The invention relates to a stator which may be used within an electric rotating machine and a method for manufacturing a stator. The stator (200) comprises a stator core (100) having a plurality of slots (101, 101a, 101b) arranged in circumferential direction (C) of the stator core (100), a plurality of conductors (102, 103) forming a stator winding, wherein at least a radially outer conductor (102) and a radially inner conductor (103) are arranged along a radial direction (R) of each slot (101). At least one pair of a radially outer conductor (102) of a first slot (101a) and a radially inner conductor (103) of a second slot (101b) circumferentially spaced from the first slot (101a) is electrically connected by a connection bridge (1). The connection bridge (1) comprises a first base element (2) and a second base element (3) connected to a respective conductor (102, 103) and a top element (4) being connected to the base elements (2, 3) and preferably arranged in a larger distance from the stator core (100) than the first base element (2) and second base element (3).

Connection device for a stator having a stator winding, including N phases, first and second connection units which each comprise N contact portions and a conductor arrangement. The contact portions of the first connection unit are each designed for electrically conductive contacting of one of N connection portions of the stator winding, and the conductor arrangement of the first connection unit electrically conductively connects the contact portions of the first connection unit. The contact portions of the second connection unit are each designed for electrically conductive contacting of one of N further connection portions of the stator winding and the conductor arrangement of the second connection unit comprises N conductor portions, which are electrically insulated from each other and are each electrically conductively connected to one of the N contact portions of the second connection unit. A fastening mechanism permits the connection units to be detached and fastened.

Connection device for a stator having a stator winding, including N phases, first and second connection units which each comprise N contact portions and a conductor arrangement. The contact portions of the first connection unit are each designed for electrically conductive contacting of one of N connection portions of the stator winding, and the conductor arrangement of the first connection unit electrically conductively connects the contact portions of the first connection unit. The contact portions of the second connection unit are each designed for electrically conductive contacting of one of N further connection portions of the stator winding and the conductor arrangement of the second connection unit comprises N conductor portions, which are electrically insulated from each other and are each electrically conductively connected to one of the N contact portions of the second connection unit. A fastening mechanism permits the connection units to be detached and fastened.

A brushless motor includes a motor body, a bracket, and a power supply structure for supplying power to the motor body through a through hole in the bracket. The motor body includes a stator having a core with teeth and a coil formed of a winding wound around the teeth. The power supply structure includes, for each phase, a winding pair including a first lead portion and a second lead portion of the winding, a guide part that guides the winding pair, and a connector part where the lead portions are electrically connected. The winding pair includes a first portion guided by the ide part and a second portion formed by bending the winding pair at an axially outer end of the first portion along a surface of the bracket. The first portion passes through the through hole in the axial direction. The second portion extends to the connector part.

A brushless motor includes a motor body, a bracket, and a power supply structure for supplying power to the motor body through a through hole in the bracket. The motor body includes a stator having a core with teeth and a coil formed of a winding wound around the teeth. The power supply structure includes, for each phase, a winding pair including a first lead portion and a second lead portion of the winding, a guide part that guides the winding pair, and a connector part where the lead portions are electrically connected. The winding pair includes a first portion guided by the ide part and a second portion formed by bending the winding pair at an axially outer end of the first portion along a surface of the bracket. The first portion passes through the through hole in the axial direction. The second portion extends to the connector part.

A stator for an electric actuator or motor, including: a solid body; a ferromagnetic core region between the layers of semiconductor material, electrically insulated from the layers of semiconductor material; a plurality of conductive through vias through the solid body; a first plurality of conductive strips, which extend parallel to one another above the core; and a second plurality of conductive strips, which extend parallel to one another above the core and opposite to the first plurality of conductive strips; wherein the first plurality of conductive strips, the plurality of conductive through vias, and the second plurality of conductive strips form a winding or coil of the stator.

A stator for an electric actuator or motor, including: a solid body; a ferromagnetic core region between the layers of semiconductor material, electrically insulated from the layers of semiconductor material; a plurality of conductive through vias through the solid body; a first plurality of conductive strips, which extend parallel to one another above the core; and a second plurality of conductive strips, which extend parallel to one another above the core and opposite to the first plurality of conductive strips; wherein the first plurality of conductive strips, the plurality of conductive through vias, and the second plurality of conductive strips form a winding or coil of the stator.

A conductor joining method includes: an initial-stage irradiation step in which an inner region of an end surface of each of first and second conductors is irradiated with laser light to form a pair of molten pools arranged side by side on the end surfaces of the first and second conductors in such a manner that an outer peripheral portion of each end surface forms a bank; a middle-stage irradiation step in which joint-side regions of the end surfaces of the first and second conductors which are close to each other are irradiated with laser light so that the molten pools are coupled to each other; and a late-stage irradiation step in which an entire end surface jointly configured by the end surfaces of the first and second conductors is irradiated with laser light in a substantially circular shape to form the molten pools into a hemispherical molten ball.

A conductor joining method includes: an initial-stage irradiation step in which an inner region of an end surface of each of first and second conductors is irradiated with laser light to form a pair of molten pools arranged side by side on the end surfaces of the first and second conductors in such a manner that an outer peripheral portion of each end surface forms a bank; a middle-stage irradiation step in which joint-side regions of the end surfaces of the first and second conductors which are close to each other are irradiated with laser light so that the molten pools are coupled to each other; and a late-stage irradiation step in which an entire end surface jointly configured by the end surfaces of the first and second conductors is irradiated with laser light in a substantially circular shape to form the molten pools into a hemispherical molten ball.

A coil conductor of each of a U-phase, a V-phase, and a W-phase is provided with a configuration in which a terminal wiring conductor, a first tooth conductor wound around a first tooth, a bridging line conductor, a second tooth conductor wound around a second tooth, and a neutral-point connection conductor are connected in this order. The terminal wiring conductor is connected to the first tooth conductor at an upper side of an insulator. The bridging line conductor is disposed on an upper side of the insulator disposed on a stator core and along an outer side portion of a tooth of another phase. The neutral-point connection conductor is connected to the second tooth conductor at a lower side of the insulator.