JP2000092760A - Split stator for motor-generator and manufacturer thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the performance of a motor and a generator by making a stator a cluster of section bars and applying a coil from an outside free space with the cluster developed into a belt-shape in a plane, thereby attaining the highly-dense coil in an application space and improving electromagnetic induction. SOLUTION: This stator 1, split at any part other than a groove 1a for disposing a coil 2, is constituted of a cluster of section bars 1b forming the split part and inserted into an outer tube 4 through an elastic ring 3. In application of coil, the section bars 1b forming respective split parts of the stator 1 are developed into a belt-shape in the horizontal direction, and inserted into the outer tube 4 through an elastic ring 3 with the coil 2 applied in this condition, thereby providing a coil product. It is thus possible to eliminate fine work requiring a high skill and attain cost reduction. It is also possible to improve the performance of a motor and a generator by applying a coil densely in a space for application and improving electromagnetic induction.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION

[0001]

[0001] The present invention relates to a motor and a generator.

[0002]

2. Description of the Related Art As a conventional example, there is a stator 1 shown in FIG. 5 ((a) is a cross-sectional view, and (b) is a partial cross-sectional view of (a)). A coil 2 is installed in the stator, and a coil protrusion preventing plate 3 is provided. FIGS. 6A and 6B are longitudinal sectional views of a stator and a coil, wherein FIG. 6A shows a stator using plastic, and FIG. 6D shows a stator using laminated silicon steel plates. FIG. 7 shows a longitudinal sectional view after the rotor 5 is mounted in the stator. A permanent magnet 6 is connected to the rotor surface. Actual motors and generators are provided with a yoke on the outer periphery of the stator for maintaining strength as a structure and for magnetic shielding, but are excluded from the scope of the present invention.

In the case of an electric motor, an externally controlled current is applied to a coil of the stator within the influence range of the magnetic field of the rotor to generate an electromagnetic force to rotate the rotor by the combination of the rotor and the stator. is there. In the case of a generator, the rotor is driven externally to generate an electromotive force in the coils of the stator by electromagnetic induction.

[Problems to be solved by the invention]

[0004] When the coil is applied to the stator, the coils are wound one by one in the groove of the stator from the inner peripheral side of the stator, which has many space restrictions.
Since there are 36 places, and the number of coil turns per groove reaches several tens, manual work requiring skill is required and the cost is high. In addition, the coil cannot be fully wound in the groove of the stator due to poor workability, and the stator is designed in consideration of the gap of 30 to 40% from the beginning. For this reason, the size of the stator has been increased, the energy conversion efficiency has been reduced due to electromagnetic induction, and the like. In addition, a metal stator has a high magnetic permeability, and an eddy current is generated in a metal material by an electromagnetic induction action, thereby causing a loss due to heat generation.

[0005] In order to overcome such cost and performance problems, the present invention provides a method for constructing a coil in a groove of a stator.
An object of the present invention is to provide a motor and a stator for a generator in which coils can be constructed at a high density so that they can be simplified under a condition where space constraints are extremely small.

Means for Solving the Problems [Solution 1]

In order to achieve the above object, the stator is divided circumferentially at a portion other than the groove in which the coil is provided, and can be mounted on the outer cylinder via an elastic ring. The section bar, which forms each divided part, is developed in a band shape in the horizontal direction. After the coil is installed in this state, it is inserted into the outer cylinder via an elastic ring to produce a product. [Solution 2] The claw for holding the coil formed on the inner periphery of the stator is abolished to facilitate the coil installation. After the stator is formed into a cylindrical shape, the inner cylinder is provided on the inner periphery. [Solution 3] When the stator material is a non-magnetic and non-conductive material such as plastic, there is no influence of magnetic flux.
In the case of metal, eddy currents are generated. Therefore, the inner and outer cylinders and the section bar are divided in the axial direction, and cutouts and through holes are provided on the inner and outer peripheral surfaces to reduce eddy currents.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1A is a cross-sectional view showing a configuration of the first embodiment. In the drawing, a stator 1 is circumferentially divided at a portion other than a groove 1a in which a coil 2 is provided, and is constituted by an aggregate of section bars 1b forming a divided portion. The stator 1 is inserted into an outer cylinder 4 via an elastic ring 3. ing. With these configurations and the rotor 5 coupled with the magnet 6, the electricity and the kinetic energy of the generator and the electric motor are converted. The material of the stator in this embodiment was plastic except for the coil which was a copper wire. Since plastic is a non-conductive material with low magnetic permeability, no eddy current is generated. Such a stator has the drawback that no magnetic path is formed in the stator material due to electromagnetic induction and magnetic energy cannot be used effectively. However, there is no attractive force due to the magnetism between the stator and the rotor, and reactance and heat generation do not occur. Has the advantage that it becomes insignificant.

