Patents Examined by Bickey Dhakal
-
Patent number: 11581842Abstract: A magnet temperature estimating device for a motor including a rotor having magnets and configured to output a rotational motive force, and a stator having a plurality of coils opposing the rotor with a gap therebetween, is provided. The device includes a sensor configured to detect an induced voltage induced by rotation of the rotor, and a controller configured to control the motor by supplying power to the plurality of coils in response to an input of a detection signal from the sensor. Gaps adjacent to each magnet in a rotation direction of the rotor are formed in the rotor. The controller estimates a temperature of the magnet based on the induced voltage detected when the magnet opposes any one of the plurality of coils, according to the rotation of the rotor.Type: GrantFiled: December 22, 2020Date of Patent: February 14, 2023Assignee: Mazda Motor CorporationInventors: Nobuhide Seo, Genri Suzuki
-
Patent number: 11581835Abstract: Techniques and apparatus for determining the temperature of a permanent magnet on a rotor of an electrical motor. An example techniques involves determining a first set of parameters for controlling the electrical motor. A temperature of the rotor during a runtime of the electrical motor is determined, based at least in part on the first set of parameters and a first back-electromotive force (back-emf) associated with the electrical motor. A first estimate of a magnetic flux of the permanent magnet is determined based on the temperature of the rotor. An operation of the electrical motor is controlled based at least in part on the first estimate of the magnetic flux of the permanent magnet.Type: GrantFiled: June 28, 2021Date of Patent: February 14, 2023Assignee: Amazon Technologies, Inc.Inventors: Lizon Maharjan, Xiaoqi Wang
-
Patent number: 11577615Abstract: An electric assist system usable for an electric assist bicycle includes an electric motor that generates assist power assisting human power of a rider of the electric assist bicycle, a rotation sensor that outputs a signal in accordance with a rotation of a rotatable component that rotates to operate the electric assist bicycle, an acceleration sensor that outputs a signal in accordance with an acceleration of the electric assist bicycle in a traveling direction thereof, and a controller that calculates a speed of the electric assist bicycle based on an output signal of the rotation sensor and an output signal of the acceleration sensor.Type: GrantFiled: March 6, 2020Date of Patent: February 14, 2023Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHAInventor: Mitsuharu Hasumi
-
Patent number: 11581834Abstract: A method for determining a motor angle, may include deriving a sensor weight and a sensorless weight via a cross product of an actual current vector and a model-based sensored current vector and a cross product of the actual current vector and a model-based sensorless current vector; and determining a final motor angle by applying the sensor weight and the sensorless weight to each of a sensored angle and a sensorless angle.Type: GrantFiled: August 25, 2021Date of Patent: February 14, 2023Assignees: Hyundai Motor Company, Kia Corporation, POSTECH Research and Business Development FoundationInventors: Hee Kwang Lee, Hyun Seok Hong, Kwang Hee Nam, Tae Yeon Lee
-
Patent number: 11581832Abstract: An apparatus includes a controller. To control current through a motor winding, the controller monitors a magnitude of current supplied through the motor winding. The controller compares the magnitude of current to a threshold value. In response to detecting that the magnitude of current crosses the threshold value, the controller terminates a flow of the current through the motor winding. In one application, termination of the current through the motor winding supports more efficient use of energy to drive the motor winding. For example, via the controller, terminating the current through the motor winding to prevent the current from flowing in a reverse direction through the motor winding.Type: GrantFiled: February 22, 2021Date of Patent: February 14, 2023Assignee: Infineon Technologies Austria AGInventors: Pablo Yelamos Ruiz, Tao Zhao
-
Patent number: 11573075Abstract: A system for estimating the angular position of a rotating shaft in an aircraft, the system including at least three electromagnetic effect sensors. The system including a flight controller that runs a voting algorithm, wherein the voting algorithm computes an output datum based on shaft position datum that qualify as both active and admissible. Furthermore, system may include, as a component of the voting algorithm, a banning process where sensors that repeatedly return datum that are either not active or not admissible can be banned.Type: GrantFiled: September 16, 2021Date of Patent: February 7, 2023Assignee: BETA AIR, LLCInventor: Herman Wiegman
-
Patent number: 11571791Abstract: An electromechanical tool including a casing, a shaft driving a tip in rotation and a rotary transformer. The rotating shaft integrates an electronic circuit configured to measure a physical parameter of the shaft, and the rotary transformer includes a stator fixedly attached to the casing and a rotor affixed to the rotating shaft. The stator integrates a first coil and a first support of this first coil, and the rotor integrates a second coil and a second support of this second coil. The supports are made out of plasto-ferrite material.Type: GrantFiled: December 17, 2019Date of Patent: February 7, 2023Assignee: ETABLISSEMENTS GEORGES RENAULTInventors: Arnaud Gilibert, Julien Picard, Christophe Guihard
-
