JP2022048418A - Connecting plate for rotary electric machine stator, rotary electric machine stator, and rotary electric machine - Google Patents

Abstract

To provide a rotary electric machine in which the outer diameter of a connection conductive wire that is shaped into a spiral shape can be reduced.SOLUTION: A connecting plate 17 for a rotary electric machine stator 10 includes a base 14a having a plurality of concentric grooves 14a1. The base 14a, to which a connection conductive wire 15 that is formed into a spiral shape is fixed, includes a cutout portion 14a2 to cut the connection conductive wire 15. The connection conductive wire 15 is cut in accordance with a target wire connection method. A conductive wire projection 15a is axially disposed at a connection point with a winding terminal portion 12b of the connection conductive wire 15. Conductive wire recesses 15b are disposed on the inner circumferential side and the outer circumferential side of the connection conductive wire 15 at the connection point.SELECTED DRAWING: Figure 10

Description

The present application relates to a connection plate of a rotary electric machine stator, a rotary electric machine stator, and a rotary electric machine.

There is a demand for a wiring structure that facilitates assembly of a rotary electric machine and improves productivity, and a stator structure that can reduce the size of the rotary electric machine.

In response to this demand, after molding the connecting conductor into a spiral shape and covering a part with an insulating member, a connection plate in which the connecting conductor is cut at a circumferential position is manufactured, and a through hole is provided in the connecting conductor. Disclosed is a method of inserting a winding end portion of a stator into a through hole and soldering it to a connecting lead wire to connect the wire (for example, Patent Document 1).

Japanese Patent No. 5348199

However, in the connection plate of Patent Document 1, since the connecting conductors molded in a spiral shape are arranged on the same plane, it is necessary to increase the coil in the radial direction, so that there is a problem that the diameter of the motor becomes large.

The present application discloses a technique for solving the above-mentioned problems, and is a connection plate of a rotary electric machine stator capable of reducing the outer diameter of a spirally formed connecting lead wire, and rotation using this connection plate. It is an object of the present invention to provide a stator of an electric machine and a rotary electric machine.

The connection plate of the rotary electric machine stator disclosed in the present application is provided with a pedestal having a plurality of concentric grooves, and the pedestal is provided with a notch for cutting the connection lead wire according to the connection method to be applied. A spirally formed connecting conductor is fixed to the notch, and a convex portion of the conducting wire is provided in the notch at the connection point with the winding terminal of the connecting conductor, and at least on the inner peripheral side and the outer peripheral side of the connection point. It is provided with a structure in which a conductor recess is provided in one of the connecting conductors.
The rotary electric machine stator disclosed in the present application includes the above-mentioned rotary electric machine stator connection plate and a plurality of winding assembly in which windings are wound around a laminated core equipped with an insulator. It is arranged in an annular shape and press-fitted into the frame, and the winding end portion of the winding assembly is connected to the connecting lead wire of the connection plate.
The rotary electric machine disclosed in the present application includes a stator of the rotary electric machine and a rotor arranged on the inner peripheral side of the stator.

According to the connection plate of the rotary electric machine stator disclosed in the present application, a connection plate capable of reducing the outer diameter of the connecting lead wire formed in a spiral shape can be obtained.
According to the stator of the rotary electric machine disclosed in the present application, a stator of the rotary electric machine provided with a connection plate capable of reducing the outer diameter of the connecting lead wire formed in a spiral shape can be obtained.
According to the rotary electric machine disclosed in the present application, a rotary electric machine using a stator provided with a connecting plate capable of reducing the outer diameter of a spirally formed connecting conductor can be obtained.

It is sectional drawing of the rotary electric machine according to Embodiment 1. FIG. It is a perspective view of the stator core of the rotary electric machine according to Embodiment 1. FIG. It is a structural drawing of the stator insulator of the rotary electric machine according to Embodiment 1. FIG. It is a structural drawing of the stator insulator of the rotary electric machine according to Embodiment 1. FIG. It is a structural drawing of the stator insulator of the rotary electric machine according to Embodiment 1. FIG. It is a perspective view of the winding assembly of a rotary electric machine according to Embodiment 1. FIG. FIG. 5 is a structural diagram of a pedestal for a connection plate of a rotary electric machine according to the first embodiment. FIG. 5 is a structural diagram of a pedestal for a connection plate of a rotary electric machine according to the first embodiment. FIG. 5 is a structural diagram of a pedestal for a connection plate of a rotary electric machine according to the first embodiment. FIG. 5 is a structural diagram of a pedestal for a connection plate of a rotary electric machine according to the first embodiment. It is explanatory drawing of the connection plate (before cutting of a connecting lead wire) of a rotary electric machine according to Embodiment 1. FIG. It is a wiring diagram of the rotary electric machine according to Embodiment 1. It is explanatory drawing of the connection plate (after cutting the connecting lead wire) of the rotary electric machine according to Embodiment 1. FIG. It is explanatory drawing of the connection of the connection lead wire bent in the axial direction of the connection plate of the rotary electric machine, and the winding terminal part by Embodiment 1. FIG. It is explanatory drawing of the stator assembly (wiring plate arrangement) of the rotary electric machine according to Embodiment 1. FIG. It is explanatory drawing of the electrode welding which concerns on the stator of the rotary electric machine by Embodiment 1. FIG. It is explanatory drawing of the stator assembly (mold) of the rotary electric machine according to Embodiment 1. FIG. It is a flowchart of manufacturing of the rotary electric machine according to Embodiment 1. It is a structural drawing of the pedestal for a connection plate of the modification of the rotary electric machine according to Embodiment 1. FIG. It is a structural drawing of the pedestal for a connection plate of the modification of the rotary electric machine according to Embodiment 1. FIG. It is a structural drawing of the pedestal for a connection plate of the modification of the rotary electric machine according to Embodiment 1. FIG. It is a structural drawing of the pedestal for a connection plate of the modification of the rotary electric machine according to Embodiment 1. FIG. It is a wiring diagram of the rotary electric machine according to Embodiment 2. It is explanatory drawing of the connection plate (before cutting of a connecting lead wire) of a rotary electric machine according to Embodiment 2. FIG. It is explanatory drawing of the connection plate of the rotary electric machine (after cutting the connecting lead wire) by Embodiment 2. FIG. It is explanatory drawing of the connection of the connection lead wire bent in the axial direction of the connection plate of the rotary electric machine, and the winding terminal part by Embodiment 2. FIG. It is explanatory drawing of the electrode welding which concerns on the stator of the rotary electric machine by Embodiment 2. FIG.

