JPH11234983A - Single-phase AC motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain aligned coil winding for size reduction and higher output characteristics in a motor by forming outer core slots and inner core slots, in which previously wound coils are inserted, at a plurality of positions along the peripheral direction on the inner periphery side of the outer core and the outer periphery side of the inner core. SOLUTION: The core 4a of a stator is divided into an outer core 9 and inner core 10 along the radial direction. An outer core slot 13 for inserting a coil 12 previously aligning-wound around a bobbin 11 is formed in the outer core 9 along the circumferential direction respectively at a plurality of positions. An inner core slot 16 for inserting a coil 15 previously aligning-wound around a bobbin 14 is formed in the inner core 10 along the circumferential direction respectively at a plurality of positions. The coils 12 and 15 previously wound around the bobbin 11 and 14 are inserted into the slot 13 and 16 respectively. Hence, the coil can be aligning-wound, the coil ends can be prevented from being overlapped so as to be shorter. It is thus possible to attain size reduction and higher output characteristics in the motor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-phase AC motor.

[0002]

2. Description of the Related Art Conventionally, efforts have been made to improve the output characteristics of a single-phase AC motor (hereinafter referred to as a motor) or to reduce the size of the structure without at least reducing the output characteristics. As one of the means for improving the output characteristics, various methods have been devised for winding the coil provided on the stator of the motor in order to shorten the length of the coil end. In the case of core winding, there is a problem that the coil end length is increased, the output characteristics of the motor are reduced, and it is not possible to contribute to downsizing.

As another means for improving the output characteristics, there is a point that a coil and an iron core are effectively used magnetically. In a toroidal winding, a radially outer winding portion with respect to the iron core is magnetically used. There is a problem that it does not work effectively. Furthermore, in the ramen core as a configuration of the iron core,
Since the number of slots for winding the coil is relatively large and the iron core is easily magnetically saturated, it is necessary to increase the size of the iron core in order to prevent this, and it is difficult to reduce the size of the motor. is there.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a single-phase AC motor capable of improving output characteristics and miniaturizing the structure. It is to provide.

[0005]

According to a first aspect of the present invention, a substantially ring-shaped core comprises a substantially ring-shaped outer core and a substantially ring-shaped inner core fitted to an inner peripheral portion of the outer core. An outer core slot into which a pre-wound coil is inserted is formed at a plurality of locations along the circumferential direction on the inner peripheral side of the outer core, and is wound on the outer peripheral side of the inner core in advance. A single-phase AC motor characterized in that inner core slots into which coils are inserted are formed at a plurality of locations along a circumferential direction.

According to the first aspect of the present invention, the core of the stator is radially divided into an outer core and an inner core, and a coil wound on a bobbin is inserted into each slot of each core. I do.

According to a second aspect of the present invention, there is provided the single-phase AC motor according to the first aspect, wherein a cutout is provided in the inner core at a position corresponding to the outer core slot of the outer core.

According to the second aspect of the present invention, since the notch is formed in the inner core, the magnetic resistance can be increased with respect to the outer core slot formed in the outer core.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 to FIG. 10 show an embodiment of the present invention.

FIG. 1 is a sectional view of a part of a stator of a motor 1 according to the present embodiment, FIG. 2 is a plan view of a coil end portion of the stator, and FIG. , FIG.
5 is a longitudinal sectional view of the motor 1, FIG. 5 is a sectional view of an outer core constituting a stator, FIG. 6 is a sectional view of a state where a coil is mounted on the outer core, and FIG. FIG. 8 is a plan view of the vicinity of the coil end in a state where
10 is a cross-sectional view of the inner core constituting the stator, FIG. 9 is a cross-sectional view showing a state where the coil is mounted on the inner core, and FIG.
FIG. 4 is a plan view of a coil end portion in a state where a coil is mounted on an inner core.

Referring to FIGS. 3 and 4, the motor 1
Will be described.

In the following embodiment, a single-phase 4
A pole AC motor will be described as an example, and each figure shows a quarter portion along the circumferential direction, but a similar configuration is used for the other remaining portions, and a configuration having six poles or more. It is obvious that the present invention is also carried out for the above motor. A stator 4 having a plurality of coils 3 mounted thereon and a rotor 5 are arranged in a casing 2 of the motor 1, and a wiring board 6 is arranged below the stator 4 in FIG. 4. The wiring board 6 is a connector 7
Is connected to an external control device. The casing 2 is a lid plate 8
Covered by.

