CN1790873A - Stator of rotating electrical machine - Google Patents

Abstract

An object of the present invention is to provide a stator of a rotating electrical machine capable of improving the efficiency of connection work between coil parts. A plurality of winding frames (4) are installed on the annular stator core (1). Coil parts (5) are respectively provided on the outer circumference of each bobbin (4). The respective coil parts (5) are connected to each other by an inter-coil part connecting body (10). The inter-coil part connector (10) has a plurality of phase connection conductors (18a, 18b, 18c, 18d) for connecting coil parts in phases and a molded insulator (19). These phase connection conductors (18a, 18b, 18c, 18d) are integrally covered by a molded insulating material (19).

Description

Stator of a rotating electrical machine

technical field

The present invention relates to a stator of a rotating electrical machine in which a plurality of winding portions are connected to each other.

Background technique

In conventional devices, a plurality of bobbins are attached to an annular stator core. A stator winding is wound on each bobbin. The initial winding end and the final winding end of each stator winding are fixed on the flanges of each winding frame. A terminal board formed in a cylindrical shape with an insulating member is placed on the flange of the bobbin.

A plurality of arc-shaped grooves are concentrically provided on the end surface of the terminal block on the side opposite to the bobbin. A plurality of insertion holes communicating with the grooves provided on the end surface on the opposite side of the winding frame are provided on the end surface of the wiring board on the side of the winding frame. The insertion holes are arranged at the positions of the initial winding end and the final winding end of the stator winding.

An arc-shaped conductive member for each phase is fitted into each groove. The conductive member for each phase protrudes from the insertion hole at the position where the insertion hole is provided. The protruding portion of the conductive member for each phase is bent in the radial direction of the stator. The curved conductive member for each phase is connected to a plurality of stator windings by connecting the starting end and the ending end of the stator winding (see Patent Document 1).

Patent Document 1: Japanese Patent Application Laid-Open No. 11-18345

In the stator of the above-mentioned conventional rotating electric machine, a plurality of conductive members for each phase are fitted into grooves provided on the terminal plate, and the conductive members for each phase are bent and projected from the insertion holes, and must be assembled for connecting each phase. Complicated work of components between stator windings.

Contents of the invention

The present invention was conceived in order to solve the above-mentioned problems, and an object of the present invention is to provide a stator of a rotating electrical machine capable of improving the efficiency of connection work between coil parts.

The stator of the rotating electrical machine of the present invention includes: a plurality of bobbin mounting parts are arranged at intervals in the circumferential direction of the ring-shaped stator core; a plurality of bobbins installed on each bobbin mounting part; Coil parts on the outer circumference of each bobbin; and an inter-coil part connecting body having annularly arranged conductors connecting a plurality of phases between the coil parts, and covering the phases as a whole Connecting conductors for integral molded insulation.

According to the stator of the rotating electric machine of the present invention, since the connecting body between the coil parts has a plurality of phase connection conductors connected between the coil parts in phases, and a molded insulator integrated by covering the phase connection conductors as a whole, it does not need For example, by fitting a plurality of phase connection conductors into the slots, the efficiency of the connection work between the coil parts can be improved.

Description of drawings

Fig. 1 is a front view showing a stator of a rotating electric machine to which a connecting body between coil parts according to Embodiment 1 of the present invention is mounted.

FIG. 2 is an explanatory diagram showing a stator structure in a region I of FIG. 1 .

Fig. 3 is a sectional view taken along line II-II of Fig. 2 .

Fig. 4 is a sectional view along line III-III of Fig. 2 .

Fig. 5 is a sectional view taken along line IV-IV of Fig. 2 .

Fig. 6 is a sectional view taken along line V-V in Fig. 2 .

FIG. 7 is an explanatory view showing the structure of a coil connection conductor molding in the region VI of FIG. 1 .

Fig. 8 is a sectional view taken along line VII-VII of Fig. 7 .

Fig. 9 is a sectional view taken along line VIII-VIII of Fig. 7 .

Fig. 10 is a sectional view taken along line IX-IX of Fig. 7 .

