公开(公告)号：US08690525B2

公开(公告)日：2014-04-08

申请号：US12999137

申请日：2009-07-14

申请人： Yoshinobu Ohtachi ,  Manabu Nonaka ,  Yasushi Maejima

发明人： Yoshinobu Ohtachi ,  Manabu Nonaka ,  Yasushi Maejima

IPC分类号： F04D29/00

CPC分类号： F04D19/042 ,  F04D27/001 ,  F04D27/0292 ,  F04D29/661 ,  F05D2260/607

摘要： A vacuum pump includes a casing having an inlet port and an outlet port, a stator portion provided inside the casing and a rotor portion having a shaft rotatably supported inside the casing and a rotor disposed on the shaft and provided with a gas transfer mechanism that transfers a gas from the inlet port to the outlet port. The rotor portion is arranged with a predetermined clearance between the rotor portion and the stator portion. A motor rotates the shaft. Vibration detection disposed in the stator portion detects vibrations by converting vibration amplitude to an electric signal. Contact detection judges an occurrence of contact between the stator portion and the rotor portion when, in the vibration detected by the vibration detection, an amplitude in frequency of a specific vibration caused by contact between the stator portion and the rotor portion exceeds a predetermined threshold value.

摘要翻译： 真空泵包括具有入口和出口的壳体，设置在壳体内部的定子部分和具有可旋转地支撑在壳体内的轴的转子部分和设置在轴上的转子，并且设置有转移机构 从入口到出口的气体。 转子部分在转子部分和定子部分之间以预定间隙布置。 电机旋转轴。 设置在定子部分中的振动检测通过将振动振幅转换为电信号来检测振动。 当通过振动检测检测到的振动中，定子部分和转子部分之间的接触导致的特定振动的频率振幅超过预定阈值时，接触检测判定定子部分和转子部分之间的接触的发生 。

公开(公告)号：US20070115209A1

公开(公告)日：2007-05-24

申请号：US11598639

申请日：2006-11-14

申请人： Yasushi Maejima

发明人： Yasushi Maejima

IPC分类号： G09G3/14

CPC分类号： G09G3/3406 ,  G09G2320/0633 ,  G09G2320/064 ,  H05B33/0845

摘要： A luminance control apparatus for a backlight of a display device in a vehicle has a first transistor and a second transistor connected to the backlight. The first transistor is controlled by pulse-width modulation control, and the second transistor is controlled to supply a low level current at nighttime and a high level current at daytime under a condition that the first transistor is ON. The duty ratio of the first transistor is varied over a full range from 0% to 100% at the nighttime, while the duty ratio of the same is varied only in a partial range at the daytime.

摘要翻译： 用于车辆中的显示装置的背光源的亮度控制装置具有连接到背光源的第一晶体管和第二晶体管。 第一晶体管由脉冲宽度调制控制控制，第二晶体管被控制为在第一晶体管导通的条件下在白天提供低电平电流并且在白天提供高电平电流。 第一晶体管的占空比在夜间在0％至100％的整个范围内变化，而其占空比仅在白天的部分范围内变化。

公开(公告)号：US06499973B2

公开(公告)日：2002-12-31

申请号：US09128712

申请日：1998-08-04

申请人： Yasushi Maejima

发明人： Yasushi Maejima

IPC分类号： F04B1700

CPC分类号： F04D19/042

摘要： A turbo molecular pump comprises a pump body having a vacuum chamber, a gas inlet port and a gas outlet port. A rotor shaft is mounted in the pump body for undergoing rotation. A rotor vane section is disposed in the vacuum chamber and has rotor vanes connected to the rotor shaft for rotation therewith. A stator vane section is disposed in the vacuum chamber and has stator vanes interleaved with the rotor vanes in spaced-apart relation. A distance between at least one of the rotor vanes and an adjacent one of the stator vanes is set to a value in accordance with a mean free path of molecules contained in a gas flowing between the rotor vanes and the stator vanes such that a pressure of the vacuum chamber is not less than 10 mTorr during a normal operation of the turbo molecular pump. Alternatively, the distance between at least one of the rotor vanes and an adjacent one of the stator vanes is set to a value in accordance with a mean free path of molecules contained in a gas flowing between the rotor vanes and the stator vanes such that a discharge throughput of the turbo molecular pump during a normal operation thereof is not less than 1000 SCCM.

摘要翻译： 涡轮分子泵包括具有真空室，气体入口和气体出口的泵体。 转子轴安装在泵体内以进行旋转。 转子叶片部分设置在真空室中，并具有与转子轴连接的转子叶片以与其一起转动。 定子叶片部分设置在真空室中，并且具有与转子叶片间隔开的交错的定子叶片。 至少一个转子叶片和相邻的一个定子叶片之间的距离被设定为根据在转子叶片和定子叶片之间流动的气体中包含的分子的平均自由程的数值，使得压力 在涡轮分子泵的正常操作期间，真空室不小于10mTorr。 或者，至少一个转子叶片和相邻的一个定子叶片之间的距离被设定为根据在转子叶片和定子叶片之间流动的气体中包含的分子的平均自由程的值，使得 涡轮分子泵在其正常运行期间的排放通量不小于1000SCCM。

公开(公告)号：US09790946B2

公开(公告)日：2017-10-17

申请号：US13820468

申请日：2011-07-21

申请人： Yoshinobu Ohtachi ,  Yasushi Maejima ,  Tsutomu Takaada

发明人： Yoshinobu Ohtachi ,  Yasushi Maejima ,  Tsutomu Takaada

IPC分类号： F04D19/04 ,  F04D1/00 ,  F04D29/64 ,  F04D29/058

CPC分类号： F04D19/042 ,  F04D1/00 ,  F04D19/044 ,  F04D29/023 ,  F04D29/058 ,  F04D29/32 ,  F04D29/644 ,  F05D2230/10

摘要： An exhaust pump includes: a cylindrical rotating member; an outer cylindrical fixed member; an inner cylindrical fixed member a helical inner thread groove exhaust passage provided between the cylindrical rotating member and the inner cylindrical fixed member; connecting opening portions that are opened in the cylindrical rotating member and that lead a part of gas existing in the vicinity of the outer periphery of the cylindrical rotating member towards the inner thread groove exhaust passage. A gap between an upstream end of the connecting opening portions and lowermost stage rotor blades provided at the outer periphery of the cylindrical rotating member which is located upstream of the connecting opening portions has a dimension equal to or greater than a dimension that enables insertion, into the gap, of a tool for opening the connecting opening portions.

