Plural Mode Control (e.g., Open And Closed Loop, Starting And Braking, Plural-phase And Single-phase Operation, Open And Closed Loop, Etc.) Patents (Class 318/400.09)
  • Patent number: 10439528
    Abstract: An actuation system is proposed for an optical system, comprising a voice coil motor for actuating the optical system, the voice coil motor comprising a magnet and an electric coil, a position measuring unit for measuring the position of the electric coil and providing a position feedback signal, and a control unit for closed loop control of the position of the optical system based on a target position and the position feedback signal, used for generating a drive signal for the electric coil. According to the disclosure, a ferromagnetic element is arranged in proximity to the electric coil so that the inductance of the electric coil depends on its position. Further, the position-measuring unit measures the inductance of the electric coil and determines the position of the electric coil based on the determined inductance.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: October 8, 2019
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Horst Knoedgen, Horst Schleifer
  • Patent number: 10432114
    Abstract: A brushless direct current electric motor for a wiping system. The brushless direct current electric motor includes a rotor, a stator, a Hall effect sensor to detect control magnet angular position of the rotor, and a control unit to determine rotor angular positions in relation to the stator from the signals Hall effect sensor signals and to generate control signals to electromagnetic excitation coils of the rotor as a function of the determined angular position of the rotor. The control unit includes a clock configured to: estimate the angular position of the rotor at predetermined instants lying between two changes of state of the Hall effect sensor, determine values of the control voltages associated with the angular positions of the rotor estimated for the predetermined instants, and generate a substantially sinusoidal control signal from the determined voltage values.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: October 1, 2019
    Assignee: Valeo Systèmes d'Essuyage
    Inventor: Jose-Luis Herrada
  • Patent number: 10432079
    Abstract: A brushless direct current (BLDC) motor that generates electrical energy (AC voltage) while operating as a motor. The motor is configured with a dual purpose stator assembly wherein one segment of the stator assembly includes coil windings to produce the rotary force (torque) in the rotor and the other segment of the stator assembly includes coil windings to generate electrical energy. The stator windings for producing torque are electrically connected through commutation control circuitry to a DC supply source, and the stator windings for generating electrical energy are connected to a load or to an energy storage system. Thus, the embodiment offers a novel means for generating electrical energy in the conventional BLDC motors. Because the motor can generate electrical energy while operating as a motor, it can effectively serve as a powertrain in electric vehicles, whereby the electrical energy it generates can be used to extend the vehicles' drive range.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: October 1, 2019
    Inventor: Thou M. Ny
  • Patent number: 10399452
    Abstract: A hybrid electric vehicle having one or more controllers, voltage-current sensors, and batteries, which are configured to generate and respond to power signals that communicate vehicle operating and start-up conditions, among other parameters and data. The components also are enabled to detect vehicle and battery conditions that include an open circuit voltage (OCV), current, differentiated current (DFC), and near zero current (NZC). The controller(s) are further configured to generate a predicted battery state of charge (SoC) from a combination of the OCV, current, DFC, NZC, and other parameters, which are calibrated according to respective magnitudes and noise calibration factors, which enables the controller(s) to charge and discharge the battery according to the predicted SoC.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: September 3, 2019
    Assignee: Ford Global Technologies, LLC
    Inventor: Xu Wang
  • Patent number: 10368902
    Abstract: A tissue-removing catheter includes a sensor configured to detect a parameter of the catheter during the cutting operation of the catheter when a tissue-removing element is in a tissue-removing position. A locking control circuit is in electrical communication with the sensor and a locking device. During an operational control function, the locking control circuit receives a signal from the sensor based at least in part on the parameter of the catheter detected during the cutting operation of the catheter. The locking control circuit determines whether the received signal is indicative of a tissue-removing element engaging a non-tissue obstruction. The locking control circuit configures the locking device in its locked configuration to inhibit movement of the tissue-removing element from its tissue-removing position to its neutral position if the received signal is indicative of the tissue-removing element engaging a non-tissue obstruction.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: August 6, 2019
    Assignee: Covidien LP
    Inventors: Jason Kessler, Benjamin Fruland, Bryan Ladd, Cassandra Nigh
  • Patent number: 10348232
