Digital Or Numerical Systems Patents (Class 318/600)
  • Patent number: 10439538
    Abstract: A motor has a rotor that rotates in response to one or more alternating current input signals. A position sensor is adapted to generate a substantially saw-tooth waveform indicative of a position of the rotor. A primary processing module or data processor is capable of providing position data and speed data for the rotor based on the substantially saw-tooth waveform. A notch filter can reject one or more selected frequency components in the substantially saw-tooth waveform to reduce distortion off the substantially saw-tooth waveform that would otherwise tend to cause inaccuracy in the provided position data and speed data.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: October 8, 2019
    Assignee: DEERE & COMPANY
    Inventors: Dan Li, Jacob Pence, Long Wu
  • Patent number: 10409258
    Abstract: Various embodiments relate to compensating for a deviation in an operating point of a manipulator during the processing of a workpiece. A command sequence is processed for controlling the manipulator, and a piece of setpoint position information is generated. The operating point is set based on the setpoint position information. The setpoint position information is processed using a compensation parameter set for ascertaining a compensation value. The setpoint position information is adjusted according to the compensation value for compensating for a deviation between an actual position of the operating point and the setpoint position. The actual position is measured during the processing of the workpiece. A correction value is ascertained, based on a comparison between the measured actual position and the setpoint position. The compensation parameter set is adjusted during the processing of the workpiece for reducing the deviation based on the correction value.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: September 10, 2019
    Assignee: Broetje-Automation GmbH
    Inventor: Markus Stoyke
  • Patent number: 10289092
    Abstract: A computer-implemented method for performing stability analysis for a digital motor controller includes receiving a reference signal to be injected into a digital speed control loop and controlling, by a hardware description language (VHDL) component, the injection of the reference signal into the digital control loop through a field programmable gate array (FPGA) hardware interface. The method also includes providing the reference signal to the digital speed control loop to determine a performance of the digital motor controller and receiving a feedback signal, at the FPGA hardware interface, from the digital speed control loop based on the reference signal. The method includes comparing the reference signal to the feedback signal to evaluate the performance of the digital motor controller and exporting a result of the comparing by the FPGA hardware interface to indicate the performance of the digital motor controller.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: May 14, 2019
    Assignee: HAMILTON SUNDSTRAND SPACE SYSTEMS INTERNATIONAL INC.
    Inventors: Robert P. Wichowski, Kevin G. Hawes, Michael A. O'Toole
  • Patent number: 10232453
    Abstract: A system, apparatus and method for cutting battery grids or plates from a continuous strip of a plurality of connected battery grids. The continuous strip moves toward a rotating cutter with at least two cutter blades with cutting edges equally circumferentially spaced apart and extending parallel to the cutter axis of rotation and a rotating cooperating anvil. The cutting edges and the anvil are rotated at the same tangential speed to cut in a nip between them a plate or grid from the continuous strip of connected grids. At a point upstream of the cutter, an electric signal indicative of each lug of the grid of the continuous strip moving past this point is used to control the speed of movement of the strip through the nip to cut a plate or grid from the continuous strip at a longitudinal speed which is essentially the same as the tangential speed of the cutting edges.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: March 19, 2019
    Assignee: Wirtz Manufacturing Company, Inc.
    Inventors: Roel Mendoza, Dustin James Allen
  • Patent number: 10000001
    Abstract: The injection molding machine includes a fixed platen, a moveable platen moving forward and backward by a toggle link, a base plate supporting the toggle link, a driving part for mold clamping to operate the toggle link, a driving part for mold thickness adjustment to adjust a mold thickness, and a control unit to calculate a movement distance gap before a clamping process by controlling the driving part for mold thickness adjustment to move the base plate backward and then move the base plate forward to a target movement position based on a fold amount of the toggle link, and control the driving part for mold thickness adjustment using a value obtained by deducting the movement distance gap from the fold amount of the toggle link when producing a clamp force.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: June 19, 2018
    Assignee: LS MTRON LTD.
    Inventors: Sun-Woo Lee, Hyeon-Jae Yu
  • Patent number: 9992920
    Abstract: A method for accurate population of a circuit carrier (2) with at least one electronic component (1) which comprises at least two separately controllable light-emitting surfaces (3a, 3b, 3c), having the following steps: a) optically detecting current positions of the at least two light-emitting surfaces (3a, 3b, 3c) of the electronic component (1); b) calculating at least one current variable (Sist) characterizing the geometric location of the light-emitting surfaces (3a, 3b, 3c) according to the current positions of the at least two light-emitting surfaces (3a, 3b, 3c) of the electronic component (1); c) comparing the at least one current variable (Sist) to at least one target variable (Ssoll) for calculating at least one correction variable (k); d) populating the circuit carrier (2) with the at least one electronic component (1) according to the at least one correction variable (k).
