公开(公告)号：US11597436B2

公开(公告)日：2023-03-07

申请号：US17432321

申请日：2021-04-07

Applicant: NSK LTD.

Inventor： Dai Suzuki ,  Takayuki Kobayashi ,  Shin Kumagai ,  Hidetaka Nakamura

IPC: B62D15/02 ,  G06F1/3287 ,  B62D5/04 ,  B62D6/00 ,  G01B7/30 ,  G01D5/16 ,  G01L3/10 ,  G01L5/22 ,  G01D5/244

Abstract: The power management unit supplies first power that is continuous power to the second sensor when the power switch is on, supplies second power that is intermittent power having a voltage lower than the first power to the second sensor when the power switch is off, and outputs rotation number information representing a rotation number of the motor rotation shaft based on the second sensor signal. The power management unit includes a comparator that operates using the second power as the power source when the power switch is off and compare the second sensor signal and the reference voltage, and a counter that detects the rotation number of the motor rotation shaft by counting the output of the comparators.

公开(公告)号：US10093351B2

公开(公告)日：2018-10-09

申请号：US15746682

申请日：2016-08-05

Applicant: NSK LTD.

Inventor： Shin Kumagai ,  Kyosho Uryu ,  Nobuhiko Ando

IPC: B62D5/04 ,  H02M7/5387 ,  H02M1/36 ,  H02P27/08

Abstract: An electronic control unit diagnoses a short failure of an inverter FETs and diagnoses whether the failure of the FET-short detecting section has occurred. The unit controls a motor through an inverter including a bridge having an upper-stage FETs and a lower-stage FETs via an MCU, having: an FET-short detecting section to detect a short failure of the upper-stage FETs and the lower-stage FETs based on respective connection point voltages of the upper-stage FETs and the lower-stage FETs; and a diagnostic function to detect a failure of the FET-short detecting section. The diagnostic function diagnoses the failure of the FET-short detecting section at start up and turns-OFF the upper-stage FETs and the lower-stage FETs when the failure is detected. The FET-short detecting section diagnoses the short failure of the upper-stage FETs and the lower-stage FETs when the failure of the FET-short detecting section is not detected.

公开(公告)号：US20150244302A1

公开(公告)日：2015-08-27

申请号：US14429420

申请日：2012-11-06

Applicant: NSK LTD.

Inventor： Shin Kumagai

IPC: H02P27/08 ,  B62D5/04 ,  H02P6/08

CPC classification number: H02P27/08 ,  B62D5/046 ,  H02M1/08 ,  H02P6/085 ,  H03K17/063 ,  H03K2217/0063 ,  H03K2217/0081

Abstract: An object of the present invention is to provide an electric power steering apparatus capable of stably performing drive of FETs of an inverter by means of a simplified constitution and control.[Means For Solving The Problem]An electric power steering apparatus that drive-controls a motor by an inverter comprised of an FET bridge based on each-phase duty command values of PWM and performs assist control of a steering system, comprises a charge pump circuit and a bootstrap circuit that generate a booster power voltage for driving upper-FETs of the FET bridge, wherein a voltage of one having a high voltage of the charge pump circuit and the bootstrap circuit is used as the booster power voltage.

Abstract translation: 本发明的目的是提供一种能够通过简化的结构和控制来稳定地进行逆变器的FET的驱动的电动助力转向装置。 解决问题的手段一种电动助力转向装置，其通过由基于PWM的各相占空指令值的FET桥构成的逆变器来驱动电动机，并进行转向系统的辅助控制，包括电荷泵电路 以及自举电路，其产生用于驱动FET桥的上FET的升压电源电压，其中使用具有高电压的电荷泵电路和自举电路的电压作为升压电源电压。

公开(公告)号：US20150175193A1

公开(公告)日：2015-06-25

申请号：US14349522

申请日：2013-06-06

Applicant: NSK LTD.