    Abstract: A motor system with a current sensorless control includes a motor, a drive module, and a motor control module. The motor control module controls the motor to rotate through the drive module. The motor control module includes a command generation module, a command conversion module, and an angle generation module. The command generation module generates speed information and transmits the speed information to the angle generation module, and the command generation module generates a voltage command and transmits the voltage command to the command conversion module. The angle generation module generates an electrical angle. The command conversion module converts the voltage command and the electrical angle into a control signal. The motor control module adjusts a phase of a motor input voltage to meet a phase of a motor input current according to the control signal.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: July 9, 2019
    Inventors: Chih-Hung Hsiao, Yu-Wei Lee, Wei-Shuo Tseng
  • Patent number: 10333398
    Abstract: There is a disadvantage that a loss generated in a charging apparatus becomes large. It is determined whether a link voltage Vo is equal to or higher than a predetermined value Va. If the link voltage Vo is less than the predetermined value Va, a control unit activates a DC-DC converter in a boosting operation. That is, by turning on/off the switching element, the voltage boosted from the storage battery is supplied to the link voltage Vo. The control unit determines whether the link voltage Vo is equal to or higher than the predetermined value Va. If the link voltage Vo is less than the predetermined value Va, the operation is continued. When the link voltage Vo rises due to the boosting operation of the DC-DC converter and becomes equal to or higher than the predetermined value Va, the boosting operation of the DC-DC converter is stopped.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: June 25, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Naoya Takahashi, Hiroyuki Shoji, Takae Shimada
  • Patent number: 10236813
    Abstract: The invention relates to a method for detecting a control method of an inverter (11) for supplying current to an electric machine (1), in particular a synchronous machine, having N phases. The method comprises sensing a control signal (CU, DU, CV, DV, CW, DW), which is fed to the inverter and which is clocked with a periodic cycle, over a specified number of periodic cycles of the control signal; determining a duty cycle frequency for the sensed control signal over the specified number of periodic cycles; and detecting the control method on the basis of the determined duty cycle frequency. The invention further relates to a device (5) designed to perform the method. In addition, the invention further relates a use of the method or of the device to monitor a torque of the electric machine and in particular to estimate an operating-point-dependent power loss of the electric machine according to the detected control method.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: March 19, 2019
    Assignee: Robert Bosch GmbH
    Inventor: Sevan Tatiyosyan
  • Patent number: 10196085
    Abstract: In an electric power steering device assisted by a brushless motor, an induced voltage from a brushless motor is detected when a main power supply is off. The motor is determined to be in a high rpm state when the induced voltage is in a first transient state from a voltage?a high rpm detection threshold Th1 to a voltage?Th1, thereby setting an intermittent excitation cycle of a revolution angle sensor connected to the motor to a short cycle. The motor is determined to be in a low rpm state when the induced voltage becomes a voltage?a high rpm detection threshold Th2 after a wait period corresponding to an electrical angle between peaks or valleys of an output voltage has elapsed in a second transient state from a voltage?Th1 to a voltage?Th2, thereby setting the cycle to a long cycle.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: February 5, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hajime Iida, Hiroshi Gokan, Kenji Ogawa
  • Patent number: 10158312
    Abstract: A motor control apparatus includes: a booster circuit electrically connected to a battery; and an inverter electrically connected to the booster circuit at one end and electrically connected to a motor at another end. The motor control apparatus is provided with a controller configured to control the inverter to output square wave voltage to the motor, thereby driving the motor. The controller is configured to control the inverter to temporarily invert voltage polarity associated with the square wave voltage, on the basis of a phase difference between a voltage command associated with the motor and an electric current associated with the motor, on condition that an operating point of the motor is in a resonance region, which is an operation area in which resonance is generated in the booster circuit.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: December 18, 2018
    Inventors: Wanleng Ang, Masaki Okamura
  • Patent number: 10158315
    Abstract: This invention is concerning a controller for an AC rotating machine, this controller having an estimated sum current computing unit configured to output, as estimated sum current, a sum of current of a first winding and current of a second winding when it is determined that the current of the first winding can be detected, and maintain the estimated sum current which has been outputted as a previous value when it is determined that the current of the first winding cannot be detected. When it is determined that the current of the first winding cannot be detected, a first voltage command for the first winding is computed based on an estimated current value of the first winding, which has been calculated by subtracting the current of the second winding detected by the second current detector, from the estimated sum current output from the estimated sum current computing unit.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: December 18, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akira Furukawa, Tatsuya Mori
  • Patent number: 10148210
