JP2003164093A - Connection method and structure of motor lead wire, and production method of three-phase motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection method of a motor lead wire which makes a compact shaft length of a motor and can be welded by heating. <P>SOLUTION: A plurality of a neutral conductor 5a are placed in parallel in a roughly U shape bus bar 6<SB>1</SB>which is made of an electroconductive material. The neutral conductor 5a is retained by the bus bar 6<SB>1</SB>. The bus bar 6<SB>1</SB>is heated by the predetermined current through electrodes 7a and 7b and an insulation covering film of a bonding part between the bus bar 6<SB>1</SB>and the neutral conductor 5a is removed. The boundary surface 5d is heated by the predetermined current to the bus bar 6<SB>1</SB>through the neutral conductor 5a in which the insulation covering film is removed. The bus bar 6<SB>1</SB>and the neutral conductor 5a are joined together by heat welding. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor lead wire connecting structure suitable for connecting lead wires of a motor such as a three-phase motor, for example, a large number of neutral wires in a stator winding, to each other.

[0002]

2. Description of the Related Art FIG. 1 is a front view showing an example of a connection structure of neutral wires and a stator portion of a motor in a stator winding of a conventional three-phase motor, and FIG. 2 is a side view of the winding portion of FIG. It is a figure.

Usually, the coil ends 1a of the neutral wire 1 as a lead wire in the stator winding of a three-phase motor are bundled and connected to each other to form a neutral point 1b, as shown in FIG. . This neutral point is joined by mechanical joining such as lapping, crimping, soldering using a brazing material, and welding. The neutral wire and the neutral point thus connected are arranged adjacent to each other in the axial direction of the coil assembly 5 (horizontal direction in FIG. 2) as shown in FIGS. 1 and 2, but the lead wires are bundled together. As a result, the axial length of the motor, that is, the length in the left-right direction in FIG. 2 is increased by the space LA for arranging the neutral points.

[0004]

However, when the number of parallel windings is increased, such as in a motor for an electric vehicle, the number of neutral wires to be bundled and the neutral wires connected by bundling the neutral wires. The points become large, and the increase in motor shaft length becomes remarkable. In the case of motors for electric vehicles, etc., the mounting space in the vehicle is limited, so
In particular, it is desired to reduce the neutral point in the axial length direction and to shorten the axial length of the motor as much as possible.

Therefore, it is desired that the neutral wires are not bundled in order to reduce the neutral point in the axial direction, and that the neutral wires are compactly joined, but the neutral wires are not bundled. The downsizing has a problem that it is particularly difficult to perform heat welding such as applying heat for connection, so-called fusing or resistance brazing.

Therefore, the present invention provides a method for connecting a motor lead wire which sandwiches motor lead wires arranged in parallel by connecting terminals and conducts a predetermined current to the connection terminal to generate heat, thereby solving the above-mentioned problems. That is the purpose.

[0007]

The present invention according to claim 1 (see, for example, FIGS. 3 to 9) connects a plurality of motor lead wires (5a) having an insulating coating on the outer periphery thereof to each other. In a method of connecting a motor lead wire (5a) for electrical conduction, a connection terminal (6) made of a conductive material is provided, and the plurality of motor lead wires (5a) are arranged in parallel to the connection terminal (6). The connection terminal (6)
The motor lead wire (5a) arranged in parallel is sandwiched, a predetermined current is conducted to the connection terminal (6) to heat the connection terminal (6), and the connection terminal (6) and the motor lead. A method of connecting a motor lead wire (5a) is characterized in that the wire (5a) is joined.

According to a second aspect of the present invention (see, for example, FIGS. 6 to 9), the connection terminal (6) and the motor lead wire (5a) are generated by heating the connection terminal (6).
The insulating coating on the joint portion (5c) with the connection terminal (6) is removed, and a predetermined current is conducted to the connection terminal (6) through the motor lead wire (5a) from which the insulation coating has been removed. The boundary surface (5) with the motor lead wire (5a)
The method of connecting a motor lead wire (5a) according to claim 1, wherein the connection terminal (6) is joined to the motor lead wire (5a) by heating d).

