Reverse Energy Responsive (e.g., Directional) Patents (Class 361/84)
  • Patent number: 10408401
    Abstract: An intelligent electronic candle, includes a cylindrical and hollow casing. Inside the casing, a circulation pump, a header tank are provided. The circulating water pump is arranged below the header tank, where a number of overflow ports are available on the top thereof. The outlet tube of the pump is connected above the circulating pump, and an outlet port is set up on the top of the pump outlet tube. The outlet is connecting with the header tank. An LED lamp is set up at the outer side of the pump outlet tube including a power supply with a charging port. The LED lamp is electrically connected with a power supply by wiring. A control circuit board is provided inside the casing at the bottom. The control circuit board is provided with a microprocessor, time module, radio communication module and voice control switch.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: September 10, 2019
    Assignee: Nantong Yatai Wax Artware Co., Ltd.
    Inventor: Yingqi Ding
  • Patent number: 9991777
    Abstract: A method of generating pulse width modulated (PWM) signals includes receiving a coarse signal correlated to the widths of pulses to be generated in the PWM signal. Trigger signals are generated and a one-shot device is triggered in response to the trigger signals. The one-shot device generates pulses having widths correlated to the coarse signal. A control signal correlated to the widths of the pulse to be generated in the PWM signal is received and the widths of the pulses generated by the one-shot device are adjusted in response to the control signal.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: June 5, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Brian Thomas Lynch, Stefan Wlodzimierz Wiktor
  • Patent number: 9991736
    Abstract: An apparatus for operating an external manual battery charger having a first AC power input and a DC charging output. The apparatus includes an AC controller configured to adjust at least one power parameter supplied to the AC power input of the external manual battery charger. The power parameter(s) may be any one or more of AC current, AC voltage and AC power. The apparatus further includes a feedback converter configured to monitor at least one charging parameter and to control the AC controller to adjust the one or more power parameters in accordance with the monitored charging parameter or parameters.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: June 5, 2018
    Assignee: Associated Equipment Corporation
    Inventor: Stephen David Keuss
  • Patent number: 9690288
    Abstract: The present invention provides a motor driving device for easily and accurately detecting an abnormal status of a motor. The motor driving device (21) includes a control circuit (100) for generating a driver control signal (S10); a driving circuit (200) for generating a motor driving signal (S3) according to the driver control signal (S10); an initial position detecting circuit (300) for detecting an initial position of a motor (22); and a rotation detecting circuit (400) for detecting a rotation status of the motor (22). Before the motor (22) starts to rotate normally, the control circuit (100) repeatedly performs a serial activation processing including detecting an initial position; applying an initial torque and detecting a motor rotation, and when the repetition number reaches a threshold value “m” (for example, m=5), the motor (22) is forced stop.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: June 27, 2017
    Assignee: Rohm Co., Ltd.
    Inventors: Yuji Kunida, Takashi Yoshiya
  • Patent number: 9620958
    Abstract: An electronic cigarette battery reverse connection protection device and method for using the same, comprising: a battery, a switch circuit, an alarm circuit, a discharge control circuit and a load circuit. The battery is connected with the switch circuit, the switch circuit is connected with the discharge control circuit and the alarm circuit respectively, the discharge control circuit is connected with the load circuit. The switch circuit is configured to determine whether the battery is reversely connected according to a power signal provided by the battery; when the battery is reversely connected, the discharge control circuit is turned off, and the alarm circuit is turned on and generates an alarm signal; and when the battery is correctly connected, the discharge control circuit controls the load circuit working.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: April 11, 2017
    Assignee: HUIZHOU KIMREE TECHNOLOGY CO., LTD. SHENZHEN BRANCH
    Inventor: Qiuming Liu
  • Patent number: 9573540
    Abstract: On-vehicle electrical loads (121,122) are connected to an on-vehicle battery (101) via a series circuit including a load switching element (221,222) and a reverse current interrupting element (200a) for a load circuit, and a feeding switching element (120A) that is closed in response to closure of a power supply switch (110). The element (FET) (200a) is closed when the switch (110) is closed and a power supply voltage is applied to a load power supply terminal (Vba) connected to the element (120A), to thereby be energized in an energization direction of an internal parasitic diode thereof. The element (200a) is de-energized when the switch (110) is opened. Thus, malfunction is prevented, which occurs when the element (120A) is opened, a short-to-power flows backward via the element (200a) into the terminal (Vba) so as to feed power to another device connected to the element (200a).
