Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 301 - 350 out of 9,173

Document Document Title
WO/1996/038904A1
An electromagnetic actuator has four positions which are stable in the absence of a current and moves rapidly between these positions when acted upon by a current. The actuator has a thin, rotatable magnet (3) with two pairs of magnetic ...  
WO/1996/035255A1
A dual phase stepper motor is described, particularly for driving an indicator needle, of the type comprising a stator part formed by a main block (1) of a soft magnetic material connected to four magnetic cores (3-6) each supporting an ...  
WO/1996/030993A1
Terminals (4A, 4B) are secured to resin bobbins (1A, 1B) around which a coil is wound, external connecting ends (41A, 41B) are extended along an axial direction of a rotating shaft (7) of a magnet rotor (8), and fixing pieces (51, 93) th...  
WO/1996/024187A1
Low cost motors including specifically two pole (1, 51 and 101) and four pole (201, 251, 278 and 301) motors are provided with magnetically conductive stacked laminations (3 and 203) each having a multi-pole portion with a rotor opening ...  
WO/1994/023490A1
A brushless repulsion motor (10) in which the rotor (17) carried electronic switch circuits (22) for selectively shorting the rotor windings (19) at appropriate times in its rotational cycle. A noncontact reference signal source (24) on ...  
WO/1994/019855A1
A device for field weakening in a doubly-salient variable reluctance motor having permanent magnets (22, 24) in the stator (10). The field weakening increases the constant power range of the motor and is accomplished by controlled moveme...  
WO/1994/018743A1
A motor improved in the torque stiffness, and reduced in the resonance vibration when the motor rotates. The fixed magnetic poles each have two or more small teeth which are arranged at the same interval as the tooth pitch of the rotor. ...  
WO/1994/018745A1
A motor improved in the torque stiffness, and reduced in the resonance vibration when the motor rotates. The fixed magnetic poles each have two or more small teeth which are arranged at the same interval as the tooth pitch of the rotor. ...  
WO/1994/018744A1
A motor improved in the torque stiffness, and reduced in the resonance vibration when the motor rotates. The fixed magnetic poles each have two or more small teeth which are arranged at the same interval as the tooth pitch of the rotor. ...  
WO/1994/018742A1
A motor improved in the torque stiffness, and reduced in the resonance vibration when the motor rotates. The fixed magnetic poles each have two or more small teeth which are arranged at the same interval as the tooth pitch of the rotor. ...  
WO1994005073A3  
WO/1994/005073A2
A small, permanent magnet rotor, synchronous electric motor, suitable for use in, for example, a home appliance such as a refrigerator/freezer to drive a fan blade. The rotor of the motor is provided with two, axially displaced magnetic ...  
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/1993/022822A1
The stepper motor (66) comprises a multi-pole composite magnet (64), two stator members (65A and 65B) and means for positioning (60A, 60B, 60A' and 60B') the rotor and stator members. The composite magnet (64) comprises two sections (50,...  
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/1993/008634A1
A rotary electric machine constructed on the basis of a new operational principle, which is operated by using a magnetic repulsive force as its driving force and can be utilized as a motor, etc. In the rotary electric machine, provided a...  
WO/1992/022122A1
The present invention concerns a two-phase, stepping or synchronous motor. The rotor (6) includes five pairs of poles and the stator consists of two identical stator components (1, 2) made from a low retentivity material, each having two...  
WO/1992/016047A1
An apparatus for performing numerical control of a load at a high speed efficiently. The apparatus drives a linked load, as a DC motor, in the initial period of the movement of the load, and then, generates a braking torque to decelerate...  
WO/1992/010664A1
A rotaty actuator for adjusting the angle of rotation of adjusters, especially a throttle to determine the flow cross-section in a line for internal combustion engines, has an electric servomotor (15) with a two-pole stator (18) and a tw...  
WO/1992/010663A1
A rotating actuator for adjusting the angle of rotation of adjusters, especially a throttle to determine the flow cross-section in a line for internal combustion engines, has an electric servomotor (15) with a two-pole stator (18), a sta...  
WO/1992/010024A1
A miniature motor comprises a stator, a rotor (1), a bearing (3) for bearing the rotor (1) in a rotary manner, a rotor axis (2) which is coupled to said rotor (1), and electric connecting means (6) for electrically connecting the stator ...  
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/1991/003098A1
Motor-wheel characterized in that the movable part or rotor is arranged about the fixed part or stator and whereon is mounted a rim capable of receiving a conventional tyre or a tread. The motor has two free shaft ends which are used to ...  
WO/1990/016107A1
The invention relates to a monophase electromagnetic actuator which includes a rotor (1) with a cylindrical magnetized section (5) divided into two N poles transversely mangetized in alternate directions. The actuator also includes a sta...  
WO/1990/009058A1
A dielectric motor comprises a rotor (4) which is surrounded by one or more electrodes (2a-d) and which has an opening in the interior (5) containing one or more electrodes (1) about which the rotor (4) can move. Possible fields of appli...  
WO/1990/009057A1
The invention concerns motors in which the torque is produced not by magnetic fields but by dielectric forces. Fields of application are microelectronics and micromechanics. The rotors consist of several dielectrics (2a, 2b) arranged in ...  
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/1990/001231A1
A motor is disclosed comprising a housing (5) and a plurality of parallel stator laminations (4) mounted on the interior wall of the housing surrounding the rotor (3). The stator (4) comprises a plurality of coils (28) wound around the s...  
