Patent application number | Description | Published |
20080224574 | STEPPING MOTOR AND STEEL PLATE FOR MANUFACTURING THE STEPPING MOTOR - A stepping motor comprising: | 09-18-2008 |
20080238237 | INDUCTION MACHINE - An induction machine has a stator and rotor. The stator comprises teeth and slots and stator winding disposed in the slots. The rotor comprises a rotor core having teeth and slots and a rotor-conductor disposed in the rotor slots. Both of the stator core and rotor core are made of laminated steel sheets, and the teeth and slots made of steel sheets are formed by etching. | 10-02-2008 |
20080238241 | COMMUTATOR MOTOR AND ELECTRIC VACUUM CLEANER USING THE SAME - An efficient and high-performance commutator motor in which both torque enhancement and iron loss reduction are achieved is provided by ensuring a sufficient area occupied by field windings wound on main poles and further suppressing the influence of armature counteractive magnetic flux and reducing pulsating torque. The commutator motor includes a stator and an armature. The stator includes a stator iron core having the main poles and slots and the field windings disposed in the slots. The armature includes an armature iron core having slots and teeth and armature windings wound in the slots. The stator and armature iron cores are formed of laminated steel sheets. The iron cores are formed by etching process. Multiple through holes are formed in the main poles opposed to the air gap positioned on the forward side in the direction of armature rotation by etching process. | 10-02-2008 |
20090230806 | ELECTRIC MOTOR - An electric motor comprising a rotor having plural magnetic poles in the circumferential direction; and a stator whose teeth are disposed opposite to the periphery of the rotor, with an air gap interposed between the rotor and the stator, wherein the coil conductors are wound on the stator so that two stator magnetic poles may be formed by two coil units of a phase wound around stator teeth within the range of 360 electrical degrees subtended by the magnetic poles of the rotor; each of the two coil units forming the stator magnetic poles spans an electrical angle less than 180 electrical degrees; the two coil turns forming the two stator magnetic poles are laid out so that they may not overlap each other; and the coil conductors are so wound that the adjacent stator magnetic poles exhibit opposite magnetic polarities. | 09-17-2009 |
20110018381 | ELECTRIC MOTOR - An electric motor comprising a rotor having plural magnetic poles in the circumferential direction; and a stator whose teeth are disposed opposite to the periphery of the rotor, with an air gap interposed between the rotor and the stator, wherein the coil conductors are wound on the stator so that two stator magnetic poles may be formed by two coil units of a phase wound around stator teeth within the range of 360 electrical degrees subtended by the magnetic poles of the rotor; each of the two coil units forming the stator magnetic poles spans an electrical angle less than 180 electrical degrees; the two coil turns forming the two stator magnetic poles are laid out so that they may not overlap each other; and the coil conductors are so wound that the adjacent stator magnetic poles exhibit opposite magnetic polarities. | 01-27-2011 |
20110062817 | STATOR CORE FOR DYNAMO-ELECTRIC MACHINE AND MANUFACTURING METHOD THEREFOR - A claw-pole type dynamo-electric machine, from which an improvement in productivity of stator winding can be expected, has such as a structure that the whole stator wiring is covered with a magnetic body, and thereby the inductance increases to pose the problem of decreasing a power factor. Disclosed is a stator core of a dynamo-electric machine in which a plurality of stator cores of respective phases are arranged independently in the direction of the rotating shaft of a rotor, the magnetic poles of the stator cores are arranged in the shape of a wave in the circumferential direction of the rotating shaft of a rotor, slots extending in the direction of the rotating shaft are formed between respective magnetic poles, and the stator winding can be arranged in a slot formed on the side of the inner end face of the magnetic pole arranged in the shape of a wave and in the axial direction of the rotating shaft. | 03-17-2011 |
20110148241 | Electric Motor - An alternator comprising a rotor having plural magnetic poles in the circumferential direction; and a stator whose teeth are disposed opposite to the periphery of the rotor, with an air gap interposed between the rotor and the stator, wherein the coil conductors are wound on the stator so that two stator magnetic poles may be formed by two coil units of a phase wound around stator teeth within the range of 360 electrical degrees subtended by the magnetic poles of the rotor; each of the two coil units forming the stator magnetic poles spans an electrical angle less than 180 electrical degrees; the two coil turns forming the two stator magnetic poles are laid out so that they may not overlap each other; and the coil conductors are so wound that the adjacent stator magnetic poles exhibit opposite magnetic polarities. | 06-23-2011 |
