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公开(公告)号：US20250070693A1
公开(公告)日：2025-02-27
申请号：US18455343
申请日：2023-08-24
Applicant: Cypress Semicondutor Corporation
Inventor： Taskeen Zaidi , Ketan Dewan
Abstract: An electronic circuit may be configured to obtain an input including one or more hall sensor readings, determine a current motor position based on the input and a first lookup table, determine a desired motor position based on the first lookup table on the current motor position, determine a pulse width modulation (PWM) commutation pattern based on the desired motor position and a second lookup table, and output the PWM commutation pattern within a predetermined time from obtaining the input.
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公开(公告)号：US20250007431A1
公开(公告)日：2025-01-02
申请号：US18751396
申请日：2024-06-24
Applicant: TDK CORPORATION
Inventor： Shunji SARUKI , Hiraku HIRABAYASHI , Kazuya WATANABE
Abstract: An angle detection device includes an angle sensor configured to detect a rotating magnetic field that changes periodically in response to a rotation angle of a motor and output a first detection signal and a second detection signal having a phase difference whose value is not an integer multiple of 90°, and a logic signal generation section configured to generate a first logic signal using the first detection signal, generate a second logic signal having a phase different from that of the first logic signal using the second detection signal, and generate a third logic signal having a phase different from those of the first and second logic signals using the first and second logic signals.
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公开(公告)号：US12160195B2
公开(公告)日：2024-12-03
申请号：US17910029
申请日：2021-03-10
Applicant: Festool GmbH
Inventor： Patrick Schön , Markus With
Abstract: A drive motor (10) for a vacuum cleaner or a machine tool, wherein the drive motor (10) includes a stator (20) with a stator coil arrangement (26), and a rotor (30) wherein a sensor arrangement (60) is arranged in a stationary manner with respect to the stator in order to detect a respective angle of rotation position of the rotor (30) with respect to the stator, said sensor arrangement comprising at least two sensors (67A, 67b, 67C). It is provided that the at least two sensors are configured to detect two waves of a magnetic rotating field (FB) of the rotor (30) wherein the sensors generate the switching signals in a manner dependent on a wave of the magnetic rotating field (FB) exceeding or undershooting a switching threshold (SH, SL) of the sensor (67A, 67b, 67C).
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公开(公告)号：US12155338B2
公开(公告)日：2024-11-26
申请号：US18105943
申请日：2023-02-06
Applicant: ANPEC ELECTRONICS CORPORATION
Inventor： Jyun-Ping Jiang , Shih-Hai Chien
IPC: H02P6/16 , H02P29/024 , H02P3/22
Abstract: A motor driver having a motor abnormality detection mechanism is provided. A motor position detecting circuit detects a change in a state of a rotor of the motor switching between a plurality of magnetic pole positions to output a commutation signal. An abnormality determining circuit, according the commutation signal, determines a plurality of time intervals during which the rotor of the motor is switched to the plurality of magnetic pole positions respectively to output an abnormality detected signal. A rotational protection controller circuit outputs a rotation protecting signal to a motor driving circuit according to the abnormality detected signal. A motor driving circuit drives the motor according to the rotation protecting signal. When the abnormality detected signal received by the rotational protection controller circuit indicates that the motor abnormally rotates, the rotational protection controller circuit adjusts the rotation protecting signal outputted to the motor driving circuit.
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公开(公告)号：US12146360B2
公开(公告)日：2024-11-19
申请号：US17764006
申请日：2020-11-20
Applicant: MITSUI KINZOKU ACT CORPORATION
Inventor： Takuya Imai
IPC: H02P6/28 , E05F15/41 , E05F15/659 , H02P6/16
Abstract: A sliding door driving device includes: a power source; a motor that outputs power to open and close the door; a motor driving circuit that connects the power source and the motor to each other; and a motor control device that controls the motor driving circuit. The motor control device includes an inverter that converts DC power supplied from the power source into AC power, and a shunt resistor disposed between the power source and the inverter. The position detection unit of the motor control device obtains the rotation angle of the motor based on the output of the shunt resistor.
