"step-by-step" Motors In Closed-loop Servos Patents (Class 318/685)
  • Patent number: 10873673
    Abstract: An object is to appropriately cope with that power supplied to a power receiving apparatus from an external device is not appropriate. An electronic device that drives by a bus power system and includes a detection unit configured to detect a drop in supply of power by the bus power system and a control unit configured to control the electronic device so that power consumption is reduced in a case where a drop in the supply of power is detected by the detection unit.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: December 22, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Nobutsune Kobayashi
  • Patent number: 10846978
    Abstract: Disclosed are embodiments of a mechanical wheel display assembly including a mechanical rotatable bezel surrounding a mechanical wheel. The mechanical wheel display input assembly is suitable for use in a gaming terminal, a gaming cabinet or a gaming machine. Direction and speed of a manual rotation of the bezel is detected and interpreted. The result may be used to control various aspects of operation of the gaming terminal, gaming cabinet or gaming machine, including providing input for game play. The mechanical wheel may be rotated in real-time to reflect the rotation of the bezel. A motor may be coupled to the rotatable bezel to provide resistance, assistance or operator feedback.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: November 24, 2020
    Assignee: SG Gaming, Inc.
    Inventors: Vernon Bernard, Karl Wudtke, Benjamin E. Isaac
  • Patent number: 10843499
    Abstract: The present invention provides a printer for applying a stamp onto an official document, wherein the printer comprises an access level with an inlet for inserting the document into and removing the document from the printer, a processing level including a print head, and an inter-level document transport system for moving a document receiving platen between the access level and the processing level. The access level and the processing level are at least partly arranged on top of each other. The present invention also provides an imaging system for a printer and a method for processing an official document with a printer.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: November 24, 2020
    Assignee: SICPA HOLDING SA
    Inventors: Mehdi Talwerdi, Winfield Fisher, Bahador Sohrabi, Ion Toma, Vincent Nan
  • Patent number: 10816935
    Abstract: A motor driving apparatus is a pulse generation circuit applying a drive pulse for rotating a rotor to a two stepping motor including the rotor magnetized in two poles and a stator in which a two-phase coil is wound around a yoke. The drive pulse is constituted of a drive pulse P1 and a drive pulse P2. The pulse generation circuit applies the drive pulse P1 having a stable stationary position at which a rotor rotation angle from a reference position is 90 degrees or less and applies the drive pulse P2 having a stable stationary position at which the rotor rotation angle from the reference position is 90 degrees or more continuously to the application of the drive pulse P1.
    Type: Grant
    Filed: July 8, 2019
    Date of Patent: October 27, 2020
    Assignee: SEIKO INSTRUMENTS INC.
    Inventor: Tetsuya Nobe
  • Patent number: 10744653
    Abstract: According to one embodiment, a holding mechanism includes a first holding part, a second holding part, a first guide, a second guide, a third guide, a fourth guide, and a driving mechanism. The second holding part faces the first holding part in a first direction. The first guide is connected to the first holding part and capable of moving the first holding part in the first direction. The second guide is connected to the second holding part and capable of moving the second holding part in the first direction. The third guide is capable of moving the first guide in the first direction. The fourth guide is capable of moving the second guide in the first direction, and aligned with the third guide in the first direction. The drive mechanism changes a distance between the first holding part and the second holding part.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: August 18, 2020
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Junya Tanaka, Atsushi Sugahara
  • Patent number: 10742146
    Abstract: A motor control circuit includes an input voltage measuring unit, a temperature measuring unit, a current setting unit, and a current control unit. The input voltage measuring unit measures an input voltage input to the motor control device. The temperature measuring unit measures the temperature. The current setting unit sets a target value of drive current to flow through a coil of a stepping motor based on a measurement result of the input voltage measuring unit and a measurement result of the temperature measuring unit and based on a set value of drive current preset for each of plural partial areas, which are sectioned in a matrix form with a threshold value related to the input voltage and a threshold value related to the temperature. The current control unit controls the drive current according to the target value of the drive current set in the current setting unit.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: August 11, 2020
    Assignee: MINEBEA MITSUMI INC.
