Noise, Sound, Vibration, Movement Or Position Of Motor Patents (Class 318/128)
  • Patent number: 10228626
    Abstract: A movable support configured to support an object, the support including: a support plane to support the object, an actuator assembly to move the movable support in a first direction and in a second direction perpendicular to the first direction, wherein the first direction and the second direction extend in a plane parallel to the support plane, wherein the actuator assembly includes: a first actuator configured to exert a first actuation force in a first actuation direction, the first actuation direction being parallel to the support plane, a second actuator configured to exert a second actuation force in a second actuation direction, the second actuation direction being parallel to the support plane, wherein the first actuation direction and the second actuation direction are arranged non-parallel and non-perpendicular with respect to each other.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: March 12, 2019
    Assignee: ASML Netherlands B.V.
    Inventors: Antonius Franciscus Johannes De Groot, Theo Anjes Maria Ruijl, Christiaan Louis Valentin, Christian Werner
  • Patent number: 10145265
    Abstract: A method for balancing rotating machinery, such as gas turbine engines, to minimize vibrations. The method involves operation of the engine for a period of time at varying power levels and ranges of other operational parameters representative of the system operating envelope to obtain vibration data (amplitude and phase) for the full range of dynamic responses of interest. This usually includes time at elevated power settings until the engine reaches thermal stability, altitude variation, etc. as well as the full engine operating range. The full set of vibration data measured during the engine run is analyzed to generate unique unbalance states. The unique unbalance states are then analyzed and the mean unbalance state is identified. Balancing masses can then be installed or removed in accordance with a balance solution that is equal and opposite to the mean unbalance state.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: December 4, 2018
    Assignee: The Boeing Company
    Inventors: Timothy L. Skilton, Kevin J. Pittenger
  • Patent number: 9954471
    Abstract: A motor control unit includes an H-bridge circuit, a current detection part and a control part. The current detection part includes current detection resistors provided at both sides of a DC motor. The control part feedback-controls high-side arm switches and low-side arm switches of the H-bridge circuit so that a detection value of the current detection part follows a target value. In the feedback control, normal control and current circulation control are performed alternately. In the current circulation control, either the high-side arm switches or the low-side arm switches are turned on for both of normal rotation time and reverse rotation time. The control part performs the feedback control based on a detection value of the current detection resistor, which has the same potential reference between the normal control and the current circulation control under the same rotation direction.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: April 24, 2018
    Assignee: DENSO CORPORATION
    Inventor: Tomoya Tanizawa
  • Patent number: 9869601
    Abstract: A device for detecting the motion of a rotatable compactor roller about a compactor roller axis of rotation includes at least one motion sensor and an energy supply for the at least one motion sensor. The energy supply includes a generator having a stator and a rotor rotatable about a rotor axis of rotation with respect to the stator.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: January 16, 2018
    Assignee: Hamm AG
    Inventor: Werner Völkel
  • Patent number: 9815160
    Abstract: A percussion unit for a rotary hammer and/or percussion hammer includes a control unit that is configured for open-loop and/or closed loop control of a pneumatic percussion mechanism. In at least one operating state in which the control unit changes from an idle mode to a percussion mode, the control unit is configured to adjust at least one operating parameter temporarily to a starting value.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: November 14, 2017
    Assignee: Robert Bosch GmbH
    Inventors: Rainer Nitsche, Matthias Tauber, Antoine Vandamme, Gerd Schlesak, Helge Sprenger, Carsten Diem, Wolfgang Fischer, Haris Hamedovic, Juergen Lennartz, Christian Bertsch, Mario Eduardo Vega Zavala, Achim Duesselberg
  • Patent number: 9772254
    Abstract: A shaker test system with a class D power amplifier having an analog to digital converter to receive an analog input signal and convert the analog input signal to a digital signal, pulse width modulation logic coupled to the analog to digital converter to provide a delay time to a delay line to control a transition time of a pulse width modulated signal responsive to an output of the analog to digital converter, and a class D power output stage coupled to the delay line and responsive to the pulse width modulated signal to provide an output of the class D power amplifier stage. The class D amplifier allows use of a low cost microcontroller to obtain very small pulse width increments using a low cost microcontroller to provide a low cost shaker test system incorporating the class D power amplifier.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: September 26, 2017
    Assignee: Lus & Butts, LLC
    Inventor: Gary C. Butts
  • Patent number: 9496481
    Abstract: A controlling device for a vibration type actuator includes an AC voltage generating unit in which at least one of parameters, namely a frequency, an amplitude, and a phase of an AC voltage for use in applying an excitation force to a vibrating member, is settable; a measuring unit which measures some physical quantities caused by a vibration of the vibrating member; a variation imparting unit which imparts a predetermined variation to at least one of the parameters of the AC voltage; a frequency-response characteristic measuring unit which finds a frequency-response characteristic of at least one predetermined frequency between a first signal according to the variation and a second signal according to the measured physical quantity; and a frequency controlling unit which controls the frequency of the AC voltage according to the frequency-response characteristic.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: November 15, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kenichi Kataoka
