Linear Movement Motors Patents (Class 318/687)
  • Patent number: 11999499
    Abstract: There are described methods and systems for controlling an aircraft. The system comprises a power plant controller configured for controlling operation of an engine and a propeller coupled to the engine, a power throttle having at least one throttle lever to regulate output power of the engine and thrust produced by the propeller, and an autothrottle controller operatively connected to the power plant controller and to the power throttle and configured to modulate engine power without pilot input by causing a change to at least one setting of the power throttle.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: June 4, 2024
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Carmine Lisio, Kenneth Matheson
  • Patent number: 11885674
    Abstract: A phototransistor apparatus and a method of operating the phototransistor apparatus. The phototransistor apparatus can include a phototransistor, a light source, and a supply voltage associated with the phototransistor. After switching on the supply voltage, the phototransistor can generate a phototransistor signal that is scanned, wherein the supply voltage associated with the phototransistor is switched on later than the light source, and wherein charge carriers in a base area of the phototransistor are reactive to a light pulse from the light source in a currentless state, and continue to react after the light source is switched off. Alternatively, the power supply of the phototransistor can be switched on before the light source is switched off. By delaying the switching on of the power supply of the phototransistor compared to the switching on of the light source, a significant current saving can be achieved.
    Type: Grant
    Filed: March 30, 2021
    Date of Patent: January 30, 2024
    Assignee: Honeywell International Inc.
    Inventors: Claas Gerdes, Ralf Heinrich Schroder genannt Berghegger, August Wallmeyer
  • Patent number: 11638995
    Abstract: A robotic system for presenting a payload within a workspace includes a pair of serial robots configured to connect to the payload, a parallel robot coupled to a distal end of one of the serial robots such that the parallel robot is disposed between the distal end and the payload, a sensor situated within a kinematic chain extending between the distal end and the payload, and a robot control system (RCS). The sensor outputs a sensor signal indicative of a measured property of the payload. The RCS includes a coordinated motion controller configured to control the serial robots, and a corrective motion controller configured to control the parallel robot. Parallel robot control occurs in response to the sensor signal concurrently with control of the serial robots in order to thereby modify the property of the payload in real-time.
    Type: Grant
    Filed: July 6, 2021
    Date of Patent: May 2, 2023
    Assignee: GM Global Technology Operations LLC
    Inventors: Muhammad E. Abdallah, Miguel Arturo Saez, James W. Wells
  • Patent number: 11426866
    Abstract: A robot that includes a base that is provided with a flat installation surface member that is disposed on an installation target surface and a columnar member that extends upward from the installation surface member; and a first arm, one end of which is supported so as to be rotatable about a first horizontal axis located above the columnar member of the base and that has a motion range below the first horizontal axis. The columnar member has a length that is equal to or longer than the length of the first arm and has a uniform transverse sectional area that is the same as the first arm.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: August 30, 2022
    Assignee: FANUC CORPORATION
    Inventors: Kazutaka Nakayama, Kenichirou Abe, Masahiro Morioka
  • Patent number: 11413651
    Abstract: An imprint apparatus performs an imprint process of forming a pattern on a substrate by bringing a mold into contact with an imprint material on the substrate and curing the imprint material. The apparatus includes a substrate stage mechanism having a substrate chuck configured to hold the substrate, a mold driver configured to drive the mold, and a controller configured to control, based on tilt information indicating a tilt of the substrate chuck which is caused by a force received from the mold driver, the mold driver so as to adjust a relative tilt of the mold with respect to the substrate in the imprint process.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: August 16, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Yoshihiro Shiode
  • Patent number: 11371647
    Abstract: A method and an apparatus for isolating a vibration of a positioning device are provided. The apparatus includes a base plate for the positioning device, at least one active bearing element for bearing the base plate on/at a foundation and at least one evaluation and control device. The apparatus includes at least one means for determining a foundation movement-dependent quantity, wherein the active bearing element is controllable by the at least one control and evaluation device on the basis of the foundation movement-dependent quantity.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: June 28, 2022
    Assignee: Carl Zeiss Industrielle Messtechnik GmbH
    Inventor: Philipp Mayinger
  • Patent number: 11201533
    Abstract: A planar positioning device having three degrees of freedom (X, Y, Rz) includes a static base having a flat bearing surface and a moveable stage. The stage is moveable over the bearing surface in an XY-plane. The moveable stage includes air bearings and is supported without contact by the bearing surface via said air bearings. The device includes a linear motor acting in the X-direction and a linear motor acting in the Y-direction, and at least one additional linear motor acting in the X-direction or in the Y-direction. Each of the linear motors includes a magnet assembly arranged on the moveable stage and a coil assembly arranged on the base. The base includes a slider track extending in the X-direction and a slider track extending in the Y-direction. The sliders each have a reluctance actuator arranged on it to cooperate with (ferro)magnetic material on the moveable stage.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: December 14, 2021
    Assignee: C.C.M. Beheer B.V.
