Compressor motor and compressor equipped with same
There is provided a compressor motor in which a teeth member and a yoke member are bonded while inhibiting deformation of bridge portions and which is capable of decreasing drop of torque due to a leakage magnetic flux. A stator is constituted of a teeth member 26 in which inner end portions of adjacent teeth 27 are continuous in a bridge portion and on which wires are wounded, and a yoke member 28 bonded to an outer side of the teeth member to form a magnetic path, the yoke member includes press-fitting concave regions 32 which are opened inwardly and into which outer end portions of the teeth are press-fitted, and inner side surfaces 32 A of the press-fitting concave regions which face each other possess projecting shapes, respectively, and both side surfaces 27 B of each of the outer end portions of the teeth are formed in a recessed shape which matches the shape of the inner side surfaces of the press-fitting concave regions.
1. A compressor motor which is stored m a container to drive a compression element, comprising:
a stator, and a rotor which is fixed to a rotary shaft to drive the compression element and which rotates on an inner side of the stator,
wherein the stator is constituted of:
a teeth member in which inner end portions of adjacent teeth are continuous in a bridge portion and on which wires are wounded, and
a yoke member bonded to an outer side of the teeth member to form a magnetic path,
wherein the yoke member comprises press-fitting concave regions which are opened inwardly and into which outer end portions of the teeth are press-fitted,
wherein projecting portions which have a wedge shape are formed in the inner side surfaces of the press-fitting concave regions which face each other, respectively,
wherein recessed portions which have a V-shape which matches the wedge shape of the projecting portions are formed at positions which match the respective projecting portions of the press-fitting concave regions, in both the side surfaces of each of the outer end portions of the teeth, respectively, and the projecting portions are press-fitted into the recessed portions, respectively,
wherein when a dimension from an outer end face of each of the teeth to an apex of the V-shape of the recessed portion in a direction parallel to a radial direction is defined as a, a dimension from a side surface of the teeth to the apex of the V-shape of the recessed portion in a width direction of the teeth is defined as b, a width dimension of the teeth is defined as B, a dimension from the outer end face of the teeth to a position of an opening of the press-fitting concave region in the direction parallel to the radial direction is defined as e, yield stress of the teeth member is defined as σy, and contact stress to be applied to the teeth when the outer end portion of the teeth is press-fitted into the press-fitting concave region is defined as σr, a value of the a is set to a range of σr·B/(σy−σr)≤a≤{(B−2b)/B} 2 ·e.
2. A compressor in which the motor according to claim 1 and the compression element are stored in the container.