公开(公告)号：US20170182984A1

公开(公告)日：2017-06-29

申请号：US15457120

申请日：2017-03-13

Applicant: NTN CORPORATION

Inventor： Yui MASUDA

IPC: B60T8/1755 ,  F16D65/18 ,  B60T17/22 ,  B60T13/74

Abstract: Provided is an electric brake system capable of compensating for a braking force by the whole electric brake system when functional degradation occurs in a part of the system. This system includes: a diagnosis module (24) that detects functional degradation in each of electric brake devices (DB); a control calculation module (23) that estimates a controlled variable error that is a difference between an estimate of a braking force determined by a braking force estimation device (28) of an electric brake device (DB) in which functional degradation is detected, and a braking force determined by the device (28) of an electric brake device (DB) in which no functional degradation is detected; and a controlled variable compensating module (29) that, when the module (23) estimates the existence of the error, distributes a braking force corresponding to the error among the devices (DB) other than the electric brake device in which the error exists so as to add the distributed braking force to the braking force target value of each electric brake device.

公开(公告)号：US20170009834A1

公开(公告)日：2017-01-12

申请号：US15272962

申请日：2016-09-22

Applicant: NTN CORPORATION

Inventor： Yui MASUDA

IPC: F16D66/02

CPC classification number: F16D66/025 ,  B60T13/741 ,  F16D55/226 ,  F16D65/18 ,  F16D66/021 ,  F16D2121/24 ,  F16D2125/40

Abstract: Provided is an electric brake device that can prevent a pad wear from progressing beyond its limit, and can estimate the wear of the friction pad without an increase in cost and space. The electric brake device includes: an electric motor; a brake rotor; a friction pad; a linear motion mechanism; a braking force command section; a braking force estimation section; a motor rotation angle detector; and a controller. The controller is provided with a pad wear amount estimation section configured to estimate a wear amount of the friction pad at a present time by comparing a correlation between the motor rotation angle detected by the motor rotation angle detector and the braking force obtained by the braking force estimation section with a defined correlation between a motor rotation angle and a braking force when the friction pad is unworn.

Abstract translation: 提供一种可以防止垫磨损超过其极限的电动制动装置，并且可以在不增加成本和空间的情况下估计摩擦垫的磨损。 电动制动装置包括：电动马达; 制动转子; 摩擦垫 线性运动机制; 制动力指令部; 制动力估计部; 马达旋转角度检测器; 和控制器。 控制器设置有焊盘磨损量估计部件，其被配置为通过比较由电动机旋转角度检测器检测到的电动机旋转角度与通过制动力获得的制动力之间的相关性来估计摩擦垫的磨损量 估计部分，当摩擦垫未被磨损时，电动机旋转角度与制动力之间具有确定的相关性。

公开(公告)号：US20170002881A1

公开(公告)日：2017-01-05

申请号：US15265271

申请日：2016-09-14

Applicant: NTN CORPORATION

Inventor： Yui MASUDA

IPC: F16D65/18 ,  B60T13/74 ,  F16D55/226 ,  F16D66/02

CPC classification number: F16D65/18 ,  B60T13/741 ,  F16D55/226 ,  F16D66/021 ,  F16D2121/24 ,  F16D2125/40

Abstract: The electric brake device includes an electric motor, a friction pad, a linear motion mechanism, a braking force command section, a braking force estimation section, and a controller. The controller is provided with a pad wear amount estimation section to estimate a wear amount of the friction pad and a motor rotation angle detector to detect a motor rotation angle. The pad wear amount estimation section estimates a wear amount of the friction pad from the rotation angle of the electric motor, obtained by the motor rotation angle detector, which rotation angle corresponds to a distance between a retraction end at which a linear motion portion of the linear motion mechanism is separated from a brake rotor and an advance end at which the linear motion portion approaching the brake rotor generates the braking force.

Abstract translation: 电动制动装置包括电动机，摩擦垫，直线运动机构，制动力指令部，制动力估计部和控制器。 控制器设置有用于估计摩擦垫的磨损量的垫磨损量估计部和用于检测电动机旋转角度的电动机旋转角度检测器。 垫磨损量估计部分从马达旋转角度检测器获得的电动马达的旋转角度估计摩擦瓦的磨损量，该旋转角度对应于在该马达旋转角度检测器的直线运动部分 线性运动机构与制动转子和接近制动转子的直线运动部产生制动力的前端分离。

