JP2014096952A - Stator for rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator for a rotary electric machine which prevents erroneous assembly, shortens a wire winding time, improves dimensional accuracy, and reduces the number of components.SOLUTION: A stator 3 is provided in the outer circumference of a rotor 2. The stator 3 comprises: an annular stator core 8 formed by combining two or more magnetic pole units 20 each connecting 2n (n is an integer equal to or more than 1) pieces of magnetic poles 10 thereto; coils 7 wound around the magnetic poles 10; and connection members 40 for electrically connecting terminals 12 of the coils. The terminals 12 of the coils and connection parts 13 of the connection members 40 are disposed on the same circumference and in equal pitches. The coils 7 are Δ-connected by the connection parts 13 of the connection members 40 so as to form a parallel circuit and a serial circuit within the same phase. In the outer circumference of each of the magnetic pole units 20, angle positioning means 30(a) for the stator core 8 is provided at an angle position equal to the array pitch of the magnetic pole units 20.

Description

  The present invention relates to a stator of a rotating electric machine, for example, an electric power steering electric motor device that assists the steering force of a steering wheel of a vehicle.

  As a stator of a conventional electric motor device for electric power steering, in a structure in which a parallel connection and a series circuit are mixed in the same phase with a delta connection of 10 poles and 12 slots (hereinafter referred to as 10P12S). One end of one coil is connected to three connecting conductors, and the other ends of the two unit coils constituting each unit phase coil are connected to each other through a crossover conductor made of an insulated wire. (See, for example, Patent Document 1).

JP 2006-197674 A

  In the stator of the electric motor device for electric power steering, the positioning in the rotation angle direction when the coil terminal is connected to the connection conductor is not formed, and therefore normal connection cannot be made when the angle deviation occurs. . In addition, a notch is provided on the outer diameter side of the stator core, and there is a method of using this notch. However, in Patent Document 1, since the notch has a 90 ° pitch, the notched state is 90 °. When connected with, the connection is not normal. In addition, there is a method of providing positioning on the coil winding bobbin. However, the bobbin having a different shape is used for the same stator, and there is a drawback in that this member is misassembled and the number of parts increases.

  The present invention aims to solve such problems, and by providing positioning means for connecting the coil terminal to the conductive member on the outer diameter of the stator core, preventing erroneous assembly, It is another object of the present invention to provide a stator for a rotating electrical machine that shortens winding time, improves dimensional accuracy, and reduces the number of parts.

  A stator of a rotating electrical machine according to the present invention is a stator provided on an outer periphery of a rotor, and the stator is configured by combining two or more magnetic pole units to which two or more magnetic poles are connected. An annular stator core, a coil wound around each of the magnetic poles, and a conductive member that electrically connects the terminal of the coil, and the terminal of the coil and the connecting portion of the conductive member have the same circumference The coils are arranged at equal pitches, and the coils are Δ-connected by a connecting portion of the conductive member so as to form a parallel circuit and a series circuit in the same phase, and the outer periphery of each magnetic pole unit. Is provided with an angle positioning means for the stator core at an angular position equal to the arrangement pitch of the magnetic pole units.

According to the stator of the rotating electrical machine according to the present invention, when the coil terminal is connected, erroneous assembly of the coil terminal is reliably prevented by using, for example, a notch on the outer periphery of the stator core as an angle positioning means. be able to. Further, since two or more magnetic poles of the stator core are connected, the distance between adjacent magnetic poles is shortened, the winding time is shortened, and the magnetic pole of the stator core is divided into two or more units. As compared with the magnetic poles that are all connected, the size is shortened and the accuracy is improved. Furthermore, if the number of magnetic poles to be connected is increased, the number of parts is reduced, leading to cost reduction. Furthermore, since each magnetic pole unit has the same shape, it is suitable for mass production and easy to assemble.

