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JP4018981B2 |
The device comprises a) a rotor which can rotate or rotates about a rotational axis and b) at least one magnetic suspension bearing, in which the rotor can be or is mounted in a contactless manner and which comprises at least one super-c...
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JP4017383B2 |
Magnetic bearing control device comprising: a rotor (103); position detecting means (105b,107b,109b); magnetic bearing means (105a,105b,107a,107b,109a,109b); an exciting circuit including switching elements; electromagnetic detection mea...
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JP2007309371A |
To provide a rotation supporting device whose load on a thrust bearing can be reduced for reducing electric power required for rotation drive even if the weight of a rotated object mounted to a cargo box is greater. A motor 15 and a perm...
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JP2007532821A |
A magnetic axial bearing arrangement in a reciprocating hermetic compressor, comprising: a cylinder block ( 20 ) and a radial bearing hub ( 40 ); a crankshaft ( 50 ) securing a rotor ( 61 ) of an electric motor ( 60 ), said arrangement c...
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JP4005654B2 |
In order to enable speedy and simple exchanging operation of impeller and casing by eliminating setting operation, a sensor output when the impeller is not floating is measured by an automatic neutral position setting circuit at the acti...
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JP4005670B2 |
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JP4001403B2 |
This invention relates to a rotatable assembly for supporting the rotor (3) of a vacuum pump in which there is provided a plurality of gas pumping stages formed by cooperating rotor disks secured to said rotor by stator rings integral wi...
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JP3994323B2 |
To provide a gravitational-load-reducing device for a vertical rotation- shaft for increasing stability of wind-mill blades, achieving the light weight and miniaturization of the structure of a vertical rotation shaft, bearings, and the ...
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JP3994343B2 |
Since disruptive forces can be continuously exerted upon a rotor during a pulsatile flow through a pump with a magnetically mounted rotor (permanent magnets and addition control current coils), it is necessary to adjust position i.e. mod...
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JP3984464B2 |
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JP3983808B2 |
PCT No. PCT/DE96/02229 Sec. 371 Date May 11, 1998 Sec. 102(e) Date May 11, 1998 PCT Filed Nov. 19, 1996 PCT Pub. No. WO97/19273 PCT Pub. Date May 29, 1997A magnetic bearing for contactless support of a rotor in relation to a stator, with...
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JP3978982B2 |
A DSP (Digital Signal Processor) ( 15 ) controls at least a magnetic bearing ( 23 ), and compares the accumulated actual work time of a managed component counted by a counter ( 14 ) with a preset maintenance time. The DSP ( 15 ) outputs ...
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JP3960638B2 |
To provide a sliding door, in which the defect of a known device is avoided, which can be opened and closed easily, in which lubrication is hardly required and which is installed and adjusted simply. In the sliding door with a guide sect...
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JP3961032B2 |
PURPOSE: To constitute a magnetic bearing device with magnetic force for radially and axially resetting a rotor shaft when shifted from a target position, in such a way that a shielding current generated in superconducting structure is n...
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JP3949916B2 |
To provide a magnet bearing device or a magnetically levitated motor, which can achieve miniaturization by combining a radial magnet bearing or a motor with a thrust magnet bearing, by using the bias magnet flux of the combined magnetica...
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JP2007518464A |
A pump ( 10 ) includes a housing ( 14 ) having a fluid inlet ( 26 ) and a fluid outlet ( 28 ). A rotor ( 12 ) is disposed within the housing ( 14 ) and rotatable about an axis ( 16 ) to move fluid from the fluid inlet ( 26 ) to the fluid...
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JP3930170B2 |
To provide a circulation fan device which enables maintenance free performance without contaminating process gas even when the circulation fan is under high speed rotation and high load states, and save installation space. A rotor of a c...
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JP3923696B2 |
To provide a substrate spinner suited for treating large-aperture substrates, where the occupied space efficiency of magnetic bearings can be improved, electromagnet targets and sensor targets, i.e., the rotor components of magnetic bear...
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JP3920947B2 |
To provide a designing method for a high temperature superconducting magnetic bearing part suitable for manufacture of a high temperature superconductivity-applying device having optimum magnetic levitation characteristics and magnetic s...
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JP3919436B2 |
To provide a magnetically levitated rotating machine capable of stably detecting the displacement and the rotational frequency of a rotor and allowing an entire device to be made smaller and compacter than it was before. The magnetically...
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JP3901897B2 |
To provide a magnetic bearing device applying magnetic bearing, having a structure that at least a displacement sensor is protected by a nonmagnetic metallic material, and capable of controlling the levitation with high accuracy without ...
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JP2007507193A |
To provide a motor without bearings which can reduce the noise level of the motor, extend the life of the motor, and reduce the production cost. A motor 100 includes a stator 104 arranged in a frame 102 and a rotor 106 arranged in the fr...
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JP3888552B2 |
Disclosed is a spindle motor for hard disk drives capable of generating mechanical and electrical preloads to form a predetermined sized air gap through use of mechanical and electrical offsets, so that the spindle motor is prevented fro...
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JP2007014187A |
To provide a magnetically fixed motor which increases radiation effects, retains the safety of fan operation and without sharply increasing costs.The magnetically fixed motor includes a base 8, a stator 7 set to the base 8, a rotor 6 tha...
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JP2006528322A |
First (2) and second (3) permanent magnets take a ring shape and are encased in a ring-shaped/annular carbon fiber binding band (5). The permanent magnets are separated at several points (4) with a clearance. These points form slots to e...
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JP3847796B2 |
A vacuum pump has a back-up bearing assembly for allowing its rotor to spin down safely without damaging the pump if the primary bearing system becomes disabled. The drive shaft of the rotor is tubular and contains the back-up bearing as...