    Abstract: Methods and systems of optimizing efficiency of a motor drive or generator are provided. The methods include measuring data corresponding to input power and output power of a motor drive or generator at a control parameter and different load values. The methods include generating a three-dimensional surface model based on the measured data. The three-dimensional surface model can estimate an efficiency of the motor drive or generator at the control parameter and at unmeasured load values. The methods can include determining optimal efficiency of the motor drive or generator at the different load values and the unmeasured load values based on the three-dimensional surface model.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: December 4, 2018
    Assignee: University of Connecticut
    Inventors: Ali Bazzi, Artur Ulatowski, Yiqi Liu
  • Patent number: 10148209
    Abstract: A method, implemented in one or more controllers in a vehicle, includes, in a presence of a propulsive demand of the vehicle that is driven by an engine and an electric machine, holding electric machine current at a predetermined magnitude and sweeping an angle, defined between a reference current and a reference Iq component, through a predetermined range. The method further includes operating the electric machine thereafter according to a resolver offset derived from a value of the angle corresponding to an Iq component crossing zero.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: December 4, 2018
    Assignee: Ford Global Technologies, LLC
    Inventors: William David Treharne, Jonathan Andrew Butcher, Xuemei Sun
  • Patent number: 10133223
    Abstract: An angle estimator includes correction means for correcting a phase of an error parameter to obtain a corrected error parameter and estimation means for calculating an estimated speed and an estimated angle of the motor based on the corrected error parameter. The error parameter is a function of an angle error representing a difference between an actual angle and an estimated angle of a motor.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: November 20, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Fumihiro Shimizu, Norihiro Yamamoto
  • Patent number: 10103679
    Abstract: An inverter unit includes a first temperature detector that detects a first temperature of at least one of semiconductor elements and a periphery of the semiconductor elements, current detectors that detect a current of a motor, and a controller that switches a modulation mode of the motor to a two-phase modulation mode or a three-phase modulation mode on the basis of a detection result of the first temperature by the first temperature detector and detection results of the current by the current detectors.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: October 16, 2018
    Inventors: Naohito Kanie, Kazuyoshi Kontani, Naotaka Matsumoto
  • Patent number: 10103656
    Abstract: A vehicle performs first PWM control of generating a first PWM signal of a plurality of switching elements to switch the plurality of switching elements by comparing voltage commands of phases based on a torque command with a carrier voltage when a target operating point including a rotation speed and the torque command of the motor is outside a predetermined area, and selects and performs second PWM control of generating a second PWM signal of the plurality of switching elements to switch the plurality of switching elements based on a modulation factor of a voltage and a voltage phase based on the torque command and the number of pulses in a predetermined period of an electrical angle of the motor or the first PWM control when the target operating point is inside the predetermined area.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: October 16, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Toshihiro Yamamoto, Kenji Yamada
  • Patent number: 10097128
    Abstract: An electronic pump includes a controller. The controller includes a power input terminal, a printed circuit board, a motor driver and a microprocessor. The power input terminal, the microprocessor and the motor driver are spaced from each other by an electronic clearance and are fixedly connected to the printed circuit board. The microprocessor is electrically connected to the motor driver by the printed circuit board. The motor driver drives a motor to rotate based on a drive control signal from the microprocessor. There is no motor drive circuit composed by discrete components and configured to drive the motor to rotate separately arranged on the printed circuit board between the motor driver and a motor.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: October 9, 2018
    Assignee: Zhejiang Sanhua Automotive Components Co., Ltd.
    Inventors: Lulu Zhang, Xuexia Gong, Boning Ye, Hongmin Lu
  • Patent number: 10090747
    Abstract: An electric motor, in particular a printed circuit board, having a stator, and a linearly guided rotor. On the rotor, a bolt ring having a number of bolts is attached. A cycloidal disc is connected in engagement to the bolt ring. An electrical circuit is also provided having a printed circuit board and an electric motor which is attached to the circuit board.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: October 2, 2018
    Assignee: Ellenberger & Poensgen GmbH
    Inventor: Lothar Hofmeister
  • Patent number: 10075111
    Abstract: When electricity is supplied sequentially one by one to coils with a plurality of coil phases provided in a stator of a brushless DC motor, detection is made on a difference of signals corresponding to currents flowing respectively to coils with another plurality of coil phases coupled to the electrically conductive coil phases due to an effect of a magnetic flux of a stopped rotor. A stop position of the rotor with respect to the stator is determined, based on the relationship between a result of the detection operation and a coil phase in association with each other.
