JP5998525B2 - Centralized power distribution member - Google Patents

Description

  The present invention relates to a concentrated power distribution member that supplies power to a coil wound around a plurality of teeth of an electric motor.

  Conventionally, a concentrated power distribution component for supplying current from an inverter to a motor coil has been proposed (see, for example, Patent Document 1).

  The concentrated power distribution component described in Patent Document 1 includes a plurality of annular conductors whose outer periphery is insulated with an electrical insulating film, and a resin that holds the plurality of annular conductors spaced apart from each other along the axial direction thereof. A holding member made of metal.

JP 2008-109718 A

  In the concentrated power distribution component described in Patent Document 1, since the outer periphery of the conductor is insulated and coated with an electric insulating film, the conductor covering process is performed by partially removing the conductor and the insulating film when the concentrated power distribution component is manufactured. A step of exposing the film is necessary.

  Moreover, when only the conductor which is not insulation-coated as an annular conductor is used, the electric current which flows into this other conductor may be influenced by the electric current which flows through this conductor being transmitted on the surface of holding | maintenance components. In order to solve this problem, when the interval between the annular conductors in the holding member is widened to ensure a sufficient distance between the annular conductors, the concentrated power distribution component is enlarged in the axial direction.

  Then, an object of this invention is to provide the concentration distribution member which can suppress an enlargement, using the conductor which is not coat | covered with an insulator as a cyclic | annular conductor.

In order to solve the above-described problems, the present invention provides a plurality of annular conductors made of a conductive material that collects and distributes power to and from a plurality of coils, and a plurality of locations along the circumferential direction of the plurality of annular conductors. And a plurality of holding members that hold the plurality of annular conductors in a state where the plurality of annular conductors are concentrically arranged, and the holding members pass through the plurality of annular conductors, respectively. A main body portion having a plurality of main body portion insertion holes, and a protrusion insertion hole that projects from the side surface of the main body portion along the annular conductor and communicates with the main body portion insertion hole. anda cylindrical projection that covers the main body portion and the tubular projections, provides centralized distribution member Ru integrally molded der by tree fat.

  In addition, the holding member may have the cylindrical protrusions corresponding to at least one of the annular conductors adjacent to each other on both side surfaces in the circumferential direction of the annular conductor in the main body portion.

  Further, the holding member may have the cylindrical protrusions corresponding to all the annular conductors of the plurality of annular conductors on both side surfaces of the annular conductor in the circumferential direction of the main body portion. Good.

  Further, the cylindrical projection may have an inner surface in the projection insertion hole in contact with an outer peripheral surface of the annular conductor.

  According to the concentrated power distribution member according to the present invention, it is possible to suppress an increase in size while using a conductor that is not covered with an insulator as the annular conductor.

It is a perspective view which shows the concentrated power distribution member which concerns on 1st Embodiment. The holding member is shown, (a) is a top view, (b) is a front view, (c) is a left side view, and (d) is a right side view. (A) is the sectional view on the AA line of FIG. 2 (a), (b) is the sectional view on the AA line of FIG. 2 (a) shown with the annular conductor hold | maintained at the holding member. It is a perspective view which shows the concentration power distribution member provided with the holding member which does not have a cylindrical protrusion. The holding member is shown, (a) is a top view, (b) is a front view, (c) is a left side view, and (d) is a right side view. It is a figure which shows the holding member of the concentration power distribution member which concerns on 2nd Embodiment. It is a figure which shows the holding member of the concentration power distribution member which concerns on 3rd Embodiment.

[First Embodiment]
Hereinafter, a configuration example of the concentrated power distribution member according to the first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a perspective view showing a concentrated power distribution member 1 according to the present embodiment.

  The central power distribution member 1 collects and distributes the drive current output from the inverter to the U phase, V phase, and W phase of coils (not shown) wound around a plurality of teeth of the motor. First to third annular conductors 11, 12, and 13 and a plurality of holding members 2 are provided.

