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。

公开(公告)号：US06259611B1

公开(公告)日：2001-07-10

申请号：US09409999

申请日：1999-09-30

申请人： Junichi Ito ,  Shinichi Ishii ,  Hidetoshi Umida

发明人： Junichi Ito ,  Shinichi Ishii ,  Hidetoshi Umida

IPC分类号： H02M112

CPC分类号： H02M7/53875 ,  H02M7/5395

摘要： A PWM power converter is provided which includes an adder that adds a high-frequency signal from a high-frequency generator to a voltage command signal, and a PWM generator of carrier comparison type or space vector type that generates a PWM signal based on the output of the adder, which PWM signal is used for driving switching devices to provide a desired output voltage.

摘要翻译： 提供一种PWM功率转换器，其包括将来自高频发生器的高频信号与电压指令信号相加的加法器，以及基于输出产生PWM信号的载波比较型或空间矢量类型的PWM发生器 该PWM信号用于驱动开关器件以提供期望的输出电压。

公开(公告)号：US5608302A

公开(公告)日：1997-03-04

申请号：US312601

申请日：1994-09-27

申请人： Hidetoshi Umida

发明人： Hidetoshi Umida

IPC分类号： H02P21/00 ,  H02P21/14 ,  H02P27/04 ,  H02P27/06 ,  H02P5/34

CPC分类号： H02P21/0003 ,  H02P23/0004

摘要： An apparatus for driving an AC motor at variable speeds facilitates arbitrary setting or adjustment of equivalent primary resistance of an AC motor. In one embodiment of the present invention, a reference AC voltage generator outputs reference AC voltage values for each phase of the AC motor, and signals derived from the reference voltage values are in turn used by a power converter to supply the AC motor with variable voltage and frequency. In this embodiment, two or more phase currents are fed back to, and subtracted from, the reference voltage values via a regulator. In another embodiment, an angular-frequency/biaxial-reference-voltage value generator generates a reference primary angular frequency value and biaxial reference voltage values of the AC motor in a rotating orthogonal coordinate system. In this embodiment, two or more of the AC motor's phase currents are fed back to, and subtracted from, the biaxial reference voltage values via a vector transformer and a regulator. The present invention not only avoids power loss associated with using resistors, but it also obviates manual, apparatus-by-apparatus adjustment of reference AC voltage values used to drive a given AC motor.

摘要翻译： 用于以可变速度驱动AC电动机的装置有助于任意设定或调整AC电动机的等效初级电阻。 在本发明的一个实施例中，参考交流电压发生器输出交流电动机的各相的参考交流电压值，并且由参考电压值导出的信号又被功率转换器用于向交流电动机提供可变电压 和频率。 在该实施例中，经由调节器将两个或更多个相电流反馈至参考电压值并从其中减去。 在另一实施例中，角频率/双轴参考电压值发生器在旋转正交坐标系中产生参考主角频率值和AC电动机的双轴参考电压值。 在本实施例中，AC电动机的相电流中的两个或更多个通过矢量变换器和调节器反馈到双轴参考电压值并从其中减去。 本发明不仅避免了与使用电阻相关联的功率损耗，而且也避免了用于驱动给定AC电动机的参考AC电压值的手动逐个装置调整。

公开(公告)号：US5489829A

公开(公告)日：1996-02-06

申请号：US171467

申请日：1993-12-22

申请人： Hidetoshi Umida

发明人： Hidetoshi Umida

IPC分类号： H02P29/00 ,  G05B13/02 ,  G05B23/02 ,  G05B11/42

CPC分类号： G05B17/02

摘要： A parameter identifier which estimates parameters of a plant includes a model, a subtracter, a delay circuit, and a parameter adaptive mechanism. Disturbances are assumed to be represented by an impulse train consisting of a finite number (=m) of impulses. The model estimates n state variables and the output of the plant on the basis of the input and output of the plant. The subtracter outputs the error between the output of the plant and the estimated output. The delay circuit delays the state variables outputted from the model by N (.ltoreq.n+m+1) samples before applying them to the parameter adaptive mechanism. The parameter adaptive mechanism calculates the parameters on the basis of the products of the error and the delayed state variables. The number N is determined such that the effect of the disturbance on the error disappears in N samples from the beginning of the disturbance. This makes it possible for the parameter adaptive mechanism to output estimated parameters free from the influence of the disturbance. The present invention can also be applied to multi-inertia machinery.