    Type: Grant
    Filed: July 11, 2015
    Date of Patent: September 11, 2018
    Inventors: Atsuko Maekawa, Yuuki Akashi, Tetsuhiko Inoue, Futoshi Hosoya
  • Patent number: 10052730
    Abstract: A variable-speed direct current motor comprising a stator (22), a rotor (23) arranged within the stator, and a motor drive device (40) arranged partly at the stator and partly at the rotor, wherein the stator comprises a yoke (25) defining a cylindrical cavity (31), and a plurality of permanent magnets (24) arranged at the yoke, wherein the rotor comprises a cylindrical core (26) and a conductor structure (47) arranged at the core, wherein the motor drive device comprises an alternating current transformer (41) having a primary winding (42) arranged at the stator and a secondary winding (43) arranged at the rotor, a rectifier device (44) arranged at the rotor and connected with the secondary winding, a direct current supply device (45) arranged at the rotor (23) and connected with the rectifier device (44), and with the conductor structure (47), and an operation control device (48) comprising a first unit (49) arranged at the rotor (23) and a second unit (50) arranged externally of the rotor and wirelessly co
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: August 21, 2018
    Inventors: Peng Cheng, Bengt Oelmann, Stefan Haller
  • Patent number: 10027262
    Abstract: An electric drive for a vehicle uses an inverter circuit configured to provide a multi-phase AC drive signal to an electric machine according to a PWM drive signal. A PWM controller monitors an operating point of the electric drive and is configured to identify an operating region of the electric drive from a plurality of predetermined regions in response to the monitored operating point. A sequence memory stores a plurality of sequences, each sequence optimized for a respective one of the predetermined regions to reduce audible noise and switching losses. The PWM controller generates the PWM drive signal according to a respective sequence corresponding to the identified operating region. Thus, the reduction of audible noise and switching losses is optimized based on torque and/or speed of the motor.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: July 17, 2018
    Inventors: Christopher M. Wolf, Michael W. Degner
  • Patent number: 10008972
    Abstract: An electric motor controller for controlling an electric motor and methods of determining a loss of phase condition for at least one phase of three-phase input power provided to an electric motor controller are provided. The controller is configured to obtain phase sample data representing an input power electrical characteristic for at least one phase of three-phase power received by the controller and receive direct current (DC) bus data representing a measured DC bus electrical characteristic. The controller is also configured to calculate a ratio between the phase sample data and the DC bus data, and determine that a loss of phase condition exists for a phase of the three-phase power when the ratio exceeds a predetermined threshold.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: June 26, 2018
    Assignee: Regal Beloit America, Inc.
    Inventors: Zachary Joseph Stauffer, Mark A. Brattoli, Brian L. Beifus, Maung Saw Eddison, Ludovic Andre Chretien
  • Patent number: 9978419
    Abstract: A disk drive thermal performance testing device includes a drive housing, an electrical connector and an adjustable power loading device. The drive housing is at least partially made of a thermally conductive material. The electrical connector is in the drive housing and provides an external connection. The adjustable power loading device is located in the drive housing, is coupled to the electrical connector, and is thermally coupled to the drive housing.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: May 22, 2018
    Assignee: NetApp, Inc.