  The first to third annular conductors 11, 12, and 13 are formed by bending a conductor made of a metal material having a circular cross section into an annular shape. The conductor is made of copper, for example. The first to third annular conductors 11, 12, 13 are so-called bare electric wires that do not have an insulator such as an insulating coating on the outer periphery thereof. In the following description, the axial direction of the first to third annular conductors 11, 12, 13 in the concentrated power distribution member 1 may be simply referred to as “axial direction”. Similarly, the radial direction and the circumferential direction of the first to third annular conductors 11, 12 and 13 may be simply referred to as “radial direction” and “circumferential direction”.

  The first annular conductor 11 has a bent portion 11a that is bent and protrudes in a U-shape toward the inside in the radial direction at predetermined angles (60 ° in the present embodiment) along the circumferential direction. Is formed by. Similarly, the second and third annular conductors 12 and 13 are also bent in a U shape toward the inside in the radial direction at predetermined angles (60 ° in the present embodiment) along the circumferential direction. The protruding bent portions 12a and 13a are formed by bending.

  The first to third annular conductors 11, 12, and 13 distribute current between the motor and the inverter (not shown) to the U-phase, V-phase, and W-phase coils (not shown) of the motor, respectively. And power supply. Six U-phase coil lead wires are connected to the first annular conductor 11 via a bent portion 11a. Six second V-phase coil lead wires are connected to the second annular conductor 12 via a bent portion 12a. The third annular conductor 13 is connected to the lead wires of six W-phase coils via the bent portion 13a.

  Both end portions of the first annular conductor 11 protrude in the axial direction, and a U-phase power supply terminal 31a is crimped. Similarly, both end portions of the second and third annular conductors 12 and 13 protrude in the axial direction, and the V-phase and W-phase power supply terminals 32a and 33a are crimped. Both ends of the first annular conductor 11 protruding in the axial direction are held by a U-phase power supply holding member 2U. Similarly, both end portions of the second and third annular conductors 12 and 13 protruding in the axial direction are held by the V-phase and W-phase power supply holding members 2V and 2W. Each of the power supply terminals 31a, 32a, and 33a is connected to a terminal (not shown) that supplies power on the inverter side.

  The first to third annular conductors 11, 12, 13 are held by a plurality of holding members 2 made of an electrically insulating mold resin in a state of being arranged concentrically in parallel along the axial direction thereof. ing.

  Each holding member 2 is disposed at a plurality of locations along the circumferential direction of the first to third annular conductors 11, 12, 13, and is disposed one by one between the adjacent bent portions 11 a, 12 a, 13 a. ing. That is, the holding member 2 is disposed at a certain angle (20 ° in the present embodiment) along the circumferential direction of the first to third annular conductors 11, 12, and 13.

  Next, details of the holding member 2 will be described with reference to FIGS. 2A and 2B show the holding member 2, wherein FIG. 2A is a top view, FIG. 2B is a front view, FIG. 2C is a left side view, and FIG. 3A is a cross-sectional view taken along line AA in FIG. 2A, and FIG. 3B is a cross-sectional view of FIG. 2A together with the annular conductors 11, 12, and 13 held by the holding member 2. It is AA sectional view.

  Each holding member 2 includes a main body 20 through which the first to third annular conductors 11, 12, and 13 are inserted, and both side surfaces 20 a and 20 b at both ends in the circumferential direction of the main body 20. A plurality of cylindrical cylindrical projections 21, 22, and 23 projecting along the annular conductors 11, 12, and 13 are integrally provided. Both side surfaces 20a, 20b have the longitudinal direction as the axial direction of the first to third annular conductors 11, 12, 13. The cylindrical protrusions 21, 22, and 23 are arranged in a line along the longitudinal direction of both side surfaces 20a and 20b.

