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

IPC: H02P27/06 ,  G01R27/08 ,  G01R31/34 ,  H02P5/00

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.

公开(公告)号：US20180348284A1

公开(公告)日：2018-12-06

申请号：US15982182

申请日：2018-05-17

Applicant: FANUC CORPORATION

Inventor： Masaya Tateda ,  Yasuyuki Matsumoto

IPC: G01R31/02 ,  H02M7/493 ,  G01R19/00 ,  G01R19/04 ,  G01R19/10 ,  H02P27/06 ,  G01R27/26

CPC classification number: G01R31/028 ,  G01R19/0015 ,  G01R19/04 ,  G01R19/10 ,  G01R27/2605 ,  G01R31/025 ,  G01R31/42 ,  H02M5/458 ,  H02M7/493 ,  H02P5/74 ,  H02P27/06 ,  H02P29/0241 ,  H02P29/032

Abstract: A motor drive apparatus includes a converter, a DC link capacitor, a plurality of inverters, a diagnosis command unit configured to give a command to one of the plurality of inverters to perform power conversion, an AC voltage detection unit configured to detect a peak value of AC voltage on an AC input side of the converter, a DC voltage detection unit configured to detect a value of DC voltage across the DC link capacitor, a calculation unit to calculate a difference between the value of DC voltage and the peak value of AC voltage, a storage unit configured to store the difference in association with the inverters, and a leakage current determination unit configured to determine that the inverter associated with the largest of the differences stored in the storage unit is the inverter that has caused the largest leakage current.

公开(公告)号：US10090795B2

公开(公告)日：2018-10-02

申请号：US15441809

申请日：2017-02-24

Applicant: FANUC CORPORATION

Inventor： Masaya Tateda

IPC: H02P29/032 ,  H02P27/06 ,  H02P6/24

Abstract: A motor drive according to the present invention includes an inverter, a motor rotational speed obtaining unit, a motor inertia information storage unit, a motor rotational energy calculator, a dynamic braking circuit, a tolerance information storage unit for storing the tolerances of resistors of the dynamic braking circuit, a power element operation unit, a dynamic braking circuit operation unit, and a tolerance comparator for performing a comparison between the rotational energy of a motor and the tolerance of the dynamic braking circuit. When the rotational energy exceeds the tolerance, power elements of one of arms are turned on, while power elements of the other arm are turned off, without actuating the dynamic braking circuit. When the rotational energy is equal to or less than the tolerance, the dynamic braking circuit is actuated, and the power elements of the one of the arms are turned off.

公开(公告)号：US20150293165A1

公开(公告)日：2015-10-15

申请号：US14685672

申请日：2015-04-14

Applicant: FANUC CORPORATION

Inventor： Masaya Tateda ,  Hiroyasu Sato ,  Akira Hirai

IPC: G01R31/02 ,  H02P31/00

CPC classification number: G01R31/025 ,  G01R31/42 ,  G01R35/00 ,  H02H11/005 ,  H02P29/0241

Abstract: A motor drive device includes a power source unit rectifying AC voltage to DC voltage and to smooth the DC voltage by a capacitor, a motor drive amplification, a power source voltage measurement unit, an insulation resistance deterioration detection unit having a contact unit connecting one end of the capacitor to the ground and a current detection unit provided between the other end of the capacitor and a motor coil, and detecting a deterioration in an insulation resistance of the motor based on a detected signal obtained from a closed circuit formed by the contact unit, the capacitor, the motor coil, and the ground by using the current detection unit, and a failure detection unit detecting a failure in the insulation resistance deterioration detection unit based on the detected signal in the insulation resistance deterioration detection unit and a voltage value measured by the power source voltage measurement unit.

Abstract translation: 电动机驱动装置包括：电源单元，其将交流电压与直流电压整流，并通过电容器平滑直流电压;马达驱动放大;电源电压测量单元;绝缘电阻劣化检测单元，具有连接一端的接触单元 的电容器和设置在电容器的另一端与电动机线圈之间的电流检测单元，并且基于从由接触单元形成的闭合电路获得的检测信号来检测电动机的绝缘电阻的劣化 电容器，电动机线圈和接地;以及故障检测单元，其基于绝缘电阻劣化检测单元中的检测信号和测量的电压值来检测绝缘电阻劣化检测单元的故障 由电源电压测量单元。

公开(公告)号：US10984949B2

公开(公告)日：2021-04-20

申请号：US16831641

申请日：2020-03-26

Applicant: FANUC CORPORATION

Inventor： Yuuki Inoue ,  Masaya Tateda

IPC: H05K1/18 ,  H01G2/06 ,  H05K3/30

Abstract: A resin molded substrate has at least a pair of terminal through holes for allowing lead terminals of a cylindrical capacitor to be inserted through, and at least one protrusion for supporting a side of a bottom portion of the capacitor so as to space from a front surface of the substrate the side of the bottom portion of the capacitor having the lead terminals inserted through the terminal through holes. The pair of lead terminals at the bottom portion are inserted through the terminal through holes of the resin molded substrate, whereby the capacitor is mounted in an upright state with a solder, so that the protrusion spaces the side of the bottom portion from the front surface of the resin molded substrate.

