With Specific Voltage Responsive Fault Sensor Patents (Class 361/88)
  • Patent number: 11005382
    Abstract: In an isolated DC-DC converter, in response to a switching transistor connected to the primary winding of a transformer turning off, a turn-on control circuit turns on a synchronous rectification transistor on the secondary side. A turn-off control circuit determines the turn-off time point of the synchronous rectification transistor by charging a capacitor with a current commensurate with the magnitude of an induced voltage appearing in the secondary wiring of the transformer during the on-period of the switching transistor and, after the synchronous rectification transistor turns on, discharging the capacitor with a current commensurate with the output voltage of the DC-DC converter.
    Type: Grant
    Filed: October 4, 2019
    Date of Patent: May 11, 2021
    Assignee: Rohm Co., Ltd.
    Inventor: Hideo Hara
  • Patent number: 10972016
    Abstract: A power conversion system including a first converter configured to convert an input voltage into a plurality of discrete voltages. A second converter configured to convert the plurality of discrete voltages into a plurality of modulated voltages. Each modulated voltage of the plurality of modulated voltages comprises two voltage levels equal, respectively, to two of the discrete voltages of the plurality of discrete voltages. A selection unit configured to alternatively output each modulated voltage of the plurality of modulated voltages across a pair of output terminals.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: April 6, 2021
    Assignee: Solaredge Technologies Ltd.
    Inventors: Meir Gazit, Menashe Walsh
  • Patent number: 10964490
    Abstract: A power contact health assessor system includes a pair of terminals adapted to be connected to a set of switchable contact electrodes of a power contact and a contact separation detector configured to determine a time of separation of the set of switchable contact electrodes during deactivation of the power contact. The system includes a controller circuit operatively coupled to the pair of terminals and the contact separation detector. The controller circuit is configured to determine within a first observation window, a plurality of contact stick durations and an average contact stick duration. One or more additional observation windows with corresponding average contact stick durations are configured. A health assessment for the set of switchable contact electrodes may be based on a subsequent contact stick duration for a contact cycle after the first observation window and the corresponding average contact stick durations for the one or more additional observation windows.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: March 30, 2021
    Assignee: Arc Suppression Technologies
    Inventors: Reinhold Henke, Robert Thorbus
  • Patent number: 10928450
    Abstract: A method for protecting a circuit is provided, wherein the circuit comprises a plurality of switch devices connected in series. The method comprises detecting a failure risk indicator of each switch device; determining whether each switch device has a failure risk based on the corresponding failure risk indicator; and making each of the switch device(s) having the failure risk in a constant on-state to eliminate the failure risk and prevent a failure of the switch device optionally if a number of the switch device(s) which have or had the failure risk is less than or equal to a preset value.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: February 23, 2021
    Assignee: General Electric Company
    Inventors: Marius Michael Mechlinski, Stefan Schroeder, Jie Shen, Fan Zhang, Zhihui Yuan
  • Patent number: 10841998
    Abstract: A system for emitting light (such as a luminaire) includes a first light emitting diode (LED) string and a first LED driver that is electrically connected in parallel to the first LED string. The system also may include a second (or more) LED string(s), each associated with an additional LED driver. One-way conductors and normally-open switches are used so that if one LED driver fails, the remaining LED driver(s) will deliver power to the failed driver's LED string so that the light remains operational, but with a reduced brightness.