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: February 21, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shozo Kanzaki, Koji Hashimoto, Kazunari Masudome, Yoshitake Nishiuma, Yusuke Matsuda, Tomohiro Kimura, Shinji Higashibata
  • Patent number: 9537378
    Abstract: An audible warning system for a generator system is provided. The generator system includes a surge suppressor and a rectifier assembly. The rectifier assembly rotates along with the rotor of the generator system, and generates airflow. The surge suppressor includes a face portion. The audible warning system includes a mounting plate and an acoustic alarm device. The mounting plate is attached to the rectifier assembly to mount the surge suppressor and the acoustic alarm device. The acoustic alarm device includes an air inlet portion in engagement with a face portion of the surge suppressor. In operation, this arrangement blocks fluid communication of the airflow into the air inlet portion, in an operational state. A failure of the surge suppressor allows the airflow to pass through the air inlet portion to generate an audible alarm for an operator.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: January 3, 2017
    Assignee: Caterpillar Inc.
    Inventor: Miroslav Halicek
  • Patent number: 9533702
    Abstract: To detect and store occurrence of a reverse connection when the reverse connection has occurred, and to restricts a power assist at the next startup of a controller. In an ECU for controlling an electric motor that applies a steering assist torque on a steering mechanism, a microcomputer transmits a drive signal to a driver that drives an inverter, which controls current of the electric motor, in accordance with the drive signal. A reverse connection storage circuit is attached in parallel with the inverter, and detects and stores the occurrence of the reverse connection when the reverse connection of the ECU and a battery has occurred, and notifies the microcomputer of the occurrence of the reverse connection at the next startup of the ECU. The microcomputer transmits a signal indicating non-permission to the driver in accordance with the notification. The driver restricts the power assist upon receiving the signal.
    Type: Grant
    Filed: December 25, 2014
    Date of Patent: January 3, 2017
    Assignee: NSK Ltd.
    Inventor: Tomohiro Miura
  • Patent number: 9438032
    Abstract: The semiconductor device includes a power chip including a switching element that switches a supply of power from a power supply to a load between an on-state and an off-state, a control chip in which is incorporated a control circuit that controls the switching element of the power chip, and a reverse connection protection circuit, provided in the control chip, that controls the switching element of the power chip into an on-state when the power supply is reverse-connected, wherein the reverse connection protection circuit has protective resistors, interposed between the control circuit and the positive electrode side of the power supply, and a control voltage formation circuit into which is input an intermediate voltage of the protective resistors and which forms a control voltage that controls the switching element of the power chip into an on-state when the power supply is reverse-connected.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: September 6, 2016
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Morio Iwamizu
  • Patent number: 9341156
    Abstract: A glow plug is provided that can be easily determined as to whether or not it is a new article. An additional circuit formed by connecting a diode, a fuse, and an adjusting resistor in series in this order is connected in parallel to a heating element of a glow plug. The diode is provided so as to have an anode located on the positive electrode side of the heating element and a cathode located on the fuse side. In the case of a unit inspection, by applying a positive voltage for test to a heating element negative electrode connecting portion, it is possible to determine whether or not the glow plug is normal without blowing the fuse before the glow plug is used in a vehicle.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: May 17, 2016
    Assignee: Bosch Corporation
    Inventors: Tomohiro Nakamura, Yutaka Tanaka, Yoshihito Fujishiro, Yasuo Toyoshima
  • Patent number: 9324530
    Abstract: A circuit for protecting an electric load against reverse polarity is provided by using a MOSFET (metal oxide semiconductor field-effect transistor), wherein: the circuit is connected on the input side to a voltage supply and on the output side to the load; the source connection of the MOSFET is connected to the voltage supply; the drain connection of the MOSFET is connected to the load; the circuit has dynamic behavior similar to a diode and at the same time low power loss; the gate of the MOSFET is connected to the collector of a first bipolar transistor; the source of the MOSFET is connected to the emitter of the first bipolar transistor; the base of the first bipolar transistor is controlled by a control current; and the control current is derived from the voltage at the drain of the MOSFET.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: April 26, 2016
    Assignee: INIT Innovative Informatikanwendungen in Transport-, Verkehrs- und Leitsystemen GmbH
    Inventor: Michael Gueltig
  • Patent number: 9232605