    Inventors: Jun Shen, Mark Feldmeyer, David Kwong, Dan Ho
  • Patent number: 9929681
    Abstract: Systems and methods associated with an HVAC system and a multi-functional ECM motor for use in the HVAC system are disclosed. The motor controller of the ECM motor includes a microprocessor, a tap detection circuit and a power source portion. The tap detection circuit is coupled to several tap input lines. The motor also includes first and second AC input wires, a common wire, a ground wire, a first jumper wire and a second jumper wire. Each tap input line is coupled to the first input terminal of one current sensing unit. The first jumper wire is coupled to the second AC input wire, and the second jumper wire is coupled to the common wire. By coupling different wires of the ECM motor differently when replacing a PSC motor than when replacing ECM motors, the ECM motor is configured to replace PSC motors and ECM motors in HVAC systems.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: March 27, 2018
    Inventors: Zhao Yong, Chen Yunshen
  • Patent number: 9923504
    Abstract: In a control device for an AC rotary machine that includes a first three-phase winding and a second three-phase winding having a phase difference, a voltage is applied to each phase of the first three-phase winding at an ON interval or an OFF interval equaling or exceeding a first predetermined value. When a first three-phase current is determined to be undetectable, a first voltage command is generated such that ON timings or OFF timings relating respectively to at least two phases of the voltage applied to the first three-phase winding are within a second predetermined value that is smaller than the first predetermined value, and when a second three-phase current is determined to be undetectable, a second voltage command is generated such that ON timings or OFF timings relating respectively to at least two phases of a voltage applied to the second three-phase winding are within the second predetermined value.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: March 20, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tatsuya Mori, Akira Furukawa
  • Patent number: 9923501
    Abstract: A motor includes a frame, a shaft rotatably mounted onto the frame, and at least one disc mounted onto the shaft. At least one permanent magnet is mounted on the disc, and at least one electromagnet and at least one coil are mounted to the frame in rotational magnetic proximity to the permanent magnet. A battery is connectable to the electromagnet and the coil for energizing the electromagnet and for receiving electrical current from the coil for charging the battery. A relay switch controls the transmission of electrical power from the battery to the electromagnet. A sensor generates a signal to the relay switch to activate electrical power to the electromagnet upon sensing that the permanent magnet is positioned with respect to the electromagnet such that a magnetic force generated by the electromagnet would be effective for inducing movement of the permanent magnet and consequent rotation of the disc.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: March 20, 2018
    Inventor: Clifford R. Rabal
  • Patent number: 9917542
    Abstract: A method of determining angular position (?) of a rotor of an N-phase permanent magnet motor (PMM). A processor having an associated stored angular position determination (APD) algorithm is programmed to implement the algorithm to cause an associated motor controller to execute steps including forcing one vector at a time a phase vector set of current or voltage vectors to stator terminals of windings for the N-phases a positive and negative magnitude vector, wherein the vector magnitude is sufficiently small to not move the rotor, and a time duration for the forcing current or voltage vectors is essentially constant. The resulting stator current or voltage levels are measured for each current or voltage vector. An N-dimension current vector or voltage vector is generated from superposition of the resulting stator current levels or resulting stator voltage levels. The N-dimension current vector or voltage vector is used to determine angular position.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: March 13, 2018
    Inventors: Eric James Thomas, David Patrick Magee
  • Patent number: 9906175
    Abstract: Method of starting a three-phase sinusoidal BLDC motor, comprising: a) determining an initial position of the rotor; b) applying a first set of sinusoidal energizing signals to the windings, corresponding to a set of sinusoidal waveforms shifted apart by 120° and 240° sampled at a first angle (?1); and maintaining the energizing signals for allowing the rotor to move to a first angular position; c) while maintaining the energizing signals, monitoring two of the phase currents, and determining whether a predefined condition is satisfied, comprising testing whether a ratio of two total current values is equal to a predefined value, and if true, to repeat steps b) and c), but with second and further sinusoidal energizing signals sampled at a second or further angular position, selected from a limited group of discrete angular positions.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: February 27, 2018
    Inventors: Michaël Bernardus Petrus Esvelt, Robert Filusch
  • Patent number: 9906178
    Abstract: A control apparatus operates an inverter by overmodulation pulse width modulation control or rectangular wave control to control an output torque of a motor to a command torque. When a first condition is not met, the inverter is operated by the overmodulation pulse width modulation control. The first condition is that an amplitude parameter increases and reaches a determination value. The amplitude parameter is an amplitude of an output voltage vector of the inverter or a modulation factor of the output voltage of the inverter. When the first condition and a second condition are met, operation of the inverter is switched from operation by the overmodulation pulse width modulation control to operation by the rectangular wave control. The second condition is that a change amount in a negative d-axis direction of a current vector of current flowing to the motor after the first condition is met reaches a predetermined amount.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: February 27, 2018
    Inventor: Koji Irie
  • Patent number: 9864399
    Abstract: In an embodiment, an integrated circuit such as an SOC (or even a discrete chip system) includes one or more local timebases in various locations. The timebases may be incremented based on a high frequency local clock that may be subject to variation during use due. Periodically, based on a lower frequency clock that is subject to less variation, the local timebases may be synchronized to the correct time, using hardware circuitry. In particular, the correct timebase value for the next synchronization may be transmitted to each local timebase, and the control circuit for the local timebase may be configured to saturate the local timebase at the correct value if the local timebase reaches the correct value before the synchronization occurs. Similarly, if the synchronization occurs and the local timebase has not reached the correct value, the control circuit may be configured to load the correct timebase value.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: January 9, 2018
    Assignee: Apple Inc.
