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Patent Searching and Data


Matches 951 - 1,000 out of 16,042

Document Document Title
WO2000060724A8
The system includes a permanent magnet three-phase motor and an electronic current controlled inverter by pulse width modulation. The motor has twenty-two poles and twenty-four slots, three phases and a cylindrical outer rotor. This stru...  
WO/2001/013494A1
An insulated winding stack provides a structure on which phase windings can be wound in their proper position. The phase windings and winding stack are incorporated as a unit into the electromotive device. A stator formed with the insula...  
WO/2001/013498A1
A permanent magnet electric motor which is highly efficient and has good startability. The permanent magnet electric motor includes a stator (20) having an annular stator ring (22) of magnetic material and stator salient poles (24) dispo...  
WO/2001/011755A1
The invention relates to an electric axial flow machine comprising an ironless disc-shaped rotor (1) which is arranged on a machine shaft (2), and comprising two stators (3, 4) which are arranged next to the rotor (1). The rotor (1) comp...  
WO/2001/010002A2
The present invention is directed to a high speed spindle motor comprising a stator assembly including a stator having multiple conductors that create a plurality of magnetic fields when electrical current is conducted by the conductors ...  
WO/2001/008287A1
A generator which cancels out a magnetic force generated in an armature-side windings (2) with respect to a magnetic pole (3) in a magnet field system by making equal the number of normal turns to the number of reverse turns for windings...  
WO/2001/006617A1
A rotating electric machine comprises a rotor provided with a permanent magnet, and a stator with magnet wire wound on a core. The magnet wire includes a stranded wire consisting of two or more enameled wires. The magnet wire, having a l...  
WO/2001/002758A1
The invention concerns an electromechanical acting element comprising an electronic control and power unit for powering a driving unit (12) including powering means (40, 60) and motion transforming means (41-42, 61-62) and adapted to mov...  
WO/2001/002724A1
A blood pump (500) preferably has a magnetically suspended rotor (502) that rotates within a housing (506). The rotor (502) may rotate about a stator (504) disposed within the housing. Radial magnetic bearings (560) may be defined within...  
WO/2001/003275A1
An electric motor includes a plurality of coils (28) through which passes a ring rotor (24) having a plurality of magnets (26) supported thereon. The inner circumference of the rotor includes teeth (40) for engaging with a plurality of g...  
WO/2001/001548A1
An electric motor with rotor being a drive wheel (1). The drive wheel (1) has one or more permanent magnets (2) attached to said drive wheel (1) with opposite magnetic poles adjacent to one another. One or more electromagnets (6) are att...  
WO/2000/074207A1
An electric motor having a pancake construction stator and rotor poles that are formed by photolithography. The stator (22) and rotor (22) can be formed from an amorphous material, thereby reducing grain boundaries and allowing smaller p...  
WO/2000/074218A1
An electric motor having a pancake construction stator poles (44) and rotor poles (46) that are formed by photolithography. The stator (22) and rotor (20) can be formed from an amorphous material, thereby reducing grain boundaries and al...  
WO/2000/074205A2
The invention explains principles and circuits for the power control of two-phase SR-Machines featuring a direct recovery of the phase switch-off energy and a 180° phase angle at full load. The power control relies physically on a short...  
WO/2000/072427A1
A motor includes a stator having a plurality of teeth on which windings are provided, and a yoke connecting the teeth, as well as a rotor having permanent magnets and facing to the stator via an air-gap. The air-gap at a tailing section ...  
WO/2000/065338A1
A levitated rotor (340), neutrally buoyed in ultrasound transmission fluid, moves to position and aim an ultrasound transducer in up to five servo-controlled coordinates of position and tilt rotation. Stator drives/sense windings drive t...  
WO/2000/064036A1
A brushless motor comprises a stator (3) with an armature coil (11) wound on it, a rotor (5) capable of rotating inside or outside the stator (3), a ring magnet (24) and a sensor unit (25) which detect the position of the rotor, a motor ...  
WO/2000/062405A1
The invention relates to an electronically controlled electric motor comprising coils (5) which are arranged in a stator (2), are located opposite permanent magnets (4) of a rotor (3) and which serve as position sensors (6). Said coils (...  
WO2000022715A9
A two-phase switched reluctance motor comprising a stator (10) having an even number of evenly-spaced, like stator poles (24a-24l) defining a gap (28) between each stator pole, windings (32) for each of the two phases wound around the st...  
WO/2000/060726A1
A 3-phase brushless motor which includes a rotor which has permanent magnets so as to provide P pieces of magnetic poles (wherein P is an integer not smaller than 2) and a stator which has a plurality of coils arranged into, for instance...  
WO/2000/060724A1
The system includes a permanent magnet three-phase motor and an electronic current controlled inverter by pulse width modulation. The motor has twenty-two poles and twenty-four slots, three phases and a cylindrical outer rotor. This stru...  
WO/2000/058976A1
The invention relates to a method for determining the position of a moveable element (2) in at least one main pole air gap (3) of a polarized electromagnetic actuator (1), comprising a stator structure (4) in the form of a magnetic circu...  
WO/2000/057539A1
An electric motor having a snap-together construction without the use of separate fasteners. The construction of the motor removes additive tolerances for a more accurate assembly. The motor is capable of programming and testing after fi...  
WO/2000/057536A1
An electric motor having a snap-together construction without the use of separate fasteners. The construction of the motor removes additive tolerances for a more accurate assembly. The motor is capable of programming and testing after fi...  
WO/2000/057538A1
A discoidal brushless DC motor having a stator (507) carrying windings (503) arranged in slots which radiate out from the centre of the stator to the periphery. The depth of each slot increases towards the centre of the stator. The slot,...  
