公开(公告)号：US20210016603A1

公开(公告)日：2021-01-21

申请号：US16978849

申请日：2019-03-25

Applicant: NSK LTD.

Inventor： Mayuko MORI ,  Kei KONDO ,  Yasunori OOISHI ,  Satoshi OZAKI

IPC: B60B33/00 ,  B62B5/04 ,  B62B5/00

Abstract: To be self-propelled in a simple configuration and to perform manual operation smoothly and briskly. A driving wheel includes: a base portion; a rotating shaft (first shaft) rotatably provided with respect to the base portion; a rotation member rotatably provided around the rotating shaft; a drive shaft (second shaft) provided on the rotation member orthogonally to the rotating shaft; a drive wheel provided on the rotation member and rotatable around the drive shaft; a drive unit provided on the rotation member and configured to rotationally drive the drive wheel; and a lock mechanism configured to permit rotation of the rotation member with respect to the base portion, and meanwhile, to deter the rotation of the rotation member with respect to the base portion.

公开(公告)号：US20160194027A1

公开(公告)日：2016-07-07

申请号：US14894103

申请日：2015-08-07

Applicant: NSK LTD.

Inventor： Kei KONDO ,  Toshiaki OGUCHI ,  Yusuke IMAI ,  Tomoki WATANABE

IPC: B62D15/02 ,  G01D5/34 ,  G01D5/20 ,  B62D5/04

CPC classification number: B62D15/021 ,  B62D5/04 ,  G01D5/20 ,  G01D5/2013 ,  G01D5/24476 ,  G01D5/345 ,  G01L3/08 ,  G01L5/221 ,  G01L25/003

Abstract: There are provided an angle detection apparatus configured to correct an error included in angle information output from a multipolar angle detector, a motor having the angle detection apparatus, a torque sensor, an electric power steering apparatus, and a vehicle. A multiplication circuit (12) generates digital electrical angle information (θed) from analog angle information output from a multipolar optical encoder (11), a first differentiator 30 differentiates the electrical angle information (θed) to operate an electrical angular velocity (ωed), a first discontinuity correction circuit (31) carries out processing of correcting a discontinuity of an angular velocity in a temporal change for the electrical angular velocity (ωed), and a digital filter (32) carries out correction processing of reducing a high-frequency noise component for an electrical angular velocity (ωedc) corrected by the first discontinuity correction circuit (31).

Abstract translation: 提供了一种角度检测装置，其被配置为校正由多极角度检测器输出的角度信息中包含的误差，具有角度检测装置的电动机，扭矩传感器，电动助力转向装置和车辆。 乘法电路（12）从多极光学编码器（11）输出的模拟角度信息产生数字电角度信息（第一微分器），第一微分器30区分电角度信息（＆amp; E）以操作电角速度 （ωed）时，第一不连续校正电路（31）进行电角度速度（ωed）的时间变化中的角速度的不连续性的处理，数字滤波器（32）进行减少 由第一不连续校正电路（31）校正的电角速度（ωedc）的高频噪声分量。

公开(公告)号：US20170074679A1

公开(公告)日：2017-03-16

申请号：US15341251

申请日：2016-11-02

Applicant: NSK LTD.

Inventor： Kei KONDO

IPC: G01D3/08 ,  G01D18/00 ,  H02P29/024 ,  G01D5/20

CPC classification number: G01D3/08 ,  G01D3/028 ,  G01D5/20 ,  G01D5/2073 ,  G01D18/00 ,  H02P29/024 ,  H02P29/0241

Abstract: There are provided a method for detecting an abnormality of a resolver, an angle detection device, a motor, and a transportation device, by which the abnormality can be detected promptly without the necessity of any complicated operations. There is provided a circuit configured to switch between a sine wave and a direct current voltage to be supplied, as an excitation signal of a resolver (2). Then, immediately after the power is turned on, the direct current voltage is applied to the resolver (2), and the output voltages of the phases of the resolver (2) are measured when the direct current voltage is applied. In this situation, the output voltages of the phases are compared with each other. When none of them matches each other, it is determined that an abnormality (short-circuit abnormality, short-circuiting) occurs at the resolver (2).

Abstract translation: 提供了一种用于检测旋转变压器，角度检测装置，电动机和运输装置的异常的方法，通过该方法可以迅速地检测异常，而不需要任何复杂的操作。 提供了被配置为在正弦波和要提供的直流电压之间切换的电路作为旋转变压器（2）的激励信号。 然后，在电源接通之后，直流电压被施加到旋转变压器（2），并且当施加直流电压时测量旋转变压器（2）的相位的输出电压。 在这种情况下，将相的输出电压进行比较。 当彼此不匹配时，确定在旋转变压器（2）处发生异常（短路异常，短路）。

公开(公告)号：US20160061631A1

公开(公告)日：2016-03-03

申请号：US14888462

申请日：2013-12-19

Applicant: NSK LTD.

Inventor： Kei KONDO

IPC: G01D5/20 ,  G01D18/00

CPC classification number: G01D3/08 ,  G01D3/028 ,  G01D5/20 ,  G01D5/2073 ,  G01D18/00 ,  H02P29/024 ,  H02P29/0241

Abstract: There are provided a method for detecting an abnormality of a resolver, an angle detection device, a motor, and a transportation device, by which the abnormality can be detected promptly without the necessity of any complicated operations. There is provided a circuit configured to switch between a sine wave and a direct current voltage to be supplied, as an excitation signal of a resolver (2). Then, immediately after the power is turned on, the direct current voltage is applied to the resolver (2), and the output voltages of the phases of the resolver (2) are measured when the direct current voltage is applied. In this situation, the output voltages of the phases are compared with each other. When none of them matches each other, it is determined that an abnormality (short-circuit abnormality, short-circuiting) occurs at the resolver (2).

Abstract translation: 提供了一种用于检测旋转变压器，角度检测装置，电动机和运输装置的异常的方法，通过该方法可以迅速地检测异常，而不需要任何复杂的操作。 提供了被配置为在正弦波和要提供的直流电压之间切换的电路作为旋转变压器（2）的激励信号。 然后，在电源接通之后，直流电压施加到旋转变压器（2），并且当施加直流电压时测量旋转变压器（2）的相位的输出电压。 在这种情况下，将相的输出电压进行比较。 当彼此不匹配时，确定在旋转变压器（2）处发生异常（短路异常，短路）。

公开(公告)号：US20210255628A1

公开(公告)日：2021-08-19

申请号：US16634709

申请日：2019-04-26

Applicant: NSK Ltd.

Inventor： Mayuko MORI ,  Kei KONDO ,  Masaaki TANOUE ,  Satoshi OZAKI

IPC: G05D1/02

Abstract: Provided are an autonomous running device, a running control method for the autonomous running device, and a running control program of the autonomous running device that allow the autonomous running device to reach a destination while continuing estimation of its self-position. An autonomous running device includes a first position estimation unit that estimates the position of the autonomous running device on the basis of information about surroundings of the autonomous running device, produces information about the estimated position of the autonomous running device as first positional information, and updates the first positional information, a second position estimation unit that estimates the position of the autonomous running device on the basis of rotation amounts of wheels, produces information about the estimated position of the autonomous running device as second positional information, and updates the second positional information, and a control unit.