摘要翻译： 估计工厂参数的参数标识符包括模型，减法器，延迟电路和参数自适应机制。 假定扰动由由有限数量（= m）的脉冲组成的脉冲串表示。 该模型基于工厂的投入和产出来估计n个状态变量和工厂的产出。 减法器输出工厂输出与估计输出之间的误差。 延迟电路在将它们应用于参数自适应机制之前，将从模型输出的状态变量延迟N（

公开(公告)号：US06377018B2

公开(公告)日：2002-04-23

申请号：US09800258

申请日：2001-03-06

申请人： Hirokazu Tajima ,  Hidetoshi Umida

发明人： Hirokazu Tajima ,  Hidetoshi Umida

IPC分类号： H02P528

CPC分类号： H02P21/18 ,  H02P21/26

摘要： A control apparatus for estimating the flux, the current, and the speed of an AC motor using the current and the voltage, and controlling the vector of an AC motor using the estimated speed, a flux command, and a torque current command. The speed is estimated by adding a product of the deviation between the actual value and the estimated value of a magnetization current, the level of a torque current correspondence value, the sign correspondence value of a primary frequency command value, and a gain to an outer product of an estimated current deviation and an estimated flux. Thus, a stable speed estimating operation can be performed to successfully operate the motor in a low speed area in which a voltage frequency applied to the motor is extremely low.

摘要翻译： 一种控制装置，用于使用电流和电压来估计交流电动机的通量，电流和速度，并且使用估计速度，磁通指令和转矩电流指令来控制交流电动机的矢量。 通过将实际值与磁化电流的估计值，转矩电流对应值的电平，初级频率指令值的符号对应值和增益加到外部的乘积来估计速度 估计电流偏差和估计通量的乘积。 因此，可以执行稳定的速度估计操作，以在施加到电动机的电压频率非常低的低速区域中成功地操作电动机。

公开(公告)号：US6060860A

公开(公告)日：2000-05-09

申请号：US271322

申请日：1999-03-18

申请人： Junichi Itoh ,  Hidetoshi Umida ,  Hiroyuki Yonezawa

发明人： Junichi Itoh ,  Hidetoshi Umida ,  Hiroyuki Yonezawa

IPC分类号： H02P1/30 ,  H02P21/00 ,  H02P27/04 ,  H02P27/06 ,  H02M7/48 ,  H02P7/36

CPC分类号： H02P1/30 ,  H02P21/34

摘要： A control apparatus for variably controlling a speed of an induction motor includes a voltage generator, adders, a rotating speed calculating device, a rotating direction detecting device, and a multiplier. The voltage generator is operated for a predetermined period of time at the start or restart of the induction motor to cause self-excited oscillation in a control system including the voltage generator, the induction motor and the PWM inverter. The rotating speed calculating device obtains the rotating speed data, and the rotating direction detecting device detects the rotating direction of the induction motor based on the .alpha.- and .beta.-axis components, on the stationary coordinate, of the primary current of the induction motor. And, the PWM inverter is started based on the obtained rotating speed data and rotating direction. The control apparatus facilitates starting the PWM inverter that supplies electric power to the induction motor or restarting the PWM inverter after the AC electric power supply to the PWM inverter has recovered from a momentary service interruption.

摘要翻译： 用于可变地控制感应电动机的速度的控制装置包括电压发生器，加法器，转速计算装置，旋转方向检测装置和乘法器。 在感应电动机的启动或重启时，电压发生器工作一段预定时间，在包括电压发生器，感应电动机和PWM逆变器的控制系统中引起自激振荡。 旋转速度计算装置获得旋转速度数据，并且旋转方向检测装置基于感应电动机的初级电流的固定坐标上的α和β轴分量来检测感应电动机的旋转方向。 并且，基于获得的转速数据和旋转方向启动PWM逆变器。 控制装置有助于启动向逆变器提供电力的PWM逆变器或在PWM逆变器的交流电源从瞬时服务中断恢复之后重新起动PWM逆变器。

公开(公告)号：US5828199A

公开(公告)日：1998-10-27

申请号：US908575

申请日：1997-08-08

申请人： Hirokazu Tajima ,  Hidetoshi Umida ,  Hiroshi Tetsutani

发明人： Hirokazu Tajima ,  Hidetoshi Umida ,  Hiroshi Tetsutani

IPC分类号： H02P21/00 ,  H02P21/08 ,  H02P21/14 ,  H02P27/04 ,  H02P7/622

CPC分类号： H02P21/08 ,  H02P21/18 ,  H02P21/26

摘要： A variable speed controller for an induction motor that estimates the primary angular frequency and the speed without causing any error in the drive region where the induced voltage is low. The primary angular frequency and speed estimating device includes: a changeover signal generator that generates a changeover signal indicative of a first mode of operation when the induced voltage is greater than the changeover threshold, and a second mode of operation when the induced voltage is less than the changeover threshold; a differentiator, filter, etc., for estimating the load torque; a sample holder that holds the estimated load torque in the second mode of operation; an adder that generates the acceleration and deceleration torque; an integrator that integrates the acceleration and deceleration torque with the mechanical time constant of the induction motor to obtain the second generated speed; an adder that generates a second primary angular frequency; and an output device that in the first mode of operation outputs the first generated primary angular frequency as the reference primary angular frequency and the first generated speed as the estimated speed, and in the second mode of operation outputs the second generated primary angular frequency as the reference primary angular frequency and the second generated speed as the estimated speed.