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: November 17, 2020
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Benjamin David Vollmer, Isaac P. Dost, Walten Peter Owens, George Albert Dederich
  • Patent number: 10715055
    Abstract: A power semiconductor circuit comprising a field effect transistor having a drain, a source and a gate as terminals, and further comprising a control device having a drive device and an undervoltage detection circuit. The drive device drives the field effect transistor and is electrically connected to the gate of the field effect transistor. The undervoltage detection circuit generates an undervoltage detection signal if a power semiconductor voltage present between the drain and the source of the field effect transistor falls below a specific voltage value. The drive device switches on the field effect transistor when a switch-on command for switching on the field effect transistor and the undervoltage detection signal are present. The invention provides a power semiconductor circuit with low energy loss.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: July 14, 2020
    Assignee: Semikron Elektronik GmbH & Co., KG
    Inventors: Gunter Koenigsmann, Thomas Eck
  • Patent number: 10627447
    Abstract: A system and method of determining a fault in two or more series switches of an electrical system. The electrical system includes, at least one AC power source, at least one sensor, at least two series switches, and a fault analysis module including a processor and a memory. The method includes applying, by the at least one AC power source, at least one time varying signal to the electrical system. The method further includes receiving, by the fault analysis module, at least one measurement, from the at least one sensor, of the at least one time varying signal, at least one node of the electrical system. The method further includes receiving, by the fault analysis module, at least one predetermined signal parameter and determining, by the fault analysis module, the presence of a fault, based on the at least one measurement and the at least one predetermined signal parameter.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: April 21, 2020
    Assignees: TE CONNECTIVIY CORPORATION, TE CONNECTIVITY GERMANY GmbH, TE CONNECTIVITY SOLUTIONS GmbH
    Inventors: Marco Grazioli, Robert Joseph Baragona, Frank Liebusch, Raymond Howard Kohler, Ganesh Shivaram Bhatt
  • Patent number: 10386913
    Abstract: In one embodiment, a system includes a number of networking modules. Each module includes a respective voltage controller and a voltage-configuration circuit. The voltage-configuration circuit includes a number of transistors that are each coupled to a respective resistor. The system also includes one or more processors coupled to the voltage controllers including instructions executable by the processors. The processors being operable when executing the instructions to configure, for each module, an on-state or off-state of the transistors coupled to the respective resistor. The transistors coupled to the respective resistor correspond to a bit of a number of under-voltage thresholds. The processors are also operable to preset, during a module initialization, a relative ranking of under-voltage shutdown between the modules by setting the transistors. At least one of the number of networking modules has a different under-voltage threshold level relative to another one of the networking modules.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: August 20, 2019
    Assignee: Platina Systems Corporation
    Inventors: Frank Szu-Jen Yang, Jason Luo Pang
  • Patent number: 10298149
    Abstract: A power electronic converter comprises controllable switches (104-109) and a control system (110) for operating the controllable switches. The control system is configured to control the controllable switches so as to produce at least one test voltage pulse. The power electronic converter comprises a voltage sensor (111) for detecting a reflected voltage that is caused by a reflection of the test voltage pulse in an electric system connected to the power electronic converter. The control system is configured to control the operation of the power electronic converter at least partly in accordance with information based on the detection of the reflected voltage. The information can be used for example for determining forbidden voltage pulse lengths which would cause reflection-based over-voltages and/or for detecting faults such as short circuits and earth faults.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: May 21, 2019
    Assignee: Vacon Oy
    Inventors: Nicklas Sodo, Jussi Pouttu
  • Patent number: 10205199
    Abstract: Provided is a portable rechargeable power supply device such that major accidents such as from overcharging due to a hazard prevention means being damaged by rain water, or the like can be prevented from occurring. This portable rechargeable power supply device comprises a lithium-ion battery (11), an assembled circuit board (20), and a case (40). Two terminals (31a, 31b), a hazard prevention circuit unit (26), and the like, are provided on the assembled circuit board (20). A terminal housing case portion (416) of the case (40) houses a first portion of the assembled circuit board (20), which is provided with the two terminals (31a, 31b). A main body housing case portion (417) of the case (40) houses the lithium-ion battery (11), and a second portion of the assembled circuit board (20), which is provided with the hazard prevention circuit unit (26), and the like.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: February 12, 2019
    Assignee: SFT LABORATORY CO., LTD.
    Inventor: Hiroshi Ichigaya
  • Patent number: 10103643
    Abstract: A converter includes a transformer including primary windings and secondary windings, switches connected to the primary windings, an output inductor connected to the secondary windings, and a controller connected to the switches. The controller turns the switches on and off based on dwell times calculated using space vector modulation with a reference current ref whose magnitude changes with time.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: October 16, 2018
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Tao Zhao, Dewei Xu, Jahangir Afsharian, Bing Gong, Zhihua Yang
  • Patent number: 10090664
    Abstract: The present disclosure relates to detection of faults in an electric power system. In one embodiment, an incremental quantities subsystem is configured to determine a forward torque, an operating torque, and a reverse torque based on the plurality of time-domain representations of electrical conditions. Each of the forward torque, the operating torque, and the reverse torque may be integrated over an interval. A fault detection subsystem may determine an occurrence of the fault based on a comparison of the operating torque to the forward torque and the reverse torque. Further, a direction of the fault may be determined based on the comparison of the forward torque, the operating torque, and the reverse torque. A fault may be declared based on the comparison and the direction. A protective action subsystem may implement a protective action based on the declaration of the fault.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: October 2, 2018
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Edmund O. Schweitzer, III, Mangapathirao Venkata Mynam, David E. Whitehead, Bogdan Z. Kasztenny, Armando Guzman-Casillas, Veselin Skendzic
  • Patent number: 9904347
    Abstract: A field device with a microprocessor and a display and/or operating module, which can be disconnected from the field device, with the microprocessor showing an energy saving module, in which the display and/or operating module are switched off, with the waking circuit being provided, which generates a waking signal when the display and/or operating module are disconnected from the field device or connected thereto.
