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1. 发明授权

US08030878B2 Motor driving device having power failure detection function 有权
标题翻译：具有断电检测功能的电机驱动装置
公开(公告)号：US08030878B2
公开(公告)日：2011-10-04
申请号：US12958690
申请日：2010-12-02
申请人： Yasusuke Iwashita , Tadashi Okita , Masakazu Niwa
发明人： Yasusuke Iwashita , Tadashi Okita , Masakazu Niwa
IPC分类号： H02P27/04
CPC分类号： H02H3/247 , G01R31/42 , H02H7/0833 , H02P29/00
摘要： A motor driving device that accurately achieves power failure detection according to a power failure tolerance with a relatively simple configuration. A counter input computing unit determines, as a counter input value, a value that is inversely proportional to the power failure tolerance determined from a voltage amplitude value and supplies the counter input value to a counter. The counter accumulates the input value at predetermined intervals and outputs an output value. A comparator determines that power failure occurs if the output of the counter 42 exceeds a threshold value.
摘要翻译：一种电动机驱动装置，其以相对简单的结构，根据电力故障容限精确地实现停电检测。计数器输入计算单元确定作为计数器输入值的与电压振幅值确定的停电容限成反比的值，并将计数器输入值提供给计数器。计数器以预定间隔累积输入值并输出输出值。如果计数器42的输出超过阈值，则比较器确定发生电源故障。

2. 发明授权

US08664897B2 Motor drive apparatus having power failure detection unit for determining presence or absence of power failure 有权
标题翻译：具有断电检测单元的电机驱动装置，用于确定电源故障的有无
公开(公告)号：US08664897B2
公开(公告)日：2014-03-04
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。

3. 发明授权

US08018747B2 PWM rectifier 有权
标题翻译： PWM整流器
公开(公告)号：US08018747B2
公开(公告)日：2011-09-13
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 , H02M7/23
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。

4. 发明申请

US20120068637A1 MOTOR DRIVING APPARATUS 有权
标题翻译：电机驱动装置
公开(公告)号：US20120068637A1
公开(公告)日：2012-03-22
申请号：US13215563
申请日：2011-08-23
申请人： Yasusuke Iwashita , Shinichi Horikoshi , Takashi Harada , Masakazu Niwa , Koujirou Sakai
发明人： Yasusuke Iwashita , Shinichi Horikoshi , Takashi Harada , Masakazu Niwa , Koujirou Sakai
IPC分类号： H02P3/14
CPC分类号： H02P3/18 , H02P3/14 , H02P23/20
摘要： During motor acceleration control period that starts at time T1, if power supply output or supply current exceeds a predetermined level at time T2, PWM control in a PWM converter is turned off until a deceleration control period of T3 to T4 ends. As a result, DC link voltage (voltage of a power storage device) at the start of the deceleration control at time T3 drops to provide space for storing regenerative power; since the PWM control in the PWM converter is off during the deceleration control period, the regenerative power can be stored into the power storage device and reused in the next control cycle.
摘要翻译：在时刻T1开始的电动机加速控制期间，如果电力供应输出或电源电流在时间T2超过预定电平，则PWM转换器中的PWM控制被截止，直到T3至T4的减速控制周期结束。结果，在时刻T3的减速控制开始时的直流链路电压（蓄电装置的电压）下降，提供存储再生电力的空间; 由于PWM转换器中的PWM控制在减速控制期间关闭，所以再生功率可以存储到蓄电装置中并在下一个控制周期中重新使用。

5. 发明授权

US07863853B2 Electric motor control device 有权
标题翻译：电动机控制装置
公开(公告)号：US07863853B2
公开(公告)日：2011-01-04
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： H02P1/26
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。

6. 发明授权

US07368887B2 Servo control device and method of adjusting servo system 有权
标题翻译：伺服控制装置及伺服系统调整方法
公开(公告)号：US07368887B2
公开(公告)日：2008-05-06
申请号：US11356291
申请日：2006-02-17
申请人： Yasusuke Iwashita , Takahiro Akiyama , Masakazu Niwa
发明人： Yasusuke Iwashita , Takahiro Akiyama , Masakazu Niwa
IPC分类号： G05B11/32
CPC分类号： G05B19/406 , G05B2219/35292 , G05B2219/35338 , G05B2219/37078 , G05B2219/37619
摘要： A servo control device that displays, by a two-dimensional image, evaluation of control precision of a servo system, includes: an instruction unit that instructs a position instruction having periodicity; a unit that records a track of position data based on a position feedback of a servo system according to the position instruction; and a first drawing unit that draws position data based on the position feedback, data before a quarter cycle or after a quarter cycle of the position data or position data based on the position instruction before a quarter cycle or after a quarter cycle, on a two-dimensional plane including orthogonal two axes, as the axis data of the orthogonal two axes respectively.
摘要翻译：一种通过二维图像显示伺服系统的控制精度的评估的伺服控制装置包括：指示具有周期性的位置指令的指令单元; 根据位置指令，基于伺服系统的位置反馈来记录位置数据的轨迹的单元; 以及第一绘图单元，其基于位置反馈，在四分之一周期之前的数据或基于在四分之一周期之前或四分之一周期之后的位置指令的位置数据或位置数据的四分之一周期之后的位置数据包括正交两轴的三维平面分别作为正交两轴的轴数据。

