Limit Or End-stop Control Patents (Class 318/626)
  • Patent number: 11662004
    Abstract: A disconnection assembly has a one-way clutch. The one-way clutch serves to either connect or disconnect the power connection of a vehicle. The disconnection assembly is installed in a reducer including an intermediate shaft, a bushing, an outer gear and a one-way clutch. The bushing is secured to the intermediate shaft by spline. The one-way clutch is disposed between the bushing and the outer gear. The one-way clutch is locked to drive the rotation of the intermediate shaft through the bushing when the outer gear rotates in a first direction, and the one-way clutch is released to allow the outer gear rotates freely when the outer gear rotates in a second direction.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: May 30, 2023
    Assignee: SHANGHAI XPT TECHNOLOGY LIMITED
    Inventors: Hongxia Chen, Chuanwei Ren
  • Patent number: 11340578
    Abstract: A machine control system includes a first movable element configured to be driven by a first motor, a second movable element configured to be driven by a second motor which is connected to the first motor so that a jerk to be generated by the first motor is applied to the second movable element, and control circuitry configured to generate a first control command to control the first motor and to generate a second control command to control the second motor according to the jerk.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: May 24, 2022
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Kenichi Hirose, Atsuro Tandai, Yasuhiro Suzuki
  • Patent number: 10692519
    Abstract: Various methods and systems are provided for implementing classification-based adjustable seek energy settings in storage device systems. In particular, operations support adjusting seek energy settings for storage device components, for executing requests. In operation, a classification is selected for a request. The classification indicates a first priority level for executing the request. The priority level is associated with a first adjustable seek energy setting of a plurality adjustable seek energy settings for executing requests on the hard disk drive system, where a seek energy setting is an adjustable operational speed or energy setting for the hard disk drive system. Based on the classification indicating the priority level, the classification is transmitted to cause the hard disk drive system to set the adjustable seek energy setting. One or more hardware components of the hard disk drive system operates to execute the first request based on the first adjustable seek energy setting.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: June 23, 2020
    Assignee: Microsoft Tchnology Licensing, LLC
    Inventor: Michael Sean McGrath
  • Patent number: 10615726
    Abstract: According to one embodiment, a power generation system includes a power generator, a displacement measuring part, and a converter. The power generator includes a movable part and converts mechanical energy of the movable part into electric power. The displacement measuring part measures a displacement of the movable part. The converter includes a switching circuit whose duty ratio is controlled based on the measured displacement, and converts a voltage level of the electric power.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: April 7, 2020
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Atsuro Oonishi, Hiroshi Takahashi, Takeshi Ueno
  • Patent number: 10145173
    Abstract: A motorized system that allows for calibration by a user, and that features circuit protection and detection of motor stoppage. A motorized window-blind system is an example of such a system and is disclosed herein. In particular, a circuit is featured that comprises a TRIAC, or “triode for alternating current,” and TVS diodes, or “transient-voltage-suppression diodes,” providing voltage protection to various types of motor-related electronic components. A controller is disclosed that features measurement of voltage that is induced on a secondary winding of a motor, in order to detect certain events that occur during the operation of the motor. A calibration method is also disclosed that can account for one or both of the protection circuit and event-detecting controller. The calibration method accounts for human interaction and, in doing so, is intended toward making a calibration process of a motorized household system less prone to human error.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: December 4, 2018
    Assignee: Silvair sp. z o.o.