    Inventor: Arend-Jan Johan Beltman
  • Patent number: 11185985
    Abstract: A method for mobile robotic based inspection includes delivery of inspection requirements identifying a part and one or more inspection mode types. A three-dimensional model of the part and one or more physical attributes or specifications of the aeronautical part are received. A plurality of different motion sequences for the robot inspection system are determined to evaluate a plurality of predefined points on the component using one or more sensors for the one or more inspection types. Data acquisition parameters are determined for inspection sequence to allow for collection of inspection data for one or more inspection modes. A motion sequence from the plurality of different motion sequences is selected based on one or more parameters. An optimized inspection program configured to update operating parameters of the robot inspection system to perform the selected motion sequence and capture data using the one or more sensors is generated.
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: November 30, 2021
    Assignee: BELL HELICOPTER TEXTRON INC.
    Inventors: Jeffrey P. Nissen, Brian Cupples
  • Patent number: 11186302
    Abstract: An independent cart system with safety functions prevents unintended motion independently within different sections of the track while permitting motion along other sections of the track. A safety controller receives one or more input signals corresponding to operating conditions along the track. A safety program executing in the safety controller monitors the state of the input signals to determine whether a safety function is to be executed. When a safety program is executed, the safety controller transmits an output signal to one or more segment controllers present in one section along the track. Each segment controller is responsible for regulating current flow to the coils mounted to the corresponding track segment. In response to the signal from the safety controller, each segment controller in the section controls the power output to the coils along that section of track to achieve the safe operation desired in that segment.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: November 30, 2021
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Sawyer J. Desotelle, Patrick E. Ozimek, Mark R. Cooper, David D. Van Dorpe
  • Patent number: 11056984
    Abstract: An inverter control device that controls an inverter connected to a direct-current power supply and connected to an alternating-current rotating electrical machine to convert electric power between direct current and alternating current of a plurality of phases, the inverter control device including an electronic control unit that is configured to perform, in a state in which one switching element of a plurality of switching elements included in the inverter has a turn-off failure in which the switching element always goes into an off state, torque reduction control for reducing torque of the rotating electrical machine or deceleration control for outputting torque in a reverse direction from a rotation direction of the rotating electrical machine by performing switching control of the plurality of switching elements.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: July 6, 2021
    Assignee: AISIN AW CO., LTD.
    Inventors: Masashi Miyazaki, Subrata Saha, Isao Fujiwara, Yuki Sugiyama
  • Patent number: 10989186
    Abstract: The invention relates to a method for operating a piston pump (10) which is driven by means of a coil (1) of an electromagnet. A piston (2) of the piston pump (10) can be moved in a cylinder (3) for pumping purposes by means of the electromagnet. A voltage (U) is applied to the coil (1) during a switch-on period such that a current flows through the coil (1) and the piston (2) is accelerated, said voltage being applied by means of an actuation device (11). A time curve of an electric state variable (I, U) of the coil (1) is qualitatively detected, and the curve or a curve derived therefrom is analyzed in order to detect an impact of the piston (2) against a stop. The invention further relates to an actuation device and a piston pump.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: April 27, 2021
    Assignee: Robert Bosch GmbH
    Inventors: Andrea Krusch, Andreas Gutscher, Siamend Flo, Thorsten Allgeier, Walter Maeurer
  • Patent number: 10982668
    Abstract: Provided is a linear compressor capable of reducing noise and manufacturing cost. The linear compressor includes a piston reciprocating within a cylinder, a motor providing a driving force for movement of the piston, a sensing unit sensing a motor voltage and a motor current related to the motor, a discharge part installed at one end of the cylinder and adjusting discharge of a refrigerant compressed within the cylinder, and a controller detecting a load variation of the motor using at least one of the motor voltage and the motor current, calculating a compensation value related to a position of the piston each time a load variation of the motor is detected, and detecting an absolute position of the piston using the calculated compensation value.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: April 20, 2021
    Assignee: LG Electronics Inc.
