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公开(公告)号：US20090091204A1
公开(公告)日：2009-04-09
申请号：US11996616
申请日：2006-10-10
IPC分类号： H02K16/02
摘要： A motor includes a stator, a first rotor and a second rotor. The stator has a plurality of outer teeth projecting outward from an annular stator yoke, a plurality of inner teeth projecting inward from the stator yoke, and windings wound on both of the teeth. Instead of providing both of the teeth with the windings, toroidal windings can be wound on the stator yoke at each section sandwiched between the slots, which stator yoke is disposed between each one of the inner slots and corresponding each one of the outer slots. This motor is structured such that the phases of cogging torque and torque ripple existing between the stator and the second rotor can be reversed with respect to the phases of cogging torque and torque ripple existing between the stator and the first rotor.
摘要翻译： 电动机包括定子，第一转子和第二转子。 定子具有从环形定子磁轭向外突出的多个外齿，从定子磁轭向内突出的多个内齿和缠绕在两个齿上的绕组。 除了将两个齿都提供给绕组之外，环形绕组可以在夹在狭槽之间的每个部分处缠绕在定子磁轭上，定子磁轭设置在每个内槽之间和对应的每个外槽之间。 该电动机的结构使得存在于定子和第二转子之间的齿槽转矩和转矩脉动的相位可以相对于存在于定子和第一转子之间的齿槽转矩和转矩波动的相位而反转。
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公开(公告)号：US4840705A
公开(公告)日：1989-06-20
申请号：US147851
申请日：1988-01-25
申请人： Hisao Ikeda , Fumio Suzuki , Yoshitane Watanabe , Mitsunobu Matsumura , Yasuhiro Takahashi , Hirosi Murakami , Koichi Maeda
发明人： Hisao Ikeda , Fumio Suzuki , Yoshitane Watanabe , Mitsunobu Matsumura , Yasuhiro Takahashi , Hirosi Murakami , Koichi Maeda
CPC分类号： D21H17/29 , C08B31/125
摘要： Disclosed are a papermaking method comprising the steps of sheet-formation of an aqueous papermaking stock which contains a cellulose fiber or the said fiber and an inorganic filler, dewatering and drying, characterized by the addition of a starch ether derivative of a general formula (I): ##STR1## where St-O represents a starch molecule residue, R.sub.1, R.sub.2 and R.sub.3 independently represent an alkyl group having from 1 to 18 carbon atoms or a benzyl group, provided that two or more of these R.sub.1, R.sub.2 and R.sub.3 must not be a benzyl group or an alkyl group having from 5 to 18 carbon atoms at the same time, and any two of these R.sub.1, R.sub.2 and R.sub.3 may be bonded to form a cyclic structure, the said derivative containing the ether bond preferably in a degree of substitution of from 0.01 to 0.1, to the said papermaking stock in an amount of from 0.05 to 5.0% by weight of the cellulose fiber or the total of the said fiber and the inorganic filler in the said stock, as well as the said starch ether derivative of the formula (I) and a method for preparation of the said derivative.
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