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: June 5, 2018
    Assignee: ZKW GROUP GMBH
    Inventors: Jürgen Zorn, Dietmar Kieslinger
  • Patent number: 9914535
    Abstract: Technology for achieving the behavior and benefits of traditional cyclic control in one rotor may be implemented with a simple under-actuated passive mechanism. An air vehicle employing the disclosed technology maintains lifting thrust by regulating the average rotor speed and generates control moments through coordinated pulsing of the motor torque. Rapid pulsing of the motor torque induces oscillations in propeller angle of attack, and so causes “cyclic control” without requiring the traditional auxiliary actuators and linkages. The MAV propulsion system is capable of using a minimum number of actuators in dual roles of thrust and moment objectives.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: March 13, 2018
    Assignee: The Trustees of the University of Pennsylvania
    Inventor: James J. Paulos
  • Patent number: 9876567
    Abstract: Exemplary embodiments described herein include a bi-directional Free Space Optical (FSO) communication unit that may be used in a multi-node FSO communication system. The bi-directional FSO unit may include a co-boresighted optical unit such that received and transmitted beams are coincident through a common aperture. Embodiments described herein may be used to correct or accommodate the alignment errors of the received and transmitted beams.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: January 23, 2018
    Assignee: SA Photonics, Inc.
    Inventors: William C. Dickson, Andrew K. McClaren, Greg G. Mitchell
  • Patent number: 9716549
    Abstract: Exemplary embodiments described herein include a bi-directional Free Space Optical (FSO) communication unit that may be used in a multi-node FSO communication system. The bi-directional FSO unit may include a co-boresighted optical unit such that received and transmitted beams are coincident through a common aperture. Embodiments described herein may be used to correct or accommodate the alignment errors of the received and transmitted beams.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: July 25, 2017
    Assignee: SA Photonics, Inc.
    Inventors: William C. Dickson, Andrew K. McClaren, Greg G. Mitchell
  • Patent number: 9490091
    Abstract: A management device (1) of the causes of tripping in an electronic trip device enabling operation to take place in efficient and dependable manner by means of an architecture with three microcontrollers. The first microcontroller (3), second microcontroller (4) and third microcontroller (5), connected to one another, perform analysis and storage of characteristics typical to the electric power system (2) measured by the first microcontroller (3). Depending on the power supply situations and the analyzed events, one, two or three microcontrollers can be active to reduce the electric power requirements of the device (1). Storage of the data concerning the electric power system (2) is at least partially performed in redundant manner.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: November 8, 2016
    Assignee: SCHNEIDER ELECTRIC INDUSTRIES SAS
    Inventors: Bertrand Masseboeuf, Joel Sorin
  • Patent number: 9483037
    Abstract: A motor control device includes: a unit configured to generate a target rotation position information of a first driving motor based on target rotation position signals indicating a target rotation position of a second driving motor being replaced with the first driving motor; a unit configured to generate a speed predicting of the first driving motor; a unit configured to detect a rotation position of the first driving motor; a unit configured to generate an actual position information of the first driving motor; a unit configured to generate an actual speed of the first driving motor; a unit configured to correct an error between the target rotation position and the actual rotation position of the first driving motor; a unit configured to generate a speed error signal; a unit configured to generate a speed control signals of the first driving motor; and a unit configured to output a drive voltage.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: November 1, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Fumihiro Shimizu, Takuya Murata
  • Patent number: 9116019
    Abstract: Disclosed is a technique for compensating for an abnormal output of a resolver. More specifically, a central processing unit (CPU) sets a current motor position angle before compensation ?n,ORG as a current motor position angle ?n and obtains a motor position change ??n[rad] between a current sampling [n] and a previous sampling [n?1] and a motor position change ??n-1[rad] between the previous sampling [n?1] and a more previous sampling [n?2]. Subsequently, a variable A is calculated based on the above angles. The CPU determines whether to perform the compensation by comparing the calculated variable A and a calibration variable K and calculates a current motor position angle for compensation ?n[rad]. Finally, the CPU compensates for the absence of motor rotor position information with the calculated current motor position angle for compensation ?n[rad].
