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公开(公告)号：US20210175818A1
公开(公告)日：2021-06-10
申请号：US17114704
申请日：2020-12-08
Applicant: Fanuc Corporation
Inventor： Eijun Murai , Shunpei Tanaka , Shinichi Horikoshi
Abstract: The rectifier includes: a main circuit unit configured to perform power conversion between AC power on a side of a three-phase AC power supply and DC power on a DC side by rectifying operation of a rectifying device and ON-OFF operation of a switching device; a power calculation unit configured to calculate a value of a power flowing between the side of the three-phase AC power supply and the DC side via the main circuit unit; and a control unit configured to perform control to execute the ON-OFF operation of the switching device, wherein the control unit changes a length of an ON period per cycle in the ON-OFF operation executed on the switching device according to the value of the power calculated by the power calculation unit.
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2.发明授权公开(公告)号：US10651758B2
公开(公告)日：2020-05-12
申请号：US16262914
申请日：2019-01-31
Applicant: FANUC CORPORATION
Inventor： Shinichi Horikoshi , Yuuya Nakagawa
Abstract: A motor drive apparatus includes a PWM converter configured to convert AC power of an AC power supply into DC power, a DC link unit including capacitors provided on the DC output side of the PWM converter and connected in series with each other, an inverter configured to convert the DC power of the DC link unit into AC power for driving a motor and output the AC power, a DC link voltage detection unit, a power supply voltage detection unit, a short-circuit judgment unit configured to judge that at least one of the capacitors has shorted when the DC link voltage value is smaller than the peak value of the power supply voltage, and a shut-off unit configured to shut off flow of AC power from the AC power supply into the PWM converter when the short-circuit judgment unit judges that at least one of the capacitors has shorted.
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公开(公告)号：US09071182B2
公开(公告)日：2015-06-30
申请号：US14020280
申请日：2013-09-06
Applicant: FANUC CORPORATION
Inventor： Tomokazu Yoshida , Shinichi Horikoshi
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：US11005409B2
公开(公告)日：2021-05-11
申请号：US16408846
申请日：2019-05-10
Applicant: Fanuc Corporation
Inventor： Akinori Satou , Shinichi Horikoshi
IPC: H02P29/024 , H02P27/06
Abstract: A motor drive apparatus includes a converter which converts AC power into DC power and outputs it to a DC link, an inverter which converts the DC power of the DC link into AC power for driving a motor, DC link capacitors connected in series with each other, resistors connected in parallel with the DC link capacitors and connected in series with each other, a DC link voltage detection unit, a current-carrying element which is connected between one of connection points connecting the DC link capacitors to each other and one of connection points connecting the resistors to each other, and carries a current when the applied voltage is higher than a predetermined value, and a short-circuit judgment unit which judges that at least one of the DC link capacitors has shorted when the DC link voltage value is larger than an upper limit or smaller than a lower limit.
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公开(公告)号：US10298141B2
公开(公告)日：2019-05-21
申请号：US15896317
申请日：2018-02-14
Applicant: FANUC CORPORATION
Inventor： Shinichi Horikoshi , Yuuya Nakagawa
Abstract: A motor drive device that inputs AC power from a power supply to drive a motor includes: a converter that converts the AC power from the power supply into DC power; a DC/DC converter that generates DC power produced by stepping-up, stepping-down, or stepping-up and stepping-down the DC power from the converter; an inverter that converts the DC power from the DC/DC converter into AC power and supplies to the motor; and an electrical storage capacitor that is provided between the DC/DC converter and the inverter.