    Abstract: A load driving circuit comprises a converting circuit, a converting controller, a load driving modulator, and a charge spike protection circuit. The converting circuit is adapted to be coupled to an output power source and supplies a driving power source to drive a load. The converting circuit has an output capacitance coupled to an output end thereof. The converting controller controls an amount of the driving power source responsive to a current or a voltage of the load. The load driving modulator and the load, connected in series, are coupled to the output end and so the load driving modulator adjusts an electronic state of the load. The charge spike protection circuit is coupled to the output capacitance and at least one connecting node of the load and the load driving modulator to provide a unidirectional charge release path to the output capacitance.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: January 5, 2016
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Shian-Sung Shiu, Chia-Ming Chan
  • Patent number: 9153952
    Abstract: A residual-current circuit breaker includes switching contacts and at least one residual current detector configured to determine a residual current signal. The residual-current circuit breaker is configured to bring about an opening of the switching contacts upon the detection of a residual current greater than a pre-definable tripping current. A first circuit arrangement is configured to inhibit tripping of the residual-current circuit breaker when a residual current occurs that has a duration that is shorter than half a period of a grid frequency of an associated electrical grid.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: October 6, 2015
    Assignee: EATON INDUSTRIES (AUSTRIA) GMBH
    Inventor: Ronaldus Niehoff
  • Patent number: 9142951
    Abstract: Disclosed herein is a device comprising a protection circuit configured to protect against a polarity reversal of the input DC power supply voltage, the protection circuit comprising an N-channel main transistor having a source coupled to an input terminal and having a drain coupled to an output terminal, a command circuit configured to render the main transistor blocked in the event of a polarity reversal and conducting otherwise, and a control circuit configured to dynamically adjust the bias of substrate regions of respective components connected to the main transistor by connecting the substrate regions either to the source or to the drain of the main transistor according to the value of the voltages present at the source and the drain of the main transistor and the type of conductivity of the substrate regions.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: September 22, 2015
    Assignee: STMicroelectronics (Rousset) SAS
    Inventor: Antoine Pavlin
  • Patent number: 9124097
    Abstract: Embodiments disclosed herein relate generally to a device for correcting the polarity of electricity in a circuit. In direct current circuits, a positive voltage received from a power source will exit the device at a predetermined output regardless of which input of the device received the positive voltage. In alternating current circuits, one or more currents received from a hot output(s) of a power source will be connected to a predetermined output(s) of the device regardless of which input(s) received the current(s).
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: September 1, 2015
    Assignee: International Safety and Development, Inc.
    Inventor: Paul M. Cruz
  • Patent number: 9105765
    Abstract: A method and apparatus for a smart junction box including: a first set of switches connected across input terminals adapted for connection to output terminals of a plurality of photovoltaic (PV) modules, a plurality of diodes connected across input terminals of each respective switch in the first set of switches, at least one reverse current detection device on at least one output terminal of the smart junction box, a second set of switches to selectively disconnect and short circuit output terminals of the smart junction box when a reverse current is detected, and wherein at least one switch of the second set of switches is located across the output terminals, a controller for controlling the first and second set of switches.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: August 11, 2015
    Assignee: Enphase Energy, Inc.
    Inventor: Martin Fornage
  • Patent number: 9088158
    Abstract: One embodiment includes a power system. The system includes a power switch device that is activated to provide an output voltage to a load in response to an input voltage. The power switch device includes a control terminal and a bulk connection. The system also includes a reverse voltage control circuit configured to passively couple the input voltage to one of the control terminal and the bulk connection in response to a reverse voltage condition in which an amplitude of the input voltage becomes negative. The system further includes an output shutoff circuit configured to passively couple the output voltage to a neutral-voltage rail during the reverse voltage condition.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: July 21, 2015
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Kenneth J. Maggio, Umar Jameer Lyles, John H. Carpenter, Jr., J. Randall Cooper, Vinod Mukundagiri
  • Publication number: 20150109706
    Abstract: The semiconductor device includes a power chip including a switching element that switches a supply of power from a power supply to a load between an on-state and an off-state, a control chip in which is incorporated a control circuit that controls the switching element of the power chip, and a reverse connection protection circuit, provided in the control chip, that controls the switching element of the power chip into an on-state when the power supply is reverse-connected, wherein the reverse connection protection circuit has protective resistors, interposed between the control circuit and the positive electrode side of the power supply, and a control voltage formation circuit into which is input an intermediate voltage of the protective resistors and which forms a control voltage that controls the switching element of the power chip into an on-state when the power supply is reverse-connected.
