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JP3717013B2 |
To prevent the excess current caused by an abnormality of a control system of a magnetic bearing device from being supplied to an electromagnet. A magnetic bearing device is provided with an electromagnet 6 to levitate a body 20 to be su...
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JP3711277B2 |
To provide a centrifugal extractor which makes it possible to obtain high reliability without causing problems of the corrosion and deterioration of parts, is free from maintenance and can operate for long hours even under the environmen...
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JP2005532516A |
The present invention provides a device and a method to enhance thrust load capacity in a rotor-bearing system. The load-enhancing device comprises a stator and a rotor arranged in such as way as to achieve a magnetic thrust load capacit...
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JP3710547B2 |
To rotate and drive a disk type rotor and make contactless attitude control possible between stators as magnetic bearing by giving a rotating and driving force to the rotor and providing a magnetic force developing mechanism for controll...
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JP2005273802A |
To provide a magnetic bearing device and a turbo molecular pump mounted with the magnetic bearing device capable of reducing the vibration by precluding deterioration in the controllability of a rotor shaft resulting from dispersion in t...
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JP2005530354A |
The invention relates to monodispersable, optionally magnetic particles containing one or more metals, optionally, protected by a secondary treatment with air, having an adjustable average particle size of between 2 and 15 nm and a narro...
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JP3701115B2 |
To provide a magnetic bearing control device that can stably float a controlled object with magnetic force even when frequency used by a state detector is reduced. This control device is equipped with an electromagnet 21 as a magnetic fo...
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JP3700032B2 |
PCT No. PCT/NL95/00379 Sec. 371 Date Aug. 27, 1997 Sec. 102(e) Date Aug. 27, 1997 PCT Filed Nov. 7, 1995 PCT Pub. No. WO96/15369 PCT Pub. Date May 23, 1996Piston compressor for compressing gas, comprising a frame with at least one cylind...
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JP3701307B2 |
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JP2005256954A |
To provide a liner guide and a feeding screw friction reducing method capable of using a low-priced ultrasonic vibrator and easily leading into a current machine tool even if design of a rolling guide element is changed at the minimum an...
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JP3694043B2 |
PURPOSE: To simplify the mounting and to eliminate the necessity of a huge investment by arranging a differential means of an input signal, to depend upon the operation of a peak limiting means, and by reproducing an input signal with an...
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JP3696398B2 |
To provide a hydrostatic magnetic composite bearing to have excellent dynamic rigidity of a hydrostatic bearing, rotation precision, and excellent static rigidity of a magnetic bearing and be formed in a compact manner and to provide a s...
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JP2005233189A |
To reduce vibration of a vacuum pump system and inside the vacuum pump system.In the pump system 400 equipped with an active magnetic bearing 490, the magnetic bearing 490 induces vibration in anti-phase with an unwanted vibration so tha...
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JP3686093B2 |
PURPOSE: To provide a back-up bearing for a magnetic bearing operating when a magnetic bearing device for supporting a rotation shaft against radially acting force and axially acting force, in particular, a magnetic bearing cannot approp...
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JP2005223977A |
To provide a motor fan in which the rotor will not move vertically downward, even if the motor fan is used, while being fixed facing down, and preventing shortening of its lifetime due to abnormal contact of the rotary shaft with the inn...
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JP3675010B2 |
PURPOSE: To obtain a superconductive bearing device which facilitates assembling of a magnet, prevents escaping of each circular permanent magnet and yoke of the magnet, increases magnetic field intensity due to the circular permanent ma...
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JP2005188735A |
To provide a magnetic bearing system to support the axial direction and the radial direction of a rotating machine, reduce machine wear and noise, occurring during operation, and besides extends the life of the rotating machine.Spindle i...
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JP2005188513A |
To provide a novel rotary type combustor usable as an engine for particularly driving an electric generator.The combustor comprises a fixed structure and an annularly circular cylindrical rotor supported by the fixed structure. The rotor...
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JP2005188921A |
To provide an innovative combustor of a rotary type comprising an annular rotor.The combustor comprises a stationary structure and at least one annular rotor supported rotatably around a shaft 4 by a contactless suspension means. The rot...
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JP2005188922A |
To provide an innovative combustor of a rotary type comprising a tubular rotor.The combustor comprises a stationary structure 2, the tubular rotor 3 supported rotatably around a shaft by the structure 2 by contactless suspension means 5-...
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JP2005192262A |
To provide a low vibration brushless motor by reducing axial vibration of a motor.The brushless motor comprises a bearing boss part having inner circumference secured with a bearing, a shaft held rotatably by the bearing, a thrust receiv...
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JP2005188644A |
To provide a size-reducible spindle motor capable of stably supporting a rotor, and a disk unit provided therewith.The spindle motor has a fixed shaft 50, a rotary sleeve 52, and an outer ring member 54. The rotary sleeve has an inner ci...
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JP2005171799A |
To provide an axial flow fluid machinery, for preventing contact of an outer member with an inner member in high speed rotation, while decreasing a flow rate of back-flow of gas by reducing clearance between the outer member and inner me...
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JP2005160294A |
To provide the magnetic bearing of a rotor shaft disposed opposite to a stator.(a) The rotor shaft (1) is provided with permanent magnet elements (2) adjacently disposed in the range of the stator (3). (b) The stator (3) is provided with...
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JP2005140190A |
To provide a power amplifying device which can linearize the relationship between input voltage and output current even within a minor range of the input voltage.Power amplifying devices 15, 16 comprise a current instructing device 17 wh...
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JP3643047B2 |
To provide a ceramic dynamic pressure bearing capable of preventing the occurrence of wear when starting and stopping. An electrode 30 for floating on a second member side and an electrode 40 for floating on a thrust plate side are forme...
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JP2005098176A |
To secure the smooth rotational driving of a control shaft by reducing friction force between the control shaft and a bearing section in an internal combustion engine in which the engine elements thereof are driven by the rotatingly driv...
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JP3636746B2 |
PURPOSE: To improve the cooling efficiency for a bearing, by allowing the air stream after cooling a rotor disc to flow to each gap on both the sides in the axial direction of the rotor disc, as for a device equipped with an axial magnet...
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JP3636939B2 |
To provide a magnetic bearing control device reducible in cost by reducing the applied number of current control power transistors. X-direction and Y-direction thrust commands FX, FY applied to a rotor 6 from thrust control circuits 17, ...
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JP2005083548A |
To provide a roller bearing device capable of semipermanently keeping the force generated in accompany with the relative motion of a plurality of raceway members, such as rotating torque, at a low level.An outer ring 1 and an inner ring ...
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JP2005504930A |
The invention relates to a machine (1), comprising a stator and a rotor (2) which is mounted with radially stable and axially unstable magnetic bearings (3, 4). Said magnetic bearings (3, 4) each consist of concentrically arranged magnet...
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JP2005502296A |
A system for supporting and rotating a rotary shaft includes a motor module 100 having a front annular bearing surface 120 at each end and a central rotary shaft 110 defining a conical region 130, and one end. A number having a front ann...
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JP2005501500A |
A turbo-generator machine for producing a supply of cooled air and a supply of electric power has a permanent magnet generator fixed to a shaft which is driven by a turbine rotor, the turbine serving to expand air which is supplied there...
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JP3610305B2 |
A delivery device for a single- or multiphase fluid having a tubular body for axially guiding the fluid, including a motor stator arranged outside the tubular body and a delivery element arranged within the tubular body, comprising a mot...
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JP2004346980A |
To reduce the rotating resistance and increase the durability of a radial needle bearing and increase the efficiency and the durability of a rotation support device for a planetary gear in which the radial needle bearing is assembled and...
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JP3599763B2 |
PURPOSE: To provide a magnetic support apparatus which can be manufactured at low cost without requiring any peripheral device by constructing the stabilizing device of the magnetic support apparatus from magnets disposed in pairs on bot...
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JP2004340361A |
To elongate the life of a product by generating repulsive force between a stator magnetic unit and a spindle magnetic unit for isolating a spindle a specified distance from a stator to prevent vibration and noise due to inclination.The m...
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JP2004331241A |
To relatively increase strength of left and right/upper and lower springs and improve characteristics of levitation force/guide force to improve performance of a magnetic levitation system applicable to a conveyance system for floating a...
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JP3591111B2 |
A second circuit B which is composed of a band-pass filter circuit (5) which takes out a rotating body position signal input from a sensor (1) while scarcely varying a phase within a range including a normal rotation frequency and a reve...
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JP2004308737A |
To provide a non-contact type bearing using respective ring-shaped magnets mounted in the axial direction.This non-contact type bearing structure is provided with a second ring-shaped magnet 3 at an outer side of a pair of first ring-sha...
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JP3578434B2 |
A dynamic-pressure gas bearing structure includes a sleeve (3), a column-like shaft (2) fitted to the sleeve (3), and a plurality of shallow grooves (21) formed on the outer peripheral surface of the shaft (2) and extending in the axial ...
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JP2004286045A |
To provide a magnetic bearing device, and a pump unit mounting the magnetic bearing device, in which position control to a rotary body is performed at high speed and with strong force, and in which vibration generated from the pump unit ...
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JP3563167B2 |
To reduce the manufacturing cost of a magnetic bearing device by providing a computation means which samples the signals converted by axial and radial A/D conversion means which differ in conversion time, in an order from the first to ha...
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JP3563705B2 |
To make a magnetic levitation device used in a magnetic bearing, etc., simple and inexpensive and to provide the magnetic levitation device by having a versatility in a control circuit part and separately designing a control circuit and ...
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JP2004239399A |
To provide a tapered roller bearing reduced in sliding friction.The tapered roller bearing comprises an outer ring having a track face on the inner peripheral part, an inner ring having a track face on the outer peripheral part, a roller...
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JP3554054B2 |
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JP3554070B2 |
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JP3550584B2 |
PURPOSE: To detect the displacement of a rotor without providing a displacement sensor. CONSTITUTION: A controller 82 estimates the displacement of a rotor 50 by performing operation from the currents Iu2, Iv2, and Iw2 of position contro...
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JP3546562B2 |
To provide an assembling jig used for a magnet part reinforcing structure for a superconductive magnetic bearing device and a mounting method for a magnet part reinforcing member for facilitating the shape dimension of a hoop suitable fo...
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JP2004521313A |
A system for measuring dynamic loads in a rotordynamic system having a rotor includes a magnetic bearing disposed around the rotor and having a plurality of magnets and at least one fiber optic strain gage associated with a pole of a res...
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