Rotating electric machine

A rotating electric machine, comprising a rotor which has a rotating shaft, a stator which is arranged at an outer periphery side of the rotor, and a case which contains the rotor and the stator,

• wherein the stator has a plurality of sub stator cores arranged in a circular ring, a yoke disposed in the outer periphery side of the plurality of sub stator cores arranged in a circular ring, and three bus rings attached to the plurality of sub stator cores arranged in a circular ring,
• each of the sub stator cores has a first insulated bobbin, a stator iron core, a second insulated bobbin, and a coil,
• the first insulated bobbin, the stator iron core and the second insulated bobbin are each composed of a teeth part and a core back part,
• the coil is disposed in teeth parts of the first insulated bobbin, the stator iron core, and the second insulated bobbin, all of which are stacked in layers,
• the first insulated bobbin has three ring holding parts which are formed in a core back part, extend in a circumferential direction, and are provided in a radial direction with respect to each other, and the bus rings are separately inserted into the ring holding parts formed in the first insulated bobbin,
• the first insulated bobbin, the stator iron core, and the second insulated bobbin each has a convex part formed at one side face of the core back part and a concave part formed at the other side face of the core back part,
• the yoke is inserted in the plurality of sub stator cores which are arranged in the circular ring,
• wherein a spatial distance is formed between each surface of the concave part and each surface of the convex part of the first insulated bobbin.