Fig. 11 is a cross-sectional view taken along line X-X in Fig. 2, and is an explanatory view showing a state in which a coil connection conductor molding is disposed on a bobbin.

Fig. 12 is a sectional view taken along line X-X in Fig. 2, and is an explanatory view showing a state in which the coil connection conductor molding is fixed to the bobbin.

Fig. 13 is a partial sectional view taken along line XI-XI of Fig. 2 .

14 is a cross-sectional view showing a connection portion between a bobbin and a coil connection conductor molding according to Embodiment 2 of the present invention.

15 is an explanatory diagram showing the structure of a stator of a rotating electric machine according to Embodiment 3 of the present invention.

16 is a partial cross-sectional view showing a connection portion of a phase connection conductor according to Embodiment 4 of the present invention.

17 is a cross-sectional view showing a connection portion of a trunk connection terminal according to Embodiment 5 of the present invention.

Symbol Description

1: stator core; 1a: core back; 1b: magnetic pole; 4, 40: winding frame; 4b: protruding part; 5: coil part; 10: connecting body between coil parts; 11, 12, 41, 42: coil connection conductor molding; 15: trunk line; 16: external connection terminal; 18a-18d: phase connection conductor; 19: molded insulator; 33: rivet; 35a: protrusion insertion hole; 40: claw; 41a: Claw part insertion hole.

Detailed ways

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.

(Embodiment 1)

FIG. 1 is a front view of a stator of a rotating electrical machine showing a state in which a connecting body between coil parts according to Embodiment 1 of the present invention is attached. FIG. 2 is an explanatory diagram showing a stator structure in a region I of FIG. 1 . The stator of the rotating electrical machine in this example is used for a motor that supplies three-phase (U-phase, V-phase, W-phase) alternating current.

In the drawing, a stator core 1 has an annular core back 1a and a plurality of magnetic poles (bobbin mounting portions) 1b. The core back 1a is formed by laminating silicon steel sheets. The magnetic poles 1b protrude from the core back 1a toward the inner diameter of the core back 1a at equal intervals from each other.

The bobbin 4 is attached to each magnetic pole 1b, respectively. The bobbin 4 is made of insulating resin. Coil parts 5 are respectively provided on the outer circumference of each bobbin 4 . The coil part 5 is comprised with the insulation-coated copper wire.

Here, each core back 1 a is constituted by a plurality of core pieces. Each core piece is connected to the outer diameter side of the back surface which is not shown in figure of the core back 1a. In addition, slits are provided between the respective core pieces. The magnetic pole 1b is connected to the core piece. First, the bobbin is attached to the magnetic pole 1b in a state where the core back 1a is stretched on the workbench, and the coil portion 5 is provided on the outer periphery of the bobbin 4 . Then, the stator core 1 is formed by bending the core back 1 a into a circular shape and sealing the slits between the respective core pieces to each other.

Each coil unit 5 is divided into U-phase, V-phase, and W-phase in this order. That is, the coil part 5 has the U-phase coil parts Cu1-Cu2, the V-phase coil parts Cv1-Cv2, and the W-phase coil parts Cw1-Cw2.

Moreover, each coil part 5 has the power supply connection lead wire connected to the power supply side, and the neutral phase connection lead wire connected to neutral. That is, the coil parts Cu1-Cu2 for U-phases have power supply connection lead wires Tu11-Tu121, and neutral-phase connection lead wires Tu12-Tu122. Similarly, V-phase coil parts Cv1 to Cv2 have power supply lead wires Tv11 to Tv121 and neutral phase lead wires Tv12 to Tv122, and W-phase coil parts Cw1 to Cw2 have power supply lead wires Tw11 to Tw121 and neutral phase lead wires Tw11 to Tw121. Connect the leads Tw12~Tw122.

On the axial end face side of the stator core 1 , an annular inter-coil part connection body 10 connected between the respective coil parts 5 is arranged. The inner diameter of the inter-coil connection body 10 is larger than the inner diameter of the stator core 1 . In addition, the outer diameter of the inter-coil connection body 10 is smaller than the outer diameter of the stator core 1 .

