With Time Delay Protective Means Patents (Class 361/94)
  • Patent number: 10553373
    Abstract: A power switching control device includes a voltage measurement unit to measure a power-source-side voltage of a circuit breaker and a load-side voltage of the circuit breaker, an inter-pole-voltage estimation unit to estimate a future inter-pole voltage from a value of the power-source-side voltage and a value of the load-side voltage, a target closing-clock-time determination unit to set a target activation point of the circuit breaker on a waveform of an absolute value of the future inter-pole voltage, set an inter-pole withstand-voltage characteristic line calculated from a rate of decrease of dielectric strength, so that the inter-pole withstand-voltage characteristic line passes through the target activation point, and determine a clock time when the inter-pole withstand-voltage characteristic line becomes zero as a target closing clock time of the circuit breaker, and a closing control unit to close the circuit breaker at the target closing clock time.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: February 4, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Tomohito Mori, Aya Yamamoto, Daisuke Yoshida
  • Patent number: 10547194
    Abstract: In a power supply control apparatus, if a switching signal input from a microcomputer to a control circuit instructs switching on of a semiconductor switch, when an input voltage that is input to the drain of the semiconductor switch is higher than or equal to a predetermined voltage, the control circuit drives a charging circuit. The charging circuit charges a capacitor (Cs) via a diode (D1). Accordingly, a voltage at the gate of the semiconductor switch taking a potential at the source of the semiconductor switch as a reference becomes higher than or equal to a predetermined voltage, and thus the semiconductor switch is switched on. While driving the charging circuit, the control circuit keeps driving the charging circuit even if the input voltage becomes lower than the predetermined voltage.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: January 28, 2020
    Assignees: AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Yuuki Sugisawa, Shunichi Sawano, Kota Oda, Keisuke Mase
  • Patent number: 10361552
    Abstract: The present disclosure relates to a solid state power controller, comprising: a power switch for interrupting a line; a current sensor for measuring a current flow on the line; and a control unit for controlling the power switch and that is configured to prevent a time-dependent overcurrent on the line on the basis of the current measured by the current sensor, wherein the control unit comprises a counter that is adapted to increment a count when the measured current is larger than a threshold value and to decrement the count when the measured current is smaller than the threshold value; and wherein the power switch is adapted to interrupt the line when the counter reaches or exceeds a predefined count.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: July 23, 2019
    Assignee: Liebherr-Elektronik GmbH
    Inventors: Rodolphe De Maglie, Erich Riedisser, Nejat Mahdavi
  • Patent number: 9991693
    Abstract: A circuit protection device having operational parameters configurable only via a separate programming device includes a memory configured to receive a selector identifying one of a plurality of operational parameters to be adjusted, and to receive a parameter value from the programming device. A processor is coupled to the memory and is configured to receive the selector from the memory, select the operational parameter of the circuit protection device based on the selector, and to receive a parameter value for the operational parameter from memory, and set the selected operational parameter to the parameter value.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: June 5, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventor: John James Dougherty
  • Patent number: 9859702
    Abstract: A method for interrupting a current of an electrical power supply line includes integrating a supply line signal of the electrical power supply line over a predetermined time period to obtain an integrated signal, determining whether the integrated signal meets a predetermined condition, and using a current interrupting element to interrupt the current if the integrated signal meets the predetermined condition.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: January 2, 2018
    Assignee: Lisa Draexlmaier GmbH
    Inventors: Michael Wortberg, Alfred Kerber, Jan Marquardt
  • Patent number: 9584045
    Abstract: The present disclosure relates to a controller, a circuit and method for controlling a power converter using pulse width modulation (PWM). At least one logic block (13, 15, 16) of the controller is configured to remove a command (4) which is configured to control the other power semiconductor switch (2) in a half-bridge (1,2) so that the other power semiconductor switch (2) remains in a non-conductive state while an antiparallel diode (6) allows an electric current (5) to pass in one direction, called the diode's forward direction, while blocking current in the opposite direction. In case the diode (6) is conducting instead of the other power semiconductor switch during the duration of the state of the command, the switching command (4) for the latter is omitted.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: February 28, 2017
    Assignee: SCHNEIDER ELECTRIC IT CORPORATION
    Inventors: Daniel Rozand, Patrick Chambon, Stefano De Cesaris
  • Patent number: 9578728
    Abstract: The present disclosure is directed to a method for detecting a failure in a signal light. In one embodiment, the method includes monitoring operation of one or more light emitting diodes (LEDs) of the signal light coupled to a constant current driver, detecting a short circuit in at least one of the one or more LEDs and signaling a failure in the signal light when the short circuit is detected.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: February 21, 2017
    Assignee: Dialight Corporation
    Inventors: Kevin A. Hebborn, Glenn J. Zingler
  • Patent number: 9400293
    Abstract: A voltage sensing circuit of a converter senses input and output voltages of a converter with only one sensing circuit. The voltage sensing circuit is capable of reducing the number of the components for a controller and the volume thereof to save cost, and detecting whether the discontinuous mode (DCM) is entered or not, thereby to apply a separate control algorithm thereto when the DCM is entered.
