JP2015095944A - Rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine capable of reliably wiring a winding start and a winding end of a bobbin to a predetermined position of a bus bar and capable of positioning the same to a joint portion of a bus bar, which is easy to assemble automatically.SOLUTION: The rotary electric machine is a concentrated winding type motor, which includes: a stator core 3 with open slots; and bobbins 1, 2 to be inserted into the respective tooth 31 of the stator core 3. Each of the bobbins 1, 2 has a bobbin part on which an enamel wire 4 is wound and a bus bar groove portion 5 with which the bus bar is fitted, which are integrally formed with each other. The bus bar groove portion 5 is arranged to be positioned on a back yoke of the stator core 3.

Description

  The present invention relates to a rotating electrical machine.

  Of the rotating electrical machines (electric motors (motors), generators (generators), or electrical machines having the functions of both), in the case of a concentrated winding type rotating electrical machine, the enameled wire terminal of each bobbin inserted into the stator is generally used. There are an increasing number of examples in which coils are connected to each other so as to form a motor drive circuit with a plurality of bus bars. In this case, the winding start and end of the enamel wire on each bobbin must be routed to the bus bar and connected in some way.

  Normally, the end of winding of the enameled wire and the end of winding end are routed around the space up to the bus bar and joined. However, it is not easy to automate each positioning due to the positioning accuracy of the bus bar connecting portion and the variation in the position where the coil end enamel wire is taken out.

  As mentioned above, the bus bar is installed separately from the bobbin, and as a ring shape, etc., in addition, in order to ensure insulation of each bus bar, an insulating material and a groove are attached between each bus bar, and a container structure for storing each bus bar, etc. The example to make is common. Further, for example, if the upper part (above) of the bobbin in the motor axial direction is used as a mounting position of the bus bar ring itself (hereinafter referred to as bus bar ring), the axial length of the rotating electrical machine becomes longer as a whole.

  As a countermeasure, mounting the bus burring on the yoke part of the bobbin and the stator (hereinafter referred to as the back yoke) can shorten the longitudinal direction of the motor and realize a flat motor. The mounting structure is advantageous. When this back yoke is used, the bus bar is generally made into a thin plate to secure a mounting space, and the end of the enamel wire straddles the upper part of the plurality of bus bars and entangles with protrusions provided on the bus bar. Although electrical and mechanical joining is performed, there still remains anxiety in terms of work and quality, such as alignment of the two and wiring of enamel wires in the air.

  Therefore, a method of mounting bus burring on the back yoke and a method that is easy to automate and leads to cost reduction are desired.

JP 2012-222875 A Japanese Patent No. 469715 JP 2010-136473 A

  In the methods of Patent Documents 1 to 3, since the enameled wire jumping out of the bobbin is connected to the bus bar by turning the upper surface of the bus bar, the strength of the waist of the enameled wire jumping out of the bobbin Because of this, it is not easy to automatically turn the enamel wire at a predetermined hole on the bus bar.

  In Patent Documents 1 and 2, since the bus bar ring and the bobbin are separate structures, further positioning accuracy is required, making automation difficult.

  Therefore, the present invention provides a rotating electrical machine that is suitable for automation and effective in improving assembly, in which the bobbin winding start and end can be reliably moved to a predetermined position of the bus bar and can be aligned with the bus bar joining portion. The purpose is to do.

  In order to solve the above problems, for example, the configuration described in the claims is adopted. The present application includes a plurality of means for solving the above problems. For example, in a concentrated winding type rotating electrical machine, the stator core is an open slot, and has a bobbin inserted into each tooth of the stator core. The bobbin is configured such that the bobbin portion around which the enamel wire is wound and the bus bar groove portion into which the bus bar is fitted are integrally formed, and the bus bar groove portion is positioned on the back yoke of the stator core. Features.

  According to the present invention, a rotating electrical machine that is suitable for automation and effective in improving assemblability is capable of reliably turning the start and end of bobbin winding to a predetermined position of the bus bar and aligning it with the joining portion of the bus bar. Can be provided.

The figure which shows the bobbin with an anti-fan-shaped bus-bar groove | channel. The figure which shows a fan-shaped bus-bar grooved bobbin. The figure which shows the structure of the rotary electric machine before a bus-bar assembly | attachment. The figure which shows the structure of the rotary electric machine after a bus-bar assembly | attachment. The figure which shows the structural example of a bus-bar.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 and 2 show a bus bar grooved bobbin which is one basic structure of the present invention. The bus bar grooved bobbins are alternately mounted on the teeth of the open slot stator core to constitute an electromagnetic induction generating portion of the rotating electrical machine.