    Inventors: Shu-Yi Yu, Erik P. Machnicki, Gilbert H. Herbeck, Kiran B. Kattel, Manu Gulati
  • Patent number: 9859824
    Abstract: An AC/AC boost converter comprising input terminals, output terminals, an inductor, a bridge arm comprising a pair of bi-directional switches, a capacitor and a control circuit for controlling the switches. The bridge arm and the capacitor are connected in parallel across the output terminals. The inductor has a first end connected to one of the input terminals and a second end connected to one of an end and a junction of the bridge arm, the junction being located between the two switches. Another of the input terminals is then connected to the other of the end and the junction of the bridge arm. An AC power supply supplies an AC input voltage at the input terminals, and the control circuit controls the switches of the bridge arm such that an AC output voltage is supplied at the output terminals, the AC output voltage being greater than the AC input voltage.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: January 2, 2018
    Assignee: Dyson Technology Limited
    Inventors: Stephen Greetham, Andrew Charlton Clothier
  • Patent number: 9837944
    Abstract: A method is proposed for adjusting an actuator (300) of a positioning system (100). The positioning system (100) has an electronically commutated actuator drive (200) which is coupled to the actuator (300), wherein the actuator drive (200) has a permanent magnetic rotor (210), wherein the rotor (210) has a first shaft (212) which extends along a pole axis (290) of the rotor (210). The actuator drive (200) additionally has an electronically commutated stator (230), wherein the stator (230) can be energized using a space phasor (260), wherein the space phasor (260) has an electric phase and an amplitude, wherein the space phasor (260) is aligned with respect to the first shaft (212) of the rotor (210) around a difference phasing.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: December 5, 2017
    Assignee: Robert Bosch GMBH
    Inventors: Alex Grossmann, Reiner Schweinfurth, Simon Dierolf, Michael Kilger, Ingo Immdendoerfer, Udo Sieber
  • Patent number: 9806647
    Abstract: A control system for an electric motor comprising a stator having a plurality of stator coils and a rotor movable along the stator comprises a position detection device and a coil monitoring device. In this case, the position detection device is designed to generate position data representing a position of the rotor along the stator, and the coil monitoring device is designed to generate coil data representing a status of one or a plurality of the stator coils. The control system furthermore comprises a safety device designed to carry out a coordination between the coil data and the position data. Moreover, the safety device is designed to cause the electric motor to be transferred to a safe state if an error has been discovered during the coordination.
    Type: Grant
    Filed: February 15, 2016
    Date of Patent: October 31, 2017
    Inventors: Uwe Prüssmeier, Jan Achterberg
  • Patent number: 9793843
    Abstract: A voltage controller generates a d-axis voltage command value and a q-axis voltage command value on the basis of a drive command signal and a three-phase current. When the state in which the absolute value of the resultant vector of the d-axis voltage command value and the q-axis voltage command value is not within a set predetermined range continues for a predetermined time or longer, a disconnection detector determines that a disconnection between a power converter and an AC motor has occurred. A gate controller transmits a gate command for turning off a switching element provided in the power converter to the power converter when the disconnection detector determines that a disconnection between the power converter and the AC motor has occurred.
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: October 17, 2017
    Inventor: Tsuneyasu Kakizaki
  • Patent number: 9780718
    Abstract: A method of controlling a portable appliance includes measuring an input current supplied to a motor of the portable appliance and measuring a rotational speed of a shaft of the motor. The method also includes determining a current limit based on the rotational speed of the shaft using a substantially continuous function which relates a domain of rotational speeds to a range of current limits. The method further includes reducing, when the input current exceeds the current limit, the rotational speed of the shaft incrementally along the substantially continuous function until the input current is approximately equal to the current limit.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: October 3, 2017
    Assignee: Whirlpool Corporation
    Inventors: Dan Christian Barfus, Wayne Weaver Conard, Alex Lai, Rainman Xiao
  • Patent number: 9774286
    Abstract: A motor control device includes an electric power converter for generating three-phase voltages based on voltage instruction-values, and for supplying them to a motor; an induced-voltage estimation unit for estimating an induced voltage of the motor, based on the voltage instruction-values and electric current feedback values; a dead-time disturbance-voltage compensation unit; and a dead-time disturbance compensation-voltage modification unit for compensating a dead-time disturbance voltage(s) generated in the electric power converter, based on a fundamental wave component of an estimated induced voltage.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: September 26, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takashi Hozuki, Hisanori Yamasaki
  • Patent number: 9762153
    Abstract: A handheld AC power tool is provided. The power tool is comprised generally of: a brushless DC motor; a power cord connectable to an AC power socket; a converter circuit configured to receive input power from the power cord and operable to output a DC bus voltage, a switching arrangement interposed between the electric motor and the converter circuit; a motor drive circuit interfaced with the motor switches; and a power switch operable by a user to selectively energize the motor drive circuit and thereby power on the tool. The converter circuit includes a rectifier and a capacitor electrically coupled across the rectifier, such that the capacitor has capacitance sized to produce a DC bus voltage whose magnitude from an AC power source is substantially same as magnitude of voltage from a DC power source.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: September 12, 2017
    Assignee: Black & Decker Inc.
