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1.发明授权公开(公告)号：US12081159B2
公开(公告)日：2024-09-03
申请号：US17592921
申请日：2022-02-04
发明人： Venkata Naresh Kotikelapudi , Kaushik Alwala , David Magee , James Lockridge , Siddhartha Gopal Krishna
摘要： A motor control system and method for controlling a brushed direct current (BDC) motor using a feedback loop based on a corrected ripple count. Motor control circuitry, for example implemented in digital logic such as a microcontroller, receives a coil current signal and a motor voltage signal. Discontinuities in the coil current signal, such as caused by commutation of the BDC motor, are counted to generate a ripple count. An observer function derives an angular frequency model estimate for the values of the coil current and motor voltage signals using a computational model for the motor. A corrected ripple count is generated based on a comparison of a commutation angle of the motor with an angular position based on the angular frequency model estimate over a time interval between discontinuity pulses. A motor drive signal is adjusted based on the corrected ripple count.
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公开(公告)号：US20240055970A1
公开(公告)日：2024-02-15
申请号：US18496000
申请日：2023-10-27
发明人： Masaharu Naka , Norihiro Suzuki , Satoru Deguchi
CPC分类号： H02K41/031 , H02K7/06 , H02P6/006
摘要： The disclosed linear motor includes a stator having a plurality of cores and coils that excite the plurality of cores, respectively, and a movable element having a permanent magnet and configured to move using electromagnetic force applied from the stator as driving force, each of the plurality of cores has an excitation unit wound with the coil and an acting unit configured to be magnetically coupled to the excitation unit and cause a magnetic flux applied from the excitation unit to work on the permanent magnet of the movable element, and the linear motor includes an airgap or a heat conduction reduction portion between the excitation unit and the acting unit, and the heat conduction reduction portion reduces heat conduction from the excitation unit to the acting unit more than in a case where the excitation unit and the acting unit are in direct contact with each other.
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公开(公告)号：US11777423B2
公开(公告)日：2023-10-03
申请号：US17740389
申请日：2022-05-10
发明人： Mateusz Romaszko , Grzegorz Wyszynski , Piotr Maj
摘要： A method for determining a movement of a rotor of an electric motor, comprises supplying a drive signal to a drive coil of the electric motor, sensing a coil current of the drive coil, detecting current ripples of the sensed coil current caused by the rotor of the electric motor crossing ripple generating positions, inferring the movement of the rotor from the detected ripples, braking the motor by reducing the drive signal supplied to the drive coil from an initial signal value to zero according to a braking curve specifying a non-zero fall time during which the drive signal is reduced from the initial signal value to zero. The braking curve is adapted so that the rotor does not cross a ripple generating position after the drive signal has been reduced to zero.
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公开(公告)号：US11742738B2
公开(公告)日：2023-08-29
申请号：US17720706
申请日：2022-04-14
申请人： IRIS DYNAMICS LTD
IPC分类号： G05B19/416 , H02K41/03 , H02K11/215 , H02P25/064 , H02P6/00 , H02P6/16
CPC分类号： H02K41/031 , H02K11/215 , H02P6/006 , H02P6/16 , H02P25/064
摘要： An embodiment of a linear electric machine includes two or more phases that define a central bore, and alternating permanent magnets that are disposed within the central bore and are free to move relative the windings. An embodiment of a method for selectively powering the windings is disclosed that enables the machine to realize a commanded force, or to determine the force present by using the current within the windings and the alignment of the magnets relative to the windings.
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公开(公告)号：US20230188062A1
公开(公告)日：2023-06-15
申请号：US18062027
申请日：2022-12-06
发明人： TAKUMA HASHIZUME
CPC分类号： H02P6/006 , B65G54/02 , H02K11/22 , H02K41/031 , H02P6/16 , H02P25/064 , B65G2203/0283
摘要： A transport apparatus includes: a stator; a mover that includes a first scale and is movable along the stator in a first direction; a plurality of first detectors each of which is provided to be able to face the first scale and detects a position of the mover in a second direction crossing the first direction; and a control unit that controls position and/or attitude of the mover, the first scale and the first detector constitute an incremental encoder, wherein the plurality of first detectors are arranged at a predetermined interval along the first direction in the stator, and the control unit corrects position information of the mover by a detection value of one of the first detectors based on position information of the mover by a detection value of another of the first detectors.
