公开(公告)号：US20220315103A1

公开(公告)日：2022-10-06

申请号：US17595568

申请日：2020-05-25

Applicant: NSK Ltd.

Inventor： Kenji MORI ,  Sakiya WATANABE

IPC: B62D6/00 ,  B62D6/02

Abstract: A vehicle steering device capable of stabilizing behavior of a vehicle when traveling backward. The device includes a reaction force device configured to apply steering reaction force to a wheel, a drive device configured to turn tires in accordance with steering of the wheel, and a control unit configured to control the reaction force device and the drive device. The control unit includes a turning ratio map unit configured to set a turning ratio gain in accordance with the vehicle speed of a vehicle, and a target turning angle generation unit configured to generate a target turning angle by multiplying the steering angle of the wheel by the turning ratio gain. The turning ratio gain at backward traveling of the vehicle is equal to or larger than the turning ratio gain at forward traveling of the vehicle.

公开(公告)号：US20220009546A1

公开(公告)日：2022-01-13

申请号：US17294154

申请日：2019-09-04

Applicant: NSK LTD.

Inventor： Kenji MORI

IPC: B62D5/04 ,  B62D6/00

Abstract: When a vehicle speed Vs of a vehicle is a predetermined alternative vehicle speed, a target steering torque Tref is reduced in accordance with the absolute value of the difference between a physical quantity generated through turning motion of the vehicle and an estimated value of the physical quantity at an alternative vehicle speed.

公开(公告)号：US20160339949A1

公开(公告)日：2016-11-24

申请号：US15115001

申请日：2015-02-26

Applicant: NSK LTD.

Inventor： Kenji MORI ,  Takeshi SENBA ,  Shigeo SHINOHARA

IPC: B62D5/04 ,  H02P29/028

CPC classification number: B62D5/0484 ,  B62D5/0487 ,  H02P29/028 ,  H02P29/032

Abstract: A motor controller includes: a main motor drive circuit configured to control driving of a multi-phase electric motor; a backup motor drive circuit configured to control driving of the multi-phase electric motor, when an abnormality occurs at the main motor drive circuit; and an abnormality diagnosis unit configured to diagnose the abnormality of the main and backup motor drive circuits. In a normal drive state, only the main motor drive circuit is configured to drive the multi-phase electric motor, and in a backup drive state, when the abnormality diagnosis unit diagnoses that the abnormality occurs at the main motor drive circuit as a diagnoses result, a motor current of a phase output unit where the abnormality occurs is cut off, and the phase output unit that has been cut off is replaced with another phase output unit of a same phase in the backup motor drive circuit.

Abstract translation: 电动机控制器包括：主电动机驱动电路，被配置为控制多相电动机的驱动; 配置为当主电动机驱动电路发生异常时，控制多相电动机的驱动的备用电动机驱动电路; 以及异常诊断单元，被配置为诊断主电动机驱动电路和备用电动机驱动电路的异常。 在正常驱动状态下，只有主电机驱动电路被配置为驱动多相电动机，并且在备用驱动状态下，当异常诊断单元诊断在主电动机驱动电路发生异常时作为诊断结果 断开发生异常的相位输出单元的电动机电流，并且在备用电动机驱动电路中用相同相位的另一相位输出单元代替被切断的相位输出单元。

公开(公告)号：US20220332362A1

公开(公告)日：2022-10-20

申请号：US17642754

申请日：2020-10-08

Applicant: NSK Ltd.

Inventor： Sakiya WATANABE ,  Kenji MORI

IPC: B62D5/04 ,  B62D15/02

Abstract: A vehicle steering device includes a reaction force device, a drive device, a first ECU configured to control the reaction force device, a second ECU configured to control the drive device, a first rudder angle sensor and a second rudder angle sensor each configured to detect a steering angle of a wheel and output the detected steering angle to the second ECU, and a communication line that transmits at least one of steering angles of the wheel as detected values of the first rudder angle sensor and the second rudder angle sensor from the second ECU to the first ECU.

公开(公告)号：US20170117833A1

公开(公告)日：2017-04-27

申请号：US15307417

申请日：2015-07-13

Applicant: NSK LTD.

Inventor： Kenji MORI ,  Kouichi NAMPEI ,  Yoshihiro AOSAKI

IPC: H02P6/17 ,  H02P27/08 ,  B62D5/04 ,  H02P21/22

CPC classification number: H02P6/17 ,  B62D5/046 ,  B62D5/0484 ,  B62D5/0487 ,  H02P21/22 ,  H02P25/22 ,  H02P27/08 ,  H02P29/024

Abstract: A motor control unit that does not make an occurrence of a noisy sound and a vibration and does not give a steering discomfort by changing parameters of a current feedback control section even if an electric characteristic of the motor varies with a system-switching due to a failure occurrence, and to an electric power steering apparatus using the same and a vehicle. The motor control unit controls a motor having multi-system motor windings by means of a 3-phase current feedback system provided with a current control section through a motor driving circuit of each winding system, having a function that changes by switching parameters of the current control section corresponding to a driving system number of the multi-system motor windings.

公开(公告)号：US20160325777A1

公开(公告)日：2016-11-10

申请号：US15109858

申请日：2015-03-10

Applicant: NSK LTD.

