Control Circuits For Electromagnetic Devices Patents (Class 361/139)
  • Patent number: 10916393
    Abstract: A system for actuating a vacuum bottle of an electrical device, the vacuum bottle being connected in a circuit shunting a main circuit of a phase of the electrical device and comprising a movable electrode and a fixed electrode. The actuating system comprises a shunt contact which is connected to a movable contact of the main circuit during a movement of opening the electrical device, and an electromagnet whose coil is connected between the movable electrode and the shunt contact, and whose core is mechanically linked with the movable electrode, such that the core drives the movable electrode to the open position only when the value of the current which passes through the coil reaches a predetermined threshold.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: February 9, 2021
    Assignee: Schneider Electric Industries SAS
    Inventors: Mathieu Bono, Eloïse Bonjean
  • Patent number: 10788535
    Abstract: A method is provided for determining the operating status a MV switching apparatus. The method includes providing a test signal to the test winding for an observation period of time, the test signal having a waveform capable of exciting the magnetic element; obtaining first measuring data indicative of a voltage at first terminals of the capacitor bank during the observation period of time; obtaining second measuring data indicative of a voltage at second terminals of the test winding and indicative of a current circulating along the test winding during the observation period of time; and, calculating estimation data indicative of the operating status of the capacitor bank at the end of the observation period of time on the basis of the first and second measuring data, the first estimation data comprising a first estimation value indicative of the capacitance of the capacitor bank.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: September 29, 2020
    Assignee: ABB Schweiz AG
    Inventors: Gabriele Valentino De Natale, Marco Testa, Andrea Ricci, Andrea Bianco
  • Patent number: 10770886
    Abstract: To provide an electromagnetic bad driving device capable of performing failure diagnosis of a relay more frequently. The electromagnetic bad driving device according to the present invention, interrupts the relay while an electromagnetic induction bad is under control, and diagnoses the relay on the basis of a surge voltage occurring at the interruption.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: September 8, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventor: Kentarou Jyumonji
  • Patent number: 10677375
    Abstract: Some embodiments provide irrigation valve control apparatuses comprising: a solenoid configured to cooperate with a plunger; an input stimulus source coupled with the solenoid and configured to apply an input stimulus while a plunger drive signal is not being applied and that is sufficiently small to not cause the plunger to move; sampling circuitry configured to measure one or more voltage measurements corresponding to one or more voltages across the solenoid, wherein the one or more voltage measurements are dependent upon the current position of the plunger relative to the solenoid; and control circuitry cooperated with the sampling circuitry to receive the one or more voltage measurements from the sampling circuitry, wherein the control circuitry is configured to determine whether the plunger is in one of the open and closed positions based on the one or more voltage measurements.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: June 9, 2020
    Assignee: Rain Bird Corporation
    Inventors: Manuel J. Ferrer Herrera, Steven M. Lurcott, Todd K. Roper
  • Patent number: 10634147
    Abstract: A magnetic bearing vacuum pump comprises: a first displacement signal generation section configured to amplify, by a resolution multiplying factor K of K>1, a displacement modulated wave signal modulated according to a displacement of the rotor from a predetermined position to generate a high-resolution displacement signal in a first displacement region including the predetermined position; a second displacement signal generation section configured to generate a low-resolution displacement signal in a larger second displacement region including the first displacement region; a selection section configured to select either one of the high-resolution displacement signal or the low-resolution displacement signal based on an unsteady-state response signal obtained by excluding a steady-state whirling displacement component from the high-resolution displacement signal or the low-resolution displacement signal; and a bearing control section configured to control the magnetic bearing based on the displacement sig
