JPH07250445A - Stator - Google Patents

Abstract

PURPOSE:To provide a stator, which can simplify the, circuit pattern on a PC board even if the number of phases and the number of poles are increased and the operating state of a motor is diversified in the stator, wherein a printed circuit board is provided at the upper part of an iron core, on which resin is pre-molded. CONSTITUTION:A recess part 30 is provided at the upper surface of an iron core by using a pre-molded resin. Two or more inserting holes 26 are provided on a printed circuit board 22. A rod-shaped conductor is bent, and a coil connecting pin 28 having a plug-in part 29 and two or more inserting parts 31 is formed. The plug-in part 29 of the coil connecting pin 28 is arranged in the recess part 30 of the iron core 12. The two or more inserting parts 31 of the coil connecting pin 28 are inserted into the inserting holes 26 of the printed circuit board 22 respectively. The coil connecting pin 28 and a coil outgoing line 20 of a coil winding 18 arranged on the iron core 12 are electrically connected. At least one inserting part 31 and a corresponding conductor pattern 24 on the printed circuit board 22 are electrically connected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motor stator.

[0002]

2. Description of the Related Art Conventionally, a printed circuit board (hereinafter referred to as a PC board) is attached to a stator for connecting a coil wound around a stator of an electric motor and an external terminal. Has a connection terminal to the outside.

For example, as shown in FIG. 9 (a), a stator 100 of an electric motor has a coil winding 103 wound around an iron core 101 pre-molded with a resin 102, and a single rod-shaped conductor. The coil connecting pin 104 made of is vertically embedded in the resin 102. And the coil winding 103
The coil lead wire 105 from the coil connection pin 104
P wound around the lower part of the core and arranged above the iron core 101
The upper end of the coil connecting pin 104 is inserted through the C plate 106, and the coil connecting pin 104 and the corresponding conductor pattern 107 on the PC plate 106 are electrically connected at the inserted portion.

In the stator 100 of this electric motor, the coil connecting pin 104 has a coil winding 103 and a P corresponding thereto.
The conductor pattern 107 on the C plate 106 is electrically connected, and the PC plate 106 is positioned and fixed to the upper portion of the stator 100.

[0005]

However, the above-mentioned stator 100 has a problem that the circuit pattern of the PC board becomes very complicated when the number of phases or poles of the stator increases. .

For example, as shown in the plan view of the PC board of FIG. 9B, the conductor pattern 107 connected to the coil connection pin 104 must intersect with the other conductor pattern 108 because of the circuit pattern of the PC board. If not, the conductor pattern 1 is formed by using the conductor 109 coated with an insulator on one circuit.
07, or connect two PC boards (not shown) and connect one conductor pattern to the upper PC.
I had to bypass the board and make an electrical connection.

When the circuit becomes complicated in this way, the noise resistance is lowered due to the routing of the circuit pattern, the cost is increased due to the increase in the number of parts due to the use of conductors and the multilayered PC board, and it is difficult to downsize the motor. was there.

Therefore, in view of the above problems, the present invention can simplify the circuit pattern of the PC board even when the number of phases and the number of poles are increased or the operating states of the electric motor are diversified. I will provide a.

[0009]

The stator of the present invention is a stator in which a printed circuit board is provided on an upper portion of an iron core pre-molded with resin, and a recess is provided on the upper surface of the iron core by a pre-molded resin, The circuit board is provided with two or more insertion holes, the rod-shaped conductor is bent to form a coil connection pin having an insertion portion and two or more insertion portions, and the insertion portion of the coil connection pin is formed into the iron core. Placed in the recess of
The two or more insertion parts of the coil connection pin are respectively inserted into the insertion holes of the printed circuit board to electrically connect the coil connection pin and the coil lead wire of the coil winding wound around the iron core, In addition, at least the one insertion portion and the corresponding conductor pattern on the printed circuit board are electrically connected.

