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    • 31. 发明授权
    • Control apparatus for brushless DC motor
    • 无刷直流电机控制装置
    • US07064504B2
    • 2006-06-20
    • US10846932
    • 2004-05-17
    • Nobuyuki ImaiYutaka TakahashiMasato Miyauchi
    • Nobuyuki ImaiYutaka TakahashiMasato Miyauchi
    • H02P21/12H02P21/13H02P21/00
    • B60L15/025B60L11/14H02P6/18H02P21/18H02P2207/05Y02T10/643Y02T10/70Y02T10/7077
    • A control apparatus for a brushless DC motor that rotatably drives the brushless DC motor including a rotor having a permanent magnet, and a stator having stator windings of a plurality of phases that generate a rotating magnetic field for rotating the rotor, by a current passage switching device constituted by a plurality of switching elements and performing successive commutation of current to the stator windings. The control apparatus includes: an angular error calculation device for calculating a sine value and a cosine value of an angular difference between an estimated rotation angle with respect to the rotation angle of the rotor and an actual rotation angle, based on a line voltage that is a difference between phase voltages of the plurality of phases on an input side of the stator winding and phase currents of the plurality of phases; and an observer for calculating the rotation angle of the rotor based on the sine value and the cosine value of the angular difference.
    • 一种用于无刷直流电动机的控制装置,其可旋转地驱动包括具有永磁体的转子的无刷直流电动机和定子,其具有通过电流通路切换产生旋转磁场的多相的定子绕组 器件由多个开关元件构成并且对定子绕组执行电流的连续换向。 控制装置包括:角度误差计算装置,用于基于线电压计算相对于转子的旋转角度的估计旋转角度与实际旋转角度之间的角度差的正弦值和余弦值 定子绕组的输入侧的多相的相电压和多相的相电流之间的差; 以及用于基于正弦值和角度差的余弦值来计算转子的旋转角度的观察器。
    • 37. 发明授权
    • Rotor angle detecting apparatus for DC brushless motors
    • 直流无刷电机转子角检测装置
    • US06707265B2
    • 2004-03-16
    • US10075245
    • 2002-02-15
    • Nobuyuki ImaiYutaka Takahashi
    • Nobuyuki ImaiYutaka Takahashi
    • H02P608
    • H02P6/185G01D5/2006
    • A rotor angle detecting apparatus for a DC brushless motor is capable of detecting the angle of the rotor of the DC brushless motor with accuracy without the need for a position detecting sensor. A motor controller has a high-frequency voltage imposer, an angle detector, a U-phase current sensor, and a W-phase current sensor for detecting the rotor angle of the DC brushless motor. The angle detector detects the rotor angle &thgr; using a current value IU_s detected by the U-phase current sensor, a current value IW_s detected by the W-phase current sensor, and high-frequency components depending on high-frequency voltages vu, vv, vw, when the high-frequency voltages vu, vv, vw are imposed on command values VU_c, VV_c, VW_c for three-phase voltages by the high-frequency voltage imposer.
    • 用于DC无刷电动机的转子角度检测装置能够精确地检测直流无刷电动机的转子的角度,而不需要位置检测传感器。 电动机控制器具有用于检测直流无刷电动机的转子角度的高频电压施放器,角度检测器,U相电流传感器和W相电流传感器。 角度检测器使用由U相电流传感器检测的电流值IU_s,由W相电流传感器检测的电流值IW_s和根据高频电压vu,vv的高频分量检测转子角度θ, vw,当高频电压vu,vv,vw被高频电压施加器施加在三相电压的指令值VU_c,VV_c,VW_c上时。
    • 39. 发明授权
    • Magnetic recording medium
    • 磁记录介质
    • US06365261B1
    • 2002-04-02
    • US09562543
    • 2000-05-02
    • Shigeharu WataseYutaka Takahashi
    • Shigeharu WataseYutaka Takahashi
    • B32B310
    • B32B7/02B32B27/34G11B5/7305Y10T428/24355Y10T428/31725
    • A conventional film-type magnetic recording medium having a overall thickness of 7 &mgr;m or less has unsatisfactory stiffness, and when surface undulations are suppressed and the thickness of the substrate is reduced, clogging at the rotary head is frequently observed. The invention solves this problem by a tape-type magnetic recording medium which comprises a nonmagnetic substrate and at least a magnetic layer thereon and has the overall thickness of 7 &mgr;m or less, wherein the width of the tape is 6.5 mm or more and the difference in the centerplane average roughness (SRa) of said magnetic layer is in the range defined below: 3 nm≦SRa (Cutoff: 800 &mgr;m)−SRa (Cutoff: 80 &mgr;m)≦15 nm Especially, the nonmagnetic substrate is an aromatic polyamide.
    • 总厚度为7μm以下的常规膜型磁记录介质的刚度不足,当表面起伏被抑制并且基板的厚度减小时,经常观察到旋转头处的堵塞。 本发明通过一种带式磁记录介质解决了这个问题,该介质包括一个非磁性基片和至少一个磁性层,总厚度为7μm或更小,其中带的宽度为6.5mm或更大, 所述磁性层的中心面平均粗糙度(SRa)在下述范围内:特别地,非磁性基材为芳香族聚酰胺。
    • 40. 发明授权
    • Lead wire forming apparatus capable of preventing the peeling of the
solder from the lead wire
    • 能够防止焊料从引线剥离的引线形成装置
    • US5535789A
    • 1996-07-16
    • US300522
    • 1994-09-02
    • Yutaka TakahashiJunichi UeharaHidemi Matsukuma
    • Yutaka TakahashiJunichi UeharaHidemi Matsukuma
    • B21D37/08H01L23/50H05K13/00H05K13/04B21F1/00
    • H05K13/0092
    • First and second dies are movably opposed to each other. The second die is for pinching a package and a lead wire of the package in cooperation with the first die with a portion of the lead wire that protrudes from the first and the second dies. A slidable base is slidably supported on a die surface of the first die and has an inclined surface. A base pushing rod is movable in a direction which is substantially perpendicular to a base surface of the slidable base. The base pushing rod has an inclined rod surface which is opposed to the inclined surface. A spring urges the slidable base to make the inclined base surface be brought into contact with the inclined rod surface. The base pushing rod moves the slidable base towards the package together with one end portion of the lead wire that is supported on the slidable base when the protruded portion of the lead wire is pushed by the wire pushing member. The slidable base may have a cam follower internal surface which defines a cam hole. In this case, a cam roller is inserted in the cam hole. The slidable base may be moved by the cam roller.
    • 第一和第二模具可移动地彼此相对。 第二模具用于与第一模具配合地夹紧包装的包装和引线,引线的一部分从第一和第二模具突出。 可滑动的基座可滑动地支撑在第一模具的模具表面上并且具有倾斜表面。 基座推杆可在基本上垂直于可滑动底座的基面的方向上移动。 基座推杆具有与倾斜表面相对的倾斜杆表面。 弹簧促使可滑动的基座使倾斜的基面与倾斜的杆表面接触。 当引线的突出部分被线推动构件推动时,基座推杆将可滑动底座与引导线的支撑在可滑动基座上的一个端部一起移动到封装件。 可滑动的底座可以具有凸轮从动件内表面,其限定凸轮孔。 在这种情况下,凸轮辊插入到凸轮孔中。 可滑动的底座可以由凸轮辊移动。