    Inventors: Kazuo Takada, Hidetoshi Hijikata
  • Patent number: 10742147
    Abstract: A motor control circuit includes an input voltage measuring unit, a temperature measuring unit, a speed setting unit, and a speed control unit. The input voltage measuring unit measures an input voltage input to a motor control device. The temperature measuring unit measures the temperature. The speed setting unit sets a target value of driving speed of a stepping motor based on a measurement result of the input voltage measuring unit, a measurement result of the temperature measuring unit and based on a set value of driving speed preset for each of the plural partial areas which are sectioned in a matrix form with a threshold value related to the input voltage and a threshold value related to the temperature. The speed control unit controls the driving speed according to the target value of the driving speed set in the speed setting unit.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: August 11, 2020
    Assignee: MINEBEA MITSUMI INC.
    Inventors: Kazuo Takada, Takayuki Matsui
  • Patent number: 10726662
    Abstract: A brushless motor system for use with a mechanical reel gaming machine is provided. The brushless motor system includes a reel hub and a reel frame rotationally attached to a center shaft of the reel hub. The brushless motor system also includes a permanent magnet (PM) rotor attached to the reel frame and including a plurality of permanent magnets attached to the PM rotor. The brushless motor system further includes a stator including stator coils attached to the reel hub, the plurality of stator coils are mounted parallel to a surface of the PM rotor at a separation distance. The stator causes the PM rotor to rotate during activation of the stator without direct contact between the stator and the rotor, thereby causing the display of one or more symbols of the plurality of symbols during the wagering game based on the rotation.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: July 28, 2020
    Assignee: ARISTOCRAT TECHNOLOGIES AUSTRALIA PTY LIMITED
    Inventors: William Lamb, Thach Du, Charles A. Liter
  • Patent number: 10726663
    Abstract: A brushless motor system for use with a mechanical reel gaming machine is provided. The brushless motor system includes a reel hub and a reel frame rotationally attached to a center shaft of the reel hub. The brushless motor system also includes a permanent magnet (PM) rotor attached to the reel frame and including a plurality of permanent magnets attached to the PM rotor. The brushless motor system further includes a stator including stator coils attached to the reel hub, the plurality of stator coils are mounted parallel to a surface of the PM rotor at a separation distance. The stator causes the PM rotor to rotate during activation of the stator without direct contact between the stator and the rotor, thereby causing the display of one or more symbols of the plurality of symbols during the wagering game based on the rotation.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: July 28, 2020
    Assignee: ARISTOCRAT TECHNOLOGIES AUSTRALIA PTY LIMITED
    Inventors: William Lamb, Thach Du, Charles A. Liter
  • Patent number: 10680472
    Abstract: A stator for an electromagnetic machine includes a first lamination stack defining a first cavity therein and having a central longitudinal axis. The first lamination stack includes a first plurality of mounting ears disposed opposite the first cavity and each spaced apart from one another about the central longitudinal axis. The stator further includes a second lamination stack abutting the first lamination stack and defining a second cavity therein aligned with the first cavity along the central longitudinal axis. The second lamination stack includes a second plurality of mounting ears disposed opposite the second cavity and each spaced apart from the first plurality of mounting ears and from one another about the central longitudinal axis. An electromagnetic machine including the stator and a device including the electromagnetic machine are also described.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: June 9, 2020
    Assignee: GM Global Technology Operations LLC
    Inventors: Pavan Kumar Patruni, Song He, Edward L. Kaiser, Mithun Sunny
  • Patent number: 10644574
    Abstract: An optical sensor for estimating positions of rotors in a motor comprises an optical source (21) and a plurality of photo detectors (22), the motor further has stators and is used for e-machines, the optical source (21) is mounted on the surface of the rotor where the air gap is big enough to not block magnetic flux between the rotors and the stators, the photo detectors (22) are arranged evenly around the stator tooth slots and configured to detect light emitted by the optical source (21) and output parameters which are used to estimate the positions of rotors. The proposed low cost optical sensor measures the angular position of rotating e-machine when sensorless control algorithm is applied but limited by response time at high speed region. The optical sensor only adds small cost and provides rotor position information with enough accuracy for FOC control at high rotational speed. A method for estimating positions of rotors in a motor and a motor comprising the optical sensor are also provided.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: May 5, 2020
    Assignee: Robert Bosch GmbH
    Inventors: Alexander Boronka, Xiaoyun Zang
  • Patent number: 10637378