It is sectional drawing which shows the rotary electric machine which concerns on Embodiment 1 of this invention. It is a top view which shows the magnetic pole unit in the rotary electric machine of Embodiment 1 of this invention. It is a top view which shows the structure of the stator core and connection member in the rotary electric machine of Embodiment 1 of this invention. It is an electric circuit diagram of 3P delta connection of 10P12S in the rotary electric machine of Embodiment 1 of this invention. It is a conceptual diagram which shows the relationship between the magnetic pole and annular conductive member in the rotary electric machine of Embodiment 1 of this invention. It is a top view which shows the magnetic pole unit of the rotary electric machine which concerns on Embodiment 2 of this invention. It is a top view which shows the structure of the stator core and connection member in the rotary electric machine of Embodiment 2 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding members and parts will be described with the same reference numerals.

Embodiment 1 FIG.
FIG. 1 shows the overall configuration of a rotating electrical machine (motor) 1, in which a rotor 2 and a stator 3 are built in a frame 4. The rotor 2 is regularly arranged with ten permanent magnets (not shown in detail) and is rotatably supported by two bearings 5 and 6. Although details will be described later, the stator 3 includes a coil wound around a magnetic pole constituting a stator core via a bobbin 9, and each coil terminal 12 is formed by an insulating annular member 11 attached to the bobbin 9. The connecting member 40 is connected to the supported connecting member 40, and the connecting member 40 is connected to the lead wire 14.

FIG. 2 is a view showing a part of the stator core 8 constituting the stator 3, and shows a part of the magnetic pole developed in a planar shape before being arranged in an annular shape. Here, a unit constituted by two connected magnetic poles 10 is referred to as a magnetic pole unit and is denoted by reference numeral 20. In the example shown in the first embodiment, the stator core 8 is composed of 12 magnetic poles 10, that is, 6 magnetic pole units 20.
In general, one magnetic pole unit is composed of 2n magnetic poles (where n is an integer of 1 or more).

  FIG. 2 shows one magnetic pole unit 20 in which each magnetic pole 10 is provided with a coil 7. The magnetic pole unit 20 includes a magnetic pole 10 in which a large number of electromagnetic steel plates are laminated, a coil winding bobbin 9 made of an insulating resin attached to each magnetic pole 10, and a coil wound around the bobbin 9 by a predetermined winding method. 7. A positioning hole 91 is formed in each bobbin 9 at a base portion that is not blocked by the coil 7. The two magnetic poles 10 shown in FIG. 2 are connected to form a single magnetic pole unit 20, and the stator core 8 having 12 magnetic poles 10 is formed by combining six magnetic pole units 20 having the same shape. The outer periphery of each magnetic pole unit 20 of the stator core 8 is provided with, for example, two types of cutouts having different shapes, that is, a square cutout 30 (a) and a triangular cutout 30 (b). The notch serves as an angle positioning means for the stator. Note that the shape of the cutout is not limited to a square or a triangle, and since the cutout may be at least one in one magnetic pole unit, the rest can be omitted.

  FIG. 3 shows a stator in which the stator core 8 in which six magnetic pole units 20 shown in FIG. The connecting member 40 is a general term for the first annular conductive member 40 (a), the second annular conductive member 40 (b), and the third annular conductive member 40 (c). The connecting member 40, that is, the annular conductive members 40 (a), 40 (b), and 40 (c) are attached to the insulating annular member 11 and are connected to the stator core 8 in the motor axial direction with respect to the stator core 8. It is installed side by side. The insulating annular member 11 and the bobbin 9 are coupled by fitting the positioning arms 17 provided on the insulating annular member 11 at a pitch of 90 ° into the positioning holes 91 of the bobbin 9.

  Next, the connection between the coil 7 and the connection member 40 will be described. The coil terminal 12 of the coil 7 extends from the bobbin 9 in the rotation axis direction (perpendicular to the paper surface of FIGS. 2 and 3). On the other hand, the connection portion 13 formed on the annular conductive members 40 (a), 40 (b), and 40 (c) is extended outward in the radial direction of the stator, and the terminal is U-shaped. It is bent. The connection part 13 is connected so that the coil terminal 12 may be enclosed by a U-shaped part in the location which cross | intersects the coil terminal 12. FIG. Although the coil terminal 12 and the connection part 13 are arrange | positioned on the same periphery and equal pitch, the angle positioning of the circumferential direction of which coil terminal 12 and which connection part 13 is connected in the case of a connection is carried out. Otherwise, correct circuit connection cannot be made.

