MXPA98004130A - Alternator stator arrangement for vehic - Google Patents

Abstract

The present invention relates to an alternator stator for a vehicle including a stator core and a multi-stator stator winding, the stator winding is composed of a plurality of conductor segments having a pair of conductor members connected to each other forming a first coil end group positioned at an axial end of the stator core so that the first U-turn portions of the conductor segments are surrounded by the second U-turn portions of the conductor segments and a second group of coil end placed at the other axial end of the stator core so that the ends of the conductor segments are connected to form imbricate windings

Description

ALTERNATOR STATOR ARRANGEMENT FOR VEHICLE BACKGROUND OF THE INVENTION 1. FIELD OF THE INVENTION The present invention relates to a stator arrangement of an alternator driven by an internal combustion engine for a vehicle such as a passenger car, a truck, or a boat. 2. DESCRIPTION OF THE RELATED TECHNIQUES In a manufacturing process of the stator of an alternator for a vehicle, a plurality of conductive segments similar to hair nozzles (having a turning portion) are inserted into corresponding grooves and connected to each other instead of winding a continuous wire . Because the previous stator _ needs many junction points, an automatic wire connection machine is indispensable to reduce the cost of production. This stator of an alternator for a vehicle that has conductive segments is described REF: 27542 in PCT Patent Application 92/06527. The joining portions of a plurality of conductor segments are annularly positioned at an axial end of the stator core and these are automatically welded. It is also described that four segments are placed in a slot, and that those specific segments are formed in advance to the joint portions corresponding to the inversion portions and the intermediate portions. Patent Application PCT 92/06527 describes, as shown in Figure 21 of this application, a corrugated winding formed of segments, two conductive members of which are respectively placed in an outer layer and in an inner layer in a groove. Figure 20 shows a winding diagram for a winding of a phase. Numbers placed on a line in the center indicate the slot number. A solid line indicates a conductor member inserted in the A position of the slot shown in Figure 21, a line of a string of a 'dot indicates a member in position B, a line of a string of two dots indicates a member in position C, and a dashed line indicates the same member in position D.

A plurality of the conductor segments includes some base segments 105 that have the same length and the same shape. The base segment 105 has two straight conductor members respectively placed in grooves spaced apart from each other at a pole spacing. A winding is formed from a plurality of the base segments placed and connected in a regular pattern. However, this winding has four conductor members in a groove, thereby forming four corrugated windings wound around the stator core. In order to connect four windings in series, specific segments different from the base segments have to be used. The specific segments of this case include the specific segment 100 for connecting the first and second turn windings, the specific segment 101 for connecting the second and third turn windings and the specific segment 102 for connecting the third and fourth turn windings 102. In order to have two output terminals XI, X2, two specific segments 103, 104 are used. As a result, in order to form the winding of one phase, five different specific segments are necessary. The output terminals XI, X2 are placed apart from each other with a pole spacing to avoid interference with the base segments of the Y phase and Z phase windings because each of the output terminals XI, X2 is one of the conductor members inserted in the outer layer in the groove. In this way, the above conventional winding needs five specific segments to form the winding of a phase. In other words, a four-loop winding is formed around the stator core by connecting the conductor segments having four conductor members inserted in the same slot in the stator described in PCT Patent Application 92/06527. The step of inserting the segments into the slots and the step of connecting the ends of the segments to form an annular winding are the same with all the segments. Another annular winding is formed in the same slots as the previous slots. Two other annular windings are formed in the grooves that move with three slots separated from the previous slots for the first two annular windings. In this way, four annular windings are formed.

? In order to form an individual winding of four turns when connecting the four annular windings, it is necessary to cut each of the annular windings in one portion (four portions 5 in total) and connect the windings to each other in the cut portions. Therefore, five specific segments are needed, three specific segments to connect three other annular windings and two specific segments for the output terminals. The five specific segments can not be put together at one end of the coil in a one pole spacing, because the four ring windings are formed in two groups moved to a separation of three grooves with each other and do not stack in the radial direction at the ends of coil. If two conductor members (half of the previous number) are inserted into a slot, it is It is possible to put the specific segments on one coil end in a gap of one slot, together. However, the reduction in the number of turns can not provide the output voltage of the alternator at a ba at speed.

