公开(公告)号：US20170097199A1

公开(公告)日：2017-04-06

申请号：US15279758

申请日：2016-09-29

Applicant: FANUC CORPORATION

Inventor： Kiichi Inaba ,  Shigeki Hanyu ,  Tomokazu Yoshida

IPC: F28F27/00 ,  F28F3/02 ,  G01N27/20 ,  F28F19/00

CPC classification number: F28F27/00 ,  F28F3/02 ,  F28F19/00 ,  F28F2250/08 ,  G01N27/20 ,  H01L23/34 ,  H01L23/36 ,  H01L23/467 ,  H05K7/20154 ,  H05K7/20181

Abstract: A cooling device includes an electrode unit which is arranged in a space between adjacent radiation fins and which is electrically insulated from the radiation fins, and a power supply source which applies a voltage between a heat radiation structure and the electrode unit. The cooling device is further provided with an insulation resistance detection unit which calculates an insulation resistance between the heat radiation structure and the electrode unit, and a comparison unit which compares the insulation resistance calculated by the insulation resistance detection unit with a predetermined threshold, wherein, as a result of the comparison of the calculated insulation resistance and the predetermined threshold by the comparison unit, when the calculated insulation resistance is lower than the predetermined threshold, the cooling device is adapted to judge that the radiation fins have clogged.

公开(公告)号：US11004590B2

公开(公告)日：2021-05-11

申请号：US16808593

申请日：2020-03-04

Applicant: Fanuc Corporation

Inventor： Tomokazu Yoshida ,  Masatomo Shirouzu ,  Kenichi Tsukada

IPC: H01F27/26 ,  H01F3/14 ,  H01F27/32 ,  H01F37/00

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 three iron cores coupled to the plurality of outer peripheral iron core portions, and coils wound onto the at least three iron cores. Gaps, which can be magnetically coupled, are formed between one of the at least three iron cores and another iron core adjacent thereto. The reactor includes cover parts which at least partially cover the iron cores and provide insulation from the coils.

公开(公告)号：US10658105B2

公开(公告)日：2020-05-19

申请号：US16003452

申请日：2018-06-08

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida ,  Masatomo Shirouzu ,  Kenichi Tsukada

IPC: H01F27/40 ,  H01F37/00 ,  H01F3/14 ,  H01F27/245 ,  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：US10650956B2

公开(公告)日：2020-05-12

申请号：US16000517

申请日：2018-06-05

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida ,  Masatomo Shirouzu ,  Kenichi Tsukada

IPC: H01F27/26 ,  H01F3/14 ,  H01F27/32 ,  H01F37/00

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 three iron cores coupled to the plurality of outer peripheral iron core portions, and coils wound onto the at least three iron cores. Gaps, which can be magnetically coupled, are formed between one of the at least three iron cores and another iron core adjacent thereto. The reactor includes cover parts which at least partially cover the iron cores and provide insulation from the coils.

公开(公告)号：US10320281B2

公开(公告)日：2019-06-11

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 ,  G01R31/00 ,  H02H9/00 ,  H02P7/00 ,  H02M1/00 ,  H02J7/34

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：US20190035529A1

公开(公告)日：2019-01-31

申请号：US16046334

申请日：2018-07-26

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida ,  Masatomo Shirouzu ,  Kenichi Tsukada

IPC: H01F27/02 ,  H01F27/29 ,  H01F27/24 ,  H01F27/40

CPC classification number: H01F27/02 ,  H01F27/24 ,  H01F27/29 ,  H01F27/40 ,  H01F37/00 ,  H01R9/24 ,  H01R13/447

Abstract: A reactor includes a core body having an outer peripheral iron core, at least three iron cores contacting or coupled to an internal surface of the outer peripheral iron core, and coils wound on the iron cores. The reactor has a terminal base including terminals connected to the coils and connected to cables through current-carrying portions, and an electrical shock protection cover for covering the terminal base. The electrical shock protection cover includes a main portion for covering the current-carrying portions, and cable covering portions extending from the main portion to cable drawing directions so as to cover a part of each cable. The terminal base includes a main portion for supporting the current-carrying portions, and cable receiving portions in which passages are formed to pass the cables therethrough between the cable receiving portion and the cable covering portion.

公开(公告)号：US20190013134A1

公开(公告)日：2019-01-10

申请号：US16018776

申请日：2018-06-26

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida ,  Masatomo Shirouzu ,  Kenichi Tsukada

IPC: H01F27/26 ,  H01F27/28

CPC classification number: H01F27/26 ,  H01F3/14 ,  H01F27/28 ,  H01F27/32 ,  H01F37/00

Abstract: A reactor according to an embodiment of the present disclosure includes a core body. The core body includes a peripheral iron core composed of a plurality of peripheral iron core portions, at least three iron cores coupled to the peripheral iron core portions, and coils wound on the iron cores. Gaps are formed between one of the iron cores and another iron core adjacent thereto, so as to be magnetically connectable through the gaps. The reactor further includes a plurality of covering portions each for covering each of the coils. The covering portions adjacent in a circumferential direction can be fitted to each other.

公开(公告)号：US20180366252A1

公开(公告)日：2018-12-20

申请号：US16000517

申请日：2018-06-05

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida ,  Masatomo Shirouzu ,  Kenichi Tsukada

IPC: H01F27/26 ,  H01F37/00 ,  H01F27/32 ,  H01F3/14

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 three iron cores coupled to the plurality of outer peripheral iron core portions, and coils wound onto the at least three iron cores. Gaps, which can be magnetically coupled, are formed between one of the at least three iron cores and another iron core adjacent thereto. The reactor includes cover parts which at least partially cover the iron cores and provide insulation from the coils.

公开(公告)号：US10148201B2

公开(公告)日：2018-12-04

申请号：US15890627

申请日：2018-02-07

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida

IPC: H02P3/14 ,  H02P3/18 ,  H02P27/06

Abstract: A motor drive device includes a forward converter, reverse converter, DC link capacitor, voltage detection part, first storage part storing a threshold for the non-energized period in which the leakage current of the capacitor increases and a threshold for the applied voltage for reducing the leakage current of the capacitor, a second storage part that records a previous energization period of the capacitor, and a control part, in which the control part obtains the non-energized period of the capacitor based on the previous energization period recorded, during activation of the motor drive device, and in a case of the non-energized period obtained being longer than the threshold for the non-energized period stored, causes regeneration operation from the motor to the power supply to stop, and causes the voltage of the capacitor to rise up to the threshold for the applied voltage stored, by way of deceleration energy of the motor.

公开(公告)号：US20180316275A1

公开(公告)日：2018-11-01

申请号：US15963793

申请日：2018-04-26

Applicant: FANUC CORPORATION

Inventor： Tomokazu Yoshida

IPC: H02M7/217 ,  H02M1/00

CPC classification number: H02M7/217 ,  H02H7/1257 ,  H02M1/00 ,  H02M7/125 ,  H02M2001/0009 ,  H02M2001/0025

Abstract: A convertor apparatus includes: a main circuit unit which converts an alternating current to a direct current and outputs the same to a DC link; a DC link capacitor; an alternating current voltage detection unit which detects an alternating current voltage crest value of the main circuit unit; a DC link capacitor voltage detection unit which detects a DC link capacitor voltage value; an initial charging unit which includes a switch for opening and closing an electrical path between the main circuit unit and the DC link capacitor and a charging resistor; a current detection unit which detects a current value flowing into the main circuit unit or flowing out of the main circuit unit; and a voltage reference value setting unit which sets the voltage reference value in accordance with the current value when the switch is adapted from to be opened into to be closed.