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    • 83. 发明授权
    • Crystals of vitamin D derivatives and process for the preparation thereof
    • 维生素D衍生物晶体及其制备方法
    • US06448421B1
    • 2002-09-10
    • US09202144
    • 1998-12-09
    • Tsuyoshi Yamauchi
    • Tsuyoshi Yamauchi
    • C07C40100
    • C07J9/00C07C401/00C07J71/001
    • The present invention provides crystals of the compound represented by formula (I): crystals of a vitamin D derivative which are obtained by purifying a crude or preliminarily purified product of the vitamin D derivative through a reverse phase chromatography and then crystallizing the purified derivative from an organic solvent; novel compounds which are formed during the synthesis of a vitamin D derivative as by-product; and a method for purifying a vitamin D derivative or the precursor thereof. The method of the present invention makes it possible to supply a highly purified vitamin D derivative, especially ED-71, in bulk and steadily.
    • 本发明提供由式(I)表示的化合物的晶体:维生素D衍生物的结晶,其通过反相色谱法纯化维生素D衍生物的粗产物或预纯化产物,然后将纯化的衍生物从 有机溶剂; 在合成维生素D衍生物作为副产物期间形成的新化合物; 以及维生素D衍生物或其前体的纯化方法。 本发明的方法使得可以大量和稳定地供应高度纯化的维生素D衍生物,特别是ED-71。
    • 84. 发明授权
    • Motor control apparatus and motor control method
    • 电机控制装置及电机控制方式
    • US06392377B1
    • 2002-05-21
    • US09271693
    • 1999-03-18
    • Tsuyoshi Yamauchi
    • Tsuyoshi Yamauchi
    • G05B1101
    • H04N1/1026H04N1/1013H04N1/1056H04N1/193H04N2201/0428
    • A motor control apparatus is arranged to drive and control a motor for transmitting the rotating force of the motor through a gear train. In reversing the rotation of the motor, the motor is caused to rotate at a speed higher than a normal rotation speed for a period of time which is about the same as a period of time required for absorbing a clearance or play existing between the gears. In this instance, since the motor is under no load, the motor is rotated at the higher speed with a small current and a small torque. The arrangement effectively lessens a noise generated in reversing the rotation of the motor due to the clearance or play existing in the motor driving force transmitting part.
    • 马达控制装置被布置成驱动和控制用于通过齿轮系传递马达的旋转力的马达。 在反转电动机的旋转时,电动机以比正常转速高的速度旋转一段时间,该时间长度与吸收齿轮之间存在的间隙或播放所需的时间段相同。 在这种情况下,由于电动机处于无负载状态,电动机以较小的电流和小的转矩以更高的速度旋转。 该布置有效地减轻了由于马达驱动力传递部分中存在的间隙或播放而使马达的旋转反向产生的噪声。