  Further, the connecting member 40 is connected to the lead wire 14 of FIG. 1, but the lead wire 14 generates a magnetic field by supplying a current to the coil 7 through a switching element (not shown), and rotates the rotor 2. Let The rotating electrical machine 1 of FIG. 1 has a brushless motor structure.

  The connection of the coil terminal 12 in the rotary electric machine mentioned above is demonstrated using FIG. 4 and FIG. FIG. 4 is an electric circuit diagram of a three-phase delta connection of 10P12S, and FIG. 5 is a conceptual diagram of the connection of the connecting member 40, that is, the annular conductive members 40 (a), 40 (b), and 40 (c). The winding coil is not shown. The three phases are the U phase, V phase, and W phase, respectively, and the phase coils are also the U phase coils U1, U2, V phase coils V1, V2, and W phase coils W1, W2, which are attached to these + and − Indicates that the winding method is reversed. U 1 to W 2 correspond to the coil 7.

  As shown in FIG. 4, the rotating electrical machine according to the first embodiment is 10P12S, and has a structure in which a parallel circuit and a series circuit are mixed in the same phase. By combining six magnetic pole units 20, It constitutes a stator. Here, the magnetic pole unit 20 (a) is a coil U1 +, U1-, the magnetic pole unit 20 (b) is a coil V1-, V1 +, the magnetic pole unit 20 (c) is a coil W1 +, W1-, and the magnetic pole unit 20 (d) is a coil. U2-, U2 +, the magnetic pole unit 20 (e) are configured by coils V2 +, V2-, and the magnetic pole unit 20 (f) is configured by coils W2-, W2 +. Adjacent coils of each magnetic pole unit are directly connected to each other without a conductive member, and constitute a series circuit in the same phase.

  To realize the circuit connection of FIG. 4, as shown in the conceptual diagram of FIG. 5, the coil U1 +, the coil W2-, the coil U2 +, and the coil W1- must be connected by the annular conductive member 40 (a). Moreover, the coil V1 +, the coil U1-, the coil U2-, and the coil V2 + must be connected by the annular conductive member 40 (b). Similarly, the coil W1 +, the coil V1-, the coil W2 +, and the coil V2- must be connected by the annular conductive member 40 (c).

The connection between the coil terminal 12 of each phase coil and the connecting portion 13 of the annular conductive member 40 (a), 40 (b), 40 (c) is the annular conductive member 40 (attached to the insulating annular member 11). With respect to a), 40 (b), and 40 (c), angle positioning is performed while rotating the stator core 8, and the rotation of the stator core 8 is stopped at the position where the circuit connection shown in FIG. Done. At this time, a correct connection position must be secured. After the electrical connection, the annular conductive members 40 (a), 40 (b), 40 (c) and the stator core 8 are mechanically fixed by positioning the positioning arm 17 of the insulating annular member 11 with the bobbin 9. This is done by fitting into the hole 91.

  Explanation will be given on the angular positioning in the circumferential direction between the coil terminal 12 and the connecting portion 13 of the annular conductive member 40 (a), 40 (b), 40 (c) in order to ensure the appropriate electrical connection as described above. To do. The notches 30 (a) and 30 (b) which are positioning means provided in the magnetic pole unit 20 are different in shape, and when the stator is completed as shown in FIG. Arranged at a pitch of 60 °. One of these, for example, in the example of the first embodiment, the angular positioning in the rotational direction of the stator can be performed by fitting the protrusion 16 of the positioning jig 15 into the notch 30 (a). . At this time, since the notches 30 (a) are arranged at a 60 ° pitch, no matter which notch 30 (a) is fitted to the protrusion 16, the connecting portion 13 and the coil of the connecting member 40 are only at the 60 ° pitch. Since the terminal 12 is connected, it is not erroneously assembled. At the time of positioning, a jig may be applied not only to the notch 30 (a) but also to the notch 30 (b).

  In the above configuration, the twelve coil terminals 12 are connected to the annular conductive members 40 (a), 40 (b), and 40 (c), and constitute a Δ connection including a parallel circuit in each phase. At this time, since the two magnetic poles 10 of the stator core 8 are connected, the distance between adjacent magnetic poles is shortened, the winding time is shortened, and the magnetic pole 10 of the stator core 8 has six magnetic poles. Since it is divided into units, the dimensions are shortened compared to the magnetic poles that are all connected, so that the accuracy is improved.