    Type: Application
    Filed: August 27, 2014
    Publication date: April 23, 2015
    Inventor: Morio IWAMIZU
  • Publication number: 20150077891
    Abstract: A method for detecting predetermined fault conditions associated with the supply of AC electrical power to a consumer, the supply having an active conductor and a neutral conductor with the neutral conductor being connected to earth. The method comprises providing a first current detector associated with the active conductor; providing a second current detector associated with the neutral conductor; providing a voltage detector to detect voltage between the active conductor and the neutral conductor; and checking a current ratio of neutral current to active current whereby the current ratio is indicative of a predetermined fault condition. Also disclosed is a method of checking the condition of supply line active and neutral conductors in a consumer's supplied premises including determining the impedance of the active conductor and the impedance of the neutral conductor to indicate the condition of each of the active and neutral conductors.
    Type: Application
    Filed: April 23, 2014
    Publication date: March 19, 2015
    Applicant: JEMENA ASSET MANAGEMENT (6) PTY LTD
    Inventor: Karl Nathan Edwards
  • Patent number: 8953291
    Abstract: The present invention discloses a reversal connection protecting circuit. The reversal connection protecting circuit includes a power supply interface, a secondary battery, a reversal connection driving unit and a power switching unit. The reversal connection protecting circuit further includes an anti-reversal unit. And the reversal connection protecting circuit further includes a processing unit and a warning interface. According to the present invention, the inconvenience brought by substituting a fuse that is melted in a protecting circuit under the condition that the power supply of the protecting circuit is reversely connected in prior art is overcome.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: February 10, 2015
    Assignee: BYD Company Limited
    Inventors: Yaozhong Mi, Xiangjun Dai, Qingfei Zheng, Mingxing Li
  • Publication number: 20140362484
    Abstract: A load driving method includes bringing an output transistor disposed between a first power supply line and an output terminal connected to a load into a conduction state by a protection transistor provided between a gate of the output transistor and a second power supply line when a polarity of a power supply coupled between the first power supply line and the second power supply lines is reversed, and forming a conductive path between the second power supply line and a back gate of the protection transistor via a transistor by a back gate control circuit when the polarity of the power supply is normal, the back gate control circuit including the transistor, a gate of the transistor being coupled to the first power supply line directly via a connection node located in a connecting line that couples the first power supply line and the output transistor, the transistor being coupled between the second power supply line and the back gate of the protection transistor.
    Type: Application
    Filed: August 21, 2014
    Publication date: December 11, 2014
    Inventor: Akihiro Nakahara
  • Patent number: 8908343
    Abstract: An electric distribution system includes at least one feeder and a protection and control system. The feeder includes at least one segment including a first end and an opposing second end. The protection and control system includes a protective device and an electric current measuring device coupled to the segment proximate each end. The system further includes at least one processor coupled in communication with the electric current measuring devices. The at least one processor is programmed to determine a difference between a synchronized first electric current measured proximate the first end and a synchronized second electric current measured proximate the opposing second end and determine a switching condition of the protective devices as a function of the difference between the synchronized first and second electric currents.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: December 9, 2014
    Assignee: General Electric Company
    Inventors: Yan Pan, Wei Ren, Swakshar Ray, Michael Reichard, Amol Rajaram Kolwalkar, Reigh Allen Walling
  • 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
  • Publication number: 20140268455
    Abstract: Reverse battery protection circuits for devices powered by batteries coupled in parallel can include both P-channel and N-channel MOSFETs. Each positive battery terminal connector of a battery-powered device can be coupled to a gate of an N-channel MOSFET or to both a gate of an N-channel MOSFET and a gate of a P-channel MOSFET. In some embodiments, each negative battery terminal connector of the device can be connected to a gate of a P-channel MOSFET. In the event of a reverse battery connection, one or more of the protection circuit's P-channel and N-channel MOSFETS can switch to a non-conductive state to isolate the device's load from an incorrectly installed battery and prevent the incorrectly installed battery and/or other parallel-coupled battery from prematurely discharging. Methods of protecting a load from a reverse battery connection are also provided, as are other aspects.
