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公开(公告)号：US10090794B2
公开(公告)日：2018-10-02
申请号：US15724552
申请日：2017-10-04
Applicant: FANUC CORPORATION
Inventor： Tomokazu Yoshida
IPC: H02P27/04 , H02P29/024 , H02M7/00 , 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.
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公开(公告)号：US09874416B2
公开(公告)日：2018-01-23
申请号：US15279758
申请日：2016-09-29
Applicant: FANUC CORPORATION
Inventor： Kiichi Inaba , Shigeki Hanyu , Tomokazu Yoshida
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.
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23.发明授权公开(公告)号：US09653947B2
公开(公告)日：2017-05-16
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.
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公开(公告)号：US20160149531A1
公开(公告)日：2016-05-26
申请号：US14942033
申请日：2015-11-16
Applicant: FANUC CORPORATION
Inventor： Tomokazu Yoshida
IPC: H02P29/02
CPC classification number: H02P29/0241 , H02H7/08 , H02H11/005 , H02H11/006
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.
Abstract translation: 马达驱动器包括用于监视驱动条件的条件检测电路，用于确定检测到的数据是否指示异常的确定电路，用于存储包括施加到驱动器的峰值电压中的至少一个的检测值的存储单元， 流过驱动器的峰值电流，异常发生的累积次数，以及异常发生时的峰值电压或电流随时间的变化;以及设定单元，用于预先设定包括容许峰值电压和电流的设定值，以及 允许的异常发生次数，以及驱动器允许的时间峰值电压和电流的允许变化。 每当电动机驱动器通电时，确定检测值是否达到设定值。 当检测值达到设定值时，电机驱动器的通电被禁止。
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公开(公告)号：US11776728B2
公开(公告)日：2023-10-03
申请号：US16923538
申请日：2020-07-08
Applicant: Fanuc Corporation
Inventor： Tomokazu Yoshida
Abstract: A reactor includes an outer peripheral iron core, at least three iron cores, and a coil wound around the iron core. The reactor further includes an energizing portion connected to the coil and configured to be connected to a cable, and a cover provided to cover the energizing portion. At least one cutout formed in the cover is provided with at least one adjustment member configured to adjust an area of the cutout at least partially in the cover. The adjustment member is configured to be cut away from the cutout or to be bent with respect to a surface where the cutout is formed.
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Patent Agency Ranking
公开(公告)号：US11600424B2
公开(公告)日：2023-03-07
申请号：US16908889
申请日：2020-06-23
Applicant: Fanuc Corporation
Inventor： Tomokazu Yoshida
Abstract: A core main body includes an outer peripheral iron core, and at least three iron cores. Between the two iron cores adjacent to each other, a gap being magnetically couplable is formed. The outer peripheral iron core includes a first outer peripheral iron core block and a second outer peripheral iron core block that are formed by stacking a plurality of magnetic plates, and an intermediate plate disposed therebetween. The intermediate plate includes an outer peripheral iron core corresponding portion corresponding to the outer peripheral iron core, a plurality of protruding sections protruding from an outer peripheral surface of the outer peripheral iron core, and engaging sections provided on the plurality of protruding sections.
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公开(公告)号：US11128252B2
公开(公告)日：2021-09-21
申请号：US15875339
申请日：2018-01-19
Applicant: FANUC CORPORATION
Inventor： Tomokazu Yoshida
IPC: H02P29/024 , H02P27/06 , H02M1/32 , H02M5/453 , H02M5/42
Abstract: A motor drive device has an abnormality detection function for a power supply unit between its own device and a power supply, and includes: a forward converter that is inputted AC power from the power supply via the power supply input part, and converts the AC power into DC power; a reverse converter that converts the DC power from the forward converter into AC power; a DC link capacitor provided to a DC link between the forward converter and the reverse converter; a voltage detection part that detects voltage of the DC link capacitor; and an abnormality detection part that obtains a voltage change amount for a predetermined time of the DC link capacitor based on voltage values detected by the voltage detection part, and performs abnormality detection on the power supply input part based on the voltage change amount thus obtained.
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公开(公告)号：US10790082B2
公开(公告)日：2020-09-29
申请号：US16038221
申请日：2018-07-18
Applicant: FANUC CORPORATION
Inventor： Tomokazu Yoshida , Masatomo Shirouzu , Kenichi Tsukada
Abstract: A reactor according to an embodiment of the present disclosure includes a reactor main body including cores and coils wound on the cores; and a base having a polygonal shape extending outside the reactor main body, configured to support the reactor main body. In at least two sides that are not opposite each other, of a plurality of sides of the base, a plurality of notches are formed inwardly from each of the sides, so that axes of fasteners to temporarily secure the base to an installation target object pass through the notches.
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公开(公告)号：US20200243245A1
公开(公告)日：2020-07-30
申请号：US16851303
申请日：2020-04-17
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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30.发明授权公开(公告)号：US10702848B2
公开(公告)日：2020-07-07
申请号：US15957327
申请日：2018-04-19
Applicant: FANUC CORPORATION
Inventor： Tomokazu Yoshida , Masatomo Shirouzu , Kenichi Tsukada
Abstract: A reactor includes a core body having an outer peripheral iron core. A least three iron cores are in contact with or connected to an inner surface of the outer peripheral iron core, and coils are wound onto the at least three iron cores. Gaps are formed between two adjacent iron cores from among the at least three iron cores or between the at least three iron cores and a central iron core disposed at the center of the core body, through which gaps the iron cores are magnetically connectable. The reactor also includes an end plate fastened to at least one end of the core body such that the end plate is shaped to correspond to the outer peripheral iron core. The end plate is formed from a plurality of end plate parts.
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