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Patent Searching and Data


Matches 1,151 - 1,200 out of 16,015

Document Document Title
WO/1994/005074A1
In a brushless DC motor of a radial gap type, one of a pair of vertical (right and left) pole teeth (Xx, Yy) is formed in such a manner as to possess a smaller gap in a circumferential direction than the other, and the position of this p...  
WO/1994/005075A1
In a brushless motor which includes a stator (26) and a rotor (1) rotatably supported inside the stator and wherein the rotor has a yoke (2) formed by laminating a large number of steel sheets (4), the yoke has an even number of magnetic...  
WO/1994/003779A1
An apparatus for position detection using signal patterns created by use of a fixed disk having three conductive patterns disposed thereon. The first and second patterns are annular conductive paths which are coaxial with respect to one ...  
WO/1994/001920A1
A brushless motor which includes a stator (9) and a rotor (8) rotatably supported inside the stator. The rotor has a rotor yoke (10) formed by laminating a large number of steel plates, the rotor yoke has an even number of magnetic pole ...  
WO/1994/001917A1
An electric motor-wheel including a hollow shaft with a first opening at a first end thereof and a second opening at a second end thereof, wherein said first opening receives conductors from outside the motor-wheel; a stator coaxial with...  
WO/1994/001919A1
A fault-tolerant reluctance motor has a multiphase stator winding. The stator (2) has a different number of poles from the rotor (5). The lead angle and the pole angle beta, betar) embraced by each stator and rotor pole (3, 5) is at leas...  
WO/1994/000903A1
The present invention relates to an apparatus having spaced permanent magnets (24, 54, 56) positioned so there is a magnetic interaction between them, and controlling the interaction by having a coil (26, 28, 30, 32, 34, 36, 38) in the s...  
WO/1993/024983A1
The invention concerns an electric machine whose windings (85) are connected to controllable semiconductor valves (101), in particular of the power-transistor type, the windings (85) also being in heat-exchange contact with a fluid-coola...  
WO/1993/024955A1
The proposal is for a fluid-cooled power transistor arrangement, the semiconductor component (1) of which is arranged on an especially boardlike insulating substrate (9) via a metal electrode (7). The flat side of the semiconductor compo...  
WO/1993/023918A1
A variable reluctance drive system including a motor and corresponding converter for improved current commutation. The motor incorporates a salient pole rotor (16) and a salient pole stator (10) having one or more full pitch windings (20...  
WO/1993/023266A1
An electric car equipped with a battery power source, a motor and a controller and having a construction wherein a filler (15) seals a gap between a motor case (11) and a motor cover (12); a portion connecting the motor (6) with the case...  
WO/1993/022820A1
The present invention is related to a rotor position detecting apparatus for a brushless motor enclosed in a housing. The apparatus comprises a plurality of light reflecting members attached to the surface of a rotor of the motor in the ...  
WO/1993/019510A1
An electronically switched small-power motor operated with a d.c. voltage network has a plate-like stator (10) and a disk-like rotor (11) with axially magnetized magnetic poles. In order to reduce the speed of rotation in an optimal mann...  
WO/1993/017484A1
A pump specially designed for aggressive or environmentally hazardous materials contains a pump wheel, the shaft (8) that carries the pump wheel, and the rotor (12) of an electromotive drive (4) inside a hermetically sealed housing (10)....  
WO/1993/015513A1
A motion producing device using permanent magnets (22) as the source of energy including one or more permanent magnets (22) at least one having a coil (24) mounted on it, and an electric circuit for connecting the coil (24) to a source o...  
WO/1993/015550A1
A reluctance motor, which has a small diameter, a high rotating speed and a high efficiency, or which has a large output torque, little vibration and, if necessary, which can be regeneratively braked. The rotor of the reluctance motor is...  
WO/1993/015547A1
In a rotational/linear brushless DC motor/generator the rotor/slide (100) has many equally spaced permanent magnet poles (101) of alternating polarity and it has no or little magnetically permeable iron parts. These magnets (101) cover t...  
WO/1993/013585A1
A flat brushless motor for generating vibration used as a paging means of a portable communication device such as a radio pager. The flat brushless motor has a back yoke (5a) of which the center of gravity is deviated from the center of ...  
WO/1993/012573A1
The present invention relates to doubly salient reluctance machines (DSRMs) including switched reluctance machines, stepping motors and hybrid stepping motors. To improve the utilisation of the machine windings and associated electronic ...  
WO/1993/011597A1
A structure of the terminals of a brushless motor, which enables the motor to be thin and enables the windings of the motor to be connected to a circuit base board easily and automatically. The brushless motor comprises a rotor section, ...  
WO/1993/010593A1
A brushless DC motor, whose stator (10) is a combination of stator yokes (11, 16), a bobbin (14) on which a magnetic field coil (15) is wound and to which terminal pins are provided, and a base plate (20). The stator (10) is fixed to the...  
WO/1993/009550A1
The composite magnet of the present invention comprises two pieces (60, 61) of permanent magnet material formed into a complementary pattern of holes and projections. The two pieces are magnetized in opposite axial directions. The two pi...  
WO/1993/007672A1
A rotary field motor comprises a relatively coarsely toothed stator (1) in which is located a rotor (4), to the casing surface of which are fitted individual permanent magnets (5, 6). The special feature of the rotor (4) is that the perm...  
WO/1993/005564A1
A variable reluctance motor (20) having improved means for detecting the relative position of the rotor (34) and stator (32) during rotation of the rotor whereby signals may be employed to commutate the motor, comprising sensed means on ...  
WO/1993/005216A1