    Type: Grant
    Filed: October 14, 2013
    Date of Patent: July 26, 2016
    Assignee: HYUNDAI MOTOR COMPANY
    Inventors: Jung Hwan Na, Tae Hwan Chung, Sang Hoon Kwak, Hyun Wook Seong
  • Patent number: 9379537
    Abstract: A power system includes main circuit interrupters each having a load output, feeder circuit interrupters, a number of tie circuit interrupters, and a circuit. The circuit is structured to block communication, at least when at least one of the tie circuit interrupters has an open state between a first and a second of the main circuit interrupters, of a zone selective interlocking output of one of the feeder circuit interrupters having a line input electrically connected to the load output of the first main circuit interrupter to a zone selective interlocking input of the second main circuit interrupter, and of a zone selective interlocking output of a different one of the feeder circuit interrupters having a line input electrically connected to the load output of the second main circuit interrupter to a zone selective interlocking input of the first main circuit interrupter.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: June 28, 2016
    Assignee: EATON CORPORATION
    Inventor: Robert Eugene Hulse
  • Patent number: 9325054
    Abstract: A power supply circuit, an antenna control system, and a digital communication device are provided. The power supply circuit is adapted to supply electronic power to an antenna and includes a power management circuit and a pin. The power management circuit is coupled between a power input terminal and a power output terminal. In a first mode, the pin receives a mode control signal to control the power management circuit to deliver or not deliver electronic power of a power source from the power input terminal to the power output terminal. In a second mode, the pin stops receiving the mode control signal and provides a detection signal, which indicates whether the power supply circuit is overloaded. Thereby, power switching of the antenna and an overload detection/notification function are accomplished by using the single pin.
    Type: Grant
    Filed: October 9, 2012
    Date of Patent: April 26, 2016
    Assignee: Novatek Microelectronics Corp.
    Inventor: Jia-Tzung Lin
  • Patent number: 9213345
    Abstract: A protection and attenuation circuit for sensitive AC loads is described. The circuit provides AC power protection and attenuation utilizing high-efficiency switch-mode techniques to attenuate an AC power signal by incorporating a bidirectional, transistorized switch driven from a pulse width modulation signal, PWM. The circuit monitors characteristics of the AC power signal driving a known load and characteristics of the load or other elements and determines the duty cycle of the pulse width modulated signal, PWM, based upon the duration and amplitude of the over-voltage, over-current, over-limit or other event.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: December 15, 2015
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Joel Butler
  • Patent number: 9105417
    Abstract: A method of controlling the opening or the closing of an AC electric circuit in an electricity meter by means of a relay is provided. The method times relay activation commands so as to take account of the inertial delay (di) of the relay, in such a manner that the actual activation command applied to the relay causes the relay actually to take action on the electric circuit when an electrical parameter of said circuit reaches a zero value, in order to limit the formation of electric arcs in the relay.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: August 11, 2015
    Assignee: SAGECOM ENERGY & TELECOM SAS
    Inventor: Patrick Weber
  • Patent number: 9093838
    Abstract: The fault current detecting circuit includes: a current detection unit that outputs a current detection signal; a first comparing circuit unit that compares the current detection signal with a predetermined reference current value and outputs a first output signal; a differentiator that differentiates the current detection signal to output a change slope of the current detection signal; a second comparing circuit unit that compares the change slope with a predetermined reference change slope value and outputs a second output signal; a third comparing circuit unit that compares the current detection signal with a predetermined current detection limit reference value and output a third output signal; and a trip determining unit that outputs a trip control signal only when the first output signal and the second output signal are maintained to be received and the third output signal is not received.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: July 28, 2015
    Assignee: LSIS Co., Ltd.
