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公开(公告)号：US20240022192A1
公开(公告)日：2024-01-18
申请号：US18254599
申请日：2021-11-12
发明人： Hikaru UMINO
IPC分类号： H02P21/24 , H02P27/12 , H02P21/22 , H02P25/022
CPC分类号： H02P21/24 , H02P27/12 , H02P21/22 , H02P25/022
摘要： An AC motor control device controls an inverter that supplies an alternating current to an AC motor which is a three-phase permanent magnet synchronous motor. The AC motor control device includes: pulse width modulation signal generation means that supplies a pulse width modulation signal to the inverter so that a position detection voltage vector for detection of the position of the rotor of the AC motor is applied to the AC motor; current derivative detection means that detects a current derivative occurring due to application of the position detection voltage vector to the AC motor; rotor position computation means that computes an estimated position of the rotor of the AC motor; rotor position correction means that corrects the estimated position; and drive control means that controls the pulse width modulation signal generation means so as to drive the AC motor.
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公开(公告)号：US11870377B2
公开(公告)日：2024-01-09
申请号：US16724914
申请日：2019-12-23
申请人： Quantentech Limited
发明人： Hengchun Mao
摘要： A system includes a motor having a plurality of windings, a rotor and a stator magnetically coupled to the rotor, a plurality of power inverters connected to respective windings, wherein the plurality of power inverters is configured to control currents of the plurality of windings, and a controller configured to determine an injection ratio of a high-order harmonic component to a fundamental component based on a performance index, and wherein the injection ratio for a magnetizing component is different from the injection ratio for a torque component at a same harmonic frequency.
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公开(公告)号：US20230421082A1
公开(公告)日：2023-12-28
申请号：US18253001
申请日：2021-11-09
发明人： Akihiko HOUDA
摘要： A motor control device controls an AC motor by sensorless control. The motor control device includes: an inverter; a multilayer printed circuit board including an inner layer having a wiring pattern provided in a current line connecting the inverter to a winding of the AC motor; a plurality of chip inductors mounted on a major surface of the multilayer printed circuit board in opposed relation to the wiring pattern, and connected in series to form a series circuit having a midpoint connected to a reference potential; load resistors connected between the midpoint of the series circuit and the opposite ends of the series circuit; a differential amplification circuit connected to the series circuit; and a control unit that estimates the position of the rotor of the AC motor by using an output of the differential amplification circuit, and generates the pulse width modulation signal to be supplied to the inverter.
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公开(公告)号：US11637518B2
公开(公告)日：2023-04-25
申请号：US17477690
申请日：2021-09-17
申请人： MINEBEA MITSUMI Inc.
发明人： Hiroki Kokubo , Shinji Totsuka , Shigemi Masuda
摘要： A motor drive control device includes a drive circuit configured to drive a motor with a drive control signal for driving the motor, and a control circuit configured to perform a vector control arithmetic operation based on a detection result of drive currents of coils of the motor, to generate the drive control signal and supply the drive control signal to the drive circuit. When generating the drive control signal, the control circuit estimates a rotation angle of a rotor of the motor and a rotation speed of the rotor with a q-axis current value of a two-phase rotating coordinate system calculated with a detection result of the drive current, and a q-axis voltage command value of the two-phase rotating coordinate system, by using a linear Kalman filter including a prediction step and an update step, using a stationary Kalman filter with the prediction step expressed linearly and time-invariantly.
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公开(公告)号：US20230029185A1
公开(公告)日：2023-01-26
申请号：US17380564
申请日：2021-07-20
摘要： A method for mitigating voltage disturbances at a point of interconnection (POI) of a grid-forming inverter-based resource (IBR) due to flicker includes receiving a voltage reference command and a voltage feedback. The voltage feedback contains information indicative of the voltage disturbances at the POI due to the flicker. The method also includes determining a power reference signal for the IBR based on the voltage reference command and the voltage feedback. Moreover, the method includes generating a current vector reference signal based on the power reference signal, the current vector reference signal containing a frequency component of the voltage disturbances. Further, the method includes generating a transfer function of a regulator based on the frequency component to account for the flicker effect. In addition, the method includes generating a current vector based on a comparison of the current vector reference signal and a current vector feedback signal. Thus, the method includes regulating a voltage vector command using the current vector to mitigate the voltage disturbances.
