公开(公告)号：US20080303476A1

公开(公告)日：2008-12-11

申请号：US12132103

申请日：2008-06-03

申请人： Yasusuke IWASHITA ,  Takahiro AKIYAMA ,  Masakazu NIWA ,  Tomohisa TSUTSUMI

发明人： Yasusuke IWASHITA ,  Takahiro AKIYAMA ,  Masakazu NIWA ,  Tomohisa TSUTSUMI

IPC分类号： H02P21/14

CPC分类号： H02P21/0003 ,  H02P21/08 ,  H02P21/22

摘要： An excitation current processor of a current controller processes the excitation current corresponding to the magnetic flux instruction from the magnetic flux instruction processor. It multiplies this excitation current with a boost coefficient to obtain an excitation current instruction. Here, the boost coefficient is determined based on the difference obtained by subtracting the magnetic flux estimation value processed by the magnetic flux processor based on the excitation current feedback from the voltage conversion device from the magnetic flux instruction input from the magnetic flux instruction processor. Further, the boost coefficient can be found from the function of time from the start of the rise of the magnetic flux.

摘要翻译： 电流控制器的励磁电流处理器处理与来自磁通指令处理器的磁通指令对应的励磁电流。 它将该励磁电流与升压系数相乘以获得励磁电流指令。 这里，根据从磁通指令处理器输入的磁通指令，基于从电压变换装置的励磁电流反馈减去由磁通量处理器处理的磁通量估计值而得到的差值来确定升压系数。 此外，可以从磁通量的上升开始的时间的函数中求出升压系数。

公开(公告)号：US20080116833A1

公开(公告)日：2008-05-22

申请号：US11873653

申请日：2007-10-17

申请人： Yasusuke IWASHITA ,  Takahiro AKIYAMA ,  Masakazu NIWA ,  Geng LI

发明人： Yasusuke IWASHITA ,  Takahiro AKIYAMA ,  Masakazu NIWA ,  Geng LI

IPC分类号： H02P29/00

CPC分类号： G05B19/4065 ,  B23Q17/09 ,  G05B2219/37228 ,  G05B2219/37246 ,  G05B2219/37256 ,  G05B2219/42295 ,  G05B2219/42304

摘要： A motor control apparatus for computing or outputting motor load information, comprises: a storage unit which stores a function or table obtained in advance based on parameters used for the computation of the load information and on an actually measured value of a motor output or motor torque; and a load meter computing unit which computes the load information from the function or table stored in the storage unit by using the parameters used for the computation of the load information. With the above configuration, the load meter is computed in such a manner as to accurately indicate the load condition of a motor in real time over the entire speed range of the motor including the nonlinear control region of the motor, and the motor is controlled using the thus computed value or the computed value is displayed on a display unit.

摘要翻译： 一种用于计算或输出电动机负载信息的电动机控制装置，包括：存储单元，其基于用于负载信息的计算的参数和电动机输出或电动机转矩的实际测量值来存储预先获得的功能或表 ; 以及负载表计算单元，其通过使用用于计算负载信息的参数从存储在存储单元中的功能或表计算负载信息。 通过上述结构，计算负载计量器，以便在包括电动机的非线性控制区域的电动机的整个速度范围内实时准确地指示电动机的负载状态，并且使用 这样计算的值或计算值被显示在显示单元上。

公开(公告)号：US20070138989A1

公开(公告)日：2007-06-21

申请号：US11609880

申请日：2006-12-12

申请人： Yasusuke IWASHITA ,  Takahiro AKIYAMA ,  Masakazu NIWA

发明人： Yasusuke IWASHITA ,  Takahiro AKIYAMA ,  Masakazu NIWA

IPC分类号： H02P7/00 ,  H02P1/00

CPC分类号： G05B19/19 ,  G05B2219/42104

摘要： A fixed-position stop control apparatus (10) includes: a move-instruction generating means (22) for generating a move instruction for each control cycle; a position loop control means (25) for position controlling a rotation shaft (61) for each control cycle according to the move instruction generated by the move-instruction generating means; and a speed loop control means (35) for speed controlling the rotation shaft according to one of a speed instruction generated by a higher level control apparatus (45) and a predetermined speed instruction, thereby switching the speed control of the rotation shaft by the speed loop control means to the position control of the rotation shaft by the position loop control means. In this fixed-position stop control apparatus, the move instruction generated by the move-instruction generating means has acceleration smaller than the acceleration corresponding to the acceleration and deceleration ability of the rotation shaft. With this arrangement, time required for the rotation shaft to stop at a fixed position can be decreased.