公开(公告)号：US20160091039A1

公开(公告)日：2016-03-31

申请号：US14889872

申请日：2014-05-02

Applicant: NTN CORPORATION

Inventor： Yui MASUDA

IPC: F16D65/18 ,  F16D55/225 ,  H02P7/285

CPC classification number: F16D65/18 ,  B60T13/741 ,  F16D55/225 ,  F16D2121/24 ,  F16D2125/40 ,  F16D2125/48 ,  F16D2125/50 ,  F16H25/2021 ,  H02P7/285

Abstract: An electric linear motion actuator whose power consumption is low is provided. The electric linear motion actuator includes an electric motor, a motion conversion mechanism for converting the torque of the electric motor to the linear driving force of an outer ring member, a load sensor, and a motor control device. The motor control device is configured to control the electric current applied to the electric motor such that the torque of the electric motor increases until the pressing force detected by the load sensor exceeds a target value, and then the torque of the electric motor decreases until the pressing force detected by the load sensor reaches the target value.

Abstract translation: 提供功耗低的电动直线运动致动器。 电动直线运动致动器包括电动机，用于将电动机的转矩转换为外圈构件的线性驱动力的运动转换机构，负载传感器和电动机控制装置。 电动机控制装置被配置为控制施加到电动机的电流，使得电动机的转矩增加，直到由负载传感器检测到的按压力超过目标值，然后电动机的转矩降低直到 负载传感器检测到的按压力达到目标值。

公开(公告)号：US20150360656A1

公开(公告)日：2015-12-17

申请号：US14759423

申请日：2014-01-06

Applicant: NTN CORPORATION

Inventor： Yui MASUDA

IPC: B60T8/17 ,  B60T7/04

CPC classification number: B60T8/17 ,  B60T7/04 ,  B60T7/042 ,  B60T13/741 ,  F16D65/18 ,  F16D2121/24 ,  F16D2125/40 ,  F16D2125/48 ,  F16D2125/50

Abstract: An electric brake system is provided which includes an electric brake having a friction pad which is pressed against a brake disk by an electric motor, and a controller. The controller is configured to receive detection outputs from a load detector for detecting a load applied to the brake disk (7), the brake pedal, and a vehicle speed detector, and to control the electric motor based on the outputs received. In particular, when the vehicle speed detector detects that the vehicle is at a stop, the controller compares the outputs of the brake pedal and of the load detector, and if the difference therebetween, if any, is within the width of a dead band, the controller does not change, and thus maintains, the braking load even if the brake pedal is operated.

Abstract translation: 提供了一种电动制动系统，其包括具有摩擦垫的电动制动器，所述摩擦垫通过电动机压靠在制动盘上，以及控制器。 控制器被配置为接收来自负载检测器的检测输出，用于检测施加到制动盘（7），制动踏板和车速检测器的负载，并且基于接收到的输出来控制电动机。 特别地，当车速检测器检测到车辆处于停止状态时，控制器比较制动踏板和负载检测器的输出，并且如果它们之间的差值在死区宽度内， 即使制动踏板被操作，控制器也不改变并因此维持制动负载。

公开(公告)号：US20150355038A1

公开(公告)日：2015-12-10

申请号：US14759237

申请日：2014-01-07

Applicant: NTN CORPORATION

Inventor： Yui MASUDA

IPC: G01L1/12 ,  F16D55/225 ,  G01L5/28 ,  F16D66/00

CPC classification number: G01L1/122 ,  F16D55/225 ,  F16D65/12 ,  F16D66/00 ,  F16D2066/005 ,  G01D5/12 ,  G01L5/225 ,  G01L5/28

Abstract: A magnetic load sensor is provided which is high in axial rigidity. The load sensor includes a pair of parallel plate coupled together by coupling pieces. The coupling pieces are inclined relative to the axial direction such that when an axial load is applied to the parallel plates, the parallel plates are displaced relative to each other in a direction perpendicular to the axial direction, due to deflection of the coupling pieces. A magnetic target is mounted to the parallel plate, and a magnetic sensor element is mounted to the parallel plate such that when the parallel plates are displaced relative to each other in the direction perpendicular to the axial direction, the magnetic target and the magnetic sensor element are displaced relative to each other in the direction perpendicular to the axial direction.

