JP2000166196A - Stator of motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator of a motor which enables the attachment of a capacitor to a printed board, improvement in productivity and the reduction in the number of components. SOLUTION: Conductive pin attachment parts 8a in the upper part of an inner wall on which conductive pins 9a are placed are molded at left and right positions asymmetrically in a main winding bobbin, and an auxiliary winding bobbin to form a part where the conductive pins 9a are separated from each other between the main winding and the auxiliary winding which are adjacent to each other and a capacitor 12 is placed in the part. With this constitution, soldering of the capacitor can be practiced mechanically and only two lead wires 13 for power supply are necessary.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small motor stator used for driving a fan such as a ventilation fan.

[0002]

2. Description of the Related Art A conventional stator for a motor of this type will be described with reference to FIGS.

As shown in FIG.
14 or auxiliary windings 115 are wound, and bobbins 103 to which conductive pins 107a and 107b are attached to hold the start and end of these windings are attached to the tooth core 101 in which a required number of laminations are substantially cross-shaped. The ring-shaped yoke iron core 102 is fitted around the outer periphery of the tooth iron core 101, and the bobbin 1
A printed circuit board 108 on which an excessive temperature rise prevention device 109, three power supply lead wires 110 and a jumper wire 111 are arranged and an electrical connection with each winding is formed above the conductive pins 107a and 107b. And an operation capacitor 112 is soldered to two of the three lead wires 110, that is, the leading ends of the lead wires 110b and 110c on the side opposite to the printed circuit board in parallel with the auxiliary winding 115. The electrical connection is made by the above method, and the soldered portion is housed in a housing 113 made of resin for electrical insulation. Also,
The four bobbins 103 around which the main winding 104 and the auxiliary winding 105 are wound have the same shape, and a conductive pin mounting portion 106 is formed on each of the inner wall portion 104 and the outer wall portion 105 of the bobbin 103 to form a conductive member. The configuration was such that the pins 107a and 107b were attached.

[0004]

In such a conventional motor stator, a total of eight conductive pins 107 on a printed circuit board 108 mounted above the bobbin 103 are soldered to form a pair of main pins. Electrical connection of the winding 114, the auxiliary winding 115, the over-temperature prevention device 109, and the lead wire 110 is made, and relatively easy assembling is realized. However, in such a configuration, two conductive pins 107a and 107b per bobbin 103 are located at substantially equal intervals on the printed circuit board 108, so that the capacitor 112 can be arranged on the printed circuit board 108. This is difficult, and since the capacitor 112 is attached to the tips of the lead wires 110b and 110c, the number of working steps increases and the capacitor 1
There is a problem that the number of components such as the lead wire 110c and the storage case 113 used only for the connection of No. 12 increases.

In forming the polarity of the electric motor,
The start of winding of a pair of main windings 114 facing each other, that is, between the conductive pins 107a, the start of winding of the auxiliary winding 115, that is, between the conductive pins 107a, and the end of each winding, that is, 107
Although copper foil (not shown) is formed on the printed circuit board 108 to electrically connect the lead wire 110 to the lead wire 110, the jumper wire 111
There is a problem of using more than one, more convenient productivity,
Also, there has been a demand for rationalization along with a reduction in the number of parts.

The present invention has been made to solve the above-mentioned conventional problems, and enables an operation capacitor to be mounted on a printed circuit board, thereby improving productivity.
A first object is to provide a motor stator that can reduce the number of parts.

It is a second object of the present invention to provide a motor stator that can be securely mounted on a printed circuit board even when capacitors having different shapes and dimensions are used.

[0008]

In order to achieve the first object, a stator for an electric motor according to the present invention comprises a plurality of laminated toothed iron cores forming substantially cross-shaped magnetic poles and a toothed iron core. A ring-shaped yoke portion iron core fitted to the iron core to form a magnetic path, and a conductive pin wound with a winding and holding the start and end of the winding and holding the winding, A pair of main winding bobbin A and auxiliary winding bobbin B to be mounted on the core, and a mounting hole for a capacitor and an engaging hole for a conductive pin are provided. In addition to arranging the lead wire and the operation capacitor, forming the electrical connection with each winding,
The bobbin A and the bobbin B are composed of a printed circuit board mounted via the conductive pins, the bobbin A and the bobbin B are wound around a winding, and an outer wall and an inner wall that prevent the winding from falling down,
The mounting portions of the conductive pins are integrally formed of resin on the outer wall portion and the upper portion of the inner wall portion, and the mounting portions of the conductive pins provided on the inner wall portion are formed in the bobbin A and the bobbin B so as to be left and right. The configuration is as follows.