  • Patent number: 9252696
    Abstract: A drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil. The drive signal is such that nonconducting periods are set before and after a positive current conducting period and the nonconducting periods are set before and after a negative current conducting period. A driver unit generates the drive current in response to the drive signal generated by the drive signal generating unit and then supplies the drive current to the coil. The drive signal generating unit sets the width of a nonconducting period such that, after the drive start of the linear vibration motor, the width of a nonconducting period to be set before at least the first conducting period of the drive signal is shorter than the width of a nonconducting period to be set before each conducting period during steady operation of the linear vibration motor.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: February 2, 2016
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Tsutomu Murata
  • Patent number: 8981706
    Abstract: An electric motor drive apparatus includes multiple inverter sections arranged corresponding to winding sets of a motor, multiple relays that controls power supplies to the inverter sections, and a control unit. Each inverter section and corresponding winding set are referred to as a system. The control unit includes an obtaining section that obtains a winding current, a determination section that determines a fault occurrence, a specifying section that specifies a faulty system in which the fault occurs, an interrupting section that controls the relay corresponding to the faulty system to interrupt the power supply to the faulty system, and a vibrating section that controls the inverter section of a properly-operating system to add a vibration to an output torque from the electric motor. The vibrating section gradually increases a vibration component of the vibration added to the output torque from the electric motor.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: March 17, 2015
    Assignee: Denso Corporation
    Inventor: Nobuhiko Uryu
  • Patent number: 8970141
    Abstract: A magnetic actuator system which includes a case (10) and a spindle (22) which extends through the case comprising a magnetizable material such as iron. The actuator further includes a pair of permanent magnet assemblies (14, 16) positioned fixedly within the casing with a longitudinal space there between, wherein the permanent magnet assemblies comprise an alternating plurality of north pole/south magnet sections (18) which extend longitudinally or circumferentially of the actuator. The actuator further includes a coil winding (24) which surrounds the spindle, positioned between the two permanent magnet assemblies. Magnetic pole assemblies (28, 30) attached to the spindle are positioned within the volume encompassed by the permanent magnet assemblies, such that an alternating drive signal produces an oscillating action of the spindle of desired frequency and amplitude.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: March 3, 2015
    Assignee: Koninklijke Philips N.V.
    Inventors: Pieter Johannes Bax, Johannes Hotze Bernhard De Vries, Jurriaan Bernhard Rudolf Leveling, Gert Westrup, Sepas Setayesh, Folkert Vrijburg
  • Patent number: 8963466
    Abstract: A fan array vibration control system may include a fan array having a plurality of fans, and a control unit operatively connected to the fans. The control unit is configured to operate the plurality of fans and detect a phase relationship among the plurality of fans. The control unit is configured to reduce the phase relationship among the plurality of fans in order to reduce vibrations within the fan array.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: February 24, 2015
    Assignee: Huntair, Inc.
    Inventor: Lawrence G. Hopkins
  • Patent number: 8912737
    Abstract: A linear actuator driving device is provided. The linear actuator driving device includes an electromagnetic driving unit which makes a moving element reciprocate in response to a driving command and an offset correcting unit which corrects the driving command to carry out offset energization to make the center of reciprocation of the moving element be moved in the direction in which deviation between the center of reciprocation of the moving element and the center of the movement possible range is eliminated. The offset correcting unit is configured such that the amplitude information is acquired and, with respect to the amplitude value corresponding to the acquired amplitude information, if the movable amplitude is in a movable area insufficient condition, correction of the driving command is performed and, on the other hand, if the movable amplitude is not in the movable area insufficient condition, correction of the driving command is released.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: December 16, 2014
    Assignee: Sinfonia Technology Co., Ltd.
    Inventors: Hideaki Moriya, Takenori Motoori, Takeo Ito
  • Publication number: 20140340003
    Abstract: Linear compressor comprising a resonant linear motor (4) having a stator (9) and a linear displacer (3), the linear motor (4) cooperating with a resonant spring (2) that is driven by the linear displacer (3) at one of the ends of the resonant spring (2) with the opposite end of the resonant spring (2) cooperating with a mechanical actuation element (1). A variation sensor of magnetic flux (5) cooperates with the resonant spring (2). Said variation sensor of magnetic flux (5) comprising a fixed part (7) and a movable part (6), the movable part (6) coupled to the end of the resonant spring (2) opposite to the end cooperating with the linear displacer (3). The variation sensor of magnetic flux (5) is the sole means required to determine the displacement amplitude and the frequency of oscillation of the displacer (3) of the linear motor (4). Corresponding method for controlling the stroke in such a linear compressor.
