公开(公告)号：US11964713B2

公开(公告)日：2024-04-23

申请号：US17595568

申请日：2020-05-25

Applicant: NSK Ltd.

Inventor： Kenji Mori ,  Sakiya Watanabe

IPC: B62D6/00 ,  B62D6/02

CPC classification number: B62D6/002 ,  B62D6/008 ,  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：US09889880B2

公开(公告)日：2018-02-13

申请号：US15109858

申请日：2015-03-10

Applicant: NSK Ltd.

Inventor： Kenji Mori

IPC: B62D5/04 ,  H02P27/06 ,  H02P25/22 ,  B60L3/00 ,  B60L3/12 ,  H02H3/04 ,  H02H7/08 ,  H02H7/122 ,  H02P29/032 ,  H02P6/12 ,  H02P6/08 ,  H02P29/024

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.

公开(公告)号：US20160134212A1

公开(公告)日：2016-05-12

申请号：US14899051

申请日：2013-12-13

Applicant: NSK LTD.

Inventor： Yusuke Kikuchi ,  Atsushi Horikoshi ,  Satoshi Ozaki ,  Yoshihiro Aosaki ,  Takeshi Senba ,  Hisayoshi Koiwai ,  Shigeo Shinohara ,  Kenji Mori ,  Masahiro Okutani ,  Takaaki Sekine

IPC: H02P6/12 ,  H02P6/14

CPC classification number: H02P6/12 ,  B62D5/0484 ,  B62D5/0487 ,  H02H7/0844 ,  H02H7/1225 ,  H02M7/53871 ,  H02M2001/325 ,  H02P6/085 ,  H02P6/14 ,  H02P21/22 ,  H02P27/06 ,  H02P29/032

Abstract: A motor control apparatus includes a motor current shutoff unit inserted between a multi-phase inverter circuit and a multi-phase electric motor to shut off a current for each of plural phases, the inverter circuit including an arm for each of the plural phases, a redundant arm unit including one or more arms, a connection selecting unit selecting which one of windings of the electric motor is to be connected to each of the one or more arms of the redundant arm unit, an abnormal arm detection unit detecting an abnormality in each of the plural phases of the inverter circuit, and an abnormality control unit shutting off connection between an abnormal arm and the motor when the abnormal arm detection unit detects the abnormal arm, and connecting the one or more arms of the redundant arm unit to a winding of the motor shut off.

Abstract translation: 电动机控制装置包括插入在多相逆变器电路和多相电动机之间的电动机电流切断装置，以切断多相的电流，所述逆变器电路包括用于各相的臂，a 包括一个或多个臂的冗余臂单元，连接选择单元，其选择要连接到所述冗余臂单元的所述一个或多个臂中的每一个的所述电动机的绕组中的哪一个;检测每个所述异常的异常臂检测单元 以及异常控制单元，当异常臂检测单元检测到异常臂时，断开异常臂与电机之间的连接，并将冗余臂单元的一个或多个臂连接到绕组 的电机关闭。

公开(公告)号：US08831832B2

公开(公告)日：2014-09-09

申请号：US14234176

申请日：2013-03-28

Applicant: NSK Ltd.

Inventor： Yuzuru Hoshi ,  Toru Sakaguchi ,  Sachio Nakayama ,  Masahiro Maeda ,  Kenji Mori ,  Yousuke Imamura

IPC: A01B69/00 ,  H02P21/00 ,  B62D5/04 ,  H02P6/08 ,  B60T8/1755 ,  B62D6/00 ,  B62D7/15

CPC classification number: H02P21/0035 ,  B60T8/1755 ,  B62D5/046 ,  B62D5/0463 ,  B62D5/0484 ,  B62D5/049 ,  B62D6/003 ,  B62D6/008 ,  B62D7/159 ,  H02M7/5395 ,  H02M2001/0009 ,  H02P6/08 ,  H02P29/0241

Abstract: A motor control apparatus that is capable of making the whole control system robust not only with respect to motor parameter variations such as the temperature variation and the manufacturing unevenness but also with respect to disturbances while using a cheap and compact one-shunt type current detecting circuit and simultaneously diagnosing an estimation error and an electric power steering apparatus provide with the motor control apparatus.

Abstract translation: 一种电动机控制装置，其能够使整个控制系统不仅在诸如温度变化和制造不均匀性之间的电动机参数变化方面稳固，而且在使用便宜且紧凑的单分流型电流检测电路 同时诊断估计误差和电动助力转向装置提供电动机控制装置。

公开(公告)号：US20140156144A1

公开(公告)日：2014-06-05

申请号：US14234176

申请日：2013-03-28

Applicant: NSK LTD.