    Inventors: Szymon Slupik, Maciej Witalinski, Adam Gembala
  • Patent number: 9786152
    Abstract: The septic overflow warning system includes a sensor unit that is adapted to secure itself to a tank lip of a septic tank. The sensor unit includes a float that is adapted to be moved up or down depending upon the waste level inside of the septic tank. Moreover, the float is slideably positioned on a sensor rod that is in wired connection with an alarm module. The alarm module includes a plurality of lights thereon. The plurality of lights collectively indicates the status of the volume of the septic tank via the float. The alarm module is powered via at least one solar cell.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: October 10, 2017
    Inventor: John Walker
  • Patent number: 9065367
    Abstract: A method of controlling a brushless motor that includes exciting a winding of the motor until current in the winding exceeds a threshold, and then continuing to excite the winding for an overrun period. The length of the overrun period is adjusted in response to a change in one of time, motor speed and excitation voltage. Additionally, a control system that implements the method, and a motor system that incorporates the control system.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: June 23, 2015
    Assignee: Dyson Technology Limited
    Inventor: Stephen Greetham
  • Patent number: 9051768
    Abstract: Disclosed are alternate embodiments of various components of a barrier operator system. and methods of operation, including of the mechanical drive subsystem with segmented and self-locking rail unit, rail mounting supports, belt and chain drive tensioning, and drive assembly carriage and interface; the electronics and software routines for controlled operation of the various barrier operator functions; wall console communications with the barrier operator; encryption and decryption of access codes; establishment and monitoring of travel limits and barrier speed and force profiles; thermal protection of barrier operator drive motors; and establishment and control of communications from the barrier operator to accessories by way of a wireless adapter.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: June 9, 2015
    Assignee: Overhead Door Corporation
    Inventors: Leroy G. Krupke, Mark Kenneth Siegesmund, Mark Raymond Wilzbach
  • Patent number: 9018885
    Abstract: A motor controller receiving as input an encoder signal changing in response to a driving position of a motor, outputting a motor driving command in response to the encoder signal to control at least one of the driving position or a driving velocity of the motor, includes an interrupt processing section to execute interrupt operations every prescribed interrupt cycle, a low-frequency processing section to selectively execute a subset of the interrupt operations every prescribed number of the interrupt cycles, and a high-frequency processing section to execute another subset of the interrupt operations every prescribed interrupt cycle, wherein the high-frequency processing section executes at least an operation to detect the driving position indicated by the encoder signal, wherein the low-frequency processing section executes at least an operation to generate the motor driving command.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: April 28, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Haruyuki Suzuki, Takuya Murata
  • Publication number: 20150042257
    Abstract: An actuation device for movement of a barrier comprising a gear motor adapted to transmit a rotary motion to a tubular support, integrally connected to said barrier and rotating with respect to a fixed support. The actuation device comprises actuation means manually operable by a user and reversibly movable between a position decoupled from, and a position coupled with, a microswitch to start/stop a detection procedure of an end-of-travel position for said gear motor.
    Type: Application
    Filed: December 17, 2012
    Publication date: February 12, 2015
    Inventors: Andrea Malausa, Bruno Bortolan
  • Patent number: 8917049
    Abstract: When a failure of a feedback control operation of an electric motor is sensed, a control unit changes the feedback control operation to an open loop control operation. At the time of executing the open loop control operation, the control unit sequentially changes the exciting phase of the motor without executing feedback of information of the count value of the encoder counter and rotates a rotor of the motor until a count value of an exciting phase change counter reaches an open loop target count value, which corresponds to a target rotational position of the rotor. When the control unit changes the feedback control operation to the open loop control operation, the control unit sets the open loop target count value by correcting a feedback target count value based on an exciting phase deviation correction value for the count value of the encoder counter.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: December 23, 2014
    Assignee: Denso Corporation
    Inventor: Jun Yamada
  • Patent number: 8901873
    Abstract: The present invention discloses a mechanical equipment. The sensing member and the sensed member are mounted on the power device, and one of the sensing member and the sensed member is mounted on the output mechanism to move periodically as the output mechanism moving periodically. When each time the sensing member and the sensed member are located relatively at a predetermined position, the control device receives the sensing signal generated when the sensing member senses the sensed member and sends a predetermined control command to the power mechanism when the sensing signals received by the control device reach the threshold value. Therefore, the present invention can achieve controlling the working state of the mechanical equipment and reduce the failure probability of the mechanical equipment at the same time.
    Type: Grant
    Filed: November 23, 2012
    Date of Patent: December 2, 2014
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventors: Guokun Yang, Chunhao Wu, Kunhsien Lin, Minghu Qi, Zhenhua Guo, Yongqiang Wang, Zenghong Chen, Chenyangzi Li, Zhiyou Shu, Weibing Yang
  • Publication number: 20140346996
    Abstract: A position limiting device includes a magnetic element, a detecting element, a motor, and a controller. The magnetic element is disposed in the center of the position limiting device, the motor is coupled to the detecting element, and the controller is electrically coupled to the detecting element and the motor. The detecting element is configured to detect magnetic fields generated by the magnetic element, and correspondingly generate and transmit a magnetic field intensity signal. The controller is configured to receive and process the magnetic field intensity signal to obtain a magnetic field intensity value. In addition, the controller is further configured to compare the magnetic field intensity value and a magnetic field intensity boundary value. When the magnetic field intensity value is less than the magnetic field intensity boundary value, the controller drives the motor so that the motor makes the detecting element to move correspondingly to the magnetic element.
    Type: Application
    Filed: December 2, 2013
    Publication date: November 27, 2014
    Applicant: DELTA ELECTRONICS, INC.
