JP6710317B2 - Rotating electric machine and method of manufacturing rotating electric machine - Google Patents

Description

The present invention relates to a rotary electric machine and a method for manufacturing a rotary electric machine, and more particularly to a wire connection structure of a coil.

A drive unit of a conventional rotary electric machine is composed of an annular stator and a rotor rotatably held on the inner peripheral side of the stator. The stator is formed of a plurality of stator cores that are magnetic bodies, and insulators that are insulators are fitted to the stator cores. Then, the coil through which the current flows is wound around the stator core through the insulator.

When the rotating electric machine is an electric motor, the rotor is rotated by a magnetic field generated by passing an electric current through the coil. In the case of a generator, the rotor is rotated and an electric current is passed through a coil of the stator to generate electric power. A plurality of coils must be connected in series or in parallel in order for the rotating electric machine to be an electric motor to flow current in the coils, or for the rotating electric machine to be a generator to flow current in the coils. When connecting a plurality of coils, the larger the number of coils, the more complicated the coil terminal wire connection process such as winding start or winding end in manufacturing a rotating electric machine. The connection process of the coil terminal wire is basically performed by attaching a conductive member to the insulator and connecting the coil terminal wire to the conductive member by soldering or the like. However, as the number of coils increases as described above, the number of coil terminal wires connected to one conductive member increases.

In the prior art, an annular conductive member having a configuration in which a plurality of arms are provided at intervals in the circumferential direction in an annular body in which a band-shaped conductor is formed into an annular shape is arranged in each of a plurality of concentric circular grooves provided in an insulator, There is a method of connecting a coil terminal wire to each arm of a plurality of annular conductive members (see Patent Document 1).

JP, 2003-324883, A

In Patent Document 1, a plurality of annular grooves for arranging the annular conductive member must be formed in the insulator, and the shape of the insulator becomes complicated and large, and the manufacturing cost increases.

The present invention has been made to solve the above problems, and provides a rotating electric machine capable of connecting coil terminal wires and a method of manufacturing the rotating electric machine without complicating the structure of the insulator. With the goal.

The rotating electric machine according to the present invention includes an annular stator, and the stator includes a plurality of stator iron cores, a plurality of stator iron cores fitted to the plurality of stator iron cores, and a plurality of insulators formed of an insulating material. The stator core is provided with a plurality of coils wound through a plurality of insulators, and a plurality of conductive terminals attached to the plurality of insulators. Each of the plurality of conductive terminals has a conductive terminal attached thereto. A plurality of coil terminal wires drawn from one or a plurality of adjacent coils including coils wound around the insulator are joined, and a plurality of conductive terminals are connected for each phase by insulated wires, The insulated wire is wound from one of the two conductive terminals to the other through the gap between the coils, and both ends of the insulated wire are joined to each of the two conductive terminals . The terminal has a base material portion and an arm portion extending from the base material portion, and a plurality of terminals are provided between the base material portion and the arm portion in a state where the arm portion is bent so as to face the base material portion. The coil end wire is sandwiched, and the arm part is provided with a holding part for holding the insulated wire apart from the position where the plurality of coil end wires are sandwiched, and the insulated wire is wound around the holding part, Each of the coil terminal wire and the insulated wire is joined to the conductive terminal .

The method for manufacturing a rotating electrical machine according to the present invention is such that a plurality of insulators are fitted to a plurality of stator cores, and a conductive terminal is provided to the plurality of insulators in a state where a coil is wound around the stator cores via the insulators. Attaching, in each of the plurality of conductive terminals, a step of temporarily arranging a plurality of coil terminal wires drawn from one or a plurality of adjacent coils including the coil to which the conductive terminals are attached to the conductive terminals, and each phase Each of the two electrically conductive terminals connected to each other, the step of wrapping the insulated wire from one to the other through the gap between the coils, and the step of joining the plurality of coil terminal wires and the insulated wire to the electrically conductive terminals respectively. The conductive terminal has a base material portion and an arm portion extending from the base material portion, and the arm portion has a holding portion for holding one end portion of the insulated wire and a plurality of coil terminal wires are temporarily arranged. The insulated wire has a structure in which the outer peripheral surface of the conductor is covered with an insulator, the conductor is a stranded wire, and the insulated wire is provided at a position separated from the position where The conductor exposed by peeling off the insulator is wound around the holding part of one conductive terminal, and then the insulated wire is wound around the gap between the coils, and then the insulator is attached to the other end of the insulated wire. The insulator is peeled off after the peeling position is determined, and the conductor exposed by peeling is wound around the holding portion of the other conductive terminal .

