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32 条记录 (耗时 0.034 秒)

    Pulse-motor driving apparatus
    22.
    发明授权
    Pulse-motor driving apparatus 失效
    脉冲电机驱动装置

    公开(公告)号：US5998955A

    公开(公告)日：1999-12-07

    申请号：US846583

    申请日：1997-04-17

    申请人： Koji Nishioka

    发明人： Koji Nishioka

    IPC分类号： G05B11/28 ,  H02P8/00 ,  H02P8/12 ,  H02P8/14 ,  H02P8/22 ,  G05B11/18

    CPC分类号： H02P8/14 ,  G05B11/28

    摘要： For efficient pulse motor drive over a wide speed range, two drive-current control methods are switched in accordance with the speed of the pulse motor. As the first method, a PWM control method generates a pulsewidth modulation signal in accordance with a value indicated by a current control pattern. The pulse-motor drive current is controlled by voltage corresponding to the pulsewidth. As the second method, a BIT control method generates a digital signal corresponding to the value indicated by the current control pattern. The pulse-motor drive current is controlled by voltage corresponding to the digital value.

    摘要翻译： 为了在宽速度范围内实现高效的脉冲电机驱动，根据脉冲电机的速度切换两种驱动电流控制方式。 作为第一种方法，PWM控制方法根据由电流控制模式表示的值产生脉宽调制信号。 脉冲电机驱动电流由对应于脉冲宽度的电压控制。 作为第二种方法，BIT控制方法产生对应于由当前控制模式指示的值的数字信号。 脉冲电机驱动电流由对应于数字值的电压控制。

    High pressure sodium vapor lamp with high color rendering
    27.
    发明授权
    High pressure sodium vapor lamp with high color rendering 失效
    高压钠蒸汽灯具有高显色性

    公开(公告)号：US5814944A

    公开(公告)日：1998-09-29

    申请号：US783443

    申请日：1997-01-16

    申请人： Naoki Saito ,  Atsunori Okada ,  Taku Sumitomo ,  Koji Nishioka

    发明人： Naoki Saito ,  Atsunori Okada ,  Taku Sumitomo ,  Koji Nishioka

    IPC分类号： H01J61/82 ,  H01J17/20

    CPC分类号： H01J61/825

    摘要： High-pressure sodium vapor lamp with high color rendering including, in an arc tube of a light transmitting material formed in a substantially cylindrical shape sealed hermetically at both axial ends, a pair of electrodes disposed internally at both axial ends of the tube and xenon gas of at least 2.5.times.10.sup.4 (Pa) sealed in the tube together with sodium vapor, is so constituted that a lamp voltage upon lighting of the lamp and represented by V (V as a unit), lamp power represented by W (watt), internal diameter of the arc tube represented by .phi. (mm) and distance between the pair of electrodes represented by d (mm) will satisfy the following formulas: 2.0.ltoreq.V/d.ltoreq.2.7 (1) and 20.ltoreq.W/.phi..ltoreq.28 (2)

    摘要翻译： 具有高显色性的高压钠蒸汽灯包括在形成为大致圆柱形的形成为两个轴向端密封的透光材料的电弧管中，一对电极设置在管的两个轴向端部处的内部和氙气体 与钠蒸汽一起密封在管中的至少2.5×10 4（Pa），被构造成在灯点亮时由V（V作为一个单位）表示的灯电压，由W（watt）表示的灯功率，内部 由φ（mm）表示的电弧管的直径和由d（mm）表示的一对电极之间的距离将满足以下公式：2.0

    Method of preparing a durable air-permeable mold
    28.
    发明授权
    Method of preparing a durable air-permeable mold 失效
    制备耐久性透气模具的方法

    公开(公告)号：US5405570A

    公开(公告)日：1995-04-11

    申请号：US213715

    申请日：1994-03-16

    申请人： Toyoji Fuma ,  Kazuyuki Nishikawa ,  Yojiro Hayashi ,  Naoshi Makiguchi ,  Takehiro Inagaki ,  Koji Nishioka ,  Mituo Kawaguchi

    发明人： Toyoji Fuma ,  Kazuyuki Nishikawa ,  Yojiro Hayashi ,  Naoshi Makiguchi ,  Takehiro Inagaki ,  Koji Nishioka ,  Mituo Kawaguchi

    IPC分类号： B22C9/02 ,  B22C9/06 ,  B22F3/22 ,  B22F5/00 ,  B28B1/26 ,  B29C33/38 ,  B22F3/10

    CPC分类号： B22F5/007 ,  B22C9/061 ,  B22F3/22 ,  B29C33/3814 ,  B22F2998/00

    摘要： A method of preparing a durable air-permeable mold having dimensional accuracy and without cracks clue to the segregation of the ingredients of the aggregate and without a surface irregularity, which comprises compounding 100 parts by weight of an aggregate obtained by compounding metal powders with metal oxide powders in a weight ratio of 5:95 to 30:70, the metal of said metal oxide powders being the same as that of the metal powders, 80% or more of said metal powders and said metal oxide powders having grain sizes of 300 .mu.m or less, with 10 to 35 by weight of an auxiliary hardening material that is softened and melted during the sintering process, and 10 to 25 by weight of a binder that contains an evaporable component, mixing them to form a slurry mixture, pouring it in a pattern mold to obtain a mold, drying the thus-obtained mold, and sintering the dried mold in an oxidative atmosphere at a temperature of 600.degree. to 1200.degree. C.

    摘要翻译： 一种制备耐久性透气性模具的方法，其具有尺寸精度并且由于骨料的成分偏析而没有表面不规则性而没有裂纹，其包括将100重量份的通过将金属粉末与金属氧化物复合而获得的骨料 重量比为5:95〜30:70的粉末，所述金属氧化物粉末的金属与金属粉末的金属相同，所述金属粉末的80％以上，所述金属氧化物粉末的粒径为300μm m以下，10〜35重量份的辅助硬化材料在烧结过程中软化和熔融，10〜25重量份含有蒸发成分的粘合剂，混合形成浆料混合物，倒入 在图案模具中获得模具，干燥由此获得的模具，并在600℃至1200℃的温度的氧化气氛中烧结干燥的模具。