20120043847 | ELECTRIC MOTOR - An alternator comprising a rotor having plural magnetic poles in the circumferential direction; and a stator whose teeth are disposed opposite to the periphery of the rotor, with an air gap interposed between the rotor and the stator, wherein the coil conductors are wound on the stator so that two stator magnetic poles may be formed by two coil units of a phase wound around stator teeth within the range of 360 electrical degrees subtended by the magnetic poles of the rotor; each of the two coil units forming the stator magnetic poles spans an electrical angle less than 180 electrical degrees; the two coil turns forming the two stator magnetic poles are laid out so that they may not overlap each other; and the coil conductors are so wound that the adjacent stator magnetic poles exhibit opposite magnetic polarities. | 02-23-2012 |
20130069473 | Electric Rotating Machine - An alternator comprising a rotor having plural magnetic poles in the circumferential direction; and a stator whose teeth are disposed opposite to the periphery of the rotor, with an air gap interposed between the rotor and the stator, wherein the coil conductors are wound on the stator so that two stator magnetic poles may be formed by two coil units of a phase wound around stator teeth within the range of 360 electrical degrees subtended by the magnetic poles of the rotor; each of the two coil units forming the stator magnetic poles spans an electrical angle less than 180 electrical degrees; the two coil turns forming the two stator magnetic poles are laid out so that they may not overlap each other; and the coil conductors are so wound that the adjacent stator magnetic poles exhibit opposite magnetic polarities. | 03-21-2013 |
Patent application number | Description | Published |
20080315700 | Rotating Electrical Machine - Stator claw poles are disposed at a stator core at a position facing opposite a rotor so as to alternately range from the two sides along the axial direction. With a plurality of magnetic poles thus formed, the distance by which the gap between the front end portions of the stator claw poles and the stator outer circumference ranges is increased, which, in turn, reduces the reactance guided to a stator coil. It is ensured that the magnetic reluctance manifesting between the front end portions of the stator claw poles and an enclosing member that holds the stator core, facing opposite the centers of the claw poles along the circumferential direction, is greater than the magnetic reluctance manifesting between the front portions and the stator core enclosing member facing opposite the front end portions. | 12-25-2008 |
20080315702 | Alternator For Vehicle and Rotating Electrical Machine - An alternator for vehicle includes a stator that outputs an AC voltage and a rotor that includes a field coil and a rotor core. The stator includes a plurality of phase stators that are disposed side-by-side along the rotational axis and individually output AC voltages. The phase stators include an even number of stator tabs alternately extending from one outer side of a phase stator coil toward another outer side of the phase stator coil and extending from the other outer side toward the one outer side along the rotational axis. The rotor includes a field coil and a rotor core at which an even number of rotor tabs are formed along the circumferential direction so as to alternately extend from one outer side of the field coil toward another outer side of the field coil along the rotational axis and extend from the other outer side toward the one outer side along the rotational axis. A phase stator core at each phase stator is formed by laminating a plurality of magnetic sheets. | 12-25-2008 |
20090001843 | ROTATING ELECTRICAL MACHINE - A rotating electrical machine includes: a claw pole stator constituted with a stator core that includes a plurality of claw poles and a stator coil wound inside the stator core; and a rotor rotatably disposed at a position facing opposite the claw poles. The stator core is constituted of split blocks each corresponding to at least one of magnetic pole pairs each made up with two claw poles assuming different magnetic polarities when an electric current is supplied to the stator coil. | 01-01-2009 |
20090102314 | Rotating electrical machinery - A rotating electrical machine includes: a stator that includes two stator stages each constituted with a plurality of claw poles extending toward opposite sides along an axial direction at alternate positions and a ring-shaped core back that forms a magnetic path between the claw poles, the two stator stages being stacked over along the axial direction; a stator winding formed by winding a coil in a ring shape and disposed in a space enclosed by the claw poles and the core back at each of the stator stages; and a rotor rotatably disposed at a position facing the claw poles of the stator, and: stator windings corresponding to a plurality of phases are disposed together at least at one of the two stator stages. | 04-23-2009 |