公开(公告)号：US10587213B2

公开(公告)日：2020-03-10

申请号：US15982433

申请日：2018-05-17

Applicant: FANUC CORPORATION

Inventor： Masaya Tateda ,  Yasuyuki Matsumoto

IPC: H02P11/04 ,  G01R31/40 ,  H02P29/024 ,  G01R31/02 ,  H02P7/28 ,  G01R19/165

Abstract: A motor drive apparatus includes a converter configured to convert AC power inputted by an AC power supply to DC power and to output the same to a DC link, a DC link capacitor provided for the DC link, an inverter configured to convert the DC power in the DC link to AC power for driving a motor and to output the AC power, a DC voltage detection unit configured to detect a value of DC voltage applied across the DC link capacitor, an AC voltage detection unit configured to detect a peak value of AC voltage on an AC input side of the converter, and a leakage current detection unit configured to detect a leakage current caused by driving the motor, based on the value of DC voltage detected by the DC voltage detection unit and the peak value of AC voltage detected by the AC voltage detection unit.

公开(公告)号：US10554165B2

公开(公告)日：2020-02-04

申请号：US16267790

申请日：2019-02-05

Applicant: FANUC CORPORATION

Inventor： Yuuta Gotou ,  Yasuyuki Matsumoto ,  Masaya Tateda

IPC: G05B5/00 ,  H02H7/08 ,  H02P29/00 ,  H02P23/14 ,  H02P27/06

Abstract: A motor drive apparatus includes a converter configured to convert AC power of an AC power supply into DC power and outputs the DC power, a DC link unit including capacitors connected in series with each other, an inverter connected in parallel with the DC link unit, and configured to convert the DC power of the DC link unit into AC power for driving a motor, and outputs the AC power, and a short-circuit judgment unit configured to judge that at least one of the capacitors in the DC link unit has shorted in the case where, when the value of a voltage applied to a positive and negative bipolar terminal of the DC link unit is smaller than a first threshold, the value of an input current flowing from the AC power supply into the DC link unit via the converter is larger than a second threshold.

公开(公告)号：US09716461B2

公开(公告)日：2017-07-25

申请号：US15220690

申请日：2016-07-27

Applicant: FANUC CORPORATION

Inventor： Masaya Tateda ,  Akira Hirai ,  Kiichi Inaba

IPC: H02H7/09 ,  H02P29/00 ,  H02P27/06

CPC classification number: H02P29/00 ,  H02M1/32 ,  H02M5/458 ,  H02P27/06 ,  H02P29/024

Abstract: A motor drive includes a DC power supply unit for rectifying electric power supplied from an AC power supply using a rectifier and smoothing the electric power using a capacitor; and a plurality of independent voltage measurement circuits for measuring the voltage of the DC power supply unit. The motor drive, which converts a DC voltage into an AC voltage to drive a motor, includes a voltage collection unit for collecting voltage information obtained from the voltage measurement circuits; a normal operation voltage information storage unit for storing a normal operation voltage; and an abnormality determination unit for identifying an intersection voltage of output signals based on voltage values collected by the voltage collection unit, comparing the intersection voltage with the normal operation voltage, and detecting a broken portion owing to entering foreign matter based on the difference between the intersection voltage and the normal operation voltage.

公开(公告)号：US09404974B2

公开(公告)日：2016-08-02

申请号：US14591500

申请日：2015-01-07

Applicant: FANUC Corporation

Inventor： Hiroyasu Sato ,  Masaya Tateda ,  Akira Hirai

IPC: H02P25/00 ,  H02H7/08 ,  G01R31/34 ,  G01R27/02 ,  G01R31/14

CPC classification number: G01R31/346 ,  G01R27/025 ,  G01R31/14

Abstract: A motor drive device of the present invention includes: a rectification circuit configured to rectify an AC voltage; a power source unit configured to smooth a DC voltage by a capacitor; an inverter unit configured to drive a motor by converting a DC voltage into an AC voltage; a current detection unit configured to measure a current flowing through a resistor which is connected to a coil of the motor and the capacitor; a voltage detection unit configured to measure a value of a voltage across the capacitor; a second switch that grounds the capacitor; and an insulation resistance detection unit configured to detect an insulation resistance value of a motor by using two sets of a current value and a voltage value measured in two states where the second switch is turned off and turned on.

Abstract translation: 本发明的电动机驱动装置包括：整流电路，对交流电压进行整流; 电源单元，被配置为通过电容器平滑DC电压; 逆变器单元，被配置为通过将DC电压转换成AC电压来驱动电动机; 电流检测单元，被配置为测量流过连接到电动机的线圈和电容器的电阻器的电流; 电压检测单元，被配置为测量电容器两端的电压值; 使电容器接地的第二开关; 以及绝缘电阻检测单元，被配置为通过使用两组电流值和在第二开关断开和接通的两种状态下测量的电压值来检测电动机的绝缘电阻值。

公开(公告)号：US11595138B2

公开(公告)日：2023-02-28

申请号：US17129264

申请日：2020-12-21

Applicant: FANUC CORPORATION

Inventor： Daishi Gotou ,  Masaya Tateda

IPC: H03K5/01 ,  H04B17/18 ,  H04L7/00 ,  H02P23/00

Abstract: A monitoring device includes: an acquisition unit for acquiring a clock signal output from a communication circuit that outputs the clock signal; and a monitoring unit for analyzing the waveform of the clock signal acquired by the acquisition unit, based on a predetermined reference clock signal having a period equal to or shorter than a period of the clock signal to thereby determine whether or not there is a sign of malfunction in the communication circuit.