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公开(公告)号：US11421736B2
公开(公告)日：2022-08-23
申请号：US17257154
申请日：2019-07-03
Applicant: NSK LTD.
Inventor： Naohiro Hitomi , Daisuke Gunji , Hiroyasu Kumagai , Ricardo Rodriguez Lopez
Abstract: A rolling bearing unit includes: an inner ring member having a recess on a first side in an axial direction, the recess being recessed toward a second side in the axial direction; an outer ring member disposed on the outer periphery side of the inner ring member; a rolling body disposed between the inner ring member and the outer ring member and rotatably supporting the inner ring member with respect to the outer ring member; a transmitter capable of transmitting at least one of electric power or a signal, at least a part of the transmitter being accommodated inside the recess of the inner ring member; and a covering member that is supported by the first side of the outer ring member in the axial direction, covers the first side of the inner ring member in the axial direction, and fixes the transmitter.
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公开(公告)号：US10829155B2
公开(公告)日：2020-11-10
申请号：US16610317
申请日：2018-09-28
Applicant: NSK LTD.
Inventor： Daisuke Gunji , Hiroyasu Kumagai
Abstract: A suspension operation system includes: a suspension that includes a plurality of links supporting a wheel, at least one or more of the links having an actuator increasing or decreasing its length in an axial direction; a control device that supplies a drive signal to the actuator to control operation of the suspension; and a suspension operation terminal that operates the suspension. The suspension operation terminal includes: a detector that detects operation input information to the suspension operation terminal; and a communicator that transmits information about a target posture of the wheel, the information being based on the operation input information, to the control device as an operation command. The control device includes: a first calculator that calculates the length of the actuator on the basis of the operation command; and a drive circuit that produces the drive signal on the basis of information from the first calculator.
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公开(公告)号：US12084122B2
公开(公告)日：2024-09-10
申请号：US17419976
申请日：2019-12-13
Applicant: NSK LTD.
Inventor： Takahiro Tsubaki , Hiroyasu Kumagai
CPC classification number: B62D5/0409 , B62D5/0421 , B62D5/046 , B62D6/00
Abstract: A steering apparatus for vehicles that assists and controls a steering system includes a torsional angle control section that calculates a motor current command value to make the torsional angle follow a target torsional angle; the torsional angle control section includes a steering angle disturbance compensating section that calculates a first compensation motor current command value by performing filter processing to the detected steering angle, and the torsional angle control section performs compensation by the first compensation motor current command value in calculation of the motor current command value.
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Patent Agency Ranking
4.发明授权Multi-phase motor control apparatus and electric power steering apparatus using the same 有权多相电动机控制装置及使用其的电动助力转向装置公开(公告)号：US09362860B2
公开(公告)日：2016-06-07
申请号：US14240656
申请日：2013-10-11
Applicant: NSK LTD.
Inventor： Takayoshi Sugawara , Yousuke Imamura , Hiroyasu Kumagai
CPC classification number: H02P6/10 , B62D5/046 , B62D5/0472 , H02P6/15 , H02P6/28 , H02P21/22 , H02P23/14
Abstract: A control device for a multiple motor comprises: a drive unit constituted by a pair of upper and lower arm switching elements for driving the multiphase motor; a single current detection circuit for detecting a current value; a PWM signal generation unit for generating a plurality of first phase PWM signals within two control cycles on the basis of the current value and a carrier signal; a phase shift control unit for shifting a first PWM signal with a prescribed phase generated by the PWM signal generation unit by gradually changing the amount of phase shift within the two control cycles, and outputting the shifted first PWM signal to the drive unit; and a current detection observer for estimating a current value for the multiphase motor on the basis of the current value. The PWM signal generation unit generates a plurality of second phase PWM signals within two control cycles on the basis of the estimated current value and carrier signal. When the phase shift amount in a prescribed phase in the control cycle immediately before the present control cycle is zero and the phase shift amount in a prescribed phase in the present control cycle is not zero, the phase shift control unit gradually increases the shift amount from zero in the present control cycle and the next control cycle to thereby use the second phase PWM signals in the next control cycle.
