公开(公告)号：US20170297612A1

公开(公告)日：2017-10-19

申请号：US15507814

申请日：2015-09-02

Applicant: NSK LTD.

Inventor： Kyosho URYU ,  Shigeru FUKINUKI

IPC: B62D5/04 ,  H02P6/28 ,  B62D6/08 ,  H02P6/12

CPC classification number: B62D5/0463 ,  B62D5/0457 ,  B62D5/0475 ,  B62D5/0481 ,  B62D6/08 ,  H02P6/12 ,  H02P6/28 ,  H02P27/06

Abstract: A motor control unit which drives a motor through an inverter based on a calculated command value of a control section to which a power supply voltage is supplied, including: a charging/discharging mechanism for charging and discharging electric charges of an inverter voltage supplied to the inverter; and a separation means for separating the charging/discharging mechanism from the power supply voltage, wherein when a warning signal informing of a drop in the power supply voltage is inputted, the charging/discharging mechanism is separated from the power supply voltage by the separation means as well as a voltage is applied to the control section from the charging/discharging mechanism to avoid power supply reset of the control section. The motor may be a motor with multi-system windings.

公开(公告)号：US20180154931A1

公开(公告)日：2018-06-07

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: B62D5/04 ,  H02P27/08 ,  H02P29/68

CPC classification number: B62D5/0484 ,  B62D5/046 ,  B62D5/0481 ,  B62D5/0496 ,  H02P27/08 ,  H02P29/68

Abstract: [Problem]An object of the present invention is to provide a motor control apparatus that, with a high reliability, protects the motor release-switch comprising the semiconductor switching elements in small size and an electric power steering apparatus provided the same.[Means for solving the problem]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：US20150334822A1

公开(公告)日：2015-11-19

申请号：US14760900

申请日：2014-01-09

Applicant: NSK LTD.

Inventor： Naoto SHINKAWA ,  Shigeru FUKINUKI

IPC: H05K1/02 ,  H05K1/16 ,  H05K1/11

CPC classification number: H05K1/0231 ,  B62D5/0406 ,  H01L2224/4103 ,  H01L2924/00014 ,  H05K1/0233 ,  H05K1/0298 ,  H05K1/115 ,  H05K1/141 ,  H05K1/162 ,  H05K1/18 ,  H05K2201/042 ,  H05K2201/097 ,  H05K2201/1006 ,  H01L2224/37099

Abstract: There is provided a printed circuit substrate and a noise suppression structure capable of minimizing constraint on a component layout on a substrate and suppressing noise. The printed circuit substrate includes conductive patterns of odd numbered layers and conductive patterns of even numbered layers which are alternately arranged in a vertical direction and hold an insulating layer between each layer. Portions excepting predetermined areas for connecting a first through-hole and predetermined areas for insulating from a second through-hole in the conductive patterns of the odd numbered layers have a same shape as portions excepting predetermined areas for connecting the second through-hole and predetermined areas for insulating the first through-hole in the conductive patterns of the even numbered layers, and the portions are laminated on one another at the same position in the vertical direction.

Abstract translation: 提供了能够最小化对基板上的部件布局的约束并抑制噪声的印刷电路基板和噪声抑制结构。 印刷电路基板包括偶数层的导电图案和偶数层的导电图案，其在垂直方向上交替布置并且在每层之间保持绝缘层。 除了用于连接第一通孔的预定区域和用于与奇数层的导电图案中的第二通孔绝缘的预定区域之外的部分具有与用于连接第二通孔和预定区域的预定区域之外的部分相同的形状 用于绝缘偶数层的导电图案中的第一通孔，并且这些部分在垂直方向上的相同位置彼此层叠。

公开(公告)号：US20140184107A1

公开(公告)日：2014-07-03

申请号：US14200858

申请日：2014-03-07

Applicant: NSK Ltd. ,  KABUSHIKI KAISHA TOSHIBA

Inventor： Sari MAEKAWA ,  Shigeru FUKINUKI ,  Shin KUMAGAI

IPC: H01L29/00 ,  H02P27/06 ,  H02M7/5387

CPC classification number: H01L29/00 ,  H02J7/0034 ,  H02M7/48 ,  H02M7/53871 ,  H02P27/06 ,  H02P29/027 ,  Y10T307/76

Abstract: A switch driving circuit electrically opens and closes a switch circuit including two N-channel type semiconductor switching elements series connected in a reverse direction, thereby electrically opening and closing a path between a DC power supply and an inverter circuit. The switch driving circuit has a reference potential point in common with the inverter circuit and supplies an opening/closing control signal to the switch circuit. The switch driving circuit includes a half bridge circuit including two semiconductor switching elements series connected between a driving power supply and the reference potential point. Two protection diodes are connected in parallel to the semiconductor switching elements respectively. At least one current blocking diode is configured to block current from flowing from the reference potential point through the diode to the switching circuit side when the DC power supply is connected to the inverter circuit in reverse polarity.

Abstract translation: 开关驱动电路电开路和闭合包括逆向连接的两个N沟道型半导体开关元件的开关电路，从而电连接直流电源和逆变器电路之间的路径。 开关驱动电路具有与逆变器电路相同的参考电位，并向开关电路提供开/关控制信号。 开关驱动电路包括半桥电路，其包括连接在驱动电源和参考电位点之间的两个半导体开关元件。 两个保护二极管分别与半导体开关元件并联连接。 当DC电源以反极性连接到逆变器电路时，至少一个电流阻塞二极管被配置为阻止电流从参考电位点通过二极管流到开关电路侧。