  In this embodiment, one notch is provided for each magnetic pole, but the same effect can be obtained by providing two or more notches.

Embodiment 2. FIG.
The second embodiment is different from the first embodiment in the number of magnetic poles constituting the magnetic pole unit. FIG. 6 shows a state in which the coil 7 is wound around each magnetic pole of the magnetic pole unit 21 and has the same structure as that of the first embodiment except for the illustration. In the second embodiment, four magnetic poles 10 are connected to form one magnetic pole unit 21. The stator core 8 has a structure having 12 magnetic poles 10 by combining three magnetic pole units 21. Two types of notches 31 (a) and 31 (b) are provided on the outer periphery of the magnetic pole unit 21 of the stator core 8, and the notch 31 (a) at one end of the magnetic pole 10 and the remaining notches are provided. The notch and 31 (b) have different shapes. The notch 31 (b) can be omitted.

  FIG. 7 shows a configuration of a stator in which connecting members 40 are arranged in parallel in the motor axial direction. The magnetic pole unit 21 is composed of two different phase coils, and a combination of three magnetic pole units 21 constitutes a stator. Here, the first magnetic pole unit 21 is a coil U1 +, U1-, V1-, V1 +, the second magnetic pole unit 21 is a coil W1 +, W1-, U2-, U2 +, and the third magnetic pole unit 21 is a coil V2 +, V2. -, W2- and W2 +. The end of each magnetic pole unit and the adjacent coil are wound in the opposite directions to each other, and these are directly connected to each other without a conductive member, and constitute a series circuit in the same phase. On the other hand, the twelve coil terminals 12 are connected to the respective annular conductive members 40 (a), 40 (b) and 40 (c), and constitute a Δ connection including parallel circuits in each phase. At this time, since the four magnetic poles 10 of the stator core 8 are connected, the number of parts is reduced, leading to cost reduction.

Next, the circumferential angle positioning between the coil terminal 12 and the connecting portion 13 of the conductive member will be described. The notches 31 (a) and 31 (b) of the magnetic pole unit 21, which is an angle positioning means, have different shapes, and when formed on the stator, the notches 31 (a) are arranged at a pitch of 120 °. The Positioning can be performed by fitting the protrusions 16 of the positioning jig 15 into the notches 31 (a). However, since the notches 31 (a) are arranged at a pitch of 120 °, there is an error. The effect of not being assembled is the same as that of the first embodiment.

  In the above, one magnetic pole unit is constituted by four connected magnetic poles, but six magnetic poles are connected to constitute one magnetic pole unit, and two magnetic pole units are combined to have a structure having 12 magnetic poles. Then, it leads to the reduction of the number of parts further.

  In addition, although the Example demonstrates 3 phase delta connection of 10 poles 12 slots, the same effect is acquired also in 3 phase delta connection of 14 poles 12 slots.

  Although the present invention has been described above with reference to the embodiments, the present invention can be combined with each other within the scope of the invention, and the embodiments can be appropriately modified or omitted.

1 rotating electrical machine (motor), 2 rotors, 3 stators, 4 frames, 7 coils,
8 Stator core, 9 Bobbin, 10 Magnetic pole, 11 Insulating annular member, 12 Coil end, 13 Connection part of conductive member, 15 Positioning jig, 16 Positioning protrusion,
17 positioning arm, 20 magnetic pole unit,
20 (a) Magnetic pole unit U1 +, U1-, 20 (b) Magnetic pole unit V1-, V1 +, 20 (c) Magnetic pole unit W1 +, W1-, 20 (d) Magnetic pole unit U2-, U2 +, 20 (e) Magnetic pole unit V2 +, V2-, 20 (f) Magnetic pole unit W2-, W2 +, 21 Magnetic pole unit,
21 (a) Magnetic pole units U1 +, U1-, V1-, V1 +
21 (b) Magnetic pole units W1 +, W1-, U2-, U2 +,
21 (c) Magnetic pole unit V2 +, V2-, W2-, W2 +
30 (a) Notch, 30 (b) Notch, 31 (a) Notch, 31 (b) Notch, 40 Connection member, 40 (a) First annular conductive member, 40 (b) Second Annular conductive member, 40 (c) Third annular conductive member, 91 Positioning hole.