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: April 28, 2020
    Assignee: Shimadzu Corporation
    Inventor: Junichiro Kozaki
  • Patent number: 10560045
    Abstract: A driving device for multi-axis common-mode voice coil motor is provided, which includes a control signal processing interface and a plurality of drive-stage circuits. The control signal processing interface generates a plurality of control signals and a plurality of command signals. The drive-stage circuits receive the control signals and the command signals respectively; each of the drive-stage circuits is connected to one end of one of the coils of a voice coil motor and includes a half-bridge switch circuit; the drive-stage circuit controls the half-bridge switch circuit to generate a driving current to drive the coil according to the control signal. The drive-stage circuit compares the feedback signal of the feedback elements of the coil loop with the command signal to generate an adjustment signal and adjusts the driving current according to the adjustment signal, such that the driving current can track the command signal.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: February 11, 2020
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventor: Chieh-Yi Huang
  • Patent number: 10460896
    Abstract: A relay control device is provided configured to reduce the amount of power supplied to a coil in an electromagnetic relay. The relay control device includes a control unit for generating and outputting a PFM signal to control the voltage-drop DC/DC converter unit, a filter unit allowing passage of the PFM signal, and a circuit unit controlling the operation of the voltage-drop DC/DC converter unit in accordance with the output signal of the filter unit. If the filter unit does not allow passage of the PFM signal, the circuit unit prevents the voltage-drop DC/DC converter unit from dropping the voltage, and performs control so as to output the power supply voltage to a coil in the electromagnetic relay. If the filter unit prevents the PFM signal from passing, a current path from a power supply potential to a ground potential within a circuit unit is cut off by transistors.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: October 29, 2019
    Assignees: AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventor: Yuuki Sugisawa
  • Patent number: 10355670
    Abstract: Provided an active suppression controller with an adaptive algorithm capable of tracking the fluctuation of multi-fundamental frequencies and correcting them while the deviation is divergence based on the DXHS (Delayed-X Harmonics Synthesizer). It includes a controller's architecture, an adaptive frequency tracking & correcting algorithm and its FPGA implementation structure in real-time.
    Type: Grant
    Filed: May 5, 2018
    Date of Patent: July 16, 2019
    Inventor: Baisheng Yu
  • Patent number: 10338643
    Abstract: A magnetic electronic device includes a first body and a second body. The first body includes a first case and a magnetic member inside the first case. The second body includes a second case and includes a magnetic sensor, a magnetism guiding member and a switch control component inside the second case. The second case is connected to the first body to be movable relative to the first body. The magnetic sensor is disposed on the magnetism guiding member, and the switch control component is electrically connected to the magnetic sensor. The magnetism guiding member guides the magnetic field caused by the magnetic member, and the magnetic sensor detects the magnetic flux caused by the magnetic member. When the magnetic flux is larger than a first value, the switch control component switches a component's switch.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: July 2, 2019
    Assignee: HOLYGO CORPORATION
    Inventor: Chien-Te Wu
  • Patent number: 10337637
    Abstract: An electromagnetic valve includes a valve body, a valve core, and an electromagnetic drive device. The valve body has an operation chamber, wherein the valve core is movably arranged in the operation chamber. The electromagnetic drive device is arranged in the valve core and is suitable for being electrically connected with a power source. The electromagnetic drive device is arranged, when driving the electromagnetic valve, to provide the valve core with a starting drive so as to drive the valve core to enter a running state. After the valve core is driven to enter the running to state, to provide the valve core with a maintaining drive so as to keep the valve core in the running state.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: July 2, 2019
    Assignee: NINGBO HOYEA MACHINERY MANUFACTURE CO., LTD.
