公开(公告)号：US20240243679A1

公开(公告)日：2024-07-18

申请号：US18574399

申请日：2022-06-02

申请人： Schaeffler Technologies AG & Co. KG

发明人： Jochen Reith ,  Jiufang Peng ,  Jurgen Eich

IPC分类号： H02P21/20 ,  H02P21/14 ,  H02P27/06

CPC分类号： H02P21/20 ,  H02P21/141 ,  H02P27/06

摘要： The present disclosure relates to a method for estimating a torque of an electric machine, comprising the following steps: estimating a first torque using a first method by forming a cross product from an estimated magnetic flux of the electric machine and an actual current of the electric machine, estimating a second torque using a second method by determining a power balance which can be calculated with the aid of a difference between an AC output power of an inverter, which is connected to the electric machine, and a total power loss of the electric machine, and determining the final torque as a weighted average from the first torque, which is weighted with a first weighting, and the second torque, which is weighted with a second weighting. The present disclosure also relates to a control unit for carrying out this method and to an electrical traction drive having such a control unit.

公开(公告)号：US11929693B2

公开(公告)日：2024-03-12

申请号：US17788295

申请日：2019-12-31

申请人： MAVEL EDT S.P.A.

发明人： Denny Chiono

IPC分类号： H02P6/08 ,  H02P21/18 ,  H02P21/20 ,  H02P21/22 ,  H02P27/06

CPC分类号： H02P21/20 ,  H02P6/08 ,  H02P21/18 ,  H02P21/22 ,  H02P27/06 ,  H02P2207/05

摘要： A control method of an electric machine is described, including a first step of detecting the angular position of a rotor of the electric machine; a second step of detecting the values of the alternate current next to at least two phases of the input current to the electric machine; a third step of detecting the values of voltage and direct current supplied as input to the inverter by the electric supply means; a fourth step of estimating the torque supplied by the electric machine performed by processing data detected in the first and second step; a fifth step of computing the torque supplied by the electric machine performed by processing data detected in the third and first step; a sixth step of comparing the value of the computed torque and the value of the estimated torque; a control system and a motor comprising such system are further described.

公开(公告)号：US20240079981A1

公开(公告)日：2024-03-07

申请号：US18074276

申请日：2022-12-02

申请人： Delta Electronics, Inc.

发明人： Chih-Hung Hsiao ,  Chung-Hsing Ku ,  Shang-Wei Chiu ,  Zhi-Sheng Yang

IPC分类号： H02P21/22 ,  H02P21/20

CPC分类号： H02P21/22 ,  H02P21/20

摘要： A motor drive system includes an electric motor, a drive circuit and a control unit. The drive circuit provides a driving current to the electric motor. A current command generator of the control unit generates a current command according to a torque command and a motor operating information. The driving current is converted into a d-axis current and/or a q-axis current by the control unit. Consequently, the driving current is close to the d-axis current command and/or the q-axis current command corresponding to the current command. If a value of the torque command is positive, the current command generator generates the corresponding current command according to a MTPA lookup table. If the value of the torque command is negative, the current command generator generates the corresponding current command according to a zero recycle lookup table.

公开(公告)号：US11750128B2

公开(公告)日：2023-09-05

申请号：US17834385

申请日：2022-06-07

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Taro Takahashi ,  Akira Hatano ,  Naoki Mima

IPC分类号： H02P21/20 ,  G01L3/24 ,  H02P6/17 ,  H02P6/04

CPC分类号： H02P21/20 ,  G01L3/24 ,  H02P6/04 ,  H02P6/17 ,  H02P2203/03 ,  H02P2203/09

摘要： An external force estimation device is configured to estimate an external force acting on a motor. The external force estimation device includes a processor. The processor is configured to: calculate an output torque of the motor by using a value of a current supplied to the motor; estimate an inertia torque of the motor by using rotational position information of the motor; estimate a first friction torque of the motor by using the rotational position information of the motor; perform temperature-based correction for the first friction torque by using temperature information of the motor; and estimate the external force by subtracting the inertia torque and the first friction torque after the temperature-based correction from the output torque.

公开(公告)号：US20230216439A1

公开(公告)日：2023-07-06

申请号：US18008675

申请日：2020-08-05

申请人： Mitsubishi Electric Corporation

发明人： Shinichi FURUTANI ,  Shoji ADACHI

IPC分类号： H02P21/10 ,  H02P21/20 ,  H02P29/032 ,  G01R19/00

CPC分类号： H02P21/10 ,  G01R19/0092 ,  H02P21/20 ,  H02P29/032

摘要： A motor iron-loss calculation device calculates an iron-loss value of a motor on the basis of a primary frequency and a q-axis current component in a dq-axis rotating coordinate system having a d axis in a rotor magnetic flux direction of the motor.

