CN101316054B - AC generator for vehicle - Google Patents
AC generator for vehicle Download PDFInfo
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- CN101316054B CN101316054B CN2007101092782A CN200710109278A CN101316054B CN 101316054 B CN101316054 B CN 101316054B CN 2007101092782 A CN2007101092782 A CN 2007101092782A CN 200710109278 A CN200710109278 A CN 200710109278A CN 101316054 B CN101316054 B CN 101316054B
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- 238000004804 winding Methods 0.000 claims abstract description 144
- 238000001816 cooling Methods 0.000 claims description 51
- 238000009423 ventilation Methods 0.000 claims description 21
- 230000005284 excitation Effects 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 11
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- 238000004519 manufacturing process Methods 0.000 description 11
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- 238000005452 bending Methods 0.000 description 7
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- 238000006731 degradation reaction Methods 0.000 description 6
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- 238000009413 insulation Methods 0.000 description 5
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
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- 238000005516 engineering process Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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Abstract
In a stator core, the radial length (ht) and the width (bt) of a rack part meets that the ratio of bt and ht is less than 0.4 and more than 0.15. A stator winding is provided with a plurality of windings which are respectively winded on a trough group consisting of the troughs of the stator core with specific trough numbers. Each winding is formed by winding the conductive wires on the trough group by equal parts at the left side and the right side, wherein, the conductive wires extend out of the two ends of the trough and respectively inserted into the troughs with the distance of specific trough number and at two sides of the circumferential direction by equal parts at the left side and the right side of the circumference. Furthermore, the trough receiving parts of the conductive wires are received in the troughs by multi-layer in a state that the long axis direction with flat sections and the circumferential direction are consistent in the radial direction and arranged as a line.
Description
Technical field
The present invention relates to a kind of vehicle-mounted dlternator, improve the vehicle-mounted dlternator of the cooling of stator thereby relate in particular to a kind of ventilation road that makes cooling air pass through the cooling air that the tooth-strip part by the coil-end group of stator winding and stator core forms.
Background technology
Figure 16 is a cutaway view of representing vehicle-mounted dlternator in the past, Figure 17 is the stereogram of the stator that uses in the vehicle-mounted dlternator of representing in the past, Figure 18 is the ideograph that the manufacture method of stator core in the past is described, Figure 19 is a vertical view of representing stator core in the past.
Among Figure 16 and Figure 17, vehicle-mounted dlternator in the past comprises: the shell 3 that is made of the front rack 1 and the tail-bracket 2 of aluminum; The axle 6 that be arranged in this shell 3, at one end portion is fixed with belt pulley 4; Be fixed on this Landon type rotor 7 on 6; Be fixed in the cooling fan 5 at the axial both ends of this rotor 7; Be fixed on stator 8 on the shell 3 with the state that surrounds rotor 7; Be fixed in axle the other end of 6 and to the collector ring 9 of rotor 7 supplying electric currents; The a pair of brush body 10 that slides on the surface of collector ring 9; Take in the brush holder 11 of this brush body 10; The AC rectification that is electrically connected with stator 8 and stator 8 is produced is galvanic rectifier 12; Be installed on the heat abstractor 17 that is embedded in brush holder 11, in order to the regulating relay 18 of the size of adjusting the alternating voltage that stator 8 produces.
Rotor 7 comprises: circulation has electric current to produce the excitation winding 13 of magnetic flux; And cover this excitation winding 13 and form a pair of pole core 20,21 of magnetic pole by this magnetic flux.And, a pair of pole core 20,21 is fabricated from iron, and respectively outside circumference along circumferentially with etc. angular separation is outstanding is provided with outermost diametric plane shape and is the roughly claw-like magnetic pole 22,23 of trapezoidal shape, make these claw-like magnetic poles 22,23 relatively be fixed in axle 6 with the state of engagement.
In addition, the number of magnetic poles of rotor 7 is 12, is formed with 36 grooves 33 in the stator core 15.That is to say that the groove number of every extremely every phase is 1.And stator winding 16 forms the 3 cross streams windings that 3 mutually wavy windings exchanged tie lines (for example Y tie lines) gained.
At this, the manufacture method of stator core 15 is described with reference to Figure 18.