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: August 25, 2015
    Assignee: Hyundai Motor Company
    Inventors: Bum Sik Kim, Tae Hwan Chung, Kang Ho Jeong
  • Patent number: 9110455
    Abstract: A numerical control machine estimates a future rotational speed ahead by a delay time that is a phase difference between a rotational speed fluctuation of a main spindle and a feed rate fluctuation of a feed axis, and fluctuates the feed rate such that a constant ratio is maintained with the estimated rotational speed.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: August 18, 2015
    Assignee: OKUMA Corporation
    Inventor: Shigeki Ueno
  • Patent number: 9035583
    Abstract: The system has a driving circuit for the motor of the electric fan, coupled to the electrical system of a motor vehicle and having a plurality of controlled electronic switches, and an electronic control unit arranged to control the driving circuit in such a way as to cause the flow in the motor of a variable average current capable of producing a required speed of rotation, in accordance with a predetermined relationship or function. The control unit is designed to store a predetermined threshold of rotation speed, and to control the motor through the associated driving circuit in such a way that when the rotational speed of the motor exceeds the threshold the driving circuit causes electrical braking of the motor.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: May 19, 2015
    Assignee: GATE S.R.L.
    Inventors: Davide Cerrato, Pierfranco Pangella
  • Publication number: 20150116681
    Abstract: The present invention provides a computer-readable storage medium which stores a program for causing a computer to generate time-series data of an electric current to be supplied to a motor in order to cause, a control system, including the motor configured to drive an object, to transit from a first state to a second state, the program causing the computer to generate the time-series data so as to satisfy a constraint including a condition to constrain an upper limit value of dispersion of a plurality of state quantities respectively obtained from a plurality of models each of which estimates, from the time-series data, a state quantity of a specific mode of a vibration mode and motion mode of the object, and so that a value of an evaluation function for evaluating the time-series data falls within a tolerance.
    Type: Application
    Filed: October 21, 2014
    Publication date: April 30, 2015
    Inventor: Shinji UEDA
  • Patent number: 9013131
    Abstract: The present disclosure relates to a real-time servo motor controller based on a load weight capable of not only adaptively controlling the servo motor even when load inertia varies in accordance with a weight of a load (material) but also controlling the servo motor in an optimum state regardless of the load weight by reflecting in real time various mechanical variables generated while transferring the load.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: April 21, 2015
    Assignee: Doosan Infracore Co., Ltd.
    Inventor: Ki Hong Kim
  • Publication number: 20150103234
    Abstract: There is provided a drive controller including a determination part that compares a target stop position of a movable body, which is driven by a piezoelectric actuator driven by a piezoelectric element expanded and contracted in response to an applied voltage, with a real position of the movable body acquired on the basis of a position sensor, and determines whether or not the target stop position matches with the real position, and a drive control part that turns off energization of the piezoelectric actuator when the target stop position matches with the real position while the movable body is being driven by the piezoelectric actuator.
    Type: Application
    Filed: September 29, 2014
    Publication date: April 16, 2015
    Inventor: Tomoya TAKEI
  • Patent number: 8988032
    Abstract: A numerical controller capable of visually and accurately analyzing a change of the tool trajectory before and after changing a processing condition, whereby a parameter of a drive axis can be properly adjusted. The numerical controller comprises a numeric controlling part which controls each drive axis based on a predetermined position command; a position data obtaining part which obtains position data of each drive axis controlled by the numerical controlling part; a tool coordinate calculating part which calculates a coordinate of a tool center point based on position feedback or obtained position data of each drive axis and information of a mechanical structure of a machine tool; a tool trajectory storing part which stores the calculated coordinate of the tool center point as a feedback trajectory; and a displaying part which displays the stored feedback trajectory on a display.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: March 24, 2015
    Assignee: FANUC Corporation
    Inventors: Yasusuke Iwashita, Hajime Ogawa
  • Publication number: 20150077031
    Abstract: A numerical control device including a numerical controller, a robot controller, a servo control module and an I/O control module connected to the numerical controller and the robot controller, and an amplifier connecting bus connecting the servo control module and a servo amplifier, and an I/O device connecting bus connecting an I/O control module and an I/O interface device. The machine-tool-side and robot-side servo amplifiers are daisy-chained and the machine-tool-side and robot-side I/O interface devices are daisy-chained.