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Patent Agency Ranking
公开(公告)号：US12143052B2
公开(公告)日：2024-11-12
申请号：US17626554
申请日：2020-07-14
Applicant: Masayuki Nashiki
Inventor： Masayuki Nashiki , Hiroyuki Nashiki
Abstract: In induction motors, efficiency is improved and a maximum torque is increased. For a magnetic flux density of the stator pole for each phase of an induction motor, a circumferential magnetic flux density distribution is controlled to any distribution state, from a trapezoidal wave-like distribution close to a square wave to a sinusoidal distribution. In particular, motor efficiency in a range of low to medium rotations is improved. The motor structure is designed to reduce the leakage inductance of the rotor windings, and the motor and control thereof are optimized for each other. This increases the maximum torque of the motor more effectively. In addition, the high efficiency of the motor makes it possible to reduce the size of the drive circuit.
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公开(公告)号：US20240372491A1
公开(公告)日：2024-11-07
申请号：US18657533
申请日：2024-05-07
Applicant: Cepheid
Inventor： Richard Casler, Jr. , Rajesh Nerkar , Jeffrey Davis
IPC: H02P6/16
Abstract: A DC electric motor having a stator mounted to a substrate, the stator having a coil assembly having a magnetic core, a rotor mounted to the stator with permanent magnets distributed radially about the rotor, the permanent magnets extending beyond the magnetic core, and sensors mounted to the substrate adjacent the permanent magnets. During operation of the motor passage of the permanent magnets over the sensors produces a substantially sinusoidal signal of varying voltage substantially without noise and/or saturation, allowing an angular position of the rotor to be determined from the sinusoidal signals by utilizing a transformation matrix or piece-wise algorithm applied in substantially linear portions of the sinusoidal signals without requiring use of additional hardware encoder or position sensors and without requiring noise-reduction or filtering of the signal.
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公开(公告)号：US12134546B2
公开(公告)日：2024-11-05
申请号：US17865816
申请日：2022-07-15
Applicant: KABUSHIKI KAISHA YASKAWA DENKI
Inventor： Minoru Koga , Shota Kawahara , Junichi Ito
Abstract: A gantry drive system includes: a first motor configured to drive a driving object along a first axis; a second motor configured to drive the driving object along a second axis parallel with the first axis; and a motor control system configured to control the first and second motors. The motor control system includes a mode switch that performs a switching between a first control mode in which a position of the driving object on each of the first and second axes is individually controlled while reducing an inter-axis positional deviation between the first and second axes, and a second control mode in which a rotational state of the driving object is controlled while controlling a position of the driving object, based on detected positions of the driving object on the first and second axes.
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公开(公告)号：US12104693B2
公开(公告)日：2024-10-01
申请号：US17385177
申请日：2021-07-26
Applicant: DENSO CORPORATION
Inventor： Haruka Miyano , Koji Sakaguchi , Jun Yamada , Seiji Nakayama
CPC classification number: F16H61/32 , F16H61/0202 , H02P3/18 , H02P6/28 , F16H2061/326 , H02P27/06
Abstract: A shift range control device switches a shift range by controlling a drive of a motor in which a rotor rotates by energizing a motor winding. An angle calculation unit calculates a motor angle based on a signal from a rotation angle sensor that detects a rotation position of the rotor. An energization control unit drives the rotor so that the motor angle becomes a target angle according to the target shift range, and stops the rotor at a position where the motor angle becomes the target angle, by controlling the energization of the motor winding. A zero point estimation unit estimates a speed 0 point, which is a timing at which a rotational speed of the vibrating rotor becomes 0 during the stop control for stopping the rotor. The energization control unit switches a current control at the estimated speed 0 point.
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公开(公告)号：US20240322718A1
公开(公告)日：2024-09-26
申请号：US18262689
申请日：2021-12-17
Inventor： Takumi ITO
Abstract: A drive system according to an aspect of an embodiment includes a rotor phase detection unit, a phase estimation unit, a phase error adjustment unit, and a drive control unit. The rotor phase detection unit detects a phase of a rotor of a synchronous motor and outputs phase information indicating the detected phase. The phase estimation unit generates an initial phase command of defining a position of the rotor of the synchronous motor by using a correction amount for correcting a phase error. The phase error adjustment unit generates the correction amount for adjusting a phase error of an initial magnetic pole position of the synchronous motor by using a phase error of the initial phase command at a timing defined by the phase information. The drive control unit controls the driving of the synchronous motor by using the initial phase command obtained by adjusting the phase error.
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