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公开(公告)号：US11587723B2
公开(公告)日：2023-02-21
申请号：US16596082
申请日：2019-10-08
Applicant: FANUC CORPORATION
Inventor： Tomokazu Yoshida , Masatomo Shirouzu , Kenichi Tsukada
Abstract: A reactor includes: an outer peripheral iron core; three leg iron cores; and three coils, each of the coils having an input side coil end and an output side coil end projecting from a same end surface on an end side in the axial direction of the three leg iron cores, where the three coils include two first coils in which a projecting position of the input side coil end and a projecting position of the output side coil end has a first relative positional relationship and include one second coil having a second relative positional relationship opposite to the first relative positional relationship and where winding directions from the input side coil end to the output side coil end of the first and the second coils are reversed to each other.
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公开(公告)号：US11521783B2
公开(公告)日：2022-12-06
申请号：US16838358
申请日：2020-04-02
Applicant: Fanuc Corporation
Inventor： Kenichi Tsukada , Tomokazu Yoshida
Abstract: Provided is a reactor having a core main body that includes an outer peripheral iron core, at least three iron cores, and coils. Between the iron cores adjacent to each other, a gap being magnetically coupled is formed. The reactor includes a fixture that fixes both end portions of the at least three iron cores together by passing through an interior of the outer peripheral iron core in a region between the outer peripheral iron core and the gap. The fixture includes plate-like members disposed on both end faces of the core main body and includes rod-like members that connect the plate-like members to each other by passing through the interior of the outer peripheral iron core. The plate-like members each include a protrusion extending axially inward of the core main body.
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公开(公告)号：US10818423B2
公开(公告)日：2020-10-27
申请号：US16018776
申请日：2018-06-26
Applicant: FANUC CORPORATION
Inventor： Tomokazu Yoshida , Masatomo Shirouzu , Kenichi Tsukada
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.
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公开(公告)号：US10714248B2
公开(公告)日：2020-07-14
申请号：US15985036
申请日：2018-05-21
Applicant: FANUC CORPORATION
Inventor： Tomokazu Yoshida , Masatomo Shirouzu , Kenichi Tsukada
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.
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公开(公告)号：US10699838B2
公开(公告)日：2020-06-30
申请号：US16017262
申请日：2018-06-25
Applicant: FANUC CORPORATION
Inventor： Kenichi Tsukada , Masatomo Shirouzu , Tomokazu Yoshida
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.
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Patent Agency Ranking
公开(公告)号：US10516344B2
公开(公告)日：2019-12-24
申请号：US15963793
申请日：2018-04-26
Applicant: FANUC CORPORATION
Inventor： Tomokazu Yoshida
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.
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公开(公告)号：US10438733B2
公开(公告)日：2019-10-08
申请号：US16046334
申请日：2018-07-26
Applicant: FANUC CORPORATION
Inventor： Tomokazu Yoshida , Masatomo Shirouzu , Kenichi Tsukada
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.
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公开(公告)号：US20190013139A1
公开(公告)日：2019-01-10
申请号：US16018661
申请日：2018-06-26
Applicant: FANUC CORPORATION
Inventor： Masatomo Shirouzu , Kenichi Tsukada , Tomokazu Yoshida
Abstract: A reactor includes an outer peripheral iron core and at least three iron core coils arranged inside the outer peripheral iron core. Gaps, which can be magnetically coupled, are formed between at least three adjacent iron cores. Coils are arranged in coil spaces formed between the iron cores and the outer peripheral iron core. At least one corner part in the cross-section of the coil spaces in the axial direction is rounded, or the at least one corner part is one part of a polygon having an internal obtuse angle of not less than 100°.
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公开(公告)号：US20180358165A1
公开(公告)日：2018-12-13
申请号：US16000484
申请日：2018-06-05
Applicant: FANUC CORPORATION
Inventor： Tomokazu Yoshida , Masatomo Shirouzu , Kenichi Tsukada
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. The reactor includes a terminal and base which are fastened to the core body so as to interpose the core body therebetween, a first abutment member attached to the base and is configured to abut one end of the at least three iron cores between the base and the core body, and a second abutment member attached to the terminal and is configured to abut the other end of the at least three iron cores between the core body and the terminal.
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公开(公告)号：US09787084B2
公开(公告)日：2017-10-10
申请号：US15183881
申请日：2016-06-16
Applicant: FANUC CORPORATION
Inventor： Tomokazu Yoshida
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.
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