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: February 27, 2018
    Assignee: Vega Grieshaber KG
    Inventors: Volker Allgaier, Holger Staiger
  • Patent number: 9864008
    Abstract: Disclosed herein are various systems and methods for monitoring the health of a circuit breaker. In various embodiments, a system may receive a voltage measurement across a trip coil assembly associated with a circuit breaker. The system may further receive a current measurement through the trip coil assembly. A plurality of transition points may be identified based on at least one of the voltage measurement and the current measurement, the plurality of transition points corresponding to at least one of a mechanical characteristic and an electrical characteristic of the circuit breaker during a trip event. A predictive analysis may be performed based at least in part on the plurality of transition points. An indication of the predictive health may be displayed.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: January 9, 2018
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Saugata Swapan Biswas, Anurag K. Srivastava
  • Patent number: 9748763
    Abstract: Circuit protection devices, power distribution systems, and methods of monitoring circuit protection devices are described. In one example, a method of monitoring a circuit protection device in a zone selective interlocking (ZSI) system includes monitoring a variable associated with operation of the circuit protection device, determining, based at least in part on the monitored variable, when a likelihood of a malfunction of the circuit protection device exceeds a predetermined threshold, and preventing the circuit protection device from outputting a ZSI blocking signal when the likelihood of the malfunction of the circuit protection device exceeds the threshold.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: August 29, 2017
    Assignee: General Electric Company
    Inventors: Marcelo Esteban Valdes, Michael Constantin Von Kannewurff
  • Patent number: 9507331
    Abstract: A multimedia delivery platform includes a platform manager configured to monitor status of platform resources including content acquisition resources and a managed element, visible to the platform manager, including an externally accessible contact closure. A state of the contact closure is specified by user input provided by a platform manager user. The platform includes a shaking device configured to shake a signal acquisition device such as a dish antenna. A power relay in the platform includes a control terminal coupled to the contact closure of the managed element and output terminals configured to deliver power to the shaking machine upon activation of the power relay.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: November 29, 2016
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Todd W. Jones, Jason Gabriel Hill, Gary Alan Thompson
  • Patent number: 9390771
    Abstract: A circuit for sensing a difference in voltage on a pair of dual signal lines comprising a first signal line and a second signal line complementary to the first signal line, comprising: a pair of cross-coupled inverters arranged between the first and the second signal lines, each inverter having a pull-up transistor and a pull-down transistor, the sources of the pull-up transistors or of the pull-down transistors being respectively connected to a first and a second pull voltage signals, a decode transistor having source and drain terminals respectively coupled to one of the first and second signal lines and a gate controlled by a decoding control signal, whereby when the decode transistor is turned on by the decoding control signal, a short circuit is established between the first and the second signal lines through which current flows from one of the first and second pull voltage signals, thereby generating a disturb in between the first and the second pull voltage signals.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: July 12, 2016
    Assignee: Soitec
    Inventors: Richard Ferrant, Roland Thewes
  • Patent number: 9385620
    Abstract: A multiport AC link converter includes a resonant AC link, an input port, an output port, and a plurality of switches. A first subset of the switches is between the input port the resonant link and a second subset of the switches is between the resonant link and the output port. The switch sequencing for the input port is selected and executed independently of the switch sequencing for the output port the switch sequencings for the output port is selected and executed independently of that for the input port.
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: July 5, 2016
    Assignee: Lockheed Martin Corporation
    Inventors: David Louis Hoelscher, Em Hoang, Gregory George Romas, Jr., Brad Clinton Ortloff, Jatin Nikul Mehta, Daniel Homiak
  • Patent number: 9158316
    Abstract: A circuit arrangement includes a load current controller (10a) and a monitoring device (11a, 11b). The load current controller (10a) has its input side connected to a first reference signal connection (A6) and a load reference connection (A2), the latter being able to be coupled to an output of the current source (SQn) and being designed to provide a control signal (IB) at an output which is coupled to a control connection (A1) for controlling the current source (SQn). The control signal (IB) is determined on the basis of a comparison of a load current (IL) with a first reference signal (IL-REF, IREF, VREF). The monitoring device (11a, 11b) has its input side coupled to the output of the load current controller (10a) and to one of the inputs of the load current controller (10a). The monitoring device (11a, 11b) is designed to provide a feedback signal (RS) at an output coupled to the feedback connection (A3) on the basis of a comparison of the control signal (IB) with the load current (IL).
