公开(公告)号：US06326712B1

公开(公告)日：2001-12-04

申请号：US09643950

申请日：2000-08-23

申请人： Toshiharu Nakazawa ,  Toshimitsu Barada ,  Atsushi Ooyama ,  Masafumi Inoue ,  Shinichi Sekiguchi ,  Hiroyuki Shinozaki

发明人： Toshiharu Nakazawa ,  Toshimitsu Barada ,  Atsushi Ooyama ,  Masafumi Inoue ,  Shinichi Sekiguchi ,  Hiroyuki Shinozaki

IPC分类号： F16C3204

CPC分类号： F16C32/0451 ,  F16C32/047 ,  F16C2300/42 ,  F16C2360/45

摘要： A magnetic bearing device has an electromagnet for levitating an object under electromagnetic forces, a displacement sensor for detecting the displacement of the levitated object, a controller for supplying a signal to the displacement sensor through a cable and a current to the electromagnet through a cable, and a protective plate of nonmagnetic metal material disposed between the displacement sensor and the levitated object. The controller includes a levitation control system having a noise removing filter for preventing an abnormal signal caused by the protective plate from being applied to the displacement sensor.

摘要翻译： 磁性轴承装置具有用于在电磁力下悬浮物体的电磁体，用于检测悬浮物体的位移的位移传感器，用于通过电缆将信号通过电缆和电流提供给电磁体的控制器， 以及设置在位移传感器和悬浮物体之间的非磁性金属材料的保护板。 该控制器包括具有用于防止由保护板引起的异常信号施加到位移传感器的噪声去除滤波器的悬浮控制系统。

公开(公告)号：US06809448B2

公开(公告)日：2004-10-26

申请号：US10258542

申请日：2002-10-25

申请人： Natsushi Suzuki ,  Hisashi Nara ,  Shunsuke Yoshioka ,  Toshimitsu Barada ,  Atsushi Ooyama ,  Toshiharu Nakazawa ,  Shinichi Sekiguchi ,  Hiroyuki Shinozaki

发明人： Natsushi Suzuki ,  Hisashi Nara ,  Shunsuke Yoshioka ,  Toshimitsu Barada ,  Atsushi Ooyama ,  Toshiharu Nakazawa ,  Shinichi Sekiguchi ,  Hiroyuki Shinozaki

IPC分类号： H02K502

CPC分类号： F16C32/0444 ,  F16C32/0459 ,  F16C32/0465 ,  F16C32/047 ,  F16C2300/42 ,  H01S3/0385 ,  H01S3/225 ,  H02K3/44 ,  H02K5/128 ,  H02K7/09

摘要： An excimer laser apparatus in which deterioration of the laser gas in the laser container can be suppressed, and damage to the magnetic bearings caused by the laser gas can be suppressed, and which can be reduced in size and operated efficiently, and has low power consumption. Each electromagnet (stator) (7-1) of a magnetic bearing (7) for supporting a rotary shaft (4) of a circulation fan 3 includes excitation coils. Each of the coils is arranged as one unit by embedding a coil body in a ceramic or glass type hardened material which is non-magnetic and has corrosion resistance against a laser gas. The excitation coils are attached to magnetic poles. Alternatively, coil wires (108b) of a radial magnetic bearing (108) can be isolated from a corrosive atmosphere by means of a separation wall (124) while projecting portions of cores (108b) extend through the separation wall (124) and are exposed toward a magnetic bearing rotor (108f).

公开(公告)号：US06455966B1

公开(公告)日：2002-09-24

申请号：US09660292

申请日：2000-09-12

申请人： Toshimitsu Barada ,  Atsushi Ooyama ,  Toshiharu Nakazawa ,  Shinichi Sekiguchi ,  Masakazu Komai

发明人： Toshimitsu Barada ,  Atsushi Ooyama ,  Toshiharu Nakazawa ,  Shinichi Sekiguchi ,  Masakazu Komai

IPC分类号： H02K709

CPC分类号： F16C32/0444 ,  F16C32/0457

摘要： A magnetic bearing device for use with a motor-combined structure having magnetic bearings supporting a rotatable shaft out of contact therewith and a motor for rotating the rotatable shaft. A common power supply supplies electric power to the magnetic bearings and the motor, and a motor drive power supply limits variations of the electric power supplied to the motor to at most a predetermined level with respect to variations of electric power supplied to the common power supply.

摘要翻译： 一种用于具有支撑与其不接触的可旋转轴的磁性轴承的电动机组合结构的磁性轴承装置和用于旋转可旋转轴的电动机。 公共电源向磁性轴承和电动机供给电力，并且电动机驱动电源相对于向公共电源供给的电力的变化而将提供给电动机的电力的变化限制在至多预定水平 。

公开(公告)号：US06519273B2

公开(公告)日：2003-02-11

申请号：US09785304

申请日：2001-02-20

申请人： Shinichi Sekiguchi ,  Hiroyuki Shinozaki ,  Shunichi Aiyoshizawa ,  Toshimitsu Barada ,  Atsushi Ooyama

发明人： Shinichi Sekiguchi ,  Hiroyuki Shinozaki ,  Shunichi Aiyoshizawa ,  Toshimitsu Barada ,  Atsushi Ooyama

IPC分类号： H01S322

CPC分类号： F16C32/0465 ,  F16C32/0459 ,  F16C32/0468 ,  F16C32/047 ,  F16C2300/42

摘要： A magnetic bearing enables to rotatably support a levitated body non-contactingly disposed in a hermetically sealed container filled with a gaseous process substance of a corrosive nature, while without contaminating the gaseous environment and suffering from corrosion. The magnetic bearing has an electromagnet for supporting a levitated body, a displacement sensor for detecting a levitated position of the levitated body, and a controller for supplying signals and excitation currents to the displacement sensor and the electromagnet through cables. An electromagnet target of the magnetic bearing that generates variations in magnetic fields due to rotation of the levitated body, is constructed of a single piece of ferromagnetic material, and is provided with an electrical insulation structure oriented parallel to magnetic fluxes generated by the electromagnet.

