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JP2001078389A |
To simplify the structure of a stator and eliminate effects between magnetic levitation force and rotating torque by mounting the stator having a bearing winding of specific number of poles developing bearing force in an orthogonal direc...
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JP2001074049A |
To provide a magnetic bearing system easy to adjust a set value of a levitation control position of a levitation support body and capable of easily detecting deformation and abrasion of an auxiliary supporter for the levitation support b...
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JP2001057167A |
To provide a rotating anode X-ray tube including an axial bearing which is particularly suitable for the combination with a radially spiral slot bearing. In a conventional axial bearing generally having two tooth-like structures directed...
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JP2001056026A |
To provide a magnetic bearing system miniaturized by shortening length of an overall system in the axial direction of a rotor. Radial sensors 24b, 24f detect displacement in the radial direction in the Xs axial direction separated by an ...
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JP3135583B2 |
In a flywheel energy accumulator comprising a vertical shaft rotatably supported in a vacuum housing by superconduct ive magnetic axial support bearings, lower and upper flywheels are mounted on the shaft in axially spaced relationship, ...
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JP2001045707A |
To prevent friction between a bearing and a lock ring when a rotor is turned, by respectively mounting a first magnetic member in the vicinity of a tip end part of the rotary shaft and a second magnetic member in a lower side of the bear...
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JP2001041237A |
To provide a magnetic bearing device to reduce the number of partitems reduce a device cost, size, and power consumption by eliminating detection of the axial position and control regarding a rotary body. A magnet 37 for a motor, a motor...
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JP2001041235A |
To provide a small sized and low consumption power magnetic bearing device to generate a control force sufficient to a rotary body in all frequency bands and prevent the occurrence of touch down. By a groove slot 23 formed on the inside ...
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JP2001041238A |
To keep leakage of a magnetic flux generated at a joint to a minimum, in a composite type electromagnet consisting of a permanent magnet for bias having a joint between an electromagnet, having a control coil wound around an electromagne...
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JP2001041240A |
To prevent resonance by performing a digital filter process at a sampling frequency, and controlling an electromagnet based on a signal having a damped frequency range including a resonance frequency of a natural frequency and a rotation...
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JP2001041236A |
To provide a magnetic bearing device to be not high in an axial direction and formed into a compact manner, and favorable to high speed rotation. An upper axial magnet 29 is disposed on the inside in the radial direction of an upper radi...
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JP3135410B2 |
In a magnetic bearing apparatus, a rotating member (1) having an axis of rotation along the horizontal direction is supported by a pair of radial magnetic bearings (4,5) each including a plurality of electromagnets (4a,4b,5a,5b) in the r...
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JP3131671B2 |
PURPOSE: To reduce the number of electromagnets so as to reduce a cost and enhance reliability. CONSTITUTION: A magnetic bearing device comprises a rotating body 1 with tapered bearing surfaces 5, 6 facing reverse directions to each othe...
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JP3131619B2 |
This invention discloses a magnetic bearing device comprising a control coil (7) which supports a rotor (1) in vertical direction and a current controller which increases control current according to increase of clearance between the con...
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JP3130890B2 |
To automatically check the type of a magnetic bearing body and confirm and adjust parameters for controlling the magnetic bearing body. A magnetic bearing body 20 includes a machine type specifying resistor 412 and a body EEP-ROM 411 for...
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JP2001020950A |
To efficiently restrain a superconducting phenomenon caused by an irregular rotating magnetic field of a rotating part.A high temperature superconducting magnetic bearing is constituted of a fixed part 1 having at least a high temperatur...
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JP2001500955A |
(57) [Summary] Electromagnetic suspension with a pair of opposed electromagnets (3,4), each with at least one coil for applying suspension force to the rotor (2) to be suspended when power is applied. The device is disclosed. The control...
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JP2001012467A |
To provide a radial magnetic bearing of simple structure worked with a small number of current control power transistors.A stator 30 is formed by laminating magnetic substances such as silicon steel plates in a thrust direction and arran...
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JP2001008406A |
To reduce friction loss in a rotor/support device by arranging a magnetic bearing in at least one rotor rim and the region of pole coil winding for directly picking up the weight of the rotor, at a place where this weight is generated.A ...
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JP3121819B2 |
A magnetic bearing with permanent magnets for absorption of the radial bearing stresses and with a stabiliser is specified for a rotor, which stabiliser holds the rotor in a position relative to the stator such that it does not make cont...
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JP2001500200A |
The invention relates to a pot spinning device (2) having a spinning housing (16), a spinning centrifuge (11), which rotates at a high number of revolutions inside the spinning housing, as well as a rotatably seated centrifuge sheathing ...
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JP3114089B2 |
To prevent an evil influence caused by a conical or parallel motion of a rotor being apt to occur in the case of acceleration of the rotor. A three-axes control type magnetic bearing is provided with a radial position sensor 22 for detec...
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JP3114085B2 |
To prevent the interlocked rotation with a protective bearing by fixing a radial direction attracting electromagnet across a void at one end in the radial direction of a metal disk, and attracting the metal disk for a short time each tim...
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JP2000314421A |
To provide a combined dynamic pressure bearing capable of reducing the floating revolution number transferred to a dynamic pressure, while maintaining the dimension of the dynamic pressure bearing part small. In this combined bearing str...
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JP3109023B2 |
To prevent a harmful effect caused by the resonance of a conical mode and parallel mode being apt to generate at the acceleration time of a rotor stably. A bandpass filter is connected to PID control circuit in series to improve the rigi...
