JP2015149856A - Stator winding structure and stator manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator winding structure that has a relatively simple structure and provides excellent productivity.SOLUTION: A stator S includes: a stator core 10; a forward winding group 22a including a plurality of windings r1 to r3 that are formed by winding an element wire around the stator core 10 in a wave winding so that the wire passes a specific slot 12 and are connected in series; and a reverse winding group 22b which includes a plurality of windings r1' to r3' that are formed by winding an element wire around the stator core 10 in a wave winding so that the wire passes the same specific slot 12 as the windings r1 to r3 of the forward winding group 22a and the wire's insertion direction into the slot 12 and lead-out direction from the slot 12 are reverse to those of the forward winding group 22a and are connected in series, and to which drive current is applied so that current in the same direction as that of current flowing in the windings of the forward winding group 22a flows in the windings of the reverse winding group 22b in the slot 12. The windings of the forward winding group 22a and the windings of the reverse winding group 22b are connected in series.

Description

  The present invention relates to a stator winding structure and a stator manufacturing method in a rotating electrical machine (motor, generator, or motor / generator) used in a vehicle or the like.

  A stator of a rotating electrical machine includes a stator core and a plurality of winding groups (coils) wound around the stator core. The stator core is provided with a plurality of slots arranged at regular intervals in the circumferential direction on the inner peripheral surface, and each winding forming the winding group is in contact with the stator core so as to pass a specific slot among the slots. For example, it is wound by wave winding. In Patent Document 1, as such a stator, a copper wire having a rectangular cross section is used as a winding, thereby reducing the wire space factor (the ratio of the winding cross sectional area to the coil cross sectional area), and A device designed to be reduced in size and weight is disclosed.

JP 2001-178054 A

  In a stator of a rotating electrical machine, a winding structure capable of securing a larger torque (electric power) while suppressing an increase in size and weight has been studied. For example, for a single-phase winding, the direction of wave winding It is possible to provide two winding groups (positive winding group and reverse winding group) having different (reverse relation) winding insertion directions and lead-out directions with respect to the slots, and further to the same phase winding group. For example, it is considered to provide a plurality of winding groups in which the windings pass through slots adjacent to each other. In such a case, it is desired that the structure of the entire winding is avoided and the structure is simple and the productivity is good.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a stator winding structure in which the entire winding structure is relatively simple and the productivity is high.

  In order to solve the above-described problem, the present invention according to one aspect is a winding structure of a stator that constitutes a rotating electrical machine together with a rotor, and has a ring shape and opens inward at a plurality of circumferential positions. And a stator core having a plurality of radially extending slots, and a wire is wound around the stator core so as to pass through a plurality of specific slots among the plurality of slots, and is formed in series. A positive winding group including a plurality of windings connected to each other and a slot common to the windings of the positive winding group and the insertion direction and the leading direction of the winding with respect to the slot are opposite to the positive winding group The direction of the current that flows through the windings of the positive winding group in the slot includes a plurality of windings that are formed by winding a wire around the stator core and connected in series A reverse winding group to which a drive current is applied so that current in the same direction flows in the winding, and the winding of the positive winding group and the winding of the reverse winding group are connected in series It is.

  According to this structure, the winding direction includes a positive winding group and a reverse winding group that are different from each other in the insertion direction and the leading direction of the winding. The plurality of windings constituting the group are all connected in series, and the windings of the positive winding group and the reverse winding group are also connected in series. The structure is relatively simple. For this reason, the productivity of the stator is improved.

  In this structure, each of the plurality of windings of the positive winding group and the plurality of windings of the reverse winding group has a single continuous wire wound around the stator core by a plurality of wave windings. It is suitable that it is formed.

  According to this structure, since the connection part between windings decreases, it becomes possible to reduce connection work, such as welding of windings, and to improve productivity. In addition, by reducing the number of connected portions, it is possible to reduce the risk of occurrence of problems such as defective connections.

  As a more specific structure, for example, as a winding group of the same phase, the first winding group includes the positive winding group and the reverse winding group, respectively, and the windings are provided so as to pass through slots adjacent to each other. In the case of having the winding group and the second winding group, when the current input side is defined as the input end and the output side is defined as the output end, the positive winding group of the first winding group The output winding is connected to the input winding of the positive winding group of the second winding group, and the output winding of the positive winding group of the second winding group is the first winding group. The winding at the output end of the reverse winding group of the first winding group is connected to the winding at the input end of the reverse winding group of the second winding group. It is preferable that the windings of all winding groups of the same phase are connected in series by being connected.

  According to this structure, all winding groups of the same phase, that is, the positive winding group and the reverse winding group of the first winding group, the positive winding group and the reverse winding group of the second winding group. Since all the windings are connected in series, the structure of the entire winding becomes relatively simple while including many windings for the same phase. For this reason, the productivity of the stator is improved.

  In addition, as the same phase winding group, the first winding group and the second winding are provided so as to include the positive winding group and the reverse winding group, respectively, and the windings pass through slots adjacent to each other. In the case of having a group, when the current input side is defined as the input end and the output side is defined as the output end, the winding at the output end of the positive winding group of the first winding group is the first end. The winding at the output end of the reverse winding group of the first winding group is connected to the input end winding of the reverse winding group of the first winding group, and the input end of the positive winding group of the second winding group The windings at the output end of the positive winding group of the second winding group are connected to the windings at the input end of the reverse winding group of the second winding group. The winding groups may be connected in series.

  Also in this structure, since the windings of all winding groups of the same phase are all connected in series, the structure of the entire winding becomes relatively simple while including many windings for the same phase. . For this reason, the productivity of the stator is improved.

  In addition, as the same phase winding group, the first winding group and the second winding are provided so as to include the positive winding group and the reverse winding group, respectively, and the windings pass through slots adjacent to each other. In the case of having a group, when the current input side is defined as the input end and the output side is defined as the output end, each of the positive winding groups of the first winding group and the second winding group The windings at the input end are connected in parallel, the winding at the output end of the positive winding group of the first winding group is connected to the winding at the input end of the reverse winding group of the first winding group, A winding at the output end of the positive winding group of the second winding group is connected to a winding at the input end of the reverse winding group of the second winding group, and the first winding group and the second winding group The windings at the output end of each of the reverse winding groups may be connected in parallel.

  According to this structure, the positive winding group and the reverse winding group are connected in series in the first winding group, and the positive winding group and the reverse winding group are connected in series in the second winding group. In this respect, the structure of the entire winding becomes relatively simple.

  Further, the present invention according to another aspect for solving the above-described problem is a winding structure of a stator that constitutes a rotating electrical machine together with a rotor, and is formed in an annular shape at each of a plurality of positions in the circumferential direction. A stator core having a plurality of slots that open inward and extend radially, and a winding group of the same phase as a group of windings, a wire is wound around the stator core so as to pass through a plurality of specific slots among the plurality of slots. A positive winding group including a plurality of windings formed by being wound in a series and connected in series, passing through a slot common to the windings of the positive winding group, and an insertion direction of the winding with respect to the slot, and It includes a plurality of windings that are formed by winding a wire around the stator core and connected in series so that a lead-out direction is opposite to that of the positive winding group, and a positive winding in the slot And a reverse winding group to which a drive current is applied so that a current in the same direction as that of the current flowing in the windings flows in the windings, and the windings are provided so as to pass through slots adjacent to each other. A positive winding group in the first winding group having one winding group and a second winding group, where the side to which current is input is defined as the input end and the side to be output is defined as the output end The windings at the input ends of the reverse winding group may be connected in parallel. In this case, in each of the plurality of windings of the positive winding group and the plurality of windings of the reverse winding group, a single continuous wire is wound around the stator core by a plurality of wave windings. It is suitable that it is formed.