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: October 13, 2015
    Assignee: ams AG
    Inventor: Helmut Theiler
  • Patent number: 9157880
    Abstract: An electronic device includes a port for connecting the electronic device to other electronic devices and a moisture detector configured to detect an electrically conductive liquid in the first port. The moisture detector is configured to maintain a voltage on a first electrical contact of the port and to detect a short circuit between the first electrical contact and a second electrical contact of the port. The moisture detector determines that the electronic device has been exposed to an electrically conductive liquid if the monitor module detects the short circuit. The moisture detector may also put the electronic device into safe mode if it is exposed to an electrically conductive liquid.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: October 13, 2015
    Assignee: HZO, Inc.
    Inventors: Blake Stevens, Max Sorenson
  • Patent number: 9104167
    Abstract: A protection device includes a pair of electrodes and an output unit. In the pair of electrodes, one electrode, connected to a connection line that connects a load and a power supply that supplies voltage to the load, performs discharge toward the other electrode in response to application, to one electrode, of an abnormal voltage greater than or equal to a pre-set voltage exceeding a steady-state voltage output by the power supply in a steady state. The output unit detects discharge current that flows in the other electrode and outputs the detected discharge current as a control signal.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: August 11, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Sou Morizaki, Naohisa Fujita, Atsushi Hiroi, Katsuya Saito
  • Patent number: 9041326
    Abstract: A method for operating a brushless electric motor, the windings being energized by an inverter with the aid of six switches. A detection unit for detecting defective switches, a unit for measuring voltage at the outputs of the inverter, and a microcontroller for controlling the switch and for generating a pulse width modulated voltage supply for the windings are provided. A short-circuited switch causes a torque in the electric motor opposite the actuating direction of the electric motor. The method proposes that after detecting a short-circuited switch, the windings (U. V. W) are energized to generate a motor torque that is, on the whole, positive. An actuating period of the electric motor is divided into a plurality of sectors, wherein, in accordance with the defective switch, individual sectors are deactivated for the actuation of the windings (U, V, W), while other sectors are used to actuate the windings (V, W).
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: May 26, 2015
    Assignee: Continental Automotive GmbH
    Inventors: Christian Gunselmann, Mathias Fernengel, Nicolas Bruyant, Lionel Guichard, Michel Parette
  • Patent number: 9041404
    Abstract: When a continuous short circuit occurs between both terminals of a battery pack, fault, destruction and rupture of the battery can occur. Further, when a momentary short circuit occurs, a user may continue to use, without knowing thermal and electrical damage to the batteries, and reliability for the batteries is impaired, To overcome the problem, in a battery pack configured by connecting a plurality of storage batteries in series, at least one first storage battery is included which has a low capacity compared to second storage batteries during high-rate discharge, and the first storage battery undergoes polarity inversion during external short circuit, thereby preventing the other batteries from becoming damaged. There are also included a detector that detects voltage of the first storage battery, and a fault signal generator that generates an output fault signal when a voltage detected by the detector inverses.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: May 26, 2015
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shoji Yoshioka, Keita Hatanaka, Hidetoshi Kitanaka
  • Publication number: 20150103457
    Abstract: A solid state primary power switching network for modular equipment centers (MECs) distributing primary power throughout a vehicle. The solid state primary power switching network includes multiple primary power switch network devices (PPSNDs) of a MEC for controlling and distributing primary power to other MECs spatially distribute throughout a vehicle. In one or more configurations, the PPSNDs have a universal structure in that each includes a common power input source and a plurality of common power outputs. In one or more configurations, primary power sources to the vehicle are switched without a perceivably visible break in power.