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Patent Agency Ranking
公开(公告)号：US20240162704A1
公开(公告)日：2024-05-16
申请号：US18283891
申请日：2021-04-02
Applicant: Fanuc Corporation
Inventor： Hiroki Sugiura , Shinichi Horikoshi , Koujirou Sakai
IPC: H02H9/00 , H02H9/02 , H02M1/00 , H02M7/5387
CPC classification number: H02H9/002 , H02H9/02 , H02M1/0077 , H02M7/53871
Abstract: This inrush current suppression circuit, which suppresses inrush current during pre-charging of a capacitor connected in parallel to the DC-output side of a converter that converts AC power supply voltage to DC voltage, includes: a resistor that is provided between the DC-output side of the converter and the capacitor, or that is provided on the AC-input side of the converter; a switch that is selectively switched between an open state, in which an electric circuit is formed with the resistor interposed, and a closed state, in which a short circuit is formed without the resistor interposed; an AC power supply voltage detection unit that detects whether the AC power supply voltage is inputted to the converter; and a switch control unit that switches the switch from the open state to the closed state after a prescribed time has elapsed from when the AC power supply voltage detection unit detects inputting of the AC power supply voltage to the converter.
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公开(公告)号：US11171573B2
公开(公告)日：2021-11-09
申请号：US16925155
申请日：2020-07-09
Applicant: FANUC CORPORATION
Inventor： Shinichi Horikoshi , Koujirou Sakai
Abstract: A power conversion apparatus includes: a converter converting AC voltage supplied from an AC power supply via a switch unit, into DC voltage; a smoothing capacitor smoothing the DC voltage output from the converter; a resistor suppressing electric current flowing into the smoothing capacitor; a switch short-circuiting the both ends of the resistor; a filter including reactors and capacitors and that removes noise; and a control unit controlling opening and closing of the switch unit and the switch. The control unit changes the switch unit from the open state to the closed state with the switch in an open state if the voltage across the smoothing capacitor is lower than a voltage threshold, and changes the switch unit from the open state to the closed state with the switch in an closed state if the voltage across the smoothing capacitor is equal to or greater than the voltage threshold.
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公开(公告)号：US11146182B2
公开(公告)日：2021-10-12
申请号：US16887042
申请日：2020-05-29
Applicant: FANUC CORPORATION
Inventor： Takaaki Tagawa , Shinichi Horikoshi
IPC: H02M7/5387 , H02M7/12 , H02P27/06 , H02M1/36 , H02M1/32
Abstract: A rectifier according to an aspect of the present disclosure includes: a bridge circuit that derives a positive voltage component and a negative voltage component from an AC power supply voltage; a smoothing capacitor that smooths an output voltage from the bridge circuit; a pre-charge resistor that is provided between the bridge circuit and the smoothing capacitor, and reduces an inrush current; a charge switch that is provided in parallel with the pre-charge resistor; and a controller that controls the charge switch between an open state and a close state, wherein when application of the AC power supply voltage to the bridge circuit is started, the controller closes the charge switch if a voltage applied between ends of the pre-charge resistor is determined to become equal to or lower than a predetermined resistor threshold voltage.
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公开(公告)号：US10709037B2
公开(公告)日：2020-07-07
申请号：US16180362
申请日：2018-11-05
Applicant: FANUC CORPORATION
Inventor： Kazuhiro Yamamoto , Makoto Takeshita , Shinichi Horikoshi
Abstract: A motor drive device capable of attaching a fan unit to a mounting member more easily. The motor drive device includes the mounting member formed with a mounting hole, the fan unit including a lid positioned facing the mounting member to cover the mounting hole and being fixed to the mounting member, and a restricting member movably attached to the lid, the restricting member being movable between a restriction position for engaging with the mounting member and a non-restriction position for releasing from the mounting member.
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10.发明申请公开(公告)号：US20190312542A1
公开(公告)日：2019-10-10
申请号：US16372981
申请日：2019-04-02
Applicant: FANUC CORPORATION
Inventor： Takaaki Tagawa , Shinichi Horikoshi
IPC: H02P29/68
Abstract: A motor driving device includes a heat sink, a rectifier provided on the heat sink and configured to rectify an AC voltage supplied from an AC power supply to a DC voltage, a charging resistor provided on the heat sink and configured to be used for charging a smoothing capacitor for smoothing the DC voltage rectified by the rectifier, and a temperature sensor with which the charging resistor is provided.
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