  According to this structure, the number of connecting portions between the windings is reduced, so that it is possible to increase the productivity by reducing the connecting work such as welding between the windings, and the number of connecting portions is reduced. It is possible to reduce the risk of occurrence of problems such as poor connection.

  More specifically, an output end winding of the positive winding group of the first winding group is connected to an input end winding of the positive winding group of the second winding group, and the first winding group A winding at the output end of the reverse winding group is connected to a winding at the input end of the reverse winding group of the second winding group, and each of the positive winding group and the reverse winding group in the second winding group The windings at the output end are connected in parallel.

  According to this structure, the winding of the positive winding group of the first winding group and the winding of the positive winding group of the second winding group are connected in series, and the winding of the reverse winding group of the first winding group is connected. Since the wire and the winding of the reverse winding group of the second winding group are connected in series, the structure of the entire winding is relatively simple in this respect.

  In the winding structure of each stator described above, the strand is a cross-sectional triangle having two equal sides, and the plurality of windings of the positive winding group and the plurality of windings of the reverse winding group are: It is preferable that the windings are inserted into the specific slots in a state where they are arranged in a line in the radial direction of the stator core so that the equal sides of adjacent windings come into contact with each other.

  According to this structure, adjacent windings are inserted into the slots in a state of being arranged so as to overlap in the radial direction (overlapping state). Therefore, the space occupied by the winding group in the slot can be effectively reduced as compared with the case where the cross-sectional shape of the winding (element wire) is circular or rectangular (rectangular).

  Further, in the winding structure of each stator described above, when the forward winding group and the reverse winding group are defined as coil members, the stator includes a plurality of coil members arranged in the radial direction of the stator core. It may be provided.

  According to such a configuration, a stronger magnetic field can be formed, and a larger output torque (generated power) can be received in the rotating electrical machine to which the stator is applied.

  On the other hand, the stator manufacturing method of the present invention is the above-described stator manufacturing method for a rotating electrical machine, and is a winding group set having the same shape as the forward winding group and the reverse winding group wound around the stator core. A winding forming step of forming a solid body alone in advance, a winding inserting step of inserting the winding group assembly into the stator core in a state of being compressed and deformed in the radial direction, and inserting the winding group assembly into the stator core The winding group assembly is expanded in diameter, and the winding group assembly is inserted into the slot from the inside of the stator core, thereby forming the positive winding group and the reverse winding group. A line mounting process.

  According to this method, the above-described stator can be efficiently manufactured.

  When the forward winding group and the reverse winding group are defined as coil members, a plurality of coil members are provided in the stator core so that the stator is arranged in the radial direction of the stator core. In the winding forming step, the winding group assembly of each coil member is formed in advance, and the winding group of the coil member located radially outside the stator core among the plurality of coil members. It is preferable to form each coil member on the stator core by performing the winding insertion step and the winding mounting step in order from the assembly.

  A stator including a plurality of coil members can be efficiently manufactured.

  As described above, according to the present invention, it is possible to provide a stator with a relatively simple structure of the entire winding and good productivity.

1 is a schematic perspective view showing a stator of a rotating electrical machine according to the present invention. It is a longitudinal section schematic diagram showing a stator. It is a plane section schematic diagram showing a stator. It is a principal part enlarged view of FIG. FIG. 3 is a developed longitudinal cross-sectional schematic diagram showing a winding path of a winding group, where (a) shows a winding path of a first U-phase winding group, and (b) shows a winding of a second U-phase winding group. Indicates the route. FIG. 2 is a developed plan schematic view (top view) showing a winding path of a first U-phase winding group, (a) showing a winding path of a forward winding group, and (b) showing a reverse winding group. The winding path of is shown. FIG. 3 is a developed plan schematic view (top view) showing a winding path of a second U-phase winding group, (a) showing a winding path of a forward winding group, and (b) showing a reverse winding group. The winding path of is shown. It is a cross-sectional schematic diagram which shows the wiring state of the winding group derived | led-out from the slot, (a) followed the VIIIa-VIIIa line | wire of FIG. 6b, (b) followed the VIIIb-VIIIb line | wire of FIG. It is a cross-sectional schematic diagram. It is a cross-sectional schematic diagram which shows the wiring state of the winding group on the axial direction end surface of a stator core, (a) is the IXa-IXa line of FIG. 6, (b) is the IXb-IXb line of FIG. (C) is a schematic cross-sectional view taken along the line IXc-IXc in FIG. 6, and (d) is a schematic cross-sectional view taken along the line IXd-IXd in FIG. It is a schematic diagram which shows the connection structure of the coil | winding of a 1st, 2nd U-phase winding group. (A)-(c) is explanatory drawing explaining the manufacturing method of a stator. (A)-(c) is explanatory drawing explaining the other example of the manufacturing method of a stator. It is a schematic diagram which shows the connection structure of the coil | winding of a 1st, 2nd U-phase winding group. It is a schematic diagram which shows the connection structure of the coil | winding of a 1st, 2nd U-phase winding group. It is a schematic diagram which shows the connection structure of the coil | winding of a 1st, 2nd U-phase winding group. It is a schematic diagram which shows the modification of the arrangement | sequence of the coil | winding in a slot.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  1 to 3 schematically show a stator S of a rotating electrical machine according to the present invention, FIG. 1 is a perspective view, and FIGS. 2 and 3 are cross-sectional views showing the stator S, respectively.

  The stator S shown in the figure is a stator used for a three-phase AC motor mounted on a hybrid vehicle. Specifically, a three-phase AC motor (corresponding to the rotating electrical machine of the present invention) is configured by the stator S, a rotor disposed inside the stator S, a casing that accommodates the stator S and the rotor, and the like.

  The stator S includes an annular stator core 10 and a first coil member 14A and a second coil member 14B each including a plurality of winding groups wound around the stator core 10.

  As shown in FIG. 3, the stator core 10 includes a plurality of slots 12 that open inward at a plurality of positions arranged at equal intervals in the circumferential direction and extend radially. In this example, the three-phase AC motor is an eight-pole motor, and the stator core 10 has two slots per one phase and one pole. That is, the stator core 10 includes a total of 48 slots 12. As will be described in detail later, each of the U-phase, V-phase, and W-phase winding groups is wound around the stator 10 so as to pass through a specific plurality of slots 12 among the 48 slots 12. . In other words, the stator core 10 includes two adjacent slots 12 into which U-phase winding groups are respectively inserted, two adjacent slots 12 into which V-phase winding groups are respectively inserted, and W A total of eight sets of slot groups are provided in the circumferential direction of the stator core 10, with two adjacent slots 12 into which phase winding groups are inserted as one set.