    Inventors: Guoliang Tao, Feifei Chen, Ce Zhang, Zhidan Weng
  • Patent number: 10320276
    Abstract: A scalable, highly dynamic electromagnetic linear drive with limited travel. The linear actuator is distinguished by low transverse forces.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: June 11, 2019
    Assignee: RHEFOR GBR
    Inventor: Arno Mecklenburg
  • Patent number: 10302220
    Abstract: Some embodiments provide irrigation valve control apparatuses comprising: a solenoid configured to cooperate with a plunger; an input stimulus source coupled with the solenoid and configured to apply an input stimulus while a plunger drive signal is not being applied and that is sufficiently small to not cause the plunger to move; sampling circuitry configured to measure one or more voltage measurements corresponding to one or more voltages across the solenoid, wherein the one or more voltage measurements are dependent upon the current position of the plunger relative to the solenoid; and control circuitry cooperated with the sampling circuitry to receive the one or more voltage measurements from the sampling circuitry, wherein the control circuitry is configured to determine whether the plunger is in one of the open and closed positions based on the one or more voltage measurements.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: May 28, 2019
    Assignee: Rain Bird Corporation
    Inventors: Manuel J. Ferrer Herrera, Steven M. Lurcott, Todd K. Roper
  • Patent number: 10177299
    Abstract: A method for controlling a piezoelectric actuator of a fuel injector of an internal combustion engine of a vehicle, the actuator acting on valve elements to open or close the injector, respectively enabling or stopping the injection of fuel into a combustion chamber of the engine, includes the steps of: applying to the actuator a first nominal electric charge required to open the injector in accordance with the torque requested and the engine speed, to open the valve elements for fuel injection, instructing the closure of the injector to stop the fuel injection, by applying an electric discharge to the actuator to close the valve elements, the method applied from an on-board engine control unit during operation, and including applying to the actuator between these 2 steps at least one second electric charge to polarize the actuator during an opening phase of the injector and during fuel injection.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: January 8, 2019
    Assignees: CONTINENTAL AUTOMOTIVE FRANCE, CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Michael Leblon, Alain Atanasyan, Jeremie Memain
  • Patent number: 9934923
    Abstract: A relay circuit includes a power supply to apply an AC input line voltage to the relay circuit, a relay coil and at least one pair of contacts actuated by the relay coil. A zero cross detection circuit and a control logic circuit for the relay circuit are also disclosed. The control logic circuit determines a zero crossover point in response to an output signal from the zero crossover detection circuit, and controls a relay coil to actuate the relay contacts to switch a load at the zero crossover point of a load current when the load is connected to the at least one pair of relay contacts, such that the voltage and current across the relay contacts is zero.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: April 3, 2018
    Assignee: TE CONNECTIVITY CORPORATION
    Inventors: Mohammad Siddique Ahmed, Raymond Howard Kohler, Ganesh Bhatt, Alexander King
  • Patent number: 9817478
    Abstract: A vibration device includes a touch panel, a vibrator that is arranged on the touch panel, a frame that is separated from at least a part of the touch panel and is arranged to surround the touch panel in a planar view, and a first connecting member that is arranged on the touch panel and the frame to cover a space between a part of the touch panel and the frame in a planar view and that connects the touch panel and the frame. Furthermore the first connecting member includes a first member positioned on the operation panel, a second member positioned on the frame, and a third member covering a space in a planar view. The thickness of the third member is smaller than those of the first and second members.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: November 14, 2017
    Assignee: KYOCERA CORPORATION
    Inventors: Shinya Nakamura, Kenji Kouno, Jun Takeda
  • Patent number: 9657774
    Abstract: A magnetic bearing device includes a first carrier generation section which generates a first carrier signal, and a second carrier generation section which generates a second carrier signal whose phase differs by (?/2+?) radian from the phase of the first carrier signal. In addition, the magnetic bearing device includes a first demodulation section which performs demodulation by sampling the first modulated signal at sampling timing shifted by a phase ? from timing at which the first carrier signal becomes a peak. A second demodulation section performs demodulation by sampling the second modulated signal at sampling timing shifted by a phase (??) from timing at which the second carrier signal becomes a peak. A controller controls current in each of the first radial electromagnet and the second radial electromagnet, based on a result of the demodulation by each of the first demodulation section and the second demodulation section.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: May 23, 2017
    Assignee: Shimadzu Corporation
    Inventor: Junichiro Kozaki
  • Patent number: 9645122
    Abstract: A gyro sensor includes a vibrator and a drive circuit. A PWM drive signal is applied to a pair of electrodes of the vibrator. The drive circuit outputs a high level signal and a low level signal to the electrodes as the PWM drive signal. The high level signal and the low level signal have potentials higher and lower than that of the reference signal, respectively. The drive circuit outputs the high level signal to one of the pair of electrodes and the low level signal to the other of the pair of electrodes.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: May 9, 2017
    Assignee: DENSO CORPORATION
    Inventors: Shigenori Yamauchi, Takamoto Watanabe, Tomohito Terazawa
  • Patent number: 9601268
    Abstract: A circuit for delivering power to a load from a wireless power supply comprises an inductor coil for placing in the electromagnetic field of an inductor coil of a supply and a switchable capacitor bank with capacitors switchable at least between a series and a parallel configuration. The voltage across the capacitor bank is used as a feedback control parameter for controlling the capacitor bank switching. A voltage regulator is used to supply the load with a constant voltage power supply derived from the capacitor bank output.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: March 21, 2017
    Assignee: NXP B.V.