    Type: Application
    Filed: March 12, 2013
    Publication date: September 18, 2014
    Applicant: Bayer HealthCare LLC
    Inventor: Igor Gofman
  • Publication number: 20140268456
    Abstract: A relay device includes a relay circuit to which driving current is supplied from a battery, a driving circuit configured to drive the relay circuit, and a protecting circuit having a Schottky diode and a voltage suppressing element. The battery, the relay circuit, the driving circuit, and the protecting circuit are connected in series. The Schottky diode and the voltage suppressing element form a parallel body in which the Schottky diode and the voltage suppressing element are connected in parallel with each other with their forward directions set to the same directions.
    Type: Application
    Filed: May 30, 2014
    Publication date: September 18, 2014
    Applicant: Yazaki Corporation
    Inventors: Shinobu Mochizuki, Takuma Takeno
  • Patent number: 8830643
    Abstract: A polarity reversal protection device for motor vehicles has a detection device (10), a first connection element (22) electrically connected to a supply tap (94), a second connection device (24) having the electrical potential of the vehicle body. In case of a polarity reversal, the first connection element (22) is electrically connected to the first connection element (24) via the detector device (10). Further, the reverse polarity protection device is characterized in that a insulating layer (26) is provided between the first connection element (22) and the second connection element (24), that each of the connection elements (22, 24) has at least one receptacle (36, 38) and that the detection device (10) is at least positively engaged in at least one receptacle (36, 38).
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: September 9, 2014
    Assignee: Auto Kabel Managementgesellschaft mbH
    Inventor: Frank Gronwald
  • Patent number: 8817439
    Abstract: According to one disclosed embodiment, a power delivery circuit includes a switch for protection of a load in a reverse battery condition. The load is coupled in cascade with the protection switch, where the protection switch disconnects the load from the battery in the reverse battery condition. The protection switch does not include p-n junction diodes present in conventional protection switches using FETs. The protection switch utilizes, for example, a GaN HEMT, that does not include a p-n junction diode. Thus, the threat of internal conduction in the protection switch during a reverse battery condition is eliminated. The power delivery circuit also protects the load in a load dump condition.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: August 26, 2014
    Assignee: International Rectifier Corporation
    Inventors: Stefano Clemente, Cesare Bocchiola
  • Publication number: 20140204491
    Abstract: For example, backflow preventing means is provided, which reduces a recovery electric current occurring in the event of backflow of an electric current so as to ensure high efficiency, high reliability, etc. The backflow preventing means includes a backflow preventing element, such as a rectifying element, which is connected between an alternating-current power supply and a load and prevents the electric current from flowing backward from the load toward the alternating-current power supply; and commutating means for performing a commutation operation for causing the electric current to flow toward a different path that is connected in parallel with the backflow preventing element, whereby a conduction loss and a loss caused by the electric current can be reduced.
    Type: Application
    Filed: January 31, 2011
    Publication date: July 24, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takuya Shimomugi, Koichi Arisawa, Yosuke Shinomoto, Takashi Yamakawa
  • Publication number: 20140168837
    Abstract: The invention relates to a safety system comprising a safety unit having an output and a safety input, a bus line and at least one safety related participant. The bus line and the safety related participant form a test signal path having a forward path and a return path. The safety related participant comprises an interconnection module with a test signal input and a test signal output and a protective device integrated in the test signal path by means of the interconnection module. The protective device comprises two switches which are respectively connected to the interconnection module via a forward line and a return line of the interconnection line for the formation of a first and a second electric switching path. The interconnection module comprises a test circuit for the two switching paths with a controlled current source, a controlled current sink and a current direction element.
    Type: Application
    Filed: October 8, 2013
    Publication date: June 19, 2014
    Applicant: SICK AG
    Inventor: Stephan HENNEBERGER
  • Patent number: 8749934
    Abstract: In a photovoltaic system including a plurality of strings, each includes a plurality of photovoltaic modules exclusively connected in series, bus lines to which the strings are connected in parallel, and a converter for feeding electric energy from the bus lines into a power grid. A system voltage drop between the bus lines can be adjusted by a controller of the converter, and a current sensor is provided for each string that at least determines whether a reverse current flows to the string and reports to the controller of the converter whether a reverse current flows to the string, and the controller of the converter reduces the system voltage present between the bus lines to stop the reverse current.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: June 10, 2014
    Assignee: SMA Solar Technology AG
    Inventor: Gerd Hackenberg
  • Publication number: 20140085759
    Abstract: A power supply circuit for a voltage step-up circuit comprises a diode and a first controllable semiconductor, wherein the diode is connected in series to the first controllable semiconductor in a main current direction of the first controllable semiconductor. The diode electrically connects an output of the first controllable semiconductor to an output of the power supply circuit. A polarity reversal protection circuit for an electric load comprises an output stage, a voltage step-up circuit and a power supply circuit according to the invention.
