公开(公告)号：US6049182A

公开(公告)日：2000-04-11

申请号：US993527

申请日：1997-12-18

申请人： Masaji Nakatani ,  Chiaki Yamawaki ,  Mitsunobu Yoshida

发明人： Masaji Nakatani ,  Chiaki Yamawaki ,  Mitsunobu Yoshida

IPC分类号： G11B15/46 ,  H02P6/10 ,  H02P29/00 ,  H02P7/00

CPC分类号： H02P6/10

摘要： A sinusoidal wave data stream for correcting a torque ripple of a motor is stored in a torque ripple corrective memory. As the motor rotates, rotational angle information is computed from a rotational pulse signal and a rotor magnetic pole position pulse signal, which are generated accompanying the rotation. A sinusoidal wave data corresponding to the rotational angle information is recalled. Then, the sinusoidal wave data constituting a torque ripple corrective signal is subtracted from a motor control signal. With the use of the motor control signal after the subtraction, the motor is driven and controlled. With this arrangement, the motor torque ripple, which is a main cause of speed fluctuation of a polyphase brushless motor, is suppressed and stable and precise motor speed control is achieved.

摘要翻译： 用于校正马达的扭矩波动的正弦波数据流被存储在转矩脉动校正存储器中。 随着电动机的旋转，旋转角度信息是根据旋转脉冲信号和转子磁极位置脉冲信号计算的。 回调与旋转角度信息对应的正弦波数据。 然后，从电动机控制信号中减去构成转矩脉动校正信号的正弦波数据。 减法后使用电机控制信号，驱动和控制电机。 通过这种布置，抑制了作为多相无刷电动机的速度波动的主要原因的电动机转矩脉动，并且实现了稳定和精确的电动机速度控制。

公开(公告)号：US20090051730A1

公开(公告)日：2009-02-26

申请号：US11886921

申请日：2006-03-27

申请人： Masaji Nakatani

发明人： Masaji Nakatani

IPC分类号： B41J2/165

CPC分类号： B41J2/16552 ,  B41J2/16532 ,  B41J2/16541 ,  B41J2/16544 ,  B41J29/38 ,  H05K3/1241

摘要： A discharge surface cleaning device for a liquid discharge head includes a wiping member, a washing liquid discharge device, and one or more absorbing members. The wiping member cleans the discharge surface by moving relative to the discharge surface while in contact with the discharge surface. The washing liquid discharge device applies a washing liquid directly to the wiping member. The absorbing member absorbs ink, and the washing liquid, on the wiping member.

摘要翻译： 用于排液头的排放表面清洁装置包括擦拭构件，洗涤液排出装置和一个或多个吸收构件。 擦拭构件通过在与排出表面接触的同时相对于排放表面移动来清洁排放表面。 洗涤液排出装置将洗涤液直接施加到擦拭部件。 吸收构件在擦拭构件上吸收墨水和洗涤液体。

公开(公告)号：US6031966A

公开(公告)日：2000-02-29

申请号：US984165

申请日：1997-12-03

申请人： Masaji Nakatani ,  Chiaki Yamawaki ,  Mitsunobu Yoshida

发明人： Masaji Nakatani ,  Chiaki Yamawaki ,  Mitsunobu Yoshida

IPC分类号： G01P3/44 ,  G01P3/489 ,  H02P6/06 ,  H02P23/00 ,  H02P29/00 ,  H02P5/06

CPC分类号： G01P3/489 ,  H02P23/16 ,  H02P6/06

摘要： The motor speed control device of the present invention is provided with an FG sensor and a waveform shaping circuit for obtaining N pulse signals (N.gtoreq.1 where N is an integer) in one rotation of a motor so as to control the rotation speed of the motor in accordance with period information of the FG pulse signal outputted from the waveform shaping circuit. The motor speed control device is further provided with an FG nonuniformity correcting circuit for correcting, by using respective period information of a rising edge-falling edge period and a falling edge-rising edge period, periodic nonuniformity of each period. The motor speed control device controls the motor in response to an actual speed error signal whose nonuniformity such as a duty error and a phase error has been corrected by the FG nonuniformity correcting circuit. The described arrangement permits to provide a motor speed control device having a wide control band and a large servo gain capable of accurately controlling the rotation speed of the motor.

