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公开(公告)号：US20180212549A1
公开(公告)日：2018-07-26
申请号：US15875339
申请日：2018-01-19
Applicant: FANUC CORPORATION
Inventor： Tomokazu YOSHIDA
IPC: H02P29/024 , H02P27/06
CPC classification number: H02P29/025 , H02M1/32 , H02M5/42 , H02M5/453 , H02P27/06 , H02P2201/03
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：US20170302213A1
公开(公告)日：2017-10-19
申请号：US15479469
申请日：2017-04-05
Applicant: FANUC CORPORATION
Inventor： Tomokazu YOSHIDA , Kiichi INABA , Shigeki HANYUU
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.
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公开(公告)号：US20190035537A1
公开(公告)日：2019-01-31
申请号：US16038221
申请日：2018-07-18
Applicant: FANUC CORPORATION
Inventor： Tomokazu YOSHIDA , Masatomo SHIROUZU , Kenichi TSUKADA
CPC classification number: H01F27/306 , H01F27/06 , H01F27/263 , H01F37/00 , H02K3/32 , H02K3/46
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：US20190035531A1
公开(公告)日：2019-01-31
申请号：US16039332
申请日：2018-07-19
Applicant: FANUC CORPORATION
Inventor： Tomokazu YOSHIDA , Masatomo SHIROUZU , Kenichi TSUKADA
CPC classification number: H01F27/28 , H01F3/14 , H01F27/02 , H01F27/24 , H01F27/2852 , H01F27/29 , H01F37/00
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.
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公开(公告)号：US20240258022A1
公开(公告)日：2024-08-01
申请号：US18560491
申请日：2021-05-20
Applicant: FANUC CORPORATION
Inventor： Tomokazu YOSHIDA
CPC classification number: H01F27/306 , H01F27/266 , H01F27/325
Abstract: The present invention prevents a coil case from being mispositioned in the radial direction of a coil body. A core body (5) of an electromagnetic device (6) includes an outer peripheral iron core (20) and at least three iron cores (41 to 44). The electromagnetic device further includes coils (51 to 54) mounted to the iron cores and coil cases (61 to 64). Fitting parts (70 and 80) for fitting the core body and the coil cases to each other are formed on the core body and each of the coil cases.
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Patent Agency Ranking
公开(公告)号：US20190035539A1
公开(公告)日：2019-01-31
申请号：US16038200
申请日：2018-07-18
Applicant: FANUC CORPORATION
Inventor： Tomokazu YOSHIDA , Masatomo SHIROUZU , Kenichi TSUKADA
IPC: H01F27/33 , H01F27/245 , H01F27/28
Abstract: A reactor includes a core body having at least three iron cores composed of a plurality of stacked magnetic plates and an end plate and a pedestal which are connected to the core body so as to interpose the core body therebetween. Gaps are formed between the at least three iron cores, through which magnetic connection can be established. An unevenness absorbing member is arranged at least one of a region between an end plate and the core body and a region between the core body and a pedestal, for absorbing unevenness in heights of the at least three iron cores in the axial direction of the core body.
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公开(公告)号：US20190035530A1
公开(公告)日：2019-01-31
申请号：US16040547
申请日：2018-07-20
Applicant: FANUC CORPORATION
Inventor： Tomokazu YOSHIDA , Masatomo SHIROUZU , Kenichi TSUKADA
Abstract: A reactor includes a core body having at least three iron cores, an end plate and a pedestal fastened to the core body so as to interpose the core body therebetween, and a plurality of shaft parts which support the core body between the end plate and the pedestal in the vicinity of an outer edge of the core body. Gaps, which can be magnetically coupled, are formed between the at least three iron cores. At least one of the plurality of shaft parts is used as a ground wiring terminal on an upper surface of the end plate.
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公开(公告)号：US20180234035A1
公开(公告)日：2018-08-16
申请号：US15890627
申请日：2018-02-07
Applicant: FANUC CORPORATION
Inventor： Tomokazu YOSHIDA
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.
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公开(公告)号：US20140070743A1
公开(公告)日：2014-03-13
申请号：US14020280
申请日：2013-09-06
Applicant: FANUC CORPORATION
Inventor： Tomokazu YOSHIDA , Shinichi HORIKOSHI
IPC: H02P6/24
CPC classification number: H02P6/24 , H02H7/10 , H02P29/024 , H02P29/0241
Abstract: A motor drive device includes a converter which mutually converts power between AC power and DC power, an inverter which converts the DC power into AC power for driving a motor to output to a motor side, and converts regenerated AC power from the motor side into DC power to output to the DC side, a DC link unit which connects a DC side of the converter and a DC side of the inverter, a voltage detecting unit which detects a DC voltage value, an alarm level setting unit which sets an alarm level of the DC voltage value, an alarm determining unit which determines whether or not the DC voltage value exceeds the alarm level, and an alarm reporting unit which instructs the inverter to stop conversion operation when it is determined that the voltage value exceeds the alarm level.
Abstract translation: 一种电动机驱动装置，具备：交流电力与直流电力之间相互转换电力的转换器，将直流电力转换为交流电力以驱动电动机输出到电动机侧的逆变器，将从电动机侧的再生交流电力变换为直流 输出到DC侧的功率，连接转换器的直流侧的直流侧单元和逆变器的直流侧的直流侧单元，检测直流电压值的电压检测单元，设定报警水平的报警水平设定单元 直流电压值，确定直流电压值是否超过警报水平的报警确定单元，以及当确定电压值超过警报水平时，指示逆变器停止转换操作的报警报告单元。
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公开(公告)号：US20180175775A1
公开(公告)日：2018-06-21
申请号：US15843772
申请日：2017-12-15
Applicant: FANUC CORPORATION
Inventor： Tomokazu YOSHIDA
IPC: H02P27/06
CPC classification number: H02P27/06
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.
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