    Inventors: Sungjin Lim, Gyunam Kim, Nayi Ryu
  • Patent number: 10786925
    Abstract: A sawing inspection system to measure dimensions of a cant that has been cut into pieces is disclosed. The system includes a housing having a window, an image sensor, a first mirror, and a second mirror. The first mirror includes a concave parabolic reflective surface and a focal point, and the second mirror includes a flat, reflective surface. The focal point is where parallel rays of light that enter the housing through the window and reflect off of the concave parabolic reflective surface intersect. The second mirror is positioned to reflect toward the focal point the parallel rays of light reflected by the first mirror. The image sensor is located at the focal point. At least one of the first mirror, the second mirror, and the image sensor is movable relative to the others to remove parallax error from the measurement of the pieces of the cant.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: September 29, 2020
    Assignee: OnSize Inc.
    Inventor: Earl M. Barker
  • Patent number: 10683857
    Abstract: A pump device, in particular for a brake system of a motor vehicle, includes two hydraulic chambers, a linear drive, and a pump piston. Each of the chambers has at least two fluid connections. The pump piston interacts with the chambers. The linear drive is embodied as a reluctance drive and includes a longitudinally movable armature, a housing-fastened stator that is configured to receive current, and at least one spring element. The at least one spring element is associated with the armature, and is configured to counteract a drive force of the reluctance drive. The armature is connected to the pump piston.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: June 16, 2020
    Assignee: Robert Bosch GmbH
    Inventors: Guenter Escher, Gerhard Stransky, Ben Ferguson, Dietmar Kratzer, Franz Mayer, Michael Specker, Stefan Achilles, Bernd Lutz, Alice Schacherl, Anton Paweletz, Hermann Bamberger, Roland Heller
  • Patent number: 10449959
    Abstract: A method and system for navigating an autonomous vehicle is disclosed. The method comprises determining a relative velocity between the autonomous vehicle and each of one or more surrounding vehicles. Thereafter, the relative velocity associated with each of the one or more surrounding vehicles may be compared with a predefined relative speed threshold to identify a plurality of vehicles-of-interest from the one or more surrounding vehicles. An area bounded by the plurality of vehicles-of-interest may then be determined as a current navigable space for the autonomous vehicle. Subsequently, a future navigable space for the autonomous vehicle may be predicted based on a predicted velocity of the plurality of vehicles-of-interest and a predicted distance to the plurality of vehicles-of-interest. The autonomous vehicle may then be navigated based on the current navigable space and the future navigable space.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: October 22, 2019
    Assignee: Wipro Limited
    Inventors: Shyam Sundar Pal, Balaji Sunil Kumar, Manas Sarkar
  • Patent number: 9966894
    Abstract: The invention discloses a real-time vibration state monitoring system. The system includes a linear motor, a signal generating module for driving the linear motor to vibrate, a working parameters feedback module, a calculating module, an initial position recording module, and a signal control module. The system can control the amplitude of the vibrator by monitoring the vibration state of the vibrator in the linear motor and adjusting the drive signal; therefore, the effect to normal working or reliability of the linear motor due to oversized amplitude can be avoided. A monitoring method is also provided.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: May 8, 2018
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventors: Huan Ge, Lijian Ye, Rongguan Zhou
  • Patent number: 9915260
    Abstract: A control method and a system for controlling the piston of a resonant linear compressor including at least one electronic control unit, the electronic control unit including at least one observing electronic circuit and at least one control circuit associated to each other. The observing electronic circuit is configured for: measuring at least one electric magnitude of the electric motor; estimating at least one set of electric parameters and at least one set of mechanical parameters of the resonant linear compressor; and estimating and providing at least one control parameter of the system for the control circuit based on the measured electric magnitude measured and on the estimated set of electric and mechanical parameters. The control circuit is configured for actuating the electric motor from the at least one control parameter.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: March 13, 2018
    Assignees: Whirlpool S.A., Fundacao Universidade do Estado de Santa Catarina-UDESC
    Inventors: Paulo Sergio Dainez, Jose de Oliveira, Ademir Nied
  • Patent number: 9890778
    Abstract: A method for operating a linear compressor includes measuring a current induced in a motor of the linear compressor and calculating an observed current of the motor of the linear compressor using at least an electrical dynamic model for the linear compressor and a robust integral of the sign of the error feedback. The method also includes detecting a head crash within the linear compressor if an error between the observed current of the motor of the linear compressor and the measured current induced in the motor of the linear compressor is greater than a crash threshold.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: February 13, 2018
    Assignee: Haier US Appliance Solutions, Inc.