Embodiment 1.
In the first embodiment, a connecting lead wire formed in a spiral shape is fixed to a pedestal provided with a plurality of concentric grooves with an adhesive, and a notch portion for cutting the connecting lead wire is provided. The wall on the inner peripheral side of the part is provided with a space for the electrode to pass through, the connecting conductor is cut according to the connection method to be applied, and a convex portion of the conducting wire is provided at the connection point with the winding terminal part in the axial direction, and the connection point is provided. It relates to a connection plate of a rotary electric machine stator provided with conductor recesses on the inner peripheral side and the outer peripheral side of the above. Further, the first embodiment relates to a rotary electric machine stator provided with a connection plate for the rotary electric machine stator, and a rotary electric machine provided with the rotary electric machine stator.

Hereinafter, regarding the connection plate of the rotary electric machine stator, the stator of the rotary electric machine, and the rotary electric machine according to the first embodiment, FIG. 1 is a cross-sectional view of the rotary electric machine, FIG. 2 is a perspective view of the stator core, and a structural view of the stator insulator. 3A to 3C, FIG. 4 which is a perspective view of a winding assembly, FIGS. 5A to 5C which are structural views of a pedestal for a wiring plate, FIG. 6, and an explanatory view of a wiring plate (before cutting a connecting conductor). FIG. 7, FIG. 8, which is a connection diagram of a rotary electric machine, FIG. 9, which is an explanatory diagram of a connection plate (after cutting the connection conductor), connection between a connection lead wire bent in the axial direction of the connection plate and a winding terminal portion. FIG. 10, FIG. 11, which is an explanatory diagram of a stator assembly (connection plate arrangement) of a rotary electric machine, FIG. 12, which is an explanatory diagram of electrode welding related to a stator of a rotary electric machine, and an explanatory diagram of a stator assembly (mold). It will be described with reference to FIG. 13, FIG. 14 which is a flowchart of manufacturing a rotary electric machine, and FIGS. 15A to 15C and 16 which are structural diagrams of a pedestal for a connecting plate of a modified example.
In each figure, the same part or the corresponding part is indicated by the same reference numeral, and duplicated description will be omitted.

First, the overall structure of the rotary electric machine 100 according to the first embodiment will be described with reference to FIG. 1, which is a cut surface perpendicular to the axial direction of the rotary electric machine 100.
First, the components of the rotary electric machine 100 will be described, and then the functions and relationships of the components will be described.
The rotary electric machine 100 is composed of a stator 10, a rotor 30, a connection side bracket 50a, and a non-connection side bracket 50b.
The stator 10 includes a frame 60, a winding assembly 20, a power connector 40, and a lead wire 16.
The winding assembly 20 includes a laminated core 11, a connection-side insulator 13a, a non-connection-side insulator 13b, a winding lead wire 12a, a connection plate 17, and a connection lead wire 15.
In the following description, when the connection side insulator 13a and the anti-connection side insulator 13b are collectively described, they are described as the insulator 13. Further, the winding lead wire 12a is described as a lead wire 12a, and the connection lead wire 15 is appropriately described as a lead wire 15.

In the winding assembly 20, the conductor 12a is wound around the teeth portion 11b of the laminated core 11 via the insulator 13, and the winding 12 is formed. The winding assembly 20 is arranged in an annular shape and is press-fitted or shrink-fitted into the frame 60.
The stator 10 includes a frame 60, a winding assembly 20 arranged in an annular shape on the frame 60, and a connection plate 17 arranged on the connection side of the winding assembly 20.
The rotor 30 having a permanent magnet is arranged on the inner peripheral side of the stator 10, and its rotating shaft 31 is rotatably held by the connection side bracket 50a and the anti-connection side bracket 50b.
The stator 10 is provided with a lead wire 16 and a power connector 40 for connecting the winding terminal portion 12b of the winding assembly 20 to an external power source.
A conductor 15 for connecting the winding terminal portion 12b of the winding assembly 20 corresponding to the neutral point of the three-phase alternating current is arranged on the connection plate 17. Further, the connection plate 17 has a lead wire 15 for connecting the winding terminal portion 12b of the winding assembly 20 corresponding to the three-phase alternating current U, V, and W phases to the lead wire 16 connecting to the power connector 40. Have been placed.

