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公开(公告)号：US20170179859A1
公开(公告)日：2017-06-22
申请号：US15450999
申请日：2017-03-06
IPC分类号： H02P6/14 , G01R31/34 , H02P21/14 , H02P29/66 , H02P29/024
CPC分类号： H02P6/14 , G01R31/34 , G01R31/343 , H02P21/14 , H02P21/141 , H02P29/024 , H02P29/60 , H02P29/662
摘要： Techniques for motor magnet degradation controls and diagnostics are disclosed. An exemplary technique determines q-axis current, d-axis current, q-axis voltage, and/or d-axis voltage of a permanent magnet motor based upon sensed current and voltage information of the motor. This information is utilized to determine flux information. The flux information is utilized in evaluating collective state conditions of a plurality of motor magnets and evaluating localized state conditions of a subset of the plurality of motor magnets. The evaluations can be used to identify degradation or damage to one or more of the magnets which may occur as a result of elevated temperature conditions, physical degradation, or chemical degradation.
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公开(公告)号：US09660560B2
公开(公告)日：2017-05-23
申请号：US14780689
申请日：2014-03-26
申请人： TRW Limited
CPC分类号： H02P6/153 , H02P6/15 , H02P21/0089 , H02P21/22 , H02P29/662
摘要： A drive system for a brushless DC motor having a rotor includes at least one permanent magnet and a stator including at least one phase winding. The system has a drive circuit including a switch associated with the winding for varying the current passing through the winding; a rotor position sensor arranged to sense the position of the rotor; and a controller arranged to provide drive signals to control the switch. The drive system is further arranged to receive a temperature signal that has a value dependent upon the temperature of the at least one magnet of the rotor. The controller is arranged to vary the phase of the current passing through the winding relative to the rotor position dependent upon the temperature of the rotor magnet.
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公开(公告)号：US09628017B2
公开(公告)日：2017-04-18
申请号：US14429184
申请日：2012-10-11
CPC分类号： H02P29/67 , B60L3/12 , B60L2240/425 , B60L2240/427 , B60L2260/44 , H02P29/02 , H02P29/662 , Y02T10/642
摘要： In order to highly accurately estimate a temperature of a permanent magnet to be used for a rotor of a motor, provided is a motor control device for a vehicle including a motor as a drive power source, in which an estimation mode setting section sets, when a predetermined condition for estimating the temperature of the permanent magnet to be used for the rotor of the motor is established under a state in which the motor generates drive power to run the vehicle, a current flowing through the motor to 0, and a permanent magnet temperature estimation section estimates the temperature of the permanent magnet based on an induced voltage of the motor in a period during which the current flowing through the motor is 0.
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公开(公告)号：US20230251606A1
公开(公告)日：2023-08-10
申请号：US17920196
申请日：2021-04-20
CPC分类号： G05B13/021 , G05B17/02 , H02P29/66
摘要： A system, apparatus and method for managing an electromechanical system is provided. In an embodiment, the method includes receiving, by a processing unit, operational data associated with the electromechanical system from one or more sensing units in real-time. Furthermore, the method includes detecting an event associated with a power supplied to the electromechanical system based on the operational data. Also, the method includes configuring a virtual replica of the electromechanical system using the operational data, based on the event detected. Additionally, the method further includes generating one or more simulation results by simulating the configured virtual replica in a simulation environment. Moreover, the method includes predicting an effect on the electromechanical system due to the event based on the simulation results.
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公开(公告)号：US11652438B2
公开(公告)日：2023-05-16
申请号：US17684899
申请日：2022-03-02
发明人： Tomoya Nagano
CPC分类号： H02P29/662 , G01K13/08 , H02P23/0018 , H02P2207/05
摘要： Parameters relating to rotation of a motor (2) measured every constant time are acquired and the moving average of each constant interval of the parameters is calculated. The calculated moving averages are input to a training model trained so as to output a temperature of magnets attached to a rotor (7) of the motor (2) when the moving averages of the parameters relating to rotation of the motor (2) are input, and an estimated value of the magnet temperature output from the model is acquired. Next, the acquired estimated value of the magnet temperature is output.