    Inventor: Pin-Hao FANG
  • Publication number: 20140285132
    Abstract: An actuator comprising a single actuator housing containing within it a motor, a controller, a memory, and a position sensor having an output, a user interface for causing a first threshold value to be stored in the memory, and the controller configured and arranged to stop the motor as a function of the position sensor output and the first threshold value.
    Type: Application
    Filed: October 8, 2012
    Publication date: September 25, 2014
    Inventor: Daniel A. Mast, JR.
  • Publication number: 20140265991
    Abstract: A method for configuring a controller to operate a motor to position a seat, in which the controller includes an integrated current sensor and the seat includes a latch operatively coupled to the motor, includes determining an operating profile of the motor under one or more operating conditions, wherein the operating profile represents motor current values during activation of the latch, and wherein the activation of the latch includes at least one latch pulling condition and one latch release condition. The method further includes analyzing the operating profile in order to correlate the profile to the position of the latch. The method also includes loading the controller with instructions to enable comparison of a real-time current measured by the integrated current sensor to the stored operating profile, wherein the analysis enables determination of the latch condition in real-time.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventors: Xiao Ming Zhao, Renato Colja, Horia Blendea
  • Patent number: 8810166
    Abstract: An opening and closing device includes a cover gear, a driving source, a cover, a biasing element, and a control portion. The cover gear is rotatably supported in both forward and backward directions. The driving source selectively provides rotation to the cover gear in both the forward and backward directions. The cover is rotatably supported to allow motion in both the forward and backward directions between first and second positions. The biasing element transmits the rotation of the cover gear to the cover while biasing the cover in a predetermined direction from the first position to the second position. The control portion stops the rotation of the driving source, in a case in which the driving source is rotated to move the cover in the predetermined direction, when the cover gear rotates in the predetermined direction by a predetermined angle after the cover has reached the second position.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: August 19, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroyuki Nagao, Kazuhisa Yoneda, Shinichiroh Hiraoka, Yasushi Nakamura, Hidenobu Mandai
  • Patent number: 8803463
    Abstract: A method for moving a movable element into a block position includes providing a supply voltage to an electric motor associated with the movable element for the motor to generate a motor current and drive the element with motor power dependent on the motor current in order to move the element along a path. Upon the element being moved into a block position of the path, the supply voltage provided to the motor is controlled such that the motor current generated by the motor is continuously reduced over a time period to zero. For instance, the supply voltage is pulse-width modulated at a decreasing pulse duty ratio over the time period such that the motor current generated by the motor is continuously reduced over the time period to zero.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: August 12, 2014
    Assignee: Leopold Kostal GmbH & Co. KG
    Inventors: Stefan Otte, Matthias Steinbach
  • Publication number: 20140184130
    Abstract: The present invention discloses a mechanical equipment. The sensing member and the sensed member are mounted on the power device, and one of the sensing member and the sensed member is mounted on the output mechanism to move periodically as the output mechanism moving periodically. When each time the sensing member and the sensed member are located relatively at a predetermined position, the control device receives the sensing signal generated when the sensing member senses the sensed member and sends a predetermined control command to the power mechanism when the sensing signals received by the control device reach the threshold value. Therefore, the present invention can achieve controlling the working state of the mechanical equipment and reduce the failure probability of the mechanical equipment at the same time.
    Type: Application
    Filed: November 23, 2012
    Publication date: July 3, 2014
    Applicant: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventors: Guokun Yang, Chunhao Wu, Kunhsien Lin, Minghu Qi, Zhenhua Guo, Yongqiang Wang, Zenghong Chen, Chenyangzi Li, Zhiyou Shu, Weibing Yang
  • Publication number: 20140139172
    Abstract: In a butting control, while performing a constant current control for a motor based on an output of a current sensor, the motor is driven by sequentially switching over a current supply phase of the motor in a one-phase current supply method, in which only one of the phases of the motor is powered. By performing the constant current control in the butting control, changes in a current value of each phase caused by temperature changes or aging changes is suppressed and hence a torque change of the motor is suppressed. In addition, by sequentially switching over the current supply phase of the motor in the one phase current supply method under the constant current control, a torque change of the motor can be suppressed while maintaining the current value of the current supply phase at a constant value.