    Abstract: An actuating apparatus for a polyphase motor includes five phase terminals for connecting of in each case one phase of the polyphase motor, a high terminal for applying a supply voltage (UB), a low terminal for applying a reference potential of the supply voltage (UB), a control device, wherein the control device is adapted, in four of the five phase terminals, to impress a pulse-width-modulated voltage pattern by connecting the phase terminals to the high terminal or the low terminal so that in the first phase terminal, an evaluation signal which is dependent on the angle of rotation of the polyphase motor is produced, and wherein the control device is adapted to determine the angle of rotation and/or a commutation condition of the polyphase motor from the evaluation signal.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: April 28, 2020
    Assignees: Airbus Defence and Space GmbH, Airbus Operations GmbH
    Inventors: Joerg Wangemann, Heiko Rothkranz, Jens Schult
  • Patent number: 10615732
    Abstract: The invention is a method for generating a control signal (Sc) by pulse modulation according to a reference signal (Sref), the method comprising forming successive modulation sequences, each sequence comprising a transition between a low state and a high state or vice versa, the method comprising the following iterative steps, each iteration being associated with an instant, referred to as the current instant: a) calculating a time derivative (S?ref(t)) of the reference signal at the current instant (t); b) according to the derivative of the reference signal (S?ref(t)), selecting, when the derivative is positive, a sequence (M(t)) comprising a high state preceded by a low state, the high state extending up to the end of the modulation sequence; when the derivative is negative, a sequence (M(t)), comprising a high state followed by a low state, the low state extending up to the end of the modulation sequence; the low state and the high state extending over a low state duration (Tlow(t)) and a high state
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: April 7, 2020
    Assignee: Commissariat a l'energie atomique et aux energies alternatives
    Inventors: Leandro Cassarino, Ghislain Despesse
  • Patent number: 10573119
    Abstract: A brushless motor system for use with a mechanical reel gaming machine is provided. The brushless motor system includes a reel hub and a reel frame rotationally attached to a center shaft of the reel hub. The brushless motor system also includes a permanent magnet (PM) rotor attached to the reel frame and including a plurality of permanent magnets attached to the PM rotor. The brushless motor system further includes a stator including stator coils attached to the reel hub, the plurality of stator coils are mounted parallel to a surface of the PM rotor at a separation distance. The stator causes the PM rotor to rotate during activation of the stator without direct contact between the stator and the rotor, thereby causing the display of one or more symbols of the plurality of symbols during the wagering game based on the rotation.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: February 25, 2020
    Assignee: ARISTOCRAT TECHNOLOGIES AUSTRALIA PTY LIMITED
    Inventors: William Lamb, Thach Du, Charles A. Liter
  • Patent number: 10566887
    Abstract: An apparatus for rotating a shaft by using an electromagnet is provided. Permanent magnets are placed around a shaft to rotate with the shaft, and an electromagnet is placed outside the circumference of the permanent magnets, and a device for activating electromagnet is placed. Two secondary cell batteries are used to activate the electromagnet and the electromagnet makes the permanent magnets rotate. The secondary cell batteries are charged using back-emf which occurs in the electromagnet. Coils are placed around the circumference of the permanent magnets and the rotating permanent magnets generate electricity to the coils.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: February 18, 2020
    Inventor: Jei Hyun Goo
  • Patent number: 10523212
    Abstract: A semiconductor device may include an input control circuit, a counting circuit, an output control circuit, and a counting operation control circuit. The input control circuit may output a counting input signal based on an input signal and a counting over signal. The counting circuit may generate a preliminary counting code based on the counting input signal. The output control circuit may generate a counting code based on the preliminary counting code. The counting operation control circuit may generate the counting over signal based on a part of the counting code.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: December 31, 2019
    Assignee: SK hynix Inc.
    Inventor: Kyu Dong Hwang
  • Patent number: 10507490
    Abstract: A light-curing oven (1; 100) comprising: a light-curing chamber (2) configured to contain one or more objects (A) to be light-cured; a source (3) of light-curing rays arranged inside the light-curing chamber (2); a vacuum pump (4) with a suction duct (5) communicating with the light-curing chamber (2) and a motorized structure (6; 106) for moving the objects (A) during the light-curing process. The motorized structure (6; 106) may comprise an electric motor (7; 107) with a drive shaft (8) mechanically associated with a support plate (9) for supporting the objects (A) to be light-cured. The electric motor (7; 107) and the drive shaft (8) being configured in such a way that they define for the objects (A) a horizontal rotation axis (X). The motorized structure (6; 106) may also comprise piezoelectric transducers (10; 110) for making the objects (A) vibrate during their rotation.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: December 17, 2019
    Assignee: DWS S.R.L.