公开(公告)号：US07390164B2

公开(公告)日：2008-06-24

申请号：US10571642

申请日：2004-08-27

申请人： Yasushi Maejima ,  Yutaka Inayoshi ,  Shinji Kawanishi ,  Kou Sakurai ,  Hiroyuki Suda ,  Takeshi Akimoto

发明人： Yasushi Maejima ,  Yutaka Inayoshi ,  Shinji Kawanishi ,  Kou Sakurai ,  Hiroyuki Suda ,  Takeshi Akimoto

IPC分类号： F04D19/04 ,  F01D1/36

CPC分类号： F04D19/042 ,  F04D19/04 ,  F04D29/266

摘要： Provided are a fixing structure for fixing a rotor to a rotor shaft, in which the contact state of the contact surfaces of the rotor shaft and the rotor is stabilized to thereby maintain the rotation balance of the rotor shaft and the rotor, making it possible to prevent oscillation, and a turbo molecular pump having such a fixing structure. On the outer peripheral portion of the upper surface of a fastening portion (253), there is concentrically formed a rotor shaft (213) side contact surface (257) to be brought into contact with a rotor (103). Further, in the inner periphery of the contact surface (257), there is formed a spot facing portion (259) whose upper surface is recessed from the contact surface (257). Thus, when the rotor shaft (213) is fastened to the rotor (103), there is formed, at the portion where the spot facing portion (259) is formed, a gap (265) which has a depth corresponding to the depth of the spot facing portion (259) and which is between the contact surface (187) of the rotor (103) and the spot facing portion (259).

摘要翻译： 提供了一种用于将转子固定到转子轴的固定结构，其中转子轴和转子的接触表面的接触状态稳定，从而保持转子轴和转子的旋转平衡，使得可以 防止振动，以及具有这种固定结构的涡轮分子泵。 在紧固部（253）的上表面的外周部上同心地形成与转子（103）接触的转子轴（213）侧接触面（257）。 此外，在接触面（257）的内周形成有上表面从接触面（257）凹陷的光斑对置部（259）。 因此，当转子轴（213）紧固到转子（103）时，在形成有点对面部分（259）的部分形成有与深度相对应的深度的间隙（265） 位于转子（103）的接触表面（187）和光斑对向部分（259）之间的光斑对置部分（259）。

公开(公告)号：US5955811A

公开(公告)日：1999-09-21

申请号：US598375

申请日：1996-02-08

申请人： Akira Chiba ,  Tadashi Fukao ,  Yasushi Maejima

发明人： Akira Chiba ,  Tadashi Fukao ,  Yasushi Maejima

IPC分类号： F16C32/04 ,  F16C39/06 ,  H02K7/09 ,  H02K17/16 ,  H02K17/42

CPC分类号： F16C32/0459 ,  F16C32/0491 ,  F16C32/0493 ,  H02K17/165 ,  H02K7/09

摘要： A high speed electromagnetic rotating machine is arranged to avoid heat generation due to mutual inductance between a stator and rotor and has a stator provided with drive windings for generating a rotating magnetic field to rotate the rotor and position control windings fitted to the stator for generating a magnetic field having a different number of poles than that of the drive windings for controlling the axial or radial position of the rotor when an electric current sufficient to unbalance the magnetic field applied to the rotor by the drive windings is supplied to the position control windings. The rotor has a cage conductors interconnected to form a plurality of closed circuits mounted to the rotor, the closed circuits having a number of poles set so that there is no mutual inductance between the position control windings and the cage conductors. The cage conductors are connected by circumferentially-divided end rings rigidly connected by a retaining ring or by axially divided end rings directly connected to the rotor shaft. In one embodiment, the cage conductors are arranged in four-pole closed circuits, the drive windings have four poles, and the position control windings have two poles. In an alternative embodiment, the cage conductors may be arranged in two-pole closed circuits, the drive windings have two poles and the position control windings have four poles.

摘要翻译： 布置高速电磁旋转机器，以避免由于定子和转子之间的互感引起的热量产生，并且具有设置有用于产生旋转磁场的驱动绕组的定子，以使转子和装配到定子上的位置控制绕组产生 磁场具有与用于控制转子的轴向或径向位置的驱动绕组数不同的极数，当通过驱动绕组将足以不平衡施加到转子的磁场的电流提供给位置控制绕组时。 转子具有互连以形成安装到转子的多个闭合回路的保持架导体，闭合回路具有多个极点，使得位置控制绕组和保持架导体之间不存在互感。 笼式导体通过由保持环刚性连接的周向分隔的端环或直接连接到转子轴的轴向分开的端环连接。 在一个实施例中，保持架导体布置在四极闭合电路中，驱动绕组具有四个极，并且位置控制绕组具有两个极。 在替代实施例中，保持架导体可以布置在两极闭合电路中，驱动绕组具有两个极，并且位置控制绕组具有四个极。