Figure 20 shows that conductor members extending from the inner layer are connected to conductive members extending from the outer layer at the joint portions 106. Therefore, the conductive members that extend both from the inner and outer layers of the respective grooves are inclined in the same direction, and do not interfere with each other. In the stator winding described in PCT Patent Application 92/06527, the link portions 106 are placed annularly at one end of the stator core. Therefore, if the stator is small, the intervals between the joint portions become too small for the connection. In this way, the increase in the number of specific segments and the decrease in the interval between the joining portions makes the stator manufacturing steps more difficult and the production cost higher. PCT Patent Application 92/06527 teaches that overlapping windings of the stator winding can be formed from the segments. However, there is no detailed description about this.

The object of the present invention is to provide a stator having a substantial number of conductor members in a slot with a small number of annular windings.

BRIEF DESCRIPTION OF THE INVENTION The present invention is made in view of the above problems and to provide a stator having easily formed windings of conductive segments. In more detail, the present invention is to provide a stator having sufficient numbers of conductor members in each of the slots using few specific segments. According to a main feature of the invention, a stator winding has a plurality of large U-shaped conductor segments and small U-shaped conductor segments connected together to form a first coil-end group positioned at an axial end. of the stator core, so that the small conductor-shaped segments are surrounded by the large U-shaped conductor segments, and a second coil-end group placed on the other axial end of the stator core, so that the ends of the U-shaped conductive segments are connected respectively to form a coil wound in an imbricated form, for each pole.

BRIEF DESCRIPTION OF THE DRAWINGS Other objects, features and features of the present invention as well as the functions of the related parts of the present invention will become clear from a study of the following, detailed description, appended claims and drawings. In the drawings: Figure 1 is a cross-sectional view of an alternator for a vehicle according to a first embodiment of the present invention; Figure 2 is a fragmentary view of ur5 stator according to the first embodiment; Figure 3 is a schematic view of a conductor segment according to the first embodiment; - Figure 4 is a portion of a winding diagram of the stator according to the first embodiment; Figure 5 is a portion of a winding diagram of the stator according to the first embodiment; Figure 6 is a portion of a winding diagram of the stator according to the first embodiment; Figure 7 is a circuit diagram according to the first embodiment; Figure 8 is a schematic diagram of a first coil end group of the stator according to a second embodiment of the invention; Figure 9 is a portion of a winding diagram of the stator according to the second embodiment; Figure 10 is a portion of a winding diagram of the stator according to the second embodiment; Figure 11 is a portion of a schematic diagram of a first coil end group of the stator according to a third embodiment of the invention; Figure 12 is a portion of a winding diagram of the stator according to the third embodiment; Figure 13 is a portion of a winding diagram of the stator according to the third embodiment; Figure 14 is a schematic diagram of a first coil end group of the stator according to a fourth embodiment of the invention; Figure 15 is a portion of a winding diagram of the stator according to the fourth embodiment; Figure 16 is a portion of a winding diagram of the stator according to the fourth embodiment; Figure 17 is a circuit diagram according to another embodiment of the invention; Figure 18 is a circuit diagram according to another embodiment of the invention; Figure 19 is a circuit diagram according to another embodiment of the invention; Figure 20 is a circuit diagram of a conventional stator; Y Figure 21 is a diagram of the portion of a conventional stator - having conventional conductive members placed in a slot.