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JP2000298186A |
To provide a stage mechanism having a straight guiding accuracy of within 0.05 μm without being affected by the torque of a table drive screw nor causing yawing. Linear motion hydrostatic air bearings are provided parallel to each other...
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JP2000291655A |
To provide a rolling bearing for protecting a magnetic bearing capable of preventing increase in an internal clearance of a protected bearing when a temperature recovers its normal state by preventing a raceway ring mounted on the rotary...
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JP3099032B2 |
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JP2000283162A |
To provide a compact thrust magnetic bearing an overall outside diameter of which is contracted by reducing a magnetic potential difference of parts facing against each other in the diametrical direction. A stator 11 is arranged in close...
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JP2000277245A |
To prevent a supporting rod for supporting an induction heating mechanism from rotating, when a rolling bearing for the rod becomes rotation disabled. A rolling bearing 10 and a sliding bearing 14 are installed between the drive shaft 2 ...
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JP2000274433A |
To remove a rolling bearing without forming an impression on a raceway track of a bearing by forming an extending flange on an outer peripheral surface or an inner peripheral surface of the bearing, and arranging a jig engaging part in a...
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JP2000273724A |
To provide a bearing apparatus capable of surely supporting a spinning rotor especially during the cleaning of the spinning rotor by improving the bearing apparatus of the spinning rotor so as not to make a rotation noise. A support disc...
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JP3090977B2 |
A control method and apparatus for suppressing the vibration components of a magnetic bearing. According to this invention, a vibration wave is sampled at pulses synchronized with the rotation of a rotor, the vibration waveform sampled v...
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JP2000229125A |
To improve pumping efficiency by providing an impeller to a rotor held axially with a bearing using Lorentz's force and rotated magnetically, performing blood pumping by the rotation of the rotor and adjusting the position of the rotor w...
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JP3077919B2 |
PURPOSE: To increase the current density of a coil in an electromagnet by forming radial grooves in a thrust disc so as to cool the coil. CONSTITUTION: Ventilating holes 10 are formed on a thrust disc 2, in a circumferential direction at...
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JP2000220637A |
To extend the service life of a touch-down bearing by forming an indium film on at least the surface of a ball. An indium film 16 is formed on at least the surface of the ball 10 of a touch-down bearing 3. The indium film or other solid ...
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JP3068834B2 |
PCT No. PCT/EP88/01153 Sec. 371 Date Dec. 6, 1990 Sec. 102(e) Date Dec. 6, 1990 PCT Filed Dec. 14, 1988 PCT Pub. No. WO89/12178 PCT Pub. Date Dec. 14, 1989.A bearing for radially and axially holding a rotor with large radial dimensions a...
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JP3061168B2 |
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JP3058452B2 |
PCT No. PCT/EP96/01211 Sec. 371 Date Sep. 18, 1997 Sec. 102(e) Date Sep. 18, 1997 PCT Filed Mar. 20, 1996 PCT Pub. No. WO96/29775 PCT Pub. Date Sep. 26, 1996In a magnetically borne position-stabilizable flywheel, the force generation sys...
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JP3058451B2 |
In a magnetically mounted oscillation-damped flywheel, both the force generating systems (M1, M2) for the radial drive and transverse movement and the corresponding control sensors (SE1...SE4) are located in the wheel hub. Parasitic osci...
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JP2000508069A |
(57) [Summary] This device includes a reference ring (50) made of a non-magnetic and low-resistance material mounted on the rotor, a fixed coil arranged in the vicinity of the reference ring (50), and a power supply that supplies AC to t...
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JP3057047B2 |
To provide a suspension device to remove an unnecessary loss incurring due to an induced eddy current. A magnetic suspension device is provided with a rotor 10 to effect relative rotational movement along a given rotation symmetrical pas...
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JP2000161359A |
To provide a supporting structure of a rotary shaft which can eliminate the friction between a rotating side bearing member and a nonrotating side bearing member.A rotating side bearing member is composed of inside circular permanent mag...
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JP2000507335A |
PCT No. PCT/US97/04277 Sec. 371 Date Feb. 24, 1998 Sec. 102(e) Date Feb. 24, 1998 PCT Filed Mar. 19, 1997 PCT Pub. No. WO97/36361 PCT Pub. Date Oct. 2, 1997A method of damping resonances in a rotating system is disclosed, which includes ...
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JP3046533B2 |
To facilitate control and smooth rotation by a method wherein 2 pairs of opposite surfaces are arranged between a moving member and a fixed member, a ball is arranged between the recesses of the first opposite surfaces, a damping member ...
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JP2000145773A |
To provide high bearing rigidity with power saving, precisely holding a bearing in an intended position. This magnetic bearing device is provided with a rotating shaft 1, a fixed-side electromagnetic pole, a radial displacement sensor 6 ...
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JP2000145774A |
To always secure stable rotation by controlling the position of a rotor on the basis of output of a displacement detecting means and changing supporting rigidity of the rotor on the basis of output of a current detecting means of a motor...
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JP2000506248A |
(57) [Summary] In particular, the rotor device (10), which is a shaft suspended from the magnetic bearing device and has an active axial magnetic bearing (12), is carried on the shaft or the shaft with the axial shaft displacement sensor...
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JP3041342B2 |
The invention discloses a magnetic bearing device comprising a rotary main shaft (1), an armature disk (2) mounted on said rotary main shaft (1), and a pair of bearing elements (3) disposed on opposite sides in the axial direction of sai...
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JP2000097237A |
To relax an impact force applied to an auxiliary bearing at the time of touch-down by providing an urging means for applying a force in a predetermined direction to a rotating member when a power supply to a magnetic bearing device is sh...
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