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    Method for controlling AC motor
    3.
    发明授权
    Method for controlling AC motor 有权
    交流电机控制方法

    公开(公告)号：US07501787B2

    公开(公告)日：2009-03-10

    申请号：US11633097

    申请日：2006-12-04

    申请人： Hirokazu Tajima ,  Yasuaki Hachisu

    发明人： Hirokazu Tajima ,  Yasuaki Hachisu

    IPC分类号： H02P27/00 ,  H02P27/04

    CPC分类号： G01P3/44 ,  H02P1/029 ,  H02P3/22

    摘要： An inverter that supplies a desired primary voltage (v1) to an induction motor, a current detector that detects a primary current (i1) from the inverter to the induction motor, a voltage designation value calculating unit that generates a voltage designation value (v1*) for generating the voltage v1, an idling-time speed estimating unit that calculates an estimate value (ωr#) of the rotation speed when the induction motor is idling, and a sequence circuit that commands the operations of these units are provided. The idling-time speed estimating unit switches a method for deriving the estimate value on the basis of a current value in the case where a short circuit is generated between windings when the induction motor is idling.

    摘要翻译： 1.一种向感应电动机供给期望的初级电压（v1）的逆变器，检测从逆变器到感应电动机的初级电流（i1）的电流检测器，电压指定值计算部，其生成电压指定值（v1 * ），用于计算感应电动机空转时的转速的估计值（ω＃）的空转时间速度估计单元，以及指令这些单元的动作的顺序电路。 怠速时间速度估计单元在感应电动机空转时，在绕组之间产生短路的情况下，基于当前值来切换用于导出估计值的方法。

    Variable-speed controlling device for use with an induction motor
    4.
    发明授权
    Variable-speed controlling device for use with an induction motor 有权
    用于感应电动机的变速控制装置

    公开(公告)号：US06404162B1

    公开(公告)日：2002-06-11

    申请号：US09565002

    申请日：2000-05-04

    申请人： Hirokazu Tajima ,  Shinichi Ishii ,  Hidetoshi Umida

    发明人： Hirokazu Tajima ,  Shinichi Ishii ,  Hidetoshi Umida

    IPC分类号： H02P528

    CPC分类号： H02P21/18 ,  H02P21/24 ,  Y02P80/116

    摘要： The present invention provides a variable-speed controlling device for use with an induction motor, which includes a means for compensating for the discrepancy between a secondary magnetic flux instruction value and a secondary magnetic flux actually occurring in an induction motor, realizes a satisfactory control by generating the secondary magnetic flux according to the instruction value, and can generate desired torque and improve a motor efficiency. The variable-speed controlling device according to the present invention, for use with an induction motor, includes a voltage instruction value calculating unit, an integrating unit, a power converting circuit, a current detecting unit, an induced voltage calculating unit, a position discrepancy amount calculating unit, and a compensating unit.

    摘要翻译： 本发明提供一种与感应电动机一起使用的变速控制装置，其包括用于补偿二次磁通指令值与感应电动机中实际发生的次级磁通之间的差异的装置，实现令人满意的控制 根据指令值产生二次磁通量，可以产生期望的转矩，提高电机效率。 根据本发明的用于感应电动机的变速控制装置包括电压指令值计算单元，积分单元，功率转换电路，电流检测单元，感应电压计算单元，位置偏差 量计算单元和补偿单元。

    Variable-speed control method and apparatus for AC motor
    5.
    发明授权
    Variable-speed control method and apparatus for AC motor 失效
    交流电机变速控制方法及装置

    公开(公告)号：US5880572A

    公开(公告)日：1999-03-09

    申请号：US839527

    申请日：1997-04-14

    申请人： Hirokazu Tajima ,  Hidetoshi Umida ,  Hiroshi Tetsutani

    发明人： Hirokazu Tajima ,  Hidetoshi Umida ,  Hiroshi Tetsutani

    IPC分类号： H02P21/14 ,  H02P7/42

    CPC分类号： H02P21/08 ,  H02P2207/01

    摘要： A variable-speed control apparatus computes the leakage inductance of an AC motor, correctly compensates the leakage inductance, and controls the variable speed of the AC motor. The variable-speed control apparatus has an AC signal generation circuit for generating an AC signal, and obtains a leakage inductance calculation value of the AC motor based on the AC signal and the measured actual current value. The differential value of the summation of a current command value and the AC signal is multiplied by the leakage inductance calculation value to generate a signal for use in compensating the voltage drop caused by the leakage inductance, and added to a voltage command value to cancel the deviation between the actual current value and the M-axis current command value and to obtain the second voltage command value. The second voltage command value is converted into a 3-phase voltage command value and used in controlling the AC motor, and the voltage drop caused by the leakage inductance can be compensated.