  The main body portion 20 has a plurality of main body portion insertion holes 201, 202, 203 through which the first to third annular conductors 11, 12, 13 are inserted. The diameters of the main body part insertion holes 201, 202, 203 are the same as the outer diameters of the first to third annular conductors 11, 12, 13, and the inner surface of the main body part 20 in the main body part insertion holes 201, 202, 203. 201 a, 202 a and 203 a are in contact with the outer peripheral surfaces of the annular conductors 11, 12 and 13.

  The cylindrical protrusions 21, 22, and 23 have protrusion insertion holes 210, 220, and 230 that cover the outer peripheral sides of the first to third annular conductors 11, 12, and 13, respectively. The main body portion insertion hole 201 and the protrusion insertion hole 210, the main body portion insertion hole 202 and the protrusion insertion hole 220, and the main body portion insertion hole 203 and the protrusion insertion hole 230 communicate with each other.

  In the present embodiment, the diameters of the protrusion insertion holes 210, 220, and 230 are the same as the outer diameters of the first to third annular conductors 11, 12, and 13, and are cylindrical in the protrusion insertion holes 210, 220, and 230. The inner surfaces 210 a, 220 a, and 230 a of the protrusions 21, 22, and 23 are in contact with the outer peripheral surfaces of the annular conductors 11, 12, and 13. Thereby, the cylindrical protrusions 21, 22, 23 hold the annular conductors 11, 12, 13 on the inner surfaces 210 a, 220 a, 230 a of the main body 20 in the protrusion insertion holes 210, 220, 230.

  The cylindrical protrusions 21, 22, 23 are not connected to each other on the side surfaces 20 a, 20 b, and are separated from each other at a predetermined interval in the axial direction of the first to third annular conductors 11, 12, 13. Yes.

  In the present embodiment, the inner surface 201a, 202a, 203a of the main body 20 in the main body insertion holes 201, 202, 203 and the inner surfaces 210a, 220a of the cylindrical protrusions 21, 22, 23 in the protrusion insertion holes 210, 220, 230, 230a are formed on the same inner diameter. That is, the outer peripheral surface of the first annular conductor 11 is held in contact with the inner surface 201 a of the main body 20 in the main body insertion hole 201 and the inner surfaces 210 a of the cylindrical protrusions 21, 22, and 23 in the protrusion insertion hole 210. . The outer peripheral surface of the second annular conductor 12 is held in contact with the inner surface 202 a of the main body portion 20 in the main body portion insertion hole 202 and the inner surfaces 220 a of the cylindrical protrusions 21, 22, 23 in the protrusion insertion hole 220. The outer peripheral surface of the third annular conductor 13 is held in contact with the inner surface 203 a of the main body 20 in the main body insertion hole 203 and the inner surfaces 230 a of the cylindrical protrusions 21, 22, 23 in the protrusion insertion hole 230.

  The main body 20 and the cylindrical protrusions 21, 22, and 23 of the holding member 2 are integrally formed by resin molding. The first to third annular conductors 11, 12, 13 are held by the main body 20 and the cylindrical protrusions 21, 22, 23 of the holding member 2 by molding the holding member 2. That is, the first to third annular conductors 11, 12, 13 are molded together when the holding member 2 is molded, so that the main body insertion holes 201, 202, 203 and the protrusion insertion holes 210, 220, 230 are formed. It is formed.

As shown in FIG. 3 (b), the side surface 20a of the holding member 2 having an electrical insulating property, in 20b, the spatial distance _{D 1} of the shortest distance between the annular adjacent conductors 11, 12, 13, adjacent annular conductor and the distance along the surface of the holding member 2 between 11, 12, 13 and the creeping distance _{D 2,} the spatial distance _{D 1} and the creeping distance _{D 2} not the same, the creeping distance _{D 2} is greater than the spatial distance _{D 1} . Creepage distance _{D 2} in this case, than the spatial distance _{D 1,} the side surface 20a of the cylindrical projection 21, becomes longer by the amount of height h from 20b. In this embodiment, since the cylindrical projections 21, 22, 23 corresponding to all annular conductors 11, 12, 13 are formed, the creeping distance _{D 2} is higher than the spatial distance _{D 1,} h It is longer by × 2 (D ₂ = D ₁ + h × 2).

