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公开(公告)号：US20190140508A1
公开(公告)日：2019-05-09
申请号：US16241640
申请日：2019-01-07
Applicant: NTN CORPORATION
Inventor： Yui MASUDA
Abstract: Provided is an electric linear actuator that enables reduction of the mounting space and reduction of costs. An electric motor of this electric linear actuator is an axial gap motor including a stator and a rotor which are disposed such that orientations of magnetic poles which generate interlinkage flux which contributes to torque generation are parallel to the rotation axis of the electric motor. Further, a linear motion mechanism and the electric motor are disposed in line along the same axis which serves as the axis of a rotation input and output shaft of the linear motion mechanism. First and second coil terminals have extended portions extended in the outer-diameter side in the radial direction with respect to the rotation axis, and the extended portions are electrically connected to a control device through a wiring mechanism.
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公开(公告)号：US20180015909A1
公开(公告)日：2018-01-18
申请号：US15711534
申请日：2017-09-21
Applicant: NTN CORPORATION
Inventor： Yui MASUDA
IPC: B60T8/172 , B60T8/1761 , B60T8/173
CPC classification number: B60T8/172 , B60T8/173 , B60T8/1761 , B60T8/17616
Abstract: The anti-lock brake control device includes: a wheel motion estimator to estimate one or more of an angle, an angular velocity, and an angular acceleration of a wheel; a slip estimator to estimate a slip state of the wheel, using an estimation result of the wheel motion estimator; and an anti-lock controller to give a command for causing a brake device to reduce a braking force, in accordance with the estimated slip state of the wheel. The slip estimator includes delay compensators, such as one or a plurality of filters, which perform delay compensation for the estimation result of the wheel motion estimator. The anti-lock controller gives the command for reducing the braking force, on the basis of a result of predetermined determination including comparison of the plurality of estimation results outputted from the slip estimator.
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公开(公告)号：US20170009830A1
公开(公告)日：2017-01-12
申请号：US15274614
申请日：2016-09-23
Applicant: NTN CORPORATION
Inventor： Yui MASUDA
CPC classification number: F16D65/18 , B60T13/741 , F16D55/226 , F16D2066/003 , F16D2066/005 , F16D2066/006 , F16D2121/24 , F16D2125/50 , H02P15/00
Abstract: Provided is an electric brake device that can achieve improved control accuracy without involving a cost increase. The electric brake device includes an electric motor, a brake rotor, a friction pad, a transmission mechanism, a braking force command section, a braking force estimation section, a motor rotation angle detector, and a controller. The motor rotation angle detector, which is used in a partial region of a braking force from a minimum braking force to a maximum braking force, has a higher resolution than a motor rotation angle that causes a braking force fluctuation equivalent to a minimum braking force resolution of the braking force estimation section. The controller includes a resolution interpolation section configured to interpolate, by using a motor rotation angle detected by the motor rotation angle detector, a minimum resolution of the braking force obtained by the braking force estimation section.
Abstract translation: 提供一种电动制动装置，其可以在不涉及成本增加的情况下实现提高的控制精度。 电动制动装置包括电动机，制动转子，摩擦垫，变速机构，制动力指令部，制动力估计部，电动机旋转角度检测器和控制器。 在从最小制动力到最大制动力的制动力的局部区域中使用的电动机旋转角度检测器具有比引起相当于最小制动力分辨率的制动力波动的电动机旋转角度更高的分辨率 的制动力估计部。 控制器包括：分辨率插值部，被配置为通过使用由电动机旋转角度检测器检测的电动机旋转角度来内插由制动力估计部获得的制动力的最小分辨率。
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公开(公告)号：US20160178021A1
公开(公告)日：2016-06-23
申请号：US15057389
申请日：2016-03-01
Applicant: NTN CORPORATION
Inventor： Yui MASUDA
CPC classification number: F16D65/18 , B60L7/00 , F16D2121/24 , F16D2125/40 , F16D2125/48 , F16D2125/52 , H02K7/06 , H02P3/18 , H02P6/08 , H02P23/009 , Y02T10/641 , Y02T10/642
Abstract: Provided is an electric brake device that can suppress increase in power consumption and that can improve responsiveness. This electric brake device includes: a brake rotor; a brake pad; an electric motor (2); a linear motion mechanism configured to convert a rotary motion of the electric motor (2) into a linear motion so as to be transmitted to the brake pad; a controller (9) to control the electric motor (2); and a brake command (40) device to send a braking force command to the controller (9). The controller (9) includes: an emergency braking detector (41) to detect an emergency braking request; a steady state controller (46) to perform braking in a steady state; and a flux weakening controller (42) to perform flux weakening control. The flux weakening control is performed when the emergency braking detector (41) detects an emergency braking request.
Abstract translation: 提供一种能够抑制功耗增加并能够提高响应性的电动制动装置。 该电动制动装置包括：制动转子; 刹车片 电动机（2）; 线性运动机构，被配置为将电动机（2）的旋转运动转换为直线运动，以便传递到制动衬块; 控制器（9），用于控制电动机（2）; 以及向所述控制器（9）发送制动力指令的制动指令（40）装置。 控制器（9）包括：紧急制动检测器（41），用于检测紧急制动请求; 稳态控制器（46），用于在稳定状态下进行制动; 和弱磁控制器（42），以实现磁通弱化控制。 当紧急制动检测器（41）检测到紧急制动请求时，执行磁通弱化控制。
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公开(公告)号：US20220001847A1
公开(公告)日：2022-01-06
申请号：US17480627
申请日：2021-09-21
Applicant: NTN CORPORATION
Inventor： Yui MASUDA
Abstract: The electric-powered actuator includes a control device including: a motor angle estimation unit, and a reverse-input holding control section having a function of engaging an engaging part with an engaged part by controlling a solenoid to set the reverse-input holding mechanism into a reverse-input holding state while the electric-powered actuator is applying a load and a function of, from the reverse-input holding state, disengaging the engaging part from the engaged part to set the reverse-input holding mechanism into a reverse-input holding release state. The reverse-input holding control section includes an engagement intermediate control function section configured to control the estimated rotation angle such that the engaged part and the engaging part come into a predetermined positional relation within a certain period of time, when the engaging part is brought into engagement with the engaged part and when the engaging part is brought out of engagement with the engaged part.