At first, elongated magnetic steel plate 30 is supplied with to press working machine (not shown), to form tooth-strip part 30a and base portion 30b.Then, this magnetic steel plate 30 is supplied with to device for producing iron core (not shown).Therefore, pin 34 meshes with the gap 30c that is made of tooth-strip part 30a and base portion 30b as illustrated in fig. 18, and reeling magnetic steel plate 30 limit curved edges overlapping is helical form.Then, after magnetic steel plate 30 is laminated to specific thickness, cut off.The peripheral part of the magnetic steel plate 30 to coiling like this after overlapping welds, to obtain stator core shown in Figure 19 15.At this, the tooth-strip part 30a and the base portion 30b of the magnetic steel plate 30 after overlapping of reeling are overlapping along stacked direction respectively.
In the stator core 15 of making thus, as shown in figure 19, comprising: base portion 32 cylindraceous; Inner peripheral surface from base portion 32 extends the tooth-strip part 31 that is provided with to the axle center respectively; The groove 33 that is divided into by base portion 32 and adjacent tooth-strip part 31.And tooth-strip part 31 is with the inner peripheral surface of isogonism spacing arrangement in base portion 32.
Thus in the vehicle-mounted dlternator in the past of Gou Chenging, from storage battery (not shown) by brush body 10, collector ring 9 to excitation winding 13 supplying electric currents to produce magnetic flux.Utilize this magnetic flux that the claw-like magnetic pole 22 of pole core 20 is magnetized to the N utmost point, the claw-like magnetic pole 23 of pole core 21 is magnetized to the S utmost point.
On the other hand, utilize motor driven belt pulley 4, make rotor 7 follow axle 6 rotations.Rotation by this rotor 7 applies rotating magnetic field to stator core 15, makes stator winding 16 produce electromotive force.Then, the electromotive force of the interchange that stator winding 16 is produced utilizes rectifier 12 rectifications to be direct current, and the size of utilizing regulating relay 18 to regulate its output voltages, so that storage battery is charged.
At this, excitation winding 13, stator winding 16, rectifier 12 and regulating relay 18 be heating all the time in generating, in the vehicle-mounted dlternator of output-current rating 100A grade, on the higher point of rotation of temperature, has the caloric value of 60W, 500W, 120W, 6W respectively.
Therefore, for making the heat cooling that produces by generating, on the axial end of front rack 1 and tail-bracket 2, be equipped with suction hole 1a, 2a, and on the radial side of front rack 1 and tail-bracket 2, relatively be equipped with steam vent 1b, 2b with coil-end group 16f, the 16r of stator winding 16.
Thus, rotation along with rotor 7, cooling blower 5 is driven in rotation, and forms extraneous air is sucked in the shell 3 and flow to rotor 7 sides vertically, utilizes cooling blower 5 to centrifugal direction bending, the group of crosscut coil-end then 16f, 16r and from steam vent 1b, the 2b cooling air stream to outside exhaust from suction hole 1a, 2a.In addition, form from the front side by flowing to the cooling air stream of rear side in the rotor 7 because of the front side of rotor 7 and the pressure differential of rear side.
Therefore, the heat that stator winding 16 produces is released into the cooling air from coil- end group 16f, 16r, rises with the temperature that suppresses stator 8.In addition, the heat that rectifier 12 and regulating relay 18 produce is released in the cooling air by heat abstractor 12a, 17, rises with the temperature that suppresses rectifier 12 and regulating relay 18.And the heat that excitation winding 13 produces is released in the cooling air that is flowing in the rotor 7, rises with the temperature that suppresses rotor 7.
In the vehicle-mounted dlternator in the past that so constitutes, it is very important that the heat that suppresses maximum heat generating components and be stator winding 16 rises.The cooling air that is formed by cooling blower 5 and rotor 7 is crossed coil-end group 16f, the 16r of stator winding 16 from interior all effluents radially, thereby the heat that stator winding 16 produces is released into the cooling air from coil- end group 16f, 16r, rises with the temperature that suppresses stator 8.