According to the present invention, from one of the two conductive terminals attached to the insulator to the other, the insulated wire is laid through the gap between the coils, and the two ends of the insulated wire are connected to each other. It was configured to be bonded to each. Therefore, the insulator may be provided with a structure to which the conductive terminal is attached. Therefore, it is possible to connect the coil terminal wires without complicating the structure of the insulator.

It is sectional drawing which shows schematic structure of the rotary electric machine in embodiment of this invention. It is a schematic sectional drawing which shows the state which attached the propeller fan to the rotary electric machine of FIG. It is a principal part perspective view of the stator of the rotary electric machine of FIG. It is a perspective view showing a stator core in an embodiment of the invention. It is a figure which shows the insulator in embodiment of this invention. It is a figure which shows the wiring structure in embodiment of this invention. It is a schematic plan view of the stator of the rotary electric machine in the embodiment of the present invention. It is a figure which shows the external connection terminal of the rotary electric machine in embodiment of this invention. It is a figure which shows the auxiliary connection terminal of the rotary electric machine in embodiment of this invention. It is explanatory drawing of the jumper wire for connecting UA and UB of the rotary electric machine in embodiment of this invention. FIG. 3 is a schematic plan view showing a state in which UA and UB of the rotary electric machine according to the embodiment of the present invention are connected by jumper wires. It is a figure which shows the other example of crawl of the jumper wire of the rotary electric machine in embodiment of this invention. It is a figure which shows the state in which the 1st peeling part of each coil terminal wire and a jumper wire was provisionally arrange|positioned at the external connection terminal of the rotary electric machine in embodiment of this invention. It is explanatory drawing of the joining process of each coil terminal wire and jumper wire with respect to the external connection terminal of the rotary electric machine in embodiment of this invention.

Embodiments of the present invention will be described below with reference to the drawings. The present invention is not limited to the embodiments described below. Further, in each of the following drawings, the same or corresponding parts will be denoted by the same reference numerals, and the description thereof will be appropriately omitted or simplified.

FIG. 1 is a sectional view showing a schematic configuration of a rotary electric machine according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view showing a state in which a propeller fan is attached to the rotary electric machine of FIG.

The rotary electric machine 1 in the present embodiment is, for example, a brushless DC motor for driving the propeller fan 100 as shown in FIG. 2, and is installed in the outdoor unit of the air conditioner. As shown in FIG. 1, the rotating electric machine 1 has a cylindrical motor housing 4, an annular stator 2 incorporated in the motor housing 4, and an inner peripheral side of the stator 2 rotatably held. And a rotor 3.

The motor housing 4 is composed of a casing 5 in which the stator 2 is integrally molded with a thermosetting resin, and a bracket cover 8. The bracket cover 8 is composed of an insulating bracket 6 and a metal plate bracket 7 that cover the opening side of the casing 5.

The rotor 3 includes a disk-shaped rotor 9 and a plurality of permanent magnets 10 arranged on the outer peripheral side of the rotor 9 so as to face the inner periphery of the stator 2. Further, a shaft 11 penetrating in the axial direction of the rotating body 9 is press-fitted and fixed to the center of the rotating body 9. A pair of bearings 12 is attached to the shaft 11. One of the pair of bearings 12 is fixed to the bearing insertion portion 5a of the casing 5, and the other is fixed to the bearing insertion portion 6a of the insulating bracket 6. The bearing insertion portion 5a and the bearing insertion portion 6a are located on the central axis of the stator 2.

With the above configuration, the rotor 3 rotates on the same axis as the stator 2. Further, between the axial end surface of the rotor 3 and the insulating bracket 6, a printed circuit board 13 on which a Hall element or the like for detecting the magnetic pole position of the rotor 3 is mounted is arranged. The printed circuit board 13 is fixed to the printed circuit board holder 14 fixed to the motor housing 4 by welding or the like.

Next, the structure of the stator 2 will be described with reference to FIGS. 3 and 4.
FIG. 3 is a perspective view of a main part of the stator of the rotary electric machine of FIG. FIG. 4 is a perspective view showing a stator core according to the embodiment of the present invention.
The stator 2 is formed by combining a plurality of stator cores 15 made of a magnetic material, for example, 12 stator cores 15 in an annular shape. An insulator 16 made of an insulating material is attached to each of the plurality of stator cores 15 at both ends of the stator 2 in the axial direction. A coil 17 is wound around each of the plurality of stator cores 15 via an insulator 16. The structure of the insulator 16 will be described later.

As shown in FIG. 4, the stator core 15 includes a back yoke portion 151 located on the outer peripheral side of the stator 2, and a tooth portion 152 formed so as to project from the back yoke portion 151 in the axial direction of the stator 2. It consists of Further, the teeth portion 152 is provided so as to project from the central portion of the back yoke portion 151, the teeth base portion 152 a around which the coil 17 is wound via the insulator 16, and the teeth base portion 152 a are provided so as to face the back yoke portion 151. The tooth tip portion 152b serves as a partition of a space for housing the coil 17.

