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公开(公告)号：US20240388238A1
公开(公告)日：2024-11-21
申请号：US18650685
申请日：2024-04-30
Applicant: HYUNDAI MOBIS CO., LTD.
Inventor： Sang Min KIM , Jin Qyu SEO
IPC: H02P29/66
Abstract: A system for estimating a temperature of a permanent magnet of a rotor of a motor including a first determination unit configured to determine whether a rotational speed of the rotor is greater than or equal to a reference speed, a second determination unit configured to determine whether a current flowing in a coil included in the motor is less than a reference current, and whether a magnitude of q-axis energy of the motor is less than a reference energy magnitude, when the rotational speed is greater than or equal to the reference speed, a magnetic flux map temperature estimation unit configured to estimate the temperature of the permanent magnet using a d-axis magnetic flux map of the motor responsive to conditions being satisfied, and an energy map temperature estimation unit configured to estimate the temperature responsive to conditions not being satisfied in the second determination unit.
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公开(公告)号：US11863093B2
公开(公告)日：2024-01-02
申请号：US17761657
申请日：2020-08-20
Applicant: Nidec Corporation
Inventor： Tomohiro Fukumura , Linfeng Lan
Abstract: A first torque estimator determines a first torque estimation value according to a cross product method, and a second torque estimator determines a second torque estimation value according to an energy method. A torque weight adjuster adjusts, using a weighting coefficient calculated in accordance with a predetermined condition, weightings respectively applied to these two types of torque estimation values, and outputs a torque estimation value.
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公开(公告)号：US11736057B2
公开(公告)日：2023-08-22
申请号：US17926501
申请日：2021-05-07
Applicant: Siemens Aktiengesellschaft
Inventor： Horst Geyer
IPC: H02P29/66
CPC classification number: H02P29/664
Abstract: An arrangement for determining a temperature of an electric machine includes a supply unit for operating the electric machine, with a first temperature of the electric machine computed with a first thermal model of the electric machine in the supply unit, and a computing facility connected to the supply unit by way of a data transmission channel, with a second temperature of the electric machine computed with a second thermal model of the electric machine in the computing facility. The supply unit and the computing facility communicate by way of the data transmission channel so as to enable the computing facility to determine the second temperature of the electric machine with the second thermal model even when no current is supplied to the supply unit.
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公开(公告)号：US20230188081A1
公开(公告)日：2023-06-15
申请号：US17926501
申请日：2021-05-07
Applicant: Siemens Aktiengesellschaft
Inventor： Horst Geyer
IPC: H02P29/66
CPC classification number: H02P29/664
Abstract: An arrangement for determining a temperature of an electric machine includes a supply unit for operating the electric machine, with a first temperature of the electric machine computed with a first thermal model of the electric machine in the supply unit, and a computing facility connected to the supply unit by way of a data transmission channel, with a second temperature of the electric machine computed with a second thermal model of the electric machine in the computing facility. The supply unit and the computing facility communicate by way of the data transmission channel so as to enable the computing facility to determine the second temperature of the electric machine with the second thermal model even when no current is supplied to the supply unit.
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公开(公告)号：US20230163715A1
公开(公告)日：2023-05-25
申请号：US17920036
申请日：2020-06-05
Applicant: Mitsubishi Electric Corporation
Inventor： Yuichiro NAKAMURA , Yuya TSUCHIMOTO
CPC classification number: H02P29/662 , H02P21/141
Abstract: A motor temperature and torque estimation device comprises: a temperature sensor; a losses estimation circuitry to estimate an iron loss; a first temperature estimation circuitry to estimate a first magnet temperature from the estimated iron loss and a sensor's detected temperature; a second temperature estimation circuitry, to input into a magnet's magnetic flux calculator thereinside motor's modified inductance, to estimate a second magnet temperature from magnet's magnetic flux calculated through voltage equations; a magnet-temperature estimation circuitry to estimate a motor's magnet temperature from the first and second magnet temperatures; a magnet's magnetic estimation circuitry to estimate magnetic flux based on the calculated/modified one, the motor's estimated magnet temperature and temperature characteristics, and to output the estimated magnetic flux into the losses estimator; and a torque estimation circuitry to estimate torque based on the estimated magnetic flux and iron loss, wherein a motor's magnet temperature(s) and torque are estimated.