[0010]

According to the stator of the present invention, the coil connecting pin made of a conductor for electrically connecting the coil lead wire from the coil winding and the corresponding conductor pattern on the PC board,
Since two or more PC boards are inserted, and at least one of the insertion sections is electrically connected to the corresponding conductor pattern, the electrical connection section should be determined according to the circuit design on the PC board. You can

If the number of the electrical connecting portions is two or more, these coil connecting pins located below the PC board become a part of the circuit configuration.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1A is a partially cutaway perspective view showing a main part of a stator 10 according to an embodiment (first embodiment) of the present invention.

Reference numeral 12 is an annular iron core formed by laminating annular thin electromagnetic steel plates. The inner peripheral portion of the iron core 12 has a plurality of tooth-shaped projections 16 corresponding to the poles protruding toward the center thereof in the circumferential direction, and the entire iron core 12 is premolded with a resin 14.

Reference numeral 18 is a coil winding wound around the tooth-like protrusion 16. A coil lead wire 20 is drawn out from each coil winding 18.

Reference numeral 28 is a coil connecting pin. The coil connecting pin 28 is formed by bending a single rod-shaped conductor at three locations to form a substantially inverted h-shape. The insertion portion 29 is inserted into the recess 30 formed on the upper surface of the premolded resin 14. Is inserted and fixed. The recessed portion 30 has the same shape as the insertion portion 29 and is slightly larger so that the insertion portion 29 of the coil connection pin 28 having a predetermined shape can be inserted and is fixed to some extent just by inserting. preferable.

Further, one recess 30 is provided for each tooth-like protrusion 16, and one coil connecting pin 28 is provided in each recess 30. All the coil connecting pins 28 correspond to each other. The coil lead wire 20 from the coil winding 18 is electrically connected.

Reference numeral 22 designates the pre-molded iron core 12
PC board placed above the pre-molded resin 14
It is mounted on the inner peripheral wall 14a and the outer peripheral wall 14b formed by. A conductor pattern of a circuit corresponding to the number of phases and the number of poles of the electric motor and its operating state is formed on the PC board 22. The conductor patterns 24, 24 that are electrically connected to the coil winding 18 have coil connecting pins 2 at their ends.
8, the connection pin insertion hole 26 through which the insertion portions 31, 31 are inserted,
Has 26.

Two insertion portions 31 of the coil connecting pin 28,
Reference numeral 31 is inserted through the two connection pin insertion holes 26, 26 provided in the PC board 22, respectively, and fixed there by soldering, and the conductor patterns 24, 24 on the PC board 22.
Is electrically connected to. Also, the coil connecting pin 28
The coil lead wire 20 is wound around one side 28a near the coil winding 18, and is fixed by soldering and is electrically connected to the coil winding 18.

As shown in the enlarged plan view of the main part of the PC board 22 of FIG. 1B, two connection pin insertion holes 26, 26 are provided.
Since the insertion portions 31, 31 of the coil connection pin 28 are inserted in and are electrically connected to each other, the PC board 22
The other conductor pattern 32 is provided between the conductor patterns 24, 24 above.
However, since the conductor pattern 24 is electrically connected to the lower side of the PC board 22 via the coil connecting pin 28 and is also electrically connected to the coil winding 18, As shown in the figure, one circuit is connected with a conductor covered with an insulator across other conductor patterns, or two PC boards are stacked and one conductor pattern is diverted to the upper PC board for connection. You don't have to.

2 to 8 show another embodiment of the present invention (second to second).
Example 8).

In FIG. 2, one coil connecting pin 28 made of a conductor is bent at two places to form a vertically long rectangular shape with the upper side missing.

In FIG. 3, one coil connecting pin 28 made of a conductor is bent at five places to form a substantially Y shape. In (c), the insertion portion 3 of the coil connection pin 28 inserted through the connection pin insertion hole 26 on the outer peripheral side of the stator 10.
The conductor pattern 24 electrically connected to 1 is formed to extend from the connection pin insertion hole 26 to both sides.

In FIG. 4, one coil connecting pin 28 made of a conductor is bent at two places to form a substantially square shape with the upper side missing. Insertion portion 29 of the coil connection pin 28
Is located below the coil winding 18. As will be described later, this can be carried out in the same manner as the other embodiments because the coil winding 18 is wound and then mounted after the coil connecting pin 28 is inserted into the recess 30.