Inventor： Shuji Endo ,  Masashi Ueno ,  Kenichi Okamoto ,  Shin Kumagai

IPC: B62D5/04

CPC classification number: B62D5/0487 ,  B62D5/0481

Abstract: There is provided an in-vehicle electronic control apparatus suitable for enhancing a robust characteristic of a failure diagnosis process performed for a functional part having a function relating to a drive-control of an actuator. A functional part (120) relating to the drive-control of an electric motor (12) includes a main functional part (120a) and an alternative functional part (120b) that is an alternative of the main functional part.

Abstract translation: 提供了一种车载电子控制装置，其适用于增强对具有与致动器的驱动控制有关的功能的功能部件执行的故障诊断处理的鲁棒特性。 与电动机（12）的驱动控制有关的功能部件（120）包括作为主要功能部件的替代品的主要功能部件（120a）和备用功能部件（120b）。

公开(公告)号：US10471984B2

公开(公告)日：2019-11-12

申请号：US15776907

申请日：2016-11-22

Applicant: NSK Ltd. ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

Inventor： Shin Kumagai ,  Nobuhiko Ando ,  Kyosho Uryu ,  Takahiro Yamazaki

IPC: B62D5/04 ,  H02P27/06 ,  H02M7/48 ,  B62D6/00 ,  G06F11/30 ,  H02M1/32 ,  H02M7/5387 ,  H02P29/024

Abstract: An electronic control unit where an external watch dog timer (WDT) can always normally detect an abnormality (a failure) to a micro controller unit (MCU) related to a built-in self-test (BIST) function and which can maintain safety of a system. The control unit includes an external WDT to detect an abnormality of the MCU, a reset circuit to reset the MCU when the external WDT detects the abnormality of the MCU, and an ON/OFF control section to turn a gate of the semiconductor switching device on or off in accordance with the external WDT. The inverter is stopped by turning the gate off via the ON/OFF control section when the external WDT is a disable state. When the abnormality of the MCU is not detected in an enable state, the inverter is driven by turning the gate on via the ON/OFF control section. When the abnormality of the MCU is detected, the inverter is stopped by turning the gate off via the ON/OFF control section and the MCU is reset by the reset circuit.

公开(公告)号：US10457321B2

公开(公告)日：2019-10-29

申请号：US16139585

申请日：2018-09-24

Applicant: NSK LTD.

Inventor： Shin Kumagai ,  Kyosho Uryu ,  Nobuhiko Ando

IPC: B62D5/04 ,  H02P27/06 ,  H02M1/36 ,  H02M7/5387 ,  H02P27/08 ,  H02M1/32 ,  B62D6/00 ,  H02M7/48 ,  H03K17/082 ,  H02P29/024

Abstract: An electronic control unit diagnoses a short failure of an inverter FETs and diagnoses whether the failure of the FET-short detecting section has occurred. The unit controls a motor through an inverter including a bridge having an upper-stage FETs and a lower-stage FETs via an MCU, having: an FET-short detecting section to detect a short failure of the upper-stage FETs and the lower-stage FETs based on respective connection point voltages of the upper-stage FETs and the lower-stage FETs; and a diagnostic function to detect a failure of the FET-short detecting section. The diagnostic function diagnoses the failure of the FET-short detecting section at start up and turns-OFF the upper-stage FETs and the lower-stage FETs when the failure is detected. The FET-short detecting section diagnoses the short failure of the upper-stage FETs and the lower-stage FETs when the failure of the FET-short detecting section is not detected.

公开(公告)号：US10377413B2

公开(公告)日：2019-08-13

申请号：US16139635

申请日：2018-09-24

Applicant: NSK LTD.

Inventor： Shin Kumagai ,  Kyosho Uryu ,  Nobuhiko Ando

IPC: B62D5/04 ,  B62D6/00 ,  H02M1/32 ,  H02M1/36 ,  H02M7/48 ,  H02P27/06 ,  H02P27/08 ,  G01R31/327 ,  H02M7/5387 ,  H02P29/024 ,  H03K17/082

Abstract: An electronic control unit diagnoses a short failure of an inverter FETs and diagnoses whether the failure of the FET-short detecting section has occurred. The unit controls a motor through an inverter including a bridge having an upper-stage FETs and a lower-stage FETs via an MCU, having: an FET-short detecting section to detect a short failure of the upper-stage FETs and the lower-stage FETs based on respective connection point voltages of the upper-stage FETs and the lower-stage FETs; and a diagnostic function to detect a failure of the FET-short detecting section. The diagnostic function diagnoses the failure of the FET-short detecting section at start up and turns-OFF the upper-stage FETs and the lower-stage FETs when the failure is detected. The FET-short detecting section diagnoses the short failure of the upper-stage FETs and the lower-stage FETs when the failure of the FET-short detecting section is not detected.