In order to ensure electrical insulation between the annular conductors 11, 12, 13, electricity is more easily transmitted along the creeping surface of the holding member 2 than air, so that not only the spatial distance D ₁ but also the creeping distance D ₂ is set. It is necessary to take enough. In this embodiment, the creepage distance D ₂ between the first annular conductor 11 and the second annular conductor 12 is extended by the cylindrical projection 21, a first annular conductor 11 second High insulation between the annular conductor 12 is ensured. Similarly, the creeping distance D ₂ between the second annular conductor 12 and the third annular conductor 13 is extended by the cylindrical projection 22 and 23, a second annular conductor 12 third annular conductive High insulation with the body 13 is ensured.

  Here, with reference to FIG. 4 and FIG. 5, the case where the cylindrical protrusion is not formed in a holding member is given as a comparative example. FIG. 4 is a perspective view showing a concentrated power distribution member 1A including a holding member 4 that does not have a cylindrical protrusion. 5A and 5B show the holding member 4, where FIG. 5A is a top view, FIG. 5B is a front view, FIG. 5C is a left side view, and FIG. 5D is a right side view.

As shown in FIGS. 4 and 5, the holding member 4 according to this comparative example does not have a configuration corresponding to the cylindrical protrusions 21, 22, and 23 of the holding member 2 in the first embodiment. In the holding member 4, the spatial distance D ₃ is the same as the creepage distance D ₄ .

In this comparative example, the creeping distance D ₄ is made to be the same distance as the creeping distance D ₂ of the holding member 2 of the present embodiment, it is necessary to increase the distance between the annular conductors 11, 12, 13 . Therefore, the interval between the insertion hole 410 and the insertion hole 420 of the holding member 4 and the insertion hole 420 and the insertion hole 430 in the comparative example is the same as the main body part insertion hole 201 and the main body part insertion hole 202 of the holding member 2 of the present embodiment. The distance between the main body part insertion hole 202 and the main body part insertion hole 203 is wider. In other words, the axial distance between the annular conductors 11, 12, 13 in the concentrated power distribution member 1 according to the present embodiment is narrower than in the case where the annular protrusion is not provided on the holding member 4 as in the comparative example. It has become.

(Operation and effect of the first embodiment)
According to the first embodiment described above, the following operations and effects can be obtained.

(1) The concentrated power distribution member 1 according to the present embodiment is compared with the case where the holding member 2 has the cylindrical protrusions 21, 22, and 23 and does not have the cylindrical protrusion like the holding member 4 of the comparative example. Thus, the creeping distance between the annular conductors 11, 12, 13 can be ensured while suppressing an increase in the distance between the annular conductors 11, 12, 13. That is, even if the length of the holding member 2 in the axial direction is shorter than that of the holding member 4 of the concentrated power distribution member 1A according to the comparative example, high insulation between the annular conductors 11, 12, and 13 is realized. be able to. Therefore, the enlargement of the concentrated power distribution member 1 can be suppressed while using conductors that are not covered with insulation as the annular conductors 11, 12, and 13.

(2) Since the annular conductor of the concentrated power distribution member 1 is not provided with an insulating film, the cost for providing the insulating film and the time required for manufacturing can be reduced. In addition, when the annular conductor is electrically connected to the coil lead wire or the like, the step of removing the insulator coating on the annular conductor can be reduced, thereby further reducing the cost and time required for manufacturing. be able to.

