JPH1189194A - Stator structure for sr motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase utilization factors of slots and coils by connecting a plurality of dividers obtained by punching and laminating poles and strut bridging parts, and providing radially wound coils at cores of a stator at the dividers. SOLUTION: Dividers 10 are formed by a plurality of silicon steel sheets 11 each punched substantially in a T shape and laminating them. And, a recess 11D is formed between a pole 11B and a strut bridging part 11c, and a protrusion of a core 11A of the left adjacent divider 10 is engaged with or press-fitted in the recess 11D. Further, these eight dividers 10 associated in a tubular state are press-fitted in and inserted into a substantially ring-like reinforcing material 13, and an end 11E of the part 11c of each divider 10 is inscribed with the divider 10. For example, in the case of exciting poles A and E of the stator 1, two coils 12A, 12H provided at both the divider 10 for forming the pole A and left adjacent divider 10 is energized and excited, and hence utilization factors of the slots become substantially twice as large as prior art, and utilization factor of the coil can be enhanced to four times as large as prior art.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention has a large output,
Moreover, it has the feature of long durability time, such as electric vehicles,
The present invention relates to an SR motor (switched reluctance motor) suitable for application to an electric bicycle or a vacuum cleaner, and particularly to a stator structure of an SR motor.

[0002]

2. Description of the Related Art This type of SR motor has a structure in which, for example, a rotor having an outwardly projecting magnetic pole on the center side and a stator having an inwardly projecting magnetic pole outside the rotor are arranged. As shown in FIG. 5, a coil 101 formed by winding an appropriate winding is attached to each convex magnetic pole 100A on the stator 100 side.

[0003]

By the way, in such an SR motor stator, since the coil is disposed in the fan-shaped slot, the winding area of the coil is greatly restricted, and the number of turns is increased. And the utilization rate of the slots and coils is poor. In addition, such S
In the R motor, the magnetic poles (tays) of the stator are displaced by being pulled or displaced between the magnetic poles (taises) of the rotor and the magnetic poles (tays) of the rotor due to the action of the magnetic force during operation. It has occurred.

In view of the above circumstances, the present invention greatly increases the utilization rate of slots and coils, and can generate large electromagnetic energy with low power.
It is intended to provide an R motor.

[0005]

That is, according to the first aspect of the present invention, there is provided a rotor having an outwardly salient pole structure and a stator having an inwardly salient magnetic pole structure so as to surround the rotor from the outside. In the SR motor that rotates in a certain direction while detecting the rotor position, the stator has an arc-shaped tubular portion and a magnetic pole portion and a projecting portion that project inward and outward in the radial direction, and is stamped and laminated. A plurality of divided bodies separated for each magnetic pole are joined, and each of the divided bodies is provided with a coil wound radially around a core portion of a stator.

[0006]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic sectional view showing a main part of a stator 1 and a rotor 2 of an SR motor according to the present invention. This stator 1 is formed by joining a plurality of divided bodies 10 divided for each of magnetic poles A to H to each other. .
In this embodiment, the stator has eight poles (A to H) and the rotor 2 has six poles (I to N). However, the present invention is not particularly limited to this number. .

As shown in FIG. 2, each divided body 10 is formed by laminating a plurality of silicon steel sheets 11 punched in a substantially T-shape and stacking these punched silicon steel sheets 11. Appropriate portions (three end portions) are formed by half-blanking 10A as shown in FIGS.
As shown in FIG. 4, the punched silicon steel sheet 11 has an arc-shaped core portion (constituting a yoke portion) 11A, a magnetic pole portion 11B protruding inward in the radial direction, and a protrusion protruding outward in the radial direction. 11C. Moreover, in these divided bodies 10, a concave part 11D is formed between the magnetic pole part 11B and the protruding part 11C, and the convex part 11E of the core part 11A of the divided body 10 on the left is fitted into this concave part 11D. Or press fit. In addition, these tubularly mounted 8
Each of the divided bodies 10 is press-fitted and inserted into a substantially ring-shaped reinforcing body 13, and an end 11 </ b> E of a projecting portion 11 </ b> C of each divided body 10 is inscribed. In this embodiment, since the stator 1 has an eight-pole structure, the stator 1 is composed of eight divided bodies. However, if the stator 1 has an N-pole structure, the stator 1 is composed of the same number of N divided bodies.

As shown in FIG. 2, a coil (bobbin) 12 is inserted into these divided bodies 10 so as to pass through the core portion 11A. The coil 12 has a shape close to a fan shape. Is formed.

Therefore, according to this embodiment, during operation, for example, when the magnetic poles A and E of the stator 1 are excited to generate electromagnetic energy, the divided body 10 forming the magnetic pole A and Since the two coils (12A and 12H) provided in both of the adjacent divided bodies 10 are energized and excited, the slot utilization rate is substantially 2
2 times, coil utilization 4 times higher, high efficiency SR
A motor can be realized.

[0010]

As described above, according to the present invention, the stator includes the arc-shaped core portion, the magnetic pole portion and the projecting portion which project inward and outward in the radial direction while being separated for each magnetic pole. A plurality of punched and laminated divided bodies are joined, and each divided body is provided with a coil wound in a radial direction on a core portion of a stator, and each divided body is formed when joined. Since the coil is formed in a state where the slot portion is filled without gaps, the utilization rate of the slot is doubled as compared with the conventional case. In addition, when exciting the coil of each magnetic pole, the coil of the divided body on both sides adjacent to each other is energized, so the utilization rate of the coil is increased four times that of the conventional one, and the utilization rate of the slot and the coil is reduced. By adopting a configuration that greatly increases the power consumption, a large amount of electromagnetic energy can be generated with a small amount of power.
A motor can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a stator of an SR motor according to the present invention.

FIG. 2 is an exploded perspective view showing a divided body.

FIG. 3 is a cross-sectional view of a principal part showing a stacked state of silicon steel sheets constituting a divided body.

FIG. 4 is an explanatory view showing the shape of a silicon steel sheet.

FIG. 5 is an explanatory view showing a stator of a conventional SR motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator 10 Division body 11 Silicon steel plate 12 Coil 13 Reinforcement AH magnetic pole 2 rotor

Claims (1)

[Claims] An SR motor having a rotor having an outwardly salient pole structure and a stator having an inwardly projecting magnetic pole structure surrounding the rotor from outside, and rotating in a certain direction while detecting the rotor position. In, the stator has an arc-shaped tubular portion and a magnetic pole portion and a projecting portion projecting inward and outward in the radial direction, and is formed by joining a plurality of divided bodies that are punched and laminated and separated for each magnetic pole, A stator structure for an SR motor, wherein each divided body includes a coil wound radially around a core portion of the stator.