    Inventor: Sergio Zenere
  • Patent number: 10511245
    Abstract: A method for controlling the drive current in a stepper motor includes measuring stepper motor current, computing a load angle of the stepper motor, calculating a torque ratio of the stepper motor, generating a reference current as a function of the torque ratio and a maximum current setting for the stepper motor, and setting the drive current of the stepper motor as a function of the reference current.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: December 17, 2019
    Assignee: Microsemi SoC Corp.
    Inventors: Battu Prakash Reddy, Ashwin Murali
  • Patent number: 10498270
    Abstract: A control device for a stepping motor gradually increases an absolute value of the excitation current in phase A from when the start until the end of the hold period such that the amount of change in the excitation current per unit time is smaller than or equal to a first predetermined value. From the start of the hold period until a predetermined time elapses, an absolute value of the excitation current in phase B gradually increases such that the amount of change in the excitation current per unit time is smaller than or equal to the first predetermined value. By the end of the hold period after the predetermined time has elapsed, the excitation current in phase B reaches zero. When the hold period ends, one-phase excitation operation starts and the excitation current flows in phase A first with the same polarity as at the end of the hold period.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: December 3, 2019
    Assignee: MINEBEA MITSUMI INC.
    Inventors: Koichi Takeda, Kazuo Takada, Shigeki Miyaji, Kei Yamazaki
  • Patent number: 10498263
    Abstract: A control device for a linear motor includes a speed controller that calculates a current command value by an integration operation using a first integral value of a difference between a moving speed of a movable element provided in the linear motor and a speed command value calculated on the basis of a position command value, a current controller that applies a voltage to the linear motor on the basis of the current command value, and a correction value storage unit that stores the first integral value of the speed controller when the movable element remains at a position indicated by the position command value. When resuming control of the linear motor, the speed controller sets the first integral value stored in the correction value storage unit as an initial value for the integration operation before the brake controller turns off the brake device.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: December 3, 2019
    Assignee: THK CO., LTD.
    Inventors: Yuki Nomura, Takeo Karaushi, Hideya Nakayama, Tsuyoshi Inda
  • Patent number: 10491150
    Abstract: A generator or motor system for converting mechanical power into electrical power or vice versa, comprises: a switched reluctance machine having a rotor and a stator with a number of phase windings, the phase windings being partitioned in groups, each group comprising at least two phase windings connected in series to form a ring structure; a power electronics circuit comprising: for each ring structure, an independently controllable means for generating a circulating current in said ring structure; a number of legs, each of the legs comprising at least two diodes or switches connected in series between a first and a second voltage rail, each leg having an intermediate node located between the two diodes or switches, and connected to a corresponding intermediate node between two phase windings of a ring structure.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: November 26, 2019
    Assignee: UNIVERSITEIT GENT
    Inventor: Alex Van Den Bossche
  • Patent number: 10469010
    Abstract: A motor drive controller capable of taking measures against vibration or noise of a motor is provided. The motor drive controller configured to drive a stepping motor in microstepping mode controls the number of PWM (Pulse Width Modulation) cycles contained in one microstep cycle. More specifically, the number of PWM cycles contained in one microstep cycle is controlled so that a vibration contained in a current waveform determined by the number of PWM cycles contained in one microstep cycle does not approximate the natural frequency of the stepping motor.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: November 5, 2019
    Assignee: MINEBEA MITSUMI INC.