    Type: Application
    Filed: May 7, 2012
    Publication date: March 27, 2014
    Inventor: Uwe Richter
  • Patent number: 8680708
    Abstract: In response to turning-on of a lock-type power switch, an initial controller outputs a first voltage for a first period and a gate is turned on for the period via a first driver responsive to the first voltage, then DC power is supplied to a main circuit. During the period, a control processor causes a voltage output section to start outputting a second voltage so that the gate is turned on via a second driver to continue the DC power supply. When no event has been generated for a second period, the second voltage from the voltage output section is stopped to turn off the gate, thus the power supply to the main circuit is shut off. Once a power from outside is switched from OFF to ON while the power switch kept ON, the power supply to the main circuit is resumed via the controller and first driver.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: March 25, 2014
    Assignee: Yamaha Corporation
    Inventor: Tamotsu Shirai
  • Publication number: 20140029146
    Abstract: Disclosed herein is a device comprising a protection circuit configured to protect against a polarity reversal of the input DC power supply voltage, the protection circuit comprising an N-channel main transistor having a source coupled to an input terminal and having a drain coupled to an output terminal, a command circuit configured to render the main transistor blocked in the event of a polarity reversal and conducting otherwise, and a control circuit configured to dynamically adjust the bias of substrate regions of respective components connected to the main transistor by connecting the substrate regions either to the source or to the drain of the main transistor according to the value of the voltages present at the source and the drain of the main transistor and the type of conductivity of the substrate regions.
    Type: Application
    Filed: September 30, 2013
    Publication date: January 30, 2014
    Applicant: STMicroelectronics (Rousset) SAS
    Inventor: Antoine Pavlin
  • Patent number: 8638534
    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 driver circuit that controls conduction/non-conduction of the output transistor; a compensation transistor that is coupled between the output terminal and a second power supply line, and becomes conductive when the driver circuit renders the output transistor non-conductive and when a potential of the second power supply line reaches a predetermined value or greater, to maintain a non-conduction state of the output transistor; and a first resistor coupled between the second power supply line and a back gate of the compensation transistor.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: January 28, 2014
    Assignee: Renesas Electronics Corporation
    Inventor: Akihiro Nakahara
  • Patent number: 8614866
    Abstract: A hybrid switch circuit includes a hybrid switch that couples an input conductor connected to an AC power supply to an output conductor connected to a load. The hybrid switch includes a power semiconductor in parallel with an electromagnetic relay. A control circuit turns on the hybrid switch by turning on the power semiconductor at a zero-voltage crossing of the AC voltage to provide a conductive path and then closing the relay to provide a conductive bypass path that bypasses the power semiconductor. The control circuit turns off the hybrid switch by opening the relay and subsequently turning off the power semiconductor at a zero crossing of the load current. The control circuit operates in response to at least one switch control signal that indicates whether an operating fault condition exists.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: December 24, 2013
    Assignee: Electronic Systems Protection, Inc.
    Inventors: Richard J. Billingsley, Robert A. Dawley
  • Publication number: 20130335057
    Abstract: A host electronic device may be coupled to an accessory electronic device. During normal operation, the host device may supply the accessory device with power over a power supply line. Back-powering events in which the accessory device delivers power to the host device may be prevented by interposing a protection transistor in the power supply line. A current mirror may be formed using the protection transistor and an additional transistor that produces a sense current proportional to the amount of current that is flowing through the power supply line. A current-to-voltage amplifier may produce a sense voltage that is proportional to the sense current. A bias circuit may be used to bias the sense current through the current mirror. A control circuit may compare the sense voltage to one or more reference voltages and turn off the protection transistor when appropriate to prevent back-powering of the host device.
    Type: Application
    Filed: September 27, 2012
    Publication date: December 19, 2013
    Applicant: Apple Inc.