摘要翻译： 本发明的电动机速度控制装置设置有FG传感器和波形整形电路，用于在电动机的一次旋转中获得N个脉冲信号（N> / = 1，其中N是整数），以便控制转速 根据从波形整形电路输出的FG脉冲信号的周期信息。 电动机速度控制装置还设置有FG不均匀性校正电路，用于通过使用每个周期的周期性不均匀性，通过使用上升沿下降沿周期和下降沿上升沿周期的周期信息进行校正。 电动机速度控制装置响应于由FG不均匀性校正电路校正了诸如占空误差和相位误差等不均匀性的实际速度误差信号来控制电动机。 所述布置允许提供具有宽的控制带和大的伺服增益的电动机速度控制装置，其能够精确地控制电动机的转速。

公开(公告)号：US4117080A

公开(公告)日：1978-09-26

申请号：US791995

申请日：1977-04-28

申请人： Hideo Kawasaki ,  Masaji Nakatani ,  Toshihiro Ishii ,  Hiroshi Nakagawa ,  Hiroshi Takaya

发明人： Hideo Kawasaki ,  Masaji Nakatani ,  Toshihiro Ishii ,  Hiroshi Nakagawa ,  Hiroshi Takaya

IPC分类号： B01D53/56 ,  B01D53/77 ,  C01G45/12

CPC分类号： C01G45/1214

摘要： NO.sub.x is absorbed in an alkaline aqueous solution of a permanganate and/or a manganate and the manganese compounds are reduced to form the precipitate of manganese dioxide.The manganese dioxide is dispersed in an aqueous solution of sodium or potassium hydroxide having a concentration of higher than 20% and a gas containing NO.sub.x having a molar ratio of NO.sub.2 /NO.sub.x of higher than 0.55 is contacted with the dispersion in the presence of a permanganate and/or a manganate at higher than 40.degree. C, to convert manganese dioxide to the permanganate and/or the manganate.

公开(公告)号：US06400107B1

公开(公告)日：2002-06-04

申请号：US09630177

申请日：2000-08-01

申请人： Masaji Nakatani ,  Hideshi Ohtsuka

发明人： Masaji Nakatani ,  Hideshi Ohtsuka

IPC分类号： H02K2300

CPC分类号： H02P6/085

摘要： A control unit is arranged for a synchronous motor formed of a rotor provided with a magnet. The control unit includes a 180°-conduction drive unit for performing 180°-conduction drive of the synchronous motor, a 120°-conduction drive unit for performing 120°-conduction drive of the synchronous motor, a rotation speed calculating unit for calculating the motor rotation speed, a rotation-speed-vs.-efficiency table unit storing an efficiency relative to a rotation speed of the motor, and a drive method selecting unit for selecting an optimum drive method for the current rotation speed based on the current rotation speed and information stored in the rotation-speed-vs.-efficiency table unit. Thereby, the synchronous motor performs 120°- or 180°-conduction drive in accordance with the current rotation speed to achieve the drive with an optimum efficiency.

摘要翻译： 一个控制单元被布置用于由设置有磁体的转子形成的同步电动机。 控制单元包括用于对同步电动机进行180°导通驱动的180°导通驱动单元，用于对同步电动机进行120°导通驱动的120°导通驱动单元，用于计算同步电动机的转速计算单元 电动机转速，相对于电动机的转速存储效率的转速对效率表单元;以及驱动方法选择单元，用于根据当前转速选择当前转速的最佳驱动方式 以及存储在旋转速度 - 效率表单元中的信息。 因此，同步电动机根据当前转速进行120°或180°导通驱动以实现最佳效率的驱动。

公开(公告)号：US06388416B1

公开(公告)日：2002-05-14

申请号：US09632656

申请日：2000-08-04

申请人： Masaji Nakatani ,  Hideshi Ohtsuka

发明人： Masaji Nakatani ,  Hideshi Ohtsuka

IPC分类号： H02P146

CPC分类号： H02P6/085 ,  H02P6/20 ,  H02P6/28

摘要： A motor current detection amplifier detects a motor current's areas in two phase periods with reference to a motor voltage. A controlling microcomputer computed the ratio of the motor current areas of the two phase periods and provides the same as phase difference information which is in turn used to control a motor drive voltage to apply a sine wave of a predetermined period to the motor's coil to allow 180°-driving including a sine wave conduction resistant to noise and achieving a reduced cost hike.

摘要翻译： 电动机电流检测放大器参照电动机电压在两个相位周期内检测电动机电流的面积。 控制微型计算机计算出两个相位周期的电动机电流面积的比例，并且提供与相位差信息相同的相位差信息，该相位差信息又用于控制电动机驱动电压以将预定周期的正弦波施加到电动机的线圈以允许 包括正弦波导通，抗噪音180度，实现降低成本。