-
公开(公告)号：US11557992B2
公开(公告)日：2023-01-17
申请号：US17321020
申请日：2021-05-14
发明人： Raquib Buksh , Kevin M. Gertiser , Ihab Nahlus , Tushar Nachnani , Ronald M. Shearer , Mitchell Cohen , Spandana V. Barre
摘要： A method for phase-voltage based motor period measurement includes generating a commanded phase voltage and applying the commanded phase voltage to a first phase voltage input of an electric motor, a second phase voltage input of the electric motor, and a third phase voltage input of the electric motor, measuring a first period of a phase voltage associated with the first phase voltage input and the second phase voltage input and comparing the measured first period to a frequency of the commanded phase voltage, and, in response to a determination that the measured first period of the phase voltage associated with the first phase voltage input and the second phase voltage input is outside of a range of the frequency associated with the commanded phase voltage, identifying a fault associated with the first integrated circuit or signal path.
-
公开(公告)号：US20220416694A1
公开(公告)日：2022-12-29
申请号：US17357455
申请日：2021-06-24
摘要： According to some embodiments, method for controlling a motor comprises generating a drive signal for the motor, the drive signal comprising a demand flux generating voltage parameter. A feedback torque generating current parameter and a feedback flux generating current parameter are determined based on a three-phase motor current measurement. A feedback flux generating voltage parameter is determined based on the feedback torque generating current parameter and the feedback flux generating current parameter. An estimated motor position and an estimated motor speed are determined based on the feedback flux generating voltage parameter and the demand flux generating voltage parameter. The drive signal is generated based on the estimated motor position and the estimated motor speed.
-
3.发明授权公开(公告)号：US11533008B2
公开(公告)日：2022-12-20
申请号：US16707240
申请日：2019-12-09
发明人： Ximeng Wu , Zhan-Yuan Wu , Zi-Qiang Zhu
摘要： 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.
-
公开(公告)号：US20220255481A1
公开(公告)日：2022-08-11
申请号：US17731302
申请日：2022-04-28
发明人： Sadayuki SATO , Hideaki IURA , Akira YAMAZAKI
摘要： A power conversion device include: a power conversion circuitry configured to generate a driving voltage for an electric motor; and control circuitry configured to: control the power conversion circuitry to generate the driving voltage corresponding to a voltage command; acquire information indicating an output current that has flown to the electric motor according to the driving voltage; calculate a phase error based on the voltage command, the output current, and an inductance of the electric motor; calculate an updated voltage command based on a frequency command, the output current, and the inductance, wherein the updated voltage command has a command phase; calculate a phase error based on the voltage command, the output current, and the inductance; correct the command phase based on the phase error; and control the power conversion circuitry to generate the driving voltage corresponding to the updated voltage command having the corrected command phase.
-
公开(公告)号：US11336213B2
公开(公告)日：2022-05-17
申请号：US16969516
申请日：2019-01-21
发明人： Masafumi Hotta , Daisuke Hirono
摘要： Provided is a motor control device having a function for determining a rotor position of a synchronous motor, without use of a sensor, the device prevents obtaining an erroneous rotor position, to enable stable control of the synchronous motor based on the rotor position in both the normal-control region and the flux-weakening-control region. The motor control device 1 includes: a first rotor position determining unit 19 that determines a rotor position of the synchronous motor 2 based on a current electrical angle, and a first current phase obtained from a current peak value and a difference between an induced voltage electrical angle and a current electrical angle; a second rotor position determining unit 20 that determines the rotor position of the synchronous motor 2 based on the current electrical angle, and a second current phase obtained from a flux linkage and the current peak value; and a selecting unit 21 that selects the first rotor position determining unit 19 or the second rotor position determining unit 20, based on the current peak value, and the first current phase or the second current phase.