    Inventors: Rajarshi Paul, Yehonatan Perez, Stephen J. Hrinya, Eugene L. Shoykhet
  • Patent number: 8605399
    Abstract: A load driving device according to an aspect of the present invention may includes an output transistor and a load connected in series between first and second power supply lines, a protection transistor connected between a gate of the output transistor and the second power supply line, the protection transistor turning on the output transistor when a polarity of a power supply connected between the first and second power supply lines is reversed, and a resistor arranged on a line, which supplies a voltage to a back gate of the protection transistor.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: December 10, 2013
    Assignee: Renesas Electronics Corporation
    Inventor: Akihiro Nakahara
  • Patent number: 8593771
    Abstract: Power handling circuits that may be packaged as power modules, and methods of operating semiconductor devices in such circuits and modules. An exemplary circuit comprises power terminals to receive electrical power, a first semiconductor device, a first drive circuitry, and a second drive circuitry. The first drive circuitry provides a drive signal to the first semiconductor device in accordance with a desired circuit function when the electrical power received at the power terminals has the positive polarity, and ceases providing the drive circuit when the electrical power received at the power terminals has the negative polarity. During the negative polarity condition, the second drive circuitry provides a drive signals to the first semiconductor device which causes its primary current conduction path to conduct, thereby reducing the power dissipation in the device's parasitic path, and optionally causing a fuse in the circuit providing power to the circuit to blow.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: November 26, 2013
    Assignee: Fairchild Semiconductor Corporation
    Inventor: Fabio Necco
  • Publication number: 20130301175
    Abstract: A switching circuit controls the flow of current between its input and output in accordance with the state of a control signal applied to the circuit. When the control signal is in a first state and the voltage applied to the input is higher than the voltage at the output, the circuit provides a low resistance path between its input and output terminals thereby enabling current to flow from the input to the output. When the control signal is in the first state and the voltage at the output is higher than the voltage at the input, the circuit inhibits current flow from the output to the input. When the control signal is in a second state, the circuit is turned off thus inhibiting current flow between the input and the output.
    Type: Application
    Filed: July 11, 2013
    Publication date: November 14, 2013
    Inventor: BARIS POSAT
  • Patent number: 8575879
    Abstract: Embodiments of the present invention relate to methods, systems, a machine-readable medium operable in a controller, and apparatus for controlling a multi-phase inverter that drives a multi-phase electric machine. When a sensor fault is detected, a phase current angle is computed based on the feedback stator currents, and used to estimate an angular velocity and an angular position of a rotor of the multi-phase electric machine. When the estimated angular velocity of the multi-phase electric machine is less than a transition angular velocity threshold, an open-circuit response can be applied at the multi-phase inverter by controlling all switches in the multi-phase inverter drive to be open. By contrast, when the estimated angular velocity is greater than the transition angular velocity threshold, a short-circuit response can be applied at the multi-phase inverter by controlling selected switches in the multi-phase inverter drive to connect all phases of the multi-phase inverter to a single bus (e.g.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: November 5, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Brian A. Welchko, Min Dai
  • Patent number: 8553382
    Abstract: A circuit protection system for a power panel is disclosed. The circuit protection system includes a transistor connected in a channel of a power panel, the transistor connected between return connections of a load and a return path, and the power panel including a plurality of channels connected to the load. The circuit protection system also includes control circuitry electrically connected in parallel with the transistor, the control circuitry configured to selectively activate the transistor to allow current to pass through the transistor based on an observed voltage across the transistor.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: October 8, 2013
    Assignee: ADC Telecommunications, Inc.
    Inventor: Joseph C. Coffey
  • Patent number: 8547671
    Abstract: The electronic device for protecting against a polarity reversal of a DC power supply voltage comprises, produced within one and the same integrated circuit, an N-channel main transistor (TP) mounted on the line of expected positive polarity of the power supply voltage and command means (MCM) for the main transistor comprising a charging pump circuit (CP), associated with a dynamic biasing circuit (MCTRL) for the substrate regions of active components connected to the main transistor.
