A method of manufacturing a compressed coil and a system for holding a wire during the manufacture of a compressed coil are disclosed. The method includes providing a wire including a first lead section, a central section and a second lead section. The central section of the wire is wound around a bobbin to form a coil. A punch top is located over an end of the bobbin such that the end of the bobbin is located at least partially within a through-hole of the punch top. A second lead section of the wire is located within a groove in an outer surface of the punch top or bobbin and pressure is applied to the bobbin and/or punch top to compress the coil.

An insulation film peeling method which radiates laser light onto a front end portion of an insulation film-coated conducting wire including a conducting wire and an insulation film in a longitudinal direction, and which peels a part of the insulation film up to a peeling boundary of a predetermined regulated peeling length, includes performing a rectilinear scan of a first region, in which a radiation position of the laser light moves from one side toward the other side and then moves from the other side toward the one side upon reaching the other side, and performing a unidirectional scan of a second region, in which the radiation of the laser light is performed from one side toward the other side and then the radiation position returns to the one side in a state in which the radiation of the laser light stops upon reaching the other side.

A stator that includes an annular stator core having a plurality of slots and a plurality of coils attached to the stator core, the plurality of coils each including a main body that is inserted in the plurality of slots and includes two slot housed portions and coil end portions including oblique portions extending obliquely with respect to the axial direction, a radially first side end portion formed from one of the slot housed portions, and a radially second side end portion formed from the other one of the slot housed portions.

A rotating electric machine includes a pair of electric conductors for forming a coil and a weld. Each of the electric conductors has an end portion with an end surface. The weld is formed between the end portions of the electric conductors at the end surfaces of the end portions. Moreover, the end portions of the electric conductors are arranged so that parts of the end portions of the electric conductors adjoin each other. At least one of the end portions of the electric conductors has at least one slit formed therein to divide the end surface of the end portion into a plurality of sections. The weld is formed to cover, at least, the adjoining parts of the end portions of the electric conductors and the at least one slit.

The invention relates to a method (100) for electrically contact-connecting a winding (40) of an electrical machine (1) to a printed circuit board (92), wherein the electrical machine (1) has an armature (10) with a large number of teeth (20), wherein at least one winding (40), which is formed by an electrical conductor (42), is formed on one of the teeth (20). The method comprises the following steps: routing (110) the conductor ends (45) of the electrical conductor (42) out of the armature (10) in the axial direction of the electrical machine (1), shortening (115) the conductor ends (45) to the same length, routing (120) the conductor ends (45) through in each case one passage opening (67) in a centring element (66), wherein the centring element (66) has a centring means (69) which centres and orients in parallel the routed-through conductor ends (45), wherein the routed-through conductor ends (45) emerge from the centring element (66), routing (125) the conductor ends (45) through in each case one passage opening (73) in a sealing element (72), wherein the routed-through conductor ends (45) emerge from the sealing element (72), inserting (130) the centring means (69) into in each case one passage opening (73) in a sealing element (72), arranging (135) the sealing element (72) at least partially within a passage opening (6) in a housing element (5), and electrically contact-connecting (140) the conductor ends (45) to the printed circuit board (92).

An arm of a coil segment having an approximate U shape is placed in a slot of a stator core, and a portion protruding from the slot is bent in a circumferential direction. An arm is bent in a direction of an arrow A, and another arm positioned at an inner side in the radial direction in relation to this arm is bent in a direction of an arrow B. The arm positioned at the outer side has at least a part of a bending inner side surface of a bent portion hardened by pressurization.

A drive motor for a suction tool (400) or a machine tool in the form of a hand-held power tool (200, 300) or a semi-stationary machine tool. The drive motor (20, 120) has a stator (80) with an excitation coil assembly (86) and a rotor (40, 140) with a motor shaft (30, 130) which is rotatably mounted on the stator or relative to the stator (80) about a rotational axis (D) by means of a bearing assembly (24A), and the drive motor (20, 120) has a connection device (100) for electrically connecting the drive motor to an energizing device (206, 306) for energizing the excitation coil assembly (86). The connection device (100) has a main part (103) for securing to the stator (80) and a receiving arm (108) which protrudes from the main part (103), a conductor receiving area (107) being formed between the main part and the receiving arm for at least one electric coil conductor (88) of an excitation coil (87) of the excitation coil assembly (86). The connection device (100) has a connection contact region (101) for electrically connecting a connection line (15) for connecting to the energizing device (206, 306).

The invention relates to a rotor for an electric machine, comprising at least one first (22) and a second (32) conductor end and a contact element, which provides a connection between the at least two conductor ends (22, 32), and wherein the contact element can be positioned along a rotor axis (R) of the rotor in such a way that the connection can be established in an intermediate position, which is offset away from the rotor in relation to an end position of the contact element.

A method for producing an electric motor includes: connecting a first phase coil of three-phase coils to a positive side of a source of electrical power for magnetizing; passing an electric current through the three-phase coils in a state where a center of a magnetic pole of a rotor is rotated a first angle with respect to a center of a magnetic pole of the first phase coil; switching a connection with the positive side of the source of electrical power from the first phase coil to a second phase coil; and passing an electric current through the three-phase coils in a state where the center of the magnetic pole of the rotor is rotated a second angle with respect to a center of a magnetic pole of the second phase coil.

A fixture for holding a stator including a stator core having a plurality of stator windings during assembly. The fixture includes a first fixture portion including a base defining a first stator receiving portion that is receptive of a first end of the stator, a second fixture portion including second stator receiving portion that is receptive of a second end of the stator, and at least one alignment feature provided on one of the first fixture portion and the second fixture portion. The at least one alignment feature is configurated to establish a selected alignment between a terminal end of each of the plurality of stator windings and busbar.