    Inventors: Ajay Kapoor, Peter Thueringer
  • Patent number: 9506475
    Abstract: An electromagnet has a core with a pair of magnetic poles, a primary coil wound around the core, and a series circuit of a first auxiliary coil wound around the first magnetic pole of the core, a second auxiliary coil wound around the second magnetic pole of the core, and capacitors, and is connected in parallel to the primary coil and the series circuit. The first and the second magnetic poles are each divided into a plurality of split magnetic poles. The first auxiliary coil is composed of a plurality of split auxiliary coils wound around the respective pole in the plurality of split magnetic poles of the first magnetic pole so that the mutual inductance with the primary coil becomes zero. The second auxiliary coil is composed of a plurality of split auxiliary coils wound around the respective pole in a plurality of split magnetic poles of the second magnetic pole so that the mutual inductance with the primary coil becomes zero.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: November 29, 2016
    Assignee: Shimadzu Corporation
    Inventors: Junichiro Kozaki, Yoshihiro Nagano
  • Patent number: 9282601
    Abstract: The invention provides a method for improving operation lifetime of a capacitor module in an electronic circuit employing the capacitor module, comprising the steps of providing two or more capacitor modules of same configuration; and controlling alternately a respective one of the capacitor modules to operate in the electronic circuit for a first predetermined period of time. The invention also relates to a capacitor control circuit structure for use in a location of an electronic circuit previously occupied by an original capacitor module, and the capacitor control circuit structure exhibits the extended operation lifetime with respect to the original capacitor module. The invention also relates to the use of the capacitor control circuit structure in the electronic applications.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: March 8, 2016
    Inventor: Ping Cheung Michael Lau
  • Patent number: 9242557
    Abstract: When a rotational angle of a pedal is in a range from an angle of zero degrees to a predetermined rotational angle, which is larger than a full-opening-time rotational angle, a first Hall IC outputs a first voltage, which is twice larger than a second voltage outputted from a second Hall IC. When the rotational angle of the pedal is larger than the predetermined angle, the first Hall IC outputs a predetermined constant voltage. When an output difference, which is computed based on the first voltage and the second voltage, is equal to or smaller than a second threshold value, an abnormality of the sensed rotational angle of the pedal is determined.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: January 26, 2016
    Assignee: DENSCO CORPORATION
    Inventors: Hidekazu Watanabe, Masahiro Makino
  • Patent number: 9077214
    Abstract: To provide a magnetic bearing control device that identifies a movable range of an eddy current gap sensor configuring a magnetic bearing and a center of the movable range and easily controls a rotor shaft and other controlled shafts, which are lifted by the magnetic bearing, in a central position of a protective bearing.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: July 7, 2015
    Assignee: Edwards Japan Limited
    Inventor: Hideki Omori
  • Patent number: 9042074
    Abstract: Electrical current and/or conductivity in an electrical current channel varies in response to spatiotemporal magnetic flux pattern and/or to variation in electromotive force (EMF). For example, a channel with time-varying electrical conductivity can have induced electrical current variation due to flux pattern resulting from electrical current in another channel or set of channels; the current variation can increase magnetic flux density. The electrical currents can be transient electrical currents, and can cascade to amplify a resulting electromagnetic waveform. A channel can include the channel of a zener or zener-like diode or of a transistor, as well as an extended conductive channel. Channels can be configured in electrical current loops and in various orientations and combinations to obtain current and/or conductivity variation. A transient electrical current can be triggered in a channel, e.g.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: May 26, 2015
    Inventor: James T Beran
  • Publication number: 20150021441
    Abstract: A system and methods for redundant current-sum feedback control of an actuator system is presented. An actuator comprises actuation coils configured to actuate the actuator, and an actuation coil current sensor senses a measured total coil current comprising a sum of coil currents of each of the actuation coils. Actuator coil controllers control the actuation coils based on a commanded total coil current and the measured total coil current.