At this, in the actual conditions, under the poorest service conditions, can reach 90 ℃ ambient temperature.In addition, the softening temperature with the varnish of stator core 15 and stator winding 16 combinations that contains in the groove 33 that is immersed in stator core 15 is 230 ℃.Therefore, considering because of ambient temperature rises causes the exciting current reduction that output is reduced, if the temperature rising value during with 90 ℃ of ambient temperatures is controlled at below 140 ℃, even then also can avoid the temperature of stator 8 to exceed the softening temperature of varnish under the poorest service conditions.And, 170 ℃ of the temperature rising values when 140 ℃ of temperature rising values during 90 ℃ of ambient temperatures are equivalent to 20 ℃ of ambient temperatures.
And, if reach the softening temperature of varnish, then can promote thermal degradation, and make the combination of stator core 15 and stator winding 16 lax.The lax meeting of the combination of stator core 15 and stator winding 16 causes the friction of 15 of the lead 29 of stator winding 16 and stator cores, thereby the insulation coverlay of damage wires 29 makes electrical insulating property worsen.
Therefore, the applicant is conceived to form the ventilation road in the gap between the end face of coil-end group 16f, the 16r of stator winding 16 and stator core 15, finds to stipulate that the ratio (bt/ht) of width bt and radical length ht of the tooth-strip part 31 on this ventilation road has influence to the cooling of stator winding 16.
Yet, so far, also the ratio (bt/ht) of the width bt of tooth-strip part 31 and radical length ht was not carried out any consideration.And, in the vehicle-mounted dlternator in the past, for example as shown in figure 20, adopt the stator core 15 (bt=4.8mm, ht=11.4mm) of bt/ht ≈ 0.42.This vehicle-mounted dlternator being generated electricity with full load and exporting under the stable status, the saturation temperature of stator 8 to be measured, the temperature rising value of being calculated by the experimental situation temperature (20 ℃) of saturation temperature is 173 ℃.Thus, in the vehicle-mounted dlternator in the past, under the poorest service conditions, the temperature of stator 8 can exceed the softening temperature of varnish, causes thermal degradation aggravation and electrical insulating property to worsen.
Summary of the invention
For solving the problems of the technologies described above, the object of the present invention is to provide the ratio (bt/ht) of a kind of width bt to tooth-strip part and radical length ht and also can make below the softening temperature of stator temperature at varnish under the poorest service conditions, can improve thermal degradation endurance, prevent the deterioration of electrical insulating property and make the thermal diffusivity of stator winding good, improve the vehicle-mounted dlternator of cooling property even suitably set with the thermal diffusivity that improves stator winding.
In the vehicle-mounted dlternator of the present invention, comprising: rotatably support axle in the enclosure; Be fixed in the rotor on the described axle, this rotor have circulation have electric current with the excitation winding that produces magnetic flux and along circumferentially be provided in the outer circumferential side of this excitation winding, by the magnetized a plurality of claw-like magnetic poles of the magnetic flux that this excitation winding produced; Stator, this stator upper edge circumferential array are formed with many grooves that extend vertically, have described rotor is enclosed in internally to be supported on the stator core cylindraceous on the described shell and to be wound on stator winding in this stator core; Be fixed in the cooling fan of the axial end of described rotor.Described stator core is folded by the magnetic steel flaggy and is constituted, and has: base portion cylindraceous; Extend a plurality of tooth-strip parts that are provided with to the axle center from this base portion; Many described slot parts that are divided into by described base portion and adjacent described tooth-strip part, the ventilation channel that rotation by described rotor makes cooling air pass through from interior all sides is radially formed by the coil-end group of described stator winding and the described tooth-strip part of described stator core, and the radical length ht of described tooth-strip part and width bt satisfy 0.15＜bt/ht＜0.4.Described stator winding has a plurality of windings, these a plurality of windings are wound in respectively on the groove group that described groove constituted by the regulation groove number of described stator core, described each winding by constituting on the described groove group being wound in with waiting branch about lead, wherein, lead is extended out from the two ends of described groove, in the circumferential left and right sides, both sides five equilibrium also inserts the described groove of described regulation groove number apart of circumferential both sides respectively, described lead has and is configured as section and is groove incorporating section in the described groove of being accommodated in of flat, and described groove incorporating section is accommodated in the described groove with being the long axis direction of flat and the state multilayer that circumferentially as one man radially is arranged as 1 row with the cross section.