    Inventors: Tetsuya Seki, Kei Yamazaki
  • Patent number: 10461676
    Abstract: A Method for detecting stalling of an electric stepper motor (18), with the following steps is shown: a) samples of the voltage at a coil of the stepper motor (18) are taken continuously or in regular intervals, b) a deviation value is determined corresponding to the deviation between the measured voltages of the two samples, and c) the deviation value is used to determine whether the electric motor (18) is stalling. Further, a stepper motor and a heating, ventilation and/or air conditioning system is shown.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: October 29, 2019
    Assignee: VALEO KLIMASYSTEME GMBH
    Inventors: Philippe Guyon, Daniel Garcia, Ralf Jahnig, Markus Luig
  • Patent number: 10382032
    Abstract: Modulating a gate drive current supplied to an output drive switch coupled to an electric motor by performing at least the following: obtain a gate drive current modulation profile, supply, based on the gate drive current modulation profile, a first gate drive current level as the gate drive current when the output drive switch is operating within a first region, drop the first gate drive current level to a second gate drive current level when the output drive switch transitions from the first region to operating within a Miller region, increase the second gate drive current level to a third gate drive current level within the Miller region, and set the gate drive current to a fourth gate drive current level when the output drive switch transitions from the Miller region to operating within a third region.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: August 13, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Rajarshi Mukhopadhyay, Sooping Saw, Anuj Jain
  • Patent number: 10369822
    Abstract: A printer includes a motor power supply line connecting a carriage motor with a power source, a sensor power supply line connecting a rotary encoder with the power source, a circuit breaker provided on the motor power supply line and interrupting electrical power if a cover sensor detects that a front cover is open and permit connection if the cover sensor detects that the front cover is closed, and a controller controlling the carriage motor and a recording head based on a position of a carriage detected by the rotary encoder.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: August 6, 2019
    Assignee: ROLAND DG CORPORATION
    Inventors: Shinya Yamamoto, Masakazu Igarashi, Kiyomasa Imaizumi, Takeshi Nakanishi
  • Patent number: 10317847
    Abstract: An electronic timepiece includes: a latch unit that latches and outputs specification data designating a specification in accordance with a latch signal; a signal output unit that outputs one of a plurality of driving signals including driving pulses at different periods based on the specification data output from the latch unit; a driving unit that drives a motor based on the driving signal output from the signal output unit; and a control unit that generates the latch signal so that the latch signal has at least an active level at a timing before generation of each driving pulse in the driving signal with a shortest period of the driving pulse among the plurality of driving signals.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: June 11, 2019
    Assignee: Seiko Epson Corporation
    Inventor: Akira Shirao
  • Patent number: 10314968
    Abstract: This invention relates to an injection device for delivering a medicament to the human or animal body, in particular, but not exclusively, to a device having a replaceable medicament cartridge, including an auto-injector, wherein the injector device comprises: a housing; a piston rod for driving a bung of a medicament container; a drive mechanism including a motor for providing an output drive to the piston rod for delivering the medicament; and control means for controlling operation of the device.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: June 11, 2019
    Assignee: Sanofi-Aventis Deutschland GmbH
    Inventors: Ulrich Brüggemann, Scott Preece, Christopher Langley
  • Patent number: 10281273
    Abstract: Provided is a sensing system (1) in which a desired trajectory determining section (32) determines a first desired trajectory th(t) (where t<t1) whose first derivative is continuous, a second desired trajectory th(t) (where t2?t<t3) whose first derivative is continuous, a third desired trajectory th(t) (where t1?t<t2) configured with a common tangent line to the first and second desired trajectories, and a fourth desired trajectory th(t) (where t35?t<t4) configured with a common tangent line to the second desired trajectory in the current-time cycle and a first desired trajectory in a next-time cycle. A drive mechanism controlling section (33) controls an operation of the drive mechanism so as to track the desired trajectories.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: May 7, 2019
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Takumi Kamioka, Kenta Tanaka
  • Patent number: 10243493
    Abstract: A pulse generation unit is configured to output pulse signals for driving the stepping motor. A control unit is configured to perform acceleration control or deceleration control of the stepping motor via the pulse generation unit. The control unit is configured to calculate a number of the pulse signals to be output from the pulse generation unit to the stepping motor when accelerating or decelerating the stepping motor at constant acceleration in the acceleration control or the deceleration control based on an initial speed of the stepping motor when the acceleration control or the deceleration control starts, a target rotation speed, and time from start control of the stepping motor to time when the stepping motor reaches the target rotation speed, and change a rotation speed of the stepping motor in the acceleration control or the deceleration control along a sinusoidal waveform.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: March 26, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Shoji Takeda
  • Patent number: 10228662
    Abstract: An electronic timepiece includes a turnable hand and a processor that controls a turn of the hand. When the processor performs a rapid shift of the hand to a set target position, the processor performs a control of a damping of reciprocation of the hand in which the hand performs a predetermined reciprocation about the target position as a reference position and gradually decreases an amplitude of the reciprocation thereof during the rapid shift.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: March 12, 2019
    Assignee: CASIO COMPUTER CO., LTD.