A brushless DC motor-driven spindle assembly (10) for a textile ring spinning frame wherein a shaft for rotatably supporting a bobbin for yarn collection is mounted for rotation about a central axis of rotation in a bolster section (18) ...  
WO/1993/005568A1
Method and apparatus for closed-loop microprocessor control of an electric motor (20) having one or more phase windings (40) and commutation of the phases by rotor/stator position sensors to provide improved efficiency in motor operation...  
WO/1993/004520A1
A direct current electric fan motor (90) according to the present invention employs a circular fan housing (92) forming the circular fan rotor opening (94) and a circular fan rotor recess (100). Curved elongate electrical coils (124) hav...  
WO/1993/001644A1
A flat coreless DC motor having a large output torque and high efficiency at high speeds. The three-phase flat coreless DC motor comprises flat armature coils, and a disc-like rotary armature, or a fixed armature. The flat armature coils...  
WO/1992/022121A1
An electromechanical transducer, such as a motor (1), comprising a rotor member (4), a stator member (3) having an electrical winding (8), and isolating means (11, 9, 16, 12) isolating at least a part (18) of one of the members (3) from ...  
WO/1992/022059A1
In known head drums, the rotating part has optically readable markings which produce impulses for electronic switching, servo control or head switching. The aim here is to simplify the process for producing such markings and reduce the e...  
WO1992011682A3  
WO/1992/020080A1
A miniature electric motor (100) is provided including stator (110) and rotor (130) assemblies wherein the rotor assembly (130) has a magnet (134) and a shaft (138) adapted to be coupled to a load to move the load and wherein the magnet ...  
WO/1992/018344A1
Described is an electric motor for an electric vehicle, the motor having a rotor (13) and a stator with a lamination bundle (11) containing slots designed to hold current conductors which are connected to each other via coil ends. The mo...  
WO/1992/011690A1
An apparatus is provided that comprises a DC motor and a controller adapted to control the motor. The motor has a permanent magnet rotor and an electromagnetic stator. The rotor is divided into three permanent magnet sections which are s...  
WO/1992/011682A2
An electronically switched d.c. machine, in particular a d.c. motor, has a permanent magnet rotor with a substantially cylindrical annular gap (35) having a homogeneous magnetic field with rectilinear, radially extending lines of electri...  
WO/1992/010022A1
A switched reluctance motor driven by a polyphase source includes a stator (3) having a yoke (6) and a plurality of evenly spaced salient poles (9, 10) distributed about the yoke (6) and a rotor (1) mounted for rotation relative to the s...  
WO/1992/007411A1
The invention concerns a synchronized stator-energized motor or generator with lamellar sectorial stator elements (SS1 and SS2) located one behind the other a certain longitudinal distance apart and each energized by an energizer winding...  
WO/1992/007412A1
A brushless DC motor related to the first invention is characterized in that rotary pole surfaces (14, 15, 16 and 17) of rotor magnetic poles (8, 9, 10 and 11) are respectively formed on convex surface, and the rotary pole surfaces (14, ...  
WO/1992/006530A1
High torque brushless motors are proposed which have low weight and high efficiency. The permanent magnet rotor has many equally spaced poles of alternating polarity. The stator has a plurality of pole groups, each pole group have a plur...  
WO/1992/005627A1
A three-phase reluctance motor with a large output torque used to drive various pieces of industrial equipment, wherein two adjacent magnetic poles (16a and 16a') and two magnetic poles (16d and 16d') faced to the above magnetic poles in...  
WO/1992/005618A1
The electrical machine described has an induction component (12) with electrical windings (10) and an exciter component (14). Located between the induction component (12) and the exciter component (14) is an air gap (28). The induction c...  
WO/1991/020120A1
A dual voltage direct current permanent magnet brushless motor operated by sequential and alternate pulses to two rows of stator coils (3, 9) radially and equally positioned in the stator (5) assembly to interact with two rows of permane...  
WO/1991/018440A1
On the basis of the interpretation, without preocupation, of the concept of "motor" as a fundamental and genuine interaction between electromagnets, all the problems have been solved by full control effected by varying the arrangement of...  
WO/1991/018206A1
The present invention relates to a pump assembly of displacement-type, comprising a pump housing (1) having a pump housing chamber (14) with inlet and outlet conduits (13, 17) for the pump medium, pump rotors (19) in said pump housing ch...  
WO/1991/016755A1
A device for at least partially driving a vehicle, such as a golf buggy, a trolley, or a parcel carrier, which is adapted to be pushed or pulled by an operator in a forward or a reverse direction is disclosed. The device comprises (a) a ...  
WO/1991/015892A1
The method includes fabricating a plurality of elongated high permeability flux carrying members (86), and preparing n wire bundles (84) each having a predetermined length. The n wire bundles (84) are wound to provide a distributed windi...  
WO/1991/014308A1
A disk drive motor having a low profile, with a gas-lubricated deflecting pad support (32) usable in the motor and elsewhere, includes a cup-shaped rotor (10) having an integral cylindrical portion (12) extending from the base of the cup...  
WO/1991/011842A1
A co-axial cylindrical brushless DC motor (10) has an internal cylindrical stator (16) and an external rotor (11) containing permanent magnets (27). The cylindrical stator has a substrate of reinforced plastics covered by several layers ...  
WO/1991/009449A1
A slotless, brushless, large air-gap electric motor (10) comprises a stator (14) having a field winding (22) and field backiron (24), the field winding being composed of a plurality of successively offset polygonal shaped turns so as to ...  
WO/1991/009442A1
The invention is directed to an extremely low loss, low cost construction for magnetic flux return paths which may be utilized in electrical or electromechanical devices which include a changing magnetic fields. The magnetic flux is dire...  

Matches 1,151 - 1,200 out of 16,015