FIG. 5 is a diagram showing an insulator according to an embodiment of the present invention, (a) is a plan view, (b) is a front view, and (c) is a side view.
A pair of insulators 16 having different shapes are fitted to the upper and lower ends of the stator core 15, but only the upper insulator 16 related to the present invention will be described here.

As shown in FIG. 5, the insulator 16 includes a base plate portion 161 that comes into contact with the upper surface of the stator core 15 when fitted to the stator core 15, and an inner peripheral side of the stator 2 from the base plate portion 161 to the stator 2. Is formed by an inner peripheral protrusion 162 that is erected in the axial direction of the stator 2, an outer peripheral protrusion 163 that is erected in the axial direction of the stator 2 from the base plate 161 on the outer peripheral side of the stator 2, and a fitting piece portion 164. ing. The fitting piece portion 164 abuts on the outer peripheral side of the tooth tip portion 152b of the stator core 15, the inner peripheral side of the back yoke portion 151, and the side surface of the tooth base portion 152a. The outer peripheral projection 163 has a terminal engaging hole 163a for engaging an external connection terminal 18 (see FIG. 8 described later) and an auxiliary connection terminal 19 (see FIG. 9 described later) described later.

The insulator 16 having such a shape is fitted to the axially upper end portion of the stator core 15, and the insulator 16 having a different shape from the upper end side is fitted to the axial lower end portion of the stator core 15. An external connection terminal 18 and an auxiliary connection terminal 19, which will be described later, are attached to the insulator 16 on the upper end portion side, and are not attached to the insulator 16 on the lower end portion side. Then, the coil 17 is wound around the substrate portion 161 of the insulator 16. Then, as shown in FIG. 3, the coil 17 is housed between the inner peripheral protruding portion 162 and the outer peripheral protruding portion 163 of the stator core 15, and the stator core 15 and the coil 17 are insulated by the insulator 16. It will be composed.

Next, connection points in the embodiment of the present invention will be described with reference to FIG.
FIG. 6 is a diagram showing a wire connection structure according to the embodiment of the present invention.
The connection structure shown in FIG. 6 is a connection method called a three-phase delta connection. Indicated by U1, U2, U3, U4, W1, W2, W3, W4, V1, V2, V3, V4 in FIG. 6 are independent coils. Then, two-series and two-parallel coils form one-phase coils, and these are delta-connected.

Here, in the present embodiment, two teeth are continuously wound by winding the winding continuously on two adjacent tooth portions 152. In other words, U1 and U2, U3 and U4, W1 and W2, W3 and W4, V1 and V2, V3 and V4, which are connected in series, are wound by continuous winding of 2 teeth and are originally conductive, No connection processing is required between the two. Therefore, in this connection method, the connection processing is required to be roughly divided into three parts as is clear from the connection diagram of FIG.

That is, the coil terminal wires of the U1, U3, V2, and V4 coils 17 are connected to the U-phase external power supply, and the coil terminal wires of the W1, W3, U2, and U4 coils 17 are connected to the W-phase external power supply. And the coil terminal wire of each coil 17 of V1, V3, W2, and W4 is connected to the V-phase external power supply. Then, by connecting the connection location to the external power supply for each phase, power is supplied to the coil 17 and the motor rotates.

FIG. 7 is a schematic plan view of the stator of the rotary electric machine according to the embodiment of the present invention. FIG. 7 shows the positional relationship between the coils 17.
Here, the two coils 17 wound by continuous winding of two teeth are arranged adjacent to each other as is apparent from FIG. 7. Further, according to FIG. 7, U1 and V4 connected to the U-phase external power supply are adjacent to each other, and U3 and V2 are also adjacent to each other. Further, V1 and W2, which are connected to the V-phase external power source, are adjacent to each other, and V3 and W4 are adjacent to each other. W1 and U2, which are connected to the W-phase external power supply, are adjacent to each other, and W3 and U4 are adjacent to each other. Here, the coil terminal wires 17a of U1 and V4 are collectively referred to as UA. Similarly, U3 and V2 are referred to as UB, V1 and W2 are referred to as VA, V3 and W4 are referred to as VB, W1 and U2 are referred to as WA, and W3 and U4 are referred to as WB.

When the coils are arranged as described above, UA and UB, WA and WB, and VA and VB, which need to be connected to each other, are present on the concentric circles in diagonal directions. In order to connect the coil terminal wires 17a that are diagonally connected to each other, in the present embodiment, the connection is performed using the external connection terminal, the auxiliary connection terminal, and the electric wire covered with the insulator. Before describing the details of this connection method, the external connection terminal and the auxiliary connection terminal will be described below.