According to a third aspect of the present invention (see, for example, FIGS. 6 and 7), the connection terminal (6 ₁ ) is formed in a U shape.
Wherein the U-shaped connection terminal ₍₆₁₎ to sandwich the tip portion (5c) of the motor lead (5a) comprising, in the connection method according to claim 1 or 2 motor leads according (5a).

The present invention according to claim 4 (see, for example, FIG. 8 and
9), the connection terminal (6) is a separate two plate
(6a_Two, 6b_Two), The two plate-like connection terminals
(6a_Two, 6b_Two) By the motor lead wire (5a)
Holding the tip part (5c) of the
Terminal (6a_Two, 6b _Two) Electrical conductor (8)
The connection terminal (6a_Two, 6b_Two) To
A predetermined current is conducted through the conductor (8) to make the contact.
Continuation terminal (6a_Two, 6b_Two) By heating
Connection terminal (6a_Two, 6b_Two) And the motor lead wire
Remove the insulating coating on the joint (5c) with (5a)
The conductor (8) is removed, and the connection terminal (6
a_Two, 6b_Two) The motory from which the insulation coating has been removed.
A predetermined current is conducted through the lead wire (5a) and the two
Connection terminal (6a_Two, 6b_Two) And the motor lead wire (5
By heating the boundary surface (5d) with a),
Two connection terminals (6a_Two, 6b_Two) And the motor lead
The motory according to claim 1, wherein the wire (5a) is joined.
There is a method for connecting the lead wire (5a).

According to a fifth aspect of the present invention (see, for example, FIGS. 7 and 9), when the motor lead wire (5a) is clamped by the connection terminal (6), the connection terminal (6) and the motor Brazing material (9) at the joint with the lead wire (5a)
By heating the connection terminal (6) with the interposition of the above, the brazing material (9) is welded to the connection terminal (6).
The motor lead wire (5a) according to claim 1, wherein the motor lead wire (5a) is joined to the motor lead wire (5a).
Connection method.

The present invention according to claim 6 (see, for example, FIGS. 3 to 9), the connection terminal () connected by using the method for connecting the motor lead wire (5a) according to any one of claims 1 to 5 6) and the motor lead wire (5a) are arranged by connecting three in the parallel direction.
There is a method of manufacturing a phase motor.

According to a seventh aspect of the present invention (see, for example, FIGS. 3 to 9), a motor for electrically connecting a plurality of motor lead wires (5a) having an insulating coating formed on the outer periphery thereof to each other for electrical conduction. The lead wire (5a) connection structure is provided with a connection terminal (6) made of a conductive material, in which the plurality of motor lead wires (5a) can be arranged in parallel and can be sandwiched, and the connection terminal (6) is provided. A predetermined current is conducted to heat the connection terminal (6) to remove the insulation coating, and the connection terminal (6) is connected to the motor lead wire (5a) from which the insulation coating has been removed. An electric current is conducted to connect the connection terminal (6) and the motor lead wire (5a).
The motor lead wire connection structure is characterized in that the connection terminal (6) and the motor lead wire (5a) are joined by heating the boundary surface (5d) of the.

The reference numerals in parentheses are for the purpose of contrasting with the drawings, but this is for convenience of understanding the invention, and is not limited to the construction of the claims. It has no effect.

[0015]

According to the present invention according to claim 1, a plurality of motor lead wires are arranged in parallel to the connection terminals made of a conductive material, and the motor lead wires arranged in parallel are sandwiched by the connection terminals, Since a predetermined current is conducted to the connection terminal to heat the connection terminal and the connection terminal and the motor lead wire are joined, the motor shaft length can be made compact, and the connection terminal and the motor lead wire can be joined by heat welding. Can be joined.

According to the second aspect of the present invention, by heating the connection terminal, the insulating coating on the joint between the connection terminal and the motor lead wire is removed, and the motor terminal is removed. A predetermined current is conducted through to heat the boundary surface between the connection terminal and the motor lead wire,
Since the connection terminal and the motor lead wire are joined together, the connection terminal and the motor lead wire can be joined together by heat welding.

According to the third aspect of the present invention, the connecting terminal is formed in a U shape, and the tip portion of the motor lead wire is sandwiched by the U-shaped connecting terminal, so that the axial length of the motor can be made compact. In addition, the connection terminal and the motor lead wire can be joined by heat welding, and the connection terminal can be easily formed.