    Type: Application
    Filed: August 10, 2012
    Publication date: November 20, 2014
    Applicant: WHIRLPOOL S.A.
    Inventors: Douglas Pereira da Silvia, Paulo Sérgio Dainez, Renê Adriano Weise
  • Patent number: 8872448
    Abstract: An apparatus including at least one vibrator motor for vibrating the apparatus; a controller connected to the at least one vibrator motor; and at least one sensor connected to the controller. The at least one sensor is configured to sense drop motion of the apparatus. The controller is configured to control the at least one vibrator motor to change orientation of the apparatus during a portion of the drop motion.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: October 28, 2014
    Assignee: Nokia Corporation
    Inventors: Sergey Boldyrev, Mikko Uusitalo, Alexander V. Ptchelintsev, Jari-Jukka H. Kaaja, Ian Oliver
  • Publication number: 20140306625
    Abstract: The present invention provides a driving circuit for a vibration motor and a driving method for the vibration motor. The driving circuit comprises: a detecting unit, coupled to the vibration motor, for detecting rotating position and rotating speed of the vibration motor and accordingly generating a detecting result; and a control unit, coupled to the detecting unit and the vibration motor, for controlling acceleration and deceleration of the vibration motor according to the detecting result. The driving method comprises: providing a detecting unit for detecting rotating position and rotating speed of the vibration motor and accordingly generating a detecting result; and providing a control unit for controlling acceleration and deceleration of the vibration motor according to the detecting result.
    Type: Application
    Filed: May 7, 2013
    Publication date: October 16, 2014
    Applicant: Silicon Touch Technology Inc.
    Inventors: Chi-Yuan Chin, Yu-Chun Chuang
  • Patent number: 8860337
    Abstract: The current application is directed to various types of linear vibrational modules, including linear-resonant vibration modules, that can be incorporated in a wide variety of appliances, devices, and systems to provide vibrational forces. The vibrational forces are produced by linear oscillation of a weight or member, in turn produced by rapidly alternating the polarity of one or more driving electromagnets. Feedback control is used to maintain the vibrational frequency of linear-resonant vibration module at or near the resonant frequency for the linear-resonant vibration module. Both linear vibration modules and linear-resonant vibration modules can be designed to produce vibrational amplitude/frequency combinations throughout a large region of amplitude/frequency space.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: October 14, 2014
    Assignee: Resonant Systems, Inc.
    Inventors: Robin Elenga, Brian Marc Pepin, Glen Tompkins
  • Patent number: 8861059
    Abstract: A method and apparatus of driving a motor in a light scanning arrangement. The method includes the following steps: (1) driving a drive coil with a drive signal to oscillate a scan mirror and a light beam reflected from the scan mirror; (2) generating a feedback signal having zero crossings during oscillation of the scan mirror by a feedback coil in proximity to the drive coil; (3) integrating the feedback signal to generate an integrated feedback signal; and (4) processing the integrated feedback signal to generate a periodic drive signal that has the same time period as the feedback signal.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: October 14, 2014
    Assignee: Symbol Technologies, Inc.
    Inventors: James Giebel, Peter Fazekas
  • Patent number: 8841869
    Abstract: In summary, the present invention relates to a device, a method and a computer program enabling a rotating and translating movement by means of a single motor. An electric motor (102) for linear and rotary movement can comprise a stator (104) having a multi-phase coil arrangement including a number of coils or coil sets and a rotor (106) being movable along a direction of its rotational axis and having a number of poles respectively comprising at least one permanent magnet. A control unit (108) may determine currents based on at least the number of coils or coil sets, an angle of rotation of the rotor and a parameter depending on an axial position of the rotor, and supply the determined currents to the coils or coil sets.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: September 23, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: Georgo Zorz Angelis, Hendrikus Martinus Wilhelmus Goossens
  • Patent number: 8749112
    Abstract: The motion of the magnetized movable masses of a bilinear electrodynamic motor comprising two movable masses moving in opposite senses parallel to the axis (x-x) of the motor is balanced. At least one first magnetic sensor and at least one second magnetic sensor are provided which are able to deliver respectively a first electrical signal (s1(t)) and a second electrical signal (s2(t)) respectively representative of the motion of a first and of a second movable mass. An error signal (?s(t)) equal to the difference between the said first (s1(t)) and second (s2(t)) electrical signals is recorded. A harmonic analysis of the error signal performed. A sinusoidal excitation signal (e1(t)) at a given frequency f0 is applied to the first movable mass.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: June 10, 2014