8A and 8B are diagrams showing external connection terminals of the rotary electric machine according to the embodiment of the present invention, FIG. 8A is a plan view, FIG. 8B is a front view, and FIG. 8C is a side view.
The external connection terminal 18 is composed of a conductive member, and as shown in FIG. 8, has a plate-shaped base material portion 18a and a plate-shaped arm portion 18c which is a portion to be actually connected. .. In the base material portion 18a, one end portion in the longitudinal direction (vertical direction in FIG. 8B) serves as an insertion portion 18b that is inserted into the terminal engagement hole 163a of the insulator 16, and the other end portion serves as an external power supply connection portion. It is 18e.

The arm portion 18c is formed so as to extend from the central portion of the base material portion 18a in the longitudinal direction so as to be inclined with respect to the base material portion 18a at an angle of, for example, about 45°. Each coil terminal wire 17a is joined to the arm portion 18c by a joining method such as soldering. Further, a holding portion 18d that holds a jumper wire, which will be described later, is formed at the tip of the arm portion 18c. The holding portion 18d is formed by cutting out both end portions of the arm portion 18c in the direction orthogonal to the extending direction at the tip portion of the arm portion 18c.

9A and 9B are views showing auxiliary connection terminals of the rotating electric machine according to the embodiment of the present invention, FIG. 9A is a plan view, FIG. 9B is a front view, and FIG. 9C is a side view.
As shown in FIG. 9, the auxiliary connection terminal 19 includes a plate-shaped base material portion 19a and a plate-shaped arm portion 19c which is a portion where the wire connection process is actually performed. One end of the base material portion 19a in the longitudinal direction (vertical direction in FIG. 9B) is an insertion portion 19b that is inserted into the terminal engagement hole 163a of the insulator 16. Further, the arm portion 19c is formed by extending from the central portion of the base material portion 19a in the longitudinal direction so as to be inclined with respect to the base material portion 19a in an angle direction of, for example, about 45°. Each coil terminal wire 17a is joined to the arm portion 19c by a joining method such as soldering. Further, a holding portion 19d for holding a jumper wire, which will be described later, is formed at the tip of the arm portion 19c. The holding portion 19d is formed by cutting out both end portions in the direction orthogonal to the extending direction at the tip end portion of the arm portion 19c.

The difference between the external connection terminal 18 and the auxiliary connection terminal 19 is the presence/absence of the external power supply connection portion 18e, as is clear by comparing FIGS. 8 and 9. It should be noted that the auxiliary connection terminal 19 may have the same shape as the external connection terminal 18, but in the embodiment of the present invention, the stator 2 is resin-molded as described above, and the parts other than the external power supply connection part 18e are provided. The resin is filled. Therefore, it is possible to reduce the amount of resin by using the auxiliary connection terminal 19 that does not include the external power supply connection portion 18e except for the portion connected to the external power supply. The external connection terminal 18 and the auxiliary connection terminal 19 correspond to the conductive terminal of the present invention.

Next, the connection method of this embodiment will be described.
First, the insertion portion 18b of each external connection terminal 18 is inserted into the terminal engagement hole 163a of each insulator 16 of U1, W1, and V1, and the external connection terminal 18 is attached to each of U1, W1, and V1. Further, the insertion portion 19b of each auxiliary connection terminal 19 is inserted into the terminal engagement hole 163a of each insulator 16 of U3, W3, and V3, and the auxiliary connection terminal 19 is attached to each of U3, W3, and V3. The external connection terminal 18 and the auxiliary connection terminal 19 are attached to the insulator 16 in a direction in which the arm portion 18c and the arm portion 19c are located outside in the radial direction.

Then, the coil terminal wires of UA, UB, WA, WB, VA, and VB are provisionally arranged in each of the external connection terminal 18 and the auxiliary connection terminal 19. That is, the UA is provisionally placed on the external connection terminal 18 attached to U1, the WA is provisionally placed on the external connection terminal 18 attached to W1, and the VA is provisionally placed on the external connection terminal 18 attached to V1. Here, "temporary placement" means "positioning" rather than "joining" by soldering or the like. Further speaking, "temporary arrangement of UA" means that the coil terminal wire 17a of U1 and the coil terminal wire 17a of V4 that constitute the UA are put together to form the base material of the external connection terminal 18 as shown in FIG. 13 described later. This corresponds to the arrangement at the corner 18f (see FIG. 8A) between the portion 18a and the arm 18c. FIG. 13 will be described again.