WO/2000/057541A2
An electric motor having a snap-together construction without the use of separate fasteners. The construction of the motor removes additive tolerances for a more accurate assembly. The motor is capable of programming and testing after fi...  
WO2000030238B1
The present invention relates to an electric machine presenting a constructive base form that enables said machine to be used both as a motor and as a generator and to provide a high yield of the air-core coil on the smallest area possib...  
WO/2000/055852A1
A disk drive is provided with a balancer having a hollow circular section (14) that accommodates a magnetic body (13), a clamper (10) that rotates integrally with the disk (1), a magnetism generating device (272) that generates a magneti...  
WO/2000/051224A1
A permanent magnet D.C. motor (90) includes a stator assembly (112) with a plurality of upstanding discrete spaced-apart core components (116) formed in a circular locus generally parallel with the motor axis. Each core component include...  
WO/2000/051229A1
An electrical rotating apparatus comprises an inverter system (18) that outputs more than three phases. The apparatus further includes a stator comprising a plurality of slots and full span concentrated windings, with the windings being ...  
WO2000017987A3
The present invention provides an improved DC electric starter-generator having high starting torque, compact size and weight, increased efficiency and reliability, and being particularly suitable for a starter-generator for aircraft eng...  
WO/2000/048296A1
An actuator comprising control means disposed in a housing and adapted for controlling the rotation of a rotary shaft through drive means, rotary shaft displacement detecting means disposed in the housing and adapted for detecting the ro...  
WO/2000/048289A1
A brushless motor comprising a stator which has 3n (n is an integer of 2 or more) magnetic poles formed in positions at which the circumference is equally divided into 3n sections and each provided with a columnar part projecting inward ...  
WO/2000/048006A1
The invention relates to a sensor which measures the angle of rotation or rotational speed and which comprises a pulse generator that is situated on a rotational element (10). Said pulse generator has a ring magnet (11) which is fabricat...  
WO1999041829A3
A constant-power brushless DC motor is provided, including a stator which is wound in parallel by phases and polarities and configured of n multi-phases, a rotor having a predetermined number of polarities, which is required to concentra...  
WO1999060692A3
An energy conversion magnetic circuit is constituted with magnet pole pieces of magnets or armatures which are in parallel with respect to the shaft to obtain a dynamic force or an electromotive force. The magnetic circuit for a generato...  
WO/2000/042696A1
An electric motor, a wheel, and drive apparatus for an electric vehicle are described and claimed. One aspect of the described invention is drive apparatus for an electrically powered vehicle, the drive apparatus including: a motor compr...  
WO/2000/041607A1
A magnetic induction drive for a rotatable driven member in a sealed housing, in particular, a shaft-mounted blade in a blender cup or a shaft-mounted blade in an ice shaver, uses a comparatively thin circular drive plate of a magnetizab...  
WO/2000/036727A1
A low-noise motor with a compensated moment of engagement is created with an electrically commutated stator and a permanent magnet rotor by means of specially configured stator air-gap surfaces, whereby said air gaps are provided at leas...  
WO2000010240A3
The speed of an electric motor (9) is regulated by means of a controller (6) that is provided with a setpoint value based on a characteristic function (23). The characteristic function (23) calculates a setpoint value for the controller ...  
WO/2000/031860A1
The aim of the invention is to produce sheet steel bodies for electrical rotating machines consisting of a base body, a rotor shaft and a laminated rotor body having permanent magnet excitations and coils which are arranged in grooves; s...  
WO/2000/030238A1
The present invention relates to an electric machine presenting a constructive base form that enables said machine to be used both as a motor and as a generator and to provide a high yield of the air-core coil on the smallest area possib...  
WO/2000/028656A1
A system for controlling a rotatable device, the system comprising a controller and a rotary device, which has a stator and rotor, wherein the controller is connected to the rotary device to control rotation of the rotary device, and whe...  
WO/2000/025409A1
A three phase switched reluctance machine (10) including a rotor (40) having both wide poles (54) and narrow poles (44), with a narrow pole (44) on each side of a wide rotor pole (54). The rotor poles being dimensioned such that the narr...  
WO/2000/022715A1
A two-phase switched reluctance motor comprising a stator (10) having an even number of evenly-spaced, like stator poles (24a-24l) defining a gap (28) between each stator pole, windings (32) for each of the two phases wound around the st...  
WO/2000/021189A1
The invention relates to an electronically commutated motor (M) which has a galvanomagnetic rotor position sensor (40) for generating rotor position signals. A timer (CNT_HL) serves to achieve a premature commutation which occurs once th...  
WO/2000/019587A1
A brushless motor includes protective means having a simple mechanism for protecting electronic components and so forth provided on a control board against both static electricity and heat of a heat sink. A protective member is provided ...  
WO/2000/017987A2
The present invention provides an improved DC electric starter-generator having high starting torque, compact size and weight, increased efficiency and reliability, and being particularly suitable for a starter-generator for aircraft eng...  
WO/2000/011776A1
The invention relates to an electric motor such as the one described in document EP0 433 479 Al, namely a so-called brushless DC motor, having a stator with a hub and first stator pole teeth extending radially outwards therefrom with exc...  
WO/2000/010240A2
The speed of an electric motor (9) is regulated by means of a controller (6) that is provided with a setpoint value based on a characteristic function (23). The characteristic function (23) calculates a setpoint value for the controller ...  

Matches 951 - 1,000 out of 16,042