JP2015033254A5 - Stator core assembly - Google Patents

Description

The present invention relates to a stator core assembly having a stator core for a rotating electrical machine.

Therefore, the inventors can increase the magnetic resistance in the short circuit direction and suppress the short circuit of the magnetic flux if the teeth are formed by laminating plate materials in the magnetic flux short circuit direction, that is, in the circumferential direction around the axis of the yoke. I thought that. This is realized by Patent Document 1.
However, in patent document 1, the yoke and teeth which comprise a stator core are separate bodies. For this reason, the magnetic circuit is divided at the connecting portion between the yoke and the tooth, and a minute air gap exists. The increase in magnetoresistance due to this division reduces the effective magnetic flux of the coil and causes the output of the rotating electrical machine to decrease.
The present invention has been made in view of the above points, and an object of the present invention is to provide a stator core assembly capable of suppressing a decrease in output of a rotating electrical machine.

A stator core assembly for a rotating electrical machine according to the present invention includes teeth, a yoke, and a mounting portion. The teeth are composed of a plurality of plate portions that are stacked in the circumferential direction around the axis of the yoke . The yoke connects a plate portion included in one of two teeth adjacent in the circumferential direction and a plate portion included in the other, and a connecting portion formed of the same member connecting the two teeth. Have. The mounting portion has a mounting hole through which a mounting bolt can be inserted, and is made of a member separate from the yoke and the teeth.

In the stator core assembly configured as described above, since the cores are laminated in the circumferential direction, the magnetic resistance when the magnetic flux flows in the circumferential direction of the teeth is smaller than the magnetic resistance when the magnetic flux flows in the radial direction of the teeth. Can be bigger. Therefore, the magnetic flux entering the teeth of the stator core from the first magnetic pole of the rotor is less likely to flow in the circumferential direction, and the degree of short-circuiting of the magnetic flux can be reduced. Therefore, the effective magnetic flux of a coil part can be increased and the fall of the output by a magnetic short circuit can be suppressed.

In the stator core assembly configured as described above, the magnetic flux that enters the plate portion of the teeth of the stator core from the first magnetic pole of the rotor enters the second magnetic pole of the rotor through the plate portion, the connecting portion, and the plate portion in order. The connection portion between the teeth and the yoke is integrally formed of the same member, so that there is no increase in magnetic resistance as in the conventional example, and a reduction in output of the rotating electrical machine can be suppressed.

First, the generator will be described with reference to FIGS. 1 and 2. As shown in FIGS. 1 and 2, the magnet generator 10 is an outer rotor type magnet AC generator, and includes a stator 11 as a stator, a rotor 15 as a rotor, and a crank position sensor 26. Yes. The stator 11 is attached to the engine cover 5 by mounting bolts 27 and includes a stator core Assy (assembly) 12, a bobbin 13, and a coil 14.

The stator core 40 is formed by arranging a plurality of core elements Assy (assemblies) 44 in the circumferential direction. In the present embodiment, twelve core elements Assy 44 are provided as many as the number of teeth 42. When the rotor has 12 magnetic poles, a single-phase generator can be used. As shown in FIG. 5, the core element Assy 44 is composed of a laminated body of U-shaped core elements 45 to 49.

Claims (9)

An annular yoke (41) , a plurality of teeth (42, 81) extending radially from the yoke, and a mounting portion (30) having a mounting hole (31) through which a mounting bolt can be inserted , A stator core assembly ( 12 ) for a rotating electrical machine (10) capable of winding a coil (14) around the teeth,
The teeth are a plurality of plates (51, 52, 53, 54, 55, 61, 62, 63, 64, 65, 82, 83) that are stacked in the circumferential direction around the axis (AX) of the yoke. Consisting of
The yoke connects the plate part included in one of the two teeth adjacent to each other in the circumferential direction and the plate part included in the other, and is formed of the same member as the two plate parts. the (71,72,73,74,75) possess,
The stator core assembly , wherein the attachment portion is formed of a member different from the yoke and the teeth . The connecting portion and the two plate portions connected to the connecting portion constitute a core element (45, 46, 47, 48, 49, 86) formed by bending a plate material. The stator core assembly of claim 1, wherein A plurality of the core elements are provided so as to be arranged in the circumferential direction,
Of the two plate portions of the core element, the one located in one of the circumferential directions is the first plate portion (51, 52, 53, 54, 55, 82), and the one located in the other circumferential direction Assuming that the second plate portion (61, 62, 63, 64, 65, 83) is used, the teeth are constituted by the second plate portion on one side in the circumferential direction and the first plate portion on the other side in the circumferential direction. The stator core assembly according to claim 2, wherein the stator core assembly is provided . A plurality of the core elements are provided such that a plurality of the connection portions are stacked in the radial direction,
The stator core assembly according to claim 3, wherein one side of the teeth in the circumferential direction includes a plurality of the second plate portions, and the other side in the circumferential direction includes the plurality of first plate portions. . The rotating electrical machine is an outer rotor type,
When a virtual straight line along the first plate portion of the core element is defined as a first virtual straight line (L1), and a virtual straight line along the second plate portion is defined as a second virtual straight line (L2), the first 5. The stator core assembly according to claim 3, wherein an intersection (P) between the virtual straight line and the second virtual straight line is located on the axial center side with respect to the connection portion. 6. The plate portion includes a winding portion (76) extending in the radial direction, and a first flange portion (77) protruding from the tip of the winding portion in the axial direction of the yoke,
The stator core assembly according to any one of claims 1 to 5, wherein an axial width (W1) of the winding portion is smaller than an axial width (W2) of the first flange portion. The stator core assembly according to any one of claims 1 to 6, wherein the tip end faces (78, 87) of the teeth have an arc shape when viewed from the axial direction. The stator core assembly according to claim 7, wherein the tip end surface has a shape along a virtual cylindrical surface (79) that is a virtual cylindrical surface concentric with the axis of the yoke. If the specific plate portion (82, 83) is the one located at the end in the circumferential direction among the plurality of plate portions constituting the tooth, the specific plate portion protrudes in the circumferential direction at the tip portion of the tooth. The stator core assembly according to any one of claims 1 to 8, further comprising a second flange (84, 85).