Stator, electrical rotating machine, stator winding method, and stator manufacturing method

A stator winding method of winding three-phase windings, with a conductor, around twelve magnetic pole teeth arranged at equal angular intervals on an inner peripheral portion of a stator core configured to constitute a three-phase, twelve-pole stator,

• wherein slots are formed between adjacent magnetic pole teeth,
• wherein the winding of each phase comprises a first portion and a second portion formed by separate conductors, respectively, and
• wherein when two axial end faces of the stator core are defined as a first end face and a second end face, respectively;
• and
• the twelve magnetic pole teeth are defined as, in order toward a first circumferential direction that is one of circumferential directions of the stator core, a first tooth through a twelfth tooth, respectively,
• the first portion of one of the three phases is formed by, through movement of at least one of:
• a first nozzle corresponding to the first portion;
• and the stator core, while feeding the conductor from the first nozzle:
• inserting the first nozzle into a first slot adjacent to the first tooth from the first end face side;
• then winding the conductor around the first tooth in a first direction;
• then drawing the first nozzle out from the first slot to the second end face side, and relatively rotating the first nozzle with respect to the stator core to a position of a second slot adjacent to the fourth tooth, thereby forming a linking portion on the second end face side;
• then inserting the first nozzle into the second slot from the second end face side, drawing the first nozzle out to the first end face side and pulling out the conductor by a predetermined length without passing through any step of winding the conductor around a magnetic pole tooth, and then re-inserting the first nozzle into the second slot from the first end face side, thereby forming a first lead-out portion of the conductor on the first end face side;
• then winding the conductor around the fourth tooth in a second direction opposite to the first direction;
• and
• then drawing the first nozzle out to the first end face side of a third slot, which is adjacent to the fourth tooth and located on a side opposite to the second slot with respect to the fourth tooth, and
• the second portion of said one of the three phases is formed by, through movement of at least one of:
• a second nozzle corresponding to the second portion;
• and the stator core, while feeding the conductor from the second nozzle:
• inserting the second nozzle into a fourth slot adjacent to the seventh tooth from the first end face side;
• then winding the conductor around the seventh tooth in the first direction;
• then drawing the second nozzle out to the first end face side from the fifth slot, which is adjacent to the seventh tooth and located on a side opposite to the fourth slot with respect to the seventh tooth, pulling out the conductor by a predetermined length, and then re-inserting the second nozzle into the fifth slot from the first end face side, thereby forming a second lead-out portion of the conductor on the first end face side;
• then drawing the second nozzle out from the fifth slot to the second end face side, and relatively rotating the second nozzle with respect to the stator core to a position of a sixth slot adjacent to the tenth tooth, thereby forming a linking portion on the second end face side;
• then inserting the second nozzle into the sixth slot from the second end face side
• then winding the conductor around the tenth tooth in the second direction;
• and
• then drawing the second nozzle out to the first end face side of the sixth slot.

A stator winding method of winding three-phase windings, with a conductor, around twelve magnetic pole teeth arranged at equal angular intervals on an inner peripheral portion of a stator core configured to constitute a three-phase, twelve-pole stator,

• wherein slots are formed between adjacent magnetic pole teeth, and
• wherein when two axial end faces of the stator core are defined as a first end face and a second end face, respectively;
• and
• the twelve magnetic pole teeth are defined as, in order toward a first circumferential direction that is one of circumferential directions of the stator core, a first tooth through a twelfth tooth, respectively,
• the winding of one of the three phases is formed by, through movement of at least one of:
• a first nozzle corresponding to the one phase;
• and the stator core, while feeding the conductor from the first nozzle:
• inserting the first nozzle into a first slot adjacent to the first tooth from the first end face side;
• then winding the conductor around the first tooth in a first direction;
• then drawing the first nozzle out from the first slot to the second end face side, and relatively rotating the first nozzle with respect to the stator core to a position of a second slot adjacent to the fourth tooth, thereby forming a linking portion on the second end face side;
• then inserting the first nozzle into the second slot from the second end face side;
• then winding the conductor around the fourth tooth in the first direction;
• then drawing the first nozzle out from the third slot, which is adjacent to the fourth tooth and located on a side opposite to the second slot with respect to the fourth tooth, to the second end face side, and relatively rotating the first nozzle with respect to the stator core to a position of a fourth slot adjacent to the seventh tooth, thereby forming a linking portion on the second end face side;
• then inserting the first nozzle into the fourth slot from the second end face side, drawing the first nozzle out to the first end face side and pulling out the conductor by a predetermined length without passing through any step of winding the conductor around a magnetic pole tooth, and then re-inserting the first nozzle into the fourth slot from the first end face side, thereby forming a lead-out portion of the conductor on the first end face side;
• then winding the conductor around the seventh tooth in a second direction opposite to the first direction;
• then drawing the first nozzle out from the fourth slot to the second end face side, and relatively rotating the first nozzle with respect to the stator core to a position of a fifth slot adjacent to the tenth tooth, thereby forming a linking portion on the second end face side;
• then inserting the first nozzle into the fifth slot from the second end face side;
• then winding the conductor around the tenth tooth in the second direction;
• and
• then drawing the first nozzle out to the first end face side of the fifth slot.

A stator winding method of winding three-phase windings, with a conductor, around twelve magnetic pole teeth arranged at equal angular intervals on an inner peripheral portion of a stator core configured to constitute a three-phase, twelve-pole stator,

• wherein slots are formed between adjacent magnetic pole teeth, and
• wherein when two axial end faces of the stator core are defined as a first end face and a second end face, respectively;
• and
• the twelve magnetic pole teeth are defined as, in order toward a first circumferential direction that is one of circumferential directions of the stator core, a first tooth through a twelfth tooth, respectively,
• the winding of one of the three phases is formed by, through movement of at least one of:
• a first nozzle corresponding to the one phase;
• and the stator core, while feeding the conductor from the first nozzle:
• inserting the first nozzle into a first slot adjacent to the first tooth from the first end face side;
• then winding the conductor around the first tooth in a first direction;
• directly thereafter, winding the conductor around the second tooth in a second direction opposite to the first direction;
• and
• then completing the winding around the second tooth at a second slot adjacent to the second tooth, drawing the first nozzle out from the second slot to the second end face side, and relatively rotating the first nozzle with respect to the stator core to a position of a third slot adjacent to the seventh tooth, thereby forming a linking portion on the second end face side;
• then inserting the first nozzle into the third slot from the second end face side, drawing the first nozzle out to the first end face side and pulling out the conductor by a predetermined length without passing through any step of winding the conductor around a magnetic pole tooth, and then re-inserting the first nozzle into the third slot from the first end face side, thereby forming a lead-out portion of the conductor on the first end face side;
• then winding the conductor around the seventh tooth in the first direction;
• directly thereafter, winding the conductor around the eighth tooth in the second direction;
• and
• then completing the winding around the eighth tooth at a fourth slot adjacent to the eighth slot, and drawing the first nozzle out to the first end face side of the fourth slot.