    Type: Application
    Filed: October 11, 2013
    Publication date: April 16, 2015
    Applicant: The Boeing Company
    Inventors: Mark S. Shander, N. Evan Lurton, Thomas F. Currier, Todd B. Brouwer, Mark E. Liffring, Jon J. Dhondt, Carolyn Kerr, Robert D. Holley, Lowell W. Schaffner, Eugene Solodovnik, Terrance L. Thomas
  • Patent number: 9001480
    Abstract: A distributed energy resources control apparatus for controlling power from a distributed energy resource in a system section separable from a power system includes a detecting unit, a receiving unit, and a control unit. The detecting unit detects a fault of the power system. The receiving unit receives a signal indicating authorization for the distributed energy resource to perform independent operation as linking with the system section, when the system section is separated from the power system. The control unit controls a power converter converting power from the distributed energy resource and outputting to the system section, based on measurement results of a voltage and a frequency of the system section, when the fault is detected and the signal is received.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: April 7, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Yasuo Sato, Takafumi Ebara, Masahiro Watanabe, Tsukasa Onishi
  • Patent number: 9001483
    Abstract: The relay-welding detection circuit detects welding of relays (RYP, RYN) provided on a charging path from an external power supply (PW) to a first battery (14), and is provided with: a second battery (15) that can supply a welding-detection power supply independently of the external power supply (PW); a transistor switch (17) that is a circuit in which there is substantially zero current flowing in from the external power supply (PW) side of the relays, and that controls whether or not to supply the welding-detection power supply to the second battery (15) on the basis of the voltage at the external power supply (PW) side of the relays; and a control unit (18) that is electrically insulated from the transistor switch (17), and that to detects welding of the relays (RYP, RYN) on the basis of whether or not the transistor switch (17) has supplied the welding-detection power supply.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: April 7, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Shintaro Tazaki
  • Patent number: 8988234
    Abstract: An alarm system for alarming whenever there is a power leakage from an electronic device, includes a voltage decreasing circuit, a switch circuit and an alarm circuit. The voltage decreasing circuit receives a first voltage from a live wire output terminal and outputs a second voltage. The switch circuit outputs a control signal when the power leakage is detected. The switch circuit is electrically connected to a connection port. The connection port is electrically connected to the live wire output terminal and a neutral wire output terminal. The alarm circuit receives the control signal and alarms. If there is power leakage from the electronic device, the first voltage from the live wire input terminal flows into the ground wire input terminal via the electronic device; the switch circuit turns on and the alarm circuit is closed to alarm.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: March 24, 2015
    Assignee: Zhongshan Innocloud Intellectual Property Services Co., Ltd.
    Inventor: Ke-You Hu
  • Patent number: 8975775
    Abstract: A power distribution system comprises a power supply, a plurality of loads connected to one of the power supply and ground and a plurality of pulse generators, each pulse generator connected to each of the plurality of loads, configured to generate pulses to connect the plurality of loads to the other one of the power supply and ground at predetermined frequencies.
    Type: Grant
    Filed: January 24, 2012
    Date of Patent: March 10, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventor: John A. Dickey
  • Patent number: 8964337
    Abstract: Systems and methods for monitoring excitation of a generator based on a faulty status of a generator breaker are provided. According to one embodiment, a system may include a controller and a processor communicatively coupled to the controller. The processor may be configured to receive, from a contact associated with a generator breaker, a reported status of the generator breaker, receive operational data associated with one or more parameters of a generator associated with the generator breaker, and correlate the reported status of the generator breaker and the operational data. Based on the correlation, the processor may establish an actual status of the generator breaker, and, based on the actual status, selectively modify a mode of excitation of the generator.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: February 24, 2015
    Assignee: General Electric Company
    Inventors: Abhinandan Sharma, Shashidhar Nibhanupudi, Sridhar Nedunsezian
  • Patent number: 8958190
    Abstract: A control circuit, comprising a protection detection circuit, a protection synchronous output circuit, a protection synchronous input circuit and a protection circuit, is provided. The protection detection circuit is adapted to generate an error notice signal when detecting an error condition. The protection synchronous output circuit is coupled to the protection detection circuit for enabling a level of a protection synchronous pin to be a protection level when receiving the error notice signal. The protection synchronous input circuit is coupled to the protection synchronous pin for generating a synchronous protection signal when the level of the protection synchronous pin has been at the protection level for a predetermined time period. The protection circuit generates a protection signal to make the control circuit enter a protection mode when receiving one of the error notice signal and the synchronous protection signal.
    Type: Grant
    Filed: October 3, 2012
    Date of Patent: February 17, 2015
    Assignee: Green Solution Technology Co., Ltd.
    Inventors: Shian-Sung Shiu, Chih-Chun Sung, Xi Tu
  • Patent number: 8959377
    Abstract: A central processing unit (CPU) power controller includes a power supply unit, a CPU power controller, a detecting circuit, a temperature compensation circuit, an inductor, a thermistor, first and second switches, and first and second capacitors. The detecting circuit outputs a detected voltage of an inductor to the CPU power controller. The temperature compensation circuit outputs a detected voltage of the thermistor to the CPU power controller, to compensate for changes in the voltage of the inductor. If the detected voltage is greater than the rated voltage, the first switch is opened and the second switch is closed. The inductor discharges. If the detected voltage of the inductor is less than the rated voltage, the first switch is closed and the second switch is opened, the power supply unit charges the inductor to increase the voltage of the CPU.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: February 17, 2015
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd,., Hon Hai Precision Industry Co., Ltd.