In the following description, the rotation axis direction (horizontal direction in FIG. 1) is the axial direction (Z), the rotation axis center direction (vertical direction in FIG. 1) is the radial direction (R), and the rotation direction is along the rotation axis. The direction will be described by defining it as the circumferential direction (P).
The axial direction (Z) will be described with the side on which the connection plate 17 is installed as the + side and the opposite side as the − side.

The structure of the laminated core 11 will be described with reference to FIG. 2, which is a perspective view of the laminated core 11.
It is described in order to clarify the axial direction (Z), the radial direction (R), and the circumferential direction (P) described with reference to FIG.
The laminated core 11 is formed of a plurality of magnetic steel plates laminated in the axial direction.
A yoke portion 11a having a long shape in the circumferential direction (P) is formed on the outer peripheral side of the laminated core 11. On the inner peripheral side of the yoke portion 11a, a teeth portion 11b is formed so as to project toward the inner peripheral side from the position at the center of the yoke portion 11a in the circumferential direction.
At the end of the tooth portion 11b on the inner peripheral side, a protruding portion 11c having a shape extending on both sides in the circumferential direction (P) is formed.

The structure of the insulator 13 will be described with reference to FIGS. 3A to 3C.
Here, FIG. 3A is a perspective view of the connection side insulator 13a mounted on the connection plate side (+ side) end portion in the axial direction (Z) of the laminated core 11. FIG. 3B is a perspective view of the anti-connection side insulator 13b mounted on the anti-connection plate side (− side) end of the laminated core 11 in the axial direction (Z). FIG. 3C is a plan view of the connection side insulator 13a as viewed from above.
As is clear from the figure, the shape of the connection-side insulator 13a on the axial + side of the laminated core 11 and the anti-connection-side insulator 13b on the axial-side of the laminated core 11 are different.

First, the connection side insulator 13a mounted on the axial direction (Z) + side of the laminated core 11 will be described.
The connection side insulator 13a is composed of an outer flange portion 13a1, an inner flange portion 13a2, and a body portion 13c1. The outer flange portion 13a1 has the yoke portion 11a of the laminated core 11, the inner flange portion 13a2 has the protruding portion 11c of the laminated core 11, and the body portion 13c1 has the tooth portion 11b of the laminated core 11 from the axial (Z) + side. cover.

A conductor groove 13d is formed in the outer flange portion 13a1 of the wire connection side insulator 13a. The end of the conductor 12a forming the winding 12 is inserted into the conductor groove 13d so as to project from the inside of the outer flange portion 13a1 in the radial direction (R) to the outside.
An outer flange outer wall 13e is formed on the outer flange portion 13a1, and a conducting wire 12a protruding at the time of connection is routed along the outer flange outer wall 13e.
Further, a connection plate arrangement surface 13f for arranging the connection plate 17 is formed on the outer flange portion 13a1. The height of the inner flange portion 13a2 in the axial direction (Z) is the same as that of the connection plate arrangement surface 13f, and the connection plate 17 is arranged on the inner flange portion 13a2 and the connection plate arrangement surface 13f.

Next, the anti-connection side insulator 13b mounted on the axial direction (Z) − side of the laminated core 11 will be described.
The anti-connection side insulator 13b is composed of an outer flange portion 13b1, an inner flange portion 13b2, and a body portion 13c2. The outer flange portion 13b1 covers the yoke portion 11a, the inner flange portion 13b2 covers the protruding portion 11c of the laminated core 11, and the body portion 13c2 covers the teeth portion 11b of the laminated core 11 from the axial (Z) − side.

The structure of the winding assembly 20 will be described with reference to FIG. 4, which is a perspective view of the winding assembly 20.
The connection side insulator 13a is attached to the laminated core 11 from the axial direction (Z) + side, and the anti-connection side insulator 13b from the axial direction (Z) − side is attached. The winding 12 is wound around the laminated core 11 to which the insulator 13 is mounted to form the winding assembly 20.
The winding 12 is composed of a conducting wire 12a wound around the teeth portion 11b of the laminated core 11 via the insulator 13. Further, a sheet-shaped insulating member (not shown) is arranged between the laminated core 11 and the wound conductor 12a in order to secure insulation.

Further, in the winding assembly 20, the winding 12 is wound via another winding assembly 20 and the reverse connection side insulator 13b, and the winding assembly 20 is a set of two continuous windings.