A stator of a rotating electrical machine according to the present invention is a stator of a rotating electrical machine provided on the outer periphery of the rotor, and 2n (where n is an integer of 1 or more) magnetic poles are connected to the stator. An annular stator core configured by combining two or more magnetic pole units, a coil wound around each magnetic pole, and a conductive member that electrically connects the terminal of the coil, and the terminal of the coil And the connecting portion of the conductive member are arranged on the same circumference and at an equal pitch, and a parallel circuit and a series circuit are mixed in the same phase by the connecting portion of the conductive member with respect to the coil. In the structure in which the stator is rotated to determine Δ connection , the angular position is determined, and the coil and the conductive portion are connected, a notch serving as a positioning means is provided on the outer periphery of each magnetic pole of the stator core. A certain notch in the notch Can have the same shape at equal angular positions in the arrangement pitch of the magnetic pole unit, and the notch shape are those that differ from the rest of the notch shape.

FIG. 3 shows a stator in which the stator core 8 in which six magnetic pole units 20 shown in FIG. The connecting member 40 is a general term for the first annular conductive member 40 (a), the second annular conductive member 40 (b), and the third annular conductive member 40 (c). The connecting member 40, that is, the annular conductive members 40 (a), 40 (b), and 40 (c) are attached to the insulating annular member 11, and are connected to the stator core 8 in the motor axial direction with respect to the stator core 8. It is installed side by side. The insulating annular member 11 and the bobbin 9 are coupled by fitting the positioning arms 17 provided on the insulating annular member 11 at a pitch of 120 ° into the positioning holes 91 of the bobbin 9.

Claims (7)

  A stator of a rotating electrical machine provided on an outer periphery of a rotor, wherein the stator is configured by combining two or more magnetic pole units to which 2n (n is an integer of 1 or more) magnetic poles are connected. An annular stator core, a coil wound around each of the magnetic poles, and a conductive member that electrically connects the end of the coil, and the terminal of the coil and the connecting portion of the conductive member are the same circle The coils are arranged on the circumference and at equal pitches, and the coils are Δ-connected by the connecting portions of the conductive members so as to form a parallel circuit and a series circuit in the same phase, and each of the magnetic pole units A stator for a rotating electrical machine, characterized in that an angular positioning means for the stator core is provided on the outer periphery at an angular position equal to the arrangement pitch of the magnetic pole units.   The stator of a rotating electrical machine according to claim 1, wherein the angle positioning means is a notch for receiving a positioning jig.   A stator of a rotating electrical machine provided on an outer periphery of a rotor, wherein the stator is configured by combining two or more magnetic pole units to which 2n (n is an integer of 1 or more) magnetic poles are connected. An annular stator core, a coil wound around each of the magnetic poles, and a conductive member that electrically connects the end of the coil, and the terminal of the coil and the connecting portion of the conductive member are the same circle The coils are arranged on the circumference and at equal pitches, and the coils are Δ-connected by the connecting portions of the conductive members so as to form a parallel circuit and a series circuit in the same phase, and the stator core In addition, a notch is provided on the outer periphery of each of the magnetic poles, and one of the notches has the same shape at an angular position equal to the arrangement pitch of the magnetic pole units, and the shape of the notch is Be different from the shape of the remaining notch The stator of the rotating electric machine, characterized.   The stator for a rotating electrical machine according to claim 2 or 3, wherein two or more of the notches are provided for one of the magnetic poles.   5. The rotating electrical machine according to claim 1, wherein M is the number of magnetic pole units of the stator core and θ is the arrangement pitch of the magnetic poles, and θ = 360 ° / M. stator.   6. The stator of a rotating electrical machine according to claim 1, wherein the number of poles of the rotor is 10 and the number of magnetic poles of the stator is 12 slots.   6. The stator of a rotating electrical machine according to claim 1, wherein the number of poles of the rotor is 14 and the number of magnetic poles of the stator is 12 slots.