公开(公告)号：US11671043B2

公开(公告)日：2023-06-06

申请号：US17337174

申请日：2021-06-02

申请人： Hella GmbH & Co. KGaA

发明人： Jean Doucement

IPC分类号： H02P21/20 ,  H02P21/13

CPC分类号： H02P21/20 ,  H02P21/13

摘要： A torque monitoring device is provided for a brushless AC motor. The device comprises an observer having inputs for voltages (Va, Vb, Vc) across windings of the brushless AC motor, having an input for an angular velocity (ωs) of a rotor of the brushless AC motor, and an input for a pole wheel angle (θs) of the brushless AC motor.

公开(公告)号：US11648840B2

公开(公告)日：2023-05-16

申请号：US16725423

申请日：2019-12-23

申请人： Mitsubishi Electric Corporation

发明人： Takafumi Ichikawa ,  Masahiro Iezawa ,  Noriyuki Wada ,  Kotaro Nakano

IPC分类号： B60L50/51 ,  B60L15/02 ,  B60L50/13 ,  H02P21/20 ,  H02P29/02 ,  B60K7/00 ,  B60L50/15 ,  H02M7/00 ,  H02M1/00 ,  H02J7/00

CPC分类号： B60L50/51 ,  B60K7/0007 ,  B60L15/025 ,  B60L50/13 ,  B60L50/15 ,  H02P21/20 ,  H02P29/02 ,  B60L2210/40 ,  H02J7/00 ,  H02M1/00 ,  H02M7/00

摘要： There has been a drawback in that current command values need to be set for a current command unit of a power conversion device in accordance with efficiency, and thus the number of operation steps increases. In the power conversion device connected between a three-phase AC rotating machine and a DC power supply and configured to convert DC power into AC power, a DC voltage value, of the DC power supply, that is to be inputted to a current command unit of the power conversion device is corrected on the basis of an efficiency index, and a current command value to be outputted by the current command unit is changed on the basis of the corrected DC voltage value and a torque command value, whereby the efficiencies of the power conversion device and the three-phase AC rotating machine are controlled.

公开(公告)号：US20190199257A1

公开(公告)日：2019-06-27

申请号：US16287601

申请日：2019-02-27

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： Mitsuhiro SAKAMOTO ,  Yasuyuki YOKOUCHI ,  Daisuke SONODA ,  Ryuta SASAKI

IPC分类号： H02P21/00 ,  H02P6/10 ,  H02P21/20 ,  H02P23/00

CPC分类号： H02P21/0025 ,  H02P6/08 ,  H02P6/10 ,  H02P21/00 ,  H02P21/20 ,  H02P23/0031 ,  H02P27/06 ,  H02P2205/05

摘要： A motor control device at least includes a speed control part for controlling a motor rotation speed. The motor control device includes a torque correction means for suppressing variation in torque constant due to individual differences of motors. In addition, the motor control device corrects the torque constant by using a correction torque coefficient calculated based on an unloaded speed when a fixed voltage is applied. Alternatively, the torque constant is corrected using the correction torque coefficient calculated based on the motor applied voltage when the motor speed is fixed.

公开(公告)号：US20190190431A1

公开(公告)日：2019-06-20

申请号：US16216710

申请日：2018-12-11

申请人： JTEKT CORPORATION

发明人： Hiroshi SUMASU

IPC分类号： H02P27/08 ,  H02P21/20 ,  H02P21/22 ,  B62D5/04

CPC分类号： H02P27/085 ,  B62D5/0463 ,  H02P21/20 ,  H02P21/22 ,  H02P27/08

摘要： A motor control unit includes a PWM count calculator, a PWM count setter, and a PWM count changer. The PWM count calculator calculates first PWM counts of phases. Each first PWM count is calculated for a current control period. The PWM count setter sets the first PWM count of each phase as a second PWM count of a corresponding phase. The second PWM count is set for each of PWM periods included in the current control period. The PWM count changer changes the second PWM count of at least one of the phases, without changing the total of the second PWM counts of the at least one phase within the current control period, such that the number of times switching elements corresponding to the at least one phase are switched within the current control period is reduced.

公开(公告)号：US20190074787A1

公开(公告)日：2019-03-07

申请号：US16051597

申请日：2018-08-01

申请人： Schneider Toshiba Inverter Europe SAS

发明人： Al Kassem JEBAI ,  Francois MALRAIT ,  Thomas DEVOS ,  Alain DUTREY

IPC分类号： H02P21/14 ,  H02P23/14 ,  H02P21/18 ,  H02P21/20 ,  H02P21/22

CPC分类号： H02P21/141 ,  H02P21/14 ,  H02P21/18 ,  H02P21/20 ,  H02P21/22 ,  H02P23/14 ,  H02P2207/01

摘要： A method identifies magnetic saturation parameters of an asynchronous electric motor. The method consists in a monitoring and identification sequence including one or several iterations. The method includes applying at the input of the control law of a reference voltage or a reference flux trajectory or a reference range in order to obtain a magnetization current, building a real profile of magnetic saturation including estimate magnetization flux and measures magnetization current, and determining magnetic saturation parameters corresponding to the real profile already obtained.