According to the present invention, a space where a capacitor can be arranged between a main winding and an auxiliary winding adjacent to each other on a printed circuit board can be secured, and the electric connection of the arranged capacitor can be secured on the printed circuit board. Mechanical soldering work becomes possible, and workability is improved, and at the same time, a motor stator that can reduce the number of parts is obtained.

A second means for achieving the first object is to connect an excessive temperature rise prevention device arranged on a printed board to be mounted via conductive pins between a pair of main windings on an electric circuit. This is a configuration made up of:

According to the present invention, since the electrical connection between the pair of main windings is formed without obstructing the operation of the overheating prevention device, the number of circuit connection parts can be reduced. A motor stator that can be obtained is obtained.

Means for achieving the second object are:
One of the mounting holes of the capacitor is formed in a long hole shape in the width direction of the capacitor, and the other is formed in at least two circular shapes in the width direction of the capacitor.

According to the present invention, it is possible to obtain a motor stator that can be securely mounted on a printed circuit board even when using capacitors having different shapes and dimensions due to differences in the capacitance and the like of the capacitors.

[0014]

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a toothed iron core having a plurality of laminated magnetic poles and a ring-shaped yoke which is fitted to the toothed iron core to form a magnetic path. An iron core, a winding is wound around, and a conductive pin is provided to hold the start and end of the winding. The pair of main winding bobbins A and the auxiliary winding are mounted on the tooth core. Bobbin B, a mounting hole for the capacitor and an engaging hole for the conductive pin, an overheating prevention device, two power supply lead wires and a capacitor for operation are arranged, and an electric connection between each winding is provided. The bobbin A and the bobbin B are wound around a winding, an outer wall and an inner wall for preventing the winding from falling down, The mounting portion of the conductive pin is integrally formed of resin on the upper portion of the outer wall portion and the inner wall portion, Of the conductive pins provided on the inner wall of the bobbin A and the bobbin B are formed so as to be left and right differently, and between the adjacent main winding and auxiliary winding on the printed circuit board, There is a place where the positions of the conductive pins attached to the inner wall of the bobbin are separated, a space where the capacitor can be arranged can be secured, and the operation of soldering the capacitor on the printed circuit board can be performed mechanically.

[0015] Further, the overheating prevention device disposed on the printed circuit board is configured to be connected between a pair of main windings on an electric circuit. It has an effect that a connection can be formed.

One of the mounting holes of the capacitor is formed in a long hole shape in the width direction of the capacitor, and the other is formed in at least two circular shapes in the width direction of the capacitor. By selecting one of the two mounting holes and the other of the two mounting holes, it is possible to cope with capacitors having different shapes and dimensions.

[0017]

(Embodiment 1) As shown in FIGS. 1 to 3, a plurality of toothed iron cores 1 forming magnetic poles are laminated in a substantially cross shape, and a pair of main windings are respectively formed on the toothed iron cores 1. A bobbin A3 around which the winding 15 is wound and a bobbin B4 around which the auxiliary winding 16 is wound are mounted. A ring-shaped yoke portion core 2 forming a magnetic path around the outer periphery of the tooth portion core 1 is press-fitted. Mated. Above the bobbin A3 and the bobbin B4, an overheat prevention device 1
One and two power supply lead wires 13 and a jumper wire 14 for connecting an electric circuit, and an operation capacitor 12 is mounted on the mounting holes 18a and 18b on the upper surface and forms an electrical connection with each winding. The printed circuit board 10 provided with a copper foil (not shown) is attached to the engagement hole 17 via the conductive pins 9a and 9b. The bobbin A3 and the bobbin B4 include a winding part 5 for winding a winding, an inner wall part 6 and an outer wall part 7 for preventing the winding from falling down, and a conductive pin 9a on the upper part of the inner wall part 6 and an outer wall part 7. The conductive pin mounting portions 8a and 8b for mounting the conductive pins 9b on the upper portion are formed integrally with resin.

Here, the inner wall portion 6 where the conductive pin 9a is located
The conductive pin mounting portion 8a above the bobbin A3 and the bobbin B
4 has a positional relationship between left and right. That is,
In the case of the bobbin A3, when viewed from the outer wall 7 toward the inner wall 6,
The conductive pin mounting portion 8a is provided on the left side of the center line, whereas the bobbin B4 is provided on the right side when viewed similarly.

