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    • 3. 发明授权
    • Wire-dot impact printer
    • 点击冲击打印机
    • US5295750A
    • 1994-03-22
    • US15094
    • 1993-02-09
    • Jiro TanumaNaoji AkutsuTakao UchidaChihiro KomoriMasaru Ito
    • Jiro TanumaNaoji AkutsuTakao UchidaChihiro KomoriMasaru Ito
    • B41J2/30B41J2/235B41J9/44
    • B41J9/44
    • In a wire-dot impact printer having a capacitance detector for detecting a displacement of each armature by a sensor electrode arranged opposite the armature, a space is formed between each sensor electrode and its associated armature, and a shield pattern is formed with a small space left around each sensor electrode. The shield pattern is fed with a potential at least equal to the potential of each sensor electrode. This makes it possible to reduce the influence of noise upon detection of a capacitance by the capacitance detector. A noise canceling electrode is also disposed around each sensor electrode and is connected to the sensor electrode, whereby a noise canceling circuit is further provided to eliminate noise voltage. The noise canceling circuit can eliminate a noise voltage picked up by the sensor electrode and the noise canceling electrode.
    • 在具有电容检测器的线点冲击式打印机中,通过与衔铁相对设置的传感器电极检测每个电枢的位移,在每个传感器电极及其相关电枢之间形成空间,并且形成具有小空间的屏蔽图案 留在每个传感器电极周围。 屏蔽图案被馈送至少等于每个传感器电极的电位的电位。 这使得可以通过电容检测器来减小噪声对电容检测的影响。 噪声消除电极也设置在每个传感器电极周围并连接到传感器电极,由此进一步提供噪声消除电路以消除噪声电压。 噪声消除电路可以消除由传感器电极和噪声消除电极拾取的噪声电压。
    • 5. 发明授权
    • DC brushless motor driving method and apparatus for accurately
controlling starting position of rotor
    • 用于精确控制转子起动位置的直流无刷电机驱动方法和装置
    • US4748387A
    • 1988-05-31
    • US75034
    • 1987-07-17
    • Jiro TanumaTakao Uchida
    • Jiro TanumaTakao Uchida
    • H02P6/20B41J33/34H02P6/18H02P6/22H02K29/14H02P9/00
    • H02P6/185H02P6/22
    • A driving apparatus for controlling the drive of a direct current (DC) brushless motor including a stator having a plurality of armature coils which are provided on a generally circular stator yoke, and a rotatable rotor in which a disk-like magnet having N and S poles arranged alternately in a circumferential direction is provided on a generally circular rotor yoke to face the armature coils, includes a speed sensor for producing outputs responsive to a rotation speed of the rotor, a counter for counting the pulses which are produced by the speed sensors, a control circuit responsive to the speed sensors and counter for controlling the current applied to the armature coils in a predetermined sequence to thereby rotate the rotor, and a mechanism for cancelling a load acting on the rotor. The control circuit, at a start-up of the motor, switches the current applied to the armature coils to excite the armature coils in several different phases to thereby locate the rotor at a starting angular position, in the event when the rotor is located at the starting angular position, cancels a load acting on the rotor, at least before a last one of the phases is excited, subsequently controls rotation drive by counting output pulses of the speed sensor to determine an angular position of the rotor, and controls a rotation direction of the rotor on the basis of output pulses of the speed sensor and on a resulting count of the pulses. Also provided is a driving method for a brushless DC motor for effecting such a control.
    • 一种用于控制直流(DC)无刷电动机的驱动的驱动装置,其包括具有设置在大致圆形的定子磁轭上的多个电枢线圈的定子和可旋转的转子,其中具有N和S的盘状磁体 设置在圆周方向上交替布置的磁极设置在大致圆形的转子磁轭上以面对电枢线圈,包括用于产生响应于转子的转速的输出的速度传感器,用于对由速度传感器产生的脉冲进行计数的计数器 ,响应于速度传感器和计数器的控制电路,用于以预定顺序控制施加到电枢线圈的电流,从而使转子旋转,以及用于抵消作用在转子上的负载的机构。 控制电路在马达启动时切换施加于电枢线圈的电流,以在几个不同的相位激发电枢线圈,从而将转子定位在起始角位置,当转子位于 至少在最后一个相被激励之前,启动角位置抵消作用在转子上的负载,随后通过计算速度传感器的输出脉冲来控制旋转驱动以确定转子的角度位置,并且控制旋转 基于速度传感器的输出脉冲的转子方向和脉冲的计数。 还提供了用于实现这种控制的无刷直流电动机的驱动方法。
    • 6. 发明授权
    • Cut-sheet feeder control method
    • 切片进料器控制方法
    • US5100120A
    • 1992-03-31
    • US499429
    • 1990-06-21
    • Hiroshi KikuchiJiro TanumaTakao UchidaAkira Nagumo
    • Hiroshi KikuchiJiro TanumaTakao UchidaAkira Nagumo
    • B41J13/00B65H3/06B65H43/00
    • B41J13/0018B65H3/0669B65H43/00
    • A method of controlling a cut-sheet feeder installed on a printer to feed a cut sheet from a sheet hopper (1) included in the cut-sheet feeder to the printing unit of the printer at a sheet feeding speed corresponding to that of the printer. The printer gives a correction signal (S.sub.1) of a predetermined pulse width to the cut-sheet feeder, and then the cut-sheet feeder converts the pulse width of the correction signal into a corresponding number of pulses of a clock signal generated by its control unit (25), and obtains the difference between the number of pulses of the clock signal and a predetermined reference value to determine the deviation of the frequency of the clock signal from a reference frequency. The difference between the number of pulses of the clock signal and the reference value is added to a reference motor controlling value for driving a stepping motor (4) at a reference speed to obtain a corrected motor controlling value. When the printer gives a sheet feed command signal (S.sub.f) to the cut-sheet feeder, the stepping motor is driven for rotation according to the corrected motor controlling value.