    Inventors: Seung Hyun Bang, Hae Yong Park, Gyeong Ho Lee, Jung Wook Sim, Won Joon Choe, Min Jee Kim
  • Patent number: 9065272
    Abstract: A power supply circuit and method for supplying power are provided. The power supply circuit includes a front end circuit, a power factor correction circuit, and a drive circuit. The front end circuit is configured to generate a direct current voltage based on an input voltage. The front end circuit includes a first surge protection circuit. The power factor correction circuit is configured to generate a driving voltage based on the generated direct current voltage. The power factor correction circuit includes a second surge protection circuit and an over-temperature protection circuit. The drive circuit is configured to generate an output voltage for a load based on the driving voltage. The drive circuit includes a third surge protection circuit, a startup circuit, and an open-circuit protection circuit.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: June 23, 2015
    Assignee: OSRAM SYLVANIA Inc.
    Inventor: Victor M. Simi
  • Patent number: 9048734
    Abstract: A negative current protection system for a low side switching converter FET, for use with a switching converter arranged to operate high and low side FETs connected to an output inductor to produce an output voltage. The negative current protection system includes a current sensing circuit which produces an output Vcs that varies with the current in the high side FET, a negative current threshold generator which produces a threshold signal ?Ith which represents the maximum negative current to which the low side FET is to be subjected, and a comparison circuit arranged to compare the valley portion of Vcs and -Ith and to set a flag if Vcs<?Ith at a predetermined time in the switching cycle—typically after the converter's blanking time. When the flag is set, the system preferably responds by adjusting the operation of the switching FETs to reduce the negative current.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: June 2, 2015
    Assignee: Analog Devices Global
    Inventor: Song Qin
  • Patent number: 9042068
    Abstract: The present invention provides a protection circuit. The protection circuit includes an output stage circuit and a feedback unit that generates a first current. Under a first condition that the first current is one of currents larger than and equal to a rated current and the first condition remains for a first period, the feedback unit controls the output stage circuit to restrict the first current. Under a second condition that the first current is one of currents larger than and equal to a restriction current and the second condition remains for a second period, the feedback unit controls the output stage circuit to terminate the first current.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: May 26, 2015
    Assignee: HANERGY TECHNOLOGIES, INC.
    Inventors: Xiao-Ming Duan, Ronald Chang
  • Publication number: 20150138684
    Abstract: Disclosed is a power off device which includes a micro arc detector for turning on a first switching element, based on a voltage induced in a high frequency choke coil by a high frequency pulse current caused by micro arc at a power line, a high current arc detector for outputting a high current arc detection current during turning-on of a second switching element made based on variation of a magnetic field generated at a coil, a delay unit for accumulatively charging the micro arc detection current or the high current arc detection current in a delay capacitor at a predetermined time constant, a power off unit for electrically disconnecting a load from the power line when an operating voltage is applied, and a first switch for connecting the operating voltage to the power off unit in response to the arc detection signal.
    Type: Application
    Filed: May 24, 2013
    Publication date: May 21, 2015
    Inventors: Tae Young Chung, Dea Sang Kim
  • Patent number: 8929036
    Abstract: In one aspect, a method of electrical arc fault detection when high frequency (e.g., RF noise) is present is disclosed. The method includes determining if first arcing criterion is met, determining if delay criterion is met, implementing a delay for a delay period if the delay criterion is met, and determining if second arcing criterion is met. If the second arcing criterion is met, then a trip signal may be sent to trip the circuit breaker. In another aspect, the method includes determining if first arcing criterion is met, starting delay period if the first arcing criterion is met, determining if delay criterion is met, and if the delay criterion is met, determining if second arcing criterion is met. An arc fault detection apparatus adapted to carry out the methods, and systems including the arc fault detection apparatus are disclosed, as are various other aspects.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: January 6, 2015
    Assignee: Siemens Industry, Inc.
    Inventors: Amit Nayak, Hugh T. Kinsel
  • Patent number: 8929045
    Abstract: A delay protection circuit is installed between a power supply unit and a load of an electronic device, and includes a first capacitor and second capacitors. The delay protection circuit allows the supply of electric power to the load by the PSU, and detects power being output by the PSU. If the power output by the PSU exceeds a rated power of the load, the first capacitor becomes chargeable by the PSU, and the load is electrically disconnected from the PSU once a voltage on the first capacitor achieves a predetermined voltage level. The second capacitors are also available for charging by the PSU according to a difference between the power being output by the PSU and the rated power of the load to provide automatic adjustability of a delay time for the voltage on the first capacitor to achieve the predetermined voltage.