Inventor： Kenji MORI

IPC: B62D5/04 ,  H02H7/08 ,  H02P6/12 ,  H02P25/22

CPC classification number: B62D5/0484 ,  B60L3/0061 ,  B60L3/12 ,  B60L2210/40 ,  B60L2220/54 ,  B60L2240/429 ,  B60L2240/529 ,  B62D5/046 ,  B62D5/0487 ,  H02H3/044 ,  H02H7/08 ,  H02H7/0833 ,  H02H7/122 ,  H02P6/085 ,  H02P6/12 ,  H02P25/22 ,  H02P27/06 ,  H02P29/0241 ,  H02P29/032 ,  Y02T10/641 ,  Y02T10/642 ,  Y02T10/7241

Abstract: The motor control device includes plural motor current blocking units that, in blocking operation, individually block energization between plural motor driving circuits and multi-phase motor windings of a multi-phase electric motor and an abnormality detecting unit that detects a short-circuit failure of the motor current blocking units. The abnormality detecting unit causes one or more motor current blocking units of the plural motor current blocking units to perform a blocking operation during energization between the plural motor driving circuits and the multi-phase electric motor, and, during the blocking operation, detects a short-circuit failure of the motor current blocking units caused to perform the blocking operation based on current values of currents flowing to the plural motor driving circuits.

Abstract translation: 电动机控制装置包括多个电动机电流阻断单元，其在隔离操作中单独地阻止多个电动机驱动电路和多相电动机的多相电动机绕组之间的通电，以及检测短路故障的异常检测单元 电机电流阻塞单位。 异常检测单元使得多个电动机电流阻挡单元中的一个或多个电动机电流阻塞单元在多个电动机驱动电路和多相电动机之间的通电期间执行阻塞操作，并且在闭锁操作期间，检测短路 电动机电流阻塞单元的电路故障基于流向多个电动机驱动电路的电流的电流值而进行阻塞操作。

公开(公告)号：US20160200355A1

公开(公告)日：2016-07-14

申请号：US14911697

申请日：2013-12-13

Applicant: NSK LTD.

Inventor： Kenji MORI ,  Kotaro TAGAMI ,  Hiroki SUGAWARA ,  Shigeo SHINOHARA ,  Takaaki SEKINE ,  Takeshi SENBA ,  Shuji ENDO

IPC: B62D5/04 ,  H02P21/22 ,  H02H7/08

CPC classification number: B62D5/0487 ,  B62D5/04 ,  B62D5/0463 ,  B62D5/0466 ,  B62D5/0484 ,  G01R31/34 ,  G01R31/343 ,  G05B9/02 ,  H02H7/0844 ,  H02P5/74 ,  H02P21/22 ,  H02P27/06 ,  H02P29/032

Abstract: A motor controller, an electric power steering device using the motor controller, and a vehicle using the motor controller are provided. The motor controller includes plural hardware sets configured to operate in a normal state and to output a motor current, a control operation device configured to control the plurality of hardware sets commonly, an electric motor configured to operate with motor current output from each of the plurality of hardware sets, and an abnormality diagnosis unit configured to diagnose an abnormality of each of the plurality of hardware sets. In the control device, when there is an abnormal hardware set that has been diagnosed by the abnormality diagnosis unit, the control operation device stops an operation of the abnormal hardware set that has been diagnosed, and continues driving of the electric motor with a normal hardware set.

Abstract translation: 提供了一种电动机控制器，使用该电动机控制器的电动助力转向装置和使用该电动机控制器的车辆。 电动机控制器包括被配置为在正常状态下操作并输出电动机电流的多个硬件组，被配置为共同地控制多个硬件组的控制操作装置，被配置为利用从多个硬件中的每一个输出的电动机电流进行动作的电动机 以及异常诊断单元，被配置为诊断多个硬件组中的每一个的异常。 在控制装置中，当由异常诊断单元诊断出异常硬件组时，控制操作装置停止已诊断的异常硬件组的操作，并以正常硬件继续驱动电动机 组。

公开(公告)号：US20230034838A1

公开(公告)日：2023-02-02

申请号：US17783771

申请日：2020-11-25

Applicant: NSK LTD.

Inventor： Kenji MORI

IPC: B62D6/00

Abstract: A first current command value of a turning motor is generated based on a target turning angle, and the turning motor is driven based on a second current command value obtained by restricting the first current command value with a current restriction value in accordance with the angular velocity of the turning motor. A first torque signal is generated based on a predetermined basic map in accordance with at least a vehicle speed and a steering angle of a vehicle, and a target steering torque is generated by adding, to the first torque signal, a second torque signal in accordance with the deviation between the first current command value and the second current command value.

公开(公告)号：US20220097760A1

公开(公告)日：2022-03-31

申请号：US17422322

申请日：2019-12-24

Applicant: NSK LTD.

Inventor： Kenji MORI

IPC: B62D6/00 ,  B62D5/04

Abstract: A vehicle steering device configured to assist and control a steering system of a vehicle by driving and controlling a motor configured to assist steering force. A target steering torque generation unit 200 configured to generate target steering torque Tref of the motor is included. The target steering torque generation unit 200 generates the target steering torque Tref in accordance with the difference value of a torque signal Tref_a0 in accordance with a steering angle and a vehicle speed from a value obtained by multiplying a physical quantity generated through tire slipping by a predetermined proportionality coefficient.