According to the fourth aspect of the present invention, the terminal portion of the motor lead wire is sandwiched by the two plate-like connecting terminals, the conductor is arranged, and a predetermined current is conducted through the conductor to connect the connecting terminals. To remove heat from the joint to remove the insulation coating, remove the conductor, and conduct a predetermined current through the motor lead wire from which the insulation coating has been removed to generate heat at the two boundary surfaces. And the motor lead wire are joined together, the motor shaft length can be made compact, and the connection terminal and the motor lead wire can be joined together by heat welding, so that the connection terminal and the motor lead wire can be securely connected. Can be joined.

According to the fifth aspect of the present invention, when the motor lead wire is sandwiched by the connection terminals, a brazing material is interposed at the joint between the connection terminal and the motor lead wire to generate heat in the connection terminal. Since the connecting terminal and the motor lead wire are joined by welding the brazing material, the motor shaft length can be made compact, and the connecting terminal and the motor lead wire can be joined by heat welding. Meanwhile, the connection terminal and the motor lead wire can be brazed.

According to the present invention of claim 6, claim 1
Since the connection terminal and the motor lead wire, which are connected by using the motor lead wire connecting method according to any one of 1 to 5, are arranged so as to be connected in parallel to each other, the axial length of the three-phase motor can be made compact. It is possible to obtain a three-phase motor in which the connection terminal and the motor lead wire can be joined by heat welding.

According to the present invention of claim 7, a connection terminal made of a conductive material, in which a plurality of motor lead wires are arranged in parallel and sandwiched, conducts a predetermined current to heat the connection terminal to insulate the insulation. And the connection terminal is joined to the motor lead wire by heating the boundary surface by conducting a predetermined current through the motor lead wire from which the insulation coating has been removed to the connection terminal. The axial length can be made compact, and the connection terminal and the motor lead wire can be joined by heat welding.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION <First Embodiment> FIG. 3 is a front view showing an example of a stator of a three-phase motor to which the present invention is applied, and FIG. 4 is a side view of a winding portion of FIG. Figures and 5
The side view which shows an example of the connection aspect of the winding part of a neutral wire, FIG. 6 is a figure which shows the bus-bar which concerns on 1st Embodiment, and its joint part, (a) is a side view, (b) is a plane. FIG. 7 and FIG. 7 are views showing a part of the joint portion of FIG. 6 changed, (a)
Is a side view and (b) is a plan view.

The stator 2 of the three-phase motor is shown in FIGS.
As shown in FIG. 3, the stator core 3 has an annular shape as a whole, and inside the stator core 3, slots in which coils are arranged are formed radially around the center CL of the stator core 3. . Two coil assemblies 5 of U-phase, V-phase and W-phase are inserted and installed in the slots of each stator core 3.
The neutral wire 5a as the motor lead wire of the coil forming each of the phases has a shape in which the end portion 5b wraps the outer circumference of the coil assembly 5 in the radial direction from the inner circumference side to the outer circumference side of the stator core 3. In addition, the neutral wires 5a are laid out one by one so as not to overlap each other.

As shown in FIG. 3, the neutral wires 5a are arranged toward the outer peripheral side of the stator core 3 for each phase of each coil assembly 5, and the neutral wires 5a for each phase are arranged. The bus bar 6 is connected to a bus bar 6 as a connection terminal provided on the outer peripheral portion of the coil 5 of the stator core 3 described later in such a manner that the bus bar 6 forms a neutral point of the three-phase coil assembly 5.
In addition, the bus bar 6 includes the stator 2 and the coil assemblies 5
Two are provided in a form corresponding to.

As shown in FIG. 6B, for example, the bus bar 6 is made of a substantially strip-shaped conductive material as a whole, and the bus bar 6 is, as shown in FIG. 4 and FIG. It is bent and formed in an arc shape such that the longitudinal direction is along the outer peripheral portion of the stator core 3. In addition, the bus bar 6 has three positions corresponding to the respective phases of the coil assembly 5 and the neutral wire 5a.
Each one of the joining portions 5c at the tip is joined in parallel and electrically connected to the bus bar 6.

Since the stator 2 and the like have the above-mentioned structure, the coil assembly 5 is assembled and arranged on the stator 2.
When assembling the phase motor, the coils of the three phases forming the coil assembly 5 are inserted and installed in the slots of the stator core 3. At this time, it is necessary to connect the neutral wires 5a of the respective phases of the coil assemblies 5 to each other to form a neutral point. This work is performed as follows.