    Inventors: Srujan Kusumba, Gregory William Hahn, Michael Lee McIntyre, Mohammad Taghi Mohebbi
  • Patent number: 9518578
    Abstract: A control method and a system for controlling the piston of a resonant linear compressor including at least one electronic control unit, the electronic control unit including at least one observing electronic circuit and at least one control circuit associated to each other. The observing electronic circuit is configured for: measuring at least one electric magnitude of the electric motor; estimating at least one set of electric parameters and at least one set of mechanical parameters of the resonant linear compressor; and estimating and providing at least one control parameter of the system for the control circuit based on the measured electric magnitude measured and on the estimated set of electric and mechanical parameters. The control circuit is configured for actuating the electric motor from the at least one control parameter.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: December 13, 2016
    Assignee: Whirlpool S.A.; Fundacao Universidade de Estado de Santa Catarina—UDESC
    Inventors: Paulo Sergio Dainez, José de Oliveira, Ademir Nied
  • Patent number: 9248533
    Abstract: In a production system general-purpose cell for general-purpose use in processing and transportation of a received workpiece in a production system of processing and delivering the workpiece, the production system general-purpose cell includes a base unit having a planar shape of quadrangle and supporting at least a robot for use in transportation of the workpiece such that the robot is movable on the planar area of quadrangle, a parts supply unit for supplying parts of the workpiece to the robot supported by the base unit, and a processing area extending outside the base unit. The robot supported by the base unit having a motion range set in a range from inside to outside the base unit in a form including at least part of the processing area.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: February 2, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Masatoshi Ono, Christoph Meyerhoff
  • Patent number: 9202719
    Abstract: Displacement devices comprise a stator and a moveable stage. The stator comprises a plurality of coils shaped to provide pluralities of generally linearly elongated coil traces in one or more layers. Layers of coils may overlap in the Z-direction. The moveable stage comprises a plurality of magnet arrays. Each magnet array may comprise a plurality of magnetization segments generally linearly elongated in a corresponding direction. Each magnetization segment has a magnetization direction generally orthogonal to the direction in which it is elongated and at least two of the magnetization directions are different from one another. One or more amplifiers may be connected to selectively drive current in the coil traces and to thereby effect relative movement between the stator and the moveable stage.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: December 1, 2015
    Assignee: The University of British Columbia
    Inventors: Xiaodong Lu, Irfan-Ur-Rab Usman
  • Patent number: 9195129
    Abstract: The substrate holding device of the present invention includes a holding unit that adsorbs and holds the substrate, a measuring section that measures a physical quantity relating to a adsorption force of the holding unit with the substrate mounted on the holding unit; and a control section that carries out a first determination based on a first condition and a measurement result obtained by the measuring section and a second determination based on a second condition that is different from the first condition and a measurement result obtained by the measuring section to select one of at least three preset operations based on the result of first and second determinations to thereby execute processing depending on the selected operation.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: November 24, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masatoshi Endo
  • Patent number: 9130486
    Abstract: Provided is a motor position detecting unit that includes a first computing element configured to output three-phase back-electromotive foreces (back-EMFs) based on a linear computation; a second computing element configured to output three-phase back-EMF based on a non-linear computation; and a computing controller configured to receive a control signal, three-phase voltage and current, and selecting any one of the first and second computing elements based on the received control signal, the received three-phase voltages and currents, wherein the control signal includes information on operation modes of an external motor.
    Type: Grant
    Filed: June 4, 2013
    Date of Patent: September 8, 2015
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jung Hee Suk, Jimin Oh, Minki Kim, Yil Suk Yang
  • Patent number: 9107984
    Abstract: A device (1) for assembly of a pharmaceutical application aid (51), particularly a pen, is proposed. The device (1) is characterized by a holding device (3) for fixation of a first housing sleeve (5) that accommodates a pharmaceutical container, particularly a carpule (23), and by a stop (43) for limiting a displacement of a second housing sleeve (35) relative to the first housing sleeve (5).