    Inventors: Michael K. Forster, John C. Vanko, Bhanuprasad V. Gorti, Tal Gottesman
  • Patent number: 9742322
    Abstract: A controller for controlling a brushless DC (BLDC) electric motor is described. The controller may include a hall control module and a timing module. The hall control module may be configured to receive inputs from three hall sensors, detect one of the three hall sensors has failed based on the received inputs, responsive to detecting that the one of the three hall sensors has failed, switch from a three hall sensors mode to a two hall sensors mode, and generate an output to control a plurality of switches to energize appropriate motor phase windings in the BLDC motor based at least in part on the two hall sensors mode. The timing module may be configured to detect a commutation time from the received inputs.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: August 22, 2017
    Assignee: Infineon Technologies AG
    Inventors: Nagappan Rethinam, Prashant Abhishek
  • Patent number: 9722526
    Abstract: A motor drive system includes a control module and a power module for generating control signals and power signals, respectively, for driving an electric motor. An add-on module or subassembly is physically positionable between the control and power modules, and communicates with the control module to allow for communication with external devices.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: August 1, 2017
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: James B. Vitrano, August B. Schrab, Daniel J. Middlestetter, John James Jenks, Kurt R. Hohensee, Jimmy See Yong Koh, Teck Siang Tan
  • Patent number: 9692327
    Abstract: A controller for controlling a multi-phase motor is described. The controller may include a torque control module and a current control module. The current control module may be configured to receive a reference current from the torque control module, determine a reference voltage, determine a flux correction value based on the reference voltage, a maximum available voltage, and a speed of the multi-phase motor, and output the flux correction value. The torque control module may be configured to receive the flux correction value and update the reference current based on the flux correction value.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: June 27, 2017
    Assignee: Infineon Technologies AG
    Inventors: Radovan Vuletic, Dian Tresna Nugraha
  • Patent number: 9680468
    Abstract: A bidirectional power switch includes first and second thyristors connected in antiparallel between first and second conduction terminals of the switch. The first thyristor is of an anode-gate thyristor, and the second thyristor is of a cathode-gate thyristor. The gates of the first and second thyristors are coupled to a same control terminal of the switch by respective dipole circuits. At least one of the dipole circuits is formed by at least one diode or at least one resistor.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: June 13, 2017
    Assignee: STMicroelectronics (Tours) SAS
    Inventors: Yannick Hague, Samuel Menard
  • Patent number: 9680403
    Abstract: A control device for an induction machine includes an angle determining device designed to determine a rotor angle of the induction machine without requiring use of sensors. The angle determining device generates measuring voltage pulses which can be selectively used to replace control voltage pulses used to control the induction machine. Machine currents generated by the measuring voltage pulses can be used to determine a rotor angle without interrupting the control voltage pulses and/or operation of the induction machine.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: June 13, 2017
    Assignee: Robert Bosch GmbH
    Inventors: Martin Braun, Thomas Gaberan
  • Patent number: 9630473
    Abstract: A motor driving device and method for a vehicle are provided to adjust and diagnose an air-conditioning motor by sensing an output signal and a current of a feedback sensor. The motor driving device includes a feedback sensor that configured to output a feedback voltage by detecting a rotation angle of a motor. In addition, a controller is configured to generate a substantially constant current that corresponds to an operation state of the motor and determine a driving state of the motor by combining the constant current with the feedback voltage.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: April 25, 2017
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Jin Kim, June Kyu Park, Soon Myung Kwon
  • Patent number: 9571019
    Abstract: A control device of a motor includes detection section that detect counter-electromotive voltages induced in coils by rotation of a rotor, a counter-electromotive voltage normalizing section that normalizes a value of the counter-electromotive voltage using a normalization coefficient according to a speed of the rotation of the rotor, and a rotor position specifying section that specifies the position of the rotor based on values of the counter-electromotive voltage normalized by the counter-electromotive voltage normalizing section.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: February 14, 2017