    Type: Grant
    Filed: July 10, 2012
    Date of Patent: January 6, 2015
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Cheng-Lung Chiang
  • Patent number: 8885311
    Abstract: A module hot swap circuit includes a low voltage-drop rectifier adapted to receive either positive or negative voltages of different absolute values. The rectifier is coupled to a power manager that provides dual startup/shutdown voltage thresholds and inrush current limiting. A detector prevents reverse current flow allowing the module to hold up during input voltage drop-outs.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: November 11, 2014
    Assignee: Apple Inc.
    Inventor: Charles E. Norman
  • Patent number: 8860428
    Abstract: An apparatus and a method for recognizing an error in a power bridge circuit containing a load, a high-side branch and a low-side branch. Accordingly, a first switched current source is connected to the load and to a diagnosis connection for a high-potential of a diagnosis voltage, a second switched current source is connected to the load and to a diagnosis connection for a low-potential of the diagnosis voltage, and a control device for controlling the first switched current source and the second switched current source. The control device switches on one of the switched current sources when the high-side power switch and the low-side power switch are open, while the other switched current source is switched off. A testing device tests a voltage at the load when one of the switched current sources is switched on and the other of the switched current sources is switched off.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: October 14, 2014
    Assignee: Continental Automotive GmbH
    Inventors: Eckart Garneyer, Christoph Haggenmiller
  • Publication number: 20140278157
    Abstract: A circuit interrupting device having an auto-monitoring circuit for periodically testing various functions and structures of the device. The auto-monitoring circuit initiates an auto-monitoring routine which, among other things, generates a self-test fault condition and determines whether the detection mechanisms within the device properly detect the self-test fault. Processing an early detection signal determines whether the self-test fault was properly detected without interfering with the normal operation of the detection circuitry and without causing a false trip within the device. Additional functionality of the auto-monitoring circuit permits automatic verification that the device is properly wired, that is, not miswired, and determines whether the device has reached the end of its useful life.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: HUBBELL INCORPORATED
    Inventor: Stephen Paul Simonin
  • Patent number: 8810986
    Abstract: An electronic circuit breaker including a two stage detection mechanism; an instantaneous trip operating at a first threshold and a delayed trip such operating at a second lower threshold. This is advantageous in maintaining operation during very short transient load peaks, which do not warrant isolation from the supply. The breaker can be line powered, can be reset remotely by controlling the line power, and can be implemented entirely in solid state electronics. As such it requires little or no service or maintenance.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: August 19, 2014
    Assignee: Qinetiq Limited
    Inventor: Timothy Rupert Charles Jarman
  • Patent number: 8760094
    Abstract: An apparatus and method for protecting a power system comprising a generator providing power to an alternating current bus, a power converter for converting alternating current power on the alternating current bus to direct current power on a direct current bus, and a direct current load powered by the direct current power on the direct current bus. An undesired condition is identified at the input to the power converter from the alternating current bus. The undesired condition is caused by at least one of the power converter, the direct current bus, or the load. The power converter is disconnected from the alternating current bus in response to identifying the undesired condition for at least a time delay. The time delay is selected such that the power converter is disconnected from the alternating current bus before the alternating current bus is disconnected from the generator due to the undesired condition.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: June 24, 2014
    Assignee: The Boeing Company
    Inventors: Eugene V. Solodovnik, Jeffrey J. White
  • Patent number: 8713332
    Abstract: A system for supplying an electrical system with direct current, the system including at least two direct current power supply devices each having means of electrical connection to an alternating current power supply source and an AC/DC converter of alternating current into direct current, a module for managing the power supply of the electrical system which, after reception of an information of failure of a first active power supply device, transmits a command to start up a second inactive power supply device and a back up electrical energy storage device electrically by-pass connected between the power supply devices and the electrical system. The management module also receives the information of failure from the back up device and/or from the electrical system and transmits the command to start up the second power supply device during a discharge phase of the back up device.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: April 29, 2014
    Assignee: Bull SAS
    Inventor: Georges Lecourtier
  • Patent number: 8710406
    Abstract: An appliance includes a plurality of electrical loads and a load control circuit including at least a clock enable circuit and a full power timer. The clock enable circuit is configured and operatively connected to activate the full power timer when all of the loads are energized, and the full power timer is configured and operatively connected to de-energize at least one load selected from the plurality of loads on reaching a predetermined full power time limit.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: April 29, 2014