    Type: Application
    Filed: October 16, 2013
    Publication date: May 22, 2014
    Applicant: DENSO CORPORATION
    Inventor: Jun YAMADA
  • Patent number: 8710787
    Abstract: A servomotor control circuit for an air conditioner apparatus of a vehicle includes a drive control section for controlling drive of a servomotor so that the servomotor attains a target stop position, a rotation position change detection section for detecting a change in the rotation position of the servomotor, and an operation limit check section for checking, based on the change in the rotation position of the servomotor, whether the servomotor has attained the operation limit position. The drive control section stops drive of the servomotor without reception of a servomotor drive stop command produced from a main control apparatus, when the servomotor is determined as having attained the operation limit position.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: April 29, 2014
    Assignee: Denso Corporation
    Inventor: Nobuaki Koshobu
  • Patent number: 8692503
    Abstract: A method of homing motion axes in a radiation system uses a motor and one or more hardstops. A load is driven by a motor to move toward a hardstop during which an electrical parameter of the motor is monitored. A reference position for the motion axis is defined when the monitored electrical parameter reaches or exceeds a determined value. Alternative to monitoring the motor electrical parameter, the motor velocity may be monitored during the motion and a reference position for the motion axis is defined when the monitored motor velocity falls to or below a determined value. Alternatively, the load velocity may be monitored during the motion and a reference position for the motion axis is defined when the monitored load velocity falls to or below a determined value.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: April 8, 2014
    Assignee: Varian Medical Systems, Inc.
    Inventor: Robert T. Wiggers
  • Patent number: 8604743
    Abstract: An especially failsafe method for operating an electric window lift for closing and opening a window of a convertible is provided. A threshold value that is relevant to the triggering of an anti-pinch protection system of the window lift is regularly adapted to the actuation-position-dependent behavior of a sensed operating quantity of the window lift, at least in a lower region of the actuation path of the window, both when the top of the convertible is closed and when it is open. At least for the first window closing process after a closing of the top, the threshold value is rigidly predefined in an upper region of the actuation path of the window.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: December 10, 2013
    Assignee: Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Hallstadt
    Inventors: René Zellmer, Roland Kalb
  • Publication number: 20130285590
    Abstract: A reference angle detecting device includes a control shaft connected to a controlled object, an electric motor causing the control shaft to rotate via a worm gear mechanism, a stopper disposed on a motion track of a worm wheel, an angle sensor that can detect a rotation angle of the control shaft, and a controller. The stopper includes a spring member which is elastically deformable in an operation direction of the worm wheel. The controller drives the electric motor to operate so that the worm wheel may face the stopper, and stores the rotation angle at a time point when a change rate ? of the rotation angle ? detected by the angle sensor changes to a value less than a predetermined threshold ?1 as a reference angle ?0. Therefore, the reference angle can be detected with high accuracy for control of an angle of the control shaft.
    Type: Application
    Filed: November 29, 2011
    Publication date: October 31, 2013
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Eiji Sato, Satoaki Ichi
  • Patent number: 8519659
    Abstract: Provided is a low-cost control device for an electric servo press, which is excellent in operability and operation efficiency, capable of abruptly stopping a servomotor in a safe and reliable manner within a short time period in response to an abrupt stop command while avoiding hard actuation of a mechanical brake, even in the case of runaway of the servomotor or the like. An electric servo press performs switching to rotation stop control for a servomotor according to an abrupt stop motion based on an abrupt stop command signal to perform brake actuation to cause a mechanical brake to actually start braking and to forcibly interrupt rotational drive power to the servomotor at a scheduled stop time at which the servomotor is stopped according to the abrupt stop motion.
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: August 27, 2013
    Assignee: Aida Engineering, Ltd.
    Inventor: Atsushi Someya
  • Patent number: 8456124
    Abstract: A parallel mechanism includes a base portion, a bracket to which an end effecter is attached, a plurality of actuators attached to the base portion, a plurality of arms through which the plurality of actuators and the bracket are coupled together in parallel, and a control device arranged to control the actuators. When the end effecter in a stopped state is moved to a target position, the control device is arranged to control the actuators so that a level of acceleration at which the end effecter is accelerated is higher than a level of deceleration at which the end effecter is decelerated.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: June 4, 2013
    Assignee: Murata Machinery, Ltd.
