公开(公告)号：US20180294711A1

公开(公告)日：2018-10-11

申请号：US15943164

申请日：2018-04-02

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida

IPC: H02M1/32 ,  H02M7/219 ,  H02J7/00 ,  H02M1/08

CPC classification number: H02M1/32 ,  G01R31/00 ,  H02H9/00 ,  H02J7/0052 ,  H02J7/345 ,  H02M1/08 ,  H02M7/219 ,  H02M2001/0009 ,  H02M2001/0025 ,  H02P7/00

Abstract: A converter apparatus includes: a converter for converting an AC voltage into a DC voltage; a DC link capacitor connected to the converter; a voltage detector for DC link voltage; a charging circuit for the DC link capacitor; a charging circuit controller for a switch connected with a charging resistor; a current detector for detecting a current of the converter; a turn-on controller for controlling the turning-on of power devices; a switch for connecting or disconnecting a power supply; a power supply monitor for monitoring a connection state of the power supply; a threshold value setter for setting a first or second threshold value; and a failure detector for determining the presence or absence of the failure of the power devices by a comparison between a current flowing upon turning on the power device, immediately after disconnection of the power supply, and the first or second threshold value.

公开(公告)号：US20180138852A1

公开(公告)日：2018-05-17

申请号：US15724552

申请日：2017-10-04

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida

IPC: H02P29/024 ,  H02P27/06 ,  H02M7/00

CPC classification number: H02P29/0241 ,  H02M7/003 ,  H02P27/06

Abstract: Provided is a motor driver including: a converter that converts an AC voltage into a DC voltage; an inverter that inverts the DC voltage into a multi-phase AC voltage for motor driving; a short bar fixed to an output terminal of the converter and an input terminal of the inverter by screw fastening; a first voltage detector that detects a voltage across the output terminals of the converter; a second voltage detector that detects a voltage across the input terminals of the inverter; and a reporting unit that provides, when a difference between the voltage detected by the first voltage detector and the voltage detected by the second voltage detector exceeds a predetermined threshold, a report relating thereto.

公开(公告)号：US09618558B2

公开(公告)日：2017-04-11

申请号：US15071476

申请日：2016-03-16

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida

IPC: H02P7/00 ,  G01R31/02 ,  H02M1/32 ,  H02P27/06 ,  H02M5/458 ,  H02M7/5387 ,  H02M1/00

CPC classification number: G01R31/028 ,  G01R31/42 ,  H02M1/32 ,  H02M5/458 ,  H02M7/5387 ,  H02M2001/008 ,  H02P27/06

Abstract: A motor driving apparatus includes: a voltage detecting unit for detecting a voltage of each direct-current capacitor; a current detecting unit for detecting each current inputted to or outputted from each inverter; an commanding unit for outputting a power-converting command to each inverter after each direct-current capacitor is charged and supply of direct-current power to a converter is shut off; a current integrating unit for integrating each current detected while the power-converting command is outputted; a capacity estimating unit for calculating the estimated capacity of each direct-current capacitor based on the current integration value and the voltage of the direct-current capacitor after supply of direct-current power to the converter is shut off and before the power-converting command is outputted; and a life determining unit for determining a life of each direct-current capacitor based on the initial capacity value and the estimated capacity of the direct-current capacitor.

公开(公告)号：US09071182B2

公开(公告)日：2015-06-30

申请号：US14020280

申请日：2013-09-06

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida ,  Shinichi Horikoshi

IPC: H02P3/14 ,  H02P6/24 ,  H02P29/02 ,  H02H7/10

CPC classification number: H02P6/24 ,  H02H7/10 ,  H02P29/024 ,  H02P29/0241

Abstract: A motor drive device includes a converter which mutually converts power between AC power and DC power, an inverter which converts the DC power into AC power for driving a motor to output to a motor side, and converts regenerated AC power from the motor side into DC power to output to the DC side, a DC link unit which connects a DC side of the converter and a DC side of the inverter, a voltage detecting unit which detects a DC voltage value, an alarm level setting unit which sets an alarm level of the DC voltage value, an alarm determining unit which determines whether or not the DC voltage value exceeds the alarm level, and an alarm reporting unit which instructs the inverter to stop conversion operation when it is determined that the voltage value exceeds the alarm level.

Abstract translation: 一种电动机驱动装置，具备：交流电力与直流电力之间相互转换电力的转换器，将直流电力转换为交流电力以驱动电动机输出到电动机侧的逆变器，将从电动机侧的再生交流电力变换为直流 输出到DC侧的功率，连接转换器的直流侧的直流侧单元和逆变器的直流侧的直流侧单元，检测直流电压值的电压检测单元，设定报警水平的报警水平设定单元 直流电压值，确定直流电压值是否超过警报水平的报警确定单元，以及当确定电压值超过警报水平时，指示逆变器停止转换操作的报警报告单元。