Abstract:
A brushless DC motor minimizes a chance of dislocation of or damage to an insulator used in the brushless DC motor. Slant portions are provided at end portions of the insulator; therefore, even if a nozzle of a machine for installing a winding should hit the insulator while moving between teeth, the insulator moves in a direction for coming in close contact with a slot aperture, i.e., in a direction substantially at right angles to a direction in which the nozzle moves. This arrangement prevents the insulator from moving by being pushed by the nozzle, making it possible to minimize a chance of occurrence of an insulation failure caused by a damaged or dislocated insulator.
Abstract:
A brushless DC motor minimizes a chance of dislocation of or damage to an insulator used in the brushless DC motor. Slant portions are provided at end portions of the insulator; therefore, even if a nozzle of a machine for installing a winding should hit the insulator while moving between teeth, the insulator moves in a direction for coming in close contact with a slot aperture, i.e., in a direction substantially at right angles to a direction in which the nozzle moves. This arrangement prevents the insulator from moving by being pushed by the nozzle, making it possible to minimize a chance of occurrence of an insulation failure caused by a damaged or dislocated insulator.
Abstract:
A method of producing iron cores by punching out rotor iron core pieces and stator iron core pieces from one and the same thin metal sheet and laminating them, wherein the pole teeth of roughly punched-out stator iron core pieces are subjected to stable drawing by pressing on side of voids left by punching out the rotor iron core pieces, securing a sufficient punching allowance for punching out the front ends of the pole teeth on the inner diameter side of the stator iron core pieces to ensure trouble-free punching even when the gap between the stator and rotor iron core pieces is small, the laminated iron cores having little sheet surface unevenness which is due to pressing and having superior characteristics causing no disturbance in the flow of flux. The method comprises the steps of punching out rotor iron core pieces from a thin metal sheet and laminating them, roughly punching out the pole teeth (7) of the stator iron core pieces from the thin metal sheet from which the rotor pieces have been punched out, thinning the pole teeth (7) by pressing it at a plurality of positions, drawing the material to the punched-out side of the rotor iron core piece so as to form thin regions (10, 11), punching out the front ends (8) of the pole teeth constituting the inner diameter side of the stator iron core pieces, and punching out the outer shape of the stator iron core pieces and laminating them.
Abstract:
In a rotating machine, a plurality of laminated electromagnetic steel sheets constitutes at least one of a stator and a rotor and a plurality of permanent joining portions to unit each of the laminated electromagnetic steel sheets to form a corresponding one of the stator and the rotor, the plurality of permanent joining portions being set to be located at positions at which an integration value of a magnetic flux density with respect to a plane enclosed with the permanent joining portions is always zeroed.
Abstract:
A brushless DC motor minimizes a chance of dislocation of or damage to an insulator used in the brushless DC motor. Slant portions are provided at end portions of the insulator; therefore, even if a nozzle of a machine for installing a winding should hit the insulator while moving between teeth, the insulator moves in a direction for coming in close contact with a slot aperture, i.e., in a direction substantially at right angles to a direction in which the nozzle moves. This arrangement prevents the insulator from moving by being pushed by the nozzle, making it possible to minimize a chance of occurrence of an insulation failure caused by a damaged or dislocated insulator.
Abstract:
A rotor core is formed from a stack of laminations. The core includes a plurality of generally circular laminations in a stacked formation one on top of each other. Each lamination defines an axis collinear with an axis of each other lamination in the stacked formation. The laminations each have first and second surfaces and the stack is configured to define at least one inner lamination having laminations adjacent to both its first and second sides and outer laminations having laminations adjacent to only one of its first and second sides. Each lamination has a predetermined number of circumferencially equally spaced slots that define conductor receiving regions. Each inner lamination includes at least one interlocking projection extending from one of the first and second surfaces thereof, at a predetermined radial distance from the lamination axis. Each lamination further defines at least one projection receiving region formed therein for receiving a projection from an adjacent lamination. When viewing the laminations stacks parallel to the axis, the projections are engaged in their respective projection receiving regions so as to define a staggered path of projection and receiving region engagements through the lamination stack. This staggered path configuration defines an elongated, tortuous path having a length greater than a height of the stack for eddy currents through the lamination stack, to increase impedance of an eddy current path therethrough.
Abstract:
Elektromotor, insbesondere zum Betrieb eines Lüfters oder einer Pumpe, mit einem Statorpaket, das von Wicklungen umwickelte Polschenkel aufweist, wobei die Polschenkel von einem Polring umgeben sind, an dem die Polschenkel lösbar befestigt sind, wobei die Polschenkel 3 jeweils über eine axial angeordnete Linearführung 5 insbesondere eine Schwalbenschwanzführung mit dem Polring 2 verbunden sind.
Abstract:
An iron core assembly is disclosed wherein the magnetic performance, rigidity and mechanical precision of the iron core assembly can be improved. A plurality of plate-shaped core segments (3) are disposed in succession to form a plurality of first and second core members (4, 5), respectively. Edge portions of adjacent core segments (3) of the first and second core members (4, 5) are coupled with each other. The first and second core members (4, 5) are alternately laminated one over another in such a manner that first inter-segment positions each defined between adjacent two first core segments (3) of the first core member (4) are offset from second inter-segment positions each defined between adjacent two second core segments (3) of the second core member (5) in a longitudinal direction of the first and second core members (4, 5), with those edge portions of the respective first and second core segments (3) which adjoin each other in a laminating direction in which the first and second core members (4, 5) are laminated being overlapping each other. The core segments (3) of the first and second core members (4, 5) are rotated relative to each other through the coupling means (3a, 3b) so as to form an enclosed or ring-like configuration (7).
Abstract:
A laminated article, in particular for electrical use, comprising a plurality of mutually superposed metal laminations (2) provided with a plurality of elements or clips (3) for connecting the article laminations (2) together, said clips (3) projecting from the surface of the laminations and being formed by deforming the laminations. The laminations comprise a plurality of cavities (6), each arranged to house a clip (3), said cavities (6) and clips (3) constituting coupling elements of male-female type.