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: October 1, 2013
    Assignee: STMicroelectronics (Rousset) SAS
    Inventor: Antoine Pavlin
  • Publication number: 20130242444
    Abstract: The present invention relates to a protective device for protection of an electrical circuit equipped with a smoothing capacitor against reversal of polarity of the input voltage, with an input via which the protective device can be connected to a voltage supply for coupling in an input voltage, with an output via which the protective device an be connected to the electrical circuit to be protected, with a controllable switch which is arranged between an input terminal of the input and an output terminal of the output having the same polarity and which is designed to interrupt a current flow between the input terminal and the output terminal which are connected to one another, and with a control unit which is designed to control the controllable switch, when an applied input voltage with reverse polarity is detected, in such a way that the interruption of the current flow takes place with a time lag relative to a time of the application of the input voltage with reverse polarity.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 19, 2013
    Inventor: Stefan Zick
  • Patent number: 8508898
    Abstract: Systems and methods of diagnosing a condition of a reverse-voltage protection switch in an electric system. The electric system includes a power source, an electric load, and a reverse-voltage protection switch in a series-type configuration. The electric system further includes a ground switch configured to selectively connect the source terminal of the reverse-voltage protection circuit to ground. The terminals of the reverse-voltage protection circuit are disconnected from the power source. The ground switch is closed to connect one terminal of the reverse-voltage protection switch to ground. A bias voltage is applied to the other terminal of the reverse-voltage protection switch and the reverse-voltage protection switch is opened. An improper short-circuit condition across the reverse-voltage protection switch is detected when the voltage at the biased terminal of the reverse-voltage protection switch is less than a threshold when the reverse-voltage protection switch is opened.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: August 13, 2013
    Assignee: Robert Bosch GmbH
    Inventors: David Burnham, Michael R. Meier
  • Patent number: 8466622
    Abstract: For determining a wave running time between a RF source in a plasma power supply device and a load connected to the plasma power supply device, an RF pulse is transmitted forwards from the RF source to the load. The pulses are reflected by the load and transmitted backwards to the power source. A return time measured on arrival of the pulse(s) at the inverter is used to determine a wave running time.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: June 18, 2013
    Assignee: Huettinger Elektronik GmbH + Co. KG
    Inventor: Hanns-Joachim Knaus
  • Publication number: 20130107406
    Abstract: A wireless field device for use in an industrial process control system includes a power source having a power source output. Field device is circuitry powered by the power source output. A protection circuit is configured to protect the field device circuitry. The protection circuit include reverse polarity protection circuit coupled to the power source output that electrically isolates the power source output from the field device circuitry in response to a reverse polarity connection between the power source output and the field device circuitry. An overvoltage protection circuit disconnects the power source output from the field device circuitry is a voltage of the power source output exceeds a threshold.
    Type: Application
    Filed: October 31, 2011
    Publication date: May 2, 2013
    Inventors: James A. Johnson, Richard L. Nelson
  • Patent number: 8351172
    Abstract: A power supply control apparatus 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 discharge transistor coupled between a gate of the output transistor and the output terminal, and rendered conductive when the output transistor is brought into a non-conduction state, a negative voltage control unit coupled between the first power supply line and the gate of the output transistor, and bringing the output transistor into a conduction state when the counter electromotive voltage applied to the output terminal from the load exceeds a predetermined value, a diode having a cathode coupled with the first power supply line, and an anode, a third resistor provided between the anode of the diode and a second power supply line, and a compensation transistor coupled between the second power supply line and the output terminal.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: January 8, 2013
    Assignee: Renesas Electronics Corporation
    Inventor: Akihiro Nakahara
  • Publication number: 20120314330
    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: Application
    Filed: August 17, 2012
    Publication date: December 13, 2012
    Inventor: Charles E. Norman
  • Patent number: 8295019
    Abstract: The polarity reversal protection unit comprises a pyrotechnic disconnecting unit, a detector device, a tripping element, a first connection element electrically connected with at least one consumer connection and a second connection element electrically connecting a supply support point with the first connection element. The pyrotechnic disconnecting unit is arranged on at least one of the connection elements. The tripping element has a first connection, electrically insulated from the connection elements, to the detector device and a second connection to one of the connection elements, so that a current flow in the tripping element causes a triggering of the pyrotechnic disconnecting unit. The triggering of the pyrotechnic disconnecting unit causes an electrical disconnection of the first and second connection elements.
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: October 23, 2012
    Assignee: Auto Kabel Managementgesellschaft mbH
    Inventor: Frank Gronwald
  • Patent number: 8270133
    Abstract: A power supply control apparatus 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 coupled between a gate of the output transistor and a second power supply line; a negative voltage control unit coupled between the first power supply line and the gate of the output transistor; a compensation transistor bringing the second power supply line and the output terminal into a conduction state when a counter electromotive voltage from the load is applied to the output terminal; and a back gate control circuit that controls the second power supply line and a back gate of each of the compensation transistor and the protection transistor to be brought into a conduction state in a standby state when the polarity of the power supply is normal.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: September 18, 2012
    Assignee: Renesas Electronics Corporation
    Inventor: Akihiro Nakahara