公开(公告)号：US10564210B2

公开(公告)日：2020-02-18

申请号：US15063926

申请日：2016-03-08

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida

IPC: G01R31/02

Abstract: A life determination device for a DC capacitor includes: a current detecting unit that detects a current outputted from a rectifier; a voltage detecting unit that detects a voltage of the DC capacitor; an initial charging device that performs initial charging of the DC capacitor up to a predetermined voltage value with the current outputted from the rectifier; a current integrating unit that integrates the current detected by the current detecting unit during a period of the initial charging; a capacitance estimating unit that calculates an estimated capacitance of the DC capacitor from the current integration value, the predetermined voltage value, and the voltage of the DC capacitor prior to the initial charging; and life determination unit that determines whether the DC capacitor is at the end of its life based on an initial capacitance value of the DC capacitor in an unused state and the estimated capacitance.

公开(公告)号：US10438738B2

公开(公告)日：2019-10-08

申请号：US16031050

申请日：2018-07-10

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida ,  Masatomo Shirouzu ,  Kenichi Tsukada

IPC: H01F30/12 ,  H01F27/29 ,  H01F27/24 ,  H01F27/34 ,  H01F27/04 ,  H01F27/245 ,  H01F27/28 ,  H01F37/00

Abstract: A reactor includes a terminal block having a plurality of terminals which is coupled to one end of a core body. A plurality of surge protection elements are connected to the plurality of terminals inside the terminal block. Input side extension portions and output side extension portions extending from coils are connected to the plurality of terminals of the terminal block, and a plurality of surge protection elements are connected to the input side extension portions and the output side extension portions, respectively.

公开(公告)号：US10312851B2

公开(公告)日：2019-06-04

申请号：US14942033

申请日：2015-11-16

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida

IPC: H02H7/08 ,  H02P29/024 ,  H02H11/00

Abstract: A motor drive includes a condition detection circuit for monitoring the condition of the drive, an determination circuit for determining whether detected data indicates an abnormality, a memory unit for storing a detection value including at least one of a peak voltage applied to the drive, a peak current flowing through the drive, the cumulative number of occurrences of abnormalities, and variations in the peak voltage or current with time, when the abnormality occurs, and a setting unit for setting in advance set values including an allowable peak voltage and current and the allowable number of occurrences of abnormalities, and allowable variations in the peak voltage and current with time allowable by the drive. Whenever the motor drive is powered on, it is determined whether the detection value reaches the set value. When the detection value reaches the set value, the power-on of the motor drive is prohibited.

公开(公告)号：US20190013136A1

公开(公告)日：2019-01-10

申请号：US16017262

申请日：2018-06-25

Applicant: FANUC CORPORATION

Inventor： Kenichi Tsukada ,  Masatomo Shirouzu ,  Tomokazu Yoshida

IPC: H01F27/26 ,  H01F27/28 ,  H01F41/02

Abstract: A reactor includes an outer peripheral iron core composed of a plurality of outer peripheral iron core portions and at least three iron core coils arranged inside the outer peripheral iron core. The at least three iron core coils are composed of iron cores coupled to the plurality of outer peripheral iron core portions and coils wound onto the iron cores. Gaps, which can be magnetically coupled, are formed between adjacent iron cores. The reactor further includes connection parts for connecting the plurality of outer peripheral iron core portions to each other.

公开(公告)号：US20180366268A1

公开(公告)日：2018-12-20

申请号：US16003452

申请日：2018-06-08

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida ,  Masatomo Shirouzu ,  Kenichi Tsukada

IPC: H01F27/40 ,  H01F27/245 ,  H01F3/14 ,  H01F27/28

Abstract: A core body of a reactor includes an outer peripheral iron core composed of a plurality of outer peripheral iron core portions, at least 3 iron cores coupled to the outer peripheral iron core portions, and coils wound onto the at least three iron cores. Gaps are formed between one of the at least three iron cores and another iron core adjacent thereto. Further, the reactor includes a temperature detection part arranged in the center of one end surface of the core body.

公开(公告)号：US20180336984A1

公开(公告)日：2018-11-22

申请号：US15985036

申请日：2018-05-21

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida ,  Masatomo Shirouzu ,  Kenichi Tsukada

IPC: H01F3/14 ,  H01F27/38 ,  H01F27/26 ,  H01F27/30

CPC classification number: H01F3/14 ,  H01F27/263 ,  H01F27/306 ,  H01F27/38 ,  H01F37/00

Abstract: A reactor includes a core body. The core body includes an outer peripheral iron core composed of a plurality of outer peripheral iron core portions, at least three iron cores coupled to the plurality of outer peripheral iron core portions, and coils wound around the at least three iron cores. The reactor includes an end plate fastened to at least one end of the core body. The end plate includes a plurality of fasteners for fastening the plurality of outer peripheral iron core portions to each other.

