公开(公告)号：US20180311640A1

公开(公告)日：2018-11-01

申请号：US15957327

申请日：2018-04-19

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida ,  Masatomo Shirouzu ,  Kenichi Tsukada

IPC: B01J19/24 ,  B01J19/08

Abstract: A reactor includes a core body and an end plate fastened to at least one end of the core body. The end plate is formed from a plurality of end plate parts.

公开(公告)号：US10075120B2

公开(公告)日：2018-09-11

申请号：US15843772

申请日：2017-12-15

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida

IPC: H02P6/34 ,  H02P21/16 ,  H02H3/52 ,  H02P27/06

CPC classification number: H02P27/06 ,  H02P27/08

Abstract: A motor drive device includes: reverse converter that converts DC power from a forward converter into AC power; a DC link capacitor provided in a DC link; a first current detection part that detects current flowing between the forward converter and capacitor; a second current detection part that detects current flowing between the capacitor and reverse converter; a voltage detection part that detects a voltage of the capacitor; and a capacitance decline detection part that obtains a change value in electric charge of the capacitor from a n integrated value by integrated a predetermined time of a difference in current values detected by the current detection parts, obtains a capacitance value of the capacitor based on the obtained change amount in electric charge and change amount in voltage of the capacitor for the predetermined time, and detects a capacitance decline in the capacitor based on the obtained capacitance value.

公开(公告)号：US20160380571A1

公开(公告)日：2016-12-29

申请号：US15183881

申请日：2016-06-16

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida

IPC: H02P27/06 ,  H02M5/42

CPC classification number: H02H7/1216 ,  H02M7/062 ,  H02P2201/03

Abstract: A motor driving device includes: a converter that converts AC power into DC power; a DC link capacitor provided for the DC link; an inverter that converts DC power into AC power for a motor; an initial charging circuit that charges the DC link capacitor; a potential difference determination unit that determines a potential difference between both ends of the initial charging circuit; a direct current detecting unit that detects direct current supplied to the initial charging circuit; an alternating current detecting unit that detects alternating current supplied to a motor; and an abnormality determination unit that determines that abnormal heat generation occurs in the initial charging circuit when the alternating current detecting unit detects alternating current and the direct current detecting unit detects direct current, in a case in which a potential difference occurs between both of the ends of the initial charging circuit.

Abstract translation: 电动机驱动装置包括：将交流电转换为直流电力的转换器; 为DC链路提供的DC链路电容器; 将直流电力转换为电动机的交流电源的逆变器; 初始充电电路，对直流链路电容器充电; 电位差确定单元，确定初始充电电路的两端之间的电位差; 直流电流检测单元，其检测提供给初始充电电路的直流电流; 交流电流检测单元，其检测供应给电动机的交流电; 以及异常判定单元，在所述交流电流检测单元检测到交流电流并且所述直流电流检测单元检测到直流电流的情况下，判断在所述初始充电电路中发生异常发热的情况， 的初始充电电路。

公开(公告)号：US20160266189A1

公开(公告)日：2016-09-15

申请号：US15063926

申请日：2016-03-08

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida

IPC: G01R31/02

CPC classification number: G01R31/028

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.

Abstract translation: 用于直流电容器的寿命确定装置包括：电流检测单元，其检测从整流器输出的电流; 电压检测单元，其检测所述直流电容器的电压; 初始充电装置，利用从整流器输出的电流，对直流电容器进行初始充电至预定的电压值; 电流积分单元，其在初始充电期间对由电流检测单元检测出的电流进行积分; 电容估计单元，其从初始充电之前的直流电容器的电流积分值，预定电压值和电压计算直流电容器的估计电容值; 以及寿命确定单元，其基于未使用状态下的直流电容器的初始电容值和所估计的电容来确定直流电容器是否处于其使用寿命结束。