    摘要翻译： 变速控制装置计算交流电动机的漏电感，正确补偿漏电感，并控制交流电动机的变速。 变速控制装置具有用于产生AC信号的AC信号产生电路，并且基于AC信号和测量的实际电流值获得AC电动机的漏电感计算值。 电流指令值和AC信号的和的差分值乘以漏电感计算值，以产生用于补偿由漏电感引起的电压降的信号，并加到电压指令值以取消 实际电流值与M轴电流指令值的偏差，得到第二电压指令值。 第二电压指令值被转换为三相电压指令值，用于控制交流电动机，并且可以补偿由漏电感引起的电压降。

    Speed control device for electric motor
    6.
    发明授权
    Speed control device for electric motor 有权
    电动机调速装置

    公开(公告)号：US07781996B2

    公开(公告)日：2010-08-24

    申请号：US11767041

    申请日：2007-06-22

    申请人： Hirokazu Tajima

    发明人： Hirokazu Tajima

    IPC分类号： H02P7/00

    CPC分类号： H02P23/14

    摘要： In a speed control device including a speed instruction generating unit, an addition computing unit, a speed control unit, a current controlling unit, an inertia estimating unit, an inertia setting unit, a switching unit and a constant setting unit, when it is possible to perform accelerating or decelerating operation of the electric motor to estimate the inertia moments of the electric motor and a driving target thereof, an operation is carried out to derive an inertia moment estimation value. The proportional gain of the speed control unit is set through the switching unit and the constant setting unit on the basis of the inertia moment estimation value. When it is impossible to perform the above operation, the proportional gain of the speed control unit is set through the switching unit and the constant setting unit on the basis of the inertia moment manual set value.

    摘要翻译： 在包括速度指令生成单元，加法运算单元，速度控制单元，电流控制单元，惯性估计单元，惯性设定单元，切换单元和常数设定单元的速度控制装置中，当可能 为了进行电动机的加速或减速运转以估计电动机的惯性力矩及其驱动目标，进行操作以导出惯性矩估计值。 速度控制单元的比例增益基于惯性矩估计值通过切换单元和恒定设定单元来设定。 当不可能执行上述操作时，速度控制单元的比例增益基于惯性力矩手动设定值通过切换单元和恒定设定单元来设定。

    Method and apparatus for controlling an AC motor and detecting malfunctions
    7.
    发明授权
    Method and apparatus for controlling an AC motor and detecting malfunctions 失效
    用于控制交流电动机并检测故障的方法和装置

    公开(公告)号：US5623190A

    公开(公告)日：1997-04-22

    申请号：US307895

    申请日：1994-09-16

    申请人： Hirokazu Tajima ,  Hidetoshi Umida

    发明人： Hirokazu Tajima ,  Hidetoshi Umida

    IPC分类号： H02P21/00 ,  H02P21/14 ,  H02P29/02 ,  H02P5/00

    CPC分类号： H02P21/00 ,  H02P21/16 ,  H02P21/50 ,  H02P29/0241 ,  G01R31/343

    摘要： Disclosed are methods and apparatus for quickly measuring a primary resistance value of an AC motor without using high precision detectors and detecting malfunctions such as breaking of wire in the AC motor or in a power converting mechanism, open phase, and three-phase unbalance. A voltage drop attributable to the primary resistance of the AC motor can be estimated by using an estimated resistance value R.sub.1.sup.#, which is estimated in turn by an integral or proportional-plus-integral operation on the deviation between a detected magnetizing current value I.sub.M and a reference magnetizing current value I.sub.M *, in place of an actual primary resistance value R.sub.1. The time for the estimated resistance value R.sub.1.sup.# to reach the true primary resistance value is reduced with a varying reference magnetizing current value I.sub.M **. Variations of the estimated primary resistance values R.sub.1.sup.# s between the phases are corrected with a mean estimated primary resistance value R.sub.1M.sup.# according to a reference phase value .phi.*. Malfunctions such as open phase and breaking of wire are detected by comparing estimated primary resistance values obtained according to the reference phase value .phi.*.

