JPS63224638A - Stator for inner rotor type motor - Google Patents

Abstract

PURPOSE:To delete the number of assembling steps and to ensure the efficiency of a motor by laminating iron plates having a bridge and iron plates having no bridge to construct a toothed core, and integrally molding fixedly the core with an insulating material. CONSTITUTION:A toothed core 4 in which small number of core plates 2 having a bridge 1 and many core plates 3 having no bridge 1 are laminated fixedly is integrally molded fixedly at the inner peripheral edge, front and rear faces, and slot interiors with an insulating material 5. Then, winding conductors 6 responsive to the number of poles are wound in series from the outer periphery of the core 4, and engaged fixedly with the inner periphery of the core 7. Thus, the molding step of the material 5 is simplified, and it is not necessary to separately provide a slot insulating step.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a stator core of an internal rotor motor used for driving fans of home appliances, etc.

Conventional technology In general, the stator core of an internal rotor motor is separated into a yoke section and a tooth section, and windings must be directly wound around the tooth section core. Since it is necessary to ensure efficiency, the iron core is manufactured by separating adjacent teeth or poles, and the separated plurality of teeth are fixed with a non-magnetic material using appropriate means. After insulating the inside of the tooth slot in the process, the tooth core wrapped with the winding wire was fitted into the inner diameter of the yoke core. Therefore, after molding and fixing the separated teeth while holding them, it is necessary to insulate the inside of the tooth slot, which complicates the manufacturing process and requires a large number of man-hours. Therefore, there has been a need for a means to easily manufacture the toothed core and ensure the efficiency of the electric motor.

Conventionally, as shown in FIG. 5, the stator core of this type of internal rotation type electric motor is provided with a busy gap 101 at the inner peripheral edge, and adjacent teeth (
Pole) The non-magnetic material 10 is formed in a state where they are magnetically separated from each other.
The tooth core 103 fixed by 2 is covered with an appropriate insulating material 1.
04, a winding conductor 106 is wound thereon, and the tooth core 103 is fitted onto the inner diameter of the yoke core 106 (Japanese Patent Publication No. 36-23251).

In such a conventional configuration, as shown in FIG. 5, since adjacent teeth (poles) of the tooth core 103 are separated, The process of molding and fixing the non-magnetic material 102 required a large amount of man-hours. In addition, before winding the winding conductor 105 around the molded and fixed tooth core 103, the front and back surfaces of the core, the inside of the slot, etc. are coated with an insulating material 104.
There was a problem in that it needed to be imitated by

The present invention solves these problems, and aims to provide a stator core for an inner rotor type motor that can reduce the number of steps required to assemble the motor and ensure its efficiency.

Means for Solving the Problem In order to solve this problem, the present invention has teeth around which winding conductors are wound according to the number of poles of the motor, and a bridge is formed between the inner peripheral edges of the adjacent teeth. A toothed core is formed by arbitrarily laminating a core plate with a bridging portion and a core plate without a bridging portion, and a yoke core that is fitted to the outer periphery of the toothed core to form a magnetic path. is,
The front and back surfaces of the inner peripheral edge 2 of the toothed iron core and the inside of the slot are integrally molded and fixed with nine insulating materials.

Effect: With this configuration, the toothed core is held together by the core having a bridging portion, so the molding and fixing process using an insulating material can be simplified, and the toothed core has a small number of adjacent teeth. Mechanical strength and motor efficiency are ensured because the iron core plate with the two bridging parts and the insulating material are fixed together.
Furthermore, since the front and back surfaces of the inner peripheral edge part 1 of the toothed core and the inside of the slot are integrally molded with an insulating material, the insulation treatment process of the core is also greatly simplified.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4.

In the figure, the core plate 2 is made up of a small number of iron core plates 2 having a bridging part 1 and a large number of iron core plates 3 having no bridging part, and the toothed iron core 4 having a plurality of teeth is made of an insulating material 5 such as resin. It has a winding conductor 6 wound through it, and is fitted and fixed to the inner diameter part of the yoke part iron core 7. In the above configuration, a small number of iron core plates 2 having a bridging portion 1 and a large number of iron core plates 3 having no bridging portion
The toothed iron core 4 is formed by laminating and fixing the inner peripheral edge 1 on the front and back surfaces.

After the inside of the slot and the like are molded and fixed together with an insulating material 5, a winding conductor 6 corresponding to the number of poles is serially wound from the outer circumferential side of the toothed core 4, and then wound on the inner diameter side of the yoke core 7. It is inserted and fixed.

As described above, according to this embodiment, the tooth core 4 has a plurality of teeth connected and held together when the core plates are laminated, thereby simplifying the molding process for the insulating material 5. Since the front and back surfaces of the inner peripheral edge part 9 and the inside of the slot are insulated at the same time, there is no need to provide a separate insulation treatment process for the slot, which can greatly reduce the number of man-hours, and the iron core plate 2 has the bridge part 1.
Since only a small number of magnetic fluxes are required, there is little leakage of magnetic flux between adjacent teeth (poles) and the efficiency of the motor is ensured.

Effects of the Invention As is clear from the description of the embodiments above, according to the present invention, a core plate having a bridge portion and a core plate having no bridge portion are laminated to constitute a toothed core, and the toothed portion Since the iron core is integrally molded with an insulating material, the mechanical strength of the stator and the efficiency of the motor are ensured.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the main parts of a toothed core showing the structure of a stator of an internal rotor type electric motor according to an embodiment of the present invention, FIG. 2 is a top view showing a method of dividing the stator core, and FIG. FIG. 4 is a top view showing the structure of the stator, FIG. 4 is a side sectional view of the same, and FIG. 5 is a side sectional view showing the structure of the stator of a conventional internal rotor motor. 1...Bridging portion, 2... Core plate having bridging portion, 3... Core plate having no bridging portion, 4...
...Tooth core, 6...Insulating material, 6...
...Winding conductor, 7...Yoke part iron core.

Claims (1)

[Claims] It has teeth around which a winding conductor is wound according to the number of poles of the motor,
A toothed core is formed by arbitrarily laminating an iron core plate having a bridging portion on the inner periphery of adjacent teeth and an iron core plate without a bridging portion, and a magnetic path that is fitted to the outer periphery of this toothed iron core. A stator core for an internal rotor type electric motor, which is composed of a yoke core forming a yoke core, and the inner peripheral edge, front and back surfaces, and inside of the slot of the tooth core are integrally molded and fixed with an insulating material.