    Type: Grant
    Filed: November 4, 2008
    Date of Patent: August 18, 2015
    Assignee: Arzneimittel GmbH Apotheker Vetter & Co. Ravensburg
    Inventors: Guenter Kavallar, Hubert Goederle, Janosch Steib
  • Patent number: 9024548
    Abstract: In a linear motor used for a driving axis of a large-size machine tool having a very long driving stroke, pole position correction values at a plurality of stroke positions are stored in a memory. A pole position correction value corresponding to an actual stroke position of a slider is calculated based on the stored pole position correction value. A corrected electrical angle offset value derived based on the calculated pole position correction value is used to control the linear motor.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: May 5, 2015
    Assignee: OKUMA Corporation
    Inventors: Fumiki Yamaoka, Yoichi Kawai
  • Patent number: 9018887
    Abstract: An ultrasonic electro-mechanical resonant system and instrument that provides improvements in the design and implementation of a feedback system. The disclosed configuration and orientation of coils enhance the motional or velocity feedback signals while minimizing the effects of transformer coupling. A two coil and a three coil approach is disclosed that takes advantage of non-homogeneous magnetic fields. An asymmetrical arrangement enables velocity signals to be coupled into the coils without requiring additional signal conditioning or capacitive elements.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: April 28, 2015
    Assignee: Westdale Holdings, Inc.
    Inventor: Richard H. Paschke
  • Patent number: 9018864
    Abstract: A Rebound-Effector is a mechanism which runs a weight forth and back, by high acceleration. As the weight accelerates, a rebound force is built up. This force is proportional to the product of the weight and the acceleration, and is in opposite direction to the acceleration vector. The Rebound-Effector has four operational phases. The energy inserts into the system, during the first phase, accelerates the weight to the same direction as the movement, being converted into kinetic energy. This kinetic energy is taken back during the second phase, while slowing down the weight, and stored. During the third phase, the stored energy accelerates the weight to the same moving direction, being converted into kinetic energy. This kinetic energy is taken back during the fourth phase, while slowing down the weight, and stored.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: April 28, 2015
    Inventor: Hadar Magali
  • Patent number: 9000692
    Abstract: A linear electrodynamic-type motor, for compressing a fluid circulating in a cryocooler notably using a Stirling cycle, includes a translationally movable induction coil; a power-supply circuit adapted to deliver, to at least one induction coil, an AC power-supply current; a movable mass adopting a translational movement; an induction coil arranged so as to move a respective movable mass between a first position and a second position where the movable mass can compress the fluid; and a secondary circuit arranged to connect the terminals of at least one induction coil in short-circuit. The secondary circuit comprises a compensation component for producing a phase shift between the power-supply voltage and the power-supply current, so as to reduce the phase difference that the inductance of the induction coil produces.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: April 7, 2015
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Gerald Aigouy, James Butterworth, Benoit Debray, Jean Christophe Rey
  • Patent number: 8994315
    Abstract: The present invention provides a motor controller for controlling a DC motor according to a reference signal. The motor controller includes a compensator, a pulse width modulation unit, and a motor driving unit. The compensator generates a control signal according to the reference signal and a sensing signal from the DC motor. The pulse width modulation unit generates a motor control signal by comparing the control signal and a ramp signal having a varying frequency. The motor driving unit receives the motor control signal and drives the DC motor according to the motor control signal.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: March 31, 2015
    Assignee: Richtek Technology Corporation
    Inventors: Wei-Hsu Chang, Jo-Yu Wang, Jen-Hung Chi
  • Patent number: 8928258
    Abstract: A vibration control device and method, wherein the vibration control device includes a first driving unit for vibrating the vibration control device up and down, a second driving unit for moving the vibration control device left or right, and a control unit for controlling the first driving unit and the second driving unit, upon an occurrence of an event. The controller controls the second driving unit to move the vibration control device at a time when the first driving unit vibrates the vibration control device off of a surface.
    Type: Grant
    Filed: April 21, 2011
    Date of Patent: January 6, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young-joon Choi, Yeo-jun Yoon, Ka-won Cheon, Sung-bin Kuk, Dong-jin Eun
  • Patent number: 8926296
    Abstract: A linear compressor (100) applicable to a cooling system (20) includes a piston (1) driven by a linear motor (10), the piston (1) having displacement range controlled by means of a controlled voltage (VM), the controlled voltage (VM) having a voltage frequency (?P) applied to the linear motor (10) and adjusted by a processing unit (22), the range of piston (1) displacement being dynamically controlled in function of a variable demand of the cooling system (20), the linear compressor (100) having a resonance frequency, the processing unit (22) adjusting the range of piston (1) displacement, so that the linear compressor (100) will be dynamically kept on resonance throughout the variations in demand of the cooling system (20).