  In FIG. 3, the slots 12 into which the U-phase winding groups are respectively inserted are denoted by reference numerals U1, U2, U3, U4,... U15, U16, and the slots 12 into which the V-phase winding groups are respectively inserted. Are indicated by reference numerals V1, V2, V3, V4,..., V15, V16, and slots 12 into which W-phase winding groups are respectively inserted are indicated by reference signs W1, W2, W3, W4,. In the following description, the symbols U1, U2, U3, U4,... U15, U16 shown in FIG. Similarly, the symbols V1, V2, V3, V4,... V15, V16 in the figure are used as the symbols of the slots into which the V-phase winding groups are respectively inserted, and the slots into which the W-phase winding groups are respectively inserted. W1 · W2, W3 · W4... W15 · W16 are used.

  The stator core 10 is configured by stacking and integrating a plurality of plates made of a magnetic material (steel plate) having a shape as shown in FIG. 3, for example.

  The first coil member 14 </ b> A and the second coil member 14 </ b> B each include a plurality of winding groups wound around the stator core 10. The basic configuration of the first coil member 14A and the second coil member 14B is the same except that the second coil member 14B is provided inside the first coil member 14A. Therefore, in the following description, after the first coil member 14A is described in detail, the second coil member 14B is referred to as necessary.

  The first coil member 14A includes a pair of U-phase winding groups 20Ua and 20Ub (first U-phase windings) wound around the stator core 10 so as to pass through the slots U1, U2, U3, U4,. And a pair of V-phase windings wound around the stator core 10 so as to pass through the slots V1, V2, V3, V4,..., V15, V16. Wound around stator core 10 so as to pass through groups 20Va and 20Vb (referred to as first V-phase winding group 20Va and second V-phase winding group 20Vb) and slots W1, W2, W3, W4,. And a set of two W-phase winding groups 20Wa and 20Wb (referred to as a first W-phase winding group 20Wa and a second W-phase winding group 20Wb).

  The U-phase winding groups 20Ua and 20Ub, the V-phase winding groups 20Va and 20Vb, and the W-phase winding groups 20Wa and 20Wb have the same basic configuration except that they pass through different slots 12. Therefore, in the following description, the configuration of the U-phase winding groups 20Ua and 20Ub is described in detail, and the configuration of the V-phase winding groups 20Va and 20Vb and the W-phase winding groups 20Wa and 20Wb is referred to as necessary. I will do it. Further, in the following description, when referring to the upper (upper) and lower (lower), the state of the stator S shown in FIG. 1 is used as a reference, and when referring to the inner (inner) and outer (outer), the radial direction of the stator core 10 is used as a reference. And

  In this example, the first U-phase winding group 20Ua and the second U-phase winding group 20Ub, the first V-phase winding group 20Va and the second V-phase winding group 20Vb, the first W-phase winding group 20Wa and the second W-phase winding are used. The line group 20Wb corresponds to the first winding group and the second winding group of the present invention, respectively.

  The first U-phase winding group 20Ua is composed of a plurality of windings formed by strands having a triangular cross section having two equal sides. In this example, as shown in FIG. 4, it is composed of a total of six windings formed by strands having a regular triangular cross section. Specifically, as shown in the figure, the first U-phase winding group 20Ua includes a positive winding group 22a including three windings r1 to r3 and a reverse winding including three windings r1 ′ to r3 ′. Group 22b. The forward winding group 22a and the reverse winding group 22b are coil end portions (portions disposed on the outside of the slot, that is, on the axial end surfaces of the stator core 10 (upper and lower end surfaces)). The current flows in opposite directions in the circumferential direction, and the current is supplied in the slot so that the current flows in the same direction. As described in detail later, the winding is inserted into the slot 12. The direction and the derivation direction are opposite to each other.

  Similarly, as shown in FIG. 4, the second U-phase winding group 20Ub is composed of a total of six windings formed by strands having a regular triangular cross section. Specifically, the second U-phase winding group 20Ub includes three windings r4 to r6. And a reverse winding group 24b composed of three windings r4 'to r6'.

  Each U-phase winding group 20Ua, 20Ub is wound around the stator core 10 by wave winding as shown in FIGS. More specifically, the positions of the slots U1 and U2 will be described as a reference. First, the positive winding group 22a of the first U-phase winding group 20Ua includes the stator core 10 as shown in FIGS. 5 (a) and 6 (a). It is inserted into the slot U1 from the lower side and led out to the upper side, inserted into the slot U4 from the upper side of the stator core 10 and led out to the lower side, and inserted into the slot U5 from the lower side of the stator core 10 and led out to the upper side. As a result, it is wound around the stator core 10 so as to pass through the slots U1, U4, U5, U8, U9, U12, U13, U16.

  As shown in FIG. 5A and FIG. 6B, the reverse winding group 22b of the first U-phase winding group 20Ua is inserted into the slot U1 from the upper side of the stator core 10 and led out to the lower side. The stator core 10 is wound around the stator core 10 so that it is inserted into the slot U4 from the lower side and led out to the upper side, inserted into the slot U5 from the upper side of the stator core 10 and led out to the lower side. That is, the reverse winding group 22b has the same slots U1, U4, U5, U8, and the same as the positive winding group 22a in a state where the inserting direction and the leading direction of the winding with respect to the slot 12 are opposite to those of the positive winding group 22a. It is wound around the stator core 10 so as to pass through U9, U12, U13, and U16.

  The windings r1 to r3 of the forward winding group 22a and the windings r1 'to r3' of the reverse winding group 22b are arranged in a line in the radial direction of the stator core 10 (left and right in FIG. 4), as shown in FIG. Inserted in the slots U1, U4 to U16 in an aligned state. Specifically, among the windings r1 to r3 and r1 ′ to r3 ′, the windings r1 to r3 of the positive winding group 22a are continuously arranged on one side in the radial direction so that the sides of adjacent ones are in contact with each other. The windings r1 'to r3' of the reverse winding group 22b are inserted in the slots U1 and U4 to U16 in a row in a row so as to be adjacent to the positive winding group 22a. . That is, the positive winding group 22a and the reverse winding group 22b of the first U-phase winding group 20Ua are arranged in the slots U1, U4 to U-shaped so that the cross-sectional shape of the entire first U-phase winding group 20Ua is a parallelogram. It is inserted in U16. However, as shown in FIGS. 6A and 6B, in the forward winding group 22a and the reverse winding group 22b, the positional relationship between the inside and the outside in the radial direction of the stator core 10 is alternated for each of the slots U1 and U4 to U16. Is wound around the stator core 10 so as to be replaced.

  On the other hand, as shown in FIGS. 5B and 7A, the positive winding group 24a of the second U-phase winding group 20Ub is inserted into the slot U2 from the lower side of the stator core 10 and led out to the upper side. The slots U2, U3, U6, U7, U9 are inserted into the slot U3 from the upper side of the stator core 10 and led out to the lower side, inserted into the slot U6 from the lower side of the stator core 10 and led out to the upper side. The stator core 10 is wound by wave winding so as to pass through U10, U11, U14, and U15.

  As shown in FIG. 5B and FIG. 7B, the reverse winding group 24b of the second U-phase winding group 20Ub is inserted into the slot U2 from the upper side of the stator core 10 and led out to the lower side. It is wound around the stator core 10 so that it is inserted into the slot U3 from the lower side and led out to the upper side, inserted into the slot U6 from the upper side of the stator core 10 and led out to the lower side. That is, the reverse winding group 24b has the same slots U2, U3, U6, U7, and the same as the positive winding group 24a in a state where the insertion direction and the leading direction of the winding with respect to the slot 12 are opposite to those of the positive winding group 24a. The stator core 10 is wound by wave winding so as to pass through U9, U10, U11, U14, and U15.