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公开(公告)号：US11527978B2
公开(公告)日：2022-12-13
申请号：US17347753
申请日：2021-06-15
摘要： A method of determining angular position (θ) of a rotor of an N-phase permanent magnet motor (PMM). A processor having an associated stored angular position determination (APD) algorithm is programmed to implement the algorithm to cause an associated motor controller to execute steps including forcing one vector at a time a phase vector set of current or voltage vectors to stator terminals of windings for the N-phases a positive and negative magnitude vector, wherein the vector magnitude is sufficiently small to not move the rotor, and a time duration for the forcing current or voltage vectors is essentially constant. The resulting stator current or voltage levels are measured for each current or voltage vector. An N-dimension current vector or voltage vector is generated from superposition of the resulting stator current levels or resulting stator voltage levels. The N-dimension current vector or voltage vector is used to determine angular position.
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公开(公告)号：US11437944B2
公开(公告)日：2022-09-06
申请号：US17254686
申请日：2019-05-29
发明人： Kazuaki Tobari , Yoshitaka Iwaji , Agnes Hadinata , Yusaku Onuma , Takuya Sugimoto , Atsuhiko Nakamura , Hiroshi Watanabe , Yoshiyuki Taguchi
摘要： A power conversion device includes a harmonic voltage generation unit that superimposes dc-axis and qc-axis harmonic voltages on dc-axis and qc-axis voltage commands in accordance with a switching signal; and an inductance estimation unit that estimates dc-axis inductance and qc-axis inductance on a basis of dc-axis and qc-axis harmonic currents, amplitude values of the harmonic voltages, and the switching signal.
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公开(公告)号：US20210320604A1
公开(公告)日：2021-10-14
申请号：US17273431
申请日：2019-09-03
申请人： ADVICS CO., LTD.
发明人： Hikaru KAWAMURA , Tomoya TAKAHASHI
IPC分类号： H02P21/18 , H02P21/24 , H02P21/22 , H02P6/18 , G01R19/165
摘要： A motor control device includes an acquisition unit that obtains a q-axis current component of a current vector generated when electricity is supplied to a brushless motor to generate a voltage vector along a direction of an estimated d-axis; a correction unit that corrects the direction of the estimated d-axis according to the q-axis current component to approach the direction of the estimated d-axis approach to the direction of the actual d-axis; and a control axis changing unit that changes the estimated d-axis direction by a prescribed angle when a magnitude of the q-axis current component is less than a threshold value by the correction of the direction of the estimated d-axis by the correction unit for the first time after the control axis setting control start or when a magnitude of the q-axis current component is less than the threshold value at the control axis setting control start.
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公开(公告)号：US11114966B2
公开(公告)日：2021-09-07
申请号：US16861391
申请日：2020-04-29
申请人： Danfoss Editron Oy
发明人： Anssi Sakari Sinervo
摘要： A device for estimating a rotation speed and/or a direction of rotation of an induction machine is presented. The device controls stator voltages (uu, uv, uw) of the induction machine so that a voltage space-vector constituted by the stator voltages has a fixed direction and a current space-vector constituted by stator currents (iu, iv, iw) of the induction machine has a pre-determined length or a predetermined d-component. The rotation speed and/or the direction of rotation is/are estimated based on a waveform of a q-component of the current space-vector, where the d-component of the current space-vector is parallel with the voltage space-vector and the q-component of the current space-vector is perpendicular to the voltage space-vector. The device is usable when the induction machine does not have enough magnetic flux for flux-based determination of the rotation speed and/or the direction of rotation.
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公开(公告)号：US10651768B2
公开(公告)日：2020-05-12
申请号：US16523468
申请日：2019-07-26
申请人： LG ELECTRONICS INC.
发明人： Yonghwa Lee , Donggeun Lee , Jeongeon Oh
IPC分类号： H02M7/5387 , H02P6/17 , H02P6/18 , H02P21/24 , H02P27/08
摘要： Provided are a motor control device and a method for controlling a motor control device. A switching frequency is varied with respect to a control sampling for controlling an inverter, whereby controlling is performed by securing a required control sampling according to a motor speed.
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