公开(公告)号：US20050007058A1

公开(公告)日：2005-01-13

申请号：US10885129

申请日：2004-07-07

申请人： Yasusuke Iwashita ,  Takahiro Akiyama ,  Yuuki Morita

发明人： Yasusuke Iwashita ,  Takahiro Akiyama ,  Yuuki Morita

IPC分类号： H02P6/00 ,  H02P27/02 ,  H02P27/04 ,  H02P27/08 ,  G05B11/28

CPC分类号： H02P27/026 ,  H02P6/28 ,  H02P27/04 ,  H02P27/08

摘要： The PWM frequency to be input to a current controller that generates voltage commands for a spindle motor inverter unit is switched between multiple levels according to a current feedback value to suppress heat generation in the spindle motor and drive unit.

摘要翻译： 输入到主电动机逆变器单元产生电压指令的电流控制器的PWM频率根据电流反馈值在多个电平之间切换，以抑制主轴电动机和驱动单元中的发热。

公开(公告)号：US06822414B2

公开(公告)日：2004-11-23

申请号：US10022385

申请日：2001-12-20

申请人： Yuuki Morita ,  Shinichi Kono ,  Takahiro Akiyama

发明人： Yuuki Morita ,  Shinichi Kono ,  Takahiro Akiyama

IPC分类号： G01R1302

CPC分类号： G05B19/33 ,  G05B2219/37092 ,  G05B2219/37181

摘要： A motor controller capable of obtaining information on offsets, amplitudes and a phase difference of analog feedback signals from encoders without using special measuring device. The analog feedback signals from the encoders are A/D converted and the offsets, the amplitudes and the phase difference of A-phase and B-phase analog feedback signals are obtained based on the converted digital signals by an arithmetic section. The obtained offsets, amplitudes and phase difference are displayed by a display section of the motor controller and/or a display section of a numerical controller as a host controller. Further, the obtained offsets and amplitudes are compared with respective reference values for determining acceptability of the feedback signals from the encoders and the results of the comparison is displayed by the display section and/or the display section of the numerical controller.

摘要翻译： 一种电机控制器，能够在不使用特殊测量装置的情况下获得关于编码器的模拟反馈信号的偏移，幅度和相位差的信息。 来自编码器的模拟反馈信号被A / D转换，并且通过算术部分基于转换的数字信号获得A相和B相模拟反馈信号的偏移量，幅度和相位差。 所获得的偏移量，幅度和相位差由电动机控制器的显示部分和/或数字控制器的显示部分显示为主机控制器。 此外，将获得的偏移和幅度与用于确定来自编码器的反馈信号的可接受性的各个参考值进行比较，并且比较的结果由数字控制器的显示部分和/或显示部分显示。

公开(公告)号：US20070200990A1

公开(公告)日：2007-08-30

申请号：US11673168

申请日：2007-02-09

申请人： Jin Hirosawa ,  Norihiro Yoshida ,  Arihiro Takeda ,  Reiko Suwa ,  Hiroyuki Kimura ,  Hiroshi Tabatake ,  Yuuki Morita

发明人： Jin Hirosawa ,  Norihiro Yoshida ,  Arihiro Takeda ,  Reiko Suwa ,  Hiroyuki Kimura ,  Hiroshi Tabatake ,  Yuuki Morita

IPC分类号： G02F1/1337 ,  C09K19/02

CPC分类号： G02F1/1393 ,  G02F1/133707 ,  G02F1/134309 ,  G02F1/1362

摘要： In order to suppress noise in display, which would occur due to variations of inclination directions of liquid crystal molecules, and to improve display quality, a first structure in a shape having a discontinuous portion is provided to a first electrode, and a second structure is provided to a second electrode so as to face the discontinuous portion of the first structure. When a voltage is applied to the first and second electrodes to generate an electric field in a liquid crystal layer, the first structure controls the inclination directions of the liquid crystal molecules, and the second structure controls the inclination directions of the liquid crystal molecules existing in the discontinuous portion of the first structure. In the discontinuous portion of the first structure, the amount of light passing through the liquid crystal layer increases, and the liquid crystal molecules are aligned more vertically. Hence, light leakage is reduced.

摘要翻译： 为了抑制由于液晶分子的倾斜方向的变化而引起的显示中的噪声，并且为了提高显示质量，具有不连续部分的形状的第一结构被提供给第一电极，第二结构是 提供给第二电极以面对第一结构的不连续部分。 当向第一和第二电极施加电压以在液晶层中产生电场时，第一结构控制液晶分子的倾斜方向，并且第二结构控制存在于液晶分子中的液晶分子的倾斜方向 第一结构的不连续部分。 在第一结构的不连续部分中，通过液晶层的光的量增加，并且液晶分子更垂直地排列。 因此，光泄漏减少。