    Type: Application
    Filed: September 11, 2014
    Publication date: March 19, 2015
    Applicant: FANUC CORPORATION
    Inventors: Naoki Sugitani, Kazunari Aoyama
  • Patent number: 8970156
    Abstract: A path display apparatus includes a first position command acquiring unit that acquires first position command for motors, a first position feedback acquiring unit that acquires first position feedback of each of the motors, a correction data acquiring unit that acquires correction data generated for each of the motors, a second position command calculating unit that subtracts the correction data from the first position command to calculate a second position command, a second position feedback calculating unit that subtracts the correction data from the first position feedback to calculate second position feedback, a command path display unit that displays a command path of the tip point of the tool, based on the second position command; and a feedback path display unit that displays a feedback path of the tip point of the tool, based on the second position feedback.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: March 3, 2015
    Assignee: FANUC Corporation
    Inventors: Junichi Tezuka, Hajime Ogawa
  • Patent number: 8963470
    Abstract: A motor control apparatus that controls rotation of a rotor of an electric motor powered from an electric power source includes a learning portion that executes an initial drive learning process, and a controller that executes a normal drive operation to sequentially change an exciting phase of the electric motor based on a count value of a counter which is corrected by a correcting portion such that the rotor is rotated to a target position after an initial drive operation is finished. The learning portion re-executes the initial drive learning process after a predetermined condition is satisfied, when the initial drive learning process is failed.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: February 24, 2015
    Assignee: Denso Corporation
    Inventors: Kiyoshi Kimura, Jun Yamada, Masaaki Shinojima
  • Patent number: 8941345
    Abstract: A multi-shaft motor drive device comprises at least one amplifier module, a control substrate, and a power substrate. The at least one amplifier module is configured to supply power to at least one motor. The control substrate connected with the amplifier module. The power substrate is connected with the amplifier module. The amplifier module comprises a switching element. The control substrate is provided with a signal line disposed for controlling the switching element according to a motor control instruction from a master controller. The power substrate is provided with a power line disposed for supplying power to the amplifier module. The control substrate and the power substrate are arranged separately each other.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: January 27, 2015
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Takashi Maeda, Takehisa Fukano
  • Publication number: 20140355119
    Abstract: Vibration is suppressed in a feedback type VCM actuator. A converting unit converts a position command value into an internal command value varied based on a waveform having a period which is half of a period of a trigonometric function, the position command value being indicative of a position of a mover and changeable step by step. A driving unit receives a position detection value indicating a current position of the mover from a sensor and drives a voice coil motor such that the position detection value matches the internal command value.
    Type: Application
    Filed: May 29, 2014
    Publication date: December 4, 2014
    Applicant: ROHM CO., LTD.
    Inventor: Kazuhiro MATSUMOTO
  • Patent number: 8896251
    Abstract: This disclosure relates to diagnosing a power electronic device by itself and extending the diagnostics to an electric machine coupled with the power electronic device and deployed at an operational site. The power electronic device can power and control the electric machine. The diagnostics can include testing the status of the power electronic device, and monitoring hardware changes in the electric machine. The diagnostics can be performed within the power electronic device on demand, periodically, or both. In some instances, the self-diagnostics can evaluate whether components are defective or wired incorrectly, characterized by wrong inductance, and/or resistance, for example. In some implementations, the power electronic device includes a digital signal processing unit for the self-diagnostics and a data record system for recording and troubleshooting errors related to load performance and/or parameters.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: November 25, 2014
    Assignee: Calnetix Technologies, LLC
    Inventors: Dong Le, Liping Zheng
  • Patent number: 8847538
    Abstract: An electric motor includes at least one first brush and at least one second brush, which are arranged in a stationary fashion and arranged to contact a commutator that rotates with a rotor. The commutator includes at least one cylindrical section with a circumferential surface on which a plurality of segments are arranged with insulating sections interposed between them. In order to detect the rotating speed and position of the rotor, the motor includes brushes with asymmetric circumferential widths or angles or a stator with an uneven magnetization. The motor is arranged to detect only one signal when the rotor rotates for an angle between two adjacent segments.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: September 30, 2014
    Assignee: Nidec Motors & Actuators (Germany) GmbH
    Inventors: Rainer Bruhn, Thomas Voegerl, Andrè Ebel, Che sakre Bin Shamsol
  • Publication number: 20140260841
    Abstract: A machine tool having a monolithic base is disclosed. The monolithic base includes at least two flat surfaces that are mutually orthogonal and that are convex with respect to each other. The machine tool includes at least two moveable stages, each mounted to one of the flat surfaces, and each stage also being mutually orthogonal.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 18, 2014
    Applicant: MICROLUTION INC.