  The windings r4 to r6 of the positive winding group 24a and the windings r4 'to r6' of the reverse winding group 24b are shown in FIG. 4 as with the winding groups 22a and 22b of the first U-phase winding group 20Ua described above. As described above, the stator cores 10 are inserted into the slots U2, U3 to U15 in a state of being arranged in a line in the radial direction. As for the second U-phase winding group 20Ub, as shown in FIGS. 7 (a) and 7 (b), the forward winding group 24a and the reverse winding group 24b have the stator core 10 in each of the slots U2, U3 to U15. Is wound around the stator core 10 so that the positional relationship between the inside and the outside in the radial direction is alternately switched.

  The first U-phase winding group 20Ua and the second U-phase winding group 20Ub have the same orientation of the windings r1 and r4 located on the radially outermost side of the stator core 10, as shown in FIGS. Thus, in this example, the windings r1, r4 are inserted into the slots U1, U2,... U15, U16 so that the corners of the windings r1 and r4 face the same circumferential direction (the lower side in FIG. 4).

  The positive winding group 22a of the first U-phase winding group 20Ua and the positive winding group 24a of the second U-phase winding group 20Ub have cross-sectional shapes of the positive winding group 22a and the positive winding group 24a at the coil end portion. They are arranged along the axial direction of the stator core 10 so as to form a parallelogram (trapezoid) as a whole.

  Specifically, the windings r1 to r3 of the positive winding group 22a (first U-phase winding group 20Ua) led out from the slot U1 to the upper side of the stator core 10 are, as shown in FIG. The line groups 22a are arranged in a trapezoidal cross section. In addition, the reverse windings r4 to r6 of the forward winding group 24a (second U-phase winding group 20Ub) led out from the slot U2 to the upper side of the stator core 10 are arranged so that the cross-sectional shape is a trapezoid, As shown in FIG. 8 (b), the positive winding group 22a and the positive winding group 24a are superposed on the lower side of the positive winding group 22a so that the cross-sectional shapes thereof become a parallelogram as a whole. 8A is a schematic cross-sectional view of the winding group along the line VIIIa-VIIIa in FIG. 6, and FIG. 8B is a schematic cross-sectional view along the line VIIIb-VIIIb in FIG. It is.

  As shown in FIGS. 6 (a) and 7 (a), the positive winding group 22a of the first U-phase winding group 20Ua and the positive winding group 24a of the second U-phase winding group 20Ub are stacked as described above. As it goes to the next slot U3, U4, it is arranged along the upper end surface of the stator core 10 so as to be displaced radially inward of the stator core 10. First, as shown in FIG. 7A, the positive winding group 24a (windings r4 to r6) of the second U-phase winding group 20Ub located on the lower side is inserted into the slot U3 from the upper side of the stator core 10. . In this case, the positive winding group 24a is inserted into the slot U3 so that the windings r4 to r6 are arranged in a line in the radial direction of the stator core 10.

  On the other hand, in the positive winding group 22a (windings r1 to r3) of the first U-phase winding group 20Ua, the windings r1 to r3 are arranged in a line in the radial direction of the stator core 10 as shown in FIG. The stator core 10 is inserted into the slot U4 from above.

  Here, the arrangement of the positive winding groups 22a and 24a in the upper coil end portion of the stator core 10 has been specifically described. However, in the lower coil end portion, the upper and lower relationships of the positive winding groups 22a and 24a are related. In other words, the arrangement is vertically symmetrical with the arrangement of FIG. The other arrangements of the positive winding groups 22 a and 24 a are basically common to both the upper and lower sides of the stator core 10.

  Here, the positive winding groups 22a and 24a have been described, but the arrangement of the reverse winding groups 22b and 24b at the upper and lower coil end portions of the stator core 10 is basically the same as that of the positive winding groups 22a and 24a. It is. That is, the arrangement is equivalent to the arrangement in which the windings r1 to r3 and the windings r4 to r6 in FIGS. 8A and 8B are replaced with the windings r1 ′ to r3 ′ and the windings r4 ′ to r6 ′.

  In this way, the first U-phase winding group 20Ua and the second U-phase winding group 20Ub are wound around the stator core 10. The first U-phase winding group 20Ua and the second U-phase winding group 20Ub are sequentially inserted into a pair of adjacent slots U1, U2, U3, U4,... U15, U16, as described above (FIG. 5). The first U-phase winding group 20Ua and the second U-phase winding group 20Ub are alternately arranged in the circumferential direction with respect to a pair of adjacent slots U1, U2, U3, U4, U15, U16. It is inserted into the slot 12 on the different side. That is, the winding group derived from the odd-numbered slot 12 is inserted into the next even-numbered slot 12, while the winding group derived from the even-numbered slot 12 is inserted into the next odd-numbered slot 12. Inserted into. As a result, as described above, the first U-phase winding group 20Ua is inserted into the slots U1, U4, U5, U8, U9, U12, U13, U16, and the second U-phase winding group 20Ub is inserted into the slot slots U2, U3. , U6, U7, U9, U10, U11, U14, U15. In this way, the first U-phase winding group 20Ua and the second U-phase winding group 20Ub are wound around the stator core 10, so that the positive winding group 22a and the positive winding group 24a do not cross each other, and The first U-phase winding group 20Ua and the second U-phase winding group 20Ub are wound around the stator core 10 by wave winding without the reverse winding group 22b and the reverse winding group 24b intersecting each other.

  The configuration of the U-phase winding groups 20Ua and 20Ub has been described in detail above. Basically, the positions of the slots 12 through which the V-phase winding groups 20Va and 20Vb and the W-phase winding groups 20Wa and 20Wb pass are different. Has the same configuration as the U-phase winding groups 20Ua and 20Ub.

  In the upper and lower coil end portions of stator core 10, U-phase winding groups 20 Ua and 20 Ub, V-phase winding groups 20 Va and 20 Vb, and W-phase winding groups 20 Wa and 20 Wb are adjacent to each other in the radial direction of stator core 10. The lead-out positions are displaced radially inward or outward of the stator core 10 from the lead-out position to the slot 12 to be inserted next from the lead-out position. It is inserted into the next slot 12 at a different radial position.

  This point will be specifically described with reference to FIGS. 8B and 9A to 9D. FIG. 8B is a schematic cross-sectional view of the winding group along the line VIIIb-VIIIb in FIG. 6 as described above, that is, a schematic cross-sectional view of the winding group at a position between the slot U2 and the slot V1. 9A to 9D are schematic cross-sectional views of the winding groups along the IXa-IXa line, IXb-IXb line, IXc-IXc line, and IXd-IXd line of FIG. 6, that is, the slot V1. It is a cross-sectional schematic diagram of the winding group between each slot in -U3.

  As shown in these drawings, at the position between the slot U2 and the slot V1, as shown in FIG. 8B, the positive winding group 22a and the second U-phase winding group 20Ub of the first U-phase winding group 20Ua are provided. The positive winding group 24a is vertically stacked. Then, the reverse winding group 22b of the first W-phase winding group 20Wa and the reverse winding group 24b of the second W-phase winding group 20Wb are similarly stacked on the inside of the U-phase winding groups 20Ua and 20Ub. Further, the reverse winding group 22b of the first V-phase winding group 20Va and the reverse winding group 24b of the second U-phase winding group 20Vb are similarly stacked on the inner side.