    Type: Application
    Filed: July 16, 2013
    Publication date: January 22, 2015
    Inventor: Gen Matsui
  • Patent number: 8885315
    Abstract: A multi-actuator motion control system includes a control methodology that coordinates the motion of multiple actuators while limiting the force-fight between the actuators. Control logic is provided in a relative coordinate system that allows control of the mean actuator position. Force-fight between the actuators is decoupled from the actuator position by estimating load forces on the actuator using reduced-order observers.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: November 11, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Michael C. Harke
  • Patent number: 8853905
    Abstract: Provided is a radial direction controller capable of handling changes in negative bearing stiffness according to the mounting orientation.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: October 7, 2014
    Assignee: Osaka Vacuum, Ltd.
    Inventors: Tetsuro Ohbayashi, Mitsunori Watanabe
  • Publication number: 20140285925
    Abstract: A driver circuit includes a first current source configured to sink part of the current from a power supply through a load and a second current source configured to sink part of the current from the power supply to a return path, bypassing the load, so that the current through the load is the difference between the current from the power supply and the current through the second current source.
    Type: Application
    Filed: March 22, 2013
    Publication date: September 25, 2014
    Applicant: Texas Instruments Incorporated
    Inventors: Rajarshi Mukhopadhyay, Paul Merle Emerson
  • Publication number: 20140285930
    Abstract: Methods may be provided to control an electro-permanent magnetic device powered from an AC mains power source provided through first and second power lines of a controller, wherein a first switch is provided on the first power line between the AC mains power source and the electro-permanent magnetic device and a second switch is provided on the second power line between the AC main power source and the electro-permanent magnetic device. In particular, a sequence of switching pulses may be transmitted through the first and second switches to change a magnetic state of the electro-permanent magnetic device. Related controllers are also discussed.
    Type: Application
    Filed: March 24, 2014
    Publication date: September 25, 2014
    Applicant: WEN TECHNOLOGY, INC.
    Inventor: John W. Powell
  • Patent number: 8830648
    Abstract: A magnetic manipulation and navigation system for moving a magnetic element through a body comprising at least six electromagnets fixed in relation to said body and a control unit supplying the current for the electromagnets. The electromagnets have soft magnetic cores and the current supplied by the control unit to each of the electromagnets is adapted to operate the electromagnetic coils of each of the electromagnets in their core's linear regions being delimited by the value of the flux density of each electromagnet being in an interval between the negative and positive saturation value of each electromagnet, the lower representation showing the deviation due to the use of soft magnetic cores in all electromagnets.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: September 9, 2014
    Assignee: ETH Zurich
    Inventors: Jake J. Abbott, Bradley Kratochvil, Michael P. Kummer, Bradley Nelson
  • Patent number: 8798802
    Abstract: A method of queuing access to a power supply shared by a set of electrical access points. The access points turn on independently from one another and thus have independent power draws. Each access point has a specific power draw when on. The on state and associated power draw of each of access point is identified, and a load duration curve for each access point is normalized (i.e., combined with load duration curve(s)) from the other access points) into a probability distribution function. The probability distribution function is a normalized load duration curve that thus accounts for a varying set of “operating states” that may occur with respect to the set of access points (when viewed collectively). Each operating state has an associated probability of occurrence. As the operating state of the set (of access points) changes, access to the power supply is selectively queued, or de-queued (if previously queued).
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: August 5, 2014
    Assignee: eCurv, inc.
    Inventors: Edison Almeida, Jonathan O. Stahl
  • Patent number: 8760836
    Abstract: An electrical component having a primary winding, a first field-effect transistor, configured as a switch of the primary winding, for switching the primary winding, a quench winding for quenching the inductive load of the primary winding when switching off the primary winding, and a second field-effect transistor, configured as a switch of the quench winding, for switching the quench winding. In the process, the first field-effect transistor is operated in linear operation and the second field-effect transistor is operated in linear operation or in a clock-pulsed operation between the linear operation and a switched-off state during a switching-off process of the quench winding.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: June 24, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Sven Hartmann, Harald Schueler, Stefan Tumback
  • Patent number: 8737034
    Abstract: A method determines a change in the activation state of an electromagnetic actuator.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: May 27, 2014
    Assignee: Infineon Technologies AG
    Inventors: Herbert Gietler, Heinz Zitta
  • Patent number: 8693158
    Abstract: A method and apparatus provide an improved EM reverberation chamber which facilitates the dynamic three dimensional (3D) manipulation of EM field polarization within the chamber and produces a uniform field distribution inside the chamber. The chamber includes one or more walls with tunable lumped elements. A controller is provided to generate one or more control signals that are applied to the lumped elements and tunes their impedance in response to the one or more control signals. The result is to generate, within the chamber an electromagnetic field that appears to be random or pseudo-random in polarization, but which is sufficiently uniform in magnitude for EM testing.