    • PCT No.PCT / JP89 / 01061 Sec。 371 1990年6月21日第 102(e)日期1990年6月21日PCT提交1989年10月16日PCT公布。 公开号WO90 / 04520 日期:1990年5月3日。一种控制安装在打印机上的切纸进给器的方法,用于将切片从片材进给器中的片料斗(1)以片材进给速度送入打印机的打印单元 对应于打印机。 打印机向切纸供给器给出预定脉冲宽度的校正信号(S1),然后,切纸进给器将校正信号的脉冲宽度转换成由其控制产生的时钟信号的相应数量的脉冲 单元(25),并且获得时钟信号的脉冲数与预定参考值之间的差,以确定时钟信号与参考频率的频率的偏差。 将时钟信号的脉冲数与基准值之间的差加到以基准速度驱动步进电动机(4)的参考电动机控制值,以获得校正的电动机控制值。 当打印机向切纸进给器给出送纸指令信号(Sf)时,根据修正的电机控制值驱动步进电机旋转。
    • 10. 发明授权
    • Method of leading a moving body driven by a direct current brushless
motor to a starting position
    • 将由直流无刷电机驱动的移动体引导到起始位置的方法
    • US4631457A
    • 1986-12-23
    • US666047
    • 1984-10-29
    • Jiro TanumaTakao UchidaKunihal Hayashi
    • Jiro TanumaTakao UchidaKunihal Hayashi
    • H02K11/00H02P6/20H02P6/02H02K29/12
    • H02P6/20Y10S400/903
    • The present invention relates to a method of leading a moving body, such as a print head carrier of a printer of the like, which is driven by a direct current brushless motor, to a starting position. The direct current brushless motor, which forms part of the present invention, includes a stator including a plurality of armature coils secured on a stator yoke through a substrate, a disk-like magnet having N and S poles arranged alternately in the circumferential direction, the magnet being arranged to confront the armature coils, and a rotatable rotor provided with a speed-detecting slit arranged outside the magnet. Rotating power is obtained by applying an electric current corresponding to the magnetic pole of the magnet to each armature coil. A speed detector detects the speed-detecting slit and puts out a frequency pulse voltage proportional to the speed and a counter counts the output pulses from the speed detector to count out the timing to change the excitation phases to the armature coils so as to continuously rotate the rotor. The method of the present invention is characterized in that a stopper to stop the motion of the moving body is arranged so that at a position of a maximum torque of the direct current brushless motor or a predetermined position close to the maximum torque position, the moving body impinges against the stopper to stop rotation of the rotor, the count number in the counter is reset and the motor is then driven in the reverse direction to lead and locate the moving body at a starting position.
    • 本发明涉及一种将由直流无刷电动机驱动的打印机的打印头托架等移动体引导到起始位置的方法。 形成本发明一部分的直流无刷电动机包括定子,其包括通过基板固定在定子磁轭上的多个电枢线圈,具有沿圆周方向交替布置的N和S极的盘状磁体, 磁铁布置为面对电枢线圈,以及设置有设置在磁体外部的速度检测狭缝的可旋转转子。 通过将对应于磁体的磁极的电流施加到每个电枢线圈来获得旋转功率。 速度检测器检测速度检测狭缝并输出与速度成比例的频率脉冲电压,并且计数器对来自速度检测器的输出脉冲进行计数,以计算将激励相位改变为电枢线圈的定时,以便连续旋转 转子。 本发明的方法的特征在于,停止移动体的运动的止动件被布置成使得在直流无刷电动机的最大转矩或接近最大转矩位置的预定位置的位置处,移动 主体撞击止动件以停止转子的旋转,计数器中的计数值被复位,然后马达被反向驱动以引导并将移动体定位在起始位置。