公开(公告)号：US11211887B2

公开(公告)日：2021-12-28

申请号：US16860110

申请日：2020-04-28

申请人： FANUC CORPORATION

发明人： Daisuke Tajima ,  Yuuki Morita ,  Tadashi Okita

IPC分类号： H02K7/14 ,  H02P21/22 ,  B23Q15/12

摘要： A motor control device according to an aspect of the present disclosure controls a motor by switching between speed control and position control, and sets a maximum voltage applied to the motor during the position control to lower than a maximum voltage applied to the motor during the speed control.

公开(公告)号：US11003162B2

公开(公告)日：2021-05-11

申请号：US16197812

申请日：2018-11-21

申请人： FANUC CORPORATION

发明人： Kazuyuki Sugiyama ,  Junichi Tezuka ,  Tadashi Okita

IPC分类号： G05B19/4065

摘要： A data collection device capable of reducing the load of a data collection process and network communication by monitoring trigger at a plurality of cycles is provided. The data collection device includes a control unit, and the control unit includes: an event monitoring unit that acquires first trigger information from the machine tool at a first cycle and monitors whether a starting condition and an ending condition for acquisition of the data have been established on the basis of the first trigger information; a sampling control unit that instructs the machine tool to sample the data at a second cycle shorter than the first cycle when the starting condition is established and instructs the machine tool to end the sampling when the ending condition is established; and a data acquisition unit that acquires the data sampled by the machine tool from the machine tool together with second trigger information.

公开(公告)号：US10928452B2

公开(公告)日：2021-02-23

申请号：US16271595

申请日：2019-02-08

申请人： FANUC CORPORATION

发明人： Kouki Oikawa ,  Yuuki Morita ,  Tadashi Okita

IPC分类号： G01R31/34

摘要： To simplify determination of drive parameters upon driving a motor for which circuit constants are unknown, and shorten the time required in determination. A parameter determination support device includes: an automatic measurement part which automatically measures acceleration (rpm/s) of the synchronous motor and D-phase current (A) of the motor drive device, as operating information upon driving while accelerating the synchronous motor under each condition of a first condition based on a base speed, and a second condition in which the D-phase current (A) of the motor drive device was changed from the first condition, according to the test-run program, by applying the initial parameter; an estimation part which estimates an inductance ratio (dimensionless) and a Q-phase inductance (mH), as circuit constants of the synchronous motor, based on the operating information; and a calculation part for performing calculation of an optimum parameter tailored to the output specification of the synchronous motor, based on the circuit constants.

公开(公告)号：US10444727B2

公开(公告)日：2019-10-15

申请号：US15914521

申请日：2018-03-07

申请人： FANUC CORPORATION

发明人： Kouki Oikawa ,  Yuuki Morita ,  Tadashi Okita

IPC分类号： G05B19/18 ,  G05B19/41 ,  H02P21/12 ,  H02P21/26

摘要： An object is to provide the numerical control device of a machine tool which can achieve both a reduction in heat generation and stability in heavy cutting. A numerical control device includes a command transmission portion which transmits a speed command value and a magnetic flux command value to the spindle control portion of a machine tool and a storage portion which stores magnetic flux amounts corresponding to tools that may be used in the machine tool. The numerical control device also includes a tool detection portion which detects a tool selected in the machine tool and a magnetic flux amount setting portion which commands the command transmission portion to read, from the storage portion, a magnetic flux amount corresponding to the tool detected by the tool detection portion and to output the magnetic flux amount to the spindle control portion of the machine tool.

公开(公告)号：US10248102B2

公开(公告)日：2019-04-02

申请号：US15895428

申请日：2018-02-13

申请人： FANUC CORPORATION

发明人： Kouki Oikawa ,  Yuuki Morita ,  Tadashi Okita

IPC分类号： G05B19/29 ,  G05B19/19 ,  H02P23/20 ,  H02P5/50

摘要： A numerical controller for controlling a machine tool including a spindle motor formed of an induction motor includes: a storage unit that stores a maximum acceleration at which the spindle motor can operate when a magnetic flux amount of the spindle motor reaches its maximum; a magnetic flux amount acquisition unit that acquires a present magnetic flux amount of the spindle motor; and an acceleration change unit that changes an acceleration of a position command based on a maximum acceleration of the spindle motor stored in the storage unit according to a magnetic flux amount at the start of movement of the spindle motor acquired by the magnetic flux amount acquisition unit when the spindle motor is operated by position control using a position command.

公开(公告)号：US20180375458A1

公开(公告)日：2018-12-27

申请号：US16010953

申请日：2018-06-18

申请人： FANUC CORPORATION

发明人： Yuuki Morita ,  Kenji Takahashi ,  Tadashi Okita

IPC分类号： H02P29/024 ,  H02P29/032

CPC分类号： H02P29/026 ,  H02P29/032

摘要： An anomaly diagnosing device diagnoses an anomaly in a single motor driven by multiple motor drive units. The multiple motor drive units supply AC currents to multiple multi-phase windings of the motor to drive the motor. The anomaly diagnosing device includes: a power consumption calculator for calculating power consumption in each of the multi-phase windings; a power difference calculator for calculating a difference in power consumption between the multi-phase windings; and a determination unit for determining that an anomaly is occurring when the absolute value of the difference has exceeded a threshold for a predetermined period of time.

