includes a voltage source connected to a single insulated ground check wire, a pilot conductor, and a ground conductor, wherein the pilot conductor has a first resistance, and the ground conductor has a second resistance. The apparatus further includes a termination device connected between the pilot conductor and the ground conductor, and a ground conductor terminal connectable to a cable pilot wire. The apparatus may further include a ground terminal connectable with a cable ground wire, wherein voltage and current measured at the ground check terminal and the ground terminal are used to determine a ground check resistance.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: August 18, 2020
    Assignee: Littelfuse, Inc.
    Inventors: Daryl Warkentin, George Fenty, Kim Haluik
  • Patent number: 10692190
    Abstract: An image processing apparatus includes a memory device and at least one processor to calculate, in a pixel block including a pixel of interest and a plurality of surrounding pixels, an absolute value of a difference in pixel value between the pixel of interest and a surrounding pixel, the calculating being performed for each of the surrounding pixels, to convert a pixel value of the surrounding pixel in accordance with the calculated absolute value, the converting being performed for each of the plurality of surrounding pixels, and to perform smoothing processing for the pixel of interest by using the plurality of surrounding pixels including the surrounding pixel whose pixel value is converted. The converting performs a combination of a pixel value of the pixel of interest and the pixel value of the surrounding pixel, so that as the calculated absolute value increases, a weight of the pixel of interest increases.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: June 23, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hirokazu Tamura
  • Patent number: 10669964
    Abstract: A fuel injection valve drive control device includes a boost circuit having a boost coil, a switching component (FFT or the like) supplying a switching current from a battery source voltage to the boost coil, and a boost capacitor accumulating a boosted voltage generated by the operation of the switching component; a discharge circuit for discharging the accumulated electric charge via a current limiter (e.g. discharge resistor, constant current source) and a discharge switch (FET or the like); and a monitoring circuit for monitoring the accumulated voltage. The discharge circuit is caused to operate when the control device is shutting down and performs a deterioration/failure diagnosis of the boost capacitor and an operation check of the discharge circuit on the basis of a monitored voltage value of the boost capacitor at starting the discharge operation and a monitored voltage value of the boost capacitor after a predetermined time has elapsed.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: June 2, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventor: Yasuhiko Nagata
  • Patent number: 10611243
    Abstract: A ground fault detection apparatus includes a control unit measuring fully charged voltage of a capacitor, a first switch and a first resistor connecting a positive electrode side of a battery to a positive-electrode-side end of the capacitor, a second switch and a second resistor connecting a negative electrode side of the battery to a negative-electrode-side end of the capacitor, a third switch connecting the positive-electrode-side end to ground, a fourth switch connecting the negative-electrode-side end ground, a positive-electrode-side termination resistor connecting the positive electrode side of the battery to the ground, and a negative-electrode-side termination resistor connecting the negative electrode side to ground. The control unit compares charge voltage of the capacitor measured while the first and fourth switches are turned on with charge voltage of the capacitor measured while the second and third switches are turned on.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: April 7, 2020
    Assignee: YAZAKI CORPORATION
    Inventor: Yoshihiro Kawamura