  1 and 2 show a bobbin A with a bus bar groove (reference numeral 1) and a bobbin B with a bus bar groove (reference numeral 2) in which a bobbin part for winding an enamel wire and a bus bar groove part for fitting a bus bar are integrated. After mounting the enamel wire winding start introduction groove 6 for mounting the winding start of the wire on the bobbin, the enamel wire winding end introduction groove 7 for mounting the end of the enamel wire winding on the bobbin, and the bobbins A and B with busbar grooves on the stator The bus bar groove | channel 5 for mounting a bus bar is shown. By mounting the bus bar, the bobbins A (reference numeral 1) and B (reference numeral 2) with the bus bar groove serve as a stopper that prevents the core from the open slot. Further, when the bobbins A and B with bus bar grooves are mounted, the bobbin hooking unevenness 8 (the visible side is convex and the opposite side is concave) for preventing the occurrence of a step difference in the combination of the bobbins is shown.

  1 and 2, (A) shows the state before mounting the enameled wire, and (B) shows the state after mounting the enameled wire 4 (shown by a dotted line). In (B), the enamel wire 4 is wound around a bobbin, and the enamel wire winding start protruding portion 9 and the enamel wire winding end protruding portion 10 respectively protrude in the axial direction.

  By integrating the bus bar groove and the bobbin, it becomes possible to simultaneously apply to the bus bar a varnish for improving insulation retention, fixing, and heat dissipation, such as an enamel wire wound around the bobbin. The varnish introduction groove 11 is for allowing the varnish to spread over the entire bus bar at this time, and separates the wall and / or the bus bar groove part from the bus bar groove part of the bus bar groove part of the bobbin grooved bus bar groove part. A part of the wall is provided so as to be cut obliquely with respect to the radial direction. The varnish introduction groove 11 is not necessary when the bus bar is fixed with a resin other than the enameled wire varnish.

  3A shows a state in which the bus core grooved bobbins A (reference numeral 1) and B (reference numeral 2) are mounted on the stator core 3. FIG.

  First, every other bus bar grooved bobbin B having a fan-shaped outer peripheral side (bus bar groove portion) is inserted into the teeth 31 formed on the stator core 3 of the open slot. When the insertion of the bobbin with the bus bar groove of reference numeral 2 is completed, the bobbin A with the bus bar groove whose outer peripheral side (bus bar groove part) of reference numeral 1 is anti-fan-shaped is inserted into the remaining core part. Accordingly, the bus bar groove can be mounted in an annular shape without a gap on the back yoke of the cylindrical rotating electric machine.

  Part (B) of FIG. 3 shows a plurality of bus bars mounted on the bus bar groove part of part (A) of FIG. 3. In this case, the bus bar includes a neutral line on the center side, and is composed of a total of four bus bars. Note that the number of bus bars may differ depending on the circuits constituting the electromagnetic induction circuit, and the number of bus bar mounting grooves is determined according to this number.

  In the case of the bus bar shown in FIG. 3A, the bus bar is bent in a U shape in accordance with the position of the protruding portion of the wire at the beginning and end of winding of the enamel wire 4. After mounting this bus bar on the bobbin with bus bar groove, the winding start and end of the enamel wire are inserted into the U-shaped part, and the U-shaped part is electrically crimped or ultrasonically welded as shown in FIG. This is an example of mechanical coupling.

  In addition, although not shown, there is also a method of fixing by the above-described method by providing a protrusion on the bus bar according to the connection position of the enamel wire, and tying the enamel wire here.

  Even in this case, since the enamel wire protrudes in the vicinity of the bus bar, alignment can be performed very easily.

  An example of the shape of the bus bar 12 is shown in FIG. (A), (B) is an enlarged view of the A section of the bus bar 12. (A) is an example at the time of using a round line for a bus bar. This is an example in which the connecting portion at the start and end of winding of the enamel wire is bent, and further, the hooked portion is further bent inward so that energization caulking, ultrasonic welding, etc. are easily performed after the enamel wire is hooked.

  Further, the inside of the bent part of the bus bar is scratched on the unevenness in advance. Thus, in the case of energizing caulking or ultrasonic bonding, even if there is a coating of enameled wire, this is an example that is devised so as to be advantageous for coupling strength and electrical coupling.

  (B) shows an example in which the bus bar is a flat wire. Also in this case, as in the case of (A), the bent structure is further scratched on the unevenness and the same effect as in (A) is aimed at.

  As described above, the present invention relates to a rotary electric machine of a type in which a bobbin in which an enamel wire is wound by a concentrated winding method is attached to each one of the open core stator cores, and the bobbin between the core and the enamel wire is The present invention relates to a bobbin shape that improves the alignment between the start and end of winding of the bobbin enamel wire and the bus bar and facilitates the joining thereof. Specifically, a bus bar mounting groove for making each bobbin a predetermined electromagnetic induction circuit is attached to each bobbin, and the connection position with the bus bar and the start and end of winding of each bobbin. It is a new concentrated electric rotating electric machine that has a structure that makes the joining position coincide and makes workability such as positioning easy.

