Abstract:
A method of manufacturing a laminated stator core includes: forming a band-shaped yoke core sub-piece having a shape that an outer half is developed in a straight line when a yoke portion of the laminated stator core is divided into two halves in the width direction by punching a metal plate; forming an outer laminated yoke body by winding and laminating the band-shaped yoke core sub-piece in a spiral shape and coupling it in a caulking manner; forming an inner yoke-attachment magnetic core sub-piece having an inner yoke sub-portion obtained by dividing the inner half in a unit of magnetic poles when the yoke portion of the laminated stator core is divided into two halves in the width direction, by punching a metal plate; forming an inner yoke-attachment laminated magnetic sub-body by laminating and coupling a predetermined number of the inner yoke-attachment magnetic core sub-pieces to each other in a caulking manner; forming an intermediate assembly in which the inner yoke sub-portions form a ring shape by winding a coil on the inner yoke-attachment laminated magnetic sub-body and connecting the ends of the inner yoke sub-portions in a predetermined number of the inner yoke-attachment laminated magnetic sub-bodies to each other; and coupling the inner yoke-attachment laminated magnetic sub-bodies to the outer laminated yoke body by shrink-fitting the outer laminated yoke body to the outer circumference of the intermediate assembly.
Abstract:
A stack of metallic laminations, a metallic lamination and a process for forming a lamination stack. The stack of laminations includes at least one locking lamination provided with at least two locking openings and at least one passage lamination comprising at least two passage openings, each locking lamination incorporating a tab that passes through a passage opening of a lamination seated against the locking lamination, said tab being bent so as to be contained in said passage opening and seated on an edge portion of the latter, deformed to the inside of the locking opening of the locking lamination, and at least one of the parts of locking lamination and passage lamination further comprising a lock means actuating in a lock receiving means provided in the other of said parts.
Abstract:
The laminated core structure of a motor includes a stator iron core formed by laminating a plurality of stator iron core thin sheets in which a plurality of magnetic poles are provided at fixed intervals along the circumferential direction on the inner peripheral side so as to project toward the center direction, and a rotor iron core arranged on the axis line of the stator iron core concentrically with the stator iron core and formed by laminating a plurality of disc-shaped rotor iron core thin sheets, the stator iron core and the rotor iron core each being fastened by caulking the plurality of thin sheets to each other. The core loss produced by caulking is decreased by particular placement of the center of a caulking uneven part of the stator iron core thin sheet and the center of a caulking uneven part of the rotor iron core thin sheet.
Abstract:
The laminated core structure of a motor includes a stator iron core formed by laminating a plurality of stator iron core thin sheets in which a plurality of magnetic poles are provided at fixed intervals along the circumferential direction on the inner peripheral side so as to project toward the center direction, and a rotor iron core arranged on the axis line of the stator iron core concentrically with the stator iron core and formed by laminating a plurality of disc-shaped rotor iron core thin sheets, the stator iron core and the rotor iron core each being fastened by caulking the plurality of thin sheets to each other. The core loss produced by caulking is decreased by particular placement of the center of a caulking uneven part of the stator iron core thin sheet and the center of a caulking uneven part of the rotor iron core thin sheet.
Abstract:
In a laminated iron core in which plural iron core pieces are laminated through caulking projections and caulking holes in which the caulking projections are fitted, and in the iron core pieces except a lowermost layer, the caulking projections and the caulking holes are formed at different positions of a same radius from a rotation center at skewing of the iron core pieces, and the caulking hole is longer in a circumferential direction than the caulking projection fitted in the caulking hole, and when the caulking projection of the iron core piece of an upper layer is fitted in the caulking hole of the iron core piece, a gap is formed in the circumferential direction of each of the caulking holes.
Abstract:
The invention provides a motor comprising a stator and a rotor. The stator core includes a laminated stator core made of laminated stator core plates in which straight cut surfaces are formed on a circular outer peripheral surface of the laminated stator core plates. The straight cut surfaces of the laminated stator core plates are circumferentially displaced every predetermined laminated stator core plates so that the straight cut surfaces are uniformly distributed in an axial and a circumferential direction of the laminated stator core. Therefore, a flow passage for lubricating oil is ensured, while local magnetic saturation of the stator core is dissolved and a cogging torque and an induced voltage waveform distortion rate are improved.
Abstract:
A concentrated winding type brushless DC motor has a stator formed by a slack of laminations of a ferro-magnetic material having an outer ring from which a plurality of spaced teeth extend inwardly and have slots between adjacent teeth. A drive coil is wound around each tooth in the presence of a spacer provided between an end surface of a stator tooth and the drive coil to reduce stress applied to a tooth by the coil as it is being wound. The final form of the motor has the spacer removed leaving a space between the coil and the tooth to form a magnetic pole of the stator.
Abstract:
A laminated plate assembly in which the laminations in a stack are secured together by means of one or more interlocks or tabs that project from the uppermost lamination in the assembly through holes or slots in all the other laminations in the assembly, or around the periphery of the other laminations in the assembly, with each tab being bent or pressed against the underside of the bottom lamination in the assembly. This secures all the laminations in the stack together, much like a staple secures papers in a stack together, allowing for additional handling and processing of the laminated plate assembly without concern that the laminated plates in the stack will become misaligned or even become removed from the stack.
Abstract:
A stator core for a concentrated winding type brushless DC motor that has a plurality of spaced teeth extending inwardly of the core outer diameter to a core inner diameter to define slots between two adjacent teeth for a winding. Each tooth has right and left distal ends projecting in opposite directions transverse to the tooth with the opposite distal ends of two adjacent teeth each being linear and defining an aperture into a slot between the two teeth. The distal end of each tooth also has an angled edge at the side facing the core outer diameter so that the distal end is wider at the aperture than at the point where the distal end extends from the tooth. Also, there is a distance T between a line connnecting the end points of the right and left distal ends of a tooth facing the core outer diameter at the aperture defined by each said distal end and a tangent line at an inner core diameter of the tooth and such that T≧0.
Abstract:
An ignition coil assembly having an inner core element formed from an interlocked stack of elongate laminae plates. Each of the laminae plates has a substantially common length and a substantially uniform width along the length thereof, with the length of each laminae plates being greater than a width thereof. A first one of the plurality of laminae plates being the widest laminae plate in the stack is located substantially in a center thereof with others of the laminae plates located above and below the first laminae plate and having progressively decreasing widths. Each of the laminae plates in the stack being interlocked to an adjacent laminae plate and the stack having substantially planar end surfaces that are provided with guide elements that are aligned substantially perpendicular to the widths of the plurality of laminae plates. The guide elements include notches and/or projections that can have various geometric shapes.