    Inventors: Hiroshi Morohoshi, Takeshi Miyake, Tatsuyoshi Omura
  • Patent number: 10193478
    Abstract: A motor driving device and driving method of the same used to surely suppress the influence of counter electromotive force is provided. The motor driving device 100 includes an auto-decay portion 141. The auto-decay portion 141 controls a path of a electric current flow in a motor coil when supplying the electric current and when decaying the electric current. The influence of counter electromotive force generated in a stepping motor 200 can be suppressed by the auto-decay portion 141 configured to control so that a ratio or an decay time of a slow decay mode and a fast decay mode of previous cycle is different from a ratio or an decay time of the slow decay mode and the fast decay mode of current cycle.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: January 29, 2019
    Assignee: Rohm Co., Ltd.
    Inventors: Hiroki Hashimoto, Ryoichi Inoue
  • Patent number: 10174701
    Abstract: A method for detecting the commencement of opening of the nozzle needle of an injector of an injection system. In the detection method, the coil of the solenoid injector has a voltage applied to it which is so low that the armature is moved toward the nozzle needle at such a low speed that the abutment causes a stoppage of the armature movement, without the nozzle needle being opened. In this case, the idle travel is overcome, but no injection process is initiated. The abutment of the armature against the nozzle needle is detected, in the current profile, as the commencement of opening of the nozzle needle.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: January 8, 2019
    Assignee: Continental Automotive GmbH
    Inventors: Frank Denk, Nikolay Belyaev, Christian Hauser, Anatoliy Lyubar, Gerd Roesel, Markus Stutika
  • Patent number: 10171017
    Abstract: An image forming apparatus may include an engine portion used to perform an image forming job, a step motor configured to start the engine portion, a driver including a resistor that measures current that flows to a coil of the step motor and is configured to provide a predetermined constant current to the step motor, and a drive controller configured to measure a load level of the step motor based on a voltage value of the resistor and to control the driver to provide the constant current that corresponds to the measured load level.
    Type: Grant
    Filed: February 11, 2014
    Date of Patent: January 1, 2019
    Assignee: HP PRINTING KOREA CO., LTD.
    Inventors: Yong-ho You, Hak-young Kim, Ji-young Byun, Sang-hyuk Jung, Ho-bin Hwang
  • Patent number: 10141873
    Abstract: The present invention concerns an electronic device comprising a calculation unit capable of generating a signal representative of a physical magnitude, for a motor driving a display device, said motor comprising a rotor in a magnetic circuit, two terminals, one positive and one negative, via which the calculation unit controls the motor, the electronic device further comprising at least one shock detector circuit connected between the calculation unit and a motor terminal for the detection of an external shock applied to the motor, said motor having a first position of stable equilibrium placed at a reference angular position and a second position of stable equilibrium placed at 180° from the first stable angular position, for each direction of rotation, a maximum angular position from which it is no longer possible to return the motor rotor into a prior angular position, the calculation unit using an algorithm which, following a shock, can detect the direction of rotation of the rotor by analyzing an induc
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: November 27, 2018
    Assignee: ETA SA Manufacture Horlogère Suisse
    Inventors: Francois Klopfenstein, Joerg Berthoud, Nicolas Jeannet, Yves Godat, Thierry Bonnet
  • Patent number: 10110148
    Abstract: A stepping motor control device is provided with a stopping position determination section and a drive control section. The stopping position determination section determines whether a mover stopping position during the holding state is a stabilized phase or a semistable phase. When it is determined that the mover stopping position is a semistable phase during the holding state by the stopping position determination section, and the control state of the stepping motor transitions from the holding state to the standby state in which the holding of the mover is released due to a trigger signal from a device or the holding state persisting for a fixed time, the drive control section changes the mover stopping position to one of the stabilized phases adjacent to the mover stopping position during the holding state.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: October 23, 2018
    Assignee: FUJI CORPORATION
    Inventors: Daisuke Nakamura, Akira Hara, Satoshi Osaki
  • Patent number: 10084307
    Abstract: The disclosure provides an over-current protection circuit. A signal generating block in the over-current protection circuit generates one or more input voltages, a summed voltage and an average voltage in response to one or more differential voltages. A control block generates one or more control signals in response to the one or more input voltages and the average voltage. An analog control loop block generates an initiation signal in response to the summed voltage and an output voltage. A phase control logic block generates one or more PWM (pulse width modulated) signals in response to the initiation signal and the one or more control signals.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: September 25, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Pradeep V S R Pydah, Biranchinath Sahu, Tetsuo Tateishi, Kuang-Yao Cheng, Nandakishore Raimar
  • Patent number: 10075113
