The disclosure provides a combined motor stator which is configured to be cooperated with a rotor. The combined motor stator includes a stator yoke and a plurality of stator teeth. The stator yoke has a plurality of first mount structures. Each of the plurality of stator teeth has a second mount structure. The second mount structures of the stator teeth are respectively and removably mounted on the first mount structures of the stator yoke. Each of the second mount structures is in a dovetail shape.

An electric machine comprises a yoke supporting N toroidal coils and a central rotor comprising a permanent magnet. The yoke has a plurality of stator modules comprising at least one stator core made from a soft ferromagnetic material supporting at least one coil. The stator cores have, at their front ends, complementary coupling surfaces providing magnetic and mechanical continuity. The machine further comprises—a cylindrical outer casing made from a thermally conductive material, —a plurality of continuous and solid longitudinal ribs extending radially and positioned between the cylindrical outer casing and the stator modules, in order to ensure the mechanical positioning of the yoke relative to the outer casing and promote the thermal conduction of heat from the yoke toward the outer casing.

A sheet-metal part or sintered part (10) for a stator or a rotor has a connection part (11) from which teeth (12) disposed at regular intervals project away. Each tooth has at least one first tooth segment (22) as well as at least one second tooth segment (23) produced from different magnetizable materials (M1, M2). In this way, the materials (M1, M2) can be used in targeted manner with regard to their magnetic and/or mechanical properties, in the region of the tooth (12), to optimize the magnetic and/or mechanical behavior of the tooth (12) and consequently of the sheet-metal part or sintered part (10). In particular, at least one first tooth segment (22) has a saturation magnetization BS1 greater than that of the remainder of the sheet-metal part or sintered part (10).

The invention relates to a stator (8) for an electromagnetic motor or generator comprising windings (4) and a magnetic circuit, the stator (8) comprising a yoke with a circular or polygonal shape and winding support teeth (3). Each winding (4) rests on a tooth (3) while at least partly surrounding a winding support (13, 14), each winding support (13, 14) comprising or being associated with snap snap-fitting means (15′) that cooperate with complementary snap-fitting means (3′) supported by a tooth (3) associated with the winding support (13, 14) so that the winding support (13, 14) is fastened to the associated tooth (3).

A lamination for use in an electric machine stator includes a body having a generally circular outer periphery and a generally circular inner periphery, spaced from the outer periphery and a plurality of spaced apart teeth extending inwardly from the circular inner periphery. Each of said teeth define opposed inner edges thereof. The lamination includes a first pair of tips extending tangentially in opposed directions from the inner edge of one of said teeth and a second pair of tips extending tangentially in opposed directions from the inner edges of another one of said teeth. A tip of the first pair of tips and a tip of the second pair of tips define a first configuration having a first gap therebetween and defining a second configuration having a second gap therebetween. The first gap being substantially less than the second gap.

A straight line lamination for an electric motor has alternating finger segments and hinge segments to be rollable after windings are installed to form a circular motor stator. The lamination is configured such that inner edges of a back iron region are non-arcuate in shape to provide extra back iron material near the hinge segments for mitigating torque constant roll off.

A stator tooth includes an arc-shaped stator yoke portion and a stator tooth portion. The arc-shaped stator yoke portion extends along an arc having an axis as a center. The stator tooth portion includes a tooth body segment and two shoe-shaped structures. The tooth body segment, protruding along a centripetal axis from the arc-shaped stator yoke portion, has a first inner arc-shaped edge defined with a first center and a first radius. The centripetal axis passes through a center point of first inner arc-shaped edge, the first center and the axis. The two shoe-shaped structures extend oppositely, but symmetrically, from the tooth body segment, and each the shoe-shaped structure has a second inner arc-shaped edge and an inner-edge end point. The second inner arc-shaped edge, extending from the first inner arc-shaped edge to the inner-edge end point, has a second radius larger than the first radius.

A stator assembly includes a stator core. The stator core includes a yoke and teeth. Each of the teeth includes a neck and a tip. The neck includes a first stacking portion, a second stacking portion, a first plane and a second plane. The first stacking portion and the second stacking portion are arranged opposite to each other, and the first plane and the second plane are arranged opposite to each other. The first stacking portion and the second stacking portion are formed by stacking silicone steel sheets of the neck, and the first plane and the second plane are outer surfaces of silicone steel sheets at two terminal ends of the neck in a stacking direction.

A stator including a stator core formed in a ring shape is manufactured as follows; previously preparing an original core body provided with a belt-shaped part in a straight line shape structured of multiple outer peripheral parts and multiple salient pole parts, forming a recessed part on each of outer side faces of first outer peripheral parts disposed on both end sides of the belt-shaped part at a position between the salient pole part connected with the first outer peripheral part and an end part in the longitudinal direction of the belt-shaped part; and a bending step in which the original core body is successively pressed and bent from a center of the belt-shaped part toward both end sides.

A blower includes a housing, and an impeller and a motor received in the housing. The motor drives the impeller to rotate. The motor includes a stator and a rotor. The stator includes a stator core and windings wound around the stator core. The stator core includes a yoke and teeth extending from the yoke. A distal end of each of the teeth forms a tooth tip, with a slot opening formed between each two adjacent tooth tips. The rotor includes a permanent magnet forming a plurality of magnetic poles. The stator and the rotor define an air gap therebetween. A circumferential width of the slot opening is equal to or less than two times of a radial width of the air gap.