That is, when each coil of the coil assembly 5 is inserted and installed in the slit of the stator core 3, the bus bar 6 is arranged on the inner peripheral portion of the stator core 3 as shown in FIG. Radially drawn from the coil assembly 5 toward the inner peripheral portion of the stator core 3, the end portions 5b of each neutral wire 5a are arranged in parallel with the bus bar 6 by the connection method described later in detail and connected to each other, and the neutral wire is connected. 5a and bus bar 6 are electrically connected.

Thus, when all the neutral wires 5a of each phase of the coil assembly 5 are connected to the single bus bar 6,
As shown in FIG. 5, the stator core is formed by covering the bus bar 6 to which all the neutral wires 5a of the coil assembly 5 are connected in the direction of arrow A with the plurality of neutral wires 5a covering the outer periphery of the coil assembly 5. 3) It moves toward the outside and is connected and attached to the outer peripheral portion of the stator core 3. Then, many neutral wires 5a are
As shown in FIG. 3, it is connected to the bus bar 6 arranged on the outer peripheral side of the stator core 3 at the shortest distance, whereby the bus bar 6 forms the neutral point of the coil assembly 5.

The width W of the bus bar 6 in the axial direction of the stator is
As shown in FIG. 5, since the coil assembly 5 arranged on the stator core 3 is formed shorter than the protrusion amount L in the axial direction of the stator, which is the left-right direction in the figure, the bus bar 6 is smaller than the coil assembly 5. Also, the bus bar 6 forming the neutral point does not increase the axial length of the motor unlike the conventional neutral point 1b.

Further, the connection between the bus bar 6 and the neutral wire 5a is
As shown in FIGS. 3 to 5, each neutral wire 5a is a plane perpendicular to the axial direction of the stator core 3 (a plane parallel to the plane of FIG. 3).
Since it is carried out in the form of being arranged in parallel along the line (not bundled), even if the neutral wire 5a is arranged so as to cover the outer peripheral portion of the coil assembly 5, the stator 2 and therefore the
The shaft length of the motor does not increase.

Even when a plurality of coil assemblies 5 are arranged, as shown in FIG. 3, if the bus bar 6 is arranged for each coil assembly 5 so as to be located on the outer peripheral side of the coil assembly 5. Good.

[0032] Next will be described with reference to FIGS. 6 and 7 for connection between the main part bus bar ₆₁ and the neutral line 5a of the present invention. The neutral wire 5a shown in FIGS. 6 and 7 is continuously connected to the coil assembly 5 on the right side in the drawings, but the continuous portion is omitted.

As shown in FIG. 6A, the bus bar 6
₁ is formed on a side surface substantially U-shape, the form that is inserted into the U-shaped bus bar _61, the distal end portion 5c of the plurality of neutral wires 5a which insulating coating on the outer peripheral portion is formed But Figure 6
(B), the are arranged in parallel, it is held by the bus bar ₆₁ of the U-shape. In addition, a bundle of a plurality of neutral wires 5a arranged in parallel is arranged in the parallel direction (see FIG. 6).
(B) in the vertical direction), three U-phases are arranged at a predetermined interval, and each is a U-phase that is each phase of a three-phase motor,
Form V phase and W phase.

The bus bar 6₁And neutral wire 5a
When the bus bar 6 ₁At the end of neutral line 5a
U-shaped bus that is sandwiched after the end portions 5c are arranged in parallel
Bar 6₁From both sides of the electrode (from the vertical direction in Fig. 6 (a))
7a and 7b are brought into contact with each other. And from the electrodes 7a, 7b
When a predetermined current is turned on, the current is applied to the bus bar 6₁Only on
Busbar 6 passing through₁Heats up, and the tip of the neutral wire 5a
It is formed on the outer peripheral portion of the end portion (that is, the joint portion) 5c.
The insulating coating is carbonized and removed.