The structure of the pedestal 14a for the connection plate 17 having a step in which the height of the bottom surface of the groove is higher in the groove on the inner peripheral side than in the groove on the outer peripheral side will be described with reference to FIGS. 5A to 5C and 6.
The pedestal 14b having the groove bottom surface on the same plane as the pedestal 14a having a step on the groove bottom surface will be described at the end of the first embodiment as a modification.
5A is a plan view of the pedestal 14a, FIG. 5B is a side view of the pedestal 14a, FIG. 5C is a sectional view seen from AA of FIG. 5A, and FIG. 6 is a perspective view of the pedestal 14a.

The pedestal 14a is made of an insulating member that has excellent rigidity for arranging the connecting conductor 15 and is an elastic body, for example, ABS (acrylonirile-butadiene-stylerene) resin.
The pedestal 14a is provided with a plurality of concentric grooves 14a1 in which the conducting wires 15 are arranged.

In order to create a connecting member for the U, V, W phases of three-phase alternating current and the neutral wire, a notch portion 14a2 is provided on the pedestal 14a as a space for cutting the conducting wire 15. In order to prevent the electrode 70a in contact with the conducting wire 15 from the axial direction (Z) + side during welding from interfering with the pedestal 14a, the inner wall recess 14a3 of the notch portion 14a2 has a structure recessed toward the inner peripheral side.
In order to pass the welding electrode 70b through the inner wall of the cutout portion 14a2, the inner wall on the (Z) -side in part is removed and a tunnel-shaped inner wall tunnel portion 14a4 is provided.
As will be described later, the electrode 70b to be inserted from the inner peripheral side of the stator 10 is arranged from the inner wall tunnel portion 14a4 to the axial direction (Z) − side of the connection plate 17, and the electrode 70a extends from the axial direction (Z) + side. Then, the lead wire 15 and the winding terminal portion 12b or the lead wire 16 are sandwiched and welded.

A winding start portion 14a5 is provided on the inner wall of the pedestal 14a, and when the conductor 15 is formed into a spiral shape, the lead wire 15 at the start of winding is hooked on the winding start portion 14a5 and then started to be wound.

Next, a procedure for arranging the connecting conductor 15 on the pedestal 14a to form the connecting plate 17 will be described.
The conductor 15 is formed into a spiral shape having three turns using a jig (not shown), the conductor 15 is arranged inside the groove 14a1 of the pedestal 14a, and the conductor 15 is fixed with the adhesive 19.
FIG. 7 is a plan view of the molded conductor 15 fixed to the pedestal 14a.

Next, a specific configuration method and procedure of the connection plate 17 when the rotary electric machine 100 is a three-phase AC 2Y connection will be described with reference to FIGS. 8 to 10.
In the first embodiment, as shown in FIG. 8, an example is described in which two windings of each phase are connected in parallel and applied to a rotary electric machine having a three-phase AC 2Y connection.
FIG. 9 is a diagram after cutting the conductor 15 with respect to the three-phase AC 2Y connection of FIG. Further, FIG. 9 also describes the connection between the winding terminal portion 12b of the winding assembly 20 and the conducting wire 15, and the connection between the lead wire 16 and the conducting wire 15 connected to the power connector 40.
In FIG. 9, the circle (A) indicates the connection between the winding terminal portion 12b of the winding assembly 20 and the conducting wire 15 required for the three-phase AC 2Y connection. Further, □ (B) indicates the connection between the lead wire 16 and the conductor wire 15 connected to the U, V, W phase power connector 40 of the three-phase alternating current.
Note that FIG. 9 also describes the neutral points of the U, V, and W phases of the three-phase alternating current, and the corresponding phase is described as, for example, (U).
FIG. 10 is an explanatory diagram of processing of the lead wire 15 at the connection point between the winding terminal portion 12b and the lead wire 16.

After fixing the conductor 15 to the pedestal 14a in order to form the connection member necessary for the configuration of the U, V, W phases of the three-phase alternating current and the neutral point, a punch die is inserted into the notch 14a2 of the pedestal 14a. The conductor 15 is punched from the axial (Z) + side with a punch and cut.
The conductor 15 on the innermost peripheral side of the conductor 15 having three turns is cut clockwise from the winding start portion 14a5 at positions of 15 °, 165 °, and 345 °. The second conductor 15 from the inner peripheral side is cut clockwise from the winding start portion 14a5 at a position of 45 ° and 285 °. The conductor 15 on the outermost peripheral side is cut at a position of 135 ° and 315 ° clockwise from the winding start portion 14a5.

Next, the molding process of the conductor 15 at the connection point between the winding terminal portion 12b and the lead wire 16 performed after the conductor 15 is cut will be described with reference to FIG.
FIG. 10 describes a case where the winding terminal portion 12b is connected (welded) to the conductor wire 15 on the second lap from the inner peripheral side.
After cutting the conductor 15, the welded portion of the conductor 15 is bent so as to protrude in the Z + direction to form the convex portion 15a of the conductor. Specifically, a jig with protrusions (not shown) pressurizes the welded portion of the conductor 15 from the axial (Z) + side and the axial (Z) − side to form the convex portion 15a of the conductor. ..
Further, the conductors 15 on the outer peripheral side and the inner peripheral side of the convex portion 15a are bent so as to project in the axial (Z) − direction to form the concave conductor 15b.