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Jonathan Buquet, Gérald Aigouy, Thierry Trollier
  • Patent number: 8742714
    Abstract: In order to track the position of a component driven by an electric motor, wherein rotational movements of the electric motor are detected and used for a position count, deviations from an anticipated position count are determined and added to the position given by the position count as an uncertainty region.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: June 3, 2014
    Assignee: Continental Automotive GmbH
    Inventors: Stefan Holzmann, Roman Morawek, Alexandre Pozzer
  • Patent number: 8736202
    Abstract: In a drive control circuit of a linear vibration motor, the drive signal generating unit generates a drive signal whose phase is opposite to that of the drive signal generated during the motor running, after the running of the linear vibration motor has terminated; this drive signal of opposite phase includes a high impedance period during which the driver unit is controlled to a high impedance state. An induced voltage detector detects an induced voltage occurring in the coil. A comparator has a function as a hysteresis comparator in which the output level does not vary in a predetermined dead band, and the comparator outputs a high-level signal or a low-level signal during the high impedance period. When an in-phase signal is consecutively outputted from the comparator during the consecutive high-impedance periods, the drive signal generating unit determines that the linear vibration motor has come to a stop.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: May 27, 2014
    Assignee: Semiconductor Components Industries, LLC
    Inventor: Tsutomu Murata
  • Patent number: 8736201
    Abstract: In a drive control circuit of a linear vibration motor, a drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil. A driver unit generates a drive current in response to the drive signal generated by the drive signal generating unit and supplies the drive current to the coil. An induced voltage detector detects an induced voltage occurring in the coil. After a running of the linear vibration motor has terminated, the drive signal generating unit generates a drive signal whose phase is opposite to that of the drive signal generated during the motor running; this drive signal of opposite phase includes a high impedance period during which the driver unit is controlled to a high impedance state. The induced voltage detector detects the induced voltage occurring in the coil during the high impedance period.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: May 27, 2014
    Assignee: Semiconductor Components Industries, LLC
    Inventor: Tsutomu Murata
  • Publication number: 20140132186
    Abstract: A system is provided for controlling the amplitude of a vibrating resonant sensor through a drive signal applied to the resonator. The system comprises a controller that provides the drive signal to a forcer coupled to the resonator to excite the resonator into vibration at its resonant frequency. The system further comprises a buffer having an input node that receives charge of a pickoff capacitor of the resonator that is a measure of the resonator vibration and a current reference waveform. The buffer provides an output that is a difference signal that represents an error of the resonator vibration that corresponds to a difference between the measured resonator vibration and the current reference waveform, wherein the controller adjusts the drive signal in order to null the difference signal.
    Type: Application
    Filed: November 14, 2012
    Publication date: May 15, 2014
    Inventor: DANIEL A. TAZARTES
  • Publication number: 20140132187
    Abstract: A metal elastic member to be used for beams 4 for supporting a movable unit 3 at respective ends with respect to a fixed unit 2 in a miniature machine including at least one movable unit 3, the fixed unit 2 and the beams 4, and capable of swinging the movable unit about an axis P with the beams 4 serving as torsional rotation axes, includes a metal bar 4a having a predetermined length, a fixed unit pad 4b that is provided at a first end of the metal bar 4a and is fixed to the fixed unit 2, and a movable unit pad 4c formed on the other end side of the metal bar 4a and fixed to the movable unit 3. At least the metal bar 4a is molded to have a sectional area of 1 mm2 or less by using a physical or chemical processing method excluding a mechanical processing method and swings the movable unit 3 within a frequency of 150 Hz to 500 Hz.
    Type: Application
    Filed: October 21, 2013
    Publication date: May 15, 2014
    Applicant: HOKUYO AUTOMATIC CO., LTD.
    Inventors: Toshihiro Mori, Norihiro Asada, Kazuo Takai
  • Patent number: 8698431
    Abstract: A drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil. A driver unit generates the drive current in response to the drive signal generated by the drive signal generating unit and supplies the drive current to the coil. After the drive termination of a linear vibration motor, the drive signal generating unit generates a drive signal whose phase is opposite to the phase of the drive signal generated during the motor running. The driver unit quickens the stop of the linear vibration motor by supplying to the coil the drive current of opposite phase according to the drive signal of opposite phase.
