公开(公告)号：US20170063279A1

公开(公告)日：2017-03-02

申请号：US15241507

申请日：2016-08-19

Applicant: FANUC CORPORATION

Inventor： Masaya Tateda ,  Youichirou Ooi ,  Akira Hirai ,  Kiichi Inaba

IPC: H02P29/024

CPC classification number: H02P29/024 ,  H02P3/22 ,  H02P29/0241

Abstract: A motor drive apparatus according to the present invention comprises: an electric shunt which shunts a current flowing through a power line connected to a motor; a first current detection unit and a second detection unit, each disposed on either side of a node shunted by the electric shunt, for detecting the current flowing through the power line; a shunt commanding unit which gives a shunt command to the electric shunt to effect shunting of the current; and a determining unit which determines the presence or absence of a fault in the electric shunt, based on the shunt command and on current values detected by the first current detection unit and the second detection unit.

Abstract translation: 根据本发明的电动机驱动装置包括：分流器，其分流流过连接到电动机的电力线的电流; 第一电流检测单元和第二检测单元，每个设置在由分流器分流的节点的任一侧，用于检测流过电力线的电流; 分配指令单元，给分流指令分配电流以分流电流; 以及确定单元，其基于所述分流命令和由所述第一电流检测单元和所述第二检测单元检测到的电流值来确定所述电分路中的故障的存在或不存在。

公开(公告)号：US09526173B2

公开(公告)日：2016-12-20

申请号：US13955133

申请日：2013-07-31

Applicant: FANUC Corporation

Inventor： Norihiro Chou ,  Kiichi Inaba

IPC: H05K1/18 ,  H05K5/03 ,  H01R13/52

CPC classification number: H05K1/181 ,  H01R13/5227 ,  H05K5/03 ,  Y10S220/06

Abstract: An attachment capable of preventing liquid from adhering to a specific electronic component within an electronic device. An electronic substrate has an attachment which can be attached to and detached from the electronic substrate. The attachment has an attachment part detachably attached to an edge of the electronic substrate; and a shield part connected to or integrally formed with the attachment part. The attachment part is a clip-like member having a certain degree of elasticity, and is configured to grip an edge of the electronic substrate so that the attachment is held at a predetermined place. The shield part has an inclined surface, and is configured to shield the electronic component so that liquid, such as a splash or droplet moving toward the electronic component, does not adhere to the component when the attachment is held at the predetermined place.

Abstract translation: 能够防止液体粘附到电子设备内的特定电子部件的附件。 电子基板具有可以附着到电子基板上并从电子基板上拆下的附件。 附件具有可拆卸地附接到电子基板的边缘的附接部分; 以及与所述附接部连接或一体地形成的屏蔽部。 附着部是具有一定程度的弹性的夹状构件，并且被构造成夹持电子基板的边缘，使得附件保持在预定的位置。 屏蔽部分具有倾斜表面，并且被构造成屏蔽电子部件，使得当附件保持在预定位置时，液体，例如朝向电子部件移动的飞溅或液滴不粘附到部件上。

公开(公告)号：US08878388B2

公开(公告)日：2014-11-04

申请号：US13924796

申请日：2013-06-24

Applicant: FANUC Corporation

Inventor： Naoki Masuda ,  Kiichi Inaba

IPC: H02J3/14 ,  H02M1/10 ,  H02P1/00 ,  H02J9/00

CPC classification number: H02J9/005 ,  H02J3/14 ,  H02P1/00 ,  H02P21/22 ,  H02P29/026 ,  Y10T307/391

Abstract: A motor control device has a current value sampling unit configured to sample a current value of a motor, a PWM signal generation unit configured to generate a PWM signal to drive the motor, based on the sampled current value of the motor, and a power supply stop unit configured to stop supply of power from a control power supply to a peripheral depending on power stored in a DC link part and power to which the control power source can supply when an alternating-current power source fails.

Abstract translation: 电动机控制装置具有：电流值采样单元，被配置为对电动机的当前值进行采样; PWM信号生成单元，被配置为基于电动机的采样电流值产生用于驱动电动机的PWM信号;以及电源 停止单元，其被配置为根据存储在直流链路部分中的功率和当交流电源故障时控制电源可以供应的电力来停止从控制电源向外围设备供电。

公开(公告)号：US10727775B2

公开(公告)日：2020-07-28

申请号：US15479469

申请日：2017-04-05

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida ,  Kiichi Inaba ,  Shigeki Hanyuu

IPC: H02P27/08 ,  H02M5/458 ,  H02M1/14 ,  H02P6/14

Abstract: To provide a motor drive device that suppresses voltage fluctuation of a DC link capacitor, as well as enabling for low cost and size reduction. A motor control unit sets a threshold of voltage at which to start regeneration to a first threshold in a case of an increased amount per unit time of a DC voltage value detected by a voltage detection part being less than a certain amount, and sets the threshold of voltage at which to start regeneration to a second threshold that is larger than the first threshold, in a case of the increased amount per unit time of the DC voltage value detected by the voltage detection part being at least a certain amount.

