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1.发明授权公开(公告)号：US09164010B2
公开(公告)日：2015-10-20
申请号：US14007831
申请日：2013-04-01
Applicant: NSK Ltd.
Inventor： Masaki Kuwahara , Yasuhiro Kawai , Toshiyuki Onizuka
CPC classification number: G01L25/003 , B62D5/0463 , B62D5/049 , B62D6/10 , G01L3/00 , G01L3/105
Abstract: There are provided a torque detection apparatus with high reliability and an electric power steering system and a vehicle which use the torque detection apparatus. The torque detection apparatus (30) detects the torque based upon a difference in the terminal voltage of the pair of detection coils. In this situation, the torque detection apparatus (30) outputs two analog torque signals (analog main torque signal Tma and analog sub torque signal Tsa) to the ECU (15), and outputs to the ECU (15) a digital communication signal S in which digital torque values obtained by converting the two analog torque signals to a digital format (main torque value Tm and sub torque value Ts) and diagnosis information Diag of the torque sensor circuit are superimposed.
Abstract translation: 提供了具有高可靠性的扭矩检测装置和使用扭矩检测装置的电动助力转向系统和车辆。 转矩检测装置（30）基于一对检测线圈的端子电压的差异检测转矩。 在这种情况下，转矩检测装置（30）将两个模拟转矩信号（模拟主转矩信号Tma和模拟副转矩信号Tsa）输出到ECU（15），并向ECU（15）输出数字通信信号S 通过将两个模拟转矩信号转换为数字格式（主转矩值Tm和次转矩值Ts）而获得的数字转矩值和扭矩传感器电路的诊断信息Diag被叠加。
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公开(公告)号：US11192578B2
公开(公告)日：2021-12-07
申请号：US16666602
申请日：2019-10-29
Applicant: NSK Ltd.
Inventor： Masaki Kuwahara , Shigeyuki Uematsu
IPC: B62D6/00 , B62D5/04 , G01D5/244 , G01B7/30 , B60R16/033 , B62D15/02 , G01D5/14 , G07C5/08 , H02P6/16
Abstract: To provide a motor drive control device, an electric power steering device, and a vehicle which can individually diagnose abnormalities of magnetic detection elements, designed in a multisystem configuration to include at least two systems, for each system. A motor drive control device includes two systems of first and second rotation information detection function units. The first and second rotation information detection function units include first and second rotation position information detection units and first and second rotation information detection units. The first and second rotation information detection units individually diagnose their own abnormalities based on first and second motor rotation position signals detected by the first and second rotation position information detection units.
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公开(公告)号：US09716421B2
公开(公告)日：2017-07-25
申请号：US15105129
申请日：2015-01-14
Applicant: NSK LTD.
Inventor： Kazuhiro Ohira , Masaki Kuwahara
IPC: G01D5/20 , H02K11/225 , H02K24/00 , H02K37/04
CPC classification number: H02K11/225 , G01D5/2046 , H02K24/00 , H02K37/04
Abstract: A resolver device includes a stator core and a rotor core supported so as to be freely rotatable with respect to the stator core and configured such that a reluctance component in a gap between the rotor core and the stator core changes in accordance with a relative angle position to the stator core. The stator core includes stator main poles and stator interpoles.
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Patent Agency Ranking
公开(公告)号：US09989427B2
公开(公告)日：2018-06-05
申请号：US15032402
申请日：2014-11-04
Applicant: NSK LTD.
Inventor： Seiichi Teshigawara , Kazuteru Tobita , Masaki Kuwahara
CPC classification number: G01L1/005 , G01D5/12 , G01D5/30 , G01L1/2206 , G01L5/166
Abstract: A force sensor includes: a base; a first movable portion arranged to face the base; a second movable portion arranged to face the first movable portion; a support that is provided on the base and rockably supports the first movable portion and the second movable portion; a joint that is provided to the support and rotatably supports the second movable portion; and a first detection unit that can detect a force component causing the first movable portion and the second movable portion to rock and a second detection unit that can detect a force component causing the second movable portion to rotate, when external force is applied to at least one of the first movable portion and the second movable portion.
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5.发明申请公开(公告)号：US20150226627A1
公开(公告)日：2015-08-13
申请号：US14007831
申请日：2013-04-01
Applicant: NSK Ltd.