    Assignee: Conair Corporation
    Inventors: Daniel Lee Sanders, Jonathan G Berera
  • Patent number: 8686596
    Abstract: A fuse box system and method providing for visual and/or remote sensing of interrupted fusing elements is disclosed. The system incorporates LEDs and/or remote sensing apparatus to permit indication of a “blown” fuse and/or circuit protection breaker. This system may be configured for both polarized and/or non-polarized applications and generally provides for indicator illumination when a fuse/breaker is blown. Some preferred embodiments may incorporate current sourcing technologies to permit operation of the system over wide range of system voltages, as well as provisions for wired and/or RF/wireless interrogation of the fuse/breaker status. Alternate embodiments including systems/methods to permit remote sensing of fuse status and/or circuit current monitoring, and may be retrofit within existing fuse/breaker panel systems in some configurations.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: April 1, 2014
    Inventors: Roy Allen Huss, Jerry Anthony Dufour, Kevin Mark Klughart
  • Publication number: 20140022685
    Abstract: A method and an arrangement for reducing an in-rush current of a multi-module system are provided. The system comprises a plurality of modules designed to perform predefined functions, and a power supply unit designed to provide power to the plurality of modules. Each of the plurality of modules comprises a power control system which performs a respective time delay on the power-on of the power received from the power supply unit. With the system and the method, the total in-rush current of the multi-module system is greatly reduced.
    Type: Application
    Filed: March 24, 2011
    Publication date: January 23, 2014
    Inventors: Feng Miao, Bin Hu, Jianbo Pan
  • Patent number: 8570700
    Abstract: There is provided a protection apparatus for a load circuit, capable of protecting the load circuit by simulating a fuse. A pseudo heat capacity Cth* smaller than a heat capacity of an electric wire used in the load circuit is set, and a temperature of the electric wire is calculated with reference to an arithmetic expression of heat generation amount of the electric wire, an arithmetic expression of heat radiation amount of the electric wire, a time counted by the count unit, and the pseudo heat capacity Cth*. Then, a semiconductor relay S1 is interrupted when the calculated temperature of the electric wire reaches an allowable temperature of the electric wire to protect the load circuit from heat generation.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: October 29, 2013
    Assignee: Yazaki Corporation
    Inventors: Akinori Maruyama, Yoshihide Nakamura, Keisuke Ueta
  • Patent number: 8521454
    Abstract: A circuit interrupter apparatus includes circuit interrupter and a device. The circuit interrupter includes separable contacts, an operating mechanism structured to open and close the separable contacts, and a trip mechanism cooperating with the operating mechanism to trip open the separable contacts. The trip mechanism includes a zone selective interlocking input and a zone selective interlocking output. The device includes a first input electrically interconnected with the zone selective interlocking input, a second input electrically interconnected with the zone selective interlocking output, and an indicator circuit structured to indicate that the zone selective interlocking input occurred at the first input or that the zone selective interlocking output occurred at the second input.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: August 27, 2013
    Assignee: Eaton Corporation
    Inventor: James L. Lagree
  • Patent number: 8464078
    Abstract: A system comprises an AC/DC adapter having a connector. The system also comprises a portable computer that receives said connector. The portable computer comprising a delay circuit coupled to a power transistor that is coupled in parallel with a resistor. The delay circuit causes the power transistor to activate following a time delay after current from the adapter begins to flow through the resistor. As a result of a user beginning to remove the connector from the portable computer, a control transistor is activated to reset the delay circuit.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: June 11, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Robert C. Brooks, Joseph A. Clegg, George F. Squibb, Robert S. Wright
  • Patent number: 8451574
    Abstract: The present invention is directed to a method and a system for fault detection analysis in a power device which is operatively associated with a differential protection unit. The power device has one input side and one output side through which an input current and an output current flows into and out from it, respectively. Signals representative of the input and output currents are processed in order to verify if an occurring fault is external to the power device. Under a condition of an external fault, the differential protection unit is disabled for a determined interval of time.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: May 28, 2013
    Assignee: ABB Technology AG
    Inventors: Ratan Das, Sethuraman Ganesan, John M. Peterson
  • Patent number: 8437112
    Abstract: A circuit breaker with a time-delay function, including a first circuit breaking unit, a remote control unit comprising a time-delay control circuit, and a housing. The first circuit breaking unit and the remote control unit are disposed in the housing, the first circuit breaking unit operates to switch on or off loads and electric lines, the remote control unit operates to control interruption of the circuit breaker with a time-delay function via a remote control signal, the time-delay control circuit operates to implement time delay after the remote control unit receives the remote control signal and before the first circuit breaking unit switches on or off the loads and the electric lines, and the housing is made of insulating and flame-retardant materials.