公开(公告)号：US09958857B2

公开(公告)日：2018-05-01

申请号：US15483258

申请日：2017-04-10

申请人： FANUC CORPORATION

发明人： Shoutarou Hashimoto ,  Tadashi Okita ,  Yuuki Morita

IPC分类号： H02P1/54 ,  G05B11/01 ,  G05B19/404 ,  G05B19/31 ,  G05B19/4062

CPC分类号： G05B19/404 ,  G05B19/31 ,  G05B19/4062 ,  G05B2219/34013 ,  G05B2219/41059 ,  G05B2219/50297

摘要： To provide a motor control device, motor control method, and non-transitory computer readable medium recording a motor control program, which add a backlash correction amount to a position command for a motor at the appropriate timing. Included are a first position detection part that detects a first position which is a position of a movable part; a second position detection part that detects a second position which is a position of a driven part; a positional error calculation part that calculates positional error, which is deviation between a converted first position detected value and a second position detected value; and a backlash correction part that adds a backlash correction amount when the absolute value for the variation of the positional error since reversal of a position command was detected exceeds the predetermined reference value.

公开(公告)号：US09887660B2

公开(公告)日：2018-02-06

申请号：US14803307

申请日：2015-07-20

申请人： FANUC CORPORATION

发明人： Shoutarou Hashimoto ,  Tadashi Okita

IPC分类号： G02B5/00 ,  H02H7/08 ,  H02P1/04 ,  H02P3/00 ,  H02P29/024 ,  H02P3/14 ,  H02P3/18

CPC分类号： H02P29/025 ,  H02P3/14 ,  H02P3/18

摘要： A motor control device of the present invention is a control device for a motor for driving a feed shaft of a machine tool, and includes: a power outage detector for detecting a power outage of a power source for supplying power to drive the motor; a forcible decelerator for forcibly decelerating the motor in response to a torque command when a power outage is detected; a DC link voltage monitor for monitoring a DC link voltage applied to an amplifier for driving the motor; a determination unit for determining whether the value of the DC link voltage is greater than a first threshold, or whether the change ratio of the DC link voltage is greater than a second threshold; and, a torque command limiter for limiting the torque command to a predetermined torque command limiting value, in accordance with the result of determination at the determination unit.

公开(公告)号：US20170185067A1

公开(公告)日：2017-06-29

申请号：US15377346

申请日：2016-12-13

申请人： FANUC CORPORATION

发明人： Daisuke Tajima ,  Tadashi Okita

IPC分类号： G05B19/406 ,  B23Q5/10 ,  B23Q5/58 ,  B23Q11/00

CPC分类号： G05B19/406 ,  B23Q5/10 ,  B23Q5/58 ,  B23Q11/0003 ,  B23Q11/127 ,  B23Q11/14 ,  G05B19/4062 ,  G05B2219/37249 ,  G05B2219/37429

摘要： A machine tool controller according to an embodiment of the present invention, for controlling a spindle and a feed axis, includes a motor temperature obtaining unit for obtaining and outputting the winding temperature of a spindle motor as a motor temperature; an inverter temperature obtaining unit for obtaining and outputting the temperature of an inverter that drives the spindle motor as an inverter temperature; a motor temperature comparator for comparing the outputted motor temperature with an overheat temperature for the motor; an inverter temperature comparator for comparing the outputted inverter temperature with an overheat temperature for the inverter; and an overheating assessment unit for imposing a restriction on the output of the spindle motor according to the smaller one of the differences between the motor temperature and the overheat temperature for the motor and between the inverter temperature and the overheat temperature for the inverter.

公开(公告)号：US09377773B2

公开(公告)日：2016-06-28

申请号：US14692793

申请日：2015-04-22

申请人： FANUC Corporation

发明人： Shoutarou Hashimoto ,  Tadashi Okita

IPC分类号： H02K7/10 ,  G05B11/01 ,  G05B19/404 ,  G05B19/19 ,  G05B19/416

CPC分类号： G05B19/404 ,  G05B19/19 ,  G05B19/416 ,  G05B2219/41083 ,  G05B2219/41155 ,  G05B2219/49182

摘要： A motor controller is configured to judge whether or not the amount of displacement of a driven body after the direction of movement of the driven body is reversed, exceeds a predetermined threshold value, and whether or not the amount of displacement of a motor after the direction of movement of the motor is reversed, exceeds another predetermined threshold value. When the amount of displacement of the driven body exceeds the threshold value, or the amount of displacement of the motor exceeds a second threshold value, the correction of the commands to the motor is terminated.

摘要翻译： 电动机控制器被配置为判断从动体的移动方向的驱动体的位移量是否相反超过预定阈值，以及电动机在方向之后的位移量 马达的运动反转，超过另一预定阈值。 当被驱动体的位移量超过阈值或电动机的位移量超过第二阈值时，终止对电动机的指令的修正。