20110025162 | Rotating Electrical Machine - A rotating electrical machine, includes; a rotor in which a plurality of magnetic poles are provided in circumferential direction, and a stator within the rotor is disposed with a gap against the rotor, wherein; two stator magnetic poles are formed by winding coils in phase and by the stator core within 360° of electrical angle defined by the magnetic poles of the rotor; the coil turns that form respective stator magnetic poles have angular widths in circumferential direction of less than 180° of electrical angle; the coil turns that form the respective two stator magnetic poles are provided so as not to mutually overlap and are wound so that adjacent ones of the stator magnetic poles have mutually opposite polarities, and; in the stator, each winding of each coil consists of an external bridge wire, a turn portion, an internal bridge wire, and a turn portion in that order. | 02-03-2011 |
20110025165 | ROTATING ELECTRICAL MACHINE - A rotating electrical machine including a rotor in which a plurality of magnetic poles are provided in circumferential direction, and a stator within the rotor is disposed with a gap against the rotor, wherein: coil groups are received in a slot between two teeth of the stator core; each of the teeth has a tooth main body and two tooth tip edge portions, and the tooth main body and the tooth tip edge portions are connected by connecting portions, with slits being formed in the coil sides of the connecting portions; and the slits extend from opening portions towards the centers of the tooth tip edge portions in circumferential direction, and are formed so that their tooth main body sides and their tip edge portion sides, that together define the opening portions of the slits, contact one another; with the gaps between adjacent ones of the tooth tip edge portions in circumferential direction being smaller than a width of the slot. | 02-03-2011 |
Patent application number | Description | Published |
20110172490 | INSERTION PORTION HOLDER, ENDOSCOPE APPARATUS, AND METHOD OF BUNDLING INSERTION PORTION - An insertion portion holder includes a plane portion formed in a flat shape with an elastic member, the plane portion including: a first through hole formed on the plane portion, for passing therethrough an insertion portion having flexibility extended from an endoscope operation portion; and a second through hole formed on the plane portion adjacently to the first through hole, for holding a distal end side part of the insertion portion. | 07-14-2011 |
20120209065 | ENDOSCOPE APPARATUS - An endoscope apparatus includes an insertion part which has an imaging mechanism at a distal end portion; a display part which displays an image acquired by an observation mechanism, a manipulating part which performs curving manipulation of the insertion part; and a housing which accommodates the display part and the manipulating part to a front face thereof, and which connects the insertion part with a back face opposite to the front face. The manipulating part has a swingable first joystick; and a curving mechanism having the first joystick and a manipulating member connected thereto. The swinging center of the first joystick is located inside a region specified by a portion where fingers are arranged in a side view of the housing when a user holds the housing, and by a distal end of the first joystick protruding toward the front face. | 08-16-2012 |
20120209066 | ENDOSCOPE APPARATUS - An endoscope apparatus includes an insertion part which has an imaging mechanism at a distal end portion and which is bendable and elongated; a display part which displays an image acquired by the imaging mechanism; a manipulating part which has a swinging body and which performs curving manipulation of the insertion part; and a housing which provides the display part and the manipulating part to a front face thereof, and which connects the insertion part with a back face opposite to the front face. | 08-16-2012 |
20120209067 | ENDOSCOPE APPARATUS - An endoscope apparatus includes an insertion part having an imaging mechanism at a distal end portion and which is bendable and elongated; a display part which displays an image acquired by an imaging mechanism; a manipulating part which performs curving manipulation of the insertion part; and a housing which the display part and the manipulating part are provided to a front face thereof, and which connects the insertion part with a back face opposite to the front face. The housing is capable of being self-supported in a state where the edge of the back face at the display part, and a connecting portion between the insertion part and the housing are brought into contact with the ground. | 08-16-2012 |
20120209068 | ENDOSCOPE APPARATUS - An endoscope apparatus includes a housing. The housing includes an upper portion provided with the display part, and a lower portion provided with the manipulating part and having the insertion part connected thereto, at least a portion of the back face of the lower portion is set so that the fundamental shape thereof is convex toward a proximal end portion of the insertion part, the convex portion is a grip face on which a user's fingers are arranged when the user holds the housing, and wherein the housing is held such that the thumb of one hand of a user is located at a distal end of a manipulating rod, the other fingers in the one hand of the user are located above and below the proximal end portion of the insertion part in the grip face, and the thumb and the other fingers face each other. | 08-16-2012 |