Abstract translation: 一种用于多电动机的控制装置包括：驱动单元，由用于驱动多相电机的一对上下臂开关元件构成; 用于检测电流值的单个电流检测电路; PWM信号产生单元，用于根据当前值和载波信号在两个控制周期内产生多个第一相位PWM信号; 相移控制单元，用于通过在两个控制周期内逐渐改变相移量来移动由PWM信号产生单元产生的规定相位的第一PWM信号，并将移位的第一PWM信号输出到驱动单元; 以及电流检测观察器，用于基于当前值估计多相电动机的电流值。 PWM信号生成单元基于估计的电流值和载波信号，在两个控制周期内生成多个第二相位PWM信号。 当在当前控制周期之前的控制周期中的规定相位中的相移量为零并且在本控制周期中的规定相位中的相移量不为零时，相移控制单元逐渐增加从 在当前控制周期和下一个控制周期中为零，从而在下一个控制周期中使用第二相PWM信号。
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公开(公告)号：US11365764B2
公开(公告)日：2022-06-21
申请号：US17262911
申请日：2019-07-22
Applicant: NSK LTD.
Inventor： Daisuke Gunji , Hiroyasu Kumagai , Naohiro Hitomi , Ricardo Rodriguez Lopez
Abstract: A rolling bearing unit includes: an inner ring member having a recess on a first side in an axial direction along a rotation axis, which is recessed toward a second side in the axial direction; an outer ring member on an outer peripheral side of the inner ring member; a rolling body between the inner ring member and the outer ring member; a non-contact transmitter using electric field coupling capable of transmitting at least one of an electric power or a signal and including a stationary-side transmission part including a stationary-side electrode and a rotary-side transmission part including a rotary-side electrode facing the stationary-side electrode; and a covering member supported by the first side of the outer ring member in the axial direction, covering the first side of the inner ring member in the axial direction, and fixing the stationary-side transmission part to the first side in the axial direction.
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公开(公告)号：US09667179B2
公开(公告)日：2017-05-30
申请号：US15145858
申请日：2016-05-04
Applicant: NSK LTD.
Inventor： Takayoshi Sugawara , Yousuke Imamura , Hiroyasu Kumagai
CPC classification number: H02P6/10 , B62D5/046 , B62D5/0472 , H02P6/15 , H02P6/28 , H02P21/22 , H02P23/14
Abstract: A multi-phase motor control apparatus that reduces the occurrence of the vibrations and the noises by setting the shift amount per time more finely after realizing a reduction in processing ability of a CPU by using a one-shunt type current detection circuit and an electric power steering apparatus using the same. The apparatus includes a PWM-signal generating section that generates plural second each-phase PWM-signals within two control periods based on the current estimation value and the carrier signal, and in a case that a phase shift amount of a predetermined phase in a just before control period is zero and a phase shift amount of a predetermined phase in a present control period is not zero, the phase shift control section gradually increases the phase shift amount from zero in the present control period and a next control period, and uses the second each-phase PWM-signals in the next control period.
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公开(公告)号：US11718387B2
公开(公告)日：2023-08-08
申请号：US17606791
申请日：2021-03-17
Applicant: NSK LTD.
Inventor： Hiroyasu Kumagai , Daisuke Gunji
IPC: B64C11/44
CPC classification number: B64C11/44
Abstract: A propellant force generator is provided having the size in the axial direction of a rotational shaft of a motor reduced while making the pitch angles of rotational blades driven by the motor variable. The propellant force generator includes a propellant-force generating motor adapted to generate a propellant force for rotational blades, a pitch varying motor adapted to generate a rotational motion for changing pitch angles of the rotational blades, a rotation-linear motion converting unit adapted to convert the rotational motion generated by the pitch varying motor into a linear motion, and a linear motion-rotation converting unit adapted to convert the linear motions converted by the rotation-linear motion converting unit into rotational motions. At least a part of the linear motion-rotation converting unit is located within the propellant-force generating motor.
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公开(公告)号：US10994776B1
公开(公告)日：2021-05-04
申请号：US16638607
申请日：2019-02-19
Applicant: NSK LTD.
Inventor： Takahiro Tsubaki , Hiroyasu Kumagai
Abstract: A vehicle steering apparatus that obtains the appropriate steering torque to the steering angle without being affected by road surface state and changes of mechanical characteristics of the steering system due to aging. The steering apparatus includes a target steering torque generating section to generate a target steering torque, a converting section to convert the target steering torque into a target torsional angle, and a torsional angle control section to calculate a motor current command value so as to follow-up a torsional angle to the target torsional angle. The target steering torque generating section includes an offset correcting section to obtain the first torque signal from a characteristic depending on the set steering angle based on an offset value of the steering torque and outputs the first torque signal as a target steering torque. The steering apparatus drives and controls the motor based on the motor current command value.
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