In FIG. 3C, reference numeral 34 is a PC board 22.
It is the capacitor arranged above. In this way, the conductor patterns 24, 24 electrically connected to the coil connection pin 28
In the case where a complicated circuit is formed between the two, it is desirable to adopt the method of the present embodiment because the space between the conductor patterns 24, 24 can be widened.

In FIG. 5, one coil connecting pin 28 made of a conductor is bent at two places to form a vertically long rectangular shape with the upper side missing. Connection pin insertion holes 26, 26
Are arranged along the circumferential direction of the stator 10.

In FIG. 6, one coil connecting pin 28 made of a conductor is bent at seven places to have a substantially W shape, and three connecting pin insertion holes 26, 26 of the PC board 22 are shown. ,
26, three insertion parts 31, 3 of the coil connection pin 28
1 and 31 are inserted.

In FIG. 7, one coil connecting pin 28 made of a conductor is bent at four places to form a vertically long rectangular shape in which the upper side is missing and a folded portion is formed at the bottom corner. The coil winding 18 is wound around and attached to the transfer portion 36 between the tooth-like projections 16, 16.

In FIG. 8, one coil connecting pin 28 made of a conductor is bent at four places so that two folded portions project upward. The coil winding 18 is shown in FIG.
Similar to the embodiment described above, it is wound around and attached to the transfer portion 36 between the tooth-like projections 16, 16.

In the present invention, the coil connecting pin 28 may have various shapes other than those described above, and it is not necessary to unify into one kind of shape in one stator. Instead, various shapes can be selected according to the design of the circuit pattern on the PC board 22.

Next, a method of manufacturing the stator 10 will be described.

On the iron core 12 formed by laminating electromagnetic steel sheets,
Pre-molding is performed with the resin 14. At that time, iron core 12
A concave portion 30 made of the pre-molded resin 14 is provided above. After that, the insertion portion 29 of the coil connecting pin 28 made of one rod-shaped conductor bent into a predetermined shape is formed into the recess 3
Insert into 0 and fix.

Next, the coil winding 18 is wound around the tooth-shaped projection 16 of the iron core 12. The coil lead wire 20 from the coil winding 18 is wound around the coil connecting pin 28 and electrically connected by soldering.

Next, the PC plate 22 is attached above the iron core 12. At that time, the PC board 22 is made up of the pre-molded resin 14
Are mounted on the inner peripheral wall 14a and the outer peripheral wall 14b, and the insertion portions 31 of the coil connection pins 28 are attached so as to be inserted through the corresponding connection pin insertion holes 26. By aligning the connection pin insertion hole 26 with the insertion portion 31 of the coil connection pin 28, accurate positioning of the PC plate 22 on the upper portion of the stator 10 can be easily performed.

After that, the coil connection pin 28 and the connection pin insertion hole 26 are fixed by soldering. The connection and fixing in the connection pin insertion hole 26 is not limited to soldering. For example, after inserting the insertion portion 31 of the coil connection pin 28 into the connection pin insertion hole 26, a push nut-shaped washer is used. Alternatively, the coil connecting pin 28 may be press-fitted into the insertion portion 31.

The coil connection pins 28 inserted through the connection pin insertion holes 26 are not necessarily all of the connection pin insertion holes 2.
In FIG. 6, it is not necessary to be electrically connected, and each coil connection pin 28 may be electrically connected at at least one place. This may be appropriately determined by the circuit pattern design of the PC board 22.

After that, the stator 1 having the PC board 22
Mold 0.

[0038]

According to the stator of the present invention, each coil connection pin has a coil connecting pin formed of a conductor for electrically connecting the coil lead wire from the coil winding and the corresponding conductor pattern on the PC board. Two or more pins are inserted into the PC board, and at least one of the insertion sections is electrically connected to the corresponding conductor pattern. Therefore, the electrical connection section is determined according to the circuit design on the PC board. You can
It is possible to deal with a complicated PC board circuit configuration. Moreover, the PC board can be accurately and reliably positioned and fixed to the upper part of the stator.