Hereinafter, FIG. 1 and FIG. 2 will be referred to together.

In this embodiment, the core 4a of the stator 4 is divided into an outer core 9 and an inner core 10 in the radial direction.

An outer core slot 13 is formed in the outer core 9 at a plurality of positions along a circumferential direction for inserting a coil 12 wound in a line on a bobbin 11 made of an electrically insulating material.

The inner core 10 is provided with a plurality of inner core slots 16 along the circumferential direction for inserting a coil 15 which has been wound in a line on a bobbin 14 also made of an electrically insulating material. Inner core slot 16
Notches 18 are respectively formed at positions corresponding to the outer core slots 13 of the outer core 9. FIG.
And as shown in FIG. 2, each outer core slot 13,
Reference numerals 16 are arranged so as to be shifted from each other by 45 degrees in the circumferential direction.

Hereinafter, FIG. 5 to FIG. 10 will be referred to together.

The inner peripheral surface 19 of the outer core slot 13 of the outer core 9 is formed parallel to the insertion direction of the coil 12 indicated by the arrow A1.

The inner peripheral surface 20 of the inner core slot 16 of the inner core 10 has a coil 15 indicated by an arrow A2.
Are formed along the insertion direction.

Such outer core 9 and inner core 10
After the coils 12, 15 are respectively inserted, they are fitted to each other to form the core 4a of the stator 4.

As described above, in the motor 1 of the present embodiment, the core 4a of the stator 4 is
Are divided along the radial direction, and the bobbins 11,
The coils 12 and 15 wound around the cores 9 and 10
In each of the slots 13 and 16.

As a result, the coils 12 and 15 can be aligned and wound, the coil ends do not overlap, and the coil ends can be shortened as a whole. Therefore, the motor 1
Can be reduced in size and the output characteristics can be improved.

In this embodiment, since the notch 18 is formed in the inner core 10, the magnetic resistance can be increased with respect to the outer core slot 13 formed in the outer core 9.

Resources can be saved with respect to material removal from the material when manufacturing the core 4a of the stator 4.

Further, in the present embodiment, the stator 4 can be downsized without wasting the magnetic path portion of the core 4a as compared with a conventional technology such as a ramen core as an example. That is, the size of the motor 1 can be reduced as a whole,
As a result, costs can be reduced.

[0027]

As described above, in the single-phase AC motor according to the first aspect, the coils can be aligned and wound, the coil ends do not overlap, and the coil ends can be shortened as a whole. Therefore, the size of the motor can be reduced and the output characteristics can be improved.

In the single-phase AC motor according to the second aspect, since the notch is formed in the inner core, a large magnetic resistance can be formed with respect to the outer core slot formed in the outer core.

[Brief description of the drawings]

FIG. 1 is a sectional view of a part of a stator 4 of a motor 1 according to one embodiment of the present invention.

FIG. 2 is a plan view of a coil end portion of a stator 4.

FIG. 3 is a front view of the motor 1. FIG.

FIG. 4 is a longitudinal sectional view of the motor 1.

FIG. 5 is a sectional view of an outer core 9 constituting the stator 4.

FIG. 6 is a cross-sectional view showing a state where the coil 12 is mounted on the outer core 9;

7 is a plan view of the vicinity of a coil end where a coil 12 is mounted on an outer core 9. FIG.

FIG. 8 is a sectional view of an inner core 10 constituting the stator 4.

FIG. 9 is a cross-sectional view showing a state where the coil 15 is mounted on the inner core 10.

FIG. 10 is a plan view of a coil end portion in a state where the coil 15 is mounted on the inner core 10.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor 3, 12, 15 Coil 4 Stator 4a Core 5 Rotor 9 Outer core 10 Inner core 13 Outer core slot 16 Inner core slot 18 Notch 19, 20 Inner peripheral surface

Claims (2)

[Claims] 1. A substantially ring-shaped core is formed by a substantially ring-shaped outer core and a substantially ring-shaped inner core fitted to an inner peripheral portion of the outer core. An outer core slot into which a pre-wound coil is inserted is formed at a plurality of locations along the circumferential direction, and an inner core slot into which a pre-wound coil is inserted is formed on the outer peripheral side of the inner core in the circumferential direction. A single-phase AC motor formed at a plurality of locations along the line. 2. The single-phase AC motor according to claim 1, wherein a cutout is provided in the inner core at a position corresponding to an outer core slot of the outer core.