    摘要翻译： 公开了用于快速测量交流电动机的初级电阻值而不使用高精度检测器并检测交流电动机或电力转换机构中断线的故障，开路相和三相不平衡的方法和装置。 可以通过使用估计电阻值R1＃来估计归因于AC电动机的初级电阻的电压降，所估计的电阻值R1＃依次被积分或比例加积分运算估计为检测到的磁化电流值IM和 参考磁化电流值IM *代替实际的初级电阻值R1。 估计电阻值R1＃达到真正一次电阻值的时间随参考磁化电流值IM **的变化而减小。 相位之间的估计的初级电阻值R1＃s的变化根据参考相位值phi *以平均估计的初级电阻值R1M＃进行校正。 通过比较根据参考相位值phi *获得的估计的初级电阻值来检测诸如开路和断线的故障。

    Glass substrate for data recording medium, manufacturing method thereof and polishing pad used in the method
    8.
    发明授权
    Glass substrate for data recording medium, manufacturing method thereof and polishing pad used in the method 有权
    用于数据记录介质的玻璃基板，其制造方法和该方法中使用的抛光垫

    公开(公告)号：US07300335B2

    公开(公告)日：2007-11-27

    申请号：US10765459

    申请日：2004-02-11

    申请人： Hirokazu Tajima ,  Tamaki Horisaka

    发明人： Hirokazu Tajima ,  Tamaki Horisaka

    IPC分类号： B24B7/30 ,  B24D11/00

    CPC分类号： B24B37/08 ,  B24B37/22 ,  B24B37/24 ,  B24D3/26

    摘要： A polishing pad is used when a surface of a glass workpiece is polished for manufacturing a glass substrate of information recording medium. The polishing pad has a nap layer. The nap layer includes an inner layer that contains a plurality of closed cells, and an outer layer. A plurality of pores are formed on the surface of the outer layer. The sizes of the pores are minute compared to those of the closed cells.

    摘要翻译： 当玻璃工件的表面被抛光以制造信息记录介质的玻璃基板时，使用抛光垫。 抛光垫具有薄层。 绒面层包括含有多个闭孔的内层和外层。 在外层的表面上形成多个孔。 与闭孔相比，孔的尺寸是微小的。

    Method for controlling AC motor
    9.
    发明申请
    Method for controlling AC motor 有权
    交流电机控制方法

    公开(公告)号：US20070145939A1

    公开(公告)日：2007-06-28

    申请号：US11633097

    申请日：2006-12-04

    申请人： Hirokazu Tajima ,  Yasuaki Hachisu

    发明人： Hirokazu Tajima ,  Yasuaki Hachisu

    IPC分类号： H02P27/04

    CPC分类号： G01P3/44 ,  H02P1/029 ,  H02P3/22

    摘要： An inverter that supplies a desired primary voltage (v1) to an induction motor, a current detector that detects a primary current (i1) from the inverter to the induction motor, a voltage designation value calculating unit that generates a voltage designation value (v1*) for generating the voltage v1, an idling-time speed estimating unit that calculates an estimate value (ωr#) of the rotation speed when the induction motor is idling, and a sequence circuit that commands the operations of these units are provided. The idling-time speed estimating unit switches a method for deriving the estimate value on the basis of a current value in the case where a short circuit is generated between windings when the induction motor is idling.

    摘要翻译： 一种向感应电动机提供期望的初级电压（v 1> 1）的逆变器，检测从逆变器到感应电动机的初级电流（i <1> 1）的电流检测器 ，电压指定值计算单元，其生成用于产生电压v 1的电压指定值（v> 1 * *），怠速时间速度估计单元，其计算估计值 提供当感应电动机空转时的转速的值（ω），以及指令这些单元的操作的顺序电路。 怠速时间速度估计单元在感应电动机空转时，在绕组之间产生短路的情况下，基于当前值来切换用于导出估计值的方法。