公开(公告)号：US09604666B2

公开(公告)日：2017-03-28

申请号：US14777547

申请日：2013-03-18

Applicant: NSK LTD.

Inventor： Sachio Nakayama ,  Toru Sakaguchi ,  Yuzuru Hoshi ,  Shinichi Tanaka ,  Masanori Shingou

IPC: B62D5/04

CPC classification number: B62D5/0463 ,  B62D5/0481

Abstract: An electric power steering apparatus that protects Zener diodes without impairing steering performances by time-integrating a loss power of the Zener diodes for protecting FETs and gradually limiting a duty ratio with an increase in an integrating loss. The apparatus includes a loss power calculating section that calculates a loss power when a difference between an ignition voltage and an inverter applying voltage is equal to or more than a predetermined voltage; an integrating loss calculating section to calculate an integrating loss of the loss power; a permissible loss calculating section to calculate a permissible loss based on a temperature; a minimum value selecting section to select a minimum value of a loss difference of the permissible loss and the integrating loss; and a limit value calculating section to calculate a limit value of the PWM-signal based on the minimum value of the loss difference and the permissible loss.

公开(公告)号：US08831832B2

公开(公告)日：2014-09-09

申请号：US14234176

申请日：2013-03-28

Applicant: NSK Ltd.

Inventor： Yuzuru Hoshi ,  Toru Sakaguchi ,  Sachio Nakayama ,  Masahiro Maeda ,  Kenji Mori ,  Yousuke Imamura

IPC: A01B69/00 ,  H02P21/00 ,  B62D5/04 ,  H02P6/08 ,  B60T8/1755 ,  B62D6/00 ,  B62D7/15

CPC classification number: H02P21/0035 ,  B60T8/1755 ,  B62D5/046 ,  B62D5/0463 ,  B62D5/0484 ,  B62D5/049 ,  B62D6/003 ,  B62D6/008 ,  B62D7/159 ,  H02M7/5395 ,  H02M2001/0009 ,  H02P6/08 ,  H02P29/0241

Abstract: A motor control apparatus that is capable of making the whole control system robust not only with respect to motor parameter variations such as the temperature variation and the manufacturing unevenness but also with respect to disturbances while using a cheap and compact one-shunt type current detecting circuit and simultaneously diagnosing an estimation error and an electric power steering apparatus provide with the motor control apparatus.

Abstract translation: 一种电动机控制装置，其能够使整个控制系统不仅在诸如温度变化和制造不均匀性之间的电动机参数变化方面稳固，而且在使用便宜且紧凑的单分流型电流检测电路 同时诊断估计误差和电动助力转向装置提供电动机控制装置。

公开(公告)号：US20140156144A1

公开(公告)日：2014-06-05

申请号：US14234176

申请日：2013-03-28

Applicant: NSK LTD.

Inventor： Yuzuru Hoshi ,  Toru Sakaguchi ,  Sachio Nakayama ,  Masahiro Maeda ,  Kenji Mori ,  Yousuke Imamura

IPC: H02P21/00 ,  B62D5/04 ,  H02P6/08

CPC classification number: H02P21/0035 ,  B60T8/1755 ,  B62D5/046 ,  B62D5/0463 ,  B62D5/0484 ,  B62D5/049 ,  B62D6/003 ,  B62D6/008 ,  B62D7/159 ,  H02M7/5395 ,  H02M2001/0009 ,  H02P6/08 ,  H02P29/0241

Abstract: A motor control apparatus that is capable of making the whole control system robust not only with respect to motor parameter variations such as the temperature variation and the manufacturing unevenness but also with respect to disturbances while using a cheap and compact one-shunt type current detecting circuit and simultaneously diagnosing an estimation error and an electric power steering apparatus provide with the motor control apparatus.

Abstract translation: 一种电动机控制装置，其能够使整个控制系统不仅在诸如温度变化和制造不均匀性之间的电动机参数变化方面稳固，而且在使用便宜且紧凑的单分流型电流检测电路 同时诊断估计误差和电动助力转向装置提供电动机控制装置。