公开(公告)号：US20180309402A1

公开(公告)日：2018-10-25

申请号：US15951710

申请日：2018-04-12

Applicant: Fanuc Corporation

Inventor： Tomokazu Yoshida

IPC: H02P27/06 ,  H02M5/458

CPC classification number: H02P27/06 ,  B60L3/003 ,  B60L2210/30 ,  B60L2210/40 ,  B60L2240/36 ,  H02M5/458 ,  H02M2001/322 ,  H02P2201/03

Abstract: A motor drive device includes a converter which converts an alternating current into a direct current and outputs the direct current to a DC link, a DC link capacitor, inverters, each of which is provided in correspondence with a motor, converts the direct current in the DC link into an alternating current, and outputs the alternating current to the corresponding motor, a temperature detection unit which detects the temperatures of the motors, an opening and closing unit which opens and closes an electrical path between the AC power supply and the converter, and a residual charge consumption control unit which controls at least one of the inverters to output a reactive current, in accordance with information concerning the motor temperatures detected by the temperature detection unit, when the opening and closing unit opens the electrical path to shut off AC input from the AC power supply to the converter.

公开(公告)号：US20180278052A1

公开(公告)日：2018-09-27

申请号：US15934196

申请日：2018-03-23

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida

IPC: H02H11/00 ,  H02P27/06 ,  H02P29/024 ,  H02P29/032 ,  H02H7/12

CPC classification number: H02H11/005 ,  H02H7/1213 ,  H02H7/1257 ,  H02P27/06 ,  H02P29/0241 ,  H02P29/025 ,  H02P29/032

Abstract: A converter apparatus includes: an AC/DC converter; a DC link capacitor connected to the converter; a voltage detection unit detecting the DC link voltage; a switching unit connecting or disconnecting between a power supply and the converter; a switching operation unit detecting an abnormality in a motor drive device including the converter apparatus and an inverter, and control the switching unit; a power supply monitoring unit detecting a voltage inputted to the converter to monitor a connection state between the power supply and the converter; a threshold value setting unit setting a threshold value to determine the presence or absence of a short circuit failure; and a short circuit failure detection unit determining that a short circuit failure has occurred, when the voltage of the DC link capacitor, immediately after the power supply is disconnected from the converter, is equal to or less than the threshold value.

公开(公告)号：US20160274172A1

公开(公告)日：2016-09-22

申请号：US15071476

申请日：2016-03-16

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida

IPC: G01R31/02 ,  H02P27/06 ,  H02P6/10

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.

Abstract translation: 电动机驱动装置包括：电压检测单元，用于检测每个直流电容器的电压; 电流检测单元，用于检测输入到每个逆变器或从每个逆变器输出的每个电流; 一个指令单元，用于在每个直流电容器充电之后向每个逆变器输出功率转换命令，并且切断向转换器提供直流电力; 电流积分单元，用于对输出功率转换命令时检测出的每个电流进行积分; 用于根据电流积分值计算每个直流电容器的估计容量的容量估计单元，以及在向转换器提供直流电力之后直流电容器的电压被切断，并且在电力转换指令 被输出 以及用于基于初始容量值和直流电容器的估计容量确定每个直流电容器的寿命的寿命确定单元。

公开(公告)号：US20160036269A1

公开(公告)日：2016-02-04

申请号：US14813256

申请日：2015-07-30

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida

IPC: H02J9/06

CPC classification number: H02J9/061

Abstract: An electric power converter includes a power failure detection circuit for detecting a power failure state of each power supply system, a first switch having contact points connected to the power supply systems and one output terminal and, when the power failure detection circuit detects a power failure in at least one power supply system, switches to connect to the output terminal of the contact point connected to one of the other power supply systems, a second switch having a charging circuit to inhibit an inrush current from the power supply systems and one input terminal connected to the output terminal of the first switch and switches to connect the input terminal to a contact point on an input side of the charging circuit for a predetermined duration in synchronization with the switching among the power supply systems by the first switch unit, and an electric power conversion circuit.

Abstract translation: 电力转换器包括用于检测每个电源系统的电源故障状态的电源故障检测电路，具有连接到电源系统和一个输出端子的接触点的第一开关，以及当电源故障检测电路检测到电源故障时 在至少一个电源系统中，切换到连接到其他电源系统中的一个的接触点的输出端子，第二开关具有充电电路，以抑制来自电源系统和一个输入端子的浪涌电流 连接到第一开关的输出端子，并与第一开关单元与电源系统之间的切换同步地切换，将输入端子连接到充电电路的输入侧的接触点一段预定的持续时间，以及 电力转换电路。