Armature and manufacturing method of armature

An armature comprising:

• an armature core provided with a plurality of slots extending in an axial direction;
• a plurality of first segment conductors disposed on one side of the armature core in the axial direction and including a first leg portion that extends to the other side of the armature core in the axial direction;
• a plurality of second segment conductors disposed on the other side of the armature core in the axial direction and including a second leg portion that extends to the one side of the armature core in the axial direction;
• and
• a coil portion including a joint portion in which at least a part of a first surface that is provided on a tip end portion side of each first leg portion of the plurality of first segment conductors and that is provided so as to extend along the axial direction, and at least a part of a second surface that is provided on a tip end portion side of each second leg portion of the plurality of second segment conductors and that is provided so as to extend along the axial direction are joined in one of the slots or on an outer side of one of the slots in the axial direction, wherein
• the first leg portion has a first leg portion body portion that has a thickness in a radial direction that is larger than a thickness in the radial direction of a first surface side part provided with the first surface,
• a minimum value of a dimensional variation range of a thickness of the first surface side part in the radial direction among the plurality of first segment conductors disposed in one of the slots is equal to or more than half of a maximum value of a dimensional variation range of a thickness of the first leg portion body portion among the plurality of first segment conductors disposed in one of the slots,
• the second leg portion has a second leg portion body portion that has a thickness in the radial direction that is larger than a thickness in the radial direction of a second surface side part provided with the second surface, and
• a minimum value of a dimensional variation range of a thickness of the second surface side part in the radial direction among the plurality of second segment conductors disposed in one of the slots is equal to or more than half of a maximum value of a dimensional variation range of a thickness of the second leg portion body portion among the plurality of second segment conductors disposed in one of the slots.

A manufacturing method of an armature that is a manufacturing method of an armature core provided with a plurality of slots extending in an axial direction, the manufacturing method comprising:

• a step of preparing a plurality of first segment conductors disposed on one side of the armature core in the axial direction and including a first leg portion that extends to the other side of the armature core in the axial direction;
• a step of preparing a plurality of second segment conductors disposed on the other side of the armature core in the axial direction and including a second leg portion that extends to the one side of the armature core in the axial direction;
• a step of moving the plurality of first segment conductors from one side of the armature core to a side of the slot;
• a step of moving the plurality of second segment conductors from the other side of the armature core in the axial direction to the side of the slot;
• and
• a step of forming a joint portion by joining at least a part of a first surface that is provided on a tip end portion side of each first leg portion of the plurality of first segment conductors and that is provided so as to extend along the axial direction, and at least a part of a second surface that is provided on a tip end portion side of each second leg portion of the plurality of second segment conductors and that is provided so as to extend along the axial direction, in one of the slots or on an outer side of one of the slots in the axial direction, wherein
• the step of preparing the first segment conductor is a step of preparing the first segment conductor in which the first leg portion has a first leg portion body portion and a first surface side part provided with the first surface and having a thickness in a radial direction smaller than a thickness in the radial direction of the first leg portion body portion,
• the step of preparing the second segment conductor is a step of preparing the second segment conductor in which the second leg portion has a second leg portion body portion and a second surface side part provided with the second surface and having a thickness in the radial direction smaller than a thickness in the radial direction of the second leg portion body portion, and
• in the step of preparing the first segment conductor and the step of preparing the second segment conductor, the first segment conductor and the second segment conductor are prepared so that a thickness of the joint portion is equal to or larger than a thickness of a part other than the joint portion, in the radial direction.