In FIG. 10, a case where the winding terminal portion 12b is welded to the conductor wire 15 on the second lap from the inner peripheral side has been described. When the winding terminal portion 12b is welded to the conductor 15 on the first lap from the inner peripheral side, the convex portion 15a of the conductor is formed on the conductor 15 on the first lap, and the concave portion 15b of the conductor is formed on the conductor 15 on the second lap. do it.
Further, when the winding terminal portion 12b is welded to the conductor wire 15 on the third lap from the inner peripheral side, the conductor convex portion 15a is formed on the conductor wire 15 on the third lap, and the conductor recess 15b is formed on the conductor wire 15 on the second lap. Should be formed.
Although FIG. 10 describes the case of welding the winding terminal portion 12b and the conducting wire 15, the same applies to the case of welding the lead wire 16 and the conducting wire 15.

The conductor 15 is arranged on the pedestal 14a as a wiring member necessary for the configuration of the U, V, W phases and the neutral point of the three-phase alternating current, fixed and applied, corresponding to the connection method of the stator 10, that is, the rotary electric machine 100. , Cut the lead wire 15. Further, a conductor convex portion 15a is formed in the conductor 15 at the connection point between the winding terminal portion 12b and the lead wire 16, and the conductor concave portion 15b is formed in the inner peripheral side and outer peripheral side conductors 15 of the conductor 15 forming the conductor convex portion 15a. By forming the above, the connecting plate 17 is manufactured.

Next, the method and procedure of arranging the connection plate 17 on the stator 10 and connecting the winding assembly 20 to the winding terminal portion 12b are described with reference to FIGS. 3A, 3C, 7, and 8. This will be described with reference to FIG. 11 which is an explanatory diagram of stator assembly (wiring plate arrangement) and FIG. 12 which is an explanatory diagram of electrode welding. Note that FIG. 11 is a perspective view in the middle of assembling the stator in which the connection plate 17 is arranged on the stator 10.
The arrangement of the connection plate 17 to the stator 10 and the connection between the conductor 15 and the winding terminal portion 12b of the winding assembly 20 are performed in a state where the plurality of winding assemblies 20 are fitted into the frame 60.

From the (Z) + side in the axial direction, the connection plate 17 is arranged on the inner flange portion 13a2 of the connection side insulator 13a of the stator 10 and the connection plate arrangement surface 13f.
The coating of the winding terminal portion 12b of the winding assembly 20 was peeled off, the winding terminal portion 12b was routed along the outer flange outer wall 13e of the wiring side insulator 13a, and the coating of the conductor 15 of the connection plate 17 was peeled off. Place it on the upper side. All the winding end portions 12b of each winding assembly 20 of the stator 10 are routed, arranged on the lead wire 15 of the connection plate 17, and then the lead wire 15 of each winding end portion 12b and the connection plate 17 are welded and connected.
This connection point corresponds to the circle (A) in FIG.

FIG. 12 is a diagram showing the positions of the electrodes 70a and 70b during welding. The electrode 70a for welding is arranged on the axial direction (Z) + side of the welded portion. An electrode 70b is arranged in the radial direction (R) from the inner peripheral side of the connection side insulator 13a of the stator 10, and the electrode 70a on the axial direction (Z) + side, the winding terminal portion 12b, and the lead wire 15 of the connection plate 17 are sandwiched and welded. do.
Here, the tip of the electrode 70b is bent into an L shape in order to avoid interference with the conducting wire 15.

Further, after peeling off the coating of the terminal of the lead wire 16 for supplying power to the U, V, and W phases of the three-phase alternating current, the coating of the lead wire 15 is arranged on the peeled portion.
Similar to the case of the winding terminal portion 12b of the winding assembly 20, the electrode 70a is arranged on the axial direction (Z) + side of the welded portion, and the electrode 70b is directed from the inner peripheral side of the stator 10 in the axial direction of the lead wire 15. Z) Arranged on the − side, the terminal of the lead wire 16 and the lead wire 15 of the connection plate 17 are sandwiched and welded to connect.
This connection point corresponds to the □ mark (B) in FIG.

Next, a molding process for insulating and fixing the connection portion of the stator 10 of FIG. 11 for which the connection by welding has been completed will be described with reference to FIG.
FIG. 13 is a diagram in which the winding assembly 20 of the stator 10 and the wiring plate 17 are molded.
The winding end portion 12b and the lead wire 16 of the winding assembly 20 are welded to the lead wire 15 of the connection plate 17, and after the connection, the winding assembly 20 of the stator 10 and the connection plate 17 are molded to form the welded portion. Insulate. Molding prevents the weld from breaking due to vibration.

The manufacturing procedure of the connection plate 17 of the first embodiment and the manufacturing procedure of the stator 10 described above will be described with reference to the flowchart of FIG.
The procedure for manufacturing the connection plate 17 and the stator 10 according to the first embodiment comprises the following steps 1 (S01) to 7 (S07).