The reverse winding group 22b of the second V-phase winding group 20Va located at the innermost position at the position of the slot V1 is inserted into the slot V1, while the positive winding of the second V-phase winding group 20Va from the slot V1. By deriving the group 22a, at the position between the slot V1 and the slot V2, as shown in FIG. 9A, the positive winding group 22a of the first V-phase winding group 20Va becomes the U-phase winding group 2
It is superimposed on the outside of 0 Ua and 20 Ub.

  Next, the reverse winding group 24b of the second V-phase winding group 20Vb located at the innermost position at the position of the slot V2 is inserted into the slot V2, while the positive winding of the second V-phase winding group 20Vb from the slot V2 is inserted. Since the winding group 24a is derived, the positive winding group 24a of the second V-phase winding group 20Vb becomes U-phase winding at the position between the slot V2 and the slot W1, as shown in FIG. 9B. On the outside of the groups 20Ua and 20Ub, the second V-phase winding group 20Va is overlaid on the lower side of the positive winding group 22a.

  Then, the reverse winding group 22b of the innermost second W-phase winding group 20Wa is inserted into the slot W1 at the position of the slot W1, while the positive winding of the second W-phase winding group 20Wa is inserted from the slot W1. As a result of the winding group 22a being derived, the positive winding group 22a of the second W-phase winding group 20Wa becomes a V-phase winding at a position between the slot W1 and the slot W2 as shown in FIG. 9C. Superposed on the outside of the groups 20Va, 20Vb.

  Then, the reverse winding group 24b of the second W-phase winding group 20Wb located at the innermost position at the position of the slot W2 is inserted into the slot W2, while the positive winding of the second W-phase winding group 20Wb from the slot W2 is inserted. Since the winding group 24a is derived, the positive winding group 24a of the second W-phase winding group 20Wb becomes a V-phase winding at a position between the slot W2 and the slot U3 as shown in FIG. On the outside of the groups 20Va and 20Vb, they are superimposed on the lower side of the positive winding group 22a of the second W-phase winding group 20Wa.

  In this way, the U-phase winding groups 20Ua and 20Ub, the V-phase winding groups 20Va and 20Vb, and the W-phase winding groups 20Wa and 20Wb are arranged adjacent to each other in the radial direction of the stator core 10, and are respectively formed from the slots 12. The winding groups 20Ua, 20Ub, 20Va, 20Vb, 20Wa, and 20Wb are inserted into the slot 12 while being displaced radially inward of the stator core 10 from the lead-out position toward the next slot 12. Are guided in the next slot 12 while maintaining a compact arrangement without crossing each other.

  Note that the positive winding groups 22a and 24a and the reverse winding group 22b included in the U phase winding groups 20Ua and 20Ub, the V phase winding groups 20Va and 20Vb, and the W phase winding groups 20Wa and 20Wb, respectively, of the stator S. 24b are connected as follows in this example.

  FIG. 10 schematically shows the structures of the positive winding groups 22a and 24a and the reverse winding groups 22b and 24b of the U-phase winding groups 20Ua and 20Ub. The white circle in the figure indicates the winding start end of the winding, and the black circle indicates the winding end end of the winding (the same applies to FIGS. 13 to 15).

  Four windings (r1 to r3, r1 ′ to r3 ′, r4 to r6, r4 ′ to r6 ′) constituting the winding groups 22a, 22b, 24a, and 24b of the U-phase winding group 20Ua and 20Ub are respectively Each element wire is formed by being wound around the stator core 10 three times by wave winding so as to pass through the predetermined slot 12 described above. Each winding group 22a, 22b, 24a, 24b is connected in series in a predetermined order. Specifically, as shown in the figure, the winding end a2 of the positive winding group 22a of the first U-phase winding group 20Ua is the winding start end a1 'of the positive winding group 24a of the second U-phase winding group 20Ub. The winding end a2 ′ of the positive winding group 24a is connected to the winding start end b1 of the reverse winding group 22b of the first U-phase winding group 20Ua, and the winding end b2 of the reverse winding group 22b is It is connected to the winding start end b1 'of the reverse winding group 24b of the second U-phase winding group 20Ub. The winding start end a1 of the positive winding group 22a of the first U-phase winding group 20Ua is used as the current input section 30, and the winding end end b2 'of the reverse winding group 24b of the second U-phase winding group 20Ub is the middle. The sex point is 32. That is, when the current input side is the input end and the output side is the output end, the winding r3 at the output end of the positive winding group 22a of the first U-phase winding group 20Ua is the second U-phase winding. The winding r6 at the output end of the positive winding group of the second U-phase winding group 20Ub is connected to the winding r4 at the input end of the positive winding group 24a of the group 20Ub, and the reverse winding of the first U-phase winding group 20Ua. The winding r1 'at the output end of the reverse winding group 22b of the first U-phase winding group 20Ua is connected to the winding r1' at the input end of the group 22b, and the reverse winding group 24b of the second U-phase winding group 20Ub. By connecting to the winding r4 'at the input end, all the winding groups 22a, 22b, 24a, 24b of the same phase (U phase) are connected in series.

  Here, the connection structure of the positive winding groups 22a and 24a and the reverse winding groups 22b and 24b of the U-phase winding groups 20Ua and 20Ub has been described, but the positive winding group 22a of the V-phase winding groups 20Va and 20Vb, 24a and the reverse winding groups 22b and 24b, and the positive winding groups 22a and 24a and the reverse winding groups 22b and 24b of the W-phase winding groups 20Wa and 20Wb have the same structure.

  The configuration of the first coil member 14A has been described above, but the configuration of the second coil member 14B is also equivalent to the first coil member 14A. As shown in FIGS. 3 and 4, the second U-phase winding group 20Ua of the second coil member 14B is aligned in the radial direction of the stator core 10 with respect to the first U-phase winding group 20Ua of the first coil member 14A. The second U-phase winding group 20Ub of the second coil member 14B is inserted into the second U-phase winding group 20Ub of the first coil member 14A so as to be arranged in the same slot 12 as the first U-phase winding group 20Ua. On the other hand, they are arranged in the same slot 12 as the second U-phase winding group 20Ub so as to be aligned in a row in the radial direction. The same applies to the V-phase winding groups 20Va and 20Vb and the W-phase winding groups 20Wa and 20Wb of the second coil member 14B.

  As described above, the stator S includes the first U-phase winding group 20Ua having the positive winding group 22a and the reverse winding group 22b as the U-phase winding group, and the positive winding group 24a and the reverse winding group. The second U-phase winding group 20Ub each having 24b is included, but as described above, each winding group 22a, 22b, 24a, 24b is composed of one strand, and the winding groups 22a, 22b. 24a and 24b are all connected in series. The same applies to the V-phase winding groups 20Va and 20Vb and the W-phase winding groups 20Wa and 20Wb. Therefore, although the structure includes many windings for the same phase, the structure of the entire winding is simple and the productivity is relatively low with little waste.

  Further, the windings of each winding group 20Ua, 20Ub, 20Va, 20Vb, 20Wa, 20Wb are formed by strands having a regular triangular cross section, and windings r1 to r3, r1 'to r3' (windings r4 to r6, r4 ' ˜r6 ′) are inserted into the slot 12 in a state in which the sides are in contact with each other and arranged in a line. That is, adjacent windings are inserted into the slot 12 in a state where they overlap in the radial direction of the stator core 10 while being aligned in a row (overlapping state). Therefore, the space occupied by the winding group in the slot can be effectively reduced as compared with the case where the cross-sectional shape of the winding (element wire) is circular or rectangular (rectangular). In addition, winding groups 20Ua and 20Ub (20Va, 20Vb, 20Vb, 20Vb, 20Vb, 20Vb, 20Vb, 20Vb, 20Vb, 20Vb, 20Ab, 20Vb 20Wa, 20Wb) windings r1 to r3, r4 to r6r1 'to r3' (windings r1 'to r3', r4 'to r6') are gathered and arranged so that adjacent windings are connected to the stator core 10 Are arranged in an overlapping state in an axial direction and a radial direction. Therefore, the space occupied by the winding groups 20Ua, 20Ub, 20Va, 20Vb, 20Wa, and 20Wb can be kept small on the axial end surface of the stator core 10 as well. Therefore, according to the stator S, the space occupied by the winding groups 20Ua, 20Ub, 20Va, 20Vb, 20Wa, and 20Wb in the slot 12 and on the axial end surface of the stator core 10 (that is, the coil end portion) is effectively suppressed. This also has the advantage that the stator S can be reduced in size and weight.

  The stator S described above can be manufactured according to a method as shown in FIG. 11, for example. That is, a winding group assembly 34 having the same shape as that of the coil member 14A wound around the stator core 10 (winding groups 20Ua, 20Ub, 20Va, 20Vb, 20Wa, 20Wb) is independently formed in advance (winding formation). Step) In a state where the entire winding group assembly 34 is compressed and deformed in the radial direction, it is inserted inside the stator core 10 as shown in FIGS. Thereafter, the winding group assembly inserted inside the stator core 10 is expanded in diameter, and the winding groups 20Ua, 20Ub, 20Va, 20Vb, 20Wa, and 20Wb are inserted into the predetermined slots 12 from the inside of the stator core 10. Thus, the winding group assembly 34 is mounted on the stator core 10 (winding mounting step). And the stator S provided with two coil members 14A and 14B as shown in FIG. 2 is manufactured by repeating the said process.

  According to such a method, the stator S can be efficiently manufactured as compared with the case where the winding groups 20Ua, 20Ub, 20Va, 20Vb, 20Wa, and 20Wb are formed while winding the strands around the stator core 10. Is possible. In this case, in the winding insertion step, as shown in FIGS. 12A and 12B, only one end side in the axial direction of the winding group assembly 34 is radially reduced. The entire winding group assembly 34 may be compressed and deformed in a substantially truncated cone shape, and the winding group assembly 34 may be inserted into the stator core 10 from the reduced diameter side. According to such a method, the diameter of the winding group can be easily increased in the winding mounting process, so that the stator can be manufactured more efficiently.

  11 and 12, the stator S including the two coil members 14A and 14B is manufactured by repeating the above steps. However, for example, in the winding forming step, the two coil members 14A and 14B are previously provided. May be formed and inserted into the stator core 10.

  By the way, the stator S mentioned above is illustration of preferable embodiment of the stator of the rotary electric machine which concerns on this invention, The concrete structure can be suitably changed in the range which does not deviate from the summary of this invention. For example, it is possible to adopt the following configuration.

  For example, as a connecting structure of the positive winding groups 22a and 24a and the reverse winding groups 22b and 24b included in the U-phase winding groups 20Ua and 20Ub, the V-phase winding groups 20Va and 20Vb, and the W-phase winding groups 20Wa and 20Wb. In addition to the structure shown in FIG. 10, the structures shown in FIGS. 13 to 15 may be applied. Hereinafter, the connection structure of each figure is demonstrated.

  FIG. 13 schematically shows the connection structure of the positive winding groups 22a and 24a and the reverse winding groups 22b and 24b of the U-phase winding groups 20Ua and 20Ub. In the structure of FIG. 10, the winding groups 22a, 22b, 24a, and 24b are connected in series as in the structure of FIG. 10, but the order is different from that of FIG. That is, in the structure of FIG. 13, the winding end a2 of the forward winding group 22a of the first U-phase winding group 20Ua is connected to the winding start end b1 of the reverse winding group 22b of the first U-phase winding group 20Ua. The winding end b2 of the winding group 22b is connected to the winding start end a1 'of the positive winding group 24a of the second U-phase winding group 20Ub, and the winding end a2' of the positive winding group 24a is connected to the second U-phase winding. It is connected to the winding start end b1 'of the reverse winding group 24b of the wire group 20Ub. The winding start end a1 of the positive winding group 22a of the first U-phase winding group 20Ua is used as the current input section 30, and the winding end end b2 'of the reverse winding group 24b of the second U-phase winding group 20Ub is the middle. The sex point is 32. That is, when the current input side is the input end and the output side is the output end, the winding r3 at the output end of the positive winding group 22a of the first U-phase winding group 20Ua is the first U-phase winding. The winding r1 ′ at the input end of the reverse winding group 22b of the group 20Ua is connected to the winding r3 ′ at the output end of the reverse winding group 22b, and the input end of the positive winding group 24a of the second U-phase winding group 20Ub. The winding r4 of the positive winding group 24a is connected to r4 ′ of the reverse winding group 24b of the second U-phase winding group 20Ub, thereby connecting the same phase (U-phase). ) All winding groups 22a, 22b, 24a, 24b are connected in series.

  Here, the structures of the positive winding groups 22a and 24a of the U-phase winding groups 20Ua and 20Ub and the reverse winding groups 22b and 24b have been described. However, the positive winding groups 22a and 24a of the V-phase winding groups 20Va and 20Vb are described. The reverse winding groups 22b and 24b, and the positive winding groups 22a and 24a and the reverse winding groups 22b and 24b of the W-phase winding groups 20Wa and 20Wb have the same structure.

  Also in the case of such a structure of the stator S, since all the winding groups 22a, 22b, 24a, 24b of the same phase are connected in series, the structure of the entire winding is simple as in the structure of FIG. Thus, the stator S with good productivity and relatively little waste is obtained.

  FIG. 14 schematically shows the structures of the positive winding groups 22a and 24a and the reverse winding groups 22b and 24b of the U-phase winding groups 20Ua and 20Ub. In the structure of FIG. 14, the winding start ends a1 and a1 'of the positive winding groups 22a and 24a of the U-phase winding groups 20Ua and 20Ub are connected, and the connection ends serve as the current input section 30, and the first U The winding end a2 of the positive winding group 22a of the phase winding group 20Ua is connected to the winding start end b1 of the reverse winding group 22b of the first U phase winding group 20Ua, and the positive winding group of the second U phase winding group 20Ub. The winding end end a2 'of 22a is connected to the winding start end b1' of the reverse winding group 22b of the second U-phase winding group 20Ub. Then, the winding end ends b2 and b2 'of the respective reverse winding groups 22b and 24b of the U-phase winding groups 20Ua and 20Ub are connected, and this connection end is set as a neutral point 32. That is, the windings r1 and r4 at the input ends of the positive winding groups 22a and 24a of the first U-phase winding group 20Ua and the second U-phase winding group 20Ub are connected in parallel, and the first U-phase winding group 20Ua The winding r3 at the output end of the winding group 22a is connected to the winding r ′ at the input end of the reverse winding group 22b of the first U-phase winding group 20Ua, and the positive winding group 24a of the second U-phase winding group 20Ub. The output end winding r6 is connected to the input end winding r4 'of the reverse winding group 24b of the second U-phase winding group 20Ub, and each of the first U-phase winding group 20Ua and the second U-phase winding group 20Ub The windings r3′r6 ′ at the output ends of the reverse winding groups 22b and 24b are connected in parallel.

  Here, the structures of the positive winding groups 22a and 24a of the U-phase winding groups 20Ua and 20Ub and the reverse winding groups 22b and 24b have been described. However, the positive winding groups 22a and 24a of the V-phase winding groups 20Va and 20Vb are described. The reverse winding groups 22b and 24b, and the positive winding groups 22a and 24a and the reverse winding groups 22b and 24b of the W-phase winding groups 20Wa and 20Wb have the same structure.

  According to such a structure of the stator S, the forward winding group 22a and the reverse winding group 22b of the first U-phase winding group 20Ua are connected in series, and the positive winding group 24a of the second U-phase winding group 20Ub and Since the reverse winding group 24b is connected in series, the winding structure is simple in this respect.

  FIG. 15 schematically shows the structures of the positive winding groups 22a and 24a and the reverse winding groups 22b and 24b of the U-phase winding groups 20Ua and 20Ub. In the structure of FIG. 15, the winding start ends a1 and b1 of the winding groups 22a and 22b of the first U-phase winding group 20Ua are connected, and the connection ends serve as the current input section 30, and the first U-phase winding group The winding end a2 of the positive winding group 22a of 20Ua is connected to the winding start end a1 'of the positive winding group 24a of the second U-phase winding group 20Ub, and the winding of the reverse winding group 22b of the first U-phase winding group 20Ub The end b2 is connected to the winding start end b1 ′ of the reverse winding group 24b of the second U-phase winding group 20Ub. Then, the winding end ends a2 'and b2' of the respective winding groups 24a and 24b of the second U-phase winding group 20Ub are connected, and this connecting end is set as a neutral point 32. That is, when the current input side is defined as the input end and the output side is defined as the output end, the windings at the input ends of the forward winding group 22a and the reverse winding group 22b in the first U-phase winding group 20Ua are defined. The wires r1 and r1 ′ are connected in parallel, and the winding r3 at the output end of the positive winding group 22a of the first U-phase winding group 20Ua is the winding at the input end of the positive winding group 24a of the second U-phase winding group 20Ub. The winding r3 ′ at the output end of the reverse winding group 22b of the first U-phase winding group 20Ua is connected to the winding r4 ′ at the input end of the reverse winding group 24b of the second U-phase winding group 20Ub. In the second U-phase winding group 20Ub, the windings r6 and r6 ′ at the output ends of the forward winding group 24a and the reverse winding group 24b are connected in parallel.

  Here, the structures of the positive winding groups 22a and 24a of the U-phase winding groups 20Ua and 20Ub and the reverse winding groups 22b and 24b have been described. However, the positive winding groups 22a and 24a of the V-phase winding groups 20Va and 20Vb are described. The reverse winding groups 22b and 24b, and the positive winding groups 22a and 24a and the reverse winding groups 22b and 24b of the W-phase winding groups 20Wa and 20Wb have the same structure.

  According to such a structure of the stator S, the positive winding group 22a of the first U-phase winding group 20Ua and the positive winding group 24a of the second U-phase winding group 20Ub are connected in series, and the first U-phase winding group Since the reverse winding group 22b of 20Ua and the reverse winding group 24b of the second U-phase winding group 20Ub are connected in series, the winding structure is simple in this respect.

  In the above embodiment, the windings r1 to r3, r1 ′ to r3′r4 to r6, and r4 ′ to r6 ′ of the winding groups 20Ua, 20Ub, 20Va, 20Vb, 20Wa, and 20Wb are equilateral triangles in section. The windings r <b> 1 to r <b> 3 and the like may be a cross-sectional triangle having two equal sides (a cross-section isosceles triangle). For example, the windings r <b> 1 to r <b> 3 and the like may be of an isosceles triangle with a right section. In this case, for example, the windings r1 to r3, r1 ′ to r3′r4 to r6, and r4 ′ to r6 ′ forming the U-phase winding groups 20Ua and 20Ua are adjacent to each other so that the equal sides are in contact with each other. The U-phase winding groups 20Ua and 20Ua as a whole are parallelograms (trapezoids) in the U-phase winding groups 20Ua and 20Ua, which are inserted into the slots 12 while being arranged in a line in the radial direction of the stator core 10. The U-phase winding groups 20Ua and 20Ua may be arranged along the axial direction of the stator core 10 so as to be. The same applies to the V-phase winding groups 20Va and 20Vb and the W-phase winding groups 20Wa and 20Wb.

  In addition, the windings r1 to r3, r1 ′ to r3′r4 to r6, and r4 ′ to r6 ′ of the winding groups 20Ua, 20Ub, 20Va, 20Vb, 20Wa, and 20Wb have a cross-sectional rectangle or a circular shape in addition to a cross-sectional triangle. May be. Even when the windings r1 to r3, r1 ′ to r3′r4 to r6, and r4 ′ to r6 ′ having a rectangular cross section or a circular cross section are used, the structure shown in FIGS. 10 and 13 to 15 is used. Thus, it is possible to provide the stator S with high productivity by simplifying the structure of the winding.

  Moreover, although the stator S of the said embodiment is provided with two sets of coil members 14A and 14B, only one set may be sufficient as a coil member, and three or more sets may be provided.

  In the stator S of the above embodiment, each winding group 20Ua, 20Va, 20Wa (20Ub, 20Vb, 20Wb) is a positive winding group 22a (24a) composed of three windings r1 to r3 (r4 to r6). The reverse winding group 22b (24b) is composed of the windings r1 'to r3' (r4 'to r6'), but the positive winding group 22a (24a) and the reverse winding group 22b (24b). The number of windings is not limited to three and can be changed.

  In the stator S of the above embodiment, as shown in FIG. 4, for example, the positive winding group 22a of the first U-phase winding group 20Ua has a winding r1 at the current input end radially outside the stator core 10 (see FIG. 4). The windings r1 to r3 are arranged in the slot 12 so that the winding r3 at the output end is located on the radially inner side. However, as shown in FIG. The arrangement of Moreover, other arrangement | sequences as shown to FIG.16 (b)-FIG.16 (e) may be sufficient. However, in the arrangement shown in FIG. 4 and FIG. 16A, when one forward wire group 22a (reverse winding group 22b) is to be configured, the winding r1 and the winding in the slot 12 are wound. Since the direction of r2 is different and the directions of the winding r2 and the winding r3 are also different, it is necessary to twist the strand twice when inserting the winding into the slot 12. On the other hand, for example, according to the arrangement of FIG. 16B, the directions of the winding r1 and the winding r2 are the same and only the directions of the winding r2 and the winding r3 are different. When inserting the wire, twisting the wire only once. Similarly, in FIG. 16C to FIG. 16E, the number of times of twisting the wire is only one. Therefore, according to the arrangements of FIGS. 16B to 16E, compared to the arrangements shown in FIG. 4 and FIG. is there.