The inter-coil connection body 10 is composed of a plurality of arc-shaped coil connection conductor moldings 11 and 12 connected to each other in the circumferential direction of the stator core. That is, the inter-coil connection body 10 is equally divided along the circumferential direction of the stator core 1 . The coil connection conductor molding 12 is connected to external connection terminals 16 through a plurality of trunk lines 15 . Although not shown, the external connection terminal 16 is provided outside the motor and connected to a power supply as an external circuit.

Coil parts 5 for U-phase, V-phase, and W-phase are respectively connected to the coil connection conductor moldings 11 and 12 . That is, three coil parts 5 are connected to one coil connection conductor molding 11 , 12 .

Each coil connection conductor molding 11, 12 has: phase connection conductor 18a for neutral phase, phase connection conductor 18b for U phase, phase connection conductor 18c for V phase, and phase connection conductor 18c for W phase for connecting each coil part 5 in phases. 18 d of phase connection conductors, and the molded insulator 19 integrated by covering these phase connection conductors 18a-18d for each phase as a whole. The phase connection conductors 18a to 18d for the respective phases are strip-shaped copper plates.

The phase connection conductors 18 a to 18 d for the same phase included in the respective coil connection conductor moldings 11 and 12 are connected to each other by the phase connection conductor connection part 25 . The inter-coil part connection body 10 is formed by connecting the respective phase connection conductors 18 a to 18 d for the same phase to each other by the phase connection conductor connection part 25 .

A plurality of neutral line connection terminals 20 are connected to the phase connection conductor 18a for a neutral phase. Each neutral connection terminal 20 is connected to neutral phase connection lead wires Tu12-Tu122, Tv12-Tv122, and Tw12-Tw122, respectively. That is, the phase connection conductor 18a for neutral phases is connected to the neutral phase connection lead wires Tu12-Tu122, Tv12-Tv122, Tw12-Tw122 respectively via the some neutral line connection terminal 20. In addition, all the coil parts 5 are connected to the phase connection conductor 18a for neutral phases.

In addition, like the phase connection conductor 18a for the neutral phase, the phase connection conductor 18b for the U phase is connected to the U phase connection lead wires Tu11-Tu121 through a plurality of connection terminals 21 for the U phase, respectively, and the phase connection conductor 18c for the V phase is connected through a plurality of connection terminals 21 for the U phase. Each of the V-phase connection terminals 22 is connected to the V-phase connection leads Tv11 to Tv121, respectively, and the W-phase phase connection conductor 18d is connected to the power supply connection leads Tw11 to Tw121 through a plurality of W-phase connection terminals 23, respectively.

Next, FIG. 3 is a sectional view along line II-II of FIG. 2 . In the drawing, a lead wire connection portion 30 is provided at the end portion of the neutral line connection terminal 20 . The lead wire connection portion 30 protrudes from the molded insulator in the outer diameter direction of the stator core 1 . Lead wire insertion holes 30 a are formed on the lead wire connecting portion 30 . In addition, when the neutral line connection terminal 20 is viewed from the axial direction of the stator core 1 , the lead wire connection portion 30 does not protrude from the bobbin 4 in the outer diameter direction of the stator core 1 .

On the outer periphery of the bobbin 4 , a lead wire holding groove 4 a is provided on the radially outer side of the stator core 1 . The neutral phase connection lead Tw22 protrudes from the lead wire holding groove 4 a in the axial direction of the stator core 1 . In addition, the neutral phase connection lead wire Tw22 is inserted into the lead wire insertion hole 30a. Furthermore, after the neutral phase connection lead wire Tw22 is inserted into the lead wire insertion hole 30a, it is fixed to the lead wire connection part 30 by soldering etc., for example. In addition, the structures of the neutral phase connecting lead wires Tu12 to Tu122 , Tv12 to Tv122 , Tw12 , and Tw32 to Tw122 other than the neutral phase connecting lead wire Tw22 are the same as those of the above neutral phase connecting lead wire Tw22 .