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: January 6, 2015
    Assignee: Whirlpool, S.A.
    Inventors: Paulo Sergio Dainez, Dietmar Erich Bernhard Lilie, Márcio Roberto Thiessen
  • 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
  • Patent number: 8872449
    Abstract: A distributed-arrangement linear motor in which stators are arranged in a distributed manner and a method of controlling the distributed-arrangement linear motor are provided. The linear motor 1 is a linear motor in which a stator and a movable member are relatively movable, wherein the stator and the movable member respectively have periodic structures in which plural kinds of poles of the stator and the movable member (12a, 12b, 12c) (22a, 22b, 22c) which magnetically act each other and arranged periodically subsequently in an order according to the arrangement in a direction of the relative motion therebetween; a plurality of stators are arranged in a distributed manner in the direction of the relative motion; a distance D1, D2 between adjacent stators is not more than a length Lmv of the movable member; the pole of the stator is formed of a coil 11; and a current control unit that controls current to be supplied to the coil based on the distance between the stators is provided.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: October 28, 2014
    Assignee: THK Co., Ltd.
    Inventors: Toshiro Tojo, Toshiyuki Aso, Yuki Nomura, Akihiro Unno
  • Patent number: 8860354
    Abstract: The control circuit of an electric motor, which has at least one phase supplied with high voltage and has a defined high-voltage zone, is provided with a control for the supply current of the phase with a setpoint-value current, and has devices for measuring the supply current which generate a first analog signal whose value corresponds to the measured current, an electronic control unit being disposed in a low-voltage zone, and having an analog-to-digital converter for converting the first analog signal or another analog signal acting as the first analog signal, into a corresponding digital signal which is supplied to the electronic control unit. The measuring devices are formed by a bleeder resistor, which is disposed in series with the phase, as well as by a differential amplifier whose two inputs, respectively, are connected to two contacts of the bleeder resistor.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: October 14, 2014
    Assignee: Etel S.A.
    Inventors: Didier Blanc, Ralph Coleman, Jean-Marc Vaucher, Claude Froidevaux
  • Patent number: 8810181
    Abstract: A control apparatus for controllably driving a drive mechanism which displaces a movable member, includes: an electric-current detecting unit configured to detect electric current for driving the drive mechanism; a speed control unit configured to set a target electric-current according to a drive speed at which the drive mechanism is caused to drive the movable member; and an electric-current control unit configured to multiply, by an integral gain and a proportional gain, an electric-current deviation between a target electric-current and a detection electric-current detected by the electric-current detecting unit to set output electric-current to be output to the drive mechanism, wherein the current control unit changes at least one of the integral gain and the proportional gain according to the drive speed of the drive mechanism.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: August 19, 2014
    Assignee: Mitutoyo Corporation
    Inventors: Tomohiro Usui, Yo Terashita
  • Patent number: 8803467
    Abstract: A partial arc servomotor assembly having a curvilinear U-channel with two parallel rare earth permanent magnet plates facing each other and a pivoted ironless three phase coil armature winding moves between the plates. An encoder read head is fixed to a mounting plate above the coil armature winding and a curvilinear encoder scale is curved to be co-axis with the curvilinear U-channel permanent magnet track formed by the permanent magnet plates. Driven by a set of miniaturized power electronics devices closely looped with a positioning feedback encoder, the angular position and velocity of the pivoted payload is programmable and precisely controlled.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: August 12, 2014
    Assignee: The Keyw Corporation
    Inventor: Xiuhong Sun
  • Publication number: 20140210396
    Abstract: A linear motor device includes a linear motor and a controller that applies pressure to a pressurizing target by moving a needle provided with the linear motor. The controller includes: a speed-change position-setting unit that calculates a deceleration start position, which is a position where a movement speed of the needle starts to be reduced from a first speed to a second speed when the pressurizing target start to be pressurized, based on a distance required to reduce the movement speed of the needle from the first speed to the second speed which is lower than the first speed and at which pressure applied to the pressurizing target when the needle comes into contact with the pressurizing target is equal to or lower than a predetermined pressure; and a position determination unit that drives the needle of the linear motor at the first speed and at the second speed.