(3) Since the holding member 2 has the cylindrical protrusions 21, 22, and 23, the holding rigidity for holding the annular conductors 11, 12, and 13 can be increased. That is, if the holding member 2 in which the cylindrical protrusions 21, 22 and 23 are formed and the holding member 4 according to the comparative example having no cylindrical protrusion are formed of the same amount of resin, Resin is not used between the adjacent cylindrical protrusions 21, 22, and 23, and the cylindrical protrusions 21, 22, and 23 can be made longer in the circumferential direction by that amount. Therefore, the circumferential length of the portion of the holding member 2 that holds the annular conductors 11, 12, 13 is longer than the circumferential length of the portion of the holding member 4 that holds the annular conductors 11, 12, 13. can do. Therefore, when the holding member 2 has the cylindrical protrusions 21, 22, and 23, the holding rigidity for holding the annular conductors 11, 12, and 13 can be increased.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 6 is a view showing a holding member 2A of the concentrated power distribution member according to the second embodiment.

  In the first embodiment, the case where the cylindrical protrusions 21, 22, and 23 are formed for the first to third annular conductors 11, 12, and 13 has been described, but in the present embodiment, The arrangement of the cylindrical projections is different. Since the configuration other than this is the same as that of the concentrated power distribution member 1 according to the first embodiment, components having the same functions as those described in the first embodiment are denoted by the same reference numerals. The duplicate description will be omitted.

  The holding member 2A has a cylindrical projection 21 through which the first annular conductor 11 is inserted and a third cylindrical projection 23 on both side surfaces 20a and 20b of the main body portion 20, but the first embodiment. It does not have the cylindrical protrusion 22 in the holding member 2 which concerns on this form.

  The first annular conductor 11 and the second annular conductor 12 are inserted through the protrusion insertion holes 210 and 230 of the main body 20 and the main body insertion holes 201 and 203 of the cylindrical protrusions 21 and 23, respectively. A cylindrical protrusion is not formed in a portion of the holding member 2 where the second annular conductor 12 is inserted, and the second annular conductor 12 is inserted only through the body portion insertion hole 202 of the body portion 20. . The first annular conductor 11 and the third annular conductor are held by the main body insertion holes 201 and 203 and the protrusion insertion holes 210 and 230. Further, the second annular conductor 12 is held by the main body insertion hole 202.

The creepage distance D ₆ between the first annular conductor 11 and the second annular conductor 12 is longer by the height h of the cylindrical protrusion 21 by the cylindrical protrusion 21, thereby the first annular conductor. The insulation between the body 11 and the second annular conductor 12 is ensured. Similarly, the creeping distance D ₆ between the second annular conductor 12 and the third annular conductor 13 is longer by the height h of the cylindrical protrusion 23, thereby the second annular conductor 12. And the third annular conductor 13 are secured.

  According to the present embodiment, it is possible to obtain the same operations and effects as those described for the first embodiment.

[Third embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 7 is a view showing a holding member 2B of the concentrated power distribution member according to the third embodiment.

  In the first embodiment, the case where the cylindrical protrusions 21, 22, and 23 are formed for the first to third annular conductors 11, 12, and 13 has been described, but in the present embodiment, The arrangement of the cylindrical projections is different. Since the configuration other than this is the same as that of the concentrated power distribution member 1 according to the first embodiment, components having the same functions as those described in the first embodiment are denoted by the same reference numerals. The duplicate description will be omitted.

  The holding member 2 </ b> B has cylindrical protrusions 22 that pass through the second annular conductor 12 on both side surfaces 20 a and 20 b of the main body 20. The second annular conductor 12 is inserted through the protrusion insertion hole 220 of the main body portion 20 and the main body portion insertion hole 202 of the cylindrical protrusion 22. A cylindrical protrusion is not formed on the portion of the holding member 2 where the first annular conductor 11 and the third annular conductor 13 are inserted, and the first annular conductor 11 and the third annular conductor are not formed. Only the main body part insertion holes 201 and 203 of the main body part 20 are inserted through the body. The second annular conductor 11 is held by the main body insertion hole 202 and the protrusion insertion hole 220. The first annular conductor 11 and the third annular conductor 13 are held by the main body insertion holes 201 and 203, respectively.