摘要翻译： 用于感应电动机的变速控制器，其估计主要角频率和速度，而不会在感应电压低的驱动区域中引起任何误差。 主角频率和速度估计装置包括：切换信号发生器，其在感应电压大于转换阈值时产生指示第一操作模式的转换信号，以及当感应电压小于转换阈值时的第二操作模式 转换阈值 用于估计负载转矩的微分器，滤波器等; 在第二操作模式下保持估计负载转矩的样本保持器; 产生加速和减速转矩的加法器; 积分器，其将加速和减速转矩与感应电动机的机械时间常数相加以获得第二生成速度; 产生第二主角频率的加法器; 以及在第一操作模式下输出第一产生的主角频率作为基准主角频率和第一生成速度作为估计速度的输出装置，并且在第二操作模式中，将第二生成的主角频率作为 参考主角频率和第二生成速度作为估计速度。

公开(公告)号：US5506930A

公开(公告)日：1996-04-09

申请号：US288953

申请日：1994-08-11

申请人： Hidetoshi Umida

发明人： Hidetoshi Umida

IPC分类号： H02P23/00 ,  G05F1/10

CPC分类号： H02P23/16

摘要： The present invention provides a control apparatus that stably controls a mechanical system incorporating a variable speed motor by suppressing mechanical vibrations without requiring the use of a motor speed detector. In accordance with the present invention, a power converter driving the motor is controlled based on a result fed from a weighting adder that calculates a weighted sum of the mechanical system's state variables, which are estimated by a first state observer to which detected current and voltage values are fed, and a target current value or a target voltage value. Alternatively, the power converter is controlled based on a result fed from a weighting adder that calculates a weighted sum of the state variables, which are estimated by a second state observer to which detected current value and a target voltage value are fed, and a target current value or a target voltage value. As an additional alternative, mechanical vibrations are suppressed by providing a control apparatus having a combination of a current regulator and a filter, thereby providing the control apparatus with high-frequency characteristics which show a small phase delay and a low gain while preventing response deterioration and control error by increasing feedback gain in a low frequency region.

摘要翻译： 本发明提供一种控制装置，其通过抑制机械振动而不需要使用电动机速度检测器来稳定地控制包含变速电动机的机械系统。 根据本发明，驱动马达的功率转换器是根据加权加法器的结果来控制的，所述加权加法器计算机械系统的状态变量的加权和，所述加权总和由第一状态观测器估计，检测电流和电压 进给值，目标电流值或目标电压值。 或者，功率转换器基于从加权加法器馈送的结果来控制，该加权加法器计算通过第二状态观测器估计的状态变量的加权和，该第二状态观测器被馈送到检测到的当前值和目标电压值，以及目标 当前值或目标电压值。 作为另外的替代方案，通过提供具有电流调节器和滤波器的组合的控制装置来抑制机械振动，从而为控制装置提供具有小的相位延迟和低增益的高频特性，同时防止响应恶化， 通过增加低频区域中的反馈增益来控制误差。

公开(公告)号：US07180259B2

公开(公告)日：2007-02-20

申请号：US11175024

申请日：2005-07-06

申请人： Yasushi Matsumoto ,  Hidetoshi Umida

发明人： Yasushi Matsumoto ,  Hidetoshi Umida

IPC分类号： H02P7/00

CPC分类号： H02P5/74

摘要： The driving apparatus according to the invention includes an inverter that drives multiple induction motors connected in parallel, and a secondary current calculating circuit that calculates the components i2W and i2L of a total secondary current value, which is the sum of the secondary currents of all the motors. The apparatus further includes a current deviation quantity calculating circuit that calculates a deviation quantity, for which the total secondary current value deviates from a reference trace. A torque regulating circuit regulates the motor torque based on the calculated deviation quantity. The driving apparatus for driving multiple induction motors according to the invention facilitates quickly detecting the widening caused in the rotating speed differences and preventing the rotating speed differences from widening.

摘要翻译： 根据本发明的驱动装置包括驱动并联连接的多个感应电动机的逆变器，以及二次电流计算电路，其计算一个或多个电动机的组件i 2W 2和i 2L 总二次电流值，即所有电机的二次电流之和。 该装置还包括电流偏差量计算电路，该电流偏差量计算电路计算总二次电流值偏离参考轨迹的偏差量。 扭矩调节电路根据计算的偏差量来调节电动机转矩。 根据本发明的用于驱动多个感应电动机的驱动装置有助于快速检测在转速差引起的加宽，并防止转速差加大。

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。