    Inventor: Akitoshi Maeda
  • Patent number: 9534612
    Abstract: A control method of a fan comprises steps of: detecting a rotational speed of a blade and a rotor position of the blade; generating a control signal according to the rotational speed and a predetermined rotational speed; obtaining a Back-EMF waveform according to the control signal, the rotational speed, the rotor position and a waveform; adjusting the phase of the Back-EMF waveform; and outputting a switch control signal.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 3, 2017
    Inventors: Jen-Hao Wu, Wei-Shun Huang, Tai-Yu Chen
  • Patent number: 9531302
    Abstract: A ratcheting micromotor includes a ratchet bar defining ratchet teeth along an edge thereof, and first and second ends in opposition to one another. The first end is adapted to be coupled to an object to be moved. A spring is coupled on one end thereof to the second end of the ratchet bar and adapted to be fixed at another end thereof to a base. A bi-directional actuator configured for linear movement in one of a first direction and a second direction, and when energized has a common yoke coupled to a central portion thereof for movement in correspondence therewith. The common yoke includes teeth formed along an edge and positioned such that its teeth engage a portion of the ratchet teeth. A control system energizes the bi-directional actuator to move, alternately, in the first direction and the second direction.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: December 27, 2016
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Kevin Cochran, Daniel Jean, Ezra Chen
  • Patent number: 9531244
    Abstract: Conducting emission suppression in a power circuit for an electric motor comprises a negative temperature co-efficient resistor and capacitor connecting one of the power lines to ground. The NTC resistor is self-stabilizing so that changes in the load current are automatically compensated for.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: December 27, 2016
    Inventors: Arnaud Robelin, Jean-Marc Maurice Petillon, Antony John Webster
  • Patent number: 9486233
    Abstract: A tissue resecting system includes an assembly having first and second tubular members. An electrical motor drive and controller moves the second member to resect tissue received in a window of the first member. A tachometer sends motor drive rotational signals to the controller, and the controller modulates a motor voltage in response to the signals from the tachometer both to drive the second member at a predetermined speed and to calculate resistance to driving the second member at the predetermined speed.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: November 8, 2016
    Assignee: IOGYN, INC.
    Inventors: Robin Bek, Aaron Germain
  • Patent number: 9450402
    Abstract: Integrated circuits with electrostatic discharge (ESD) protection circuitry are provided. Integrated circuits may include input-output pins that are coupled to the ESD protection circuitry. The ESD protection circuitry may include diode circuits, a control circuit, and a power clamp circuit. Each diode circuit may have a first terminal that is coupled to a respective input-output pin and a second terminal that is coupled to a shared ESD control line. The control circuit may supply a boosted voltage onto the control line to reverse bias the diode circuits during normal operation while the power clamp is turned off. During an ESD event, the power clamp may be turned on to sink current from the diode circuits. The power clamp may include a transistor having a substrate that is forward biased to improve transistor drive strength during the ESD event and that is reverse biased to reduce leakage during normal operation.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: September 20, 2016
    Assignee: Altera Corporation
    Inventors: Cheng-Hsiung Huang, Kyle Bowers
  • Patent number: 9306423
    Abstract: Disclosed therein is a motor with a variable magnetic flux, which includes a rotor and a stator located inside the rotor. The rotor includes a rotor housing, a plurality of unit rotor cores and magnets which are attached to the inner wall surface of the rotor housing, and the unit rotor cores and the magnets are arranged in turn. The stator includes a stator core base and a plurality of teeth radially formed on the outer peripheral surface of the stator core base at equal intervals, and each of the teeth has ears formed at both sides of an end thereof.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: April 5, 2016
    Assignee: NEW MOTECH CO., LTD
    Inventors: Jeong Cheol Jang, Je Hyung Seo, Soo Hyun Park, Woon Pil Jung, Hugh Jin Cho, Seung Jae Lee, Byung Taek Kim, Jin Seok Jang