Patent number: 11566666Abstract: A processing machine includes: a static pressure bearing configured to support a drive shaft; a fluid feeder configured to output a fluid to be supplied to the static pressure bearing, in accordance with rotation of a servomotor; a sensor configured to detect a physical quantity of the fluid output from the fluid feeder; and a control unit configured to control the rotation speed of the servomotor according to the physical quantity of the fluid.Type: GrantFiled: March 16, 2020Date of Patent: January 31, 2023Assignee: FANUC CORPORATIONInventors: Yuuta Ishii, Hiroshi Minami
-
Patent number: 11563392Abstract: Systems, apparatus, and methods related to an automated footwear platform including motor control techniques. The motor control techniques can include operations such as operating a motor to produce different operating characteristics based on incoming battery voltage. More specifically, the control technique compares incoming battery voltage to a threshold voltage and selects from at least two target operating characteristics. If the voltage transgresses the threshold the motor is controlled to produce a first operating characteristic, and if the voltage does not transgress the threshold the motor is controlled to produce a second operating characteristic.Type: GrantFiled: October 3, 2019Date of Patent: January 24, 2023Assignee: NIKE, Inc.Inventor: Summer L. Schneider
-
Patent number: 11557900Abstract: A system contains a double fed induction machine having a stator and a rotor, a fly wheel coupled to the rotor, and a control device for providing a rotor voltage and a rotor current to the rotor. The control device is connected to the rotor and the stator and is capable of generating the rotor voltage and rotor current in response to an electrical signal that is applied to the stator. The control device has a multilevel converter and a control unit for controlling the multilevel converter.Type: GrantFiled: July 2, 2021Date of Patent: January 17, 2023Assignee: Siemens Energy Global GmbH & Co. KGInventors: Felix Kammerer, Jens Rosendahl, Kunal Sharma, Nicol Hildebrand, Wilfried Hofmann, Martin Leubner, Nico Remus
-
Patent number: 11557998Abstract: A motor controller configured to drive a permanent magnet synchronous motor (PMSM) with Field Oriented Control (FOC), includes a current controller configured to generate control signals for driving the PMSM. The current controller is configured to measure current information of the PMSM, including a direct-axis motor current and a quadrature-axis motor current. The current controller includes a direct-axis current regulator configured to receive a direct-axis reference current and the direct-axis motor current to generate a direct-axis error value based on a difference between the direct-axis reference current and the direct-axis motor current. The current controller includes a voltage regulator configured to regulate a DQ voltage vector comprising a direct-axis motor voltage and a quadrature-axis motor voltage, wherein the voltage regulator generates the direct-axis motor voltage based on the direct-axis error value and a voltage vector limiting function to drive the direct-axis motor current to zero.Type: GrantFiled: April 13, 2021Date of Patent: January 17, 2023Assignee: Infineon Technologies Austria AGInventor: Brendan Aengus Murray
-
Patent number: 11539322Abstract: An electric motor system implements a redundant wye-wounded motor that includes first phase leads, second phase leads, first neutral leads, and second neutral leads. The first and second phase leads receive alternating current (AC) power from a power supply. A first phase-lead switch selectively connects the first phase leads to the power supply, and a second phase-lead switch selectively connects the second phase leads to the power supply. A first neutral-lead switch selectively connects the first neutral leads to the redundant wye-wounded motor, and a second neutral-lead switch selectively connects the second neutral leads to the redundant wye-wounded motor. A controller detects a circuit fault among a plurality of different types of circuit faults, and controls the operation of one or both of the primary neutral-lead switch and the second neutral-lead switch based on the circuit fault.Type: GrantFiled: June 15, 2021Date of Patent: December 27, 2022Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Joseph Kenneth Coldwate, Andreas C. Koenig
-
Patent number: 11539318Abstract: A method determines a correction value for a control device for an electric machine, which describes an angular difference between a position of a d-axis of the electric machine and an actual position of the d-axis. The correction value is determined in a rotating state of a rotor of the electric machine as a function of a d voltage value describing a d component of a stator voltage specified by the control device in the initial configuration, of a q voltage value describing a q component of the stator voltage specified by the control device in the initial configuration, of a flux value describing a magnetic flux of the rotor, a speed value describing the speed of the rotor in the rotating state, and of a calibration value describing a speed-dependent voltage error of the d component of the stator voltage.Type: GrantFiled: September 20, 2019Date of Patent: December 27, 2022Assignee: VALEO SIEMENS EAUTOMOTIVE GERMANY GMBHInventors: Markus Seilmeier, Andreas Held, Andreas Walter, Hans-Georg Köpken
-
Patent number: 11529993Abstract: To provide a motor controller and an electric power steering apparatus which can suppress torque fluctuation resulting from low detection resolution of angle, with simple calculation, even in condition where the rotational speed of motor is low. A motor controller estimates an angle error correlation value correlated with the angle detection error based on the current command value when a change frequency of the angle detection value is lower than a cutoff frequency of feedback control system which controls a rotation state; corrects the current command value or the angle detection value based on the estimation value of angle error correlation value; and changes the estimation value of angle error correlation value so that the absolute value of angle detection error increases with respect to increase in the current command value, and the absolute value of angle detection error decreases with respect to decrease in the current command value.Type: GrantFiled: November 7, 2017Date of Patent: December 20, 2022Assignee: Mitsubishi Electric CorporationInventors: Kenta Tanaka, Isao Kezobo, Akira Furukawa, Seiji Sawada