Next, UB is provisionally placed on the auxiliary connection terminal 19 attached to U3, WB is provisionally placed on the auxiliary connection terminal 19 attached to W3, and VB is provisionally placed on the auxiliary connection terminal 19 attached to V3. Then, a jumper wire for connecting UA and UB, a jumper wire for connecting WA and WB, and a jumper wire for connecting VA and VB are provisionally arranged.

Next, the temporary arrangement of jumper wires for connecting UA and UB will be described as a representative.
FIG. 10 is an explanatory diagram of jumper wires for connecting UA and UB of the rotary electric machine according to the embodiment of the present invention. FIG. 11 is a schematic plan view of a state in which UA and UB of the rotary electric machine according to the embodiment of the present invention are connected by jumper wires.
The jumper wire 20 is composed of an insulated wire in which the outer peripheral surface of the conductor is covered with an insulator. The insulated wire has a structure in which the insulator has a thickness of about 0.8 mm to 2.8 mm, such as vinyl. In FIG. 10A, the jumper wire 20 is cut in advance and is referred to as a cut jumper wire 20a. The cut jumper wire 20a is cut long with a margin so as not to be short when connecting. Then, as shown in FIG. 10B, the insulator at one end of the cut jumper wire 20a is peeled off to expose the conductor, and the first peeled portion 201 is formed. The cut jumper wire 20a in this state is called a one-side peeling jumper wire 20b.

Subsequently, the first peeling portion 201 of the one-side peeling jumper wire 20b is provisionally placed on the external connection terminal 18. In this temporary arrangement, the first peeling portion 201 of the one-side peeling jumper wire 20b is wound around the holding portion 18d of the external connection terminal 18 as shown in FIG. As a result, with one end of the one-side peeling jumper wire 20b fixed, the one-side peeling jumper wire 20b is guided to U3 while passing through the gap between the coils as shown in FIG.

That is, first, one side peeling jumper wire 20b is passed through the gap in the longitudinal direction of the gap, here, from the upper part to the lower part of the gap, into the gap with the coil of V4 on the right side of U1 when U1 is viewed from the outer peripheral side. Crawl the bottom of the coil. Then, the one-side peeling jumper wire 20b at the lower part of the coil of V4 is passed from the lower part to the upper part in the gap between the coils of V4 and V3, and is wound around the upper part of the coil of V3. Repeat this until you reach U3. Since the outer circumference of the jumper wire 20 is made of an insulating material, the jumper wire 20 is naturally insulated from the coil even when it is wound around the upper part of the coil, the gap between the coils, and the lower part of the coil.

After reaching U3, the insulating portion 202 of the one-side peeling jumper wire 20b is brought into contact with the auxiliary connection terminal 19 attached to U3, and the other end of the one-side peeling jumper wire 20b to be joined to the auxiliary connection terminal 19 is reached. The peeling point of the insulating portion 202 of the portion is determined. Then, a peeling process is performed on the insulating portion 202 at the determined peeling portion, and the second peeling portion 203 is created as illustrated in FIG. Then, the second peeling portion 203 is wound around the holding portion 19d of the auxiliary connection terminal 19. The above-mentioned provisional arrangement by crawling the jumper wire 20 is similarly performed between WA and WB and between VA and VB.

As described above, the attachment of the external connection terminal 18 and the auxiliary connection terminal 19 to the insulator 16, the temporary disposition of each coil terminal wire 17a for each of the external connection terminal 18 and the auxiliary connection end, and the wrapping of the jumper wire 20 are completed.

After that, the external connection terminal 18 and the auxiliary connection terminal 19 are connected by a jumper wire 20 for each phase. That is, the first peeling portion 201 and the second peeling portion 203 on both ends of the jumper wire 20 are joined to the external connection terminal 18 attached to U1 and the auxiliary connection terminal 19 attached to U3 by, for example, soldering. To process. This completes the U-phase wiring. The above connection processing is similarly performed for the W phase and the V phase to complete the joining of the U phase, the W phase, and the V phase, and the connection processing is completed. Then, the motor can be rotated by connecting an external power supply to the external connection terminals 18 attached to U1, W1, and V1, respectively. Note that, here, after the respective members are provisionally arranged, the respective portions are joined together at the end, but at which stage the joining of the respective portions is performed is arbitrary.

It should be noted that the jumper wire 20 does not have to be routed from the right side of U1, and there is no problem if it is routed from the left side. Further, although the jumper wire 20 is placed in U1 and then the jumper wire 20 is laid, but it may be placed in U3 and then laid. Further, this time, the jumper wire 20 was passed through all the gaps between the coils on the right side as viewed from the U1 outer peripheral side, but it is not necessary to pass the jumper wire 20 through all the coil gaps, and the coil upper surface is held to hold the jumper wire 20. It is enough to crawl on the lower surface of the coil at least once. For example, the following FIG. 12 may be used.