    Type: Grant
    Filed: January 24, 2011
    Date of Patent: April 15, 2014
    Assignee: Semiconductor Components Industries, LLC
    Inventor: Tsutomu Murata
  • Patent number: 8674635
    Abstract: A noise reduction device for a starter includes a positive electrode connected to a power supply line via a branch wire, a grounding electrode connected to ground via a motor body of a motor, two capacitors connected in parallel with each other between the positive electrode and the grounding electrode, and a resin package into which the positive electrode and the grounding electrode are inserted and fixed. The package holds the two capacitors. The two capacitors include a capacitor body and two lead terminals extracted from the capacitor body in the same direction with respect to the capacitor body. The two capacitors are arranged in such a direction that the lead terminals of one thereof face the lead terminals of the other thereof across the positive electrode and the grounding electrode. The two lead terminals are joined to the positive electrode and the grounding electrode by welding.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: March 18, 2014
    Assignee: Denso Corporation
    Inventor: Yoichi Shoji
  • Patent number: 8659245
    Abstract: An active vibration control apparatus includes a linear actuator and a controller. The linear actuator includes a moving element, a stator and an elastic support. The stator has a plurality of coils surrounding the moving element. The elastic support supports the moving element to be reciprocally movable relative to the stator in an axial direction of the moving element due to elastic deformation of the elastic support. The controller is configured to apply an alternating current to the stator to generate vibration due to relative displacement of the moving element and the stator in the axial direction. The controller is configured to correct a center position of an amplitude of the vibration by additionally applying a predetermined direct current as a biased current to the stator when the linear actuator satisfies a predetermined vibration condition.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: February 25, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yasunori Kobayashi, Toshio Inoue
  • Patent number: 8653765
    Abstract: In a method and module for controlling rotation of a motorized spindle driven by a driving unit, a sensing unit senses vibration of the spindle and generates a voltage signal corresponding to the vibration of the spindle. A processing unit receives the voltage signal from the sensing unit, generates an adjusting ratio equal to a reference voltage corresponding to a predetermined vibration level of the spindle by the voltage signal upon detecting that the voltage signal is greater than the reference voltage and is less than a predetermined threshold voltage that is greater than the reference voltage, and outputs a control signal corresponding to the adjusting ratio to the driving unit such that the driving unit reduces a rotation speed of the spindle by the adjusting ratio in response to the control signal from the processing unit.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: February 18, 2014
    Assignees: Buffalo Machinery Co., Ltd, The Department of Electrical Engineering National Chang-Hua University of Education
    Inventors: Paul Chang, Tsair-Rong Chen, Jeen-Sheen Row, Chin-Sheng Lu
  • Patent number: 8606376
    Abstract: A method of actuating a system comprising a movable component and an actuator configured to move the movable component comprises providing a control signal representative of a desired motion of the movable component. The control signal is supplied to one or more resonators. Each of the one or more resonators has a mode of oscillation representative of at least one elastic mode of oscillation of the system. The control signal is modified by subtracting from the control signal a signal representative of a response of the one or more resonators to the control signal. The actuator is operated in accordance with the modified control signal. Thus, undesirable elastic oscillations of the system which might occur if the system were operated with the original control system can be reduced.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: December 10, 2013
    Assignees: Mitutoyo Corporation, Bundesrepublik Deutschland, Endvertreten Durch den Präsidenten der Physikalisch-Technischen Bundesanstalt
    Inventors: Hartmut Illers, Kazuhiko Hidaka, Akinori Saito, Hans-Ulrich Danzebrink
  • Patent number: 8581529
    Abstract: A vibration motor driving apparatus using a serial interface comprises a serial interface part for receiving an effect command (effect digital data or effect generating command digital data) from a main processor upon occurrence of an event, a unit for generating a clock when the effect command is received from the serial interface unit, a vibration motor driving signal generating unit including an effect data generating part for outputting effect data having a resonance frequency of a vibration motor on the basis of the effect command received from the serial interface unit and the clock received from the clock generating unit, and a D/A converting part for converting the effect data into a vibration motor driving signal, and the vibration motor which vibrates in accordance with the vibration motor driving signal to generate a haptic rhythm.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: November 12, 2013
    Assignee: Imagis Technology Limited Company
    Inventors: Jeong Cheol Kim, Kwang Su Han
  • Publication number: 20130285578
    Abstract: An amplitude control unit (40) detects the amplitude of a movable element (12) that reciprocates relative to a stator (11), detects fluctuations in a load over time according to detected fluctuations over time in the amplitude, and detects an abnormality on the basis of the detected fluctuations over time in the load. The amplitude control unit (40) outputs the detected amplitudes to a control output unit (50). The control output unit (50) controls a drive current (Id) for reciprocating the movable element (12) on the basis of the amplitude information supplied from the amplitude control unit (40).
