The invention relates to a coil former (1) for winding conductor wire (100) into coil windings (101), in particular for subsequent insertion in a stator carrier, said coil former having a coil former front (2) and a coil former rear (3), wherein the coil former front (2) and the coil former rear (3) span, by means of a peripheral surface (4), a spiral winding path (P) around a spiral axis (W) for the conductor wire (100), and wherein support elements (10, 11) are arranged along the winding path (P) and protrude beyond the peripheral surface (4) and laterally delimit the spiral winding path (P). The invention also relates to a winding device (50) having a coil former (1) of this kind and to a method for operating the winding device (50).

A manufacturing method for a stator winding coil includes: a bulging portion forming step that forms a bulging portion on a conductor wire; a crank portion forming step that forms a crank portion on the central portion of the bulging portion; an oblique portion forming step that forms oblique portions on the conductor wire at two ends of the bulging portion; a rectilinear portion forming step that forms rectilinear portions on the conductor wire at opposite ends of the oblique portions from the bulging portion; and a circular arc forming step that forms the oblique portions into a circular arc shape after forming the rectilinear portions.

A stator manufacturing method that includes a lead wire bending process of inserting a plurality of concentrically wound coils into slots, each of the concentrically wound coils being formed by winding a flat conductive wire for a plurality of turns, each of the slots being formed between every two adjacent teeth extending radially inward from an annular back yoke of a stator core, and bending lead wire portions of the inserted concentrically wound coils projecting in an axial direction from an end surface of the stator core, and a second bending process of bending the lead wire portions using the connection parts as fulcrums so that the lead wire portions approach the end surface of the stator core along the circumferential direction of the stator core after the first bending process.

A coil includes a series of turns constituted by a first turn to an n-th turn of a conductive wire having a quadrangular cross-section, where the conductive wire is wound in a spiral shape and is stacked in a vertical direction, and n is an integer equal to or greater than 3. In addition, at least a part of the conductive wire of the first turn to the n-th turn is provided with a deformed part whose shape is different from shapes of the other parts. Further, the first turn and the n-th turn are on the both end parts of the series of turns. In addition, at each of the first turn and the n-th turn, the deformed part makes an outer surface positioned on an opposite side with respect to a center of the series of turns extend in a flush manner along a plane intersecting the series of turns.

A strip of laminating steel for electric motors or generators is rolled over a mandrel in order to create an electric motor rotor or stator. The outside diameter of the mandrel determines the inside diameter of the roll, while the length of the strip determines the outside diameter of the roll. Slots for the insertion of magnet wire are either precut into the sides of the strip, or cut into the sides of the roll with metal working machinery after the roll has been wound. The slots can be created on one or both sides of the roll. Inserting magnet wire coils in these slots creates a rotor or a stator for an electric machine. A rotor surrounded by two identical stators with their stator windings facing the two rotor sides, or a stator containing slots on both sides which share one winding in its stator slots surrounded by two identical rotors comprise the main components.

A stator coil that is wound by concentrated winding and installed in a slot of a stator includes a winding part in which a conductor is wound pitch by pitch around a tooth of the stator and connection terminals which extend from both ends of the winding part. The winding part includes a plurality of unit winding subparts of a rectangular annular shape, a unit winding subpart including a pair of first straight-line segments, a pair of second straight-line segments, and curved corner segments which join the first straight-line segments and the second straight-line segments. In one of the pair of first straight-line segments, incline segments where the conductor is shifted by one pitch toward a winding axis direction are formed. In at least one of the unit winding subparts, a part of an incline segment is made by a part of each of the curved corner segments.

This disclosure discloses a rotating electric machine including a rotor and a stator. The rotating electric machine includes a stator core including a teeth part, and an air core coil. The air core coil is fitted to the teeth part. The air core coil includes curved end surfaces configured to approximately define a part of cylindrical shape at inner radial side and outer radial side. The air core coil includes approximately flat end surfaces at both circumferential sides and both axial sides.

The invention relates to an electrotechnical coil, to a method for producing same, and to an electromagnet or an electric machine comprising at least one such coil. The aim of the invention is to produce and use an electrotechnical coil for achieving an increased slot fill factor reliably and easily in a reproducible and economical manner. This is achieved in that the method according to the invention has the steps: step A: casting an electrotechnical coil with at least one winding which runs about a coil axis; and step B: shaping the coil, thereby changing the cross-section Q, Q of the at least one winding, such that the centroid FS, FS of the cross-section Q, Q of the at least one winding is displaced at least partly in the radial direction R relative to the coil axis A.

An apparatus for manipulating a material is provided. The apparatus may comprise one or more stator coils arranged in a three-dimensional configuration, and a surface on which at least one carrier is configured to move. The stator coils of the apparatus may be configured to generate an electromagnetic field for driving the carrier on the surface to manipulate a material.

Provided are an axial gap motor and a method for manufacturing a winding therefore capable of realizing low cost and high output without causing a jumper wire of a continuously wound coil obtained by winding an insulated conductor wire to protrude from the coil. The axial gap motor comprises a stator which is obtained by disposing a plurality of coils in a ring shape, and a rotor which is rotatably attached so as to face one or both principal surfaces of the stator and includes a plurality of permanent magnets corresponding to the plurality of coils of the stator. Each of the plurality of coils constituting the stator is formed by continuously winding one or more insulated conductor wires as coil wires around two or more separation cores. A core lamination thickness is indicated by L1 and a radial length of each coil is indicated by L2, a relation of L2<L1 is satisfied. In each coil, a length of a jumper wire of the insulated conductor wire continuously wound on the two or more separation cores is equal to the radial length L2 of the coil.