FIG. 12 is a diagram showing another example of wrapping jumper wires of the rotating electric machine according to the embodiment of the present invention.
As shown in FIG. 12, a jumper wire 20 is passed from the upper part to the lower part in the gap between the coils of U1 and V4, and the lower part of V4 and the lower part of V3 are routed to the lower part of the gap between the coils of V3 and W4. Through the upper part of W4 and the upper part of W3 and the upper part of W3, and the gap between the coils of W3 and U4 is passed from the upper part to the lower part, and the lower part of the coil of U4, and the gap between the coils of U4 and U3 You can pass through from the bottom to the top and let U3 gather. In addition, this pattern is a pattern in which the jumper wire 20 is wound twice under the coil 17 and once over the coil 17.

By the way, since the jumper wire 20 is routed from the external connection terminal 18 to the auxiliary connection terminal 19 as described above, it is preferable to use a twisted wire which has higher flexibility and is easier to bend than a single wire having low flexibility. .. Further, in the case where the jumper wire 20 is a twisted wire, soldering is generally the most reliable than the joining by crimping or the like. However, when the jumper wire 20 is used as a twisted wire to be joined by soldering, the twisted wire easily absorbs the solder, which may cause the following problems. That is, when it is attempted to solder the coil terminal wire 17a together with the jumper wire 20 to the external connection terminal 18, the solder is absorbed only by the twisted wire, and the solder is unlikely to adhere to the coil terminal wire 17a.

Based on the above points, in the present embodiment, the jumper wire 20 and each coil terminal wire 17a are joined to the external connection terminal 18 as follows.

FIG. 13 is a diagram showing a state in which the coil terminal wires and the first peeling portions of the jumper wires are provisionally arranged on the external connection terminals of the rotary electric machine according to the embodiment of the present invention. FIG. 14: is explanatory drawing of the joining process of each coil terminal wire and jumper wire with respect to the external connection terminal of the rotary electric machine in embodiment of this invention. Here, an example in which the UA and the jumper wire 20 are joined to the external connection terminal 18 will be described.
In the state in which the temporary arrangement of the coil terminal wires 17a and the jumper wires 20 is completed, as shown in FIG. 13, each coil terminal wire 17a has a corner portion 18f between the base portion 18a of the external connection terminal 18 and the arm portion 18c ( 3 (see FIG. 3A). Further, the jumper wire 20 is in a state in which the first peeling portion 201 is wound around the holding portion 18d of the external connection terminal 18.

When the coil terminal wire 17a and the jumper wire 20 are joined to the external connection terminal 18, the arm portion 18c is bent so as to face the base material portion 18a, as shown in FIG. As a result, each coil terminal wire 17a is sandwiched between the arm portion 18c and the base material portion 18a. Then, the coil terminal wires 17a and the jumper wires 20 are sequentially soldered to the external connection terminals 18. Then, an unnecessary portion of each coil terminal wire 17a is cut off.

Here, the jumper wire 20 is wound around the holding portion 18d provided on the distal end side of the arm portion 18c, and is located at a position apart from each coil terminal wire 17a located on the base side of the arm portion 18c. Therefore, when soldering the coil terminal wires 17a, it is possible to prevent the solder from being absorbed by the jumper wires 20, and it is possible to perform good soldering of the coil terminal wires 17a.

When the stator 2 is used as the casing 5, the stator 2 configured through the above steps may be integrated by resin molding.

When the jumper wire 20 is composed of a single wire, the first peeled portion 201 of the jumper wire 20 may be collectively sandwiched by the corner portions 18f between the base material portion 18a and the arm portions 18c and joined by soldering. .. When the jumper wire 20 is composed of a single wire, the coil terminal wire 17a and the jumper wire 20 may be joined to the external connection terminal 18 by using the method described with reference to FIGS. 13 and 14.

In the connection structure in the present embodiment described above, the four coil terminal wires 17a to be connected are the first set in which the coils are adjacent to each other and the second set in which the coils are adjacent to each other at a position apart from the first set. It is divided into In the example of the U phase, the first set corresponds to UA and the second set corresponds to UB. Then, the external connection terminal 18 is attached to the insulator 16 around which the coil of one coil terminal wire 17a of the two coil terminal wires 17a of the first group is wound, and the external connection terminal 18 of the two coil terminal wires 17a of the second group is attached. The auxiliary connection terminal 19 is attached to the insulator 16 around which one of the coil terminal wires 17a is wound.

Then, the two coil terminal wires 17 a of the first set are collectively joined to the external connection terminal 18, and the two coil terminals of the second set are collectively joined to the auxiliary connection terminal 19. Since the external connection terminal 18 and the auxiliary connection terminal 19 are installed at positions distant from each other, the external connection terminal 18 and the auxiliary connection terminal 19 are jumper wires that wrap around the coil upper portion, the gap between the coils, and the coil lower portion. It is a very simple connection structure that is joined at 20.