    Abstract: A method and a circuit arrangement is described by means of which a stepper motor can be operated by an adaptive control over a large rotational speed range, including a standstill, in which the motor is electrically fixed in a specific rotational position, and with high precision and running smoothness corresponding to a specified motor current course. This is achieved essentially by the fact that the motor is operated in a low rotational speed range including a standstill with a voltage-controlled or voltage-regulated first operating mode and in a higher or high rotational speed range with a current-controlled second operating mode.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: September 11, 2018
    Assignee: TRINAMIC MOTION CONTROL GMBH & CO. KG
    Inventor: Bernhard Dwersteg
  • Patent number: 10069489
    Abstract: The disclosure discloses a multiplexer based frequency extender comprising a preamplifier to receive a RF input signal and output a pre-amplified RF signal, at least one frequency multiplier or at least one frequency divider, and a multiplexer. The multiplexer comprises multiple differential pairs, each differential pair comprises a corresponding bias current control circuit that switches ON or OFF a bias current flowing through a corresponding differential pair. The at least one frequency multiplier or the at least one frequency divider receives the pre-amplified RF signal and outputs a frequency-multiplied RF signal or a frequency-divided signal. The multiplexer couples to receive the pre-amplified RF signal, the frequency-multiplied RF signal and/or the frequency-divided signal, the multiplexer selects a signal from the received signals and outputs based on the selected signal a multiplexer output signal.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: September 4, 2018
    Inventor: Cemin Zhang
  • Patent number: 10063170
    Abstract: In a described example an apparatus includes: an FET driver circuit configured to supply current to a coil in a stepper motor, the FET driver circuit configured to regulate the current to the coil using a fixed delta current; a current chopper pulse width modulated circuit coupled to the FET driver circuit configured to supply pulses corresponding to a step control signal and a direction control signal; a back electromotive force (BEMF) monitor coupled to the current chopper circuit configured to measure an off time pulse and to output a BEMF monitor signal; and a controller coupled to the current chopper pulse width modulated circuit to supply the step and direction control signals and coupled to receive the BEMF monitor signal.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: August 28, 2018
    Assignee: Texas Instruments Incorporated
    Inventors: Sooping Saw, Rakesh Raja, Anuj Jain, Matthew Hein
  • Patent number: 10012956
    Abstract: A drive device includes a first hand, a second hand, and a control unit that controls a movement operation of the second hand. The control unit starts movement of the second hand in a period after start of movement of the first hand before stop of the movement of the first hand. The control unit controls the movement operation of the second hand according to a decrease in a movement speed of the first hand.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: July 3, 2018
    Assignee: CASIO COMPUTER CO., LTD.
    Inventors: Mototaka Minakuchi, Noriyuki Kitta
  • Patent number: 10008901
    Abstract: Disclosed herein is a step motor. The step motor includes a casing, a stator disposed in the casing, with a coil being wound around the stator, a rotor disposed in the stator, having a rotor shaft that is rotatably supported at both ends of the casing, and rotated by interaction with the stator, a rotary sensing unit provided in the casing to detect a rotation of the rotor, and a coil connector formed on an outer surface of the stator, with an end of the coil being connected to the coil connector.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: June 26, 2018
    Assignee: MOATECH CO., LTD.
    Inventors: Woo-Seok Yeo, Seong-Kwan Oh, Hyun-Ki Yang, Hong-Min Jang
  • Patent number: 9983047
    Abstract: A system and method for monitoring a level of material in a storage bin, including a gear train, a gear train shaft rotatably coupled to the gear train, a drive shaft, a coupling system to couple the gear train shaft to the drive shaft, a paddle coupled to the drive shaft to rotate in unison therewith, the paddle configured to engage a material in the storage bin when the level of material reaches a threshold level, and a stepper motor. A controller may be communicatively coupled to the stepper motor wherein the controller is configured to monitor the running state and the stall state of the stepper motor.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: May 29, 2018
    Assignee: VENTURE MEASUREMENT COMPANY, LLC
    Inventors: Michael Starinki, Christopher Hampton, Brian Jamieson
  • Patent number: 9979330
    Abstract: A three-phase motor control apparatus includes a monitor unit, a three-phase synthesis unit, and a feedback unit. The monitor unit generates monitor voltages derived from output voltages of output transistors having terminals electrically connected to drive coils of respective phases of a three-phase motor. The three-phase synthesis unit converts the monitor voltages into currents and generates a combined current therefrom. The feedback unit generates a feedback signal based on the combined current and feeds the feedback signal back to an output controller that generate control signals for the output transistors based on the feedback signal.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: May 22, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Tamotsu Ito
  • Patent number: 9964732
    Abstract: Various embodiments of the present technology may comprise a method and apparatus for actuator control. The methods and apparatus may comprise various digital signal processing functions to detect a back EMF (electromotive force) and compute a countermeasure value to reduce ringing. The methods and apparatus for actuator control may apply a drive signal corresponding to the countermeasure value. The magnitude and direction of the drive signal provided at particular times during operation may facilitate a shorter settling time.