A first annular conductor 11 creepage distance D ₈ between the second annular conductor 12, the partial as long height h of the cylindrical projection 22, thereby the first annular conductor 11 second Insulation with the annular conductor 12 is ensured. Similarly, the creepage distance D ₈ between the second annular conductor 12 and the third annular conductor 13 is longer by the height h of the cylindrical protrusion 22, thereby the second annular conductor 12. And the third annular conductor 13 are secured.

  According to the present embodiment, it is possible to obtain the same operations and effects as those described for the first embodiment.

  While the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. In addition, it should be noted that not all the combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

  Further, the present invention can be implemented with appropriate modifications without departing from the scope of the invention. For example, in the above embodiment, the number of the annular conductors is three, but the number of the annular conductors may be any number as long as it is two or more.

  Moreover, although the shape of the cylindrical protrusion is assumed to be a cylindrical shape, the shape is not limited to this shape, and any shape that can increase the creeping distance between the annular conductors and hold the annular conductors may be used. For example, the cylindrical protrusion may have a rectangular parallelepiped shape and an insertion hole at the center.

  Moreover, although the case where the cylindrical protrusion is formed so as to be symmetric with respect to the one side surface 20a and the other side surface 20b has been described, the present invention is not limited to this, and the cylindrical protrusion is a ring conductor adjacent to each other. It may be formed corresponding to at least one.

  Furthermore, in the above embodiment, the inner surfaces 210a, 220a, 230a of the cylindrical protrusions 21, 22, 23 in the protrusion insertion holes 210, 220, 230 are in contact with the outer peripheral surfaces of the annular conductors 11, 12, 13, There may be a gap between the protrusion insertion holes 210, 220, 230 and the annular conductors 11, 12, 13. By doing in this way, there exists an effect that creepage distance can be lengthened further.

DESCRIPTION OF SYMBOLS 1,1A ... Concentrated power distribution member, 2, 4 ... Holding member, 2U, 2V, 2W ... Feed holding member, 11 ... 1st annular conductor, 12 ... 2nd annular conductor, 13 ... 3rd annular conduction Body, 11a, 12a, 13a ... bent part, 20 ... main body part, 20a, 20b ... side face, 21, 22, 23 ... cylindrical projection, 201, 202, 203, 410, 420, 430 ... insertion hole, 201a, 202a , 203a ... inner surface, 210, 220, 230 ... projection insertion holes 210a, 220a, 230a ... inner surface, 31a, 32a, 33a ... power supply terminals

Claims (4)

A plurality of annular conductors made of a conductive material that collects and distributes power to and from a plurality of coils;
A plurality of holding members that are arranged at a plurality of locations along the circumferential direction of the plurality of annular conductors and hold the plurality of annular conductors in a state where the plurality of annular conductors are arranged concentrically;
The holding member is
A body portion having a plurality of body portion insertion holes through which the plurality of annular conductors are respectively inserted;
A cylindrical projection that covers the outer peripheral side of the annular conductor by projecting along the annular conductor from the side surface of the body portion and having a projection insertion hole that communicates with the body portion insertion hole;
Have
It said body portion and said tubular projection, central power supply member Ru integrally molded der by tree fat. The concentrated power distribution member according to claim 1, wherein the holding member has the cylindrical protrusions corresponding to at least one of the annular conductors adjacent to each other on both side surfaces in the circumferential direction of the annular conductor in the main body. . The said holding | maintenance member has the said cylindrical protrusion corresponding to all the cyclic | annular conductors among these cyclic | annular conductors in the both-sides surface of the said cyclic | annular conductor in the said main-body part. Centralized power distribution member. 4. The concentrated power distribution member according to claim 1, wherein an inner surface of the cylindrical protrusion is in contact with an outer peripheral surface of the annular conductor.

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