Next, FIG. 4 is a sectional view along line III-III of FIG. 2 . Fig. 5 is a sectional view taken along line IV-IV of Fig. 2 . Fig. 6 is a sectional view taken along line V-V in Fig. 2 . In the figure, the structures of the U-phase, V-phase, and W-phase power connection leads Tu11-Tu121, Tv11-Tv121, and Tw11-Tw121 are the same as those of the neutral phase connection lead Tw22.

Next, FIG. 7 is an explanatory diagram showing the structure of the coil connection conductor molding in the VI region of FIG. 1 . In the drawing, the phase connection conductors 18b to 18d for the respective phases are respectively attached with a trunk line connection terminal 31 . In addition, crimp terminals 15 a are attached to both ends of each of the trunk lines 15 . The crimp terminal 15 a at one end is connected to the trunk connection terminal 31 . The crimp terminal 15 a at the other end is connected to an external connection terminal 16 .

Next, FIG. 8 is a sectional view along line VII-VII of FIG. 7 . Fig. 9 is a sectional view taken along line VIII-VIII of Fig. 7 . Fig. 10 is a sectional view taken along line IX-IX of Fig. 7 . In the figure, a trunk connection portion 32 is provided at the tip of the trunk connection terminal 31 . The trunk connection portion 32 protrudes from the molded insulator 19 in the radial direction of the stator core 1 . The relay connection portion 32 is bent toward the stator core 1 side. That is, the trunk connection portion 32 has an L-shaped cross section. The trunk connection portion 32 is provided with a trunk connection hole 32a.

When the trunk line connection terminal 31 is connected to the trunk line 15, the hole 32a for trunk line connection and the hole of the crimping terminal 15a overlap each other, and the rivet 33 is inserted into the overlapping hole to fix it.

Next, FIG. 11 is a cross-sectional view taken along line X-X in FIG. 2 and is an explanatory view showing a state in which a coil connection conductor molding is disposed on a bobbin. In the figure, the flange part of the bobbin 4 is provided with the protrusion part 4b which protrudes in the axial direction of the stator core 1. As shown in FIG. The coil connection conductor molding 11 is provided with a bobbin connection portion 35 protruding in the outer diameter direction of the stator core 1 . The bobbin connection part 35 is provided with the protrusion part insertion hole 35a which inserts the protrusion part 4b. The protrusion 4b is inserted into the protrusion insertion hole 35a.

Next, FIG. 12 is a sectional view taken along line X-X in FIG. 2 and is an explanatory view showing a state in which the coil connection conductor molding is fixed to the bobbin. In the figure, the coil connection conductor molding 11 is fixed on the bobbin 4 . When the coil connection conductor molding 11 is fixed on the bobbin 4, after the protrusion 4b is inserted into the protrusion insertion hole 35a, the tip of the protrusion 4b is heated and deformed by applying ultrasonic vibration, for example. In addition, the coil connection conductor molding 12 is supported by the coil connection conductor molding 11 by being connected to the adjacent coil connection conductor molding 11 .

Next, FIG. 13 is a partial sectional view along line XI-XI of FIG. 2 . In the drawing, a connection hole 36 is provided at the terminal end of the phase connection conductor 18a for neutral direction. When the adjacent coil connection conductor moldings 11 and 12 are connected, the connection holes of the neutral phase connection conductors 18a between adjacent same phases overlap, and the rivets 33 are inserted into the connection holes 36 to fix them. Both the rivets 33 and the phase connection conductors 18a to 18d are made of copper.

Similarly, between the coil connection conductor moldings 11 and 12 , the phase connection conductors 18 b to 18 d for phases other than the neutral phase phase connection conductor 18 a are connected to each other by rivets 33 in phases.

In the stator of such a rotating electrical machine, since the inter-coil connection body 10 has a plurality of phase connection conductors 18a to 18d for phases connecting the coil portions 5, and is integrated by covering these phase connection conductors 18a to 18d as a whole, Since the molded insulator 19 is simplified, there is no need to perform operations such as inserting the phase connection conductors 18a to 18d for each phase into the slots, and the efficiency of the connection work between the coil parts can be improved.