In the conductor forming step of step 1 (S01), one conductor 15 is wound around a jig (not shown) and formed into a spiral shape.
In the lead wire fixing step of step 2 (S02), the lead wire 15 formed in a spiral shape is inserted into the groove 14a1 of the pedestal 14a coated with the adhesive 19 and fixed to the pedestal 14a.
In the lead wire cutting and forming step of step 3 (S03), the connecting lead wire fixed to the pedestal 14a is cut according to the connection method of the rotary electric machine 100, and the lead wire 15 at the connection point between the winding terminal portion 12b and the lead wire 16 is cut. The convex portion 15a of the conductor is formed in the conductor, and the concave portion 15b of the conductor is formed in the conductor 15 on the inner peripheral side and the outer peripheral side to manufacture the connection plate 17.
In the connection plate arrangement step of step 4 (S04), the connection plate 17 manufactured in step 3 (S03) is arranged on the stator 10. Specifically, the connection plate 17 is arranged on the inner flange portion 13a2 of the connection side insulator 13a of the winding assembly 20 and the connection plate arrangement surface 13f.
In the winding terminal routing step of step 5 (S05), the winding terminal 12b of the winding assembly 20 is arranged on the conductor 15. In FIG. 9, the winding terminal portion 12b of the winding assembly 20 and the state before the connection between the lead wire 16 and the lead wire 15 of the connection plate 17 correspond to each other.
In the winding terminal welding step of step 6 (S06), the electrodes 70a and 70b are inserted, and the winding terminal 12b of the winding assembly 20 and the lead wire 16 and the conducting wire 15 are welded.
In the molding step of step 7 (S07), after the winding terminal welding step of step 6 (S06) is completed, the winding assembly 20 of the stator 10 and the connection plate 17 are molded.

As described above, after the connection plate 17 is manufactured, the stator 10 can be manufactured by using the connection plate 17.
Further, by arranging the stator 10 using the connection plate manufactured in the first embodiment and the rotor 30 on the inner peripheral side of the stator 10, the rotor 30 is held and fixed by the connection side bracket 50a and the anti-connection side bracket 50b. , The rotary electric machine 100 can be manufactured.

Next, as a modification, a case where the pedestal 14b whose bottom surface of the groove is on the same plane is used will be described.

The structure of the pedestal 14b in which the heights of the bottom surfaces of the grooves for the connection plate 17 are on the same plane will be described with reference to FIGS. 15A to 15C and 16. In the description, the pedestal whose bottom surface of the groove is on the same plane is referred to as the pedestal 14b.
15A is a plan view of the pedestal 14b, FIG. 15B is a side view of the pedestal 14b, FIG. 15C is a sectional view seen from BB of FIG. 15A, and FIG. 16 is a perspective view of the pedestal 14b.

The pedestal 14b is provided with a plurality of concentric grooves 14b1 in which the conducting wires 15 are arranged.
In order to create a connection member for the U, V, W phases of three-phase alternating current and the neutral wire, a notch portion 14b2 is provided on the pedestal 14b as a space for cutting the conducting wire 15. In order to prevent the electrode 70a in contact with the conducting wire 15 from the axial direction (Z) + side at the time of welding from interfering with the pedestal 14b, the inner wall recess 14b3 of the notch portion 14b2 has a structure recessed toward the inner peripheral side.
In order to pass the welding electrode 70b through the inner wall of the cutout portion 14b2, the inner wall on the (Z) -side in part is removed and a tunnel-shaped inner wall tunnel portion 14b4 is provided.
The electrode 70b to be inserted from the inner peripheral side of the stator 10 is arranged from the inner wall tunnel portion 14b4 to the axial direction (Z) − side of the connection plate 17, and the electrode 70a extending from the axial direction (Z) + side, the lead wire 15, and the winding terminal. The portion 12b or the lead wire 16 is sandwiched and welded.

A winding start portion 14b5 is provided on the inner wall of the pedestal 14b, and when the conductor 15 is formed into a spiral shape, the lead wire 15 at the start of winding is hooked on the winding start portion 14b5 and then started to be wound.

The difference between the pedestal 14b and the pedestal 14a is whether the height of the bottom surface of the groove is on the same plane or higher on the inner peripheral side.
The pedestal 14a was used for manufacturing the connection plate 17 described in the flowcharts of FIGS. 9 to 13 and FIG. 14, arranging the connection plate 17 on the stator 10, welding the conductor 15 and the winding terminal portion 12b, and the lead wire 16 and molding. Same as the case.

Even in the connection plate 17 using the pedestal 14b, the lead wire convex portion 15a is formed on the lead wire 15 at the connection point between the winding terminal portion 12b and the lead wire 16, and the lead wire concave portion 15b is formed on the inner peripheral side and outer peripheral side lead wires 15. It is formed and welded to the lead wire 15 and the winding end portion 12b or the lead wire 16.
Therefore, it is possible to secure an insulation distance between the winding terminal portion 12b and the lead wire 16 and the conductor wires 15 on the inner peripheral side and the outer peripheral side of the connection point.