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: May 7, 2013
    Assignee: Hubei Shengjia Electric Apparatus Co., Ltd.
    Inventors: Jiasheng Wan, Zhiqiang Wang
  • Patent number: 8437110
    Abstract: A protection apparatus of a load circuit, comprises: a temperature estimation unit configured to estimate a temperature of an electric wire based on a pseudo-temperature arithmetic expression; and a breaking control unit configured to break a switch portion when the temperature estimated by the temperature estimation unit has reached an allowed temperature of the electric wire. The pseudo-temperature arithmetic expression is set in such a manner that, in a temperature arithmetic expression of the electric wire, the temperature arithmetic expression using the elapsed time counted by the timer, the current detected by the current detection unit, and a heat capacity and conductor resistance of the electric wire, a pseudo-heat capacity smaller than the heat capacity of the electric wire is assigned to the heat capacity, and a pseudo-conductor resistance larger than the conductor resistance of the electric wire is assigned to the conductor resistance.
    Type: Grant
    Filed: April 15, 2009
    Date of Patent: May 7, 2013
    Assignee: Yazaki Corporation
    Inventors: Yoshihide Nakamura, Akinori Maruyama, Keisuke Ueta
  • Patent number: 8436352
    Abstract: Whether there is a defect such as chipping of a die or separation of a resin in a wafer level package is electrically detected. A peripheral wiring is disposed along four peripheries of a semiconductor substrate outside a circuit region and pad electrodes P1-P8. The peripheral wiring is formed on the semiconductor substrate and is made of a metal layer that is the same layer as or an upper layer of a metal layer forming the pad electrodes P1-P8, or a polysilicon layer. A power supply electric potential Vcc is applied to a first end of the peripheral wiring, while a ground electric potential Vss is applied to a second end of the peripheral wiring through a resistor R2. A detection circuit is connected to a connecting node N1 between the peripheral wiring and the resistor R2, and is structured to generate an anomaly detection signal ERRFLG based on an electric potential at the connecting node N1.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: May 7, 2013
    Assignee: ON Semiconductor Trading, Ltd.
    Inventors: Yoshinobu Kaneda, Koji Ishida
  • Patent number: 8432657
    Abstract: A protection apparatus of a load circuit sets a threshold temperature at a lower temperature than an allowed temperature of an electric wire for use in the load circuit, and estimates a temperature of the electric wire based on an ambient temperature, a load current and a time while the load current is flowing through the electric wire. Then, in the case where the estimated temperature has reached the threshold temperature, a semiconductor relay (S1) is broken. As a result, in the case where such an electric wire temperature has risen owing to an occurrence of an overcurrent, and the like, the circuit is surely protected at the point of time before the electric wire temperature reaches the allowed temperature. Therefore, a fuse used in a conventional load circuit becomes unnecessary.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: April 30, 2013
    Assignee: Yazaki Corporation
    Inventor: Yoshihide Nakamura
  • Patent number: 8385038
    Abstract: The system of the invention includes a circuit breaker switching control section (100) and a setting control section (700) connected therewith through a communication network (500). The circuit breaker switching control section (100) transmits a circuit breaker state quantity acquired by a signal input section (120) through the communication network to a set value calculation section (740) of the setting control section (700). The set value calculation section (740) of the setting control section calculates a set value to be set in the switching control section (100) of the circuit breaker, using the state quantity of the circuit breaker that was transmitted thereto. The setting control section (700) transmits to the circuit breaker switching control section the set value calculated by the set value calculation section (730) through the communication network.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: February 26, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Minoru Saito, Hiroyuki Maehara, Osamu Hosokawa
  • Patent number: 8373373
    Abstract: An input circuit includes an interface structured to output a logic signal from an alternating current signal of a pair of elongated conductors. A load is switchable to the elongated conductors. A processor outputs a control signal to switch the load to the elongated conductors asynchronously with respect to the alternating current signal for a first predetermined time, inputs the logic signal, determines if the input logic signal is active a plurality of times during the first predetermined time and responsively sets a first state of the alternating current signal, and, otherwise, sets an opposite second state of the alternating current signal, and delays for a second predetermined time, which is longer than the first predetermined time, for the opposite second state before repeating the output, and, otherwise, delays for a third predetermined time, which is longer than the second predetermined time, for the first state before repeating the output.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: February 12, 2013
    Assignee: Eaton Corporation
    Inventors: Ronald A. Vanweelden, Mark A. Verheyen
  • Patent number: 8351171
    Abstract: A monitor control system and method for an electrical distribution system includes a trip unit of a circuit breaker. A sensor is associated with the electrical distribution system and coupled to the trip unit wherein the sensor is connected to one or more components of the electrical distribution system to detect whether the electrical distribution system is being serviced when a presence of a human being is also detected. A selector is coupled to the trip unit and configured to select maintenance mode parameters to define a mode of operation of the trip unit wherein in the maintenance mode arc flash reduction or tripping delay reduction is provided such that the trip unit operates based on the maintenance mode parameters.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: January 8, 2013
    Assignee: Siemens Industry, Inc.