    Type: Application
    Filed: January 19, 2012
    Publication date: October 31, 2013
    Applicant: PANASONIC CORPORATION
    Inventors: Yasuo Ibuki, Takafumi Ohba, Kazunori Watanabe
  • Publication number: 20130234628
    Abstract: The electromagnetic vibration exciter system with an adjustable electro-viscoelastic suspension device comprises an electromagnetic vibration exciter, a power amplifier and an adjustable electro-viscoelastic suspension device, which acts as the suspension device of the electromagnetic vibration exciter. The adjustable electro-viscoelastic suspension device contains a displacement sensor detecting the displacement of the moving component, a first adjustable amplifier and a second adjustable amplifier, a differentiator, an adjustable phase shifter, an adder and a proportioner. The linearity of the stiffness and damping of the exciter system is excellent, which can be adjusted as need through the adjustment of gain of the adjustable amplifier, the proportioner, the adjustable phase shifter. This invention has adjustable and linear parameters and it is also easy to be realized.
    Type: Application
    Filed: May 3, 2012
    Publication date: September 12, 2013
    Applicants: NATIONAL INSTITUTE OF METROLOGY , P.R. CHINA, ZHEJIANG UNIVERSITY
    Inventors: Wen He, Chunyu Wang, Runjie Shen, Shushi Jia, Mei Yu, Mingde Ma
  • Patent number: 8531139
    Abstract: In a drive control circuit of a linear vibration motor, a differential amplifier circuit includes an operational amplifier in which an P-channel type transistor is used as a transistor that receives an input voltage, and the differential amplifier circuit detects an induced voltage occurring in a coil. Before the H-bridge circuit is controlled to a high impedance state, a drive signal generating unit turns on a first transistor and a second transistor, and delivers a regenerative current through the coil, the first transistor, the second transistor and the power supply potential.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: September 10, 2013
    Assignee: On Semiconductor Trading, Ltd.
    Inventor: Tsutomu Murata
  • Patent number: 8519645
    Abstract: A drive signal generating unit generates a drive signal used to alternately deliver a positive current and a negative current to a coil. The drive signal is such that nonconducting periods are set before and after a positive current conducting period and the nonconducting periods are set before and after a negative current conducting period. A driver unit generates the drive current in response to the drive signal generated by the drive signal generating unit and then supplies the drive current to the coil. The drive signal generating unit sets the width of a nonconducting period such that, after the drive start of the linear vibration motor, the width of a nonconducting period to be set before at least the first conducting period of the drive signal is shorter than the width of a nonconducting period to be set before each conducting period during steady operation of the linear vibration motor.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: August 27, 2013
    Assignee: Semiconductor Components Industries, LLC
    Inventor: Tsutomu Murata
  • Patent number: 8513906
    Abstract: A hybrid controller for a mechanical system includes an actuator configured to position a load. A vibration attenuation controller produces a vibration attenuation control signal in response to an input signal for the mechanical system. A tracking controller configured produces a tracking control signal in response to the input signal. In response to an output signal from the mechanical system, either the vibration attenuation control signal or the tracking control signal is switched as a control signal for the mechanical system to reduce both vibration in the mechanical system and improve tracking the load.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: August 20, 2013
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Vijay Shilpiekandula, Scott A. Bortoff
  • Publication number: 20130207575
    Abstract: A magnetic actuator system which includes a case (10) and a spindle (22) which extends through the case comprising a magnetizable material such as iron. The actuator further includes a pair of permanent magnet assemblies (14, 16) positioned fixedly within the casing with a longitudinal space there between, wherein the permanent magnet assemblies comprise an alternating plurality of north pole/south magnet sections (18) which extend longitudinally or circumferentially of the actuator. The actuator further includes a coil winding (24) which surrounds the spindle, positioned between the two permanent magnet assemblies. Magnetic pole assemblies (28, 30) attached to the spindle are positioned within the volume encompassed by the permanent magnet assemblies, such that an alternating drive signal produces an oscillating action of the spindle of desired frequency and amplitude.
    Type: Application
    Filed: September 19, 2011
    Publication date: August 15, 2013
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Pieter Johannes Bax, Johannes Hotze Bernhard De Vries, Jurriaan Bernhard Rudolf Leveling, Gert Westrup, Sepas Setayesh, Folkert Vrijburg
  • Patent number: 8466637
    Abstract: A method, computer readable medium, and apparatus for controlling a moveable element includes generating and providing with a control device one or more driving signals to one or more positioning actuators to move the moveable element towards a target position based on a target travel distance and a calibration value. The control device determines when a post-movement position of the moveable element is outside of a tolerance range of the target position. The control device recalibrates the calibration value when the post-movement position is determined to be outside of the tolerance range. The control device repeats the generating, the determining, and the recalibrating as open loop steps until the post-movement position is within the tolerance range or until a limit, if any, on attempts is reached.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: June 18, 2013
    Assignee: New Scale Technologies, Inc.