Thereafter, when a predetermined current is further conducted by the electrodes 7a and 7b, the tip portion 5c from which the insulating coating has been removed.
Via the electrode, that is, in the form of passing through the tip portion 5c (electrode 7
bus bar 6 so as to pass through a straight line between a and the electrode 7b)
_A predetermined current is conducted to the terminal _1, and the boundary surface 5d between the tip portion 5c of the neutral wire 5a and the bus bar 6 ₁ generates heat. Then, heat is generated on the boundary surface 5d, the neutral wire 5a and the bus bar 6 ₁ near the boundary surface 5d are welded, and the neutral wire 5a and the bus bar 6 ₁ are joined together in a so-called fusing manner. That is, the plurality of neutral wires 5a are connected to each other and electrically connected.

[0036] In the junction between the neutral line 5a and the bus bar ₆₁ as described above, the electrodes 7a, 7b along the entire length of the bus bar _{6 1} (over the vertical direction in FIG. 6 (b)) arrangement, by contacting, can be joined to the U-phase, at the same time the bus bar ₆₁ all the neutral line 5a of the V-phase and W-phase.

Further, as shown in FIG. 7, the brazing material 9 is interposed interface between the bus bar ₆₁ and the neutral point 5a,
Similarly it may work to joining the neutral line 5a and the bus bar _61. In this case as well, a predetermined current is similarly conducted to make the bus bar 6 ₁
When the heat is generated, the heat is transferred to the neutral wire 5a through the brazing filler metal 9 to remove the insulating coating on the joint portion, and a predetermined current is further conducted, so that the electric current passes through the brazing filler metal 9,
Is brazing with the brazing material 9 is heated, and the neutral line 5a and the bus bar ₆₁ is joined in a form that is so-called resistance brazing, i.e. more neutral lines 5a are connected to each other electrically It is conducted.

When performing the resistance brazing, the insulating coating on the part to be brazed may be removed in advance.

[0039] As described above, according to the method of connecting the motor leads according to the present invention, the neutral line 5a arranged in parallel without being bound into the bus bar _61, compact with respect to the axial length direction of the motor yet those capable, it is possible to perform the heat welding of the neutral line 5a and the bus bar _61.
Further, since only forming the bus bar ₆₁ in a substantially U shape, it can be easily formed the bus bar _61.

<Second Embodiment> Next, a second embodiment of the present invention will be described with reference to FIGS. 8 and 9. 8A and 8B are views showing a bus bar and a joint portion thereof according to the second embodiment. FIG. 8A is a side view, FIG. 8B is a plan view, and FIG. 9 is a partially modified joint portion of FIG. In the figure, (a) is a side view and (b) is a plan view. The neutral wire 5a shown in FIGS. 8 and 9 is continuously connected to the coil assembly 5 on the right side in the drawings, but the continuous portion is omitted. Further, in the present embodiment, the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 8A, the bus bar 6
a ₂ and 6b ₂ are formed in two separate plate shapes, and are inserted between the busbars 6a ₂ and 6b ₂ , and a plurality of neutral wires having an insulating coating formed on the outer periphery thereof. As shown in FIG. 8B, the tip portion 5c of 5a is arranged in parallel and sandwiched by the bus bars 6a ₂ and 6b ₂ . A plate-shaped conductor 8 formed to have a thickness substantially the same as that of the neutral wire 5a is provided further on the tip side of the tip portion 5c of the neutral wire 5a.
Is provided so as to be removable in the direction of arrow E-F in the figure.

Also, as in the first embodiment, a bundle of a plurality of neutral wires 5a arranged in parallel has a predetermined interval in the parallel direction (vertical direction in FIG. 8B). Have 3
Are arranged and each form a U-phase, a V-phase and a W-phase which are each phase of the three-phase motor.

The bus bars 6a ₂ and 6b ₂ and the neutral wire 5a
When connecting and, the bus bars 6a ₂ , 6 are connected as described above.
The distal end portion 5c of the neutral line 5a between b ₂ sandwiched after placement in parallel, the electrode 7a (vertical from the direction in FIG. 8 (a)) from both sides of the bus bars _6a 2, 6b _2, contacting 7b . When a predetermined current is conducted from the electrodes 7a and 7b, the current is passed through the conductor 8 to the bus bar 6
After passing over a ₂ and 6b ₂ , the bus bars 6a ₂ and 6b ₂ generate heat, and the insulating coating formed on the outer peripheral portion of the tip portion (that is, the joint portion) 5c of the neutral wire 5a is carbonized and removed. .

