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：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：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.