摘要翻译： 磁性轴承能够可旋转地支撑非接触地设置在填充有腐蚀性气体处理物质的气密密封容器中的悬浮体，同时不污染气体环境并遭受腐蚀。 磁性轴承具有用于支撑悬浮体的电磁体，用于检测悬浮体的悬浮位置的位移传感器，以及通过电缆向位移传感器和电磁体提供信号和激励电流的控制器。 磁悬浮轴承的电磁铁靶由于悬浮体的旋转产生磁场的变化，由单片铁磁材料构成，并具有与电磁铁产生的磁通平行取向的电绝缘结构。

公开(公告)号：US06404088B1

公开(公告)日：2002-06-11

申请号：US09657067

申请日：2000-09-07

申请人： Toshimitsu Barada ,  Atsushi Ooyama ,  Toshiharu Nakazawa

发明人： Toshimitsu Barada ,  Atsushi Ooyama ,  Toshiharu Nakazawa

IPC分类号： H02K709

CPC分类号： F16C32/0446 ,  F16C32/0442 ,  F16C2231/00

摘要： A magnetic bearing device has an object levitated in an arbitrary position between confronting electromagnets. Positional displacement sensors detect a positional displacement of the object. When the electromagnets are successively energized, the object is moved in a mechanically movable maximum range between the electromagnets, and maximum and minimum values of a detected positional displacement signal from the positional displacement sensors are detected. A middle value between the maximum and minimum values is calculated and compared with a threshold level. An adjustment signal is applied to an offset corrector which produces an offset-corrected signal from the detected positional displacement signal, so as to substantially eliminate the difference between the middle value and the threshold level so that the middle value represents a position in which the object is to be levitated between the electromagnets.

摘要翻译： 磁性轴承装置具有悬浮在面对的电磁体之间的任意位置的物体。 位置位移传感器检测物体的位置位移。 当电磁体依次通电时，物体在电磁铁之间以机械方式移动的最大范围内移动，并且检测来自位置位移传感器的检测到的位置位移信号的最大值和最小值。 计算最大值和最小值之间的中间值，并将其与阈值级别进行比较。 调整信号被应用于从检测到的位置位移信号产生偏移校正信号的偏移校正器，以便基本上消除中间值和阈值水平之间的差异，使得中间值表示对象 将在电磁铁之间悬浮。

公开(公告)号：US06617722B2

公开(公告)日：2003-09-09

申请号：US09950054

申请日：2001-09-12

申请人： Atsushi Ooyama ,  Toshiharu Nakazawa ,  Matsutaro Miyamoto

发明人： Atsushi Ooyama ,  Toshiharu Nakazawa ,  Matsutaro Miyamoto

IPC分类号： H02K2914

CPC分类号： F16C32/0446

摘要： A magnetic levitation rotating machine is provided which can stably detect the displacement and rotating speed of a rotator and, at the same time, can reduce the size of the whole apparatus, that is, can render the whole apparatus compact. The magnetic levitation rotating machine for supporting a rotator in a levitated state by magnetic force of an electromagnet or a permanent magnet comprises: a position detection plane provided in the rotator and a concave and/or a convex provided in the plane; a displacement sensor provided on the fixed side, for detecting the displacement of the plane including the concave or the convex; and a detection mechanism for detecting the displacement of the rotator and the rotating speed of the rotator from the output of the displacement sensor.

公开(公告)号：US07518332B2

公开(公告)日：2009-04-14

申请号：US11527502

申请日：2006-09-27

申请人： Toshiharu Nakazawa ,  Atsushi Ooyama

发明人： Toshiharu Nakazawa ,  Atsushi Ooyama

IPC分类号： H02P6/00

CPC分类号： H02P6/16 ,  H02K21/14 ,  H02K29/12

摘要： A brushless synchronous motor is provided in a simple configuration and at a low cost. The brushless synchronous motor comprises a rotor having salient magnets arranged in a circumferential direction, a stator having driving magnetic poles arranged in the circumferential direction, and an exciting coil wound around each driving magnetic pole, where the rotor is made in a non-circular profile. For example, the rotor may comprise a cylindrical body which has at least one flat surface perpendicular to one magnetic pole direction of the rotor, or a cylindrical body having an elliptic profile with a longer diameter in one magnetic pole direction of the rotor. A detector circuit is associated with each of a predetermined number of exciting coils for outputting a detection signal indicative of the impedance of the exciting coil in accordance with the distance between the driving magnetic pole and rotor, to detect a rotating angle of the rotor.

摘要翻译： 以简单的结构和低成本提供无刷同步电动机。 无刷同步电动机包括沿圆周方向布置的突出磁体的转子，具有沿周向布置的驱动磁极的定子和缠绕在每个驱动磁极上的励磁线圈，其中转子被制成非圆形轮廓 。 例如，转子可以包括具有垂直于转子的一个磁极方向的至少一个平坦表面的圆柱体，或者具有在转子的一个磁极方向上具有较长直径的椭圆形轮廓的圆柱体。 检测器电路与预定数量的励磁线圈中的每一个相关联，用于根据驱动磁极和转子之间的距离输出指示励磁线圈的阻抗的检测信号，以检测转子的旋转角度。