WO/1989/012194A1
An electric drive comprises a base (1), an electric motor including a casing (2) with a stator (3) and a rotor (4) mounted in it, a motion screw (5) and a limiter of the axial force, which is mounted between a supporting surface (12) of ...  
WO/1989/000785A1
The electric motor includes a mover (10), which may be a rotor or actuator, and a stator (12) having a number of poles (40-54) projecting toward the mover (10). The poles (40-54) have soft-magnetic teeth (58) projecting toward the mover ...  
WO/1988/002194A1
The present invention relates to a hybrid pulse motor. With the conventional pulse motors, it was difficult to decrease the thickness in the direction at right angles with the rotary shaft. According to this invention, teeth (14) are for...  
WO/1987/007784A1
Electrically-energized salient stator poles (40 to 54) of a variable reluctance motor terminate in stator teeth that oppose the rotor (10). Permanent magnets (110, 120) located between adjacent stator teeth and magnetized transverse to t...  
WO/1987/000986A1
The insulation between the exciter windings and the magnetisable material of the stator consists of a duroplastic or thermoplastic material of the linear polysulphone, fluorinated polymer or polyimide groups, so that the stepping motor c...  
WO/1986/003071A1
Stepping motor which is used for feeding paper and a typewriting base in a machine for office automation, such as a printer and a typewriter. A plurality of stator yokes (2), (3), (4), (5), are molded out of a resin unitarily to a predet...  
WO/1986/000765A1
The structure of the motor is as follows: a rotor (1) of which the N magnetization axes are parallel to the rotation axis (1a) and alternatively opposite; two stators, an upper stator (b), and a lower stator (a); each stator is comprised...  
WO/1985/005741A1
A stepping motor provided with a magnetic movable member (4) composed of an even number of regularly spaced first pole teeth (4a), (4b), etc.; a magnetic fixed member (1) composed of an odd number of at least three regularly spaced secon...  
WO/1985/005507A1
A stepping motor with toothed stator poles (40, 42, 44, etc.) and toothed rotor poles (36) is magnetically enhanced by locating permanently magnetized inserts (40) in the spaces between the stator teeth and magnetizing the inserts transv...  
WO/1985/004269A1
A permanent magnetic stepper motor (10) apparatus which provides high constant torque and constant speed through a large stepping angle under varying output shaft load conditions. The apparatus includes a rotor (12), a plurality of stato...  
WO/1985/000704A1
The structure of the motor is as follows: the rotor (1) has N magnetizing axes parallel to the rotation axis of the rotor, the adjacent poles having opposite names; the stator (2) forms m phases (r, s), m = N/2 x n, n being an integer; e...  
WO/1985/000705A1
The structure of the motor is as follows: the rotor (1) has N/2 pairs of poles which have alternate opposite names on each of its two faces; the poles of one face are directly facing those of the same name of the other face; two identica...  
WO/1985/000707A1
The structure of the motor is as follows: a rotor (1) has on each of both its faces N/2 pairs of poles having alternatingly opposite signs; the poles of one face are directly facing those of the other face and with the same sign; two sta...  
WO/1985/000706A1
The structure of the motor is as follows: the rotor (1) has N/2 pairs of poles at its periphery which have alternate opposite names; the stator (2) surrounds concentrically the rotor (1) and forms m phases (r, s), m = N/2 x n, n being an...  
WO/1984/001862A1
A magnetic motor has K stators (K = any integer) and preferably K + 1 rotors, with each stator (2) having 4n (where n = any integer) electromagnetic coils (7), and each coacting rotor (3) has p = (3/2)n permanent magnets (8) with their p...  
WO/1983/002042A1
The motor according to the invention comprises a disc-shaped rotor with multipolar permanent magnetization along an annular area and a stator comprising a plurality of magnetic circuits (9, 10,...) arranged so that the magnetic field is ...  
WO/1983/001156A1
The electric machine according to the invention comprises an iron-free rotor provided with two windings (1, 2) each of them being formed by a plurality of coil elements (11, 12, 13 and 21, 22, 23). The elements (11, 12, 13) of the first ...  
WO/1982/004363A1
The damping mass for stepping motors having uniform or unequal switching steps, is arranged on the motor shaft and has, during starting of the motor, a low inertia but still capable of damping mechanical and/or electric oscillations occu...  
WO/1982/003928A1
The rotor (6) of the stepping motor for a quartz watch is mounted on one single bearing, comprised by the ball bearing (3, 5, 8), wherein is engaged the medial portion of its shaft (1). On either side of this bearing, the shaft (1) carri...  
WO/1982/002291A1
Diphased stepping motor with axially magnetized rotor. This motor comprises two stationary magnetic circuits (4, 5) having each two branches of which at least one is coupled to an electric control coil (12, 13). The branches (6, 8) of ea...  
WO/1982/000929A1
The two polar parts (9 and 10) which extend respectively above an underneath the cylindrical permanent magnet (7) forming the motor part of the rotor, are each provided with a generally circular opening but which is profiled and limited ...  
WO/1980/002203A1
A polyphased stepping motor for the direct driving of the second or minute pin in a clockwork. The motor comprises a disc shaped rotor (1) axially magnetised so as to have 2N alternating poles and at least two stator members (2, 3) each ...  

Matches 301 - 350 out of 9,173