Inventor： Yuzuru Hoshi ,  Toru Sakaguchi ,  Sachio Nakayama ,  Masahiro Maeda ,  Kenji Mori ,  Yousuke Imamura

IPC: H02P21/00 ,  B62D5/04 ,  H02P6/08

CPC classification number: H02P21/0035 ,  B60T8/1755 ,  B62D5/046 ,  B62D5/0463 ,  B62D5/0484 ,  B62D5/049 ,  B62D6/003 ,  B62D6/008 ,  B62D7/159 ,  H02M7/5395 ,  H02M2001/0009 ,  H02P6/08 ,  H02P29/0241

Abstract: A motor control apparatus that is capable of making the whole control system robust not only with respect to motor parameter variations such as the temperature variation and the manufacturing unevenness but also with respect to disturbances while using a cheap and compact one-shunt type current detecting circuit and simultaneously diagnosing an estimation error and an electric power steering apparatus provide with the motor control apparatus.

Abstract translation: 一种电动机控制装置，其能够使整个控制系统不仅在诸如温度变化和制造不均匀性之间的电动机参数变化方面稳固，而且在使用便宜且紧凑的单分流型电流检测电路 同时诊断估计误差和电动助力转向装置提供电动机控制装置。

公开(公告)号：US11975771B2

公开(公告)日：2024-05-07

申请号：US17642754

申请日：2020-10-08

Applicant: NSK Ltd.

Inventor： Sakiya Watanabe ,  Kenji Mori

IPC: B62D5/04 ,  B62D15/00 ,  B62D15/02

CPC classification number: B62D5/046 ,  B62D5/0466 ,  B62D5/049 ,  B62D5/0493 ,  B62D15/022 ,  B62D15/0225

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：US10093352B2

公开(公告)日：2018-10-09

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 ,  H02P29/032 ,  H02P27/06 ,  G01R31/34 ,  G05B9/02 ,  H02P5/74

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.

公开(公告)号：US09634587B2

公开(公告)日：2017-04-25

申请号：US14899051

申请日：2013-12-13

Applicant: NSK LTD.

Inventor： Yusuke Kikuchi ,  Atsushi Horikoshi ,  Satoshi Ozaki ,  Yoshihiro Aosaki ,  Takeshi Senba ,  Hisayoshi Koiwai ,  Shigeo Shinohara ,  Kenji Mori ,  Masahiro Okutani ,  Takaaki Sekine

IPC: H02P6/12 ,  B62D5/04 ,  H02P27/06 ,  H02M7/5387 ,  H02H7/122 ,  H02P6/08 ,  H02P6/14 ,  H02P21/22 ,  H02M1/32 ,  H02H7/08

CPC classification number: H02P6/12 ,  B62D5/0484 ,  B62D5/0487 ,  H02H7/0844 ,  H02H7/1225 ,  H02M7/53871 ,  H02M2001/325 ,  H02P6/085 ,  H02P6/14 ,  H02P21/22 ,  H02P27/06 ,  H02P29/032

Abstract: A motor control apparatus includes a motor current shutoff unit inserted between a multi-phase inverter circuit and a multi-phase electric motor to shut off a current for each of plural phases, the inverter circuit including an arm for each of the plural phases, a redundant arm unit including one or more arms, a connection selecting unit selecting which one of windings of the electric motor is to be connected to each of the one or more arms of the redundant arm unit, an abnormal arm detection unit detecting an abnormality in each of the plural phases of the inverter circuit, and an abnormality control unit shutting off connection between an abnormal arm and the motor when the abnormal arm detection unit detects the abnormal arm, and connecting the one or more arms of the redundant arm unit to a winding of the motor shut off.

公开(公告)号：US10056854B2

公开(公告)日：2018-08-21

申请号：US15307417

申请日：2015-07-13

Applicant: NSK LTD.

Inventor： Kenji Mori ,  Kouichi Nampei ,  Yoshihiro Aosaki

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

CPC classification number: H02P6/17 ,  B62D5/046 ,  B62D5/0484 ,  B62D5/0487 ,  H02P21/22 ,  H02P25/22 ,  H02P27/08 ,  H02P29/0241

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：US09771099B2

公开(公告)日：2017-09-26

申请号：US15115001

申请日：2015-02-26

Applicant: NSK Ltd.

Inventor： Kenji Mori ,  Takeshi Senba ,  Shigeo Shinohara

IPC: H02H5/00 ,  B62D5/04 ,  H02P29/032 ,  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.