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公开(公告)号：US20230140421A1
公开(公告)日：2023-05-04
申请号：US17913158
申请日：2020-06-03
发明人： Shota KONDO , Masahiro IEZAWA
摘要： A rotating machine control device for controlling a rotating machine having a stator winding and a field winding includes a current command generation unit which generates a current command value on the basis of the temperature of the rotating machine. The current command generation unit includes a constraint condition setting unit which calculates a constraint condition on the basis of a torque command, stator winding voltage, stator winding current, and field winding current, an optimization calculation unit which calculates and outputs the current command value, using the constraint condition and an evaluation function, and a constraint condition update unit which updates the constraint condition on the basis of the temperature of the rotating machine. The current command generation unit calculates and outputs the current command value, using the updated constraint condition.
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公开(公告)号：US20230134487A1
公开(公告)日：2023-05-04
申请号：US17841291
申请日：2022-06-15
发明人： Hayato TANABE
IPC分类号： H02P29/66
摘要： An electric motor control device includes an inverter circuit, which has a power conversion circuit configured of six switching elements, and a switching control circuit that controls the switching elements in such a way as to be turned on or off, wherein, when it is determined that the inverter circuit is in an abnormal state, an execution of a three-phase short-circuiting process, whereby all upper side switching elements or all lower side switching elements are turned on, or a six-switch opening process, whereby all the switching elements are turned off, is selected based on a temperature of at least one permanent magnet of an electric motor, in accordance with an operating state of the electric motor.
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公开(公告)号：US11575341B1
公开(公告)日：2023-02-07
申请号：US17514239
申请日：2021-10-29
发明人： Wei Zeng , Scott E. Parrish , Jeffrey Wentz Yambor , Young J. Kim
摘要： A method for predicting a rotor temperature of an electric motor for an electric vehicle. The method includes measuring at least one of an operating parameter of the electric motor; inputting the at least one of the operating parameter of the electric motor into a predetermined regression model to predict a rotor temperature of the electric motor; and communicating the rotor temperature of the electric motor to a vehicle control module for managing the electric motor. The operating parameters includes a measured stator temperature, a torque level output, a rotor speed, and a coolant flowrate of the fixture electric motor. The electric motor may be that of an induction motor.
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公开(公告)号：US11558003B2
公开(公告)日：2023-01-17
申请号：US16765137
申请日：2018-10-10
申请人： Robert Bosch GmbH
发明人： Alexander Rosen , Michael Bangerter
摘要： The invention relates to a method and device for operating an electric machine (10) for outputting a predefined torque and a predefined rotational speed, comprising the following steps: providing (420) a first and a second operating mode for the operation of the electric machine (10); detecting (430) a temperature of the electric machine (10); and operating the electric machine (10) in the first operating mode (440) if the detected temperature falls below a threshold value, and operating the electric machine (10) in the second operating mode (450) if the detected temperature corresponds with the threshold value or exceeds same. During the operation of the electric machine (10) in the second operating mode (450), with the resulting output of the predefined torque and the predefined rotational speed, the magnetic stator flux of the electric machine (10) is reduced compared with the magnetic stator flux of the electric machine (10) during the operation of the electric machine (10) in the first operating mode (440), with the resulting output of the predefined torque and the predefined rotational speed.
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公开(公告)号：US20220376320A1
公开(公告)日：2022-11-24
申请号：US17877208
申请日：2022-07-29
发明人： Xiaojian HUANG , Zhimin DAN , Bao LI , Xiyang ZUO
IPC分类号： H01M10/63 , H01M10/615 , H01M10/625 , H01M10/48 , H02P29/66 , B60L58/27 , G01K3/00 , G01K3/10 , G01R31/34
摘要： Disclosed is a traction battery self-heating control method and a device. Acquiring a second temperature of a rotor at a current sampling time according to system parameters and a first temperature of the rotor at a previous sampling time, and estimating a third temperature of the rotor at a next sampling time according to the first temperature and the second temperature, and stopping the self-heating of the traction battery when the third temperature reaches a demagnetization temperature of the rotor. Whether to stop the self-heating of the traction battery is determined by estimating a rotor temperature under the self-heating condition, and comparing the rotor temperature with the demagnetization temperature of the rotor, and thus the self-heating control of the traction battery is realized.
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