    Type: Grant
    Filed: January 18, 2012
    Date of Patent: April 8, 2014
    Assignee: The University of Hong Kong
    Inventors: Weng Cho Chew, Bo Zhu, Lijun Jiang, Qi Dai
  • Publication number: 20140027216
    Abstract: The electromagnetic vibration suppression device includes a plurality of electromagnet pairs arranged in the width direction of a steel plate and which suppresses vibration of the steel plate running between electromagnets in each electromagnet pair using a control unit. The pseudo displacement calculation means calculates a pseudo displacement amount for the steel plate on the basis of the switching between ON and OFF of a sensor attached to the electromagnet pairs. The pseudo edge position calculation means calculates a pseudo edge position for the steel plate on the basis of the pseudo displacement amount. The current amount control means individually controls the amount of current that flows to the electromagnets on the basis of the pseudo edge position.
    Type: Application
    Filed: March 27, 2012
    Publication date: January 30, 2014
    Applicant: SINFONIA TECHNOLOGY CO., LTD.
    Inventors: Hisanori Ohara, Kazuhisa Matsuda
  • Publication number: 20140009859
    Abstract: A method and system for moving magnetic material includes an electromagnet wherein known problems associated with DC power circuit interruptions are substantially reduced. The system includes a generator coupled to an electromagnet, the generator being powered by a power supply through a first set of contactors which are configured to open and close a first circuit between the power source and the generator coupled to the magnet to start and stop a lifting sequence, wherein the first circuit includes a first bridge rectifier, a reactance element, and a first resistance element.
    Type: Application
    Filed: September 9, 2013
    Publication date: January 9, 2014
    Applicant: Ephaugh, Inc.
    Inventor: John Samila
  • Patent number: 8625249
    Abstract: A control apparatus for an electromagnetic inductive load is a circuit in which a switching element that is PWM-controlled and the electromagnetic inductive load are connected together in series between a DC power supply and a ground. The control apparatus includes a current sensing unit which senses a regenerative current in an OFF time in a PWM driving operation, a current detecting unit which outputs a current detection signal when a sense current becomes smaller than a target current amount, a PWM signal generating unit which receives a clock signal and the current detection signal, and generates a PWM signal that is at a high or low level during a period from the current detection signal being smaller than the target current amount, to rising or falling of the clock signal, and a driving unit which controls to drive the switching element.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: January 7, 2014
    Assignee: Yazaki Corporation
    Inventors: Eiichirou Ooishi, Mitsuaki Morimoto
  • Patent number: 8614873
    Abstract: Electrical current and/or conductivity in an electrical current channel varies in response to spatiotemporal magnetic flux pattern and/or to variation in electromotive force (EMF). For example, a channel with time-varying electrical conductivity can have induced electrical current variation due to flux pattern resulting from electrical current in another channel or set of channels; the current variation can increase magnetic flux density. The electrical currents can be transient electrical currents, and can cascade to amplify a resulting electromagnetic waveform. A channel can include the channel of a zener or zener-like diode or of a transistor, as well as an extended conductive channel. Channels can be configured in electrical current loops and in various orientations and combinations to obtain current and/or conductivity variation. A transient electrical current can be triggered in a channel, e.g.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: December 24, 2013
    Inventor: James T. Beran
  • Patent number: 8576534
    Abstract: Disclosed is an electronic magnetic contactor, the contactor including: an operation power supply unit inputting an operation power; an electronic switch driving unit receiving a power from the operation power supply unit to drive a power supply of a load; a switching unit switched by a pulse signal to drive the electronic switch driving unit; an operation state determination unit determining whether the electronic magnetic contactor is in an opened state or in a closed state; an input voltage sensing unit sensing an amplitude of an input voltage supplied from the operation power supply unit; and an input signal generation unit generating an input signal for determining whether the electronic magnetic contactor is inputted based on determined state by the operation state determination unit and the sensed amplitude by the input voltage sensing unit.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: November 5, 2013
    Assignee: LSIS Co., Ltd.