  In the stator S of the above embodiment, 48 slots and 8 poles have been specifically described. However, the number of slots and the number of poles are not limited to this, and the stator is a combination of other slots and poles. It is also applicable to.

  In addition, although this embodiment demonstrated the stator applied to a three-phase alternating current motor, of course, the stator of this invention is applicable also to a generator, a motor and generator, etc.

DESCRIPTION OF SYMBOLS 10 Stator core 12 Slot 14A 1st coil member 14B 2nd coil member 20Ua 1st U phase winding group 20Ub 2nd U phase winding group 20Va 1st V phase winding group 20Vb 2nd V phase winding group 20Wa 1st W phase winding group 20Wb Second W-phase winding group 22a, 24a Positive winding group 22b, 24b Reverse winding group S Stator r1-r3, r1'-r3 'winding r4-r6, r4'-r6' winding

Claims (12)

A winding structure of a stator that constitutes a rotating electric machine together with a rotor,
A stator core having a plurality of slots that are annular and extend radially inward at a plurality of circumferential positions,
A positive winding group including a plurality of windings that are formed by winding a wire around the stator core and connected in series so as to pass through a specific plurality of slots among the plurality of slots; In addition, the strands pass through the stator core so that the winding passes through a common slot with the winding of the positive winding group and the insertion direction and the leading direction of the winding with respect to the slot are opposite to those of the positive winding group. The drive current includes a plurality of windings that are formed by winding and connected in series, and the current in the same direction as the current flowing in the windings of the positive winding group in the slot flows in the windings. And a reverse winding group,
A winding structure of a stator, wherein a winding of the forward winding group and a winding of the reverse winding group are connected in series. The stator winding structure according to claim 1,
The plurality of windings of the positive winding group and the plurality of windings of the reverse winding group are each formed by winding a single continuous wire around the stator core with a plurality of wave windings. A winding structure of a stator, characterized in that In the stator winding structure according to claim 1 or 2,
A first winding group and a second winding group that include the positive winding group and the reverse winding group, respectively, and are provided so that the windings pass through slots adjacent to each other, as the same-phase winding group. Have
When the input side is defined as the input side and the output side is defined as the output end,
The winding at the output end of the positive winding group of the first winding group is connected to the winding at the input end of the positive winding group of the second winding group, and the positive winding group of the second winding group The output end winding is connected to the input end winding of the reverse winding group of the first winding group, and the output end winding of the reverse winding group of the first winding group is the second winding group. A stator winding structure characterized in that the windings of all winding groups of the same phase are connected in series by being connected to the input end winding of the reverse winding group. In the stator winding structure according to claim 1 or 2,
A first winding group and a second winding group that include the positive winding group and the reverse winding group, respectively, and are provided so that the windings pass through slots adjacent to each other, as the same-phase winding group. Have
When the input side is defined as the input side and the output side is defined as the output end,
The winding at the output end of the positive winding group of the first winding group is connected to the winding at the input end of the reverse winding group of the first winding group, and the reverse winding group of the first winding group The output end winding is connected to the input end winding of the positive winding group of the second winding group, and the output end winding of the second winding group is the second winding group. A stator winding structure characterized in that all winding groups of the same phase are connected in series by being connected to the input end winding of the reverse winding group. In the stator winding structure according to claim 1 or 2,
A first winding group and a second winding group that include the positive winding group and the reverse winding group, respectively, and are provided so that the windings pass through slots adjacent to each other, as the same-phase winding group. Have
When the input side is defined as the input side and the output side is defined as the output end,
The windings at the input end of each positive winding group of the first winding group and the second winding group are connected in parallel, and the winding at the output end of the positive winding group of the first winding group The winding at the output end of the positive winding group of the second winding group is connected to the input winding of the reverse winding group of the first winding group, and the input of the reverse winding group of the second winding group A stator winding structure characterized in that the windings at the output ends of the first winding group and the reverse winding group of the second winding group are connected in parallel to each other. . A winding structure of a stator that constitutes a rotating electric machine together with a rotor,
A stator core having a plurality of slots that are annular and extend radially inward at a plurality of circumferential positions,
As a winding group of the same phase, a plurality of windings that are formed by winding a wire around the stator core by wave winding so as to pass through a plurality of specific slots among the plurality of slots and connected in series A positive winding group including a wire, passing through a common slot with the winding of the positive winding group, and so that the insertion direction and the leading direction of the winding with respect to the slot are opposite to the positive winding group, The wire includes a plurality of windings that are formed by wave winding around the stator core and connected in series, and the current in the same direction as the direction of the current flowing through the windings of the positive winding group in the slot is wound. Each having a first winding group and a second winding group provided so that the windings pass through slots adjacent to each other. ,
When the input side is defined as the input side and the output side is defined as the output end,
The stator winding structure, wherein windings at input ends of the positive winding group and the reverse winding group in the first winding group are connected in parallel. The stator winding structure according to claim 6,
The plurality of windings of the positive winding group and the plurality of windings of the reverse winding group are each formed by winding a single continuous wire around the stator core with a plurality of wave windings. A winding structure of a stator, characterized in that The stator winding structure according to claim 7,
The output winding of the positive winding group of the first winding group is connected to the input winding of the positive winding group of the second winding group, and the reverse winding group of the first winding group The winding at the output end is connected to the winding at the input end of the reverse winding group of the second winding group, and the windings at the output ends of the positive winding group and the reverse winding group in the second winding group The stator winding structure is characterized in that are connected in parallel. The stator winding structure according to any one of claims 1 to 8,
The strand is a triangular cross section having two equilateral sides, and the plurality of windings of the positive winding group and the plurality of windings of the reverse winding group are such that the equilateral sides of adjacent windings come into contact with each other. A stator winding structure, wherein the stator core is inserted into the specific slot in a state of being arranged in a row in a radial direction of the stator core. In the stator winding structure according to any one of claims 1 to 9,
When the positive winding group and the reverse winding group are defined as coil members,
The stator includes a plurality of coil members arranged in the radial direction of the stator core. A method for manufacturing a stator for a rotating electrical machine according to any one of claims 1 to 10,
A winding forming step of previously independently forming a winding group assembly having the same shape as the forward winding group and the reverse winding group wound around the stator core;
A winding insertion step of inserting the winding group assembly into the stator core in a state of being compressed and deformed in the radial direction;
By expanding the diameter of the winding group assembly inserted inside the stator core and inserting the winding group assembly into the slot from the inside of the stator core, the forward winding group and the reverse winding A winding mounting step for forming a wire group, and a stator manufacturing method. The stator of the rotating electrical machine according to claim 11,
When the positive winding group and the reverse winding group are defined as coil members, the stator is provided with a plurality of coil members arranged in the stator core in a radial direction,
In the winding forming step, the winding group assembly of each coil member is formed in advance, and among the plurality of coil members, the winding group set of coil members located on the radially outer side of the stator core A method for manufacturing a stator, comprising: forming each coil member on the stator core by performing the winding insertion step and the winding mounting step in order from a solid body.

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