In addition, in the conventional structure where the phase connection conductors 18a to 18d for each phase are respectively embedded in the slots, since the phase connection conductors 18a to 18d are exposed at the openings of the slots, in order to prevent the phase connection conductors 18a to 18d from interfering with other Deep grooves are required for component contact, but since the phase connection conductors 18a to 18d are covered by the molded insulator 19, they do not come into contact with other components, and the coil parts can be connected. Moreover, the longitudinal depth of the machine-room-less body 10 in which the elevator traction machine is installed in the hoistway is relatively small. That is, the size of the motor can be made small. Therefore, for example, when the stator of this example is used in the motor of the elevator traction machine, the installation space of the elevator traction machine can be reduced, especially for a machine-room-less elevator in which the traction machine is installed in the hoistway, the hoistway can be further effectively reduced. Setting space in a building.

Moreover, in the past, it was necessary to prepare a large molding die for processing the entire inter-coil connection body 10, but since the inter-coil connection body 10 is composed of a plurality of arc-shaped coils connected to each other in the circumferential direction of the stator core 1, Since the connecting conductor moldings 11 and 12 are formed, the molding die for processing the inter-coil connecting body 10 can be made smaller, and the manufacturing cost can be lowered.

Also, when the coil connection conductor moldings 11, 12 are connected, since the phase connection conductors 18a-18d of the same phase are connected to each other by the rivet 33, a small space and high-strength connection can be realized. That is, when a current flows through the phase connection conductors 18a to 18d, the phase connection conductors 18a to 18d generate electromagnetic vibration, and the connection between the phase connection conductors 18a to 18d can withstand the vibration.

In addition, since the coil connection conductor molding 11 is deformed by inserting the end of the protrusion 4b into the protrusion insertion hole 35a, and fixed on the bobbin 4, it is not necessary to prepare additionally for fixing the coil connection conductor molding 11. parts on the bobbin 4 and can be fixed more easily.

In addition, the installation position of the external connection terminal 16 is generally different according to different motor specifications, but since the coil connection conductor molding 12 and the external connection terminal 16 are connected to each other by a trunk line, even if the installation position of the external connection terminal 16 changes , It is also possible to adjust and adapt by changing the length of the trunk line 15 without changing the structure of the coil connecting conductor molding 12 .

In addition, since the lead wire connection portion 30 and the trunk wire connection portion 32 protrude from the molded insulator 19 toward the outer diameter direction of the stator core 1, it is convenient to insert and operate connection tools, the wiring work can be easily performed, and the connection portion can be improved. reliability.

(Embodiment 2)

Next, FIG. 14 is a cross-sectional view showing a connection portion between a bobbin and a coil connection conductor molding according to Embodiment 2 of the present invention. In Embodiment 1, the coil connection conductor molding 11 is fixed to the bobbin 4 by deforming the end portion of the protrusion 4b inserted into the protrusion insertion hole 35a. The claws 40a of the flange portion of the frame 40 are caught in the claw insertion holes 41a provided in the coil connection conductor mold 41, and the coil connection conductor mold 41 is attached to the bobbin 40. Other structures are the same as those in Embodiment 1.

In the stator of such a rotating electrical machine, since the coil connection conductor molding 41 is attached to the bobbin 40 by hooking the claw insertion hole 41a with the claw 40a, on the basis of the effect of the first embodiment, The work for fixing the coil connection conductor molding 41 to the bobbin 40 can be performed more easily, and work efficiency can be improved.

(Embodiment 3)

Next, FIG. 15 is an explanatory diagram showing the configuration of a stator of a rotating electrical machine according to Embodiment 3 of the present invention. In Embodiment 1, the adjacent coil parts 5 for U phase, V phase, and W phase are respectively connected to the coil connection conductor moldings 11 and 12. In Embodiment 3, Two sets of adjacent coil parts 5 for U-phase, V-phase, and W-phase are connected to the coil connection conductor molding 42 . That is, production is performed in a state where two coil connection conductor moldings 11 , 12 are in total. Other structures are the same as those in Embodiment 1.