    Inventors: Andrew Honegger, Michael Howard, Elizabeth Amundsen, Brendon DiVincenzo, Grzegorz Nowobilski, Andrew Phillip
  • Patent number: 8836266
    Abstract: A small motor controller (SMC) system includes a motor configured to control a position of a rotor, a sensor configured to detect position information of the rotor by detecting a feature on the rotor, the sensor including a detection zone having a first side and a second side, and a motor control unit. The motor control unit is configured to determine a position of the rotor corresponding to one of the first side of the detection zone and the second side of the detection zone based on whether the feature on the rotor is detected crossing the first side or the second side, respectively.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: September 16, 2014
    Assignee: The Johns Hopkins University
    Inventors: Kapil D Katyal, Matthew P. Para, Andrew J. Harris, Harry A. Eaton
  • Patent number: 8829845
    Abstract: Embodiments of the invention provide a starter machine including an electronic control unit. The electronic control unit can be in communication with one or more sensors. The control system can include a starter machine that is in communication with the electronic control unit. The starter machine can comprise a solenoid assembly that includes a plurality of biasing members, a motor that is coupled to a pinion, and power module and controller that is coupled to the motor. In some embodiments, at least one of the power module and the controller are configured to control a speed of the pinion to substantially synchronize the pinion speed and the speed of an engine component.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: September 9, 2014
    Assignee: Remy Technologies, LLC
    Inventor: Michael D. Bradfield
  • Patent number: 8803466
    Abstract: A motor control apparatus includes a position detector to detect a position of a motor. A speed operator calculates a first speed of the motor. A position controller outputs a first speed command. A speed controller acquires a difference between the first speed command and a second speed of the motor to output a first torque/thrust command. A phase compensator includes a lowpass filter to advance a phase of the second speed, and acquires the first speed and the first torque/thrust command to output the second speed. An inertia variation inhibitor includes a disturbance observer estimating a disturbance torque/thrust. The inertia variation inhibitor acquires the first speed and a second torque/thrust command, and adds the disturbance torque/thrust to the first torque/thrust command to output the second torque/thrust command. A torque/thrust controller acquires the second torque/thrust command to control a motor torque/thrust.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: August 12, 2014
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Yasufumi Yoshiura, Yasuhiko Kaku
  • Publication number: 20140217951
    Abstract: A motor control device includes a power converter, a velocity controller, and a certain-position stop controller. The power converter outputs a driving current on the basis of an input torque command. The velocity controller generates a calculated torque command on the basis of a difference between a velocity represented by a velocity command and a motor velocity. The certain-position stop controller performs position control by, after first detecting a reference position of a motor during velocity control, generating a position command for positioning the motor from the reference position to a target stop position at a torque of a torque schedule, generating the velocity command on the basis of a difference between a position represented by the position command and the motor position, and outputting a value resulting from adding a torque feedforward command generated on the basis of the torque schedule to the calculated torque command.
    Type: Application
    Filed: February 4, 2014
    Publication date: August 7, 2014
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventor: Tominori SUGIHARA
  • Publication number: 20140184129
    Abstract: A multi-axis motor driving system, including a plurality of motor driving apparatuses respectively connected to motors and each provided with a regenerative power consumption unit for consuming regenerative power generated from the corresponding motor. The plurality of motor driving apparatuses are connected to a common DC bus. The plurality of motor driving apparatuses each include a regenerative controller for controlling start and stop of activation of the regenerative power consumption unit based on a voltage of the common DC bus.
    Type: Application
    Filed: December 26, 2013
    Publication date: July 3, 2014
    Applicant: Kabushiki Kaisha Yaskawa Denki
    Inventors: Yusuke OKA, Tadashi OKUBO, Akira TAKEUCHI
  • Publication number: 20140152229
    Abstract: A method for calibrating a positioner system that has an electronically commutated servomotor and a counterforce-loaded actuator coupled thereto includes actuating the servomotor such that a first motor magnetic field of a first strength is generated and determining a first position specification for the position of the actuator aligned to the first motor magnetic field. The servomotor is actuated such that a second motor magnetic field of a second strength is generated and a second position specification for the position of the actuator aligned to the second motor magnetic field is determined. Based on the first and the second position specifications, a position specification which indicates a position of the actuator under the assumption that the actuator is not loaded with a counterforce is determined. The determined position is allocated to a rotor position which corresponds to the direction of the first and second motor magnetic field.
