公开(公告)号：US4644157A

公开(公告)日：1987-02-17

申请号：US471708

申请日：1983-03-03

申请人： Kuniichi Ozawa ,  Yasuhiro Goto ,  Hiromi Nakase ,  Shinya Yukino

发明人： Kuniichi Ozawa ,  Yasuhiro Goto ,  Hiromi Nakase ,  Shinya Yukino

IPC分类号： G01D5/245 ,  G01P3/486 ,  G01P13/04 ,  G01D5/34

CPC分类号： G01P3/486 ,  G01D5/2451 ,  G01P13/045

摘要： An optical rotation detecting apparatus for a bushless dc motor detects rotation information of the shaft by the slits arranged at equal pitches along the circumference of a rotary disk and a photoelectric conversion element arranged circumferentially at a pitch which is an integral multiple of the slit pitch and including a first set of photoelectric conversion element pieces arranged alternately with the former thereby generating a first rotation information signal having a frequency proportional to the rotational speed of the shaft and a second rotation information signal having a 90-degree phase difference with the first rotation information signal. The phases of the first and second rotation information signals are compared to detect the direction of rotation of the shaft. The accuracy of rotation information can be further improved by increasing the number of photoelectric conversion element pieces per slit pitch. The photoelectric conversion element includes an amorphous silicon photoelectric conversion element.

摘要翻译： 用于无衬套直流电动机的光学旋转检测装置通过沿旋转盘的圆周等间距布置的狭缝和以每个狭缝间距的整数倍的间距周向布置的光电转换元件来检测轴的旋转信息，以及 包括与前者交替布置的第一组光电转换元件片，从而产生具有与轴的转速成比例的频率的第一旋转信息信号和与第一旋转信息成90度相位差的第二旋转信息信号 信号。 比较第一和第二旋转信息信号的相位以检测轴的旋转方向。 通过增加每个狭缝间距的光电转换元件的数量，可以进一步提高旋转信息的精度。 光电转换元件包括非晶硅光电转换元件。

公开(公告)号：US4525657A

公开(公告)日：1985-06-25

申请号：US587252

申请日：1984-03-07

申请人： Hiromi Nakase ,  Yasuhiro Gotoh ,  Kuniichi Ozawa

发明人： Hiromi Nakase ,  Yasuhiro Gotoh ,  Kuniichi Ozawa

IPC分类号： H02P6/10 ,  H02P6/02

CPC分类号： H02P6/10

摘要： In an electronic commutated motor, ripple of driving torque is perfectly compensated into uniform torque by controlling stator current; therein mechanical 360.degree. angle of rotation of the rotor magnet is divided into e.g. 12 partitioned ranges (of 30.degree.), said compensation being made by repeatedly reading out the same compensation data for the 30.degree. range by utilizing an address counter which is reset at each beginning of said partitioned ranges.

摘要翻译： 在电子换向电机中，通过控制定子电流，将驱动转矩的纹波完美地补偿为均匀的转矩; 其中转子磁体的机械360度旋转角度被分成例如。 12个分区范围（30°），所述补偿是通过利用在所述分区范围的每个开始被重置的地址计数器反复读出30度范围的相同补偿数据来进行的。