Utilize the present invention, the ventilation channel that rotation by rotor makes cooling air pass through from interior all sides is radially formed by the coil-end group of stator winding and the tooth-strip part of stator core, and the radical length ht of tooth-strip part and width bt satisfy 0.15＜bt/ht＜0.4, the temperature that therefore can suppress stator rises, improve thermal degradation endurance, prevent the deterioration of electrical insulating property.
In addition, wait branch ground to reel about each winding of stator winding, but so spread loop end group's the area that bears cooling air so that coil-end group's thermal diffusivity is good.
And the groove incorporating section is the long axis direction of flat and is accommodated in the groove with circumferentially as one man radially being arranged as the 1 state multilayer that is listed as with the cross section, therefore can improve the factor that takes up space, to realize the generator of high output.
Description of drawings
Fig. 1 is the cutaway view of the vehicle-mounted dlternator of expression embodiment of the present invention 1.
Fig. 2 is the stereogram of stator of the vehicle-mounted dlternator of expression embodiment of the present invention 1.
Fig. 3 is the partial sectional view of the groove receiving state of the stator winding in the stator of vehicle-mounted dlternator of expression embodiment of the present invention 1.
Fig. 4 is the major part end view of stator of the vehicle-mounted dlternator of expression embodiment of the present invention 1.
Fig. 5 is the process chart of the operation of the manufacturing star winding element in the manufacture method of stator of vehicle-mounted dlternator of explanation embodiment of the present invention 1.
Fig. 6 is the stereogram that waits the fraction winding element in the stator of vehicle-mounted dlternator of expression embodiment of the present invention 1.
Fig. 7 is the major part enlarged drawing that waits the fraction winding element in the stator of vehicle-mounted dlternator of expression embodiment of the present invention 1.
Fig. 8 is that the fraction winding element that will wait in the manufacture method of stator of vehicle-mounted dlternator of explanation embodiment of the present invention 1 is installed to the process chart of the operation in the stator core.
Fig. 9 is the figure of relation of the temperature rising value of the bt/ht of stator core in the vehicle-mounted dlternator of expression embodiment of the present invention 1 and stator.
Figure 10 is the stereogram of stator of the vehicle-mounted dlternator of expression embodiment of the present invention 2.
Figure 11 is the major part end view of stator of the vehicle-mounted dlternator of expression embodiment of the present invention 2.
Figure 12 is the partial sectional view of the groove receiving state of the stator winding in the stator of vehicle-mounted dlternator of expression embodiment of the present invention 2.
Figure 13 is the stereogram of the single-phase winding in the stator of vehicle-mounted dlternator of expression embodiment of the present invention 2.
Figure 14 is the enlarged drawing of the major part of the single-phase winding in the stator of vehicle-mounted dlternator of expression embodiment of the present invention 2.
Figure 15 is the cutaway view of the vehicle-mounted dlternator of expression embodiment of the present invention 3.
Figure 16 is a cutaway view of representing vehicle-mounted dlternator in the past.
Figure 17 is the stereogram of the stator that uses in the vehicle-mounted dlternator of representing in the past.
Figure 18 is the ideograph that the manufacture method of stator core in the past is described.
Figure 19 is a vertical view of representing stator core in the past.
Figure 20 is a major part amplification plan view of representing stator core in the past.
Embodiment
Below, with reference to the accompanying drawings embodiments of the present invention are described.
Execution mode 1
Fig. 1 is the cutaway view of the vehicle-mounted dlternator of expression embodiment of the present invention 1, Fig. 2 is the stereogram of stator of the vehicle-mounted dlternator of expression embodiment of the present invention 1, Fig. 3 is the partial sectional view of the groove receiving state of the stator winding in the stator of vehicle-mounted dlternator of expression embodiment of the present invention 1, Fig. 4 is the major part end view of stator of the vehicle-mounted dlternator of expression embodiment of the present invention 1, and Fig. 5 is the process chart of the operation of the manufacturing star winding element in the manufacture method of stator of vehicle-mounted dlternator of explanation embodiment of the present invention 1.Fig. 6 and Fig. 7 are respectively the stereogram and the major part enlarged drawings that wait the fraction winding element in the stator of vehicle-mounted dlternator of expression embodiment of the present invention 1, and Fig. 8 illustrates that the fraction winding element that will wait in the manufacture method of stator of vehicle-mounted dlternator of embodiment of the present invention 1 is installed to the process chart of the operation in the stator core.In addition, in each figure, to the same or considerable part mark prosign of Figure 16 to vehicle-mounted dlternator in the past shown in Figure 20, and omit explanation.