    Type: Application
    Filed: January 10, 2012
    Publication date: June 5, 2014
    Applicant: ROBERT BOSCH GmbH
    Inventors: Alex Grossmann, Udo Sieber, Ralf Buehrle, Zeynep Tosun
  • Patent number: 8643315
    Abstract: A system for controlling the operation of a heating or cooling system includes a system controller, a memory in which system parameter information relating to the heating or cooling system is stored, and a communication device through which the system controller is configured to transmit and receive signals to/from at least one component controller. The system controller is configured to receive via the communication device a data signal from the at least one component controller that includes information relating to operational parameters for at least one system component installed in the heating and cooling system. The system controller is configured to store in the memory the received operational parameters corresponding to the at least one system component. The stored operational parameters may be retrievable for communication to a replacement component controller in the event that the at least one component controller is replaced.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: February 4, 2014
    Assignee: Emerson Electric Co.
    Inventors: William P. Butler, Edward B. Evans, Thomas B. Lorenz, Carl J. Mueller, Steven L. Carey, G. Scott Vogel
  • Patent number: 8629641
    Abstract: A machine tool includes a time calculation unit calculating the time for a spindle to arrive at a target rotational speed, and the time for a spindle head to arrive at a target position; a comparison unit comparing the time to arrive at the target rotational speed and the time to arrive at the target position; and a drive control unit controlling the drive of the spindle and the drive of the spindle head. The drive control unit controls the drive of the spindle head, when a determination is made that the time to arrive at the target rotational speed is longer than the time to arrive at the target position, such that the time for the spindle head to arrive at the target position is longer than the calculated time to arrive at the target position, and less than or equal to the calculated time to arrive at the target rotational speed. Accordingly, the machine tool can drive the spindle head that is a control object in a power-saving mode.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: January 14, 2014
    Assignee: Mori Seiki Co., Ltd.
    Inventors: Makoto Fujishima, Hiroki Nakahira
  • Patent number: 8593090
    Abstract: A motor drive is provided that includes a control circuit or board and a one or more functional circuits or option boards coupled to the control board, and a profile that includes a configuration for the option board. A method of operating a motor drive that includes loading a profile for a option board coupled to a control board of the controller, wherein the profile comprises a configuration for the option board. A tangible machine-readable medium implementing the method is also provided.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: November 26, 2013
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Alan J. Campbell, John Howard Stuedemann, Gary A. Kabitzke, Ronald Rudy Hrlevich
  • Publication number: 20130293178
    Abstract: A motor control profiler includes: a position calculation main state machine for generating command data to control a motor, the command data being in a polynomial expression of higher degree; a parameter set machine for setting a coefficient and a constant of the polynomial expression of higher degree of the command data; a control state machine for setting a control state of the motor; a time slot control and computation resource management machine for controlling a calculation machine, based on the set coefficient and constant of the polynomial expression of higher degree and the set control state of the motor; and a calculation machine for calculating the amount of motion according to the drive of the motor based on the time slot control and computation resource management.
    Type: Application
    Filed: May 24, 2012
    Publication date: November 7, 2013
    Inventors: Se Jin Kang, Kwan Ok Kim
  • Patent number: 8575882
    Abstract: Solid state switches of inverters are controlled by timing signals computed in power layer interface circuitry for individual inverters. Multiple inverters may be placed in parallel with common three-phase output. Common control circuitry generates timing signals or data used to reconstruct the common signals and sends these signals to the power layer interface circuitry. A processor in a power layer interface circuitry used these signals to recomputed the timing signals. Excellent synchronicity may be provided between parallel inverters that each separately reconstruct the timing signals based upon the identical received data.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: November 5, 2013
    Assignee: Rockwell Automation Technologies, Inc.
    Inventor: Richard H. Radosevich
  • Publication number: 20130285589
    Abstract: An upper-level control device includes a communication control unit that transmits a command, which is used after a command that is currently executed and includes an execution order, to an electric motor control device during electric motor control devices respectively perform driving controls of electric motors, and each of the electric motor control devices includes a command storage unit configured to store a plurality of commands, a communication control unit that stores the command received from the upper-level control device in the command storage unit in the execution order, and a command-follow-up control unit that performs a follow-up control of the electric motors based on the command. When the command storage unit is fully filled with the commands, the communication control unit stores a newly received command in the command storage unit by overwriting the newly received command in an area where an executed command is stored.