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: May 8, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Yoshihisa Tabuchi
  • Patent number: 9952259
    Abstract: An apparatus and method for determining initial rotor position in a stationary state of an electric machine.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: April 24, 2018
    Assignee: Infineon Technologies AG
    Inventor: Shi Nian Li
  • Patent number: 9859827
    Abstract: A control device is a control device (1) configured to be switched between open control and servo control and control a stepping motor (3), and includes a control unit (11) configured to reduce a switching frequency to the servo control, to be switched to open control after being switched to servo control to stop a mover at a target position and determine a current supplied to the stepping motor (3) in the open control based on a current command value when the mover is stopped at the target position in the servo control when a deviation between a position of the mover and the target position is a predetermined threshold or more when control of stopping the mover of the stepping motor (3) at the target position through the open control is performed.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: January 2, 2018
    Assignee: THK CO., LTD.
    Inventors: Takeo Karaushi, Yuki Nomura
  • Patent number: 9790870
    Abstract: A method and device for processing a signal (CRK) provided by a bidirectional sensor, the method includes the following steps: generation of a first signal (CRK_CNT) utilizing all the slots of the signal provided by the sensor, generation of a second signal (CRK_FW) utilizing the slots corresponding to a first direction of transit, generation of a third signal (CRK_BW) utilizing the slots corresponding to a second direction of transit, connection of the first signal to the input of the first electronic component, connection of the second and third signals to a second component, detection by the second component of edges of the signals received, change of the value of the predefined threshold (THMI) in the first component upon each detection of an edge.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: October 17, 2017
    Assignees: CONTINENTAL AUTOMOTIVE FRANCE, CONTINENTAL AUTOMOTIVE GMBH
    Inventor: Jerome Hou
  • Patent number: 9791466
    Abstract: An apparatus includes a pick head configured to transfer sample containers to and from a sample group holder, at least one sensor connected to the pick head and configured to detect at least one predetermined feature of the sample group holder, and a controller configured to receive a detection signal from the at least one sensor corresponding to detection of the at least one predetermined feature, determine a change in a predetermined characteristic of the sample group holder based on a detected position of the at least one predetermined feature, and determine a location of one or more samples in the sample group holder to allow for the transfer of the one or more sample containers to and from the sample group holder based on the edge detection signal.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: October 17, 2017
    Assignee: Brooks Automation, Inc.
    Inventor: Robert K. Neeper
  • Patent number: 9748880
    Abstract: A motor control unit having a motor structure that rotates a rotor by voltage excitation includes a photo interrupter, a slit rotation plate, a comparator, and an encoder circuit in order to obtain a position detection signal corresponding to a rotational phase of an output shaft. During a period of time from the motor stopping to the change of the output of an encoder circuit after the supply of a drive voltage waveform, a CPU supplies a drive voltage waveform that is advanced by an advance angle amount that has been set in advance to the motor, and after the change of the output of the encoder circuit, a drive signal by which the advance angle amount is controlled based on the output of the encoder circuit is supplied to the motor.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: August 29, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yoshihiro Mizuo
  • Patent number: 9719807
    Abstract: In a method of determining a current position of an output element connected to an electric stepper motor, a current position of a rotor of the stepper motor is determined by a rotor position sensor. The determination of the current position of the rotor is refined as a function of information about a currently active phase of the stepper motor, and the current position of the output element is calculated in response to the refined determination of the current position of the rotor.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: August 1, 2017
    Assignee: AUDI AG
    Inventor: Jan Oberthür