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Patent Searching and Data


Matches 1,251 - 1,300 out of 16,095

Document Document Title
WO/1990/009051A1
An under-the-hub spin motor (8) for a disk drive includes a shaft (12) having a first portion (12a) mounted to a support member (10) and a second portion (12b) having first and second bearings (26) provided at the first and second ends t...  
WO/1990/007220A2
An electronically switched synchronous motor drive designed as a linear or rotary actuator has an actuating element formed by a slidably or rotatively mounted permanent magnet and a stator formed by a winding. The winding is formed by at...  
WO/1990/003686A1
A brushless motor improving the structure for connecting the stator coil to the substrate to facilitate the operation of connection and assembling. The constitution comprises a rotor having a rotor magnet (11), a stator core (2) on which...  
WO/1990/003031A1
A recording/reproducing apparatus used, for example, for a computer, and particularly an apparatus for recording desired data on a recording medium such as a floppy disc and for reproducing data. The recording/reproducing apparatus is re...  
WO/1990/002437A1
An electric motor with solely one direction of rotation and electronic speed control, includes two mutually rotatable parts with ferromagnetic cores (1, 2) separated by an air gap (6). The state core (1) is provided with a peripherally e...  
WO/1990/001823A1
A high efficiency electronically commutated reluctance motor that is characterized by less iron losses than conventional switched reluctance motors. Preferably, the motor operates without flux reversal in the motor member which supports ...  
WO/1990/000325A1
A reluctance motor comprises a stator (11) with poles (1, 1'; 2, 2'; 3, 3') which are co-operating in pairs, and a rotor (12) made from soft magnetic material and having poles (13) which are disposed diametrically opposite each other in ...  
WO1989011523A3  
WO/1989/012925A1
Servo-driven motors are fitted with a tacho generator in which the radially arranged magnetic-pole pairs of a rotor generate, in radially arranged, meander-shaped coil windings mounted on a circular plate, a voltage which is dependent on...  
WO1989011148A3  
WO/1989/011751A1
An electric machine, in particular an electric machine capable of being switched by electronic components, has a permanent-magnetic excitation part (22) and an induction part (2) provided with electroconductors (10), both parts being mov...  
WO/1989/011523A2
Electronic rotor position sensing means is disclosed for a multi-phase permanent magnet DC motor (110) having windings (W1, W2, W3) on a substrate (124) of low magnetic permeability. Means for sensing the voltages in the windings are use...  
WO/1989/011750A1
A work generating device (10; 33) comprises a movable working part (12; 35) which is driven by an electric motor (11) and which during a working cycle has a varying need of torque including at least one maximum value. The motor (11) is a...  
WO/1989/011148A2
In order to enable a tape drive machine to be constructed in a housing (30) with low height, a hub (36) which in operation projects from a drive motor (34) into a tape cartridge (10) is retractable into the motor (34) to permit the cartr...  
WO/1989/008346A1
An electric machine (2) comprises a first functional part (4) with an excitation system (12) and a second functional part (6) with a conductor system (10). The first (4) and second (6) functional parts can be moved relative to each other...  
WO/1989/007305A1
A device for remote transmitting of rotation angle and torque between a driving and driven shaft in which a driving and a driven synchronous machine (1, 2) are kinematically connected through their shafts (3, 4) to position pick-ups (9, ...  
WO/1989/005537A1
An electric motor (1) has a fastening flange (10), a plastic or soft metal bearing support (7), and a stator (23) which is fastened to the periphery of the bearing support (7). A toothed disk (24) made of metal with projections (26) dire...  
WO/1989/002670A1
An armature (10) for a DC motor includes a plurality of circumferentially spaced armature segments (12) having salient poles with arcuate surfaces (12a) and air pockets (12f) formed within the poles adjacent to but not intersecting the s...  
WO/1989/002671A1
A permanent magnet rotary dynamo electric machine (10) such as a high speed three phase brushless motor has at least one stator (16) and at least one rotor (11) spaced apart from one another by a cylindrical gap (28) therebetween. A plur...  
WO/1989/000358A1
An adjustable speed inductor type rotating dynamoelectric machine (2), capable of high speed operation, employs a stator assembly (4) incorporating a spool-like support structure (10). A central, generally cylindrical portion (12) of the...  
WO/1988/009079A1
The reduction gear (6) is fastened to the body (1) of the electric motor including gear, and the motor stator is fastened to the removable electronics part (13) of the body. The motor rotor (7) is connected to the gear with an input shaf...  
WO/1988/007783A1
A two-phase rectifier electric motor comprises a stator (1) with power windings (2, 3) of different phases and a rotor (6) consisting of a permanent magnet with poles (7) on its active surface which faces the power windings (2, 3) and ma...  
WO/1988/007285A1
A brushless D.C. motor is provided with a stator (1) and a rotor (2) incorporating an annular magnet (9) provided with arcuate steel flux return strips (10). A hall effect device (5) acts to sense the angular position of the rotor magnet...  
WO/1988/006781A1
The invention consists of an in-spindle disk drive motor incorporating a novel two-piece aluminum spindle (36) and a method for fabricating the same. The spindle (36) is hollow and contains a removable steel flux sleeve (44) on which pla...  
WO/1988/006369A1
In a starter/charger (100) of an engine disposed between an engine main body (13) and a clutch (16), the present invention stores the principal portion of the clutch (16) in a recess formed in an axial direction on the end surface of a r...  
WO/1988/006370A1