  In the present invention, the bobbin and the bus bar ring on which the bus bar is mounted are integrated (hereinafter referred to as a bobbin with a bus bar groove), and the winding start and end of the enamel wire wound around the bobbin with the bus bar groove are the axis of the bus bar groove portion. A groove is cut so that it passes through the lower part of the direction, and this enamel wire is sprinkled here, and the winding start of the enamel wire and the end of winding are placed on the protrusion on the top of the bus bar ring. By making it pop out, it is easy to align the bus bar and enameled wire.

  Also, by making the stator an open slot, even if the bus bar ring and bobbin are integrated (bobbin with bus bar groove), the enamel wire can be wound around the bobbin before inserting the bobbin into the core. The winding work of the wire and the routing to the groove on the bottom surface of the bus bar ring can be performed independently, and the winding work can be automated easily.

  Further, by inserting and mounting a bobbin with a bus bar groove into the stator core portion in the stator core of the open slot, a continuous bus bar ring can be formed on the back yoke side. Since the rotating electric machine has a cylindrical shape, if the bus bar ring portion is formed in a radial shape in accordance with the circumference, the bobbins with bus bar grooves interfere with each other, and it becomes impossible to mount all bobbins from the core side. In order to solve this problem, two types of bus bar ring parts of the bobbin with bus bar groove are prepared, fan-shaped and anti-fan-shaped. And then inserting the anti-fan-shaped bus bar grooved bobbin into the remaining cores, and finally a continuous bus bar ring can be formed.

  The bus bar ring is mounted in a state where the bus bar ring connecting portion and the bobbin enamel wire connecting portion are aligned with the groove portion of the bobbin with the bus bar groove. Thus, each bobbin with a bus bar groove is integrally fixed, and can also play a role of preventing the bobbin from coming off.

  In addition, regarding a rotating electrical machine that employs a concentrated winding method with an open slot type stator, the bus bar mounting part and the coil winding bobbin are integrated, and the bobbin enamel wire passes under the ring of the bus bar mounting part. Therefore, it is possible to simplify the alignment of the connection position between the bus bar and the end of the enamel wire and to facilitate the automation.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of the embodiment.

1 ... Bobbin with bus bar groove B
2 ... Bobbin A with bus bar groove
DESCRIPTION OF SYMBOLS 3 ... Stator core 4 ... Enamel wire 5 ... Bus bar groove 6 ... Enamel wire winding start introduction groove 7 ... Enamel wire winding end introduction groove 8 ... Unevenness for bobbin hook 9 ... Enamel wire winding start protruding part 10 ... Enamel wire winding end protruding part 11 ... Varnish introduction groove 12 ... Bus bar 31 ... Teeth

Claims (6)

In a concentrated winding type rotating electrical machine,
The stator core is an open slot,
A bobbin inserted into each tooth of the stator core;
The bobbin is configured such that a bobbin part around which an enamel wire is wound and a bus bar groove part into which a bus bar is fitted are integrally formed, and the bus bar groove part is configured to be positioned on a back yoke of the stator core. Rotating electric machine. In the rotating electrical machine according to claim 1,
The bobbin is composed of two types: a first bobbin in which the bus bar groove is an anti-fan shape and a second bobbin in which the bus bar groove is a fan shape,
A rotating electrical machine characterized in that an annular bus bar groove is formed by alternately inserting the first bobbin and the second bobbin into the adjacent teeth. The rotating electrical machine according to claim 2,
The bobbin includes an enamel wire winding start introduction groove and an enamel wire winding end introduction groove that pass through an axial lower portion of the bus bar groove portion,
A rotating electrical machine characterized in that the enameled wire winding start introduction groove is used for the enameled wire winding start introduction groove and the enameled wire winding end is used for the enamel wire winding end introduction groove. The rotating electrical machine according to claim 2,
The bus bar groove portion of the bobbin includes a varnish introduction groove provided obliquely in a radial direction in a part of a wall that insulates between the bus bars or a part of a wall that separates the bus bar groove part and the bobbin part. Rotating electric machine characterized by that. The rotating electrical machine according to claim 2,
The connection portion of the bus bar with the enamel wire is formed in a U shape, and unevenness is provided inside the U shape portion,
An electric rotating machine, wherein an enameled wire is disposed inside the U-shaped portion, and the bus bar and the enameled wire are electrically joined. The rotating electrical machine according to claim 2,
After inserting all the bobbins into the stator, a predetermined number of bus bars are fitted into the bus bar grooves so that the bobbins cannot be removed from the teeth.