7. 发明授权

US08483865B2 Numerical controller with tool trajectory display function 有权
标题翻译：具有刀具轨迹显示功能的数控机床
公开(公告)号：US08483865B2
公开(公告)日：2013-07-09
申请号：US13020165
申请日：2011-02-03
申请人： Yasusuke Iwashita , Tadashi Okita , Junichi Tezuka
发明人： Yasusuke Iwashita , Tadashi Okita , Junichi Tezuka
IPC分类号： G06F19/00
CPC分类号： G05B19/404 , G05B2219/49203
摘要： Coordinate values of a tool center point is calculated by obtaining coordinate values at each time of respective drive axes driven by a numerical controller. A tool radius compensation vector connecting the calculated tool center point at each time and an actual machining point is obtained. Then, coordinate values of the actual machining point are calculated based on the calculated coordinate values of the tool center point and the obtained tool radius compensation vector, and the trajectory of the actual machining point is displayed on a display.
摘要翻译：通过在数值控制器驱动的各个驱动轴的每次获得坐标值来计算刀具中心点的坐标值。获得每次将计算出的刀具中心点与实际加工点连接的刀具半径补偿矢量。然后，基于计算出的刀具中心点的坐标值和获得的刀具半径补偿矢量来计算实际加工点的坐标值，并且将实际加工点的轨迹显示在显示器上。

8. 发明申请

US20110234146A1 CONTROLLER OF SPINDLE PROVIDED WITH ENCODER 有权
标题翻译：编码器提供的主轴控制器
公开(公告)号：US20110234146A1
公开(公告)日：2011-09-29
申请号：US13030252
申请日：2011-02-18
申请人： Yasusuke Iwashita , Tadashi Okita , Takahiro Akiyama , Geng Li
发明人： Yasusuke Iwashita , Tadashi Okita , Takahiro Akiyama , Geng Li
IPC分类号： H02P23/00
CPC分类号： G05D13/64 , B23Q17/10 , G05B19/404 , G05B2219/41136 , G05B2219/41319 , G05B2219/49254
摘要： The controller controls a spindle connected to an induction motor via a belt by controlling the rotational velocity of the induction motor. The spindle has an encoder attached thereto for detecting the position of the spindle, but the induction motor does not have a velocity detector attached thereto. The velocity of the induction motor is estimated from the spindle velocity obtained from output of the encoder, and slip of the belt is detected based on the estimated velocity of the induction motor. When occurrence of slip of the belt is detected, the estimated velocity of the induction motor will not be used for the control of the induction motor.
摘要翻译：控制器通过控制感应电机的旋转速度通过皮带控制连接到感应电机的主轴。主轴具有附接到其上的编码器，用于检测主轴的位置，但是感应电动机没有连接有速度检测器。感应电动机的速度是根据从编码器的输出获得的主轴速度来估计的，并且基于感应电动机的估计速度来检测皮带的滑移。当检测到皮带的滑动发生时，感应电动机的估计速度将不被用于感应电动机的控制。

9. 发明授权

US08026689B2 Control device for machine tool 有权
标题翻译：机床控制装置
公开(公告)号：US08026689B2
公开(公告)日：2011-09-27
申请号：US12761191
申请日：2010-04-15
申请人： Yasusuke Iwashita , Tadashi Okita , Junichi Tezuka
发明人： Yasusuke Iwashita , Tadashi Okita , Junichi Tezuka
IPC分类号： G05B11/01
CPC分类号： G05B19/416 , G05B2219/34314
摘要： A control device for a machine tool including a feed axis driving motor; a first power consumption calculating portion calculating power consumption of the feed axis driving motor; a second power consumption calculating portion calculating power consumption of equipment adapted to be operated by constant power; and a motor control portion determining a target time constant correlated with at least one of acceleration time and deceleration time of the feed axis driving motor, based on a summation of the power consumption calculated by the first power consumption calculating portion and the power consumption calculated by the second power consumption calculating portion, and controlling the feed axis driving motor based on the target time constant.
摘要翻译：一种用于机床的控制装置，包括进给轴驱动电机; 计算进给轴驱动电机的功耗的第一功耗计算部; 第二功率消耗计算部分，用于计算适于由恒定功率运行的设备的功耗; 以及电动机控制部，其基于由所述第一功耗计算部计算出的功率消耗和由所述第一功耗计算部计算出的功率消耗的总和与由所述第一功耗计算部计算出的功耗的乘积和由第二功率消耗计算部分，并且基于目标时间常数来控制进给轴驱动电动机。

10. 发明申请

US20110202167A1 NUMERICAL CONTROLLER WITH TOOL TRAJECTORY DISPLAY FUNCTION 有权
标题翻译：具有工具轨迹显示功能的数控系统
公开(公告)号：US20110202167A1
公开(公告)日：2011-08-18
申请号：US13020165
申请日：2011-02-03
申请人： Yasusuke Iwashita , Tadashi Okita , Junichi Tezuka
发明人： Yasusuke Iwashita , Tadashi Okita , Junichi Tezuka
IPC分类号： G05B19/19
CPC分类号： G05B19/404 , G05B2219/49203
摘要： Coordinate values of a tool center point is calculated by obtaining coordinate values at each time of respective drive axes driven by a numerical controller. A tool radius compensation vector connecting the calculated tool center point at each time and an actual machining point is obtained. Then, coordinate values of the actual machining point are calculated based on the calculated coordinate values of the tool center point and the obtained tool radius compensation vector, and the trajectory of the actual machining point is displayed on a display.
摘要翻译：通过在数值控制器驱动的各个驱动轴的每次获得坐标值来计算刀具中心点的坐标值。获得每次将计算出的刀具中心点与实际加工点连接的刀具半径补偿矢量。然后，基于计算出的刀具中心点的坐标值和获得的刀具半径补偿矢量来计算实际加工点的坐标值，并且将实际加工点的轨迹显示在显示器上。

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