    Inventor: Ji-Chao Li
  • Patent number: 8937796
    Abstract: Variable frequency motor drives and control techniques are presented in which filter capacitor faults are detected by measuring filter neutral node currents and/or voltages and detecting changes in a frequency component of the measured neutral condition and/or based on input current unbalance.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: January 20, 2015
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Yuan Xiao, Navid Zargari, Manish Pande, Vijay Khatri
  • Patent number: 8922964
    Abstract: A motor controller with a reverse-bias preventing mechanism includes a pre-charging unit, a protection unit, a conversion unit and a control unit. The pre-charging unit receives a power signal through a first electric-conduction path, and converts the power signal into a pre-charging signal according to a control signal. The protection unit receives the power signal through a second electric-conduction path, and determines whether to output the power signal, according to the polarity of the power signal. The conversion unit, coupled to the protection unit, receives the power signal outputted by the protection unit, and converts the power signal into a work voltage. The control unit, coupled to the conversion unit and the pre-charging unit, receives the work voltage to generate the control signal. The current of the power signal flowing through second electric-conduction path is smaller than the current flowing through first electric-conduction path.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: December 30, 2014
    Assignee: Industrial Technology Research Institute
    Inventors: Kun-Lun Chuang, Shin-Hung Chang, Tshaw-Chuang Chen
  • Publication number: 20140376134
    Abstract: In an integrated circuit device having an internal circuitry that requires voltage protection (e.g. negative voltage protection), the voltage protection is provided by a FET. In some embodiments, the source and drain of the FET are connected in series with the internal circuitry and an I/O node through which the voltage can be received (e.g. the source connected to the internal circuitry and the drain connected to the I/O node). In some embodiments, the FET is drain-extended (e.g. a drain-extended PFET).
    Type: Application
    Filed: June 19, 2013
    Publication date: December 25, 2014
    Inventors: Bradford Lawrence Hunter, Richard David Nicholson
  • Publication number: 20140321017
    Abstract: A first power line configured to receive a first voltage, a second power line configured to receive a second voltage which is lower than the first voltage, a first clamping unit configured to be connected to the first power line, a second clamping unit configured to be connected between the first clamping unit and the second power line, and a discharging unit configured to, when an abnormal voltage introduced through the first power line or the second power line is applied, discharge the abnormal voltage by coupling with the first clamping unit or the second clamping unit are included.
    Type: Application
    Filed: September 5, 2013
    Publication date: October 30, 2014
    Applicant: SK hynix Inc.
    Inventor: Jong Su KIM
  • Patent number: 8848328
    Abstract: A load driving device according to an exemplary aspect of the present invention includes: an output transistor coupled between a first power supply line and an output terminal, the output terminal being configured to be coupled with a load; a protection transistor that is provided between a gate of the output transistor and a second power supply line, and brings the output transistor into a conduction state when a polarity of a power supply coupled between the first power supply line and the second power supply line is reversed; and a back gate control circuit that controls the second power supply line and a back gate of the protection transistor to be brought into a conduction state in a standby mode when the polarity of the power supply is normal.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: September 30, 2014
    Assignee: Renesas Electronics Corporation
    Inventor: Akihiro Nakahara
  • Patent number: 8848329
    Abstract: A high-side output transistor and a low-side output transistor of an output circuit control voltages of conductors, which connect a power supply terminal and ground, and outputs a voltage signal to an output terminal through an output conductor. A voltage output circuit detects a voltage applied to the high-side output transistor based on a potential difference of a first resistor provided closer to the output terminal side. A comparator circuit outputs a signal to turn off a first switch and a second switch provided in the conductors, when the output voltage of the voltage output circuit exceeds a reference voltage Vr.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: September 30, 2014
    Assignee: Denso Corporation
    Inventors: Takamitsu Kubota, Yoshiyuki Kono, Toru Shimizu
  • Patent number: 8847439
    Abstract: Multiple-contact switches are disclosed. An example multiple-contact switch disclosed herein includes a double throw switch having a common terminal, a first throw terminal, and a second throw terminal, the common terminal being coupled to a reference; a first throw circuit coupled to the first throw terminal, the first throw circuit to output an open signal to a process control device when the common terminal is substantially in contact with one of the first throw terminal or the second throw terminal; and a second throw circuit coupled to the second throw terminal, the second throw circuit to cause the first throw circuit to output a close signal to the process control device when the common terminal is substantially in contact with the other one of the first throw terminal or the second throw contact terminal, wherein at least one of the open signal or the close signal corresponds to the reference.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: September 30, 2014
    Assignee: Fisher Controls International, LLC
    Inventors: Thomas Andrew Pesek, Brian Joseph Burlage, Carter Bill Cartwright, Clyde T. Eisenbeis
  • Publication number: 20140285936
    Abstract: A battery management system for a vehicle having an electrically powered motor that is powered by a plurality of battery cells includes an electrical system for providing voltage and current from the battery cells to an electrical motor. A control is operable to at least one of (a) cause fuses of the electrical system to be the weakest link in the electrical system only during a failure event, (b) disconnect the battery cells from the battery management system only during a failure event, (c) separate the driving of balancing resistors into first and second stages, with the first stage comprising cell balancing control and the second stage comprising cell balancing with reverse voltage protection and (d) provide single stage reverse voltage protection to limit or effectively eliminate an electrical conduction path through a low impedance balancing circuit.