摘要翻译： 固定位置停止控制装置（10）包括：移动指令生成装置（22），用于生成每个控制周期的移动指令; 位置循环控制装置，用于根据由所述移动指令产生装置产生的移动指令对每个控制循环进行位置控制旋转轴; 以及用于根据由上位控制装置（45）产生的速度指令和预定速度指令之一速度控制旋转轴的速度环控制装置（35），从而将旋转轴的速度控制切换到速度 循环控制装置通过位置环控制装置转动到旋转轴的位置控制。 在该固定位置停止控制装置中，由移动指令发生装置产生的移动指令的加速度小于与旋转轴的加速和减速能力对应的加速度。 通过这种布置，可以减少旋转轴在固定位置停止所需的时间。

公开(公告)号：US20110175557A1

公开(公告)日：2011-07-21

申请号：US12965432

申请日：2010-12-10

申请人： Yasusuke IWASHITA ,  Tadashi OKITA ,  Masakazu NIWA

发明人： Yasusuke IWASHITA ,  Tadashi OKITA ,  Masakazu NIWA

IPC分类号： H02P27/06

CPC分类号： H02P23/06

摘要： A motor driving apparatus wherein provisions are made to ensure that the regenerative operation of a rectifier continues as long as the supply of power from an inverter continues, and that the regenerative operation of the rectifier stops when the supply of power from the inverter ends. The apparatus includes: a detection unit which detects an input voltage and current; an instantaneous effective power calculation unit which, based on the detected input voltage and current, calculates instantaneous effective power supplied from the rectifier to the inverter; a DC component calculation unit which, based on the value of the calculated power, calculates the DC component of the effective power; and a regenerative operation stopping decision unit which compares the value of the calculated DC component with a predetermined threshold value and decides that a power regeneration operation for feeding regenerative power from the inverter back into the power supply be stopped.

摘要翻译： 一种电动机驱动装置，其中设置用于确保整流器的再生运行继续进行，只要逆变器的电力供应继续供电，并且当逆变器的电力供应终止时，整流器的再生操作停止。 该装置包括：检测单元，其检测输入电压和电流; 瞬时有效功率计算单元，基于检测到的输入电压和电流，计算从整流器向逆变器提供的瞬时有效功率; DC分量计算单元，其基于所计算的功率的值，计算有效功率的DC分量; 以及再生运转停止判定单元，其将所计算出的直流分量的值与预定阈值进行比较，并且决定用于将来自逆变器的再生电力馈送回电源的电力再生操作停止。

公开(公告)号：US20130134910A1

公开(公告)日：2013-05-30

申请号：US13612975

申请日：2012-09-13

申请人： Yasusuke IWASHITA ,  Tadashi OKITA ,  Masakazu NIWA

发明人： Yasusuke IWASHITA ,  Tadashi OKITA ,  Masakazu NIWA

IPC分类号： H02P3/14

CPC分类号： H02P3/14 ,  B29C45/7666 ,  B29C2045/7673 ,  H02P5/74 ,  H02P27/06 ,  Y02P70/26 ,  Y02P70/261

摘要： A motor drive apparatus includes a rectifier which converts AC power to DC power and DC power to AC power, an inverter which converts the DC power output by the rectifier to AC power and supplies the AC power to a motor, and which converts regenerative power from the motor to DC power and returns the DC power to the rectifier, a DC voltage detection unit which detects a DC output voltage of the rectifier, an AC voltage detection unit which detects an AC output voltage of the rectifier, a frequency calculation unit which calculates the frequency of the AC voltage; a storage unit which stores as a reference value the DC voltage at the start of the regenerative operation, and a power failure detection unit which determines the presence or absence of a power failure by using the DC voltage, the reference value, and the AC voltage frequency.

摘要翻译： 一种电动机驱动装置，其特征在于包括：将交流电转换为直流电，直流电到交流电的整流器;将由整流器输出的直流电力转换成交流电的逆变器，将交流电力提供给电动机， 电动机直流供电并返回到整流器的直流电力;检测整流器的直流输出电压的直流电压检测单元;检测整流器的交流输出电压的交流电压检测单元，计算整流器的交流输出电压的频率计算单元; 交流电压的频率; 存储单元，其以再生操作开始时的DC电压作为参考值存储;以及停电检测单元，其通过使用所述DC电压，所述参考值和AC电压来确定是否存在电力故障 频率。

公开(公告)号：US20100214809A1

公开(公告)日：2010-08-26

申请号：US12642180

申请日：2009-12-18

申请人： Yasusuke IWASHITA ,  Tadashi OKITA ,  Masakazu NIWA ,  Kenta YAMAMOTO

发明人： Yasusuke IWASHITA ,  Tadashi OKITA ,  Masakazu NIWA ,  Kenta YAMAMOTO

IPC分类号： H02M7/217

CPC分类号： H02M7/219 ,  H02M2001/0048 ,  Y02B70/1491

摘要： Disclosed is a PWM rectifier in which switching losses in a semiconductor device are reduced without degrading the response of a control system. In a PWM overmodulation region, the modulation scheme is set to a three-phase modulation scheme. In other regions, a switchover condition such as the amplitude of an input current is acquired and compared with a switchover level. If the switchover condition equals or exceeds the switchover level, the modulation scheme is switched over to a modified two-phase modulation scheme which reduces the number of switching operations to two thirds for the same PWM frequency.

摘要翻译： 公开了一种PWM整流器，其中半导体器件中的开关损耗减小而不降低控制系统的响应。 在PWM过调制区域中，将调制方案设置为三相调制方案。 在其他区域中，获取诸如输入电流的幅度的切换条件并与切换电平进行比较。 如果切换条件等于或超过切换级别，则将调制方案切换到修改的两相调制方案，将相同PWM频率的切换次数减少到三分之二。