    Inventors: Thomas Guidarelli, David A. Henderson
  • Patent number: 8461969
    Abstract: A dual mode vibrator is disclosed. There are available two vibrating units to enable obtainment of a variety of vibrations. Each lateral portion of the first and second vibrating units respectively supported by the first and second elastic members is supported by the first and second support bars secured at the housing for rotatable installation. Therefore, although the first and second vibrating units may rotate about the first and second support bars, the first and second vibrating units are not allowed to deviated or disengaged from the first and second support bars, whereby the plastic deformation of the first and second elastic members is prevented, and the first and second vibrating units can be positioned at predetermined positions at all times to enhance reliability of product.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: June 11, 2013
    Assignee: LG Innotek Co., Ltd.
    Inventor: Sunghwan An
  • Patent number: 8446112
    Abstract: The instant invention provides a magnetically controlled reciprocating engine having a unique electromagnet control system. The engine is constructed and arranged to operate from a stored power source such as batteries to provide extended run times by controlling the power supplied to the electromagnets in a manner that controls heat generation within the electromagnetic coils, thereby increasing coil life. The control system is also capable of controlling engine speed and/or torque outputs to make the engine versatile for a wide variety of uses. The system is constructed and arranged to be utilized on new or pre-existing engines of various configurations and may be utilized in other industries or devices that benefit from the use of electromagnets.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: May 21, 2013
    Assignee: Magnetic Miles, LLC
    Inventors: Stephen Miles, Michael Cristoforo
  • Publication number: 20130106319
    Abstract: A linear actuator driving device is provided. The linear actuator driving device includes an electromagnetic driving unit which makes a moving element reciprocate in response to a driving command and an offset correcting unit which corrects the driving command to carry out offset energization to make the center of reciprocation of the moving element be moved in the direction in which deviation between the center of reciprocation of the moving element and the center of the movement possible range is eliminated. The offset correcting unit is configured such that the amplitude information is acquired and, with respect to the amplitude value corresponding to the acquired amplitude information, if the movable amplitude is in a movable area insufficient condition, correction of the driving command is performed and, on the other hand, if the movable amplitude is not in the movable area insufficient condition, correction of the driving command is released.
    Type: Application
    Filed: July 1, 2011
    Publication date: May 2, 2013
    Applicant: SINFONIA TECHNOLOGY CO., LTD.
    Inventors: Hideaki Moriya, Takenori Motoori, Takeo Ito
  • Patent number: 8384316
    Abstract: The present invention relates to synchronized vibration devices that can provide haptic feedback to a user. A wide variety of actuator types may be employed to provide synchronized vibration, including linear actuators, rotary actuators, rotating eccentric mass actuators, and rocking mass actuators. A controller may send signals to one or more driver circuits for directing operation of the actuators. The controller may provide direction and amplitude control, vibration control, and frequency control to direct the haptic experience. Parameters such as frequency, phase, amplitude, duration, and direction can be programmed or input as different patterns suitable for use in gaming, virtual reality and real-world situations.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: February 26, 2013
    Assignee: Coactive Drive Corporation
    Inventors: John Houston, Nathan Delson
  • Patent number: 8378598
    Abstract: In a polyphase electric motor, a voltage is sequentially applied to a plurality of windings on a phase-by-phase basis. Then, there is sensed a rotational speed of a rotor, which is rotated by a rotating magnetic field that is generated by sequentially flowing an electric current in the windings on the phase-by-phase basis upon the sequential application of the voltage to the windings. Then, an oscillation frequency of a periodic oscillation, which is generated in the motor at the sensed rotational speed of the rotor, is obtained. Thereafter, it is determined whether the obtained oscillation frequency is a predetermined resonance frequency. Next, the voltage to be applied to the windings is corrected in a manner that reduces a resonance generated in the motor when a result of the determination indicates that the obtained oscillation frequency is the predetermined resonance frequency.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: February 19, 2013
    Assignee: ASMO Co., Ltd.
    Inventor: Youichi Kaneko
  • Publication number: 20130015788
    Abstract: An adaptive system for a personal care appliance, such as a power toothbrush, having a workpiece which is driven through an amplitude of motion by a drive mechanism which includes a stator member includes a circuit (13) for measuring average electrical current through the stator member and stored information (19) in the personal care appliance which relates the average current values through the stator during operation of the device to corresponding amplitude of motion of the workpiece. A processor (17) utilizing a stored program adjusts the operating frequency to produce a stator current value which correlates to the desired amplitude of motion of the workpiece.