公开(公告)号：US10543869B2

公开(公告)日：2020-01-28

申请号：US16139664

申请日：2018-09-24

Applicant: NSK LTD.

Inventor： Shin Kumagai ,  Kyosho Uryu ,  Nobuhiko Ando

IPC: B62D5/04 ,  H02M1/32 ,  H03K17/082 ,  H02P29/024 ,  H02P27/06 ,  H02M1/36 ,  H02M7/5387 ,  H02P27/08 ,  B62D6/00 ,  H02M7/48 ,  G01R31/327

Abstract: An electronic control unit diagnoses a short failure of an inverter FETs and diagnoses whether the failure of the FET-short detecting section has occurred. The unit controls a motor through an inverter including a bridge having an upper-stage FETs and a lower-stage FETs via an MCU, having: an FET-short detecting section to detect a short failure of the upper-stage FETs and the lower-stage FETs based on respective connection point voltages of the upper-stage FETs and the lower-stage FETs; and a diagnostic function to detect a failure of the FET-short detecting section. The diagnostic function diagnoses the failure of the FET-short detecting section at start up and turns-OFF the upper-stage FETs and the lower-stage FETs when the failure is detected. The FET-short detecting section diagnoses the short failure of the upper-stage FETs and the lower-stage FETs when the failure of the FET-short detecting section is not detected.

公开(公告)号：US10259491B2

公开(公告)日：2019-04-16

申请号：US15317572

申请日：2015-05-08

Applicant: NSK Ltd.

Inventor： Naoto Shinkawa ,  Shigeru Fukinuki ,  Shin Kumagai ,  Shigeru Shimakawa ,  Teruyoshi Kogure

IPC: H02P29/68 ,  B62D5/04 ,  H02P27/08

Abstract: An electric power steering apparatus that drive-controls a motor by an inverter, and a motor release-switch is connected between the inverter and the motor, comprising: a control section to detect an assist state on a driving control system and to ON/OFF-switch a control of the inverter based on a detection result; a motor rotational number detecting section to detect a rotational number of the motor; an energy calculating section to calculate an energy of a motor back-EMF and a regenerative current based on the rotational number; and a judging section to compare the energy with an area of safety operation of the motor release-switch and to OFF-switch the d motor release-switch when the energy becomes within the area of safety operation. As occasion demands, the area of safety operation is calculated with the temperature.

公开(公告)号：US10077070B2

公开(公告)日：2018-09-18

申请号：US15102387

申请日：2015-06-12

Applicant: NSK LTD.

Inventor： Kyosho Uryu ,  Shin Kumagai

IPC: B62D5/04 ,  G07C5/08

CPC classification number: B62D5/049 ,  B60R16/02 ,  B62D5/04 ,  B62D5/0463 ,  B62D5/0484 ,  B62D6/00 ,  G07C5/0808

Abstract: A power-source voltage diagnostic device of an electric power steering apparatus that improves the performance for the anomalous detection of the motor power-source voltage VR-detecting circuit and is capable of continuing the assist control even if the extraordinary state is detected. When the failure (extraordinary state) detection of the VR-detecting circuit is performed by using the correlation between Vbat1-voltage obtained by the detecting section (Vbat1-detecting circuit) to detect the control voltage from the control power-source circuit and VR-voltage obtained by the detecting circuit (VR-detecting circuit) to detect the motor power-source voltage from the power source circuit, multiplexing is performed by providing VR-detecting circuits (VR-detecting circuit 1, VR-detecting circuit 2) of two systems and mutually comparing them so as to accurately perform the failure diagnosis of the VR-detecting circuits.