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公开(公告)号：US20240297602A1
公开(公告)日：2024-09-05
申请号：US18351652
申请日：2023-07-13
Applicant: Deere & Company
Inventor： Scott C. Johnson , Andrew W. Kelly , Derek Lehmann
CPC classification number: H02P21/36 , H02P21/16 , H02P21/18 , H02P21/22 , H02P2207/05
Abstract: In accordance with one embodiment, a method of controlling a braking of a rotor of an electric motor comprises operating an electric motor in a first mode at an inefficient operating point or inefficient operating curve of a quadrature-axis current versus a direct-axis current such that the braking of the electric motor occurs at a rate based on a rate proportional to or less than the total available power losses in the motor, the inverter, or both. The electric motor is operated in the first mode until the observed rotor speed of the electric motor is less than or equal to a threshold speed; thereafter a multi-phase short circuit can be applied.
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公开(公告)号：US11689131B2
公开(公告)日：2023-06-27
申请号：US17643873
申请日：2021-12-13
Applicant: Deere & Company
Inventor： Yiqi Liu , Long Wu , Zack M. Day
CPC classification number: H02P21/22 , H02P21/09 , H02P21/13 , H02P21/18 , H02P21/34 , H02P21/36 , H02P27/12
Abstract: A system and method for controlling an electric machine via an inverter comprises an speed estimator that is configured to estimate a rotor speed of an electric motor to determine whether to control the inverter to operate the electric motor in a first mode or a second mode. For example, the first mode comprises a current-frequency control mode and the second mode comprises a back electromagnetic force (BEMF) mode. An electronic data processor or controller is configured to determine a first (current) command associated with a first mode of operating the electric motor, if the estimated rotor speed is a less than a speed threshold. The electronic data processor or controller is configured to determine a second (current) command associated with a second mode of operating the electric motor if the estimated rotor speed is equal to or greater than the speed threshold.
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公开(公告)号：US20230163707A1
公开(公告)日：2023-05-25
申请号：US18052778
申请日：2022-11-04
Applicant: Rosemount Aerospace Inc.
Inventor： Muthukumar Murthy , Ashok Kumar Thirunarayana , Srividya Aryasomayajula , Rohini Kundanagar
CPC classification number: H02P21/36 , B64C1/1484 , H02P21/18 , H02P21/22 , H02P27/12
Abstract: A windshield wiper system includes a three-phase motor, the three-phase inverter, a brake circuit, and a controller. The controller transmits commutation signals to the three-phase inverter to drive the motor according to an inboard-to-outboard speed profile and to drive the motor according to an outboard-to-inboard speed profile. The controller activates the brake circuit based on the inboard-to outboard speed profile, or the outboard-to-inboard speed profile, and a direct current bus voltage.
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公开(公告)号：US20170359006A1
公开(公告)日：2017-12-14
申请号：US15689937
申请日：2017-08-29
Applicant: NIDEC MOTOR CORPORATION
Inventor： Darko Marcetic , Mile Bozic
Abstract: An electric motor control system includes a power inverter and control circuitry configured to control the power inverter either according to a target voltage in a voltage-based control mode or according to a target current in a current-based control mode. A controller is operable to switch operation of the control circuitry between the voltage-based control mode and the current-based control mode. The controller may be configured to operate the control circuitry in the current-based control mode at lower motor operating speeds where stator current margin is of greater significance, and to operate the control circuitry in the voltage-based control mode at higher motor operating speeds where stator voltage margin is of greater significance.
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公开(公告)号：US09780701B2
公开(公告)日：2017-10-03
申请号：US14985225
申请日：2015-12-30
Applicant: Nidec Motor Corporation
Inventor： Darko Marcetic , Mile Bozic
Abstract: An electric motor control system includes a power inverter and control circuitry configured to control the power inverter either according to a target voltage in a voltage-based control mode or according to a target current in a current-based control mode. A controller is operable to switch operation of the control circuitry between the voltage-based control mode and the current-based control mode. The controller may be configured to operate the control circuitry in the current-based control mode at lower motor operating speeds where stator current margin is of greater significance, and to operate the control circuitry in the voltage-based control mode at higher motor operating speeds where stator voltage margin is of greater significance.