    Inventor: Walter Payack
  • Patent number: 8315028
    Abstract: An overcurrent protection apparatus which, when a layer short or a dead short occurs in a load circuit, interrupts the circuit in accordance with respective situations, whereby the load circuit is protected is provided. The apparatus includes a first overcurrent detecting section for detecting a counter electromotive force generated in a power supply wiring, and a second overcurrent detecting section, disposed in each of the plural load circuits, for detecting that a load current ID becomes an overcurrent. The apparatus includes a delaying section for outputting a delay signal at a first delay time when an overcurrent is detected by the second overcurrent detecting section, and for outputting the delay signal at a second delay time which is shorter than the first delay time when an overcurrent is detected by both of the first overcurrent detecting section and the second overcurrent detecting section.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: November 20, 2012
    Assignee: Yazaki Corporation
    Inventor: Shunzou Ohshima
  • Patent number: 8284535
    Abstract: A circuit breaker capable of microcontroller-based fault detection having a backup circuit for causing the circuit to trip in response to a microcontroller fault or a failure of a regulated power supply powering the microcontroller. The circuit breaker includes an RC circuit connected to an SCR. The resistor of the RC circuit is connected between the anode and gate of the SCR, and the capacitor is connected between the gate and cathode of the SCR. The microcontroller has a first pin coupled to the RC circuit, which is initially in a high input impedance state. In the event of a microcontroller fault or power supply failure, the capacitor will charge to a voltage sufficient to activate the SCR and trip the breaker. If the microcontroller startup routine is successful, the pin is configured as an output and is pulled low, shorting out the capacitor.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: October 9, 2012
    Assignee: Schneider Electric USA, Inc.
    Inventors: Paul A. Reid, Robert Erger
  • Patent number: 8280653
    Abstract: A circuit interrupter apparatus includes circuit interrupter and a device. The circuit interrupter includes separable contacts, an operating mechanism structured to open and close the separable contacts, and a trip mechanism cooperating with the operating mechanism to trip open the separable contacts. The trip mechanism includes a zone selective interlocking input and a zone selective interlocking output. The device includes a first input electrically interconnected with the zone selective interlocking input, a second input electrically interconnected with the zone selective interlocking output, and an indicator circuit structured to indicate that the zone selective interlocking input occurred at the first input or that the zone selective interlocking output occurred at the second input.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: October 2, 2012
    Assignee: Eaton Corporation
    Inventor: James L. Lagree
  • Patent number: 8279571
    Abstract: A transmission delay line is introduced between the switch and the power output side of a power switching system so that sparking of the load is hidden from the switch by the time delay of the transmission line. This makes it possible to detect the load spark and actively protect the switch, typically by turning the switch off, before it actually knows that there has been a load fault spark. Alternatively, the delay of the transmission line is long enough so that the switch has already been turned off in normal pulse operation before the load fault current reaches the switch. Either way, the switch will be turned off under normal current flow and will not be subject to destructive over-current or over-voltage conditions.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: October 2, 2012
    Assignee: Scandinova Systems AB
    Inventors: Walter Crewson, Mark H. Kaltenborn
  • Patent number: 8270138
    Abstract: An inrush current higher than a second anomaly threshold current ILfc passes through a power MOSFET 14, when a control signal S1 of low level is applied to a gate driver 28 so that the power MOSFET 14 and the like turn to a conductive state. A first forcing shutoff operation for the power MOSFET 14 is then prevented, because a first anomaly threshold current ILoc is set to an initial level higher than the inrush current. A fuse time counter 73 starts a count-up operation in response to the occurrence of the inrush current, and continues to increment its count value until a load current IL falls below the second anomaly threshold current ILfc. According to the count value, the first anomaly threshold current ILoc is decreased stepwise with time.