Among Fig. 1 to Fig. 4, stator 40 is made of stator core 41 cylindraceous and the stator winding 45 that is wound in the stator core 41.This stator 40 with the state clamping that between the inner peripheral surface of the outer peripheral face of claw-like magnetic pole 22,23 and stator core 41, forms uniform air gap, be embedded in 2 of front rack 1 and tail-brackets.
Next, the structure to stator 40 is specifically described.
Stator winding 45 constitutes the 3 cross streams windings that 3 phase windings 47 exchanged tie lines (for example Y tie lines) gained, and this 3 phase winding 47 constitutes by lead 46 being hummock be wound on 3 grooves 44.
Each winding 47 constitutes the wavy winding with lead 46 coiling regulation number of turns gained, as shown in Figure 5, each winding 47 form by 12 groove incorporating section 47a that arrange with 3 slot pitches (3P) and make half end of adjacent groove incorporating section 47a alternately link and make in axial both sides each other linking part 47b that remaining half end alternately links in axial both sides each other constitutes be wavy figure etc. sub-winding, this winding 47 is wound in the stator core 41 with the states that groove incorporating section 47a is accommodated in 3 grooves 44.And the linking part 47b that the end of adjacent groove incorporating section 47a is connected to each other extends along circumferential in the axial outside of stator core 41, to constitute coil-end.At this moment, half of extended linking part 47b extended and inserted in the adjacent groove 44 of a circumferential side along a circumferential side from a groove 44, remaining half extend and insert in the adjacent groove 44 of circumferential opposite side along circumferential opposite side.
And, will for the groove 44 that 3 windings 47 insert radially overlapping (1P) along 1 slot pitch that circumferentially staggers mutually be that 3 layers of ground are wound in the stator core 41.The coil-end of 3 phase windings 47 (linking part 47b) constitutes coil-end group 45f, the 45r of stator winding 45.
The stator 40 that adopts said structure as shown in Figure 4, the ventilation channel 100 that is formed by the tooth-strip part 42 of coil- end group 45f, 45r and stator core 41 is along circumferential array.And steam vent 1b, 2b and ventilation hole 100 are formed on the side radially of front rack 1 and tail-bracket 2 accordingly.In addition, other structure is identical with the vehicle-mounted dlternator shown in Figure 16 to 20.
Next, with reference to Fig. 5 to Fig. 8 the manufacture method of stator 40 is described.
At first, shown in Fig. 5 (a), will reel 5 circles in the form of a ring making the 1st winding element 48A by 1 lead 46 constituting of the rounded copper wire material in cross section that is coated with the insulation coverlay, and then 5 circles of reeling in the form of a ring are to make the 2nd winding element 48B.
Next, shown in Fig. 5 (b), with the 1st and the 2nd winding element 48A, 48B bending, making the 1st and the 2nd star winding element 49A, the 49B with star graphic, this star graphic is to form by the end of the groove incorporating section 47a of the adjacent linearity linking part 49b by コ word shape is alternately linked at interior all sides and outer circumferential side.Among the 1st and the 2nd star winding element 49A, the 49B, restraint along circumferentially being arranged as 12 with predetermined distance by the bundle that 5 groove incorporating section 49a form.
Then, turn back in position at the lead 46 that links the 1st and the 2nd star winding element 49A, 49B, shown in Fig. 5 (c), even the peak portion that makes two star graphics and paddy portion linking part 49b overlappingly radially relatively overlap the 1st and the 2nd star winding element 49A, 49B, to make star winding element 49.