公开(公告)号：US10250108B2

公开(公告)日：2019-04-02

申请号：US15948035

申请日：2018-04-09

Applicant: FANUC CORPORATION

Inventor： Shinichi Mizukami ,  Kiichi Inaba

IPC: H05K1/18 ,  H02K11/33 ,  H05K3/10 ,  H03K17/567 ,  H01F27/02 ,  H05K1/02 ,  H03K17/691

Abstract: A motor driving device is equipped with a printed board, a plurality of secondary voltage elements mounted on the printed board and which are used only with a secondary voltage, a plurality of primary voltage elements disposed on a surface on a side opposite to a surface on which the plurality of secondary voltage elements are mounted on the printed board, and which are used only with a primary voltage that is higher than the secondary voltage, and first conductive materials, which extend from an upper portion of the printed board to control terminals (command signal input portion) of the primary voltage elements, for the purpose of transmitting command signals from the secondary voltage elements to the primary voltage elements.

公开(公告)号：US10189135B2

公开(公告)日：2019-01-29

申请号：US15217075

申请日：2016-07-22

Applicant: FANUC CORPORATION

Inventor： Yuuki Kumamoto ,  Yasuyuki Matsumoto ,  Kiichi Inaba ,  Naoki Masuda

IPC: B23Q17/00 ,  B23Q11/10

Abstract: A motor drive device is capable of allowing a user to surely recognize that effect when a cutting fluid adheres to a casing. The motor drive device includes an electronic component and a casing that houses the electronic component. A part of the casing changes color when coming in contact with a cutting fluid and the casing may change to different colors based on the concentration of the cutting fluid.

公开(公告)号：US10122316B2

公开(公告)日：2018-11-06

申请号：US15345629

申请日：2016-11-08

Applicant: FANUC CORPORATION

Inventor： Hironao Tanouchi ,  Yasuyuki Matsumoto ,  Naoki Masuda ,  Kiichi Inaba

IPC: H02H3/20 ,  H02P29/032 ,  H02H7/09 ,  H02H11/00

Abstract: A motor drive apparatus in which a main power supply used for motor drive is supplied via a magnetic contactor includes: a monitoring unit that monitors a main power supply voltage at an AC power supply input side of the magnetic contactor in a state in which contacts of the magnetic contactor are opened; a determination unit that determines whether the main power supply voltage monitored by the monitoring unit is normal; and a magnetic contactor control unit that outputs a command that controls opening and closing of contacts of the magnetic contactor, wherein when it is determined by the determination unit that the main power supply voltage is abnormal, the magnetic contactor control unit maintains an output of an open command such that the contacts of the magnetic contactor are opened.

公开(公告)号：US09912281B2

公开(公告)日：2018-03-06

申请号：US15246657

申请日：2016-08-25

Applicant: FANUC CORPORATION

Inventor： Nobuo Hirayama ,  Taku Sasaki ,  Kiichi Inaba

IPC: H02P7/00 ,  H02P29/40 ,  H02P27/06 ,  H02P27/08 ,  H02P29/024

CPC classification number: H02P29/40 ,  H02P27/06 ,  H02P27/08 ,  H02P29/027

Abstract: A motor driving apparatus includes a motor driving unit for converting DC voltage on a DC link into AC voltage when a switching device is turned on/off and outputting the AC voltage to an AC motor side, a gate driving circuit for turning on/off the switching device, a gate driving command generation unit for outputting either one of an ON command and an OFF command to the gate driving circuit, and an overcurrent detection unit for detecting an overcurrent with respect to a DC link current or an alternating current on the AC motor side, wherein, when the overcurrent detection unit detects the overcurrent, the gate driving command generation unit alternately outputs the ON command and the OFF command while gradually increasing a ratio of the OFF command to the ON command and ultimately outputs only the OFF command.

公开(公告)号：US09807873B2

公开(公告)日：2017-10-31

申请号：US15189101

申请日：2016-06-22

Applicant: FANUC CORPORATION

Inventor： Yasuyuki Matsumoto ,  Kiichi Inaba

IPC: G01R31/40 ,  G01R31/3187 ,  H05K1/02 ,  H05K1/18 ,  H05K1/09

CPC classification number: H05K1/0268 ,  H05K1/0272 ,  H05K1/09 ,  H05K1/181 ,  Y02P70/611

Abstract: A printed circuit board according to an embodiment of the present invention is formed of an insulating material and configured to mount components and wiring thereon. The printed circuit board includes a liquid pool for storing a liquid; a pair of deterioration detection traces one of which is connected to a power supply at one end and disposed in the liquid pool at the other end, and the other of which is connected to a ground at one end through a resistor and disposed in the liquid pool at the other end; a voltage detection circuit for detecting a voltage between the one ends of the one and the other deterioration detection traces; and a deterioration determination circuit for determining, based on the detected voltage, whether or not insulation deteriorates between the other ends of the one and the other deterioration detection traces.

公开(公告)号：US20170108071A1

公开(公告)日：2017-04-20

申请号：US15289238

申请日：2016-10-10

Applicant: FANUC CORPORATION

Inventor： Sou Saito ,  Tsutomu Shikagawa ,  Kiichi Inaba

IPC: F16D66/02

CPC classification number: F16D66/022 ,  B60T17/221

Abstract: A motor drive apparatus includes: a motor current detection unit; a brake release determination unit that determines that the brake is not released when the motor current detected when the motor is operated under a predetermined load by application of a voltage to a brake coil is larger than a current for when the brake is normally released; a brake coil voltage change unit that changes a voltage applied to the brake coil when it is determined that the brake is not released to a larger value; a change history storage unit that stores the voltage after being changed and change date and time; and a life prediction unit that calculates a predicted life of the brake apparatus based on the voltage after being changed and the change date and time and the previously stored failure-time brake coil voltage.