Abstract translation: 提供具有高轴向刚度的磁性负载传感器。 负载传感器包括通过联接件联接在一起的一对平行板。 联接件相对于轴向方向倾斜，使得当对平行板施加轴向载荷时，由于联接件的偏转，平行板在垂直于轴向的方向上相对于彼此移位。 磁性靶被安装到平行板上，并且磁性传感器元件安装到平行板上，使得当平行板在垂直于轴向的方向上相对于彼此移位时，磁性靶和磁性传感器元件 在垂直于轴向的方向上相对于彼此移位。

公开(公告)号：US20200039485A1

公开(公告)日：2020-02-06

申请号：US16499146

申请日：2018-03-29

Applicant: NISSIN KOGYO CO., LTD. ,  VEONEER NISSIN BRAKE SYSTEMS JAPAN CO., LTD. ,  MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA ,  NTN CORPORATION

Inventor： Hiromasa SATOH ,  Toshihiro OBIKA ,  Yusuke KOGA ,  Yasushi AOKI ,  Hiromitsu TOYOTA ,  Haruo KOTERA ,  Tatsuya YAMASAKI ,  Yui MASUDA

IPC: B60T8/17 ,  B60T13/74 ,  B60T17/22

Abstract: A highly reliable vehicle brake system that includes an electric brake and achieves redundancy at low cost is provided.A vehicle brake system (1) includes a first control device (10) and a second control device (11) that respectively include a master controller (30), a first sub-controller (40), and a second sub-controller (41) that are connected to one another. Each of the master controller (30), the first sub-controller (40), and the second sub-controller (41) includes a braking force calculation unit that calculates braking force of electric brakes (16a to 16d), and a determination unit that compares braking force calculation results of the controllers to determine whether itself is normal. The determination unit includes an output block section that blocks, when the determination unit determines that any one of the controllers is not normal, an output of the controller that is determined to be not normal.

公开(公告)号：US20200017087A1

公开(公告)日：2020-01-16

申请号：US16554876

申请日：2019-08-29

Applicant: NTN CORPORATION

Inventor： Yui MASUDA

IPC: B60T8/1761 ,  B60K31/00 ,  B60T7/12 ,  B60T8/32 ,  B60T8/171

Abstract: The vehicle control device includes a speed calculation unit, a speed estimation unit, a motion feedback calculation unit, and a slip estimator. The speed calculation unit calculates a speed in a predetermined direction of a vehicle on the basis of a feature quantity. The speed estimation unit estimates a speed in the predetermined direction on the basis of a speed or acceleration detected by a motion detector. The motion feedback calculation unit performs feedback calculation in which a value obtained, through a proportional gain, from a deviation between a calculation speed calculated by the speed calculation unit and an estimation speed estimated by the speed estimation unit, is added to the feature quantity. The slip estimator compares the calculation speed with the estimation speed, and estimates that the vehicle is in a slip state in the predetermined direction, when the estimation speed exceeds the calculation speed.

公开(公告)号：US20190339139A1

公开(公告)日：2019-11-07

申请号：US16473884

申请日：2017-12-26

Applicant: NTN CORPORATION

Inventor： Tatsuya YAMASAKI ,  Yui MASUDA

IPC: G01L1/12 ,  F16D55/226 ,  G01L5/28

Abstract: A load sensor used in an electromechanical brake system is provided. The load sensor includes a flange member capable of deflecting when receiving, at a load receiving portion, a load from the axially front side; a support member capable of supporting the flange member from the axially rear side, at a support portion displaced from the load receiving portion in a radial direction orthogonal to the axial direction; a displacement detecting mechanism configured to detect the amount of relative movement between the flange and support members; and a variable detection sensitivity mechanism enabling the relative movement amount with respect to the change of the load applied to the flange member to be larger in a low load range in which the load is equal to or lower than a predetermined load value than in a high load range in which the load is higher than the predetermined load value.

公开(公告)号：US20190334399A1

公开(公告)日：2019-10-31

申请号：US16510133

申请日：2019-07-12

Applicant: NTN CORPORATION

Inventor： Yui MASUDA

IPC: H02K3/28 ,  H02K1/14 ,  H02K3/20

Abstract: Provided is an electric motor in which an imbalance in electromagnetic force is inhibited even when an abnormality has occurred in an electric power system. The motor (1) is connectable to a plurality of electric power systems (D1, D2) and includes: a stator (8) including a plurality of excitation magnetic poles (12) disposed in a circumferential direction and coils (U1, V1, W1 (U2, V2, W2)) provided on the respective poles (12), the coils including, for each of the systems (D1, D2), a set of three or more phase coils, the coils carrying respective currents of three or more phases of the corresponding system (D1, D2); and a rotor (9) rotatable relative to the stator (8). The coils (U1, V1, W1, U2, V2, W2) of the stator (8) are arranged such that coils adjacent to each other in the circumferential direction are different in phase and associated with different systems.