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公开(公告)号：US20240154550A1
公开(公告)日：2024-05-09
申请号：US18409246
申请日：2024-01-10
发明人： Kazuki YOSHINO , Tatsuya YAMAZAKI
摘要： A position detection device includes a motor that rotates a drive target, a periodic sensor that detects a periodic change generated by the rotation of the motor to output a waveform signal having a plurality of periods, and a controller that controls the rotation of the motor. The controller obtains a rotation angle reference line indicating a change in a cumulative rotation angle of the motor based on the waveform signal output from the periodic sensor, and corrects the waveform signal based on a partial waveform signal which is a part of the waveform signal and the rotation angle reference line.
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公开(公告)号：US11865929B2
公开(公告)日：2024-01-09
申请号：US17528360
申请日：2021-11-17
发明人： Seung Hyeon Bin , Han Hee Park , Ho Sun Jang , Ho Rim Choi , Tae II Yoo , Seong Min Kim
IPC分类号： B60L53/122 , B60L50/51 , H02P6/185
CPC分类号： B60L53/122 , B60L50/51 , H02P6/185 , B60Y2200/92
摘要： An apparatus for controlling charging of an electric vehicle is configured to calculate a rotor torque expected to occur during charging based on an angle of a rotor provided in a driving motor before charging is performed by multiple input voltages, and allow charging to be performed after inducing the rotor torque to be less than a reference torque by moving the electric vehicle a specified distance to correct the rotor angle when the calculated rotor torque is greater than the reference torque so as to avoid deterioration or damage to a parking sprag. As a result, it is possible to prevent the parking sprag from being damaged by the rotor torque generated during charging so as to avoid the occurrence of an accident.
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公开(公告)号：US20230179126A1
公开(公告)日：2023-06-08
申请号：US17540278
申请日：2021-12-02
申请人： Bell Textron Inc.
CPC分类号： H02P6/06 , H02P6/185 , H02P1/26 , B60W10/08 , G01R31/343 , B60W2420/50 , B60W2420/90
摘要： A system includes a driver monitor system configured to receive information about driver operation, a relationship table comprising information about an expected relationship between driver operation and a preload force, and a driver controller configured to control a driver in response to the information about driver operation and according to the relationship table. A method of managing a preload force includes providing a first component, providing a second component for compression against the first component, operating a driver to move the first component into contact with the second component, monitoring an operation of the driver, and determining an expected preload force in response to the operation of the driver.
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公开(公告)号：US20180191288A1
公开(公告)日：2018-07-05
申请号：US15740152
申请日：2016-05-26
发明人： Dongsheng LI , Yasuo NOTOHARA , Yuuji YAMAMOTO
CPC分类号： H02P27/085 , H02P6/06 , H02P6/185 , H02P21/14 , H02P27/045 , H02P27/12
摘要： An inverter, motor drive device and freezing device, with which it is possible to effectively suppress current beats in the event of over-modulation without requiring additional circuits. This motor driving device includes: a rectifier circuit that converts the AC voltage from an AC power supply into a DC voltage; a smoothing capacitor that smoothes the DC voltage output from the rectifier circuit; an inverter circuit that converts the DC voltage output from the smoothing capacitor into an AC voltage; and a controller that reduces the current beat component by estimating, using a phase locked loop process, the frequency, phase and amplitude of the current beat component in the output current of the inverter circuit, and corrects the voltage command to the inverter circuit on the basis of the estimated frequency, phase and amplitude.
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5.发明申请公开(公告)号：US20180167009A1
公开(公告)日：2018-06-14
申请号：US15813690
申请日：2017-11-15
申请人： KONICA MINOLTA, INC.
摘要： A controller for a sensorless permanent magnet synchronous motor having a rotor using a permanent magnet, the rotor rotating by a rotating magnetic field, caused by a current flowing through an armature is provided. The controller is configured to apply a pulse voltage for generating a magnetic field vector for searching for the initial position to each of search sections obtained by dividing a target range, narrow down a target range in such a manner that a search section in which a largest amount of current flows through the armature by application of the pulse voltage is selected as a subsequent target range, and repeat the application processing and the narrow-down processing to estimate the initial position.