Then, when the conductor 8 is removed in the direction of arrow E in the figure, the portion from which the conductor 8 has been removed is opened, and the carbonized insulating coating can be removed from the portion from which the conductor 8 has been removed.

Then, by the electrodes 7a and 7b, a predetermined voltage is applied.
When the flow is conducted, the tip portion 5c with the insulating coating removed
Via the electrode, that is, in the form of passing through the tip portion 5c (electrode 7
bus bar 6 so as to pass through a straight line between a and the electrode 7b)
a_Two, 6b_TwoA predetermined current is conducted to the tip of the neutral wire 5a
Minute 5c and bus bar 6a_Two, 6b_TwoThe boundary surface 5d with
To do. Then, the boundary surface 5d generates heat, so that the boundary surface 5d is heated.
Neutral wire 5a and bus bar 6a near the interface 5d_Two, 6b_Two
Is welded, the neutral wire 5a and the bus bar 6a_Two, 6b _TwoAnd
Joined by so-called fusing, that is, multiple
The neutral wires 5a are connected to each other and electrically connected.

When the neutral wire 5a and the bus bars 6a ₂ and 6b ₂ are joined as described above, the electrodes 7a and 7a
b along the entire length of the bus bars 6a ₂ and 6b ₂ (see FIG. 8).
By arranging and contacting (in the vertical direction of (b)),
It is possible to join all the neutral wires 5a of the U-phase, V-phase and W-phase to the bus bars 6a ₂ and 6b ₂ at the same time.

Further, as shown in FIG. 9, the bus bar 6
brazing material 9 at the joint between a ₂ and 6b ₂ and the neutral point 5a.
Similarly, the neutral wire 5a and the bus bars 6a ₂ , 6
It may attempt to bonding with the b _2. Also at this time, if a predetermined current is similarly conducted to heat the bus bars 6a ₂ and 6b ₂ ,
Heat is transferred to the neutral wire 5a through the brazing material 9 to carbonize the insulating coating of the joint portion, the conductor 8 is removed to remove the carbonized insulating coating, and then a predetermined current is further conducted, whereby the brazing material The electric current passes through 9 and the brazing material 9 is heated to be brazed, and the neutral wire 5a and the bus bars 6a ₂ and 6b ₂ are joined in a so-called resistance brazing manner, that is, a plurality of The neutral wires 5a are connected to each other and electrically connected.

When performing the resistance brazing, the insulating coating on the part to be brazed may be removed in advance.

[0049] As described above, according to the method of connecting the motor leads according to the present invention, the bus bars 6a ₂ neutral line 5a,
6b ₂ can be arranged in parallel without bundling and can be made compact in the axial direction of the motor, but the neutral wire 5a and the bus bars 6a ₂ and 6b ₂ can be thermally welded. . Moreover, removing the conductor 8 of insulation of the joint portion after carbonized, it is possible to remove the carbonized insulating coating, neutral 5a and the bus bar 6a _2,
Furthermore it is possible to reliably perform the heat welding of the 6b _2.

When connecting the neutral wire 5a and the bus bar 6, it is not necessary to distinguish each phase. Therefore, the neutral wire 5a to be connected is arranged on the bus bar 6 separately for each phase from which it is extracted. May be evenly spaced.

Further, according to the present invention, as long as a plurality of lead wires of the motor are electrically connected to each other in such a manner that the lead wires are arranged in parallel one by one via the connection terminals, the lead wires are not necessarily of a three-phase motor neutral type. It need not be a wire, but may be another type of lead wire.

[Brief description of drawings]

FIG. 1 shows a stator winding of a conventional three-phase motor,
The front view which shows an example of the connection structure of a neutral wire, and the stator part of a motor.

FIG. 2 is a side view of the winding portion of FIG.

FIG. 3 is a front view showing an example of a stator of a three-phase motor to which the present invention is applied.

4 is a side view of the winding portion of FIG.

FIG. 5 is a side view showing an example of a connection mode of a winding portion of a neutral wire.

6A and 6B are diagrams showing a bus bar and a joint portion thereof according to the first embodiment, wherein FIG. 6A is a side view and FIG. 6B is a plan view.

FIG. 7 is a view showing a part of the joint portion of FIG. 6 changed, where (a) is a side view and (b) is a plan view.