    Type: Application
    Filed: February 21, 2011
    Publication date: October 31, 2013
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroshi Sugie, Masahiro Ougiwari, Daisuke Koyama
  • Patent number: 8547047
    Abstract: In a method and device for monitoring a movement-controlled machine, such as a manipulator, having an electronically commutated drive motor for which a commutation angle is provided based on its detected real position and a control variable, in particular a predetermined desired position, a limit value is determined for a rate of change in particular a time derivative of the real position of the drive motor, and the commutation angle is predetermined such that the rate of change of the commutation angle does not exceed a limit value.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: October 1, 2013
    Assignee: Kuka Laboratories GmbH
    Inventors: Uwe Bonin, Josef Hofmann
  • Patent number: 8521373
    Abstract: An industrial truck having height-adjustable load bearing means, lifting height controls in which a plurality of predetermined lifting heights are saved, a lifting height detection system for the load bearing means that detects an actual value of the lifting height and provides it to the lifting height controls, and a control unit that allows the lifting height of the load bearing means to be manually adjusted at different speeds, wherein the lifting height controls move the load bearing means to one of the predetermined lifting heights when the speed for adjusting the load bearing means specified by the control unit falls below a predetermined threshold, wherein the lifting height assumed by the lifting height controls corresponds to the lifting height of the predetermined lifting heights that most closely approximates the actual value of the lifting height in the direction in which the load bearing means is moving.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: August 27, 2013
    Assignee: Jungheinrich Aktiengesellschaft
    Inventors: Christoph Behncke, Matthias Düwel
  • Patent number: 8494671
    Abstract: The invention relates to a grinding machine for grinding a workpiece, which has been set on a chuck top surface, by moving a rotating grinding wheel in relation to the workpiece. The grinding machine includes: a microscope configured to be vertically movable; a CCD camera configured to take an image viewed through the microscope; and an image processor configured to process the image taken by the CCD camera to measure a vertical distance between a reference plane of the microscope and an object of the microscope. The image processor is adapted to measure the vertical distance between the reference plane of the microscope and the object of the microscope based on sharpness of the image, which corresponds to how clear the microscope is focused.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: July 23, 2013
    Assignee: Toshiba Kakai Kabushiki Kaisha
    Inventors: Takanobu Akiyama, Hiroyuki Kakishima
  • Patent number: 8482240
    Abstract: A system, in one embodiment, includes a drive having a housing, a stator disposed in the housing, a rotor disposed in the stator, and a programmable logic controller disposed inside, mounted on, or in general proximity to the housing. In another embodiment, a system includes a network, a first motor having a first integral programmable logic controller coupled to the network, and a second motor having a second integral programmable logic controller coupled to the network. In a further embodiment, a system includes a rotary machine having a rotor and a stator disposed concentric with one another, a microprocessor, memory coupled to the microprocessor, a power supply coupled to the microprocessor and the memory, and a machine sensor coupled to the microprocessor.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: July 9, 2013
    Assignee: Rockwell Automation Technologies, Inc.
    Inventor: Yehia M. El-Ibiary
  • Patent number: 8456111
    Abstract: A linear drive based on linear motors, for panels, in particular sliding doors, movable along a respective travel path. A linear drive for at least one panel, in particular a sliding door leaf, movable along a travel path, has at least one linear motor for this at least one panel. The linear motor is provided with a stator member and a carriage. Furthermore, the linear drive has a control circuit. The control circuit is adapted to stop the linear motor in the event of failure of power supply to the linear motor, by switching-off the linear motor and operating it as a generator. Thereupon, in terms of its displaceability, this movable panel is enabled by the control circuit. In addition, the linear drive has a switch for switching-off the energy supply to the at least one linear motor.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: June 4, 2013
    Assignee: Dorma GmbH & Co. KG
    Inventor: Sven Busch
  • Patent number: 8456126
    Abstract: There is provided a motor control system and motor control method which can shorten settling time by restraining vibration and deviation relative to an advancing direction during operation. Moreover, according to the present invention, it is possible to cause a motor to be operated with an ideal track and, since it is possible to always monitor a present position, it is made easy to cause a plurality of axes to be synchronously operated. The motor control system is provided with a unit generating command waveforms from a jerk data which has significant effects on the vibration relative to the advancing direction, and a unit performing a real time real position control of regenerating future command waveforms according to a deviation amount, while always performing jerk-limit, whereby the vibration and the deviation relative to the advancing direction when the motor operates at high speed are restrained.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: June 4, 2013
    Assignee: Hitachi High-Tech Instruments Co., Ltd.
