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WO/2000/060728A1 |
The present invention pertains to the field of electrotechnical engineering and essentially relates to motors in which the rotor rotates under the action of a packet of external electromagnetic cartridges and windings of the core. It is ...
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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...
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WO/2000/046909A1 |
The invention aims at simplifying the structure of a rotary actuating drive, especially for a wave guide regulating switch comprising a permanent-magnet rotor (7) and several stator windings (1, 2, 3) surrounding the rotor in the form of...
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WO/2000/045501A1 |
The present invention relates to a generator of energy as a dynamo-electric machine with employment of the parallel and superposed forces, of 'artificial electromagnetic reaction' between the primary (2) and secondary (3) and of 'natural...
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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...
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WO2000003471A9 |
A stepper motor (9) having first and second metallic rotor assemblies (12A and 12B) being positioned within a hollow concentric passage (16) created in a permanent magnet (15) formed as a hollow cylindrical sleeve extending between the f...
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WO/2000/014851A1 |
A synchronous multiphase rotary electrical machine (30) comprising in one preferred embodiment, a stator teeth (34) grouped into two or more sets. Each set (34) is associated with an armature winding (36) wound in a plane perpendicular t...
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WO/2000/005803A1 |
In a stepping motor combination to be disposed on a mounting part each stepping motor is provided with a number of electrically controlled coils, cooperating with one or more core parts, and a magnetic body rotatable with respect thereto...
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WO/2000/002728A1 |
The invention relates to an engraving member pertaining to an electronic engraving machine used to engrave printing forms. The engraving member consists of a shaft (6) that oscillates around the longitudinal axis at low angles of rotatio...
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WO/1999/064937A1 |
A stator (1) comprises a first stator portion (1a) and a second stator portion (1b), which consist of high-permeability material and are united by welding with low-permeability or nonmagnetic connections (1c, 1d) interposed. The stator i...
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WO/1999/053599A1 |
The present invention pertains to the field of electrical engineering and essentially relates to motors with a rotating action, more precisely to motors in which the rotor rotates under the action of a set of outer electromagnetic coils ...
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WO/1999/050952A1 |
A three-phase stepping motor (1) comprising a rotor (3) having rotor pole teeth (31) at a constant pitch (P1) and stator pole teeth (22) opposed to the rotor pole teeth (31) at a stator pole (21), wherein (n) sets of tooth groups (23) co...
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WO/1999/048190A1 |
The invention relates to a multi-phase transverse flux machine, comprising a stator with substantially U- and I-shaped cores (1, 2) made of a soft-magnetic material and a stator winding (3) for each phase which generates a magnetic flux ...
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WO/1999/041571A1 |
A shaft drive has a printed circuit board device (1, 1'), a rotor device (50; 5, 51) with a rotor (5) and a rotor shaft (51) arranged thereon, and a stator device (40) for driving the rotor (5) with the rotor shaft (51). It also has a mo...
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WO/1999/040674A1 |
A hybrid stepper motor having optimized torque per unit volume or 'torque density' comprises a stator having an outer diameter and an inner diameter, and a rotor rotatably position within the stator inner diameter and being drivably coup...
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WO/1999/019961A1 |
A brushless synchronous rotary electrical machine comprises stationary stator windings (80, 86) and toroidal inner windings (54, 56). The toroidal inner windings (54, 56) are stationary helical windings, concentric with the rotor shaft (...
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WO/1999/005769A1 |
An electronic commutated claw pole motor has an exterior rotor (42) with a shaft (40) and a rotor magnet (62). Said claw pole motor contains a stator (64) which has a first soft ferromagnetic stator pole piece (74) located on its opposit...
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WO/1999/001924A1 |
Electrical machines operating according to the reluctance principle have toothed air gap surfaces between their moving and fixed parts. The magnetizability of these teeth directly affects the performance of the machine. According to the ...
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WO/1998/050998A1 |
A motor comprising two or more rotors (20, 30) rotated by means of a common power supply (6), each rotor (20, 30) having a plurality of poles (22, 32) and being associated with a stator (16, 26) having a plurality of poles (18, 28), wher...
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WO/1998/038724A1 |
A connection structure which increases a connection workability between a stepping motor and a circuit board, and which does not change the structure of a main body of the stepping motor, whichever side the circuit board may be located i...
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WO/1998/038725A1 |
An Ni-Cr high-permeability material which contains 37.5 % - 38.5 % of nickel, 7.7 % - 8.5 % of chromium, 52.5 % - 54.5 % of iron, and 0.1 % - 1 % of the total of silicon and manganese is used as the stator material in order to maintain t...