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: September 18, 2012
    Assignees: Autonetworks Technologies, Limited, Sumitomo Wiring Systems, Limited, Sumitomo Electric Industries, Limited
    Inventors: Seiji Takahashi, Masayuki Kato, Masahiko Furuichi
  • Patent number: 8270135
    Abstract: A circuit for driving a transistor half bridge is disclosed that comprises a series circuit of a first and a second transistor both having intrinsic or external free-wheeling diodes coupled in parallel. The circuit for driving a transistor half bridge comprises: an over-current detection circuit that is configured to signal an over-current condition when a load current flowing through the first transistor exceeds a first threshold; a protection circuit that is coupled to the over-current detection circuit and that is configured to disable an activation of the first transistor in response to a detected over-current and to re-enable the activation of the first transistor after a first time interval has elapsed; an evaluation circuit that is coupled to the over-current detection circuit and that is configured to check whether a further over-current condition is detected within a second time interval that follows the first time interval.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: September 18, 2012
    Assignee: Infineon Technologies Austria AG
    Inventor: Steffen Thiele
  • Patent number: 8264805
    Abstract: A module hot swap circuit includes a low voltage-drop rectifier adapted to receive either positive or negative voltages of different absolute values. The rectifier is coupled to a power manager that provides dual startup/shutdown voltage thresholds and inrush current limiting. A detector prevents reverse current flow allowing the module to hold up during input voltage drop-outs.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: September 11, 2012
    Assignee: Apple Inc.
    Inventor: Charles E. Norman
  • Patent number: 8237309
    Abstract: An arrangement having DC power supply units connection parallel, wherein, the power supplies of the DC power supply units each generate a partial output current for supplying a load with a total output current. In accordance with the invention, an overload of power supply units when the power supply units are switched on and/or during their restart is largely avoided.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: August 7, 2012
    Assignee: Siemens AG
    Inventor: Arnold Klamm
  • Publication number: 20120127621
    Abstract: A circuit protection device suitable for use with a photovoltaic power generation system. The circuit protection device includes an electronic control unit and a dual path fuse. The dual path fuse has a first current path defined by a main conductor and a second current path defined by a fuse element. In response to an overcurrent condition, the control unit activates the dual path fuse to open the first current path, thereby shunting current to the second current path. Residual follow-on current flows through the fuse element via the second current path until the fuse element melts. The control unit is programmable with multiple threshold current levels and associated time delays in order to provide different activation response times that are dependent upon the detected current level.
    Type: Application
    Filed: November 23, 2010
    Publication date: May 24, 2012
    Inventors: Edward J. Knapp, JR., Kevin M. Horne
  • Patent number: 8184419
    Abstract: A power supply (200) is provided having a plurality of independent current limiting circuits. A first current limiting circuit (6) provides protection against a short circuit or other extraneous load conditions, while a second current limiting circuit, using a trace on a PCB as a sensing element, is programmable on the basis of a time constant and a current level.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: May 22, 2012
    Assignee: LHV Power, Corp
    Inventor: Chung-Hang Peng
  • Publication number: 20120075764
    Abstract: Provided is a display device which enables the automatic return of a power source circuit after the power source circuit is protected from an overcurrent, at low cost. The display device includes: an output transistor having a base to which a drive voltage signal is inputted and outputting a drive voltage from an emitter; a first transistor being turned on when an overcurrent flows into the output transistor; and a second transistor being turned on and turning off the output transistor when the first transistor is turned on, the first and second transistors are repeatedly turned on and off so as to make the output transistor intermittently operate within an overcurrent operation period, and the first and second transistors are turned off and the output transistor automatically returns to a normal operation when an operation period is shifted from the overcurrent operation period to a normal operation period.
    Type: Application
    Filed: September 23, 2011
    Publication date: March 29, 2012
    Inventors: Toshihiro Nakamoto, Satoshi Takahashi