-
Patent number: 11531047Abstract: A current measuring system (10) for a commutated motor (20). The current measuring system comprises a bridge circuit (30) with several branches (30a-c), wherein the branches (30a-c) are in each case connected to commutation blocks of the commutated motor (20), and the branches (30a-c) each have a current measuring circuit (60a-c).Type: GrantFiled: January 10, 2020Date of Patent: December 20, 2022Assignee: TDK—Micronas GmbHInventor: Adriano de Rosa
-
Patent number: 11533008Abstract: Provided is a method for determining the rotational position of a rotor in a permanent magnet synchronous machine, wherein the stator includes windings for a first, second and third phase, including the steps: applying a first voltage pulse to the first phase, determining respective first measures for the current induced by the first voltage pulse in the second and third phase, selecting a first selected phase depending on the first measures for the current, wherein the first selected phase is either the second or the third phase, applying a second voltage pulse to the first selected phase, determining respective second measures for the current induced by the second voltage pulse in the phases of the stator that are not the first selected phase, and determining the rotational position of the rotor depending on the second measures of the current.Type: GrantFiled: December 9, 2019Date of Patent: December 20, 2022Assignee: SIEMENS GAMESA RENEWABLE ENERGY A/SInventors: Ximeng Wu, Zhan-Yuan Wu, Zi-Qiang Zhu
-
Patent number: 11533016Abstract: A control unit determines a presence or absence of a short-circuit failure with respect to a target switch which is a phase-opening switch to be determined. At this time, after opening all the phase opening switches, the control unit drives an inverter to connect a power supply line provided with the target switch among the phase opening switches to ground. The control unit determines that the target switch has a short-circuit failure when a voltage of the power supply line in which the target switch is not provided is smaller than a predetermined voltage.Type: GrantFiled: July 12, 2019Date of Patent: December 20, 2022Assignee: DENSO CORPORATIONInventors: Haruo Suzuki, Takashi Suzuki
-
Patent number: 11527986Abstract: An apparatus includes a servo motor being configured to drive a traveling part for transferring an object along a traveling rail, a servo driver being configured to control an operation of the servo motor with adjusting a torque of the servo motor according to a load level, an overload determination unit being configured to check a degree of overload of the servo driver and a motion controller being configured to generate a speed signal and a speed profile according to a transfer command which a control unit of controlling an operation of the traveling part transmits thereto, the motion controller generating either a normal speed profile when the servo driver is not at an overload state or a corrected speed profile when the servo driver is at the overload state, and transmitting the speed signal and the speed profile to the servo driver.Type: GrantFiled: November 19, 2020Date of Patent: December 13, 2022Assignee: SEMES CO., LTD.Inventors: Jun Beom Lee, Yeong Jae Choi
-
Patent number: 11527987Abstract: Provided is an abnormality diagnosis device including: a physical quantity measurement processor configured to acquire, as time-series data, a physical quantity of an electric motor or a load; a feature parameter calculation processor configured to calculate feature parameters; a correlation function creation processor configured to create a correlation function for two or more feature parameters, and calculate a correlation coefficient corresponding to a measurement result of the physical quantity that changes depending on an abnormality occurrence state; a database configured to store in advance reference data in which a remaining time until a failure is caused and the correlation coefficient are associated with each other; and a diagnosis processor configured to extract from the reference data the remaining time corresponding to the correlation coefficient, and identify the remaining time until the electric motor or the load causes a failure or a part that has caused a failure.Type: GrantFiled: December 27, 2018Date of Patent: December 13, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Hiroshi Inoue, Makoto Kanemaru, Junji Hori, Tomoaki Takewa, Takuma Sasai
-
Patent number: 11515813Abstract: According to one or more embodiments, a motor control system that provides torque ripple compensation includes a current regulator that receives a first current command corresponding to an input torque command. The current regulator further generates a first voltage command based on the first current command using a first transformation matrix. The current regulator further receives a second current command corresponding to a torque ripple to be compensated. The current regulator further generates a second voltage command based on the second current command using a second transformation matrix. The current regulator further computes a final voltage command using the first voltage command and the second current command, the final voltage command being applied to a motor.Type: GrantFiled: March 26, 2019Date of Patent: November 29, 2022Assignee: Steering Solutions IP Holding CorporationInventors: Prerit Pramod, Julie A. Kleinau