Further, if the number of the electrical connecting portions is two or more, these coil connecting pins located below the PC board become a part of the circuit structure, so that the insulator on the PC board. It is not necessary to connect the conductor patterns with a conductor wire covered with, or to superpose two PC boards and detour one of the conductor patterns to the upper PC board for connection.

From the above, the circuit pattern of the PC board can be simplified even if the number of phases or poles is increased, or the operating states of the motor are diversified, and the use of conductors and the multi-layering of the PC board are possible. It is possible to reduce the number of parts associated with the above. Also, P
The degree of freedom in the circuit design of the C plate is high, and it is possible to prevent the noise resistance from decreasing due to the routing of the circuit pattern. Therefore, it is possible to reduce the cost and improve the reliability of the electric motor.
It can also contribute to downsizing of electric motors.

[Brief description of drawings]

FIG. 1 is a stator according to an embodiment (first embodiment) of the present invention, in which (a) is a partially cutaway perspective view showing a main part thereof;
(B) is an enlarged plan view of the relevant part.

FIG. 2 is a stator according to a second embodiment of the present invention,
(A) is an enlarged vertical sectional view of an essential part, (b) is an AA sectional plan view of (a), and (c) is an enlarged plan view of an essential part.

FIG. 3 is a stator according to a third embodiment of the present invention,
(A) is an enlarged vertical sectional view of an essential part, (b) is an AA sectional plan view of (a), and (c) is an enlarged plan view of an essential part.

FIG. 4 is a stator according to a fourth embodiment of the present invention,
(A) is an enlarged vertical sectional view of an essential part, (b) is an AA sectional plan view of (a), and (c) is an enlarged plan view of an essential part.

FIG. 5 is a stator according to a fifth embodiment of the present invention,
(A) is an enlarged vertical cross-sectional view of a main part, (b) is a plan view of A-A cross section of (a), (c) is a vertical cross-sectional view of BB cross section of (a),
(D) is an enlarged plan view of a main part.

FIG. 6 is a stator according to a sixth embodiment of the present invention,
(A) is an enlarged vertical sectional view of an essential part, (b) is an AA sectional plan view of (a), and (c) is an enlarged plan view of an essential part.

FIG. 7 is a stator according to a seventh embodiment of the present invention,
(A) is an enlarged vertical sectional view of an essential part, (b) is an AA sectional plan view of (a), and (c) is an enlarged plan view of an essential part.

FIG. 8 is a stator according to an eighth embodiment of the present invention,
(A) is an enlarged vertical sectional view of an essential part, (b) is an AA sectional plan view of (a), and (c) is an enlarged plan view of an essential part.

9A and 9B show a conventional stator, in which FIG. 9A is a partially cutaway perspective view showing an essential part thereof, and FIG. 9B is an enlarged plan view of an essential part thereof.

[Explanation of symbols]

 10 ...... Stator 12 ...... Iron core 14 ...... Pre-molded resin 18 ...... Coil winding 20 ...... Coil lead wire 22 ...... Printed circuit board 24 ...... Conductor pattern 26 ...... Insertion hole 28 ...... Coil connection pin 29 …… Insertion part 30 …… Concave part 31 …… Insertion part

Claims (1)

[Claims] 1. A stator having a printed circuit board provided on an upper portion of an iron core pre-molded with resin, wherein a recess is provided on the upper surface of the iron core by a pre-molded resin, and two or more insertion holes are provided in the printed circuit board. A rod-shaped conductor is bent to form a coil connection pin having an insertion portion and two or more insertion portions, and the insertion portion of the coil connection pin is arranged in the recess of the iron core. The two or more insertion parts are inserted into the insertion holes of the printed circuit board, and the coil connection pin and the coil lead wire of the coil winding wound around the iron core are electrically connected, and at least the A stator characterized in that one insertion portion and a corresponding conductor pattern on the printed circuit board are electrically connected.