    Type: Application
    Filed: September 6, 2012
    Publication date: July 31, 2014
    Applicant: THK CO., LTD.
    Inventors: Shuhei Yamanaka, Yuki Nomura
  • Patent number: 8716959
    Abstract: A linear motion control device for use in a linear control system is presented. The linear motion control device includes a coil driver to drive a coil that, when driven, effects a linear movement by a motion device having a magnet. The linear motion control device also includes a magnetic field sensor to detect a magnetic field associated with the linear movement and an interface to connect an output of the magnetic field sensor and an input of the coil driver to an external controller. The interface includes a feedback loop to relate the magnetic field sensor output signal to the coil driver input.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: May 6, 2014
    Assignee: Allegro Microsystems, LLC
    Inventors: Paul David, Shaun D. Milano
  • Patent number: 8708662
    Abstract: A linear compressor for adjusting a variable rate of a cooling capacity is provided. The linear compressor may include a fixed member having a compression space formed therein, a movable member linearly reciprocated in the fixed member to compress a refrigerant drawn into the compression space, one or more springs provided to elastically support the movable member in the motion direction of the movable member, a motor unit including a motor connected to the movable member to linearly reciprocate the movable member in the axial direction and a capacitor connected in series to the motor, and a motor control unit controlling an AC voltage applied to the motor to adjust a variable rate of a cooling capacity by the reciprocation of the movable member.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: April 29, 2014
    Assignee: LG Electronic Inc.
    Inventors: Jin Seok Hu, Shin Hyun Park, Young Geul Kim, Kyo Lyong Kang
  • Patent number: 8704478
    Abstract: A motor-drive circuit includes: a filter circuit to attenuate a frequency band including a resonance frequency of an actuator in a target-current signal, which is a digital signal indicating a target value of a driving current to be supplied to a voice-coil motor that drives the actuator; a digital-analog converter to convert an output signal of the filter circuit into an analog signal, to be outputted as a current-control signal; and a driving circuit to supply the driving current to the motor in accordance with the current-control signal, the filter circuit including: a digital-notch filter to attenuate a frequency band around the resonance frequency in the target-current signal; and a digital-low-pass filter to attenuate a frequency band greater than or equal to a predetermined frequency in the output signal of the digital-notch filter, the digital-low-pass filter having a sampling frequency higher than a sampling frequency of the digital-notch filter.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: April 22, 2014
    Assignee: Semiconductor Components Industries, LLC
    Inventor: Takeshi Arai
  • 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: 8686669
    Abstract: A method of controlling a linear motion system has a linear synchronous motor comprising a stator and at least two carrier units moveable in relation to the stator, the stator comprising a number of coil units, each of the at least two carrier units comprising a magnetic unit including an array of alternate-pole magnets having a regular magnet pole-pitch, wherein in order to form a train the at least two carrier units are arranged relative to each other so that the mutual distance between two identically poled magnets of two different magnetic units is an integer multiple of the magnet pole-pitch.
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: April 1, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Walrick Dirkx, Wilco Pancras
  • Patent number: 8569990
    Abstract: A block switch controller for a linear motor is disclosed, the linear motor having a plurality of motor blocks, a shuttle which is propelled by the magnetic forces generated by a motor current passing through the motor blocks, a plurality of motor block switches selectively passing the motor current through the motor blocks, and a plurality of position sensors determining the position of the shuttle relative to the motor blocks, wherein the controller comprises a closed loop vector controller that incorporates a delay state having a feedback gain.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: October 29, 2013
    Assignee: Electro Standards Laboratories
    Inventor: Raymond B Sepe, Jr.
  • Patent number: 8550789
    Abstract: The present invention discloses a linear compressor which makes it possible to precisely operate a voltage using a current without having a high-capacity capacitor connected in series to a motor.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: October 8, 2013
    Assignee: LG Electronics Inc.