-
6.发明授权公开(公告)号：US11228265B2
公开(公告)日：2022-01-18
申请号：US16798729
申请日：2020-02-24
发明人： Masanori Okubayashi
摘要： Implementations of a system for sensing rotor position of a PMSM may include: a controller which may be coupled with the PMSM. The controller may be configured to apply a plurality of voltage vectors to the PMSM to generate a plurality of sensing signals from a stator of the PMSM in response. A comparator may be coupled to the PMSM configured to receive and to compare each one of the plurality of sensing signals with a threshold voltage. A rise time measurement circuit may calculate a plurality of rise times using the plurality of sensing signals in response to receiving a signal from the comparator. The rotor-angle estimation circuit may be configured to identify from the plurality of rise times a shortest rise time and a voltage vector corresponding with the shortest rise time and thereby identify the position of the rotor of the PMSM.
-
7.发明授权公开(公告)号：US11218097B2
公开(公告)日：2022-01-04
申请号：US16794623
申请日：2020-02-19
申请人： KONE Corporation
发明人： Tuukka Kauppinen , Lauri Stolt , Mikko Paakkinen
摘要： A method for determining a rotor position of an electric motor, an elevator and an electrical converter unit are presented. The method comprises supplying a first excitation signal to the electric motor, determining a first response signal generated in the motor in response to the first excitation signal, determining, based on the first response signal, an electrical angle of a direct axis of the motor with respect to a stationary reference frame, supplying a second excitation signal to the motor, wherein the second excitation signal is based on the determined electrical angle, determining a second response signal generated in the motor in response to the second excitation signal, and determining the rotor position based on the second response signal.
-
公开(公告)号：US11183955B2
公开(公告)日：2021-11-23
申请号：US16341348
申请日：2017-12-12
发明人： Kiyoshi Yamamoto
摘要： The present invention addresses the problem of providing a method which makes it possible to simply evaluate an output of an initial position detection signal for a permanent magnetic field, along with providing a method for correcting errors that occur in the initial position detection signal. As a means for solving said problem, an MPU (51) obtains a correction value in which an offset error has been corrected by multiplying a first measurement value or a second measurement value, which are measured for each conduction pattern when an offset error occurs during position detection of a permanent magnetic field, by a correction coefficient A and estimates the position of the permanent magnetic field on the basis of the correction value.
-
公开(公告)号：US20210333130A1
公开(公告)日：2021-10-28
申请号：US16332669
申请日：2018-06-06
发明人： Bo HUANG , Jiangming HUO
摘要： Provided are a motor rotation angle measurement device and method. The device may comprise: a signal conditioning circuit, configured to receive a three-phase output voltage of a motor and separately generate three square-wave signals; and a processor, configured to generate a six-multiplying frequency pulse whenever jumping of any one of the three square-wave signals, is detected in a rotation period of a motor, generate compensation pulses between the current six-multiplying frequency pulse and a next six-multiplying frequency pulse based on a time interval between the current six-multiplying frequency pulse and a previous six-multiplying frequency pulse and a preset compensation subdivision coefficient k, and accumulate the number of the compensation pulses, wherein the number of the compensation pulses is related to the rotation angle of the motor.
-
10.发明授权公开(公告)号：US11081986B2
公开(公告)日：2021-08-03
申请号：US16610414
申请日：2018-04-25
申请人： Robert Bosch GmbH
摘要： The invention relates to a method and device for determining the position angle of a rotor (2) in an electric synchronous machine (1). The device is designed to comprise: a voltage generator (12) for generating electrical voltage pulses at angles in a coordinate system fixed in respect of the stator when the rotor (2) is stationary; a measuring device (14) for measuring any electrical current value returning to the electrical voltage pulses generated by the voltage generator (12); and a computing device (16), which is designed: —to store a current signal curve of the current values measured; —to generate a zero-mean current signal curve by shifting the current signal curve or the measured current values; —to compute an integral function (83) of the zero-mean current signal curve; and—to determine the position angle of the rotor (2) on the basis of the computed integral function (83).
-
-
-
-
-
-
-
-
-
搜索结果
146 条记录 (耗时 0.019 秒)