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Patent Searching and Data


Matches 901 - 950 out of 15,982

Document Document Title
WO/2001/052384A1
A brushless DC motor (58) providing higher power density and efficiency with increased tool run time. The motor (58) includes a rotor assembly (72) having a permanent magnet (74) affixed to a shaft (76). A plurality of coils (94) for pro...  
WO2001002724A8
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/2001/052388A1
A hybrid synchronous motor comprising a rotor and stators, wherein the stator has at least one assembly (7) having a structure in which ferromagnetic rings (2, 3) formed with teeth on the both inner peripheral edges and outer peripheral ...  
WO/2001/052390A1
This invention is a back EMF permanent electromagnetic motor generator and method using a regauging process for capturing available electromagnetic energy in the system. The device is comprised of a rotor with magnets of the same polarit...  
WO/2001/051883A1
A low cost Hall position sensor comprises a standard surface mount Hall effect sensing device (2) having its three leads (4, 6, 8) soldered directly to an exposed electro-conductive end portion of a standard flexible multiconductor circu...  
WO/2001/048893A1
A motor includes a rotor, a stator facing to the rotor, a motor-base-assembly for journaling the rotor and holding the stator. The motor-base-assembly is made of resin and includes a motor-base having openings and terminals made of metal...  
WO/2001/045248A1
The invention concerns a method which consists in supplying a first alternating signal to one end of at least a stator winding, at a specific frequency, and in recovering a measurement signal at the other end of said winding, said measur...  
WO/2001/045237A1
A direct current electric motor (20) has the following features: a housing (22), a stator (34) being affixed to the housing (22); a reduced inertia rotor (36) being located in a central cavity of the stator (34). The rotor (36) includes ...  
WO/2001/045236A1
The invention relates to an electronically commutated motor with a stator that carries at least two winding phases that can be subsequently exposed to a current, and a permanent-magnet rotor. The magnetic poles of the stator are subdivid...  
WO/2001/045235A1
An electronically controlled permanent-magnet electric motor comprises a stator (2, 3) with one or more excitation coils (4, 5) for creating a main magnetic field (F¿1?), a rotor (6) with permanent magnets (10, 11) mounted rotatably ins...  
WO/2001/043259A1
A permanent magnet type motor with a permanent magnet, capable of reducing vibration and noise without lowering the motor efficiency, which comprises a stator (1) having multi-phase stator windings, and a rotor (10) disposed inside the s...  
WO/2001/042653A1
An apparatus and method for a centrifugal pump (10) for pumping sensitive biological fluids which includes (i) an integral impeller and rotor (21) which is entirely supported and rotated magnetically by electromagnets (52, 54), (ii) a pu...  
WO/2001/043261A1
A motor includes a motor-base-holder which comprises a base (3101), a bearing supporter (3151) vertically protruded from the base for supporting a bearing, (3200) a stator supporter concentric with the bearing supporter for being mounted...  
WO/2001/040111A1
A micromachine including at least one bladeless rotor (10), said rotor being adapted to impart energy to device energy to or derive energy from a fluid. A rotor for a micromachine comprising at least a pair of closely spaced co-axially a...  
WO/2001/041288A1
A novel low cost limited angle torque DC brushless servomotor is disclosed. The motor itself is a modified standard low cost DC brush motor which is modified by removing the brush assembly and substituting in its place an appropriately c...  
WO/2001/038741A1
A conventional fluid pump, in particular, for the cooling/heating circuit of a motor vehicle, comprises a claw-pole stator and an impeller rotor, which is submerged in a liquid and separated from the claw-pole stator by a tube. The numbe...  
WO2000057541A3
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/2001/037401A1
A brushless motor used, e.g., as a blower motor for vehicle air-conditioning systems. The brushless motor has a holding member (16) holding a rotor (1) and a stator (2). The holding member (16) is held by a flange member (19) through vib...  
WO/2001/037418A1
The invention is a variable motor (1) having reduced audible noise. This advantage is achieved by reducing or eliminating ripple torque by making the individual phase torques follow a certain profile, so that when the torques are summed,...  
WO1999025057A8
The present invention relates to an electric motor which is intended for a motor-wheel such as those used in low-power vehicles. The motor comprises solenoids (7) which are mounted on a stator (1) as well as magnetic members (6) which ar...  
WO/2001/033698A1
A fluid-cooled switched reluctance motor comprising a stator (50)having a plurality of evenly spaced, radially oriented, like stator poles that define a gap (58) between adjacent stator poles (56). The stator poles have side walls (56a) ...  
WO/2001/033688A1
The invention relates to a synchronous motor with an electronic control for adjustment devices to be used in motor vehicles, especially for adjustment devices with an anti-trap protection and/or an excessive force limitation. According t...  
WO/2001/031766A1
A transverse flux motor having multiple stator phase windings which are electronically commutated to produce a rotating flux to drive a permanent magnet rotor (2) located externally of the stator (7). The stator (7) is formed by two comp...  
WO/2001/028076A1
An external rotor brushless DC motor is disclosed having a Hall effect sensor (6A) for providing a rotor position signal indicative of the angular position of the motor's rotor assembly relative to the motor's winding assembly. A base pl...  
WO/2001/028074A2
An external rotor brushless DC motor for use in a fan, or other similar application, the motor comprising: a stator assembly base having a base plate(21); a number of stator windings (7) affixed to the stator assembly base; and circuitry...  
WO/2001/022558A2
A connector module (11) for an electric motor is in the form of first and second contact ball-bearing assemblies (12, 13) mounted coaxially about the motor shaft (5) in a single plane, such that a first component (15) rotates with respec...  
WO/2001/020351A1
A method for measuring a rotary position of an electric machine includes reading a pulse counter (11) that counts a sequence of pulses. The sequence of pulses are related to the rotary position. A determination as to whether a new pulse ...  
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...  

Matches 901 - 950 out of 15,982