    Type: Application
    Filed: March 11, 2014
    Publication date: September 25, 2014
    Applicant: MAGNA E-CAR SYSTEMS OF AMERICA, INC.
    Inventors: Neil R. Garbacik, Stephen L. Pudvay, John R. Collier, Qi Tao, Oscar Flores
  • Patent number: 8767364
    Abstract: When a short-circuited FET is identified as one of low-side FETs, maximum phase voltages of three phases are detected when a steering operation is performed by a driver, and the detected maximum phase voltages of the three phases are compared with one another to identify a short-circuit phase. On the other hand, when a short-circuited FET is identified as one of high-side FETs, minimum phase voltages of the three phases are detected when a steering operation is performed by the driver, and the detected minimum phase voltages of the three phases are compared with one another to identify a short-circuit phase.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: July 1, 2014
    Assignee: JTEKT Corporation
    Inventor: Shigekazu Okumura
  • Publication number: 20140168829
    Abstract: Gate drive circuits for use with semiconductor switching devices are provided. The gate drive circuits include a gate resistor of the semiconductor switching device; a resistance control module in series with the gate resistor of the semiconductor switching device, the resistance control module being configured to provide a first resistance that controls electromagnetic interference under normal operating conditions; and a second resistance during abnormal events; and an abnormal event detector coupled to the resistance control module, the abnormal event detector configured to detect an abnormal event and send an abnormal event signal to the resistance control module responsive to detection of the abnormal event. The resistance control module is configured to provide the second resistance by shorting the resistance provided by the resistance control module responsive to the abnormal event signal to provide increased gate drive and reduced switching losses during the abnormal event.
    Type: Application
    Filed: December 18, 2012
    Publication date: June 19, 2014
    Applicant: Eaton Corporation
    Inventor: Robert William Johnson, JR.
  • Patent number: 8749935
    Abstract: A protection circuit for lithium-ion battery is provided. The protection circuit samples the voltage of the lithium-ion battery as a sample voltage and outputs the sample voltage. A switch circuit includes a first switch having two first connection terminals and a first control terminal. The first switch connects the two connection terminals when the control terminal receives a high logic level and disconnects the two connection terminals when the control terminal receives a low logic level. One of the first connection terminals is connected to the lithium-ion battery through a first current-limiting resistor to receive a battery voltage and is connected to an output terminal of the switch circuit, the other first connection terminal is grounded. The output terminal outputs a logic low level as a turn-on signal and a logic high level as a turn-off signal of the lithium-ion battery.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: June 10, 2014
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventor: Huan Xia
  • Patent number: 8743521
    Abstract: A photovoltaic system having a photovoltaic generator, whose strings with series-connected photovoltaic modules have a positive pole and a negative pole, and with an inverter whose DC input is connected to the two poles. The voltage of the positive pole and/or of the negative pole is measured with respect to ground, and a first switching element located between the positive pole and the DC input of the inverter and/or a second switching element located between the negative pole and the DC input of the inverter is opened, while a third switching element located between the positive pole and the negative pole is closed, when the voltage of the positive pole or of the negative pole exceeds a predefined first or second limit value.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: June 3, 2014
    Assignee: Adensis GmbH
    Inventor: Bernhard Beck
  • Patent number: 8729444
    Abstract: A photovoltaic system comprises a plurality of photovoltaic modules which are electrically connected to a string or to multiple parallel-connected strings and form a PV generator. The first string end forms the negative pole of the photovoltaic generator, and the second string end forms the positive pole. A voltage reduction device is provided with the aid of which the potential of the negative pole is lowered to ground. Advantages with regard to the insulation class of the connecting cable used are also provided.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: May 20, 2014
    Assignee: Adensis GmbH
    Inventor: Bernhard Beck
  • Patent number: 8729739