    Inventors: Tatsuhiko Nishida, Hideaki Nakanishi, Manabu Yamashita
  • Patent number: 8427094
    Abstract: A method for controlling positioning of an actuator having a wave gear device uses an exact linearization technique to compensate effects relative to positioning control of a load shaft caused by the non-linear spring characteristics of the wave gear device. A plant model is constructed from the actuator, and linearized using the exact linearization technique; measurements are taken of non-linear elastic deformation of the wave gear device relative to load torque; the non-linear spring model ?g(?tw) is defined using a cubic polynomial with the constant defined as zero to allow the measurement results to be recreated; and the current input into the model and motor position of the model when a load acceleration command is a command value are entered into a processor arranged as a semi-closed loop control system for controlling positioning of the load shaft, as a feed-forward current command and a feed-forward motor position command.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: April 23, 2013
    Assignees: Harmonic Drive Systems, Inc., National University Corporation Nagoya Institute of Technology
    Inventors: Yoshifumi Okitsu, Yuki Kato, Kozo Sasaki, Makoto Iwasaki
  • Patent number: 8405342
    Abstract: A motor including a stator, a rotor, and a current supply unit. The stator includes a stator core, which has a plurality of teeth, and a plurality of coils, which are wound around the teeth. The rotor includes a plurality of magnets, which function as first magnetic poles, and salient poles, which function as second magnetic poles. Each of the salient poles is arranged between adjacent magnets spaced apart by a clearance from the magnets. When P represents the number of poles in the rotor and S represents the number of coils, a ratio P/S of the pole number P and the coil number S is represented by (4n?2)/3m (where n and m are integers that are greater than or equal to 2). The plurality of coils includes a plurality of coil groups including coils for three phases. The current supply unit executes a different current control for each coil groups.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: March 26, 2013
    Assignee: Asmo Co., Ltd.
    Inventors: Yoji Yamada, Shinji Santo, Seiya Yokoyama, Yoko Tateishi, Yoshiaki Takemoto, Shigemasa Kato
  • Patent number: 8395341
    Abstract: Methods, systems and computer program products for compensating repeatable timing variations associated with a spindle motor are described. Specifically, a repetitive error correction factor may be determined using a computational model which predicts timing variations. The correction factor can then be used to cancel the effect of the actual timing variations upon the spindle motor.
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: March 12, 2013
    Assignee: Marvell International Ltd.
    Inventors: Edward Ying, Pantas Sutardja
  • Publication number: 20130043821
    Abstract: A system for operating an electric machine includes: a rotor position sensor to provide a rotor position indication as a function of a rotor position angular range which indicates the position of a rotor of the electric machine; a control unit designed to associate in each case a commutation angular range, which indicates a certain control state for the stator coils, with one or more of the rotor position indications, so that a change in the commutation angular range is triggered by a change in the rotor position indication, and to change an association scheme of the associations between the rotor position indications and the respective commutation ranges as a function of a predefined rotational direction indication which indicates the desired rotational direction
    Type: Application
    Filed: January 25, 2011
    Publication date: February 21, 2013
    Applicant: ROBERT BOSCH GMBH
    Inventor: Volker Bosch
  • Patent number: 8358096
    Abstract: A linear electro-mechanical actuator comprises a housing with a reversible DC-motor (1), which through a transmission (2) can move an activation element (5) between two end positions. The activation element (5) will in the two end positions cause the electrical end stop switches (17, 25) to be activated for interrupting the current for the DC motor (1) in the end positions of the activation element (5) for running the motor (1) in one direction. Parallel to the end stop switches (17, 25), an extra set of switches (21, 23) are incorporated for determining in which end position the activation element (5) is located.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: January 22, 2013
    Assignee: Linak A/S
    Inventor: Jeppe Bastholm
  • Patent number: 8344679
    Abstract: A method and apparatus are provided to maintain motion control during manual positioning of a patient table. The method and apparatus of the present application control the amount of resistance to manual motion of the patient table without using switches to control the amount of assistance provided during manual positioning. The amount of resistance to manual motion may vary as a function of the velocity and position of the patient table. Further, the resistance to initial manual movement of the patient table may be reduced.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: January 1, 2013
    Assignee: Koninklijke PHilips Electronics N.V.
    Inventor: John Hayes
  • Publication number: 20120319638
    Abstract: An adjustment device in the automotive field, having a fixed guide element and an adjustment element which is movably arranged with respect thereto and which has a referencing element, having an EC motor which drives the adjustment element within an adjustment travel, and having a control unit with an actuator for the EC motor, wherein the adjustment travel is bounded by a first and a second end point which are respectively arranged within a first and a second capture region, wherein at least one mechanical end stop is provided which is arranged outside the adjustment travel.
    Type: Application
    Filed: June 18, 2012
    Publication date: December 20, 2012
    Applicant: Dr. Ing. h.c. F. Porsche Aktiengesellschaft
    Inventors: Bernhard Ritter, Dejan Djordjevic
  • Patent number: 8314580
    Abstract: A DC-motor (46) actuates a highly-reduced reduction gear of an actuating drive for a flap or valve in order to regulate a gas or liquid volume flow, particularly for heating/ventilation/climatization, or fire or room protection. Current flow in the stator coils (A, B, C) is commutated in a program-controlled manner without integrated position sensors. Algorithms enable counting rotations of rotor (54) of the DC-motor (46). Problems related to the principle of motor rotation speed at low rpm are prevented. The DC-motor (46) includes a stator (44) having three stator coils (A, B, C) which extend over 3n stator poles (52), and an annular-shaped permanent magnet rotor (54) having 2m permanent magnet segments with alternating polarity (N, S), a coaxial cup-shaped external rotor (110) and a coaxial drive shaft (108), whereby n and m are whole multiplication factor numbers (1, 2, 3, 4) and are different from each other.