In the stator of such a rotating electric machine, since two coil connection conductor moldings 11, 12 are produced in total, the coil connection conductor moldings 11, 12 can be omitted on the basis of the effect of Embodiment 1. 12 connection operations can further improve operation efficiency.

In addition, in Embodiment 3, the number of sets of the coil part 5 connected to the coil connection conductor molded material 42 is not limited to 2 sets, The number of sets is arbitrary. Also, for example, when the outer diameter of the stator core 1 is small, one coil connection conductor molding can constitute an inter-coil part connection body, and all the coil parts can be connected to this one coil connection conductor molding.

(Embodiment 4)

Next, FIG. 16 is a partial sectional view showing a connection portion of a phase connection conductor according to Embodiment 4 of the present invention. In Embodiment 1, the phase connection conductors 18a to 18d between the same phases are connected to each other by rivets 33, but in Embodiment 4, the phase connection conductors 18a to 18d between the same phases are bent in an L-shape so that their ends are In mutual contact, a crimping sleeve 45 is inserted into the bent end, and the connection is made by squeezing the crimping sleeve. And the part which contacts between the ends of the phase connection conductors 18a-18d is welded. Other structures are the same as those in Embodiment 1.

Such a connection method of the phase connection conductors 18a to 18d can also obtain the same effect as that of the first embodiment.

(Embodiment 5)

Next, FIG. 17 is a cross-sectional view showing a connection portion of a trunk connection terminal according to Embodiment 5 of the present invention. In Embodiment 1, the trunk line connection terminal 31 and the trunk line 15 are connected by rivets 33 , while in Embodiment 5, the trunk line 15 is fixed on the trunk line connection terminal 31 by bolts and nuts 46 . Other structures are the same as those in Embodiment 1.

Such a method of fixing the trunk connection terminal 31 and the trunk 15 can also obtain the same effect as that of the first embodiment.

In addition, in Embodiments 1 to 5, a case was described in which the stator of the rotating electrical machine corresponds to a three-phase power supply, but the number of phases is not limited to three phases, and multiple phases may be used. That is, the number of phase connection conductors is not limited to 4, but may be 2, 3, 5 or more according to the technical specifications of the motor.

In addition, although the stator of the rotating electric machine has been described as a stator for a motor, it can also be used for a generator.

Claims (6)

1. the stator of an electric rotating machine is characterized in that, has:

Circular stator core, a plurality of drum stand installation portions upwards are being spaced from each other setting at interval its week;

Be installed in a plurality of drum stands on described each drum stand installation portion;

Be located at the coil portion of the periphery of described each drum stand;

Connector between coil portion, between this coil portion connector have into circular configuration, by a plurality of phase place bonding conductors of described each coil portion that is connected, and cover described phase place bonding conductor by integral body and carry out incorporate mold insulation spare.

2. the stator of electric rotating machine according to claim 1 is characterized in that, connector is made of the interconnective a plurality of circular-arc coil bonding conductor moulded parts that makes progress in the week in described stator core between described coil portion.

3. the stator of electric rotating machine according to claim 2 is characterized in that, the described phase place bonding conductor between the homophase that comprises in described each coil bonding conductor moulded parts interconnects by rivet.

4. according to the stator of any described electric rotating machine in the claim 1～3, its spy

Levy and be,

Described each drum stand is provided with the axially outstanding jut towards described stator core,

Described coil bonding conductor moulded parts is provided with the jut patchhole that inserts described jut,

Described coil bonding conductor moulded parts fixes described drum stand by make the terminal part distortion of described jut after described jut is inserted described jut patchhole.

5. according to the stator of any described electric rotating machine in the claim 1～3, it is characterized in that,

On described each drum stand, be provided with axially outstanding claw to described stator core,

On described coil bonding conductor moulded parts, be provided with the claw patchhole that tangles described claw,

Described coil bonding conductor moulded parts inserts in the hole by described claw is hung over described claw, is installed on the described drum stand.

6. according to the stator of any described electric rotating machine in the claim 1～3, it is characterized in that also having:

The external connection terminals that is connected with external circuit; With

The trunk line that connects connector and described external connection terminals between described coil portion.

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