FIG. 1B is a perspective view of one section bar. The section bar has a coil working groove 1a and a coil holding claw 1c. FIG. 2A shows a stator 1 which is an aggregate of section bars 1b on the outer cylinder 4 of FIG.
FIG. 4 is a partial longitudinal sectional view showing a construction state at a stage before insertion of a section bar, in which a section bar 1b is arranged in a plane on a construction jig 7; The coil is installed in this state, but the workability is good because the coil is installed from the outer peripheral side where there is no restriction on work. This also enables high-density construction of the coil. After the coil is installed, the assembly of section bars is wound into a cylindrical shape using an assembly jig or the like equal to the inner periphery of the stator, and fixed with an elastic ring.

FIG. 2B corresponds to claim 3.
Claw 1 for holding a coil at the inner peripheral end of section bar 1b
It is a longitudinal cross-sectional view of the part which separated c. In this state, the entrance is wide and the workability of the coil is improved. After coil construction, the stator is assembled on a cylinder. FIG. 3 shows a partial cross-sectional view after the thin inner cylinder 8 is inserted into the inner periphery of the stator. The wall thickness t is equivalent to the claw for holding the coil. The inner cylinder can prevent the coil from protruding, and can prevent invasion of foreign matter and the like.

In the above configuration, the stator material is made of plastic, but the present invention is also applicable when the material is made of metal. In this case, it is necessary to reduce the generation of eddy current. FIG. 4 shows a perspective view of a stator according to a fourth aspect. A circumferential notch M is provided on the outer periphery of the section bar of the stator, an axial notch N is provided on the inner cylinder,
Are provided, and the notch serves as an obstacle so that a magnetic path is not formed. Therefore, loss due to eddy current is eliminated.

【The invention's effect】

[0011] The stator is an aggregate of section bars,
Since the coil is constructed from the outside free space in a state where the assembly is spread in a band shape on a plane, it becomes an easy operation that can be performed by anyone from the delicate operation requiring skill in the past. This not only reduces costs, but also improves the electromagnetic induction and improves the performance of motors and generators by installing coils at high density in the installation space. Further, the size and weight can be reduced as compared with the conventional one, and the function is improved. Because the stator can be made in an environment in which the stator is shut off from the rotor side by the inner cylinder, the application range is widened without being affected by foreign matter or fluid. .

[Brief description of the drawings]

FIG. 1A is a cross-sectional view of a stator according to an embodiment,
(B) A perspective view of a section bar forming a stator according to a manufacturing method according to the embodiment,

FIG. 2A is a partial vertical cross-sectional view of a section bar after flat development according to a manufacturing method according to the embodiment, FIG. 2B is a partial vertical cross-sectional view of a section bar after flat development according to a manufacturing method according to the embodiment,

FIG. 3 is a partial cross-sectional view of a stator having an inner cylinder according to the embodiment;

FIG. 4 is a perspective view of a stator according to the embodiment,

FIG. 5 is a cross-sectional view of a conventional stator, (a) a cross-sectional view of a stator and a coil, (b) a partial cross-sectional view of a stator and a coil,

FIG. 6 is a longitudinal sectional view of a conventional stator and coil, (a).
Longitudinal section of plastic stator and coil, (b) longitudinal section of laminated silicon steel stator and coil,

FIG. 7 is a longitudinal sectional view of a conventional stator, coil and rotor.

[Explanation of symbols]

Reference Signs List 1 stator, 1a coil arrangement groove, 1b section bar, 1c coil holding claw, 2 coil, 3 elastic ring, 4 outer cylinder, 5 rotor, 6 magnet 7 construction jig, 8 inner cylinder, thickness of t inner cylinder, M Notch in circumferential direction, Notch in N-axis direction.

Claims (4)

[Claims] An energy conversion portion of a motor and a generator, comprising a stator having a built-in coil and a rotor on which a permanent magnet or an electromagnet is mounted, which is opposed to a stator inner peripheral surface via a gap. It is formed with a section bar that is divided in the circumferential direction at the part other than the groove,
A split stator for a motor and a generator, which is mounted on an outer cylinder via an elastic ring. 2. The method according to claim 1, wherein the split stator is developed in a band shape on a plane, and a coil is constructed in this state. Then, a stator, which is an aggregate of section bars, is inserted into the outer cylinder via an elastic ring to produce a product. Features stator. 3. The stator according to claim 1, wherein the coil holding claws formed on the inner periphery of the split stator are eliminated, and an inner cylinder is provided on the inner periphery of the stator. 4. The stator according to claim 1, wherein the inner and outer cylinders and the section bar are divided in the axial direction, and notches or through holes are provided in the inner and outer peripheral surfaces.