    Inventors: Mitsuaki Tate, Yasushi Ishii, Masamichi Kihara
  • Publication number: 20130119916
    Abstract: A control signal for controlling an operation of a motion control system suitable for positioning a load is generated using determining a cost function based on a model of energy consumption of the system and a function of a tracking time; and minimizing the cost function subject to constraints to determine a trajectory of the control signal. The control signal is generated based on the trajectory and a current state of the system, wherein the steps of the method are performed by a processor.
    Type: Application
    Filed: November 10, 2011
    Publication date: May 16, 2013
    Inventors: Yebin Wang, Koichiro Ueda, Scott A. Bortoff
  • Publication number: 20130057191
    Abstract: A motor control apparatus includes a position detector to detect a position of a motor. A speed operator calculates a first speed of the motor. A position controller outputs a first speed command. A speed controller acquires a difference between the first speed command and a second speed of the motor to output a first torque/thrust command. A phase compensator includes a lowpass filter to advance a phase of the second speed, and acquires the first speed and the first torque/thrust command to output the second speed. An inertia variation inhibitor includes a disturbance observer estimating a disturbance torque/thrust. The inertia variation inhibitor acquires the first speed and a second torque/thrust command, and adds the disturbance torque/thrust to the first torque/thrust command to output the second torque/thrust command. A torque/thrust controller acquires the second torque/thrust command to control a motor torque/thrust.
    Type: Application
    Filed: August 10, 2012
    Publication date: March 7, 2013
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Yasufumi YOSHIURA, Yasuhiko KAKU
  • Patent number: 8334669
    Abstract: In the multi-axis driver control method for transmitting a command from an external device to the drive-axis basis controller of the multi-axis driver to set operation and/or parameters of the drive-axis basis controller, the external device is connected to the multi-axis driver on a one-to-one basis, and the external interface is connected to the drive-axis basis controller via a multi-dropped connecting portion. The drive-axis basis controller determines whether the command is self-addressed or not and, if the command is self-addressed, the drive-axis basis controller executes the command and transmits response data corresponding to the command and a transmission permission flag to the multi-dropped connecting portion. The multi-dropped connecting portion opens a transmission port in response to the transmission permission flag and transmits the response data to the external device, and after transmission is finished, the multi-dropped connecting portion closes the transmission port.
    Type: Grant
    Filed: October 27, 2008
    Date of Patent: December 18, 2012
    Assignee: THK Co., Ltd.
    Inventor: Yoshifumi Nagato
  • Patent number: 8299742
    Abstract: A method for decelerating a motor in a computer numerical controlled machine tool is provided. The method includes calculating a present rate of deceleration DP, for a motor of a motor drive system, based on a present speed SP of the motor, a reference speed SR of the motor, and a reference rate of deceleration DR of the motor. The method also includes decelerating the motor from SP according to DP. The motor drive system comprises a maximum power rating that defines a maximum power, generated by the motor while decelerating, that can be dissipated without overloading the motor drive system. DR is a rate of deceleration such that power, generated by the motor while decelerating from SR according to DR, is equal to the maximum power rating. Power, generated while decelerating the motor from SP according to DP, is equal to or less than the maximum power rating.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: October 30, 2012
    Assignee: Haas Automation, Inc.
    Inventors: Joseph V. Soliman, German M. Chistokhodov, Barry D. Johnson, Robert M. Weston, Razmik G. Petrossians
  • Patent number: 8294405
    Abstract: The invention relates to a method and a device for guiding the movement of a moving machine element on a numerically controlled machine, whereby maximum possible track speed, maximum possible track acceleration, and maximum possible track jerk are defined by means of given restrictions on track axes. The local minima for the maximum possible track speed are determined, whereby for each local minimum a corresponding left-sided and right-sided track speed segment is determined, whereby, for track values for the displacement track to the left and right of a given minimum, the resulting track speed is determined by using the maximum possible track jerk and the maximum possible track acceleration until the track speed exceeds the maximum possible track speed to the left and right of the minimum, a track jerk curve for the movement guidance is hence determined.
    Type: Grant
    Filed: December 5, 2005
    Date of Patent: October 23, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Walter Hoffmann, Wolfgang Papiernik, Tomas Sauer
  • 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