    Inventors: Jin Seok Hu, Shin Hyun Park, Young Geul Kim, Kyo Lyong Kang
  • Patent number: 8547083
    Abstract: An apparatus (2;3;4;5) for determination of the axial position of the armature (11) of a linear motor comprises at least one pair of magnetically permeable, annular elements (12;20,21;30,31,34,35;40,41,44,45;48;50,51), which are arranged essentially coaxially and at a short distance (dr;db) from one another, such that an air gap (22;32,36;42,46) is formed between them, in which a magnetic field sensor (23;33,37;43,47;Si) for measurement of the magnetic field (B) in the air gap is arranged.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: October 1, 2013
    Assignee: NTI AG
    Inventor: Daniel Ausderau
  • Patent number: 8508177
    Abstract: A stepping motor drive device includes: a first pulse generation circuit that generates pulses at rising or falling edges of a first clock signal; a second pulse generation circuit that generates pulses at rising and falling edges of a second clock signal; a first mask circuit that outputs or masks the output of the first pulse generation circuit depending on whether the second clock signal is normal; a second mask circuit that outputs or masks the output of the second pulse generation circuit depending on whether the first clock signal is normal; a logic circuit that logically combines the outputs of the mask circuits; a step position control circuit that determines the step position of a motor according to the output of the logic circuit; and a motor drive section that supplies a current to the motor according to the output of the step position control circuit.
    Type: Grant
    Filed: January 4, 2011
    Date of Patent: August 13, 2013
    Assignee: Panasonic Corporation
    Inventor: Takehiro Yano
  • Publication number: 20130193901
    Abstract: In a linear motor used for a driving axis of a large-size machine tool having a very long driving stroke, pole position correction values at a plurality of stroke positions are stored in a memory. A pole position correction value corresponding to an actual stroke position of a slider is calculated based on the stored pole position correction value. A corrected electrical angle offset value derived based on the calculated pole position correction value is used to control the linear motor.
    Type: Application
    Filed: January 25, 2013
    Publication date: August 1, 2013
    Applicant: OKUMA CORPORATION
    Inventor: OKUMA Corporation
  • Patent number: 8494689
    Abstract: A method of controlling movement of an agent operating within an autonomous system includes determining, using a processing device associated with the agent, a highest attraction point for the agent on a line of optimal transmission between a detected event within an area of surveillance by the autonomous system and a base station within the autonomous system, and calculating an attraction force for the agent, based on the line of optimal transmission and location of the detected event; determining proximity of the agent to one or more additional agents operating within the autonomous system, and calculating a repulsion force for the agent so as to maintain a minimum separating distance between the agent and the one or more additional agents; calculating a resultant force for the agent based on the attraction force and the repulsion force; and changing a direction of the agent based on the resultant force.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: July 23, 2013
    Assignee: Raytheon Company
    Inventor: Geoffrey D. Ashton
  • Publication number: 20130181652
    Abstract: The control circuit of an electric motor, which has at least one phase supplied with high voltage and has a defined high-voltage zone, is provided with a control for the supply current of the phase with a setpoint-value current, and has devices for measuring the supply current which generate a first analog signal whose value corresponds to the measured current, an electronic control unit being disposed in a low-voltage zone, and having an analog-to-digital converter for converting the first analog signal or another analog signal acting as the first analog signal, into a corresponding digital signal which is supplied to the electronic control unit. The measuring devices are formed by a bleeder resistor, which is disposed in series with the phase, as well as by a differential amplifier whose two inputs, respectively, are connected to two contacts of the bleeder resistor.
    Type: Application
    Filed: July 26, 2011
    Publication date: July 18, 2013
    Inventors: Didier Blanc, Ralph Coleman, Jean-Marc Vaucher, Claude Froidevaux
  • Patent number: RE45388
    Abstract: A compact field programmable gate array (FPGA)-based digital motor controller (102), a method, and a design structure are provided. The compact FPGA-based digital motor controller (102) includes a sensor interface (206) configured to receive sensor data from one or more sensors (104) and generate conditioned sensor data. The one or more sensors (104) provide position information for a DC brushless motor (108). The compact FPGA-based digital motor controller (102) also includes a commutation control (210) configured to create switching commands to control commutation for the DC brushless motor (108). The commutation control (210) generates commutation pulses from the conditioned sensor data of the sensor interface (206). The compact FPGA-based digital motor controller (102) also includes a time inverter (208) configured to receive the commutation pulses.
    Type: Grant
    Filed: July 16, 2013
    Date of Patent: February 24, 2015
    Assignee: Hamilton Sundstrand Space Systems International, Inc.
    Inventors: Robert Wichowski, Harold J. Hansen, Kevin G. Hawes