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Patent Agency Ranking
公开(公告)号：US20200039484A1
公开(公告)日：2020-02-06
申请号：US16499063
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 , Hiromitsu TOYOTA , Haruo KOTERA , Tatsuya YAMASAKI , Yui MASUDA
Abstract: A highly reliable vehicle brake system including an electric brake is provided.A vehicle brake system (1) includes electric brakes (16a to 16d) provided with motors (80 to 85), drivers (60 to 65) that drive the motors (80 to 85), and a control device that controls the drivers (60 to 65). The electric brake (16a) includes two motors (80 and 81), and the control device includes separate drivers (60 and 61) respectively corresponding to the two motors (80 and 81). The control device includes a first master controller (30) and a first sub-controller (40). The first master controller (30) controls the driver (61) corresponding to the motor (81), and the first sub-controller (40) controls the driver (60) corresponding to the motor 80.
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公开(公告)号：US20190338817A1
公开(公告)日：2019-11-07
申请号：US16517065
申请日：2019-07-19
Applicant: NTN CORPORATION
Inventor： Yui MASUDA
Abstract: Provided is an electric linear motion actuator that enables size reduction and cost reduction while increasing the instantaneous output of an electric motor. A control device (2) of the electric linear motion actuator includes: a motor driver (24) configured to control power supplied to a coil (4b) of an electric motor (4); a power storage unit (21) connected to a power supply device (3) and the motor driver (24); a current flow direction restriction unit (20) disposed between the power supply device (3) and the power storage unit (21), which causes current to pass only in a direction in which power is supplied from the power supply device (3); and a step-up unit (19) configured to step up voltage of the power supply device (3) and provide the stepped-up voltage to the power storage unit (21).
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公开(公告)号：US20190217841A1
公开(公告)日：2019-07-18
申请号：US16365204
申请日：2019-03-26
Applicant: NTN CORPORATION
Inventor： Yui MASUDA
IPC: B60T13/74 , B60T17/20 , B60T1/06 , B60T8/171 , B60T8/172 , B60T8/32 , H02P21/18 , H02P21/22 , H02P21/36
CPC classification number: B60T13/741 , B60T1/065 , B60T8/00 , B60T8/171 , B60T8/172 , B60T8/321 , B60T13/74 , B60T13/746 , B60T17/20 , B60T2250/04 , H02P21/18 , H02P21/22 , H02P21/36 , H02P29/00
Abstract: This electric brake device includes: a brake rotor, a friction member, a friction member operator, an electric motor, and a controller which controls, by controlling the electric motor, a braking force generated as a result of contact between the friction member and the brake rotor. The electric brake device includes a vehicle speed estimator which estimates the speed of the vehicle having the electric brake device mounted thereon. The controller includes a power limiter which limits the power that drives the electric motor. When an estimated vehicle speed, which is the speed of the vehicle estimated by the vehicle speed estimator, is in a determined low-speed range, the power limiter limits the power in accordance with a condition that has been determined such that the maximum power consumption of the electric brake device decreases in accordance with decrease in the estimated vehicle speed.
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公开(公告)号：US20180154872A1
公开(公告)日：2018-06-07
申请号：US15888574
申请日：2018-02-05
Applicant: NTN CORPORATION
Inventor： Yui MASUDA
CPC classification number: B60T8/172 , B60T13/74 , B60T13/741 , F16D65/18 , F16D66/00 , F16D2121/24 , F16D2125/34
Abstract: An electric brake device includes an electric brake actuator and a control device. The controller includes: a brake control calculator that control a braking force so as to follow up a target braking force provided from a host ECU; a brake maintaining current estimator that maintains a motor current at a constant value; and a switching controller that performs switching between the brake control calculator and the brake maintaining current estimator. When a condition that an absolute value of a rate of change of the target braking force is equal to or less than a predetermined value and the braking force is in the follow-up state is satisfied, the switching controller performs switching from the brake control calculator to the brake maintaining current estimator that maintains the motor current at a constant value.
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公开(公告)号：US20180073585A1
公开(公告)日：2018-03-15
申请号：US15814093
申请日：2017-11-15
Applicant: NTN CORPORATION
Inventor： Yui MASUDA
Abstract: A parking brake mechanism achieves a parking brake function using a friction material operation mechanism driven by a main brake motor. The parking brake mechanism includes a parking brake motor provided coaxially with one of rotational shafts transmitting a torque from the main brake motor to the friction material operation mechanism. A linear motion mechanism moves a rotor of the motor and an engaging mechanism. The engaging mechanism includes a rotor-side engaging portion and a housing-side engaging portion engaging with each other when the rotor is moved linearly to a predetermined position by the linear motion mechanism. Engagement of the engaging mechanism achieves a pressing force holding function of holding an angle of the rotational shaft against a reaction force of the pressing force of a friction material.
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