Inventor： Masaki Kuwahara , Yasuhiro Kawai , Toshiyuki Onizuka
CPC classification number: G01L25/003 , B62D5/0463 , B62D5/049 , B62D6/10 , G01L3/00 , G01L3/105
Abstract: There are provided a torque detection apparatus with high reliability and an electric power steering system and a vehicle which use the torque detection apparatus. The torque detection apparatus (30) detects the torque based upon a difference in the terminal voltage of the pair of detection coils. In this situation, the torque detection apparatus (30) outputs two analog torque signals (analog main torque signal Tma and analog sub torque signal Tsa) to the ECU (15), and outputs to the ECU (15) a digital communication signal S in which digital torque values obtained by converting the two analog torque signals to a digital format (main torque value Tm and sub torque value Ts) and diagnosis information Diag of the torque sensor circuit are superimposed.
Abstract translation: 提供了具有高可靠性的扭矩检测装置和使用扭矩检测装置的电动助力转向系统和车辆。 转矩检测装置（30）基于一对检测线圈的端子电压的差异检测转矩。 在这种情况下，转矩检测装置（30）将两个模拟转矩信号（模拟主转矩信号Tma和模拟副转矩信号Tsa）输出到ECU（15），并向ECU（15）输出数字通信信号S 通过将两个模拟转矩信号转换为数字格式（主转矩值Tm和次转矩值Ts）而获得的数字转矩值和扭矩传感器电路的诊断信息Diag被叠加。
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公开(公告)号：US10690514B2
公开(公告)日：2020-06-23
申请号：US16605900
申请日：2018-04-11
Applicant: NSK LTD.
Inventor： Masaki Kuwahara , Kazuhiro Ohira
Abstract: A rotation angle detection device includes: a rotating body having magnetic tracks on which magnetic pole pairs are arranged at even intervals in concentric ring shapes; magnetic sensors each configured to detect a magnetic field of a corresponding one of the magnetic tracks and output a sine signal and a cosine signal; storage configured to store magnetic sensor correction information; a correction calculator configured to correct the sine signal and the cosine signal based on the magnetic sensor correction information; a phase detector configured to calculate a phase of the corrected sine signal and the corrected cosine signal; a phase difference detector configured to calculate a phase difference between a plurality of the phases; and an angle calculator configured to convert the phase difference into an absolute angle.
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公开(公告)号：US10103657B2
公开(公告)日：2018-10-16
申请号：US15570453
申请日：2017-04-26
Applicant: NSK Ltd.
Inventor： Masaki Kuwahara , Shigeyuki Uematsu
Abstract: The motor drive control apparatus includes first and second rotation information detection function units and a power control unit. When it is determined the ignition switch is changed from the ON state to the OFF state, the power control unit intermittently supplies power from a battery to the first and second rotation information detection function units at a first interval while a motor rotation number is lower than a preset rotation number set in advance. When it is determined the motor rotation number becomes equal to or higher than the preset rotation number during this intermittent supply state, the power control unit intermittently supplies the power from the battery to the first and second rotation information detection function units at a second interval shorter than the first interval while the motor rotation number is equal to or higher than the preset rotation number.
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8.发明授权公开(公告)号：US10035535B2
公开(公告)日：2018-07-31
申请号：US15578064
申请日：2016-06-24
Applicant: NSK Ltd.
Inventor： Kazuhiro Ohira , Masaki Kuwahara , Sumio Sugita , Shigeyuki Uematsu
CPC classification number: B62D5/0406 , B62D5/04 , B62D15/02 , G01B7/30 , G01D5/244 , G01D5/24461 , G01D5/2451 , G01L3/08 , G01L3/10 , G01L3/104 , G01L3/105
Abstract: There are provided a relative angle detection device suitable for expanding a torque detection range, and a torque sensor, an electric power steering device and a vehicle including the relative angle detection device. Based on a first sine signal representing sin(θos+Δθ) and a first cosine signal representing cos(θos+Δθ) in accordance with a rotation angle(θis) of a first multipolar ring magnet that synchronously rotates with an input shaft from between the coaxially arranged input shaft and an output shaft, and based on a second sine signal representing sin θos and a second cosine signal representing cos θos in accordance with a rotation angle(θos) of a second multipolar ring magnet that synchronously rotates with the output shaft, sin Δθ and cos Δθ are calculated in accordance with a relative angle(Δθ) between the input shaft and the output shaft, and from Δθ=arctan(sin Δθ/cos Δθ), the relative angle(Δθ) is calculated.
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