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    • 2. 发明专利
    • Control device for spindle with encoder
    • 带编码器的主轴控制装置
    • JP2011211768A
    • 2011-10-20
    • JP2010074221
    • 2010-03-29
    • Fanuc Ltdファナック株式会社
    • IWASHITA HEISUKEOKITA HAJIMEAKIYAMA TAKAHIRORI KO
    • H02P27/06H02P21/00H02P27/04
    • H02P21/0003B23Q15/08G05B2219/41319Y02P70/167
    • PROBLEM TO BE SOLVED: To provide a control device for a spindle having an encoder which prevents deterioration in output due to an excessive error of an excitation frequency by detecting a spindle speed from the encoder attached to the spindle and obtaining a clamp value of the excitation frequency of an induction motor using information about the obtained motor speed of a motor.SOLUTION: The control device for the spindle 6 includes the encoder 8 driving by an induction motor 2 having no speed detector, the spindle 6 including the encoder 8 for detecting a spindle position including: a spindle speed detecting part 40 for detecting the speed of the spindle 6 from the number of feedback pulses Pfb of the encoder 8 within predetermined time; a motor speed estimating part 41 for obtaining a second speed estimated value ωrest2 of the induction motor 2 from the spindle speed detected by the spindle speed detecting part 40 and a speed reduction ratio between the spindle and the induction motor; and an excitation frequency command determining part 44 for determining an excitation frequency command ω1 of the induction motor 2 on the basis of the second speed estimated value ωrest2.
    • 要解决的问题:提供一种用于具有编码器的主轴的控制装置,其通过从附接到主轴的编码器检测主轴转速并获得激励的钳位值来防止由于激励频率的过大误差而导致的输出劣化 使用关于获得的电动机速度的信息的感应电动机的频率。解决方案:主轴6的控制装置包括由没有速度检测器的感应电动机2驱动的编码器8,主轴6包括用于检测电动机的编码器8 主轴位置包括:主轴速度检测部分40,用于在预定时间内从编码器8的反馈脉冲Pfb的数量检测主轴6的速度; 电动机速度估计部41,用于从由主轴速度检测部40检测出的主轴转速和主轴与感应电动机之间的减速比求出感应电动机2的第二速度估计值ωrest2; 以及用于基于第二速度估计值ωrest2确定感应电动机2的激励频率指令ω1的激励频率指令确定部44。
    • 3. 发明专利
    • Controller of main shaft equipped with encoder
    • 带编码器的主轴控制器
    • JP2011204152A
    • 2011-10-13
    • JP2010073096
    • 2010-03-26
    • Fanuc Ltdファナック株式会社
    • IWASHITA HEISUKEOKITA HAJIMEAKIYAMA TAKAHIRORI KO
    • G05B19/416B23Q15/00B23Q17/00G05B19/18
    • G05D13/64B23Q17/10G05B19/404G05B2219/41136G05B2219/41319G05B2219/49254
    • PROBLEM TO BE SOLVED: To provide a controller for a main shaft including an encoder which can avoid the occurrence of vibration or excessive current in the main shaft, including the encoder for detecting the position of the main shaft.SOLUTION: The controller for the main shaft includes a main shaft speed detection section 20 for detecting the speed of the main shaft 6 from the number of return pulses of the encoder 8 for detecting the main shaft position; a first motor speed estimating section 21 for deriving a first motor estimated speed of an induction motor 2, from a reduction ratio of the induction motor 2; motor speed control sections (11, 12, 13), including a speed control section 11 for controlling the induction motor 2 based on a speed command and on the first motor estimated speed which is obtained by the first motor speed estimating section 21; and a slip detection section 22A for detecting that slipping has occurred on a belt 5, based on the first motor estimated speed. In this case, the controller for the main shaft does not use the first motor estimation speed for control of the induction motor 2 without a speed detector, when slippage is detected in the belt 5 by the slip detecting section 22A.
    • 要解决的问题:提供一种包括编码器的主轴的控制器,该编码器能够避免在主轴中产生振动或过大的电流,包括用于检测主轴位置的编码器。解决方案:主控制器 轴包括主轴速度检测部分20,用于根据用于检测主轴位置的编码器8的返回脉冲数来检测主轴6的速度; 用于从感应电动机2的减速比导出感应电动机2的第一电动机估计速度的第一电动机速度估计部21; 电动机速度控制部分(11,12,13),包括用于基于速度指令控制感应电动机2的速度控制部分11和由第一电动机速度估计部分21获得的第一电动机估计速度; 以及基于第一电动机估计速度检测带5上发生滑动的滑动检测部22A。 在这种情况下,当通过滑动检测部22A在带5中检测到滑动时,主轴的控制器不使用第一电动机估计速度来控制没有速度检测器的感应电动机2。