8A and 8B are diagrams showing a bus bar and a joint portion thereof according to the second embodiment, FIG. 8A is a side view, and FIG. 8B is a plan view.

9A and 9B are views showing a modified part of the joint portion of FIG. 8, in which FIG. 9A is a side view and FIG. 9B is a plan view.

[Explanation of symbols]

5a Motor lead wire (neutral wire) 5c Tip part (joint part) 5d Boundary surface 6 Connection terminal (bus bar) 6 ₁ Connection terminal (bus bar) 6a ₂ (Plate-shaped) connection terminal (bus bar) 6b ₂ (Plate-shaped) ) Connection terminal (bus bar) 8 Conductor 9 Brazing material

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H02G 1/14 H02G 1/14 A H02K 15/04 H02K 15/04 E // B23K 101: 36 B23K 101: 36 (72) Inventor Tokio Shimomura 3-247 Higashi-ku, Nagoya, Aichi 3-247 3rd Akira Building 2nd floor Nastor Co., Ltd. Nagoya Branch F-term (reference) 5G353 BA02 CA05 EA01 5G355 AA03 BA02 BA08 CA15 CA17 5H604 AA05 AA08 BB01 BB08 BB14 CC01 CC05 CC11 QA08 QB14 5H615 AA01 BB01 BB05 BB14 PP01 PP14 PP15 SS04 SS09 SS15 SS46

Claims (7)

[Claims] 1. A method of connecting a plurality of motor lead wires, each of which has an insulating coating on the outer periphery thereof, for electrical connection by connecting the motor lead wires to each other, wherein a connecting terminal made of a conductive material is provided. The plurality of motor lead wires are arranged in parallel to a terminal, the motor lead wires arranged in parallel are sandwiched between the connection terminals, and a predetermined current is conducted to the connection terminals to heat the connection terminals. A method of connecting a motor lead wire, comprising: joining the connection terminal and the motor lead wire. 2. By heating the connection terminal,
The insulating coating on the joint between the connection terminal and the motor lead wire is removed, and a predetermined current is conducted to the connection terminal through the motor lead wire from which the insulation coating has been removed to connect the connection terminal and the motor lead wire. The method of connecting a motor lead wire according to claim 1, wherein the connecting terminal and the motor lead wire are joined together by heating the boundary surface of the motor lead wire. 3. The method of connecting a motor lead wire according to claim 1, wherein the connection terminal is formed in a U shape, and a tip portion of the motor lead wire is sandwiched between the U-shaped connection terminals. . 4. A conductor provided with the connection terminals in two separate plate-like shapes, the two plate-like connection terminals sandwiching a tip portion of the motor lead wire and electrically connecting the two connection terminals. Is detachably arranged, and a predetermined current is conducted to the connection terminal through the conductor to heat the connection terminal, thereby removing the insulating coating on the joint portion between the connection terminal and the motor lead wire. By removing the conductor, a predetermined current is conducted to the connection terminal through the motor lead wire from which the insulating coating has been removed to heat the boundary surface between the two connection terminals and the motor lead wire. The method of connecting a motor lead wire according to claim 1, wherein the two connection terminals are joined to the motor lead wire. 5. When the motor lead wire is clamped by the connection terminal, a brazing material is interposed at a joint portion between the connection terminal and the motor lead wire, and the connection terminal is heated to generate the brazing material. The method for connecting a motor lead wire according to claim 1, wherein the connection terminal and the motor lead wire are joined together by welding. 6. The connection terminal and the motor lead wire, which are connected by using the method for connecting a motor lead wire according to claim 1, are arranged so as to be connected in three in the parallel direction. And a method for manufacturing a three-phase motor. 7. A motor lead wire connection structure for connecting a plurality of motor lead wires, each having an insulating coating on an outer peripheral portion thereof, to each other for electrical conduction, wherein the motor lead wires are made of a conductive material. Is arranged in parallel, and is provided with a sandwichable connection terminal, the insulating coating is removed by causing a predetermined current to pass through the connection terminal to heat the connection terminal, and the connection terminal has the insulating coating. A predetermined current is conducted through the removed motor lead wire to heat the boundary surface between the connection terminal and the motor lead wire, thereby joining the connection terminal and the motor lead wire. Characteristic motor lead wire connection structure.