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公开(公告)号：US10425031B2
公开(公告)日：2019-09-24
申请号：US15715294
申请日：2017-09-26
Applicant: FANUC CORPORATION
Inventor： Hiroyasu Satou , Masaya Tateda , Youichirou Ooi , Akira Hirai , Kiichi Inaba
Abstract: In a motor driver of the present invention, voltage and current values measured by a voltage and current detector and a voltage value measured by a voltage detector are determined as first measurement results, in the state of turning on semiconductor switching elements connected between a positive terminal of a capacitor and motor coils. Voltage and current values measured by the voltage and current detector and a voltage value measured by the voltage detector are determined as second measurement results, in the state of, as to a group A, turning on a semiconductor switching element connected between the positive terminal of the capacitor and the motor coil, and as to a group B, turning on semiconductor switching elements connected between a negative terminal of the capacitor and the motor coil. The insulation resistance values are calculated between the motor coils of each group A or B and a ground.
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公开(公告)号：US09933034B2
公开(公告)日：2018-04-03
申请号：US15289238
申请日：2016-10-10
Applicant: FANUC CORPORATION
Inventor： Sou Saito , Tsutomu Shikagawa , Kiichi Inaba
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.
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公开(公告)号：US20170063283A1
公开(公告)日：2017-03-02
申请号：US15246657
申请日：2016-08-25
Applicant: FANUC CORPORATION
Inventor： Nobuo Hirayama , Taku Sasaki , Kiichi Inaba
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.
Abstract translation: 电动机驱动装置包括电动机驱动单元，用于当开关装置接通/断开并将交流电压输出到交流电动机侧时，将直流母线上的直流电压转换为交流电压;门极驱动电路，用于接通/断开 开关装置，用于向门驱动电路输出ON指令和OFF指令中的任一个的栅极驱动指令生成单元和用于检测相对于AC上的DC链路电流或交流电流的过电流的过电流检测单元 电动机侧，当过电流检测单元检测到过电流时，门驱动指令生成单元在逐渐增加OFF指令与ON指令的比率的同时交替地输出ON指令和OFF指令，并最终仅输出OFF指令。
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4.发明申请公开(公告)号：US20160356698A1
公开(公告)日：2016-12-08
申请号：US15153812
申请日：2016-05-13
Applicant: FANUC CORPORATION
Inventor： Norihiro Chou , Kiichi Inaba
IPC: G01N17/00
CPC classification number: G01N17/006 , G01N17/04
Abstract: A corrosion detection circuit according to an embodiment of the present invention includes an insulating board; a test chip having a corrodible metal, mounted on the surface of the insulating board; a plurality of resistors each having a higher resistance value than the test chip after a change due to an environment including contact with the test chip and the adhesion of dust to the test chip; and a voltage detection circuit for detecting the output voltage of a divided voltage output point, when a voltage is applied to the test chip and a voltage dividing circuit using the plurality of resistors. The voltage detection circuit detects a break in the test chip by corrosion based on a variation in the output voltage.
Abstract translation: 根据本发明实施例的腐蚀检测电路包括绝缘板; 具有可腐蚀金属的测试芯片，安装在绝缘板的表面上; 多个电阻器由于包括与测试芯片的接触以及灰尘附着在测试芯片上的环境变化而具有比测试芯片更高的电阻值; 以及电压检测电路，用于当向测试芯片施加电压时，检测分压电压输出点的输出电压，以及使用该多个电阻器的分压电路。 电压检测电路根据输出电压的变化，通过腐蚀来检测测试芯片的断裂。
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公开(公告)号：US20140198455A1
公开(公告)日：2014-07-17
申请号：US14154311
申请日：2014-01-14
Applicant: FANUC CORPORATION
Inventor： Naoki Masuda , Kiichi Inaba
IPC: H05K7/20
CPC classification number: H05K7/209 , G06F1/20 , H02M7/00 , H05K7/20845 , H05K7/2089
Abstract: A compact motor-drive unit wherein each component can be stably fixed to the unit. A motor-drive unit has a plurality of substrates each having a circuit for driving a motor; semiconductor devices mounted on the respective substrates; at least one smoothing capacitor mounted on at least one of the substrates; and a heat radiator having a heat-transferring surface adjacent to the semiconductors. The smoothing capacitor is positioned within a swept area formed by moving the first substrate arranged generally parallel to a base surface, in a counter-front direction, so that the smoothing capacitor is separated from the first substrate.