    Type: Grant
    Filed: June 3, 2005
    Date of Patent: November 20, 2012
    Assignee: Belimo Holdings AG
    Inventors: Silvio Grogg, Curdin Stäheli, Martin Ochsenbein
  • Patent number: 8248008
    Abstract: A motor control device includes a measurement unit, a speed control unit, a correction unit, a drive unit, and a disturbance suppressing unit. During a time period before a measurement value of speed of one of a motor and a driven object which is driven by the motor measured by the measurement unit becomes greater than zero the correction unit corrects a manipulated variable such that a reduced correction amount which is from zero percent to less than 100 percent of a correction amount determined by the disturbance suppressing unit, is added to the manipulated variable determined by the speed control unit corresponding to a target speed of the one of the motor and the driven object.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: August 21, 2012
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Kenichi Iesaki
  • Patent number: 8228015
    Abstract: A method for controlling a servomotor for driving a movable part of a machine, the method comprising: determining the coordinates of an acceleration and of a deceleration curve for each stage of a cycle of operation to move said part; determining the maximum number of stages required to complete said cycle; initiating the acceleration curve for the first stage of the cycle of operation; and dynamically correcting the cycle of operation, at at least one intermediate point in the cycle, to initiate the deceleration curve appropriate to the stage, at a predetermined decision point, if production line parameters require a change to the operation cycle.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: July 24, 2012
    Assignee: Neopost Technologies
    Inventor: Christopher Hugh Williams
  • Patent number: 8222852
    Abstract: A motor control device of the present invention includes a correction input unit, a measurement unit, a first signal processing unit, and a second signal processing unit. The correction input unit corrects a control input signal outputted from a controller, and inputs a corrected control input signal into a motor. The measurement unit measures a physical quantity resulting from rotation of the motor corresponding to a control output. The first signal processing unit inputs a measurement signal representing the physical quantity inputted from the measurement unit into an inverse model 1/G of a transfer function G of a controlled object, and filters an output of the inverse model 1/G through a first low-pass filter. The second signal processing unit obtains a corrected control input signal to be inputted into the motor by the correction input unit, and filters the control input signal through a second low-pass filter.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: July 17, 2012
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Kenichi Iesaki
  • Patent number: 8179076
    Abstract: The present invention discloses a chip structure capable of smoothing slope of signal during conversion. And the chip structure is suitable for a DC motor which is embedded in a portable electronic device. The DC motor is for adjusting the focal distance of a digital camera which is installed within the portable electronic device. The chip structure comprises an input terminal, a first converter, a control unit, a second converter, an amplifier circuit and an output terminal. The input terminal is for receiving a first digital signal. The first converter is for converting the first digital signal into an analog signal. The control unit is for elongating the transform time of the analog signal. The amplifier circuit is for amplifying the elongated analog signal. The second converter is for converting the elongated analog signal into a second digital signal. And the output terminal outputs the second digital signal.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: May 15, 2012
    Assignee: dadny, Inc.
    Inventor: Lu-Yueh Hsu
  • Patent number: 8179080
    Abstract: A reciprocating actuator includes at least one element moving reciprocally relative to a rack, a device for driving the moving element in a driving direction, an element for returning the moving element in an opposite direction, at least one sensor for detecting the position of the moving element, and a servocontrol adapted to deliver, for each displacement cycle of the moving element in the driving direction, at least one correction signal (S5) representative of the difference between the energy imparted on the moving element during at least one preceding cycle, and the nominal energy to be imparted on this moving element to displace it exactly to its extreme set-point position, and to adjust on each cycle the control signal of the driving device according to the correction signal (S5).
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: May 15, 2012
    Assignee: Centre National d'Etudes Spatiales (C.N.E.S.)