A clutch plate (30) is fitted to a crank shaft (8), rotating field poles (27a, 27b) are fixed to this clutch plate (30) and a magnetic gap (d) is defined between the outer peripheral portion of a pair of field cores (28a, 28b) clamping a...  
WO/1988/006376A1
Electric motor comprising a rotor (1), a stator (2) and at least two pole pairs. One particularly preferred application of the electric motor according to the invention is small-size accurate servomotors of high capacity. At present the ...  
WO/1988/006377A1
A field coil is split into a plurality of sections which are connected in parallel with the battery for starting and are connected in series for generating the power after the engine is started. Thus a sufficiently large field magnetomot...  
WO/1988/006375A1
Electric machines of transverse flow design have the advantage that small pole pieces with an armature winding can be executed with very low losses. This enables high force densities to be reached. The present application provides improv...  
WO/1988/006372A1
A field core (11) and an armature core (4) are fitted directly to a cylinder block (31) and a clutch plate (33) which is frictionally coupled with a clutch disk (26a) is fitted to a rotating field pole (2a) fixed to a crank shaft (8) of ...  
WO/1988/005975A1
The stator electromagnets (80', 82', 84', 86', 88', 90') face inward about the rotor cavity (12) of the motor. Spaced horseshoe magnets (70) with spaced apart, opposite poles face outward about the periphery (22) of the rotor (20). The s...  
WO/1988/004787A1
A rotary device for use as a precision element such as an optical scanner. The device comprises a rotor (12; 62) which includes a driven element such as a polygon (14; 64) having a plurality of mirror surfaces thereon, means (18; 63) for...  
WO/1988/002192A1
A brushless D.C. motor, suitable for use as a hand-held surgical tool, includes a field of self-supporting coils (19) arranged between a pair of impregnated fiberglass epoxy sheets (23) situated in an air gap formed by a rotatable shaft ...  
WO/1987/007419A1
A system for remote transmission of the angle of rotation and of the force between driving and driven shafts conprises a driving and driven synchronous machines (1, 2), pick-ups (9, 10) for detecting the positions of the shafts of which ...  
WO1987002527A3  
WO/1987/004576A1
A magnetic rotary device comprises first and second rotors that are arranged in parallel close to each other, and that are rotatably supported. The first and second rotors are coupled to each other so as to turn in the opposite direction...  
WO/1987/003648A1
Machine as described with an armature winding (14) composed of at least two winding lengths (15, 16) forming at least one symmetrical multi-phase winding, in which each winding length (15, 16) is separated into two mutually magnetically-...  
WO/1987/003049A1
A cross-flow cooling fan device provided within electric appliances which require cooling, such as an audio amplifier, a microcomputer, a word processor or a copier. This device has a vane wheel, a metal bottom plate surrounding the bott...  
WO/1987/003149A1
A cross-flow cooling fan device provided within electric appliances which requires cooling, such as an audio amplifier, a microcomputer, a word processor or a copier. In this device, a vane wheel (107) having air-blast slits around the p...  
WO/1987/002527A2
The device for automatic control of direct current motors is characterized in that one armature current control unit (10) is mechanically attached to the motor rotor so as to rotate along with it and receives positive and negative DC sup...  
WO/1987/001879A1
The electric control circuit required for operation of an electric motor is mounted on a circuit board (15), which is subsequently fitted externaly to the back of a flange (2) serving to hold the stator (5), the electric motor being othe...  
WO/1987/001251A1
A brushless motor comprising a rotor which consists of a magnetic member or a permanent magnet, a stator having a stator core and a plurality of coils, a non-contact sensor for detecting the position of the rotor, speed detector means, e...  
WO/1987/001247A1
In a d.c. motor, the stator may form the armature and has its windings (2a, 2a1, 2B, 2b1, 2c, 2c1) inserted in slots in its cylindrical surface and the rotor may comprise a permanent magnet or be provided with d.c. windings (4a, 4b). Swi...  
WO/1987/000362A1
A pump, particularly for aquariums, is provided with an electric motor, a gyroscope driven by the electric motor, a water inlet manifold and a water outlet manifold connected to the gyroscope. The electric motor has a diametrically polar...  
WO/1986/006564A1
A pulsating current electromotor without commutator comprises a permanent magnet type or electromagnetic type rotor (11) keyed on a rotating shaft (12) and having the poles (14-18) diametrically opposite to one another relative to the sh...  
WO/1986/003629A1
A brushless motor comprising a magnetic rotor core (5) which has a plurality of rugged magnetic pole teeth maintaining a predetermined angular pitch, a stator core (1) consisting of a magnetic material which is opposed to the rotor core ...  
WO/1986/001049A1
Slotless and toothless wound stators are produced for electrical machines, in particular brushless DC motors, by providing temporary teeth at opposite ends of an iron cylinder (17) with smooth inner wall end-to-end, placing an electrical...  
WO/1986/001050A1
Signal processing units are more and more widely used as portable apparatuses or susceptible of being installed in very compact units. It is therefore necessary to obtain a face-to-face dimension which is further reduced and a decrease o...  
WO/1985/003958A1
A device for driving a sewing machine in which a brushless electric motor is used to drive the sewing machine, the brushless motor having a rotor made up of permanent magnets, and permitting the current-carrying phase of the stator windi...  
WO/1985/002951A1
A reluctance motor with windings for one or more phases, and arranged - for each phase - around two or more poles (3, 4, 5, 6). The stator (1) surrounds a rotor (2) incorporating two or more rotor poles (11). The invention is characteriz...  

Matches 1,251 - 1,300 out of 16,095