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6.发明授权公开(公告)号：US11641169B2
公开(公告)日：2023-05-02
申请号：US17184395
申请日：2021-02-24
发明人： Jadav Das
IPC分类号： H02P25/06 , H02P6/00 , H02P25/064
摘要： A motor controller is provided that executes a commutation routine in one of a plurality of operating modes to regulate current provided to drive coils in a linear motion system. The motor controller generated currents for each of the drive coils in a first operating mode to minimize the copper losses in the drive coils, in a second operating mode to maximize the force applied to the mover, in a third operating mode to provide balanced currents between the drive coils, and in a fourth operating mode to provide currents according to a selected operating point that combines characteristics of the first three operating points. The motor controller may also monitor each of the drive coils for saturation and redistribute at least a portion of the current required to control operation of the mover to the other drive coils when one of the drive coils is saturated.
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7.发明授权公开(公告)号：US11634938B2
公开(公告)日：2023-04-25
申请号：US16626455
申请日：2018-06-21
申请人： Ori Inc.
摘要： Improved systems and methods for operating moveable architectural elements (e.g., furniture) are described. The system can include improved features implemented throughout various elements, including hardware elements, controller elements, and/or software elements. As one example, the system can feature the ability to map a characteristic load profile across a particular length of actuation and, if during operation a measured load exceeds the profile, adjust (e.g., stop) the system's motion. The system can also advantageously map its current draw to increase energy efficiency. In addition, the system can include a positioning system that enables it to automatically determine its position upon start up and during operation. In some implementations, the system includes multiple moveable elements (e.g., furniture items). In some cases, power is distributed to the moveable element(s) using a moveable power distribution module. Many other improvements and features are contemplated and described.
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公开(公告)号：US20230090794A1
公开(公告)日：2023-03-23
申请号：US17512896
申请日：2021-10-28
发明人： Tsung-Han YANG , Yen-Chih WANG , Ming-Jun HSIAO , Tsung-Nan WU
摘要： An electronic device for controlling an LRA (Linear Resonant Actuator) includes a signal generator, a driver, a delay unit, a sensor, and a DSP (Digital Signal Processor). The signal generator generates a digital signal. The driver drives the LRA according to the digital signal. The delay unit delays the digital signal for a predetermined time, so as to generate an estimated voltage signal. The sensor detects the current flowing through the LRA, so as to generate a sensing current signal. The DSP controls the resonant frequency or the gain value of the signal generator according to the estimated voltage signal and the sensing current signal.
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公开(公告)号：US11575337B2
公开(公告)日：2023-02-07
申请号：US17272715
申请日：2019-10-04
发明人： Xiaodong Lu , Yao Kevin Xiao
IPC分类号： H02P25/064 , H02K11/225 , H02K41/03 , H02P6/00 , H02P6/16
摘要： A system is described in which a magnetic mover includes at least one mover identification device. The system also includes a stator defining a work surface and including an actuation coil assembly and at least one stator identification device operable to interact with the at least one mover identification device. One or more sensors are used to sense a position of the first magnetic mover. One or more stator driving circuits are used to drive the actuation coil assembly to thereby move the first magnetic mover over the work surface. The first magnetic mover includes one or more magnetic components positioned such that interaction of one or more magnetic fields emitted by the one or more magnetic components with one or more magnetic fields generated by the actuation coil assembly when driven by the one or more stator driving circuits enables movement of the first magnetic mover in at least two degrees of freedom.
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公开(公告)号：US11557993B2
公开(公告)日：2023-01-17
申请号：US16952460
申请日：2020-11-19
发明人： Chang Seok You , Joo Yeon Kim , Sung Do Kim , Min Su Kang
摘要： A motor-driving control system includes an actuator configured to generate rotational force by driving received current, a current provider configured to provide current to the actuator while repeatedly turning on and off the current at a preset period and duty, and a controller configured to estimate a rotation position or a rotation speed of the actuator in a section in which the current of the current provider is turned on or off and to control the current provider to follow a speed command based on the estimated rotation position or rotation speed.
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