As a modification, a case where a pedestal 14b whose bottom surface of the groove is on the same plane is used has been described. Further, it is also possible to use a pedestal having a higher groove bottom surface on the outer peripheral side as opposed to a pedestal 14a having a higher groove bottom surface on the inner peripheral side.
However, in this case, the winding terminal portion 12b or the lead wire 16 is connected to the lead wire 15 from the axial (Z) − side.
Therefore, the conductor recess 15b is formed in the conductor 15 at the connection point between the winding terminal portion 12b and the lead wire 16, and the conductor convex portion 15a is formed in the conductor 15 on the inner peripheral side and the outer peripheral side of the conductor 15 in which the conductor recess 15b is formed. Mold.

As described above, in the connection plate of the rotary electric machine stator of the first embodiment, the connecting conductors formed in a spiral shape are fixed with an adhesive to a pedestal having a plurality of concentric grooves, and the connecting conductors are connected. A notch for cutting is provided, a space for passing an electrode is provided on the inner peripheral wall of the notch, and the connection lead wire is cut according to the connection method to be applied and connected to the winding terminal part. A conductor convex portion is provided at a point in the axial direction, and a conductor concave portion is provided on the inner peripheral side and the outer peripheral side of the connection point. Further, the rotary electric machine stator of the first embodiment is provided with the connection plate, and the rotary electric machine is provided with the rotary electric machine stator.
Therefore, in the first embodiment, a connection plate capable of reducing the outer diameter of the spirally formed connecting conductor can be obtained.
Further, when a pedestal in which the height of the bottom surface of the groove is higher on the inner peripheral side is used, the insulation distance between the winding terminal portion, the lead wire and the connecting lead wire can be secured more reliably. Further, a stator of a rotary electric machine provided with this connection plate and a rotary electric machine can be obtained.

Embodiment 2.
The second embodiment relates to a connection plate of a rotary electric machine stator applied to a rotary electric machine having a three-phase AC 1Y connection.

Regarding the connection plate of the rotary electric machine stator of the second embodiment, FIG. 17 which is a connection diagram of the rotary electric machine, FIG. 18 which is an explanatory diagram of the connection plate (before cutting the connection lead wire), and the connection plate (after cutting the connection lead wire). 19 which is an explanatory diagram of FIG. 19, FIG. 20 which is an explanatory diagram of the connection between the connection lead wire bent in the axial direction of the connection plate and the winding terminal portion, and FIG. 20 which is an explanatory diagram of electrode welding related to the stator of the rotary electric machine. Based on 21, the difference from the first embodiment will be mainly described.
In FIGS. 18 to 21 of the second embodiment, the same or corresponding parts as those of the first embodiment are designated by the same reference numerals.
The pedestal will be described using the pedestal 14a in which the height of the bottom surface of the groove is higher on the inner peripheral side.

The configuration method and procedure of the connection plate 17 when the rotary electric machine 100 is a three-phase AC 1Y connection will be described with reference to FIGS. 17 to 19.
In the second embodiment, as shown in FIG. 17, an example will be described in which two windings of each phase are connected in series and applied to a rotary electric machine having a three-phase AC 1Y connection.
FIG. 18 is a diagram before cutting the conductor 15 with respect to the three-phase AC 1Y connection of FIG.
FIG. 19 is a view after cutting the conductor 15. Further, FIG. 19 also describes the connection between the winding terminal portion 12b of the winding assembly 20 and the conducting wire 15, and the connection between the lead wire 16 and the conducting wire 15 connected to the power connector 40. In FIG. 19, the circle (A) indicates the connection between the winding terminal portion 12b of the winding assembly 20 and the conducting wire 15 required for the three-phase AC 1Y connection. Further, the □ mark (B) indicates the connection with the lead wire 16 connected to the U, V, W phase power connector 40 of the three-phase AC.
Note that FIG. 19 also describes the neutral points of the U, V, and W phases of the three-phase alternating current, and the corresponding phase is described as, for example, (U).

After fixing the conductor 15 to the pedestal 14a in order to form the connection member necessary for the configuration of the U, V, W phases of the three-phase alternating current and the neutral point, a punch die is inserted into the notch 14a2 of the pedestal 14a. The conductor 15 is punched from the axial (Z) + side with a punch and cut.
In the second embodiment, in the same manner as in the first embodiment, the molding is performed for three laps, and then another lap is molded to form a spiral of four laps.

The conductor 15 on the innermost peripheral side of the conductor 15 having four turns is cut clockwise from the winding start portion 14a5 at positions of 15 °, 135 °, 225 °, and 345 °. The second conductor 15 from the inner peripheral side is cut clockwise from the winding start portion 14a5 at a position of 15 ° and 255 °. The third conductor 15 from the inner peripheral side is cut clockwise from the winding start portion 14a5 at a position of 135 ° and 345 °. The conductor 15 on the outermost peripheral side is cut at a position of 15 ° clockwise from the winding start portion 14a5.

The conductor 15 is arranged on the pedestal 14a as a wiring member necessary for the configuration of the U, V, W phases and the neutral point of the three-phase alternating current, fixed and applied, that is, the connection method of the stator 10, that is, the rotary electric machine 100 (in this case, the connection method). 1Y connection), the conductor 15 is cut.