    Inventor: Jae Hyuk Choi
  • Patent number: 8561594
    Abstract: In an internal combustion engine controller, a clock trouble determination signal from a clock trouble determining circuit that diagnoses any clock input trouble is transmitted in parallel with an abnormality diagnosis signal outputted from an abnormality diagnosing circuit and causes it to be inputted to a trouble/abnormality signal output circuit, and the trouble/abnormality signal output circuit achieves logical summing to output one line of resultant trouble/abnormality output OR signals to a microprocessor (MP). The MP outputs to the trouble/abnormality signal output circuit a trouble/abnormality confirmation input signal, and makes definite any of an abnormal state, a clock trouble state and a normal state based on the result of switching control of the status level of the pertinent trouble/abnormality output OR signal.
    Type: Grant
    Filed: July 8, 2010
    Date of Patent: October 22, 2013
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Ryoichi Oura, Mitsuhiko Watanabe, Takuya Mayuzumi, Masahiro Toyohara
  • Publication number: 20130242451
    Abstract: A system for and method of providing overload protection for an active material actuator, includes a magnetically functioning mechanism comprising, for example, one or more permanent or electromagnets, and/or magnetorheological fluid, and configured to produce a holding force less than the capacity of the actuator, and more preferably, a modifiable holding force responsive to load influencing conditions.
    Type: Application
    Filed: March 15, 2012
    Publication date: September 19, 2013
    Applicant: GM Global Technology Operations LLC
    Inventors: Nancy L. Johnson, Alan L. Browne, Xiujie Gao, Nilesh D. Mankame, Paul W. Alexander, Pablo D. Zavattieri
  • Patent number: 8531813
    Abstract: A method and system for moving magnetic material includes an electromagnet wherein known problems associated with DC power circuit interruptions are substantially reduced. The system includes a generator coupled to an electromagnet, the generator being powered by a power supply through a first set of contactors which are configured to open and close a first circuit between the power source and the generator coupled to the magnet to start and stop a lifting sequence, wherein the first circuit includes a first bridge rectifier, a reactance element, and a first resistance element.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: September 10, 2013
    Assignee: Ephaugh, Inc.
    Inventor: John Samila
  • Patent number: 8520356
    Abstract: The invention relates to a relay controller for controlling an excitation current of a relay, wherein the relay controller is designed, upon the energization of the relay by means of a switch, to control the excitation current through the excitation winding of the relay in such a way that through the excitation winding there flows firstly a pull-in current and, after a pull-in time has elapsed, through the excitation winding there flows a holding current that is lower than the pull-in current, and wherein the relay controller is designed, upon the switching-off of the relay by means of the switch, to feed a commutation current that flows through the excitation winding to the commutation device through the first terminal and through the second terminal of the relay controller.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: August 27, 2013
    Inventor: Michael Lenz
  • Publication number: 20130208389
    Abstract: A multi-layer, multi-turn structure for an inductor having a plurality of conductor layers separated by layers of insulator is described. The inductor further comprises a connector electrically connected between the conductor layers. The structure of the inductor may comprise a cavity therewithin. The structure of the inductor constructed such that electrical resistance is reduced therewithin, thus increasing the efficiency of the inductor. The inductor is particularly useful at operating within the radio frequency range and greater.
    Type: Application
    Filed: March 12, 2013
    Publication date: August 15, 2013
    Inventor: NUCURRENT, INC.
  • Publication number: 20130208390
    Abstract: A multi-layer, multi-turn structure for an inductor having a plurality of conductor layers separated by layers of insulator is described. The inductor further comprises a connector electrically connected between the conductor layers. The structure of the inductor may comprise a cavity therewithin. The structure of the inductor constructed such that electrical resistance is reduced therewithin, thus increasing the efficiency of the inductor. The inductor is particularly useful at operating within the radio frequency range and greater.