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JP3840182B2 |
The invention relates to a magnetic bearing (2) for magnetically suspending a rotating shaft (3) within a stator. Said magnetic bearing comprises a first bearing element (5) rigidly linked with the shaft which is enclosed by a second bea...
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JP2006522693A |
A drive unit for a granulator, in particular an underwater granulator, includes a rotor that is, or can be, connected to a cutting blade of the granulator. The unit is equipped with an electric motor for driving the rotor and radial bear...
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JP3828582B2 |
A power supply device for providing uninterrupted power for a period of time is disclosed. The power supply device has a controller and a flywheel device. The flywheel device has a housing that contains a flywheel rotor and a motor/gener...
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JP3814651B2 |
A vacuum pump is provided with back-up bearings in addition to magnetic bearings for supporting its rotor with respect to the pump housing. The rotor has a hollow rotary shaft extending backwards enclosing in its inner space a forwardly ...
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JP3811769B2 |
A vacuum pump a the magnetic bearing assembly includes the magnetic bearing assembly with rotor position sensors and backup bearings being placed inside the rotatable shaft of the vacuum pump. The sensor placements are independent of the...
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JP3798013B2 |
A fluid pump with a rotary impeller is disclosed which comprises an electromagnetically-driven, bearing-free, seal-free rotary impeller levitated by localized opposed, magnetic forces and by fluid forces, or by localized opposed magnetic...
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JP3790883B2 |
To provide a magnetic bearing system capable of easily magnetically levitate a body of rotation to an about mechanical central position. A body 5 of rotation is magnetically levitated by magnetic attraction force of plural pairs of elect...
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JP3791948B2 |
To reduce current drain from the power supply by efficiently using the power supply to a coil by turning on one of coils in turning off the other coil in modulation of a pair of coils arranged in a magnetic bearing. Current in an electro...
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JP3785096B2 |
To support a rotation shaft without axial loss by keeping a permanent magnet in a ring shape and by equalizing the circumferential distribution of a magnetic field in rotation. The permanent magnet 4 is composed of a plurality of segment...
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JP3786803B2 |
To apply a controller to a plurality of kinds of machine bodies by moving a rotor in a static state in the predetermined direction to determine a moving amount to a movement limit position, judging the kind of magnetic bearing on the bas...
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JP3786420B2 |
PCT No. PCT/EP93/03540 Sec. 371 Date Sep. 13, 1995 Sec. 102(e) Date Sep. 13, 1995 PCT Filed Dec. 15, 1993 PCT Pub. No. WO94/16235 PCT Pub. Date Jul. 21, 1994The invention relates to a rotationally symmetrical1 magnetic bearing cell (1) w...
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JP3784116B2 |
To provide a superconductivity applied device which can attain a stable magnetic levitation force characteristics or magnetic lifting force f2J characteristics as esigned. Magnetic levitation force characteristics obtained by making a di...
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JP3782606B2 |
To provide a magnetically levitated system for detecting the temperature of an object of control and ensuring safety drive of the system without the need for special maintenance or requiring special structures or special manufacturing st...
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JP3776162B2 |
To stably levitate a disc type impeller magnetically by applying the constitution that two radial shafts of the disc type impeller are controlled with a non-control type bearing, while the radial shafts in an axial direction being active...
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JP2006087298A |
To provide the method for position control of the rotary part material supported by a permanent magnet.When a pulsating fluid flows in a pump provided with a magnetically supported rotor, as continuously interfering force acts on the rot...
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JP2006510182A |
A apparatus processes an object ( 19 ), such as a semi-conductor wafer at accurately controlled positions. The object ( 19 ) is supported by a working platform ( 12 ) that is moveable along a path. A suspension actuator part ( 14 ) attac...
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JP3754671B2 |
The invention relates to a magnetic bearing assembly of a rotor in a stator, with at least one magnetic bearing (1) comprising a stator part (2) and a rotor part (3) arranged coaxially thereto in the operating position without contacting...
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JP3753923B2 |
To provide a small-sized and inexpensive magnetic bearing control device with simple constitution capable of operating a motor in low noise. In the magnetic bearing control device provided with a pair of opposite electromagnets for float...
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JP3736100B2 |
To meet a request for high-speed cutting work by determining the outside diameters of respective rotors in the rotating parts of the first and second radial bearings. The main spindle is composed of a front part including a rotor 4 (outs...
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JP2005344874A |
To provide a magnetic bearing device which can be reduced in circuit scale and cost.A differential signal from a sensor circuit 2B is converted into a digital value by an A/D converter 301, prior to be input to a DSP 307. A sampling freq...
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JP2005537467A |
To create a high-sensitivity non-contact sensing system based on magnetic levitation of an inertial mass. An inertial sensor based on the magnetic levitation of an inertial mass includes an active magnetic bearing unit arranged to levita...
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JP3723593B2 |
PURPOSE: To provide a friction pump of Siegbahn type or Holweck type which can be operated at high number of revolution and can suppress a clearance between a rotary member and a stationary member to be small. CONSTITUTION: A friction pu...
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JP3725027B2 |
A pump assembly 1, 33, 200 adapted for continuous flow pumping of blood. In a particular from the pump 1, 200 is a centrifugal pump wherein the impeller 100, 204 is entirely sealed within the pump housing 2, 201 and is exclusively hydrod...
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JP3722874B2 |
PURPOSE: To improve an air supply device for a vacuum pump which has a high speed rotor and which uses a magnetic bearing, without increasing the manufacturing cost. CONSTITUTION: In an air supply device for a vacuum pump which has a hig...
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