Therefore, in this connection structure, the insulator 16 only needs the terminal engagement hole 163a for mounting the external connection terminal 18 or the auxiliary connection terminal 19. Therefore, the insulator 16 can be made into a very simple shape, and the cost can be reduced. This point will be supplemented below.

The conventional connection structure requires an insulating structure of a conductive member for connecting the coil terminal wires and a fixing structure for fixing the conductive member. That is, in Patent Document 1, the annular conductive member corresponds to the conductive member, and the insulator is provided with a plurality of annular grooves that double as an insulating structure of the conductive member and a fixing structure of the conductive member. On the other hand, in the present embodiment, by using the jumper wire 20 in which the conductor is covered with the insulator as the conductive member for connecting the coil terminal wires, a separate insulating structure is not required. It can insulate itself.

Further, the position of the jumper wire 20 itself can be fixed by winding the jumper wire 20 around the gap between the coils or the like. Specifically, the operation of passing the jumper wire 20 through the gap between the coils in the longitudinal direction of the gap and the operation of crawling the end portion of the coil in the longitudinal direction in the direction orthogonal to the longitudinal direction are alternately repeated. By doing so, the position of the jumper wire 20 itself can be fixed. In this way, the jumper wire 20 is laid in the gap between the coils or the like, so that the insulator does not need a fixing structure for fixing the position of the jumper wire 20 as a conductive member. Therefore, it suffices that the insulator is simply provided with a simple structure for attaching the external connection terminal 18 and the auxiliary connection terminal, specifically, the terminal engaging hole 163a, and a complicated structure such as an insulating structure and a fixing structure of the conductive member. No structure required.

Further, in the structure of Patent Document 1, the lengths of the respective arm portions of the plurality of annular conductive members are different, and it is necessary to assemble them into the plurality of annular grooves in a predetermined order. Therefore, in Patent Document 1, assembly of the rotating electric machine is complicated. However, in the present embodiment, there are few restrictions on such an assembling order, and therefore work is not made difficult.

Further, in the present embodiment, even if the number of coils is increased or decreased, it is not necessary to change the structure of the insulator 16 or the structure of the external connection terminal 18 and the auxiliary connection terminal 19, and these can be used for general purposes. Also from this aspect, it is effective for cost reduction.

Further, in the rotary electric machine 1 of the present embodiment, the stator portion is molded after the above wiring is completed. Here, the jumper wire 20 has a portion located in the gap between the coils and extending in the longitudinal direction of the gap, and a portion laid along the end portion of the coil in the longitudinal direction and extending in a direction orthogonal to the longitudinal direction. That is, the state is repeated, that is, it is fixed by being crawled through the gap between the coils. Therefore, in molding, it is possible to avoid the disadvantage that the molding pressure floats up. In addition, the jumper wire 20 is laid loosely and no gap is formed between the jumper wire 20 and the coil 17, so that when the thermosetting resin is poured, the flow of the thermosetting resin is deteriorated in the gap. It is possible to suppress the disadvantage that a void is generated between the jumper wire 20 and the coil 17.

In the present embodiment, the structure in which the stator 2 is molded has been described as an example, but a structure in which the stator 2 is not molded may be used.

Further, as the jumper wire 20, a single wire or a twisted wire may be used, but the twisted wire is preferable because it is soft and it is easy to crawl between the coils.

Further, in the present embodiment, two teeth are continuously wound, but a winding may be wound for each tooth. In addition, for example, when one phase coil is formed by three series, three teeth may be continuously wound.

DESCRIPTION OF SYMBOLS 1 rotary electric machine, 2 stators, 3 rotors, 4 motor housings, 5 casings, 5a bearing insertion parts, 6 insulating brackets, 6a bearing insertion parts, 7 sheet metal brackets, 8 bracket covers, 9 rotating bodies, 10 permanent magnets, 11 Shaft, 12 bearing, 13 printed circuit board, 14 printed circuit board retainer, 15 stator core, 16 insulator, 17 coil, 17a coil terminal wire, 18 external connection terminal, 18a base material part, 18b insertion part, 18c arm part, 18d Holding part, 18e External power supply connection part, 18f Corner part, 19 Auxiliary connection terminal, 19a Base material part, 19b Insertion part, 19c Arm part, 19d Holding part, 20 Jumper wire, 20a cut jumper wire, 20b One side peeling jumper wire, 100 propeller fan, 151 back yoke part, 152 teeth part, 152a teeth base part, 152b teeth tip part, 161 board part, 162 inner peripheral protrusion part, 163 outer peripheral protrusion part, 163a terminal engaging hole, 164 fitting piece part, 201 First peeling portion, 202 Insulating portion, 203 Second peeling portion.