Next, the groove incorporating section 49a with each bundle star winding element 49 is placed in the Press forming machine (not shown).At this moment, each groove incorporating section 49a that restraints star winding element 49 is overlapping along compression aspect is 1 row.Then, utilize pressing means (not shown) that the groove incorporating section 49a of all bundles is pressurizeed quickly.Thus, making groove incorporating section 49a is the rectangle cross section from the circular cross-section plastic deformation.And each groove incorporating section 49a is roughly the same cross sectional shape.
Then, as Figure 6 and Figure 7, make star winding element 49 be configured as the cylindric five equilibrium winding element 50 of making.These sub-winding unit 50 are and hummock are wound with 10 circle leads 46.And, be parallel to axial state along circumferentially the bundle that is formed by 10 groove incorporating section 50a (being equivalent to plastic deformation is the groove incorporating section 49a in rectangle cross section) being arranged with length direction with 3 spacing arrangement.In addition, 5 groove incorporating section 50a that respectively restraint groove incorporating section 50a are alternately linked at axial two ends by linking part 50b (being equivalent to linking part 49b).Then, the remaining 5 groove incorporating section 50a that respectively restraint groove incorporating section 50a are alternately linked at axial two ends by linking part 50b.In addition, the linking part 50b of 5 groove incorporating section 50a of binding is relative vertically.
Next, with the axial one distolateral linking part 50b that waits branch winding element 50 to the radially inner side bending.Then, as shown in Figure 8, will wait branch winding element 50 from axially being mounted to stator core 41.At this moment, move in the peristome of groove 44 vertically near the position the groove incorporating section 50a of the linking part 50b of radially inner side bending, thereby groove incorporating section 50a is drawn in the groove 44.Then, after drawing in groove incorporating section 50a in the groove 44 fully, make linking part 50b reply the state that extends vertically, thereby 1 five equilibrium winding element 50 is mounted to stator core 41 to the radially inner side bending.
Then, branch winding elements 50 such as the next one similarly are mounted to stator core 41 with the state of the groove 44 of the insertion of staggering.Then, will also have a five equilibrium winding element 50 similarly to be mounted to stator core 41, thereby obtain stator 40 shown in Figure 2.At this, the five equilibrium winding element 50 that is installed on stator core 41 becomes each winding 47 of stator winding 45.And the groove incorporating section 50a of five equilibrium winding element 50 and linking part 50b are equivalent to the groove incorporating section 47a and the linking part 47b of winding 47.
If use present embodiment 1, the ratio (bt/ht) of the width bt of the tooth-strip part 42 of stator core 41 and radical length ht is 0.35, therefore compares with the stator in the past 8 of bt/ht=0.42, can form narrower ventilation road 100.Therefore, cooling fan 5 makes cooling air by narrow ventilation road 100, so the speed of cooling air increases, the heat that stator winding 45 is distributed is released in the cooling air effectively, thereby the temperature that suppresses stator 40 rises.
In addition, rise, therefore can improve output owing to can suppress the temperature of stator 40.And, even under the poorest operating condition, also can prevent the softening thermal degradation that causes, and stop because of the lead 46 of stator winding 45 and the insulation coverlay of the friction damage wires 46 of 41 of stator cores because of varnish 52, thus the raising electrical insulating property.
In addition, because cooling fan 5 is fixed in the axial end of rotor 7, therefore, can utilizes cooling fan 5 that cooling air is forced to send into ventilation road 100, thereby improve coil-end group's 45f, the cooling of 45r.
In addition, because steam vent 1b, 2b and the 100 corresponding settings of ventilation road, therefore the cooling air of circulation in ventilation road 100 can promptly be discharged from steam vent 1b, 2b.Therefore, can reduce draft loss, and improve coil-end group's 45f, the cooling of 45r, and reduce the wind noise.
In addition, owing to stator core 41 is embedded on front rack 1 and the tail-bracket 2, so the heat that stator winding 45 distributes can be conveyed to before and after carriage 1,2 by stator core 41.Then, being conveyed to before and after, the heat of carriage 1,2 is released in the cooling air that flows through steam vent 1b, 2b.Therefore, can promote the temperature of stator 40 to reduce.