公开(公告)号：US10937587B2

公开(公告)日：2021-03-02

申请号：US16851303

申请日：2020-04-17

Applicant: FANUC CORPORATION

Inventor： Kenichi Tsukada ,  Masatomo Shirouzu ,  Tomokazu Yoshida

IPC: H01F27/26 ,  H01F41/02 ,  H01F27/28 ,  H01F3/14 ,  H01F27/30 ,  H01F37/00 ,  H01F27/38 ,  H01F27/24 ,  H01F27/245

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：US10784037B2

公开(公告)日：2020-09-22

申请号：US16031063

申请日：2018-07-10

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida ,  Masatomo Shirouzu ,  Kenichi Tsukada

IPC: H01F27/24 ,  H01F27/28 ,  H01F27/29 ,  H01F41/02 ,  H01F41/04 ,  H01F27/40 ,  H01F37/00 ,  H01F3/14

Abstract: A reactor according to an embodiment of the present disclosure includes a core body that includes an outer peripheral iron core composed of a plurality of outer peripheral iron core portions, at least three iron cores coupled to the outer peripheral iron core portions, and coils wound on the iron cores. A gap is formed between one of the iron cores and another of the iron cores adjacent to the one of the iron cores, so as to be magnetically connectable through the gap. The reactor includes a terminal base unit for electrically connecting the coils to an external device, and a temperature sensor attached to a surface of the terminal base unit, the surface being opposite the coils.

公开(公告)号：US20200294704A1

公开(公告)日：2020-09-17

申请号：US16811352

申请日：2020-03-06

Applicant: Fanuc Corporation

Inventor： Tomokazu Yoshida ,  Masatomo Shirouzu ,  Kenichi Tsukada

IPC: H01F27/26

Abstract: A reactor includes a core body, and the core body includes an outer peripheral iron core, at least three iron cores in contact with an inner surface of the outer peripheral iron core, or positioned to be coupled to the inner surface, and coils wound around the iron cores. A gap through which magnetic coupling is possible is formed between one iron core of the at least three iron cores and another iron core adjacent to the one iron core. The reactor includes an end plate attached to one end face of the core body, and the end plate includes a protruding portion that partially protrudes in a direction away from an outer circumferential surface of the core body.

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：US10685774B2

公开(公告)日：2020-06-16

申请号：US16039332

申请日：2018-07-19

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida ,  Masatomo Shirouzu ,  Kenichi Tsukada

IPC: H01F30/12 ,  H01F27/28 ,  H01F27/02 ,  H01F27/24 ,  H01F3/14 ,  H01F37/00 ,  H01F27/29

Abstract: A core body of a reactor include an outer peripheral iron core, at least three iron cores arranged in contact with or coupled to an inner surface of the outer peripheral iron core, and at least three coils wound onto the at least three iron cores. Gaps, which can be magnetically coupled, are formed between the at least three iron cores. The reactor further includes a protection part which at least partially protects projection portions of the at least three coils which project from at least one end surface of the core body.

公开(公告)号：US20200075205A1

公开(公告)日：2020-03-05

申请号：US16550652

申请日：2019-08-26

Applicant: FANUC CORPORATION

Inventor： Kenichi Tsukada ,  Tomokazu Yoshida ,  Masatomo Shirouzu

IPC: H01F3/14 ,  H01F27/30

Abstract: A reactor includes an outer peripheral iron core, at least three leg part iron cores arrayed on an inner surface side thereof, each of which is composed of a laminate of a plurality of electromagnetic steel sheets, and coils wound on the respective leg part iron cores, wherein each of the at least three leg part iron cores is arranged so that one end thereof in the direction of a winding axis of the coil is magnetically connected to the outer peripheral iron core and the other end in the direction of the winding axis is magnetically connected to the other end of another of the at least three leg part iron cores via a gap, and at least one of the leg part iron cores includes a weld part for welding at least a part of the plurality of electromagnetic steel sheets in the lamination direction.