    Type: Application
    Filed: March 12, 2013
    Publication date: August 15, 2013
    Applicant: NUCURRENT, INC.
    Inventor: NUCURRENT, INC.
  • Patent number: 8508905
    Abstract: A coil-driving apparatus of an electro magnetic contactor is disclosed, which replaces the main units in an analog scheme with those in a digital scheme using a PWM controller of low power consumption to reduce the number of the analog components, minimize power consumption, and controls a constant voltage that flows on the coil by receiving the feedback current flowing on the coil, whereby error and defect generation rates are reduced, and deterioration and burning of components are prevented.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: August 13, 2013
    Assignee: LS Industrial Systems Co., Ltd.
    Inventor: Seung Moon Baek
  • Publication number: 20130201589
    Abstract: A multi-layer, multi-turn structure for an inductor having a plurality of conductor layers separated by layers of insulator is described. The inductor further comprises a connector electrically connected between the conductor layers. The structure of the inductor may comprise a cavity therewithin. The structure of the inductor constructed such that electrical resistance is reduced therewithin, thus increasing the efficiency of the inductor. The inductor is particularly useful at operating within the radio frequency range and greater.
    Type: Application
    Filed: March 12, 2013
    Publication date: August 8, 2013
    Inventor: NuCurrent, Inc.
  • Patent number: 8488292
    Abstract: A magnetic-field generating device includes at least one magnetic-field generator configured to generate a magnetic field so as to provide at least one magnetic gap for receiving objects upon which the magnetic field acts. At least one magnetic-field measuring device is disposed within a measuring-device receiving region outside of the magnetic gap. The at least one magnetic-field measuring device is configured to provide at least one measurement signal useable as an input signal for controlling the at least one magnetic-field generator.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: July 16, 2013
    Assignee: GSI Helmholtzzentrum fuer Schwerionenforschung GmbH
    Inventor: Rudolf Steiner
  • Patent number: 8416551
    Abstract: A starter including a double contact electromagnetic contactor (10) having an electrically controllable micro-actuator of the micro-solenoid type and an associated electronic control device (ECC). The electronic control device includes a first transistor commutation (T1, T2, CZ2, RC1, RC3, SL) to control the excitation of a pull-in winding (La) of the contactor and a second transistor commutation (T3, CZ2, RC2) to control the excitation of the micro-actuator. The second transistor commutation controls the excitation of the micro-actuator (MS) for a predetermined duration after activation of the electronic control device.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: April 9, 2013
    Assignee: Valeo Equipments Electriques Moteur
    Inventor: Stéphane Plaideau
  • Patent number: 8351177
    Abstract: A method for discharging an industrial lifting magnet quickly without producing a high voltage transient is presented. Most of the stored magnetic energy is dissipated in the magnet itself by connecting a diode across the magnet in the appropriate direction at discharge time using switching devices. One variation, suitable for smaller magnets, discharges the remaining energy using DC capacitors and a diode switching network. Another variation, suitable for magnets of any size, discharges most of the remaining energy in a power resistor of modest size using a system of diodes and switching devices in conjunction with a relatively small AC capacitor across the magnet.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: January 8, 2013
    Inventor: Michael Allen Weed
  • Publication number: 20130003244
    Abstract: Aspects of a method and system for a transformer in an integrated circuit package are provided. In this regard, signals may be transmitted and/or received via an antenna communicatively coupled to a transformer embedded in multi-layer integrated circuit package. The windings ratio of the transformer may be configured based on an impedance of the antenna, an impedance of a transmitter coupled to the transformer, an impedance of an LNA coupled to the transformer, and/or a power level of the received and/or transmitted signals. The windings ratio may be configured via one or more switching elements which may be MEMS switches embedded in the multi-layer IC package. The transformer may comprise a plurality of loops fabricated on a corresponding plurality of metal layers in the multi-layer IC package, and the loops may be communicatively coupled with one or more vias. The multi-layer IC package may comprise ferromagnetic and/or ferromagnetic materials.
    Type: Application
    Filed: September 12, 2012
    Publication date: January 3, 2013
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran