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公开(公告)号：US20070195479A1
公开(公告)日：2007-08-23
申请号：US10593611
申请日：2005-03-16
CPC分类号： F16C32/0448 , F16C32/0459
摘要： An active magnetic bearing (100) with autodetection of position, the bearing comprising at least first and second opposing electromagnets (120, 130) forming stators disposed on either side of a ferromagnetic body (110) forming a rotor and held without contact between said electromagnets. The first and second electromagnets (120, 130) each comprising a magnetic circuit (121; 131) essentially constituted by a first ferromagnetic material and co-operating with said ferromagnetic body to define an airgap, together with an excitation coil (122; 132) powered from a power amplifier whose input current is servo-controlled as a function of the position of the ferromagnetic body relative to the magnetic circuits of the first and second electromagnets. The position of the ferromagnetic body (110) being measured from the inductance detected between the two electromagnets (120, 130) in response to simultaneous injection into both opposing electromagnets of a sinusoidal current at a frequency that is greater than the closed loop passband of the system. The magnetic circuit (121; 131) of each electromagnet further includes a portion (124; 134) in the vicinity of the excitation coil (122; 132) that uses a second ferromagnetic material having magnetic permeability that is lower than that of the first material and electrical resistivity that is higher than that of the first material so as to encourage the passage of the high frequency magnetic fields that are generated in the bearing.
摘要翻译： 一种具有自动检测位置的主动磁轴承（100），所述轴承包括至少第一和第二相对电磁体（120,130），所述至少第一和第二相对的电磁体（120,130）形成定子，所述定子设置在形成转子的铁磁体（110）的任一侧上，并且保持在所述电磁体 。 第一和第二电磁体（120,130）各自包括基本上由第一铁磁材料构成并与所述铁磁体配合以限定气隙的磁路（121; 131）以及励磁线圈（122; 132） 由输入电流作为铁磁体相对于第一和第二电磁体的磁路的位置的函数进行伺服控制的功率放大器供电。 铁磁体（110）的位置是根据在两个电磁体（120,130）之间检测到的电感测量的，响应于以大于该闭环通带的频率的正弦电流的两个相对的电磁体同时注入 系统。 每个电磁体的磁路（121; 131）还包括在激励线圈（122; 132）附近的使用具有低于第一材料的导磁率的第二铁磁材料的部分（124; 134） 电阻率高于第一材料的电阻率，以促进在轴承中产生的高频磁场的通过。
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公开(公告)号：US07719151B2
公开(公告)日：2010-05-18
申请号：US10593611
申请日：2005-03-16
IPC分类号： H02K7/09
CPC分类号： F16C32/0448 , F16C32/0459
摘要： An active magnetic bearing (100) with autodetection of position, the bearing comprising at least first and second opposing electromagnets (120, 130) forming stators disposed on either side of a ferromagnetic body (110) forming a rotor and held without contact between said electromagnets. The first and second electromagnets (120, 130) each comprising a magnetic circuit (121; 131) essentially constituted by a first ferromagnetic material and co-operating with said ferromagnetic body to define an airgap, together with an excitation coil (122; 132) powered from a power amplifier whose input current is servo-controlled as a function of the position of the ferromagnetic body relative to the magnetic circuits of the first and second electromagnets. The position of the ferromagnetic body (110) being measured from the inductance detected between the two electromagnets (120, 130) in response to simultaneous injection into both opposing electromagnets of a sinusoidal current at a frequency that is greater than the closed loop passband of the system. The magnetic circuit (121; 131) of each electromagnet further includes a portion (124; 134) in the vicinity of the excitation coil (122; 132) that uses a second ferromagnetic material having magnetic permeability that is lower than that of the first material and electrical resistivity that is higher than that of the first material so as to encourage the passage of the high frequency magnetic fields that are generated in the bearing.
摘要翻译： 一种具有自动检测位置的主动磁轴承（100），所述轴承包括至少第一和第二相对电磁体（120,130），所述至少第一和第二相对的电磁体（120,130）形成定子，所述定子设置在形成转子的铁磁体（110）的任一侧上，并且保持在所述电磁体 。 第一和第二电磁体（120,130）各自包括基本上由第一铁磁材料构成并与所述铁磁体配合以限定气隙的磁路（121; 131）以及励磁线圈（122; 132） 由输入电流作为铁磁体相对于第一和第二电磁体的磁路的位置的函数进行伺服控制的功率放大器供电。 铁磁体（110）的位置是根据在两个电磁体（120,130）之间检测到的电感测量的，响应于以大于该闭环通带的频率的正弦电流的两个相对的电磁体同时注入 系统。 每个电磁体的磁路（121; 131）还包括在激励线圈（122; 132）附近的使用具有低于第一材料的导磁率的第二铁磁材料的部分（124; 134） 电阻率高于第一材料的电阻率，以促进在轴承中产生的高频磁场的通过。
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公开(公告)号：US06927517B2
公开(公告)日：2005-08-09
申请号：US10416805
申请日：2001-11-16
IPC分类号： F01D25/16 , F02C7/06 , F04D29/04 , F04D29/056 , F04D29/058 , F16C32/04 , F16C39/06 , H02K3/26 , H02K21/12 , H02K21/22 , H02K7/09 , H02K39/06
CPC分类号： F16C32/0465 , F16C32/0442 , F16C32/0457 , F16C32/0476 , F16C32/0489 , F16C41/004 , F16C2360/42 , F16C2360/44
摘要： The rotary machine comprises a rotary shaft (2) supported by first and second radial magnetic bearings (5, 6) that are electrically controlled by a control device (13), said rotary shaft being fitted with an axial abutment device (100) comprising a rotor formed by a disk (101) secured to the rotary shaft (2) and interposed between first and second stators (102, 104) formed annularly around the rotary shaft and each including at least one annular coil (103; 105) controlled electrically by a system for servo-controlling the axial position of the rotary shaft. The stator (104) of the axial abutment device (100) further comprises a secondary induction circuit (106), and the disk (101) secured to the rotary shaft comprises a primary induction circuit (107) so that during rotation of the shaft, electricity is excited in the secondary induction circuit in order to supply energy to the radial magnetic bearings.
摘要翻译： 旋转机械包括由第一和第二径向磁轴承（5,6）支撑的旋转轴（2），其由控制装置（13）电控制，所述旋转轴装配有轴向邻接装置（100），该轴向邻接装置 转子由固定在旋转轴（2）上的盘（101）形成，并插入第一和第二定子（102,104）之间，环形地围绕旋转轴形成，并且每个包括至少一个环形线圈（103; 105） 用于伺服控制旋转轴的轴向位置的系统。 轴向邻接装置（100）的定子（104）还包括次级感应电路（106），并且固定到旋转轴的盘（101）包括主感应电路（107），使得在轴的旋转期间， 在次级感应电路中激发电力，以向径向磁轴承提供能量。
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