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Patent Agency Ranking
公开(公告)号：US11482964B2
公开(公告)日：2022-10-25
申请号：US16766235
申请日：2018-11-23
Applicant: Rolls-Royce Deutschland Ltd & Co KG
Inventor： Behnam Houshmand , Christian Loesch , Markus Sons
Abstract: The disclosure relates to a redundant electric machine for driving a propulsion means with increased operational safety. The machine may include two systems, with each system including a stator winding system and a rotor assigned thereto with permanent magnets, wherein the rotors are fastened on a common shaft for driving the propulsion means. If a fault occurs in one of the stator winding systems, the rotor, which continues to rotate, has to be prevented from inducing electric voltages in the stator winding system because this may lead to a fire in the machine. A demagnetization apparatus is therefore provided which, in a targeted manner, demagnetizes the permanent magnets of the rotor assigned to the faulty stator winding system such that the inducing of electric voltages is prevented.
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公开(公告)号：US20220149768A1
公开(公告)日：2022-05-12
申请号：US17454348
申请日：2021-11-10
Applicant: Valeo Siemens eAutomotive Germany GmbH
Inventor： Alexander Rambetius
IPC: H02P29/66 , H02P27/06 , H02M7/5387 , B60L15/20
Abstract: The inverter (110) comprises input terminals (IT+, IT−), output terminals (OT), controllable switches (Q, Q′) connected to the input terminals (IT+, IT−) and to the output terminals (OT) and a control device (116) configured to control the controllable switches (Q, Q′) so as to convert a DC voltage at the input terminals (IT+, IT−) into an AC voltage at the output terminals (OT) intended to drive an asynchronous electric motor (108) to achieve a target torque (T*), selectively: in a first mode of operation in which the target torque (T*) is determined according to a torque determination method, and in response to a rotor temperature (Tr), in a second mode of operation in which losses in the rotor are decreased relative to the first mode of operation while the target torque (T*) remains determined according to the torque determination method of the first mode of operation.
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公开(公告)号：US20220069760A1
公开(公告)日：2022-03-03
申请号：US17342795
申请日：2021-06-09
Applicant: Mitsubishi Electric Corporation
Inventor： Hitoshi ISODA , Shinsuke KAYANO , Kengo KUMAGAI , Noriyuki WADA
Abstract: To provide a controller for rotary electric machine which can estimate a transitional temperature with good accuracy, while considering the heating amount and the heat radiation amount due to copper loss and iron loss which change according to the operating point of rotational speed and torque, and suppressing the increase in arithmetic load. A controller for rotary electric machine, at calculation timing of every estimation calculation period, by referring to a temperature prediction data in which a relationship among a rotational speed, a torque information, a temperature at a reference time point, and a temperature after lapse of the estimation calculation period from the reference time point, calculates an estimation value of temperature after lapse of the estimation calculation period from the last time calculation timing, corresponding to the present rotational speed, the present torque information, and the estimation value of temperature calculated at the last time calculation timing.
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公开(公告)号：US11260829B2
公开(公告)日：2022-03-01
申请号：US16482536
申请日：2018-01-31
Applicant: DENSO CORPORATION
Inventor： Yuta Doi
Abstract: A wiper motor control circuit carries out control in which a driving circuit generates, and supplies to a wiper motor, a voltage that eliminates deviation between a target speed and an actual speed of an output shaft. In a case in which a state in which the deviation between the target speed and the actual speed is greater than or equal to a predetermined threshold value continues for a predetermined time or more, the wiper motor control circuit carries out control that lowers the target speed and in which the driving circuit generates, and supplies to the wiper motor, a voltage that eliminates deviation between the lowered target speed and the actual speed of the output shaft.
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10.发明申请公开(公告)号：US20210234495A1
公开(公告)日：2021-07-29
申请号：US17131064
申请日：2020-12-22
Applicant: Mazda Motor Corporation
Inventor： Nobuhide Seo , Genri Suzuki
Abstract: A magnet temperature estimating device for a motor including a rotor having magnets and configured to output a rotational motive force, and a stator having a plurality of coils opposing the rotor with a gap therebetween, is provided. The device includes a sensor configured to detect an induced voltage induced by rotation of the rotor, and a controller configured to control the motor by supplying power to the plurality of coils in response to an input of a detection signal from the sensor. Gaps adjacent to each magnet in a rotation direction of the rotor are formed in the rotor. The controller estimates a temperature of the magnet based on the induced voltage detected when the magnet opposes any one of the plurality of coils, according to the rotation of the rotor.
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