    Inventors: Jean-Claude Vannier, Amir Arzande, Gerard Jeanblanc, Isabelle Gibek, Denis Schwander
  • Patent number: 8148931
    Abstract: There are included a plurality of actuators, an instruction generator for generating instructions of plural degrees of freedom, a position arithmetic unit for calculating positions of plural degrees of freedom from signals of a plurality of sensors, a control arithmetic unit for calculating operation amounts of plural degrees of freedom from the instructions of plural degrees of freedom and the positions of plural degrees of freedom, a thrust force conversion arithmetic unit for calculating thrust force instructions of the plurality of actuators from the operation amounts of the plural degrees of freedom, a current instruction unit for calculating current instructions which should be flowed to the plurality of actuators, and a sensor configuration input device for selecting a desired sensor configuration from among a plurality of sensor configurations. The positions of plural degrees of freedom are calculated by using a position arithmetic expression corresponding to a selected sensor configuration.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: April 3, 2012
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventor: Takashi Mamba
  • Patent number: 8138706
    Abstract: A safety drive unit (1) with a safety circuit (12) that resets a flap or a valve into a specified safety position for controlling a gas or liquid volumetric flow, in particular in the field of heating, ventilation, and monitoring systems. The safety drive unit (1) comprises an actuator (14) with a controllable electric motor (28), a capacitive energy storage unit (20), and energy converter (22) with a power module, and a power supply (18). During normal operation, the electric current in the power module of the energy converter (22) is converted to a lower voltage and stored in the capacitive energy storage unit. If the voltage drops below a predetermined value or if there is a power failure, the stored electrical charge is converted back to a higher voltage by the same power module, and the electric motor (28) is activated until the specified safety position is reached.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: March 20, 2012
    Assignee: Belimo Holding AG
    Inventors: Martin Ochsenbein, Curdin Stäheli, Roman Furrer
  • Patent number: 8080966
    Abstract: A motor control architecture is provided that simultaneously controls multiple motors. The motor control system includes memory, a plurality of motor control processors, and a communication controller. The motor control processors are each responsive to control signals supplied from the communication controller to selectively retrieve system commands and motor positions from the memory, to generate motor commands, and to supply the generated motor commands to the memory. The communication controller selectively receives system commands and transmits the received system commands to the memory, selectively supplies the command signals to selected ones of the motor control processors, selectively receives motor positions from a plurality of motors, selectively transmits motor positions to the memory, selectively retrieves generated motor commands supplied to the memory, and selectively transmits the retrieved motor commands.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: December 20, 2011
    Assignee: Honeywell International Inc.
    Inventors: Calvin C. Potter, Casey Hanlon, Paul T. Wingett
  • Patent number: 8072168
    Abstract: A reference position detecting apparatus includes an electric motor and a motor control unit. The electric motor includes a plurality of first coils and a plurality of second coils. The electric motor further includes a rotor that rotates when at least one of the plurality of first coils and the plurality of second coils is supplied with electricity. The motor control unit controls electricity supplied to either one of the plurality of first coils and the plurality of second coils to rotate the rotor to a limit position in a movable range of an object.
    Type: Grant
    Filed: November 10, 2009
    Date of Patent: December 6, 2011
    Assignees: Denso Corporation, Nippon Soken, Inc.
    Inventors: Kiyoshi Kimura, Taku Itoh, Shigeru Yoshiyama, Masashi Hori
  • Patent number: 8058831
    Abstract: The invention relates to a control device and a control method which enhance accuracy in detecting a speed of a driven body to stably control drive means. An encoder signal control section (25) compares lengths of time between a rising measurement time kept by a rising edge interval counting section (38) and a rising period of the latest rising edge stored in a rising edge interval history section (39), and then outputs a value of either the rising measurement time or the rising period, whichever is longer based on a comparison result, so that a period of a pulse signal (36) can be accurately predicted and be a real-time approximate, which allows for accurate calculation of the speed of the driven body based on the accurately outputted period of the pulse signal (36), and the accuracy in detecting the speed of the driven body can be enhanced with the result that the drive means can be stably controlled.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: November 15, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Kazutoshi Ishikawa
  • Publication number: 20110223274
    Abstract: A reciprocating apparatus comprises a reciprocating member, a drive mechanism, an input device, a work-switch position calculating unit configured to calculate a work-switch position for the drive mechanism, a direction-switch position calculating unit configured to calculate a direction-switch position, a remaining-distance calculating unit configured to calculate a remaining distance that is a difference between the direction-switch position calculated by the direction-switch position calculating unit and a direction-switch position input at the input device, a target direction-switch position calculating unit configured to add the remaining distance, to the direction-switch position calculated by the direction-switch position calculating unit, thereby to calculate a target direction-switch position, and a corrected position calculating unit configured to calculates a corrected work-switch position for the drive mechanism so that the drive mechanism may cause the reciprocating member to start moving in the
    Type: Application
    Filed: March 10, 2011
    Publication date: September 15, 2011
    Applicant: TOSHIBA KIKAI KABUSHIKI KAISHA
    Inventors: Jun ENOMOTO, Harunobu Inami
  • Publication number: 20110148339
    Abstract: A method of homing motion axes in a radiation system uses a motor and one or more hardstops. A load is driven by a motor to move toward a hardstop during which an electrical parameter of the motor is monitored. A reference position for the motion axis is defined when the monitored electrical parameter reaches or exceeds a determined value. Alternative to monitoring the motor electrical parameter, the motor velocity may be monitored during the motion and a reference position for the motion axis is defined when the monitored motor velocity falls to or below a determined value. Alternatively, the load velocity may be monitored during the motion and a reference position for the motion axis is defined when the monitored load velocity falls to or below a determined value.
