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    • 5. 发明授权
    • Crystalline propylene block-copolymer composition for use in automobile
parts
    • 用于汽车零件的结晶丙烯嵌段共聚物组合物
    • US6121363A
    • 2000-09-19
    • US251331
    • 1999-02-17
    • Ikunori SakaiMikio HashimotoTakayuki NagaiTakao NomuraMasatoshi MatsudaOsamu KitoHisayuki Iwai
    • Ikunori SakaiMikio HashimotoTakayuki NagaiTakao NomuraMasatoshi MatsudaOsamu KitoHisayuki Iwai
    • B29C45/00B29K23/00C08K3/34C08L53/00C08L53/02C08K3/22C08L23/10
    • C08L53/00
    • A crystalline propyleiie block-copolymer composition exhibiting superior flowability upon molding for use in automobile parts, which composition comprises 41 to 71% by weight of a crystalline propylene block-copolymer composed of a propylene homopolymer portion (Fp) and an ethylene/propylene random copolymer portion (Fc) and having an ethylene content of 1 to 10% by weight and a melt flow rate (MFR) of 20 to 100 g/10 min.; 12 to 22% by weight of a first hydrogenated product of a block-copolymer having a relatively smaller stylene content; 2 to 12% by weight of a second hydrogenated product of a block-copolymer having a relatively greater stylene content; and 15 to 25% by weight of talc, wherein the propylene homopolymer portion (Fp) contains 20 to 50% by weight of a low molecular weight propylene homopolymer having an MFR of 400 to 1,000 g/10 min., the average MFR being 100 to 350 g/10 min. and the isotactic pentad fraction being at least 98%, and wherein the said (Fc) has an intrinsic viscosity of 7 dl/g or higher.
    • 一种结晶丙烯嵌段共聚物组合物,其成型用于汽车部件时具有优异的流动性,该组合物包含41至71重量%的由丙烯均聚物部分(Fp)和乙烯/丙烯无规共聚物组成的结晶丙烯嵌段共聚物 (Fc),乙烯含量为1〜10重量%,熔体流动速率(MFR)为20〜100g / 10分钟。 12至22重量%的具有相对较小的苯乙烯含量的嵌段共聚物的第一氢化产物; 2至12重量%的具有相对较大的苯乙烯含量的嵌段共聚物的第二个氢化产物; 和15〜25重量%的滑石,其中丙烯均聚物部分(Fp)含有20〜50重量%的MFR为400〜1000g / 10分钟的低分子量丙烯均聚物,平均MFR为100 至350g / 10min。 和全同立构五单元组分数为98%以上,其中所述(Fc)的特性粘度为7dl / g以上。
    • 6. 发明申请
    • BRUSHLESS MOTOR DRIVER AND BRUSHLESS MOTOR SYSTEM
    • 无刷马达驱动器和无刷马达系统
    • US20120119687A1
    • 2012-05-17
    • US13069576
    • 2011-03-23
    • Shigeki MuraiMasatoshi Matsuda
    • Shigeki MuraiMasatoshi Matsuda
    • H02P6/18
    • H02P6/14
    • The brushless motor driver includes a sample and hold circuit which samples and holds a first value of the first comparison signal in a first case in which a current is forced to flow from a first phase coil of the three-phase brushless motor to a second phase coil and no current is forced to flow to a third phase coil in a first period having a preset setting time and a second value of the first comparison signal in a second case in which a current is forced to flow from the second phase coil to the first phase coil and no current is forced to flow to the third phase coil in a second period having the preset setting time subsequent to the first period. The brushless motor driver includes an addition circuit which adds up the first value and the second value sampled and held by the sample and hold circuit and outputs an addition signal depending upon a result of the addition. The brushless motor driver includes a comparison output circuit which compares a value of the addition signal with a reference voltage and outputs a second comparison signal depending upon a result of the comparison. A position of a rotor in the three-phase brushless motor is discriminated on the basis of the second comparison signal.
    • 无刷电动机驱动器包括采样和保持电路,其在第一种情况下采样并保持第一比较信号的第一值,其中电流被迫从三相无刷电动机的第一相线圈流动到第二相位 线圈,并且在第二种情况下,在第一种情况下,强制电流从第二相线圈流到第一相位线圈,并且在第一时间段内没有电流流过第三相线圈,具有预设的设定时间和第一比较信号的第二值 第一相线圈,并且在具有第一周期之后的预设设定时间的第二周期中,不强制流过第三相线圈。 无刷电动机驱动器包括加法电路,其将由采样保持电路采样和保持的第一值和第二值相加,并根据加法结果输出相加信号。 无刷电动机驱动器包括比较输出电路,其将加法信号的值与参考电压进行比较,并且根据比较结果输出第二比较信号。 基于第二比较信号来判别三相无刷电动机中的转子的位置。