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WO/1998/024169A1 |
A stepping motor in which the rotation of a rotor (22) composed of a permanent magnet can be suppressed in an excellent state even when no drive signal is supplied to exciting coils and which is provided with open loop-like exciting coil...
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WO/1998/024167A1 |
Within a switched reluctance electric motor stator, poles (4A, 1, 3A, 6, 2A, 5, ...) are arranged so that two by two adjacent stator poles are magnetically joined to a stator pole pair (4A, 1; 3A, 6; 2A, 5; ...). The value of the ratio o...
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WO/1998/019072A1 |
A bearing that can restrict consumption of a lubricating oil without increasing a frictional resistance of a rotary shaft and can therefore improve its durability, and a motor that uses such a bearing. The motor mainly comprises a stator...
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WO/1998/019384A1 |
A stepping motor in which windings can be easily and independently wound around the annular bobbin of each annular stator core while conducting terminals are prevented from becoming obstacles to the winding work. The stepping motor is pr...
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WO/1998/008290A2 |
A brushless synchronous rotary electrical machine comprises stationary stator windings (76) and 'rotor' windings (70). Only the rotor (54) moves. The rotor winding (70) is a stationary helical winding with the rotor shaft (42) and attach...
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WO/1998/005113A1 |
A stepping motor such that the smoothness of rotation of the rotor is improved. The width W0 of each of magnets (41, 42) in the axial direction of the rotating shaft satisfies the relation W2 > W0 > W1, where W1 is the distance where pai...
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WO/1998/005114A1 |
A stepping motor such that the smoothness of rotation of the rotor is improved. A first annular stator (1) is made up of an inner yoke (14), an outer yoke (13) and an annular bobbin (12) around which a coil is wound. A second annular sta...
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WO/1998/001932A1 |
A reluctance machine including a plurality of phase windings where each phase winding comprises a plurality of fractional-pitched coils. The reluctance machine may be coupled to a drive that can energize one, two or more of the phase win...
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WO/1997/049164A1 |
A stepping motor capable of improving the accuracy of a step angle is provided, which is formed by providing a magnet rotor (3) having a plurality of magnetic poles on a circumferential surface thereof, arranging in a piled state a pair ...
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WO/1997/048173A1 |
The characteristics of a stepping motor are improved by preventing the positional deviation between the internal and external yokes of the motor with a simple structure. The stepping motor (1) is constituted of a stator (2), a rotor (6) ...
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WO/1997/047069A1 |
A stepping motor includes a cylindrical rotor (2) having a plurality of magnetic poles (1) with alternately opposite polarities on its periphery; and a stator having two-phase yokes (11, 12) with pole teeth (13, 14, 15, 16) opposed to th...
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WO/1997/047075A1 |
The present invention relates to a piezoelectric linear step motor which comprises a cylindrical body (1) and a mobile part (4) as well as fixation units mounted between them. The fixation units comprise at least two piezoelectric units ...
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WO/1997/023943A1 |
The present invention relates to a two-phase motor formed by a stator part (1) excited by electric coils and a magnetised rotor (2). The rotor (2) has N pairs of poles which are radially magnetised in alternate directions, N being equal ...
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WO/1997/021266A1 |
Low cost multi-pole motor construction (125) and related methods of manufacture are disclosed. The economic advantages inherent in the construction and manufacture of C-frame motors, including modified and improved C-frame or twin bobbin...
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WO/1997/015108A1 |
A switched reluctance machine (10) includes a first element (12) having a plurality of uniform poles (18A, 18B, 18C, ...) and a second element (12) having a first pole (22A, 22C) and a second pole (22B, 22D). The first pole has a wide fa...
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WO/1997/014209A1 |
An electrical machine such as a generator or motor includes a rotor portion (47, 49), a stator portion (44, 51) and a field circuit (42, 50) for generating a magnetic flux associated with one of the rotor portion and the stator portion. ...
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WO/1997/013317A1 |
Projections (15a), semi-projections (16a), and recesses (18a) all having a width of an electrical angle of 120� are provided to the periphery of a conductor disk (15) which rotates synchronously with a motor. A coil (10a) which only fa...
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WO/1997/001882A1 |
An electric motor or generator (10) containing one or more stationary axial coils (12) for generating magnetic fields at the poles of one or more rotors (14) which interact with two or more field poles (20A-20D) and their associated magn...
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WO/1996/038903A1 |
A self-starting brushless electric motor having a first motor part (stator) (11) with poles arranged in a row, said poles constituting ferromagnetic poles (13S) or permament-magnet poles (14A), a second motor part (rotor) (12) with poles...
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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 ...
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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 ...
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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...
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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 ...
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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 ...
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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...
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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. ...
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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. ...
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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. ...
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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. ...
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