    Type: Application
    Filed: December 18, 2009
    Publication date: June 23, 2011
    Applicant: Varian Medical Systems, Inc.
    Inventor: Robert T. Wiggers
  • Patent number: 7965051
    Abstract: A user selectable optional power tinting system. A typical OPTS includes a user selection interface operable to allow a user to select a tinting option from a plurality of tinting options, a panel selection assembly coupled to the user selection interface and operable to engage a window panel corresponding to an option selected by the user selection interface, an actuator motor operable to engage the panel selection assembly when an option is selected from the user selection interface, and a plurality of differently tinted panels operable to be engaged by the panel selection assembly when an option is selected from the user selection interface, each differently tinted panel corresponding to one of the plurality of tinting options.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: June 21, 2011
    Inventors: Wayne Walker, Earnie Lee Walker
  • Publication number: 20110109257
    Abstract: Provided is a low-cost control device for an electric servo press, which is excellent in operability and operation efficiency, capable of abruptly stopping a servomotor in a safe and reliable manner within a short time period in response to an abrupt stop command while avoiding hard actuation of a mechanical brake, reliably and quickly stopping the servomotor even in the case where runaway of the servomotor or the like occurs. An electric servo press performs switching to rotation stop control for a servomotor according to an abrupt stop motion based on an abrupt stop command signal to perform brake actuation so as to cause a mechanical brake to actually start braking and to forcibly interrupt rotational drive power to the servomotor at a scheduled stop time at which the servomotor is stopped according to the abrupt stop motion.
    Type: Application
    Filed: February 8, 2008
    Publication date: May 12, 2011
    Applicant: AIDA ENGINEERING, LTD.
    Inventor: Atsushi Someya
  • Patent number: 7919940
    Abstract: A system for generating a motion profile in real time includes a processor. The processor breaks a move into a first phase and a second phase. The first phase includes commanding the move toward a constant velocity segment, and the second phase includes monitoring the first phase to determine when during a move in progress it is necessary to implement a jerk value required to successfully reach end conditions. The processor also transmits command signals based upon the motion profile and calculates the point at which the second phase must take control of the move in progress to reach a target position. The system further includes at least one input/output module that receives command signals. A method for generating a motion profile in real time is also presented.
    Type: Grant
    Filed: October 21, 2007
    Date of Patent: April 5, 2011
    Assignee: GE Intelligent Platforms, Inc.
    Inventors: Daniel H. Miller, William Lindsay Morrison
  • Patent number: 7898205
    Abstract: A linear feedback positioning module is provided with a coupling and a drive at one side of a platform having a lead screw, a movable assembly combined on the lead screw and a feedback assembly. The feedback assembly includes a magnetic scale cooperating with a read head. The magnetic scale is combined on the platform and located along the lead screw to cooperate with the lead screw. The linear feedback positioning module is further used with a backend control assembly. By such arrangements, the feedback assembly can correct error at any moment to improve the process and product accuracy and increase the production efficiency and product competitiveness.
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: March 1, 2011
    Assignee: Hiwin Mikrosystem Corp.
    Inventor: Don-Hua Cheng
  • Patent number: 7884565
    Abstract: A human-machine interface assembly includes a user interface and a passive force feedback mechanism. The user interface is configured, upon receipt of an input force that exceeds a null breakout force, to move from a null position to a first control position and, upon receipt of an input force that exceeds a soft stop force, to move beyond the first control position. The passive force feedback mechanism is coupled to the user interface and is configured to supply the null breakout force to the user interface when the user interface is in the null position, and supply the soft stop force to the user interface when the user interface is in the first control position. The soft stop force exceeds the null breakout force and is not supplied to the user interface unless the user interface is in the first control position.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: February 8, 2011
    Assignee: Honeywell International Inc.
    Inventors: James I Kern, James Casey Hanlon, Justin A. Tanner