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Patent Agency Ranking
公开(公告)号：US20160359432A1
公开(公告)日：2016-12-08
申请号：US15171690
申请日：2016-06-02
Applicant: LSIS CO., LTD.
Inventor： Deok-Young LIM , Chun-Suk YANG
Abstract: In some embodiments, an inverter control apparatus and a method for controlling the same are provided. The inverter control apparatus may speed up the discharging of the residual energy at an inverter driven with an input power when a safety signal is input to the inverter. The inverter control apparatus may include an input power switchgear supplying an input power to the inverter according to switching operation; an I/O unit inputting a safety signal to the inverter according to a user control input and outputting a failure output relay signal to the input power switchgear when the safety signal is generated; and a controller performing speeding up the discharge of residual energy at the inverter when the input power is interrupted.
Abstract translation: 在一些实施例中，提供了一种逆变器控制装置及其控制方法。 当安全信号输入到逆变器时，逆变器控制装置可以加速由输入功率驱动的逆变器的剩余能量的放电。 逆变器控制装置可以包括根据切换操作向逆变器提供输入电力的输入电力开关装置; I / O单元，根据用户控制输入向变频器输入安全信号，并在产生安全信号时向输入功率开关装置输出故障输出继电器信号; 以及控制器，当输入电力中断时，执行加速在逆变器处的剩余能量的放电。
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公开(公告)号：US09287808B2
公开(公告)日：2016-03-15
申请号：US14289957
申请日：2014-05-29
Inventor： Takeo Ito , Hideaki Moriya , Takeshi Tomizaki , Akira Nakazumi , Yusuke Kamimura
CPC classification number: H02P3/18 , H02P21/36 , H02P29/027
Abstract: There is obtained a configuration capable of rapidly decelerating a motor even if a failure occurs in the communication between a controller and a motor control unit in a motor controller in which a speed command is input from the controller to the motor control unit. A motor controller 1 is provided with a main controller 2, and a motor control unit 3 configured to be communicable with the main controller 2 to drive a motor M according to a torque command output from the main controller 2. The motor control unit 3 includes a speed control unit 31 for outputting a torque command, so as to decelerate the motor M, if any failure occurs in communication with the main controller 2 while the motor M is being driven.
Abstract translation: 即使在从控制器向电动机控制单元输入速度指令的电动机控制器中的控制器和电动机控制单元之间的通信中发生故障，也能够使电动机快速减速。 电动机控制器1设置有主控制器2和电动机控制单元3，其被配置为可与主控制器2通信，以根据从主控制器2输出的转矩指令来驱动电动机M.电动机控制单元3包括 用于输出转矩指令的速度控制单元31，以便在马达M被驱动的同时与主控制器2通信时发生任何故障而使马达M减速。
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公开(公告)号：US09231500B2
公开(公告)日：2016-01-05
申请号：US13753617
申请日：2013-01-30
Applicant: Nidec Motor Corporation
Inventor： Darko Marcetic , Mile Bozic
Abstract: An electric motor control system includes a motor control circuit for generating a motor control signal and a braking mechanism for adjusting the motor control signal to augment motor losses when the motor control circuit is in a braking mode. The braking mechanism includes a difference component for receiving a first signal containing motor reference speed information, for receiving a second signal containing actual speed information, and for generating a third signal containing information indicating a difference between the reference speed and the actual speed. An integrating component integrates the third signal and generates a fourth signal representing the integrated third signal. The fourth signal may augment a voltage control signal in a voltage-based control circuit or may augment a flux-producing component of a current control signal in a current-based control circuit. The electric motor control circuit may include multiple braking mechanisms for use in different modes of operation.
