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5982055 |
Miniature motor
A miniature motor with a two-pole stator, and a rotor having three or more salient poles each having a core with flanges extending toward both sides thereof and a winding. The rotor is adapted to...
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5982060 |
Elevator machinery
The stator disc (18) of the motor (2) of a disc motor type elevator machinery is s provided with an annular cavity (19a) in which the stator (9) is placed. The stator (9) is attached to one of the...
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5982074 |
Axial field motor/generator
An axial field motor/generator having a rotor that includes at least three annular discs magnetized to provide multiple sector-shaped poles. Each sector has a polarity opposite that of an adjacent...
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5973435 |
Rotary electric machine having auxiliary permanent magnets
A rotor of an alternator having a plurality of claw poles, a plurality of auxiliary permanent magnets and a magnet holder for the permanent magnets. The magnet holder is composed of soft resinous...
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5973434 |
Armature for rotary electric machine having welded joint between upper and lower coil conductors
An armature coil is formed by welding upper and lower coil conductors each having a coil trunk, a pair of coil arms and a pair of coil extensions. Between an upper coil extension and a lower coil...
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5965967 |
Rotor for an electrical machine
A "claw pole" or Lundell rotor has permanent magnets included therein, each permanent magnet disposed between an adjacent pair of pole fingers. The permanent magnets each have a magnetization...
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5962948 |
Elevator motor with flat construction
An elevator motor (2) employing permanent magnets (30) attached in a circle on the surface (36) of the rotor disc (12). The rotor disc (12) forms part of both the magnetic circuit and the...
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5955807 |
Synchronous electric machine having auxiliary permanent magnet
A synchronous electric machine includes a stator having an armature winding, a rotor having axially laminated magnetic sheets and a field coil, a plurality of permanent magnets disposed in the...
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5955811 |
Electromagnetic rotary machine having magnetic bearing
A high speed electromagnetic rotating machine is arranged to avoid heat generation due to mutual inductance between a stator and rotor and has a stator provided with drive windings for generating a...
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5952757 |
Line start permanent magnet motor
An electric motor including a stator having a stator core, a start winding and first and second main windings is described. The first main winding and the start winding are configured to form a...
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5952764 |
Cage rotor having reinforcing members that prevent deformation of end rings at moderately high rotation speeds
In a cage rotor for an induction motor, a end ring (22) for connecting conductive rods (20) to one another is covered with a reinforcing member (24). The reinforcing member (24) is obtained by...
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5952758 |
Rotating electrical machine with excitation coils, by magnets or with double excitation
A rotating electrical machine including a rotor (2), the magnetic circuit of which carries excitation members, and a stator (16), the magnetic circuit of which carries a stator coil. The magnetic...
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5952755 |
Permanent magnet motor rotor
A permanent magnet motor rotor arrangement including a rotor core having radial and angular positioning surfaces provides for inexpensive and precise positional control of rotor components.
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5949172 |
Motor with salient pole having extending magnetic flux collecting plate
In the motor (1), when a drive coil (17) is wound around a salient pole (114), the opening width of an armature core (11) is kept sufficiently large to be able to wind the drive coil (17) properly...
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5945761 |
Switched reluctance motor
The clearance between the stator pole portions and the rotor pole portions at the axial central portion is larger than the clearance therebetween at the axial end portions. According to these...
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5942873 |
Permanent magnet type synchronous machine
In a synchronous machine, an armature structure has n (n being a positive integer) salient poles provided at predetermined circumferential distances around a rotary shaft and coils wound on the...
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5939813 |
Gap tube motor
The gap tube motor comprises a rotor, a stator and a gap tube which is arranged between the rotor and the stator, with at least two bearing apparatuses being arranged with a spacing in the axial...
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5939810 |
Rotor for synchronous motor
A rotor (10) includes a plurality of permanent magnets (14) disposed around a shaft (12) at generally equal intervals, and a plurality of laminated core members (16) disposed between the permanent...
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5936325 |
Synchronous type electrical machine
A synchronous electrical machine comprising a rotor and a stator, each having a plurality of notches, wherein the rotor is a stack of laminations without conductor windings and without permanent...
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5932941 |
Spindle motor and method of manufacturing the same
A spindle motor comprises a motor shaft, which is rotatably supported by a motor frame via a bearing and a hub, which is formed integral with the motor shaft for securing a data disk. The hub is...
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5929547 |
Rotor core having slots for receiving permanent magnets
A rotor for use in an electrical mechanism comprises a core in which there are formed first slots extending in a direction substantially perpendicular to a radius of the core. A plurality of second...
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5929548 |
High inertia inductor-alternator
A high inertia inductor-alternator energy storage device provides backup energy in a simple, compact device. The inductor-alternator stores an acceptable level of energy via an improved rotor that...
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5929550 |
Ventilated creepage blocks
A creepage block for a turbine rotor slot in which coil windings are embedded, wherein the creepage block is sandwiched between the windings and a wedge block, and wherein aligned radial cooling...
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5925964 |
Rotor for a rotating electric machine
The present invention prevents the degradation of the power generating efficiency of an alternating current generator by preventing the expansion of an air gap formed between pole cores and a...
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5925951 |
Electromagnetic shield for an electric motor
Electromagnetic shielding apparatus is provided for a motor having a rotor and a stator wherein the shielding apparatus is characterized by the absence of an electromagnetic shield in the stator of...