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公开(公告)号：US09948220B2
公开(公告)日：2018-04-17
申请号：US15653992
申请日：2017-07-19
申请人： DENSO CORPORATION
发明人： Kiyoshi Fujii , Atsuyuki Hiruma
CPC分类号： H02P6/185 , G05B2219/37523 , G05B2219/42148 , G05B2219/50191 , H02P6/18 , H02P21/26 , H02P25/03 , H02P25/22 , H02P2203/11
摘要： A rotation angle estimation apparatus includes: a high-frequency voltage setting unit that sets high-frequency voltages; a circuit operating unit that operates an electric power conversion circuit to apply each of the high-frequency voltages to a corresponding one of winding groups of a rotating electric machine; and a rotation angle estimating unit that estimates a rotation angle of the rotating electric machine based on at least one of high-frequency currents that flow in the winding groups upon application of the high-frequency voltages to the winding groups. Moreover, the high-frequency voltage setting unit sets the high-frequency voltages based on the spatial phase difference between the winding groups so that in a fixed coordinate system of the rotating electric machine, the magnitude of a resultant vector of a plurality of high-frequency voltage vectors, which are respectively applied to the winding groups, becomes smaller than the magnitude of each of the high-frequency voltage vectors.
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公开(公告)号：US20180083558A1
公开(公告)日：2018-03-22
申请号：US15810693
申请日：2017-11-13
发明人： Kazumasa TAKAI
摘要： A system and method for sensing rotor position of a three-phase permanent magnet synchronous motor (PMSM) includes a controller coupled with the PMSM and causing a plurality of voltage pulses to be applied thereto. A timer and/or an analog-to-digital converter is coupled with the PMSM and measures a plurality of values (measured values) from a three-phase inverter coupled with the PMSM. Each measured value may correspond with one of the plurality of voltage pulses and includes a current value or time value corresponding with an inductance of the PMSM. One or more logic elements calculates, based on the measured values and on one or more position algorithms, a position of a rotor of the PMSM relative to a stator of the PMSM. The system is configured to calculate the position of the rotor when the rotor is in a stopped configuration and when the rotor is in a rotating configuration.
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公开(公告)号：US20180062549A1
公开(公告)日：2018-03-01
申请号：US15247635
申请日：2016-08-25
申请人： Analog Devices, Inc.
摘要： The present disclosure provides a system and method to determine at least one parameter of a motor, such as an inductance. The inductance can be determined, such as based on one or more digitally sampled motor winding currents. A digital filter can be applied to the digital samples such as to determine a slope of the motor winding currents. The digital filter can include a least squares fit that can be applied to the digital samples, such as to determine a slope of the motor winding currents. The least squares fit can be determined based on a computation of central tendencies such as an average value of time, an average value of current, an average value of the square of time, and the average value of the product of time and current. The average values can be determined recursively to provide improved computational speed.
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9.发明申请公开(公告)号：US20170366120A1
公开(公告)日：2017-12-21
申请号：US15184159
申请日：2016-06-16
发明人： Yisong Lu , Lyndon Ambruson
IPC分类号： H02P6/18
摘要： Methods and apparatus for determining a position of a rotor in motor, such as a three-phase motor by determining first and second ones of sectors in which a first one of the magnetic poles of the rotor may be positioned by driving phase pairs with complementary signals and examining a voltage of a floating one of the phases. Embodiments can further include driving first and second currents towards the first and second ones of the sectors and analyzing a time for each of the first and second currents to reach a threshold to identify which of the first and second ones of the sectors is aligned with the first one of the magnetic poles of the rotor.
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公开(公告)号：US09825564B2
公开(公告)日：2017-11-21
申请号：US15000103
申请日：2016-01-19
发明人： David P. Magee , Shih-Chin Yang
摘要： A motor controller includes a square wave voltage generator and adding circuitry for adding the square wave voltage to a first drive voltage that is connectable to the stator windings of a motor. A current monitor for monitoring the input current to the motor as a result of the square wave voltage. A device for determining the position of the rotor based on the input current.
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