Abstract translation: 电动机控制系统包括用于产生电动机控制信号的电动机控制电路和用于在电动机控制电路处于制动模式时调节电动机控制信号以增加电动机损耗的制动机构。 该制动机构包括用于接收包含电动机基准速度信息的第一信号的差分分量，用于接收包含实际速度信息的第二信号，以及用于产生包含表示基准速度与实际速度之差的信息的第三信号。 积分分量积分第三信号并产生表示积分第三信号的第四信号。 第四信号可以增加基于电压的控制电路中的电压控制信号，或者可以增加基于电流的控制电路中的电流控制信号的通量产生分量。 电动机控制电路可以包括用于不同操作模式的多个制动机构。
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公开(公告)号：US20140212312A1
公开(公告)日：2014-07-31
申请号：US14156764
申请日：2014-01-16
Applicant: SHIMADZU CORPORATION
Inventor： Junichiro KOZAKI , Yoshihiro NAGANO
IPC: F16C32/04 , F04D29/058
CPC classification number: F16C32/0457 , F04D19/042 , F04D19/048 , F04D29/058 , F16C2360/45 , H02K7/09 , H02P6/182 , H02P21/24 , H02P21/36
Abstract: A magnetic bearing device comprises a controller configured to obtain magnetic levitation information of the rotor shaft by AD sampling of current detection signals from the plurality of current sensors and a sum signal obtained by adding the pair of current detection signals relating to the pair of electromagnets, and perform PWM control of the excitation amplifiers based on the magnetic levitation information. The controller performs PWM control so that a length of one of an on-duty period and an off-duty period of the PWM carrier signal is always longer than a predetermined time period based on an attenuation characteristic of a spike noise produced in the electromagnetic current, and performs the AD sampling after the predetermined time period passes from starting timing of one of the on-duty period and the off-duty period.
Abstract translation: 磁轴承装置包括：控制器，被配置为通过对来自多个电流传感器的电流检测信号的AD采样获得转子轴的磁悬浮信息，以及通过将与一对电磁体相关的一对电流检测信号相加得到的和信号， 并根据磁悬浮信息进行激励放大器的PWM控制。 控制器执行PWM控制，使得基于在电磁电流中产生的尖峰噪声的衰减特性，PWM载波信号的占空比周期和关断周期之一的长度总是长于预定时间段 ，并且在从占空比时段和关闭周期中的一个的开始定时经过预定时间段之后执行AD采样。
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公开(公告)号：US20140210385A1
公开(公告)日：2014-07-31
申请号：US14137891
申请日：2013-12-20
Applicant: SHIMADZU CORPORATION
Inventor： Junichiro KOZAKI
IPC: H02P21/00
CPC classification number: F16C32/0457 , F04D19/042 , F04D19/048 , F04D29/058 , F16C2360/45 , H02P6/182 , H02P21/24 , H02P21/36
Abstract: A motor driving device comprises a first arithmetic section calculating a rotational speed and a magnetic pole electrical angle of a motor rotor, a current command setting section setting a d-axis current command and a q-axis current command in a rotating coordinate dq system based on a difference between the rotational speed and a target rotational speed, a driving command generating section generating a sinusoidal wave driving command based on the d-axis current command, the q-axis current command, the rotational speed and the magnetic pole electrical angle and a PWM signal generating section. When the rotational speed has a positive value indicating a positive rotational state, the current command setting section sets the q-axis current command of acceleration driving, and when the rotational speed has a negative value indicating a reverse rotational state, the current command setting section sets the q-axis current command of deceleration driving.
Abstract translation: 电动机驱动装置包括计算电动机转子的转速和磁极电角度的第一运算部，以旋转坐标系dq为基础的d轴电流指令和q轴电流指令的电流指令设定部 基于d轴电流指令，q轴电流指令，转速和磁极电角度，产生基于d轴电流指令，q轴电流指令，转速和磁极电角度的正弦波驱动指令的驱动指令产生部分， PWM信号生成部。 当转速具有指示正旋转状态的正值时，电流指令设定部设定加速驱动的q轴电流指令，当转速具有表示反转状态的负值时，电流指令设定部 设定减速驱动的q轴电流指令。
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