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5921148 |
Method for stabilizing a centrifuge rotor
A method to dampen vibrations of a centrifuge by restraining vertical movement of a disk rotatably attached to the centrifuge's drive shaft. Damping bearings contact with the disk to restrain...
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5923112 |
Laminated article comprising coupling elements of male-female type
A laminated article in particular for electrical use including mutually superposed metal laminations provided with elements or clips for connecting the laminations together. The clips project from...
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5907208 |
Rotor for an electric motor
A rotor for an electric motor, including a shaft (1), a lamination parcel (2) and a current distribution element (3), which are mounted on the shaft (1) coaxially therewith and for joint rotation...
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5903078 |
Rotary polygon mirror motor
A rotary sleeve 1 is integral with a rotary polygon mirror 14 forming a rotor section, one end portion of the rotary sleeve is formed into a magnet mounting section 15, on which a magnet yoke 3 and...
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5903080 |
Reluctance type synchronous motor
A reluctance type synchronous motor comprises: a stator with a plurality of slots placed at an even pitch angle wherein stored inside each slot is a stator winding for creating stator magnetic...
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5898253 |
Grain oriented composite soft magnetic structure
A soft magnetic structure substantially comprised of a plurality of magnetic field carrying particles molded and retained in a predetermined shape, bonded in that shape by an insulating binding...
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5894183 |
Permanent magnet generator rotor
A permanent magnet rotor for an electric generator or motor has a core lamination hub formed of a stack of generally round plates with peripheral slots for holding the first end of a rectangular...
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5893205 |
Rotor for a reluctance machine, and method of making
A reluctance motor rotor is formed by sandwiching a stack of thin ferromagnetic laminations between two end caps. Each lamination has a series of slots formed in it, with the ferromagnetic material...
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5889342 |
Motor cooling circuit
A cooling circuit for a motor which includes a rotor having a rotor shaft, and a core fitted on the rotor shaft and carrying a plurality of permanent magnets arranged on its outer circumference. A...
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5886450 |
Toroidal electrical motor/generator
An electrical motor includes a stator housing having a toroidally shaped inner cavity. A plurality of stator electromagnets are mounted along the cavity wall in a plurality of parallel helical...
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5886505 |
Apparatus and method for bringing on line a large synchronous condenser that cannot be started by an across the line start
A synchronous condenser has a rotor, a rotor shaft on which the rotor is mounted, and collector rings electrically connected to a source of D.C. voltage. A fluid drive has an output shaft connected...
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5886440 |
Electric motor with plural rotor portions having pole members of different widths
A motor capable of suppressing the torque ripple includes a rotor, a stator and stator coils. The rotor is provided with a plurality of permanent magnets which are arranged at a constant pitch in...
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5880543 |
Spindle motor having labyrinth seal
The invention relates to a structure of a spindle motor. The spindle motor comprises a housing assembly; a shaft fixed to the center portion of the housing assembly, a stator secured to the housing...
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5880547 |
Internal torque tube for superconducting motor
A rotor supporter for use in superconducting motors including first and second torque tubes secured between first and second rotor shaft ends and a rotor winding support wherein the support is...
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5877578 |
Rotor disc construction for use in an electrical machine
A rotor disc for use in an electrical machine has circumferential rotor rims mounted thereon. The rotor rim comprises a row of alternate magnets and pole pieces. The magnets are tapered at their...
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5877577 |
Electric hydraulic hybrid motor, control device and control method for the same motor
The present invention is an electric hydraulic hybrid motor, a control device, and a control method for the same motor, which is small in size and simple in construction, which can be equal...
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5869915 |
Electric motor for an X-ray tube
An electric motor for an x-ray tube of a medical imaging system is described herein. The electric motor includes a stator and a substantially cylindrical rotor. The stator includes stator winding...
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5866959 |
Cooling arrangements for rotating electrical machines
A rotating electrical machine has openings (105) in its stator teeth (101) occupying a substantial part of the surface area of each tooth so that the stator windings (103) have only a short thermal...
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5864198 |
Brushless generator
A brushless generator provides increased output by providing air-core coils (936,956) in place of ferrous coils in regions of the generator which operate at high frequencies. The air-core coils...
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5864191 |
Efficient permanent magnet rotor for brushless motor
An efficient permanent magnet rotor for a brushless motor has a yoke (2) formed by laminating many steel sheets (4) so as to provide an even number of magnetic poles projected externally, filed...
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5864192 |
Brushless motor with magnetic sensor to detect leaked magnetic flux
A brushless motor includes a stator and a rotor rotatably supported inside the stator. The rotor has a rotor yoke formed by laminating a large number of steel plates, the rotor yoke has an even...
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5864196 |
Rotor for a motor including non-magnetic plates laminated between silicon steel sheets
A rotor for a motor which can provide a great supply of mechanical power using only slightly more input power, because magnetization is sped up when the rotor is rotated by a rotating magnetic...
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5861699 |
Electric machine, in particular electric motor
Electric machine in which parts subject to magnetostrictive forces are sized and configured in a particular manner. Such parts (1) have radial dimensions that vary along the axial direction. The...
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5861700 |
Rotor for an induction motor
A rotor for an induction motor includes a core having a central hole extending axially therethrough for receiving a shaft. A plurality of large spaces are formed in the core radially outside of the...
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5847484 |
Sleeve type of coreless motor with reduced starting current
According to the present invention, a coreless motor is provided, which comprises: a stator having a circular slot therein, magnets on a wall of the slot, two brushes attached thereto, and metals,...
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