DETAILED DESCRIPTION OF THE PREFERRED MODALITIES [First Mode] It is described with reference to Figures 1-7, a stator core according to a first embodiment of the present invention. The alternator 1 is composed of the stator 2 that functions as an armature, the rotor 3 functions as a magnetic field, and the housing 4 to support the stator 2 and the rotor 3, and the rectifier to convert the energy from alternating current to energy direct current. The rotor 3 rotates together with the shaft 6 and is composed of a pole core 7 Lundell type, field coil 8, slip rings 9, 10 and cooling fans 11, 12. The shaft 6 is linked to the pulley 20 to be driven by a motor (not shown) mounted on a vehicle. The Lundell-type pole core 7 is composed of a pair of pole core members. Each of the pole core members 7 is comprised of the raised portion 71 fitted to the shaft 6, the disk portion 72 extending radially from the raised portion 71 and a plurality of hook poles 73.

Air intake windows 41 are formed at an axial end of the housing 4, and air discharge windows 42 are formed in the shoulder portions of the housing 4 opposite the first coil end group 31a and the second coil end group 31b. . The stator 2 is composed of the stator core 32, a stator winding placed in the slots 35 formed in the stator core 32 and the insulators 34 for insulating the conductive members of the stator core 34. As shown in Figure 2, the stator core 32 has 36 grooves formed at equal intervals corresponding to the number of poles of the rotor 3 in order to accommodate the three phase stator winding. The stator winding accommodated in the slots 35 of the stator core 32 is composed of a plurality of conductor segments. Each of the conductor segments has a pair of conductor members, and each of the slots 35 has a uniform number of conductor members (four conductor members according to this embodiment). The four conductor members in each of the slots 35 are aligned in the radial direction of the stator core 32 to form a lowermost layer, an inner middle layer, an outer middle layer and an outermost layer. The conductor segments are connected in a pre-established pattern to form the stator winding. The conductor segments form continuous coil ends one end of the stator core 32 and coil ends connected to the other end thereof. One of the driving members in one of the. grooves 35 is matched with one of the conductive members in another of the grooves 35 that separate with a separation of one pole from the previous one »In other words, one of the conductor members of each of the conductor segments is placed in a layer in one of the slots 35 and the other is placed in another layer in other of the slots 35 that is separated by a separation of one pole of the previous one. In this way, the conductor segments can be aligned at the ends of the coil and the spaces between them are secured. For example, the conductive member 331a of the conductive segment 331 is placed in the innermost layer in one of the slots 35, and the conductive member 331b of the same conductive segment 331 is placed in the outermost layer in the other of the slots 35 that are separated by a separation of one pole from the previous one. In the same way, the conductive member 332a of the conductive segment 331 is placed in the inner middle layer in one of the slots 35, and the conductive member 332b of the same segment 332 is placed in the outer middle layer in another of the slots 35 that it separates with a separation of one pole of the previous one in the sense of the hands of the clock. . Conductor segments 331, 332 have continuous U-turn portions, 331c, 332c, respectively. In this manner, at one end of the stator core 32, the continuous U-turn portion of the conductor members placed in the outermost layer and the innermost layer surrounds the continuous U-turn portion of the conducting members in the middle outer layer and inner middle layer. In other words, one of the two U-turn portions of the conductor segments placed in the same grooves surrounds the other of the U-turn portions at one end of the stator core 32. Each conductor segment having a pair of conductor members respectively positioned in the outer middle layer, forms an inner coil end, and each conductive segment having a pair of the conductor members respectively placed in the outermost layer and in the innermost layer, forms an outer coil end. On the other hand, the conducting member 332a of the conductive segment 332 placed in the inner middle layer in one of the grooves 35 is matched with the conductive segment 331a! of different conductor segment 331 placed in the innermost layer in another of the grooves 35 that separates with a pole in a clockwise direction thereof. In the same way, the conductive member 331bs of the conductive segment 331 placed in the outermost layer in one of the slots 35 also matches with the conductive member 332b of the conductive segment 332 placed in the outer middle layer in another of the slots 35 that it separates with a pole in the clockwise direction of the pole. These coupled conductor members are respectively welded together at the other end of the core of the stator 32. Therefore, the joining portions of the conductive members in the outermost layer and the conductive members in the outer middle layer and the portions of joining of the conducting members in the innermost layer and the conducting members in the inner middle layer are aligned in a circumference of the other end of the stator 32. The joining portions of the conductive members in the outermost layer and those in the middle layer outer and the joining portions of the conductor members in the innermost layer and those in the inner middle layer form coil ends of adjacent layers. In this manner, the rigged conductor members are arranged so that the members do not interfere with each other at the other end of the stator core 32. Each of the conductor members is a portion of the conductor segment of a certain shape having a rectangular cross section. As shown in Figure 3, one of the conducting members in the innermost layer and one of the conducting members in the outermost layer forms a large U-shaped conductive segment 331. One of the conducting members in the inner middle layer and one of the conducting members in the outer middle layer form a small U-shaped conductive segment 332. The large and small conductor segments are the base segments 33. The base segments are placed in the grooves in a pre-established rule to form a winding that rotates twice around the stator core 32. The shapes of the segments for the terminals are specific. winding and to connect the first loop and the second loop of the winding. Three specific segments are necessary in this modality. The first turn of the winding and the second turn of it are connected between the outermost layer and the outer middle layer between the innermost layer and the inner middle layer, thus forming specific coil ends. The X-phase winding of the three-phase windings is described with reference to Figures 4, 5 and 6. The conductor members placed in the outermost layer are indicated by one-point chain lines, and the conductor members placed in the The outer middle layer is indicated by dashed lines, the conductor members placed in the inner middle layer are indicated by solid lines, and the conductor members placed in the innermost layer are indicated by a two-point chain line. The first coil end group 31 a is shown on the upper side of the diagrams, and the second coil end group 31 b is shown on the lower side of the diagrams. The reference numbers aligned on the center line indicate the numbers in the slot. The reference numbers for the other phase windings are the same. As shown in Figure 4, each of the base segments 33 is inserted in each fourth slot from the "1" slot. In the second coil end group 31b, one end of the conductive member extending from the outer middle layer in one of the slots 35 is connected to the end of the conductive segment extending from the outermost layer of another of the slots 35. separated in the clockwise direction with a pole spacing from it. One end of the conductive member extending from the innermost layer of one of the grooves is also connected to the end of the conductive member extending from the inner middle layer in one of the grooves 35 spaced apart in a clockwise direction. a separation of a pole from it. In this way, a first winding 311 is formed, which has a coil wound in an imbricated form of two turns per pole.

In the same manner, as shown in Figure 5, the second winding 312 is formed "The windings 311 and 312 shown in Figures 4 and 5, are connected at the end 33m of the first winding 311 and the end 33n of the second winding 312, thereby forming winding 315 of four turns having each pole a four-turn coil. The conductor segment having the joining portion of the end 33ra of the first winding 311 and the end 33n of the second winding 312 is in a form different from the large base segment 311 and the small base segment 312. The phase X winding has three specific segments: the segment having the connecting portion of the end 33m of the first winding 331 and the end 33n and second winding 332, the segment having the terminal XI and the segment having the terminal X2. The number of specific segments can be reduced in the manner explained below. The first winding 311 shown in Figure 4 is formed by cutting one of the turning portions in U 332c of the small segments 332 of the annular winding wound on a preset rule that is inserted into the slot "1" and the slot "34".

In the same manner, the second winding 312 is formed by cutting one of the U-turn portions 331c of the large segments 331 of the annular winding wound on a preset rule that is inserted into the "1" slot and the "34" slot. . One of the cut portions of the U-turn portion 331c and one of the cut portions of the U-turn portion 332c are connected in series, and the other cutting portions of both the U-turn portion 331c and the portion 332c of U-turn are formed to the winding terminals, thereby forming winding 315. In this way, two annular windings are cut respectively and re-arranged to form a four-turn imbricate winding 315 with only three specific segments . The specific segments can be placed together in a space with a pole spacing of the first coil end group. In the same way, the phase winding Y and the phase winding Z are formed in those of the slots 35 which are 12C degrees at different angles from the others. The terminal XI of the phase X winding as well as the terminals Yl, Zl of the Y, Z phase windings are connected to the rectifier 5 and the terminals X2 and the other terminals Y2, Z2 (not shown) are connected together to a neutral point . As shown in Figure 7, the three-phase windings are connected at the star connection. The winding shown in Figure 6 has the terminal XI extending axially from the side of the first coil end group 31 a. Subsequently, a manufacturing process of the stator winding is described herein. The base segments 33 are positioned so that each of the U-turn portions of the large U-shaped segments encircle one of the U-shaped turning portions 332 of the small U-shaped segments 332 and are inserted. to the respective grooves of the stator core 32 from the same side thereof. The conductor members 331a of the large segments 331 are placed in the innermost layer of the grooves 35, the conductive members 332a of the small segments 332 are placed in the inner middle layer, the conductor members 331b of the large segments 331 are placed in the innermost layer in the grooves that separate with a pole at the clockwise direction from the previous grooves, and the conductive members 332b of the small segments 332 are placed in the outer middle layer in the grooves that they are spaced apart from a pole from the previous slots 35. As a result, the straight portions of the conductor members 331a, 332a, 332bs, 331b 'are aligned as shown in Figure 2. The conductor members 332b', 331b ' they mate with the conductor members of the large and small segments placed in the slot that separate with a pole from them. Later, in the second coil end group 31b, the conductive members in the outermost layer and the innermost layer are bent to separate from each other so that each of the joining portions 331d, 331e are tilted to cover 1.5 slots. The conductive members in the inner middle layer and the outer middle layer are also folded to close together so that each of the connecting portions 332d, 332e are tilted to cover 1.5 slots. The above steps are repeated for all the conductive segments 33 in the slots 35. In the second coil end group 31b, the joining portion 331e 'of the conductive member in the outermost layer and the connecting portion 332e of the middle layer outer, and also the connecting portion 332d to the conductive member in the inner middle layer and the connecting portion 331d 'of the conductor member in the innermost layer are welded by an ultrasonic wave welder or an arc welder, or are welded by electrical correction. The conductor segments are formed from U-shaped copper plates by a press machine. A set of the large segment and the small segment can be formed separately or together. The conductor segments can be formed from a flat type wire by bending. The shape of the U-turn portion can be changed to an arc shape. According to the structure described above, the conductor members in the same layer of the first group 31 a of the coil end and the second coil end group 31 b are inclined in the same direction. Accordingly, the conductor segments in the overlapped winding 315 of the same layer having four conductor members each slot can be provided without interference. The specific segments are limited to three each phase. All the joining portions can be brought together in the second coil end group 31b, and, therefore, the working time can be reduced. On the other hand, a plurality of joint portions may be distributed in an annular manner. Accordingly, sufficient distance can be maintained between the joint portions, and connection work such as welding can be made easy. For example, the placement of a welder or the like can be carried out easily, so that productivity can be increased. Because the large segments 33 encircle the small segments 332 to form double turn coils, both can be formed at the same time and inserted into grooves together, thereby providing high productivity. In addition, different specific segments of shape of the first coil end group 31a can be assembled in a pole separator to increase productivity. In this way, the conductor segments and the stator winding can be manufactured at high productivity and low cost.

[Second mode] More conductor members can be provided in each slot than four conductor members of the winding 315 of the first mode according to the following second to fourth modes. A plurality of windings 316, each of which has four conductor members in each slot can be placed in the winding 315 of the first embodiment in the radial direction to form a winding connected in series. The first coil end group 31a having 8 conductor members in each of the slots 35 is shown in Figure 8, and a winding diagram of the X-phase winding is shown in Figures 9 and 10. Figure 9 shows the conductor members placed in four layers: the first outer layer indicated by the chain lines of a point, the second layer by dashed lines, the third layer by solid lines and the fourth layer by two-point chain lines. Figure 10 shows the conductor members placed in the fifth to eighth layers: the fifth layer by chain lines of a point, the sixth layer indicated by broken lines, the seventh layer by solid lines and the eighth layer by chain lines of two points. The windings shown in Figures 9 and 10 are manufactured in the same manner as the first embodiment. The winding ends XXI and XX2 are connected by a conductor segment having a U-turn portion to form a winding connected in series. All the joining portions can be brought together in the second coil end group 31b to improve productivity. On the other hand, the joint portions can be distributed in the four-turn annular winding at equal intervals. In this way, the connection can be carried out as easily as the first mode. Although this embodiment requires five specific segments, these specific segments can be brought together in an area with one pole spacing of the first coil end group 31 a as in the first embodiment.

[Third mode] A plurality of winding 315 according to the first embodiment, having four conductor members in each of the slots 35, are surrounded by the winding 317. The conductor members placed in the two outer layers, the conductor members placed in the two inner layers and the two conducting members placed side by side combine to form a plurality of the same windings as the first embodiment, and are connected in series. Figure 11 is a schematic diagram showing a portion of the first coil end group 31 a having 8 conductor members in each groove. Figures 11 and 12 show a winding diagram, the X-phase winding. Figure 12 shows the conductor members placed in the third to sixth layers, and Figure 13 shows the conductor members placed in the first, second, seventh and eighth layers. layers. In Figure 12 the conductor members placed in the third layer from the outermost layer are indicated by the chain lines of a point, the conducting members in the fourth layer are indicated by broken lines, the conducting members in the fifth layer by lines solid and conducting members in the sixth layer by two-point chain lines. In Figure 13, the conductor members placed in the first layer which is the outermost layer, are indicated by chain lines of a point, the conducting members in the second layer by dashed lines, the conductor members in the seventh layer by lines solid and the same conductors in the eighth layer per two-point chain line. The winding shown in Figures 12 and 13 is manufactured in the same manner as in the first embodiment. The winding ends XX3 shown in Figure 12 and XX4 shown in Figure 13 are connected by a conductor segment having a U-turn portion to form a winding connected in series. In this way, all the joining portions can be assembled in the second coil end portion 31b., thus improving productivity. On the other hand, the joint portions can be distributed in the four-turn annular winding at equal intervals. The connection can be carried out as easily as the first mode. Although this embodiment requires five specific segments, these segments may be combined in an area with a pole spacing of the first coil end group 31 a as in the first or second embodiment.

[Fourth embodiment] Instead of the winding according to the first embodiment having four conductor members in each slot, a stator winding having six conductor members in each slot can be provided by two small segments 332, 333 U-shaped placed in the radial direction and the large U-shaped segment 331 surrounding the small segments 332, 333. Figure 14 is a schematic diagram showing a portion of the first coil end group 31a having conductor members respectively placed in the first from the outermost, second, third, fourth, fifth and sixth layers. The conductor members 331a, 331b 'extending from the first and sixth layers form a U-turn portion. The conductor members 332a, 332b' extending from the second and third layers and the conductor members 333a, 333b 'which are extending from the fourth and fifth layers form respective U-turn portions. Figures 15 and 16 show a winding diagram of the X-phase winding. In Figures 15 and 16, the conductor members in the first outermost layer are indicated by the chain lines of a point, the conductor members in the second layer indicated by the thin dashed lines, the conductor members in the third layer are indicated by the thin solid lines, the conductor members in the fourth layer are indicated by the two-point chain lines, the conductor members in the layer layer are indicated by the thick dashed lines, and the conductor members in the sixth layer are indicated by the thick solid lines. Each of the first winding 313 shown in Figure 15 and the second winding 314 shown in Figure 16 is an imbricate winding having three conductor members in each slot. The winding ends XX5 shown in Figure 15 and XX4 shown in Figure 16 are connected by a conductor segment having a U-turn portion to form a winding connected in series. In this way, the second coil end group 31b has joint portions placed regularly to improve productivity. On the other hand, the connecting portions can be distributed in the three-turn annular winding at equal intervals so that the connection can be carried out easily. Each phase winding has three specific segments: a specific segment having a junction portion between terminal XX5 of first winding 313 and terminal XX6 of second winding 314, a specific segment having terminal XI, and a specific segment having terminal X2. The specific segments can be brought together in an area of a pole spacing of the first coil end group 31 a as in the first or second embodiment.

[Other modes] The specific segment for connecting the first winding 311 and the second winding 322 can be used to connect the conductor member in the outermost layer of the conductor member in the inner middle layer instead of the specific segment for connecting the conductor member in the innermost layer and the conductive member in the inner middle layer according to the first embodiment. In this case, the conducting members in the innermost layer and in the outer middle layer extend as conducting wires. Rod-like segments can be inserted into the slots 35 and connected subsequently, instead of the small U-shaped segments 332 and the large U-shaped segments 331 having a U-shaped continuous portion 331c surrounding the segments. small 332. In this case, the winding can be formed by contacting each of the conductor members of both the first and the second coil end group. The joining portions in a coil end group are placed in the two annular layers, and the joining portions in the other coil end group are positioned so that the connecting portions of the conductive members in the inner middle layer in the grooves and the conductive members in the outer middle layer and in the grooves they are surrounded by the connecting portions of the conductor members in the outermost layer and the innermost layer. As a variant, the connecting portions of the conductive members of the outer middle layer and the conductive members of the inner middle layer in the coil end group are surrounded by the joining portions of the conductive members in the outermost layer and the outermost layer. interior, and the conducting members of the outermost layer and the outer middle layer as well as the conductive members of the innermost layer and the inner middle layer are connected by continuous wires. The extension wire can be placed on the side of the second coil end group instead of one of the first to fourth previous modes, which has the extension wires on the side of the first coil end group 31a. If the number of conductor members in each slot is 6 + 4N (N is a whole number) similar to the fourth mode, where six conductor members are inserted, the conductor members in the outermost layer and the innermost layer are connected by the U-turn portions. Therefore, the same winding structure can be provided by connecting the radially aligned conductor members in the layers by the U-turn portions. Even if the number of poles and slots is changed, it can be provided the same winding structure as the previous modes, each of which has 12 latching poles and 36 slots. For example, the number of slots can be doubled to have two windings of three phases to have combined output. A plurality of annular windings may be connected in series, in parallel or in combination thereof to provide the required output characteristics for a vehicle. Figure 17 shows a sample of one of the connection of a stator having 8 conductor members in each slot. In the second embodiment, the end 33m of the first winding 311 and the end 33n of the second winding 312 are formed from the rod-like segments so that the first winding 311 and the second winding 312 can be connected in parallel to each other. The parallel windings are connected in series with the windings having four conductor members in each slot to form one of the phase windings. If a pair of the same phase windings is formed for each phase, two star-connected windings and the respective rectifiers are available to have direct current energy as shown in Figure 18. In the previous mode, the stator core It has 36 slots. However, the same windings can be formed for the stator that has twice as many slots as the previous one, as shown in Figure 19. The mode shown in Figure 19 has windings that are 30 ° at different electrical angles than the others. phase windings and are connected in series between them. The 30 ° different windings are formed in the same way as the windings of the previous modes. The 30 ° different windings can be connected in star mode separately from the phase windings that are to be connected to a specific rectifier so that the direct current can be added to the direct current energy provided by the other windings of phase. The same structure can be applied to the stator that has three times as many slots as the previous one. A stator having a delta connection of the X, Y, Z windings can be provided in place of the connection of the previous star of the X, Y, Z windings. This star connection and the delta connection can be combined if They use two or more rectifiers. The number of specific segments is more than the number of annular windings such as winding 311, 312, 313 or 314 as described in the first to fourth modes. Each of the above annular windings has a plurality of turns and limited number of the specific segments. In the above embodiments, the conductor segments are formed from flat wires. Nevertheless, a round wire can be used if the straight portions of the conductor members 331a, 331b, 332a, 332b are formed to be flat. In the above description of the present invention, the invention has been described with reference to the specific embodiments thereof. However, it will be apparent that various changes and modifications can be made to the specific embodiments of the present invention without departing from the broader spirit and scope of the invention as set forth in the appended claims. Accordingly, the description of the present invention in this document will be considered in an illustrative sense, rather than a restrictive one.

It is noted that in relation to this date, the best method known by the applicant to carry out the present invention, is the conventional one for the manufacture of the objects to which it refers.

Having described the invention as above, the content of the following is claimed as property:

Claims (12)

1. A stator of an alternator for a vehicle including a stator core having a plurality of slots and a multi-phase stator winding, characterized in that: the stator winding comprises a plurality of conductive segments composed of conductive members connected together to forming a first end group of coil positioned at an axial end of the stator core, so that the first U-turn portions of the conductor segments are surrounded by the second U-turn portions of the conductor segments, and a second group of coil end placed on the other axial end of the stator core so that the ends of the conductor segments are connected to form the windings of turn.

2 . The stator core of an alternator for a vehicle according to claim 1, characterized in that: each of the conductor members is placed in one of the radially formed layers in each of the slots and, those conductor members of the first group of Coil end placed in these layers in one of the slots in one of the slots in an order from the outermost layer to the innermost layer is respectively connected to those conductor members of the first coil-end group placed in the layers in another of the slots in an order from the innermost layer to the outermost layer by turning portions.

3. The stator core of an alternator for a vehicle according to claim 1, characterized in that: those conductor members of the second coil end group extend in one of the opposite circumferential directions, alternatively to be connected to those conductor members which extend from the other of the slots in the joining portions thereof.

4. The stator of an alternator for a vehicle according to claim 1, characterized in that: the stator winding comprises a plurality of phase windings, and each of the phase windings comprises a plurality of base segments, specific segments having a shape different placed in a pole spacing of one of the coil end groups.

5. A stator of an alternator for a vehicle that includes a stator core with a plurality of slots and a stator winding composed of conductor members and inserted into the slots, wherein the conductor members are aligned in the slots to be placed in the layers inner and outer half and the innermost and outermost layers, an axial end of the stator core has a plurality of inner coil ends for connecting those conductor members connected in one of the middle layers, those of the conductive members placed in another of the middle layers. the middle layers, a certain separation therefrom and a plurality of outer coil ends to connect those conductor members placed in the innermost layer and those conductor members placed in the outermost layers or a certain distance therefrom, and the other axial end of the stator core has a plurality of coil ends of contiguous caps ua to connect those conductor members placed in one of the middle layer and those conductor members placed in an adjacent of the innermost and outermost layers to a certain separation thereof.

6. The stator core of an alternator according to claim 5, characterized in that: one of the axial ends of the stator core has a specific coil end for connecting a conductive member placed in the inner middle layer and a conductive member placed in the layer more exterior to a certain distance therefrom or to "connect a conductive member placed in the outer middle layer and a conductive member placed in the innermost layer at a certain distance therefrom.

7. The stator core of an alternator according to claim 6, characterized in that: a pair of unconnected conductor members placed adjacent to a specific coil end respectively placed in the outer middle layer and the innermost layer, placed in the middle layer Inside and the outermost layer forms a pair of terminals, one of which is connected to other windings and the other of which is an output terminal.

8. The stator core of an alternator according to claim 6, characterized in that: the stator winding comprises a small segment forming an inner coil end, a large segment forming an outer coil end, and a specific segment that forms a specific coil end, and the adjacent layer coil ends are formed by connecting a plurality of segment ends.

9. The stator core of an alternator in accordance with the rei indication 5, characterized in that: it further comprises other conductor members placed in alignment with the conductor members placed in the inner and outer middle layers and surrounded by the conductor members placed in the innermost layers and more exterior.

10. The stator core of an alternator according to claim 5, characterized in that: another winding is added with the same conductors thereof aligned in the radial direction so that the windings are connected to form a phase winding.

11. The stator core of an alternator according to claim 5, characterized in that: another winding is added to encircle the winding, so that the windings are connected to form a winding.

12. The stator core of an alternator according to claim 5, characterized in that: the stator winding further comprises a plurality of windings that are placed in the stator core to be different in phase angle in the other windings.