    Type: Application
    Filed: September 25, 2012
    Publication date: January 17, 2013
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: KEVIN A. MILLER, ARI LUMBANTOBING, MEINDERT LAMBERTUS NORG
  • Patent number: 8314582
    Abstract: Disclosed herein is a method of controlling a motor in an image reading apparatus. It may be possible to optimize the drive current of the motor for driving the movement of the scanning module by using information associated with, for example, the time it takes for the scanning module to return to a home or rest position after the scanning module is moved from the home position to a predetermined position. Such optimized drive current can result in improvements in the reading performance of an image by the image reading apparatus and reduction of power consumption.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: November 20, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Ji Young Byun
  • Publication number: 20120250125
    Abstract: Methods and apparatus include improving print quality of a bi-directionally scanning electrophotographic (EP) device, such as a laser printer or copy machine, according to ambient pressure in which operated. A moving galvanometer or oscillator reflects a laser beam to create scan lines of a latent image in opposite directions. A damping of the motion occurs per air density implicated by temperature and pressure, where the pressure changes occurring especially from altitude changes. During use, a drive signal, such as a pulse train, moves the galvanometer or oscillator at or near its resonant frequency. Based on a parameter of the drive signal, such as pulse width, the ambient pressure can be made known. In general, a high-pressure environment requires a relatively longer pulse width to resonate the galvanometer or oscillator in comparison to a shorter pulse width for a low-pressure environment. Corrections to print quality stem from the determined ambient pressure.
    Type: Application
    Filed: June 18, 2012
    Publication date: October 4, 2012
    Inventors: Daniel R. Klemer, Craig P. Bush, Martin C. Klement, David J. Mickan, Wilson M. Routt, JR., Eric W. Westerfield
  • Patent number: 8222841
    Abstract: A method of controlling a moving part of a voice coil motor to move from an first position to a second position, wherein the position of the moving part is controlled by the level of an electrical signal applied to a coil of the voice coil motor, a first level of the electrical signal corresponding to the first position, and a second level of the electrical signal corresponding to the second position, the method including: at a first time, changing the electrical signal from the first level to an intermediate level, the intermediate level being chosen such that a peak overshoot of the moving part corresponds to the second position; and at a second time calculated to correspond to a delay of half an oscillation period of the moving part after the first time, changing the electrical signal to the second level.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: July 17, 2012
    Assignee: STMicroelectronics (Grenoble) SAS
    Inventor: Tarek Lule
  • Patent number: 8203290
    Abstract: This vibrating element includes a movable portion driven to vibrate at a prescribed resonance frequency, a driving portion vibrating the movable portion by cyclically supplying a pulse signal and a detecting portion detecting the vibrational state of the movable portion, while the driving portion is so formed as to supply the pulse signal at a first frequency substantially identical to the resonance frequency of the movable portion at least in starting and to cyclically supply the pulse signal at a second frequency smaller than the first frequency in detection of the vibrational state of the movable portion.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: June 19, 2012
    Assignee: Funai Electric Co., Ltd.
    Inventors: Hiroki Matsubara, Seiji Takemoto, Tomohisa Hirai, Manabu Murayama
  • Patent number: 8196473
    Abstract: In a device and method for non-destructive materials testing with at least one ultrasonic transducer, the transducer is able to be moved by a movement system in at least one direction to a workpiece surface. The emission of ultrasonic by the ultrasonic transducer is able to be synchronized with the activation of the movement system so that electrical interference caused by the movement system occurs at times at which no echo is expected for ultrasonic emitted by the transducer. The method and device can be applied to non-destructive materials testing with ultrasound.
    Type: Grant
    Filed: March 19, 2009
    Date of Patent: June 12, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stefan Hain, Hubert Mooshofer
  • Publication number: 20120133308
    Abstract: The current application is directed to various types of linear vibrational modules, including linear-resonant vibration modules, that can be incorporated in a wide variety of appliances, devices, and systems to provide vibrational forces. The vibrational forces are produced by linear oscillation of a weight or member, in turn produced by rapidly alternating the polarity of one or more driving electromagnets. Feedback control is used to maintain the vibrational frequency of linear-resonant vibration module at or near the resonant frequency for the linear-resonant vibration module. Both linear vibration modules and linear-resonant vibration modules can be designed to produce vibrational amplitude/frequency combinations throughout a large region of amplitude/frequency space.
    Type: Application
    Filed: January 6, 2012
    Publication date: May 31, 2012
    Inventors: Robin Elenga, Brian Marc Pepin, Glen Tompkins
  • Patent number: 8188690
    Abstract: The instant invention provides a magnetically controlled reciprocating engine having a unique electromagnet control system. The engine is constructed and arranged to operate from a stored power source such as batteries to provide extended run times by controlling the power supplied to the electromagnets in a manner that controls heat generation within the electromagnetic coils, thereby increasing coil life. The control system is also capable of controlling engine speed and/or torque outputs to make the engine versatile for a wide variety of uses. The system is constructed and arranged to be utilized on new or pre-existing engines of various configurations and may be utilized in other industries or devices that benefit from the use of electromagnets.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: May 29, 2012
    Assignee: Magnetic Miles, LLC
    Inventors: Stephen Miles, Michael Cristoforo