Next, the molding process of the conductor 15 at the connection point between the winding terminal portion 12b and the lead wire 16 performed after the conductor 15 is cut will be described with reference to FIG.
FIG. 20 describes a case where the winding terminal portion 12b is connected (welded) to the conductor wire 15 on the second lap from the inner peripheral side.
After cutting the conductor 15, the welded portion of the conductor 15 is bent so as to protrude in the Z + direction to form the convex portion 15a of the conductor. Specifically, a jig with protrusions (not shown) pressurizes the welded portion of the conductor 15 from the axial (Z) + side and the axial (Z) − side to form the convex portion 15a of the conductor. ..
Further, the conductors 15 on the outer peripheral side and the inner peripheral side of the convex portion 15a are bent so as to project in the axial (Z) − direction to form the concave conductor 15b.

FIG. 21 is a diagram showing the positions of the electrodes 70a and 70b during welding. The electrode 70a for welding is arranged on the axial direction (Z) + side of the welded portion. An electrode 70b is arranged in the radial direction (R) from the inner peripheral side of the connection side insulator 13a of the stator 10, and the electrode 70a on the axial direction (Z) + side, the winding terminal portion 12b, and the lead wire 15 of the connection plate 17 are sandwiched and welded. do.

As described above, the connection plate of the rotary electric machine stator of the second embodiment is configured to be applied to the rotary electric machine of the three-phase AC 1Y connection.
Therefore, as the connection plate of the rotary electric machine stator of the second embodiment, the connection plate can be applied to the rotary electric machine of the three-phase AC 1Y connection.

Although the present application describes various exemplary embodiments and examples, the various features, embodiments, and functions described in one or more embodiments are applications of a particular embodiment. It is not limited to the above, and can be applied to embodiments alone or in various combinations.
Therefore, innumerable variations not exemplified are envisioned within the scope of the techniques disclosed in the present application. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments. ..

10 stator, 11 laminated core, 11a yoke part, 11b teeth part,
11c protruding part, 12 windings, 12a winding lead wire, 12b winding end part,
13a Connection side insulator, 13a1 outer collar, 13a2 inner collar,
13c1 body, 13d conductor groove, 13e outer collar outer wall, 13f connection plate placement surface,
13b anti-connection side insulator, 13b1 outer flange, 13b2 inner flange,
13c2 body, 14a pedestal with a step on the bottom of the groove, 14a1 groove,
14a2 notch, 14a3 inner wall recess, 14a4 inner wall tunnel,
14a5 winding start, 14b pedestal with groove bottom on the same plane, 14b1 groove,
14b2 notch, 14b3 inner wall recess, 14b4 inner wall tunnel,
14b5 winding start part, 15 connection lead wire, 15a lead wire convex part, 15b lead wire concave part,
16 lead wire, 17 wire connection plate, 20 winding assembly, 30 rotor, 31 rotary shaft,
40 power connector, 50a connection side bracket, 50b non-connection side bracket,
60 frames, 70a electrode, 70b electrode, 100 rotary electric machine.

Claims (9)

The pedestal is provided with a pedestal having a plurality of concentric grooves, the pedestal is provided with a notch for cutting the connecting conductor according to the connection method to be applied, and the connecting conductor formed in a spiral shape on the pedestal is provided. It is fixed, and a convex portion of the conductor is provided in the notch portion at the connection point of the connection lead wire with the winding terminal portion in the axial direction, and the connection lead wire is provided on at least one of the inner peripheral side and the outer peripheral side of the connection point. A wire connection plate for a rotary electric machine stator having a structure with a lead wire recess. The connection plate has a structure in which the height of the bottom surface of the plurality of grooves is higher in the groove on the inner peripheral side and lower in the groove on the outer peripheral side, and the wall on the inner peripheral side of the notch portion. The wiring plate of the rotary electric machine stator according to claim 1, which is provided with a space for passing an electrode. The rotary electric machine according to claim 1, wherein the connection plate has a structure in which the heights of the bottom surfaces of the plurality of grooves are on the same plane, and a space for passing an electrode is provided in a wall on the inner peripheral side of the notch portion. Stator connection plate. The connection plate has a structure in which the height of the bottom surface of the plurality of grooves is higher in the groove on the outer peripheral side and lower in the groove on the inner peripheral side, and the wall on the inner peripheral side of the notch portion. The wiring plate of the rotary electric machine stator according to claim 1, which is provided with a space for passing an electrode. The connection plate for a rotary electric machine stator according to any one of claims 1 to 4, wherein the connecting conductor is fixed to the pedestal with an adhesive. The connection plate of the rotary electric machine stator according to any one of claims 1 to 5 is provided.
It is equipped with multiple winding assemblies in which windings are wound around a laminated core equipped with an insulator.
The winding assembly is annularly arranged and press-fitted into the frame.
A stator of a rotary electric machine having a structure in which the winding terminal portion of the winding assembly is connected to and connected to the lead wire convex portion of the connecting lead wire. The stator of a rotary electric machine according to claim 6, wherein the insulator of the winding assembly includes a flat surface for arranging and positioning the connection plate. The stator of a rotary electric machine according to claim 6 or 7, wherein the wiring plate and the winding assembly are molded. The stator of the rotary electric machine according to any one of claims 6 to 8,
A rotary electric machine including a rotor arranged on the inner peripheral side of the stator.

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