Abstract translation: 小型电机驱动单元，其中每个部件可以稳定地固定到该单元。 电机驱动单元具有多个基板，每个基板具有用于驱动马达的电路; 安装在各个基板上的半导体器件; 安装在所述至少一个所述基板上的至少一个平滑电容器; 以及具有与半导体相邻的传热表面的散热器。 平滑电容器位于通过使大致平行于基底表面布置的第一基板沿相对前方移动形成的扫掠区域中，使得平滑电容器与第一基板分离。
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Patent Agency Ranking
公开(公告)号：US10456932B2
公开(公告)日：2019-10-29
申请号：US15828484
申请日：2017-12-01
Applicant: FANUC CORPORATION
Inventor： Sou Saitou , Tsutomu Shikagawa , Kiichi Inaba
Abstract: A conduction path structure of a robot in which a conduction path has a simplified structure is provided. A conduction path structure of a robot includes: a structural mechanism which functions as a support and has a conductor portion; an actuator that operates the structural mechanism; and a conduction path through which driving power and/or a control signal is supplied to the actuator, wherein the conduction path also serves as the conductor portion of the structural mechanism.
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公开(公告)号：US10300598B2
公开(公告)日：2019-05-28
申请号：US15484634
申请日：2017-04-11
Applicant: FANUC CORPORATION
Inventor： Sou Saitou , Tsutomu Shikagawa , Kiichi Inaba
Abstract: A robot includes a motor drive power source for converting a voltage supplied from a power source to a motor drive unit-grade voltage and outputting it, a motor drive unit for converting a motor drive unit-grade voltage output from the motor drive power source to a motor drive voltage and outputting it, a motor driven to be rotated by a motor drive voltage output by the motor drive unit, a robot arm on which the motor drive unit and the motor are arranged, and a robot controller which is provided independently of the robot arm and on which the motor drive power source is arranged.
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公开(公告)号：US10179384B2
公开(公告)日：2019-01-15
申请号：US15276875
申请日：2016-09-27
Applicant: FANUC CORPORATION
Inventor： Ryou Matsuda , Yasuyuki Matsumoto , Naoki Masuda , Kiichi Inaba
Abstract: A motor drive system enabling detection of cutting fluid deposited at a housing of electronic components. A housing holding electronic components of a motor drive system has top faces slanted with respect to the horizontal plane so as to guide the deposited cutting fluid. The housing further includes storage parts collecting the cutting fluid guided along the top faces. The storage parts may be graduated so as to enable the collected amount of the cutting fluid to be measured. The storage parts may be configured to be detachable from the housing.
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公开(公告)号：US09966896B2
公开(公告)日：2018-05-08
申请号：US15246641
申请日：2016-08-25
Applicant: FANUC CORPORATION
Inventor： Ryouta Yamaguchi , Taku Sasaki , Kiichi Inaba
Abstract: A motor drive device assembly capable of suppressing differences in temperatures of motor drive devices depending on operational conditions. The motor drive device assembly includes a first motor drive device including a first heatsink, a second motor drive device located adjacent to the first motor drive device and including a second heatsink formed separately from the first heatsink, and a connection part connecting the first heatsink and the second heatsink to each other, to allow thermal conduction between the first heatsink and the second heatsink.
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公开(公告)号：US20180091083A1
公开(公告)日：2018-03-29
申请号：US15715294
申请日：2017-09-26
Applicant: FANUC CORPORATION
Inventor： Hiroyasu Satou , Masaya Tateda , Youichirou Ooi , Akira Hirai , Kiichi Inaba
Abstract: In a motor driver of the present invention, voltage and current values measured by a voltage and current detector and a voltage value measured by a voltage detector are determined as first measurement results, in the state of turning on semiconductor switching elements connected between a positive terminal of a capacitor and motor coils. Voltage and current values measured by the voltage and current detector and a voltage value measured by the voltage detector are determined as second measurement results, in the state of, as to a group A, turning on a semiconductor switching element connected between the positive terminal of the capacitor and the motor coil, and as to a group B, turning on semiconductor switching elements connected between a negative terminal of the capacitor and the motor coil. The insulation resistance values are calculated between the motor coils of each group A or B and a ground.
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