In the above configuration, the bobbin A is provided between the adjacent main winding 15 and auxiliary winding 16 on the printed circuit board 10.
3. There is a place where the positions of the conductive pins 9a attached to the inner wall portions 6 of the bobbins B4 are separated from each other, so that a space where the capacitor 12 can be placed can be secured, and the capacitor placed on the printed circuit board 10 is electrically connected. Soldering work can be performed mechanically,
Only two lead wires 13 for power supply are required to be attached to the printed circuit board 10, and since the soldered portion of the capacitor 12 is on the printed circuit board 10, no special insulating means is required.

(Embodiment 2) As shown in FIG. 4, an overheating prevention device 11 arranged on the lower surface of a printed circuit board 10 is connected between a pair of main windings 15 on an electric circuit. Things.

In the above configuration, even if the over-temperature prevention device 11 is located between the main windings 15 in the electric circuit, it can cut off the current during operation, and at the same time, the electric connection between the pair of main windings 15 facing each other. Connection can be formed.

(Embodiment 3) As shown in FIG. 5, a mounting hole 1 for mounting a capacitor 12 provided on a printed circuit board 10 is provided.
Each of the mounting holes 8a and 18b has a configuration in which one mounting hole 18a has a long hole shape in the width direction of the capacitor 12, and the other mounting hole 18b has a circular shape and is provided at two places in the width direction of the capacitor 12.

In the above configuration, two mounting holes 18b are provided.
The two or more types of capacitors having different shapes can be securely attached to one of the positions and the other attachment hole 18a.

[0024]

As is clear from the above embodiments, according to the present invention, it is possible to mount an operating capacitor on a printed circuit board, thereby improving productivity and reducing the number of parts. An electric motor stator can be provided.

Further, even when capacitors having different shapes and sizes are used, the capacitors can be reliably mounted on a printed circuit board.

[Brief description of the drawings]

FIG. 1 is a plan view of a stator of a motor according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a state where a printed circuit board of a stator of the electric motor according to the first embodiment is removed.

FIG. 3 is a perspective view of a bobbin A to which the conductive pins according to the first embodiment are attached.

FIG. 4 is an electrical connection diagram of the electric motor according to the second embodiment.

FIG. 5 is a partially enlarged view of a printed circuit board to which the capacitor according to the third embodiment is mounted.

FIG. 6 is a plan view of a conventional motor stator.

FIG. 7 is a plan view showing a state where a printed circuit board of a stator of a conventional electric motor is removed.

FIG. 8 is an electrical connection diagram of a conventional motor.

[Explanation of symbols]

 Reference Signs List 1 tooth iron core 2 yoke iron core 3 bobbin A 4 bobbin B 5 winding part 6 inner wall part 7 outer wall part 8a, 8b conductive pin mounting part 9a, 9b conductive pin 10 printed circuit board 11 overheat prevention device 12 capacitor DESCRIPTION OF SYMBOLS 13 Lead wire 14 Jumper wire 15 Main winding 16 Auxiliary winding 17 Engagement hole 18a, 18b Mounting hole

Claims (3)

[Claims] 1. A toothed iron core in which a plurality of substantially circular magnetic poles are laminated, a ring-shaped yoke iron core fitted to the toothed iron core to form a magnetic path, and a winding. Is wound, has a conductive pin that entangles and holds the start and end of this winding, and each of a pair of main winding bobbins A and auxiliary winding bobbins B attached to the tooth core, A mounting hole for a capacitor and an engaging hole for a conductive pin are provided, an overheating prevention device, two power supply leads and a capacitor for operation are arranged, and an electrical connection with each winding is formed. The bobbin A and the bobbin B are wound around a winding, an outer wall and an inner wall for preventing the winding from falling down, and the outer wall and the inner wall. The mounting part of the conductive pin is integrally molded with resin on the upper part,
Among them, the stator of the electric motor is formed such that the mounting portions of the conductive pins provided on the inner wall portion are formed in the bobbin A and the bobbin B so as to be left and right. 2. An electric motor stator according to claim 1, wherein an overheating prevention device arranged on a printed circuit board mounted via conductive pins is connected between a pair of main windings on an electric circuit. 3. The fixing of an electric motor according to claim 1, wherein one of the mounting holes of the capacitor is formed in an elongated hole shape in the width direction of the capacitor, and the other is formed in at least two circular shapes in the width direction of the capacitor. Child.