    Abstract: A circuit breaker comprising first and second JFETs, each comprising a gate, drain and source connection, the JFETs sources being operatively connected to each other to form a common-source connection and adapted to be connected to and operating to open an external circuit when the current flowing through the JFETs exceeds a predetermined threshold, the JFETs' gates, and common-source connection being operatively connected to a gate driver circuit which causes the JFETs to turn off when the predetermined threshold is exceeded; whereupon the current flows through the common-source connection into the second gate and into the gate driver circuit which causes the gate driver circuit to turn off the first and second JFETs and open the circuit breaker. Also claimed is a method of sensing an overloaded circuit comprising leading and trailing JFETs in a circuit that open the circuit and prevent current flow when a predetermined threshold is exceeded.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: May 20, 2014
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Vadim Lubomirsky, Damian Urciuoli
  • Patent number: 8699193
    Abstract: A protection circuit that interrupts a supply of power to a driving circuit for a power conversion apparatus upon detection of an abnormality includes switches connected in series between the power supply and the driving circuit. An interruption signal enabling/disabling circuit controls the transmission of an interruption signal from the power conversion apparatus to one of the switches and turns the switch off. A monitoring circuit monitors a voltage output from the switches, and determines that the switch which is to be turned off is in a short-circuit state if the voltage is a normal value. A switch may also be determined to be in a short-circuit fault state if the interruption signal turns the switches off, and if a monitored voltage output from the switches decreases at a decay rate faster than a decay rate in a condition where the switch is not in a short-circuit state.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: April 15, 2014
    Assignee: Fuji Electric Co., Ltd.
    Inventor: Osamu Mizuno
  • Patent number: 8680843
    Abstract: Magnetic field current sensing devices, systems and methods are disclosed. In an embodiment, a current sensor includes a semiconductor die; an isolation layer disposed on the semiconductor die; at least one anchor pad disposed on the isolation layer; a current input and a current output galvanically isolated from the semiconductor die; at least one bond wire coupled to the current input and the current output, a longitudinal portion of the at least one bond wire disposed between the current input and the current output being stitched to the at least one anchor pad; and at least one sensor element arranged to sense a magnetic field induced by a current flowing in the at least one bond wire.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: March 25, 2014
    Assignee: Infineon Technologies AG
    Inventor: Udo Ausserlechner
  • Patent number: 8654502
    Abstract: An apparatus, a method, a planar insulating substrate and a chipset have been presented, comprising at least one module configured to establish a predefined pattern on a planar insulating substrate so that conductive particles can gather according to the predefined pattern. At least one another module is configured to transfer the conductive particles to the planar insulating substrate, wherein the conductive particles are arranged to gather according to the predefined pattern. A sintering module is configured to fuse the conductive particles on the planar insulating substrate, wherein the conductive particles are arranged to fuse according to the predefined pattern to establish a conductive plane on the planar insulating substrate. Embodiment of the invention relate to printable or printing electronics on a fibrous web.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: February 18, 2014
    Assignee: Stora Enso Oyj
    Inventors: Juha Maijala, Petri Sirviö
  • Publication number: 20140016237
    Abstract: A protective circuit compares at least two different signals and asserts a control node toward respective logic states accordingly. At least one of the signals is derived from a voltage on a power rail within a computer or other device. A switching element passes or isolates an enable signal based on the logic state of the control node, enabling or preventing operation of a power supply, accordingly. Central processing units (CPUs) or other elements are protected against electrically caused damage in the event that a fault is detected by the protective circuit.
    Type: Application
    Filed: July 16, 2012
    Publication date: January 16, 2014
    Inventors: Robert S. Wright, Nam Nguyen, Richard W. Clutter
  • Publication number: 20140016238
    Abstract: The relay-welding detection circuit detects welding of relays (RYP, RYN) provided on a charging path from an external power supply (PW) to a first battery (14), and is provided with: a second battery (15) that can supply a welding-detection power supply independently of the external power supply (PW); a transistor switch (17) that is a circuit in which there is substantially zero current flowing in from the external power supply (PW) side of the relays, and that controls whether or not to supply the welding-detection power supply to the second battery (15) on the basis of the voltage at the external power supply (PW) side of the relays; and a control unit (18) that is electrically insulated from the transistor switch (17), and that to detects welding of the relays (RYP, RYN) on the basis of whether or not the transistor switch (17) has supplied the welding-detection power supply.
    Type: Application
    Filed: March 28, 2012
    Publication date: January 16, 2014
    Applicant: PANASONIC CORPORATION
    Inventor: Shintaro Tazaki