Claims (10)

Equipped with an annular stator,
The stator is
Multiple stator cores,
A plurality of insulators, which are fitted to the plurality of stator cores and are made of an insulating material,
A plurality of coils wound around the plurality of stator cores via the plurality of insulators,
A plurality of conductive terminals attached to the plurality of insulators,
A plurality of coil terminal wires drawn from one or a plurality of adjacent coils including the coil wound around the insulator to which the conductive terminal is attached are joined to each of the plurality of conductive terminals. , The plurality of conductive terminals are connected by an insulated wire for each phase,
The insulated electric wire is joined to each of the two conductive terminals from both ends of the insulated electric wire in a state where the insulated electric wire is laid from one of the two conductive terminals to the other through the gap between the coils. and,
The conductive terminal has a base portion and an arm portion extended from the base portion,
The plurality of coil terminal wires are sandwiched between the base material portion and the arm portion in a state where the arm portion is bent so as to face the base material portion,
Further, the arm portion is provided with a holding portion that holds the insulated electric wire apart from a position where the plurality of coil end wires are sandwiched, and the plurality of coils are provided with the insulated electric wire wound around the holding portion. A rotating electric machine in which each of the terminal wire and the insulated electric wire is joined to the conductive terminal . The insulated wire includes a portion located in the gap between the coils and extending in the longitudinal direction of the gap, and a portion laid along the longitudinal end of the coil and extending in a direction orthogonal to the longitudinal direction. The rotating electric machine according to claim 1, wherein the rotating electric machine is in a state of being alternately repeated. An engagement hole is formed in one of the insulator and the conductive terminal, and an insertion portion is formed in the other, and the insertion portion is inserted into the engagement hole to attach the insulator and the conductive terminal. The rotating electric machine according to claim 1 or 2. The rotating electric machine according to any one of claims 1 to 3, wherein the insulated wire has a structure in which an outer peripheral surface of a conductor is covered with an insulator, and the conductor is a stranded wire. The rotating electric machine according to claim 4, wherein the insulated wire and the coil terminal wire are soldered to the conductive terminal . The rotating electric machine according to claim 1, wherein the stator is integrated with resin. A plurality of insulators are fitted to a plurality of stator cores, conductive terminals are attached to the plurality of insulators in a state in which a coil is wound around the stator cores via the insulators, and the plurality of conductive terminals are attached. In each of the above, a step of temporarily arranging a plurality of coil terminal wires drawn from one or a plurality of adjacent coils including the coil to which the conductive terminal is attached to the conductive terminal,
Crawling an insulated wire from one of the two conductive terminals connected for each phase to the other through the gap between the coils,
A step of joining each of the plurality of coil terminal wires and the insulated wire to the conductive terminal ,
The conductive terminal includes a base material portion and an arm portion extending from the base material portion, and the arm portion includes a holding portion that holds one end portion of the insulated wire, the plurality of coil terminal wires. Prepare for the position away from the position where
The insulated wire has a structure in which the outer peripheral surface of the conductor is covered with an insulator, the conductor is a stranded wire,
In the step of crawling the insulated wire, the conductor exposed by peeling off the insulator at the one end of the insulated wire is wound around the holding portion of one of the conductive terminals, and then the insulated wire is After crawling through the gap between the coils, the insulator is peeled off after the position of peeling the insulator is determined at the other end of the insulated wire, and the conductor exposed by peeling is separated from the other. 7. A method of manufacturing a rotating electric machine wound around the holding portion of the conductive terminal . The step of crawling the insulated wire includes a step of passing the insulated wire in the gap between the coils in the longitudinal direction of the gap, and a step of crawling the end of the coil in the longitudinal direction in a direction orthogonal to the longitudinal direction. The method for manufacturing a rotating electric machine according to claim 7, further comprising a step of alternately repeating and. The step of temporarily disposing the plurality of coil terminal wires on the conductive terminal is a step of disposing the plurality of coil terminal wires at the corners of the base material portion and the arm portion,
In the step of joining each of the plurality of coil terminal wires and the insulated electric wire to the conductive terminal, the arm portions are bent to face the base material portion and the plurality of coil terminal wires are connected to the base material portion. a state sandwiched between said arms, in this state, both when soldering the plurality of coil end wire to the conductive terminals, soldered to the conductive terminals of said insulated wire by said holding portion The method for manufacturing a rotary electric machine according to claim 7 or 8 . Method of manufacturing a rotary electric machine according to any one of claims 7 to claim 9, the stator configured through each step with a step of integrating a resin molding.

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