In addition, the winding 47 of each phase that constitutes stator winding 45 is by waiting sub-winding to constitute, and therefore is divided into each half from the groove 44 extended linking part 47b (coil-end) of each winding 47 to about circumferential both sides.Therefore, because the bundle of linking part 47b is attenuated, therefore can reduce bending stress radially overlapping because of the bundle of linking part 47b, that the phase mutual interference acts on linking part 47b.Thus, even bending stress concentrates on the boundary portion of groove incorporating section 47a and linking part 47b, the insulation coverlay of this boundary portion also is difficult for impaired, thereby prevents 46 accidents that are short-circuited of lead.In addition, because the overlapping edge radially of the bundle of linking part 47b is circumferentially disperseed, therefore can reduce internal face concavo-convex on ventilation road 100.Thus, can reduce the wind noise that the pressure oscillation because of 5 in coil-end group's 45f, 45r and rotor 7 or coil-end group's 45f, 45r and fan produces.
In the time will waiting branch winding element 50 to be mounted to stator core 41, when formation is installed on the linking part 50b of five equilibrium winding element 50 of stator core 41 and when vehicle causes vibration to vehicle-mounted dlternator, phase mutual friction between linking part 47b, 50b.At this,, therefore can prevent to improve insulating properties because of phase mutual friction between linking part 47b, 50b causes that the insulation coverlay is impaired because linking part 47b, 50b form circular cross-section.
In addition, groove incorporating section 47a is accommodated in the groove 44 towards the state that circumferentially radially is arranged as 1 row with the long axis direction in rectangle cross section, therefore can improve the factor that takes up space, to realize the generator of high output.In addition, because the groove incorporating section 47a that is accommodated in the groove 44 is close to mutually, therefore can further improve the factor that takes up space.
The linking part 47b of interior all sides is easy to cool off by fan 5, and the linking part 47b of outer circumferential side is difficult for cooling off by fan 5.Yet,, therefore between the 47a of groove incorporating section, be easy to carry out heat conduction, thereby make the temperature of groove incorporating section 47a become even because groove incorporating section 47a is close to mutually.Thus, can prevent that stator winding 45 from rising in the excessive temperature of part.
In addition, outermost groove incorporating section 47a closely contacts across the bottom surface of insulator 51 with groove 44, therefore the heat of stator winding 45 can be conveyed to stator core 41 effectively, thereby the excessive temperature that prevents stator winding 45 rises.
At this, the width bt of stator core 41 and the ratio (bt/ht) of radical length ht are discussed with the relation of the temperature rising value of stator.Therefore, the vehicle-mounted dlternator that is equiped with the stator that bt/ht was carried out change is generated electricity with full load and exporting under the stable status, saturation temperature to stator is measured, and the temperature rising value of being calculated by the experimental situation temperature (20 ℃) of saturation temperature as shown in Figure 9.In addition, among Fig. 9, transverse axis is represented bt/ht, the temperature rising value that the longitudinal axis is represented to be calculated by the experimental situation temperature of stator (20 ℃) (℃).In addition, the saturation temperature of stator be with 3000,3500,4000,4500 and 5000r/min when running each saturation temperature of stator is measured, with its maximum as saturation temperature.
In Fig. 9, it is the curve of flex point that the temperature rising value of stator is expressed as with bt/ht=0.27.And in the scope of 0.15＜bt/ht＜0.27, along with reducing of bt/ht, the temperature rising value of stator increases lentamente, and in the scope of bt/ht＜0.15, along with reducing of bt/ht, the temperature rising value of stator increases sharp.On the other hand, in the scope of 0.27＜bt/ht＜0.4, along with the increase of bt/ht, the temperature rising value of stator increases lentamente, and in the scope of 0.4＜bt/ht, along with the increase of bt/ht, the temperature rising value of stator increases sharp.And in the scope of 0.15＜bt/ht＜0.4, the temperature rising value of stator is controlled at below 170 ℃.
Can infer thus, if bt/ht is less than 0.27, the road 100 that then ventilates is narrower, speed by the cooling air in the ventilation road 100 accelerates, thereby the coil-end group's on promotion formation ventilation road 100 internal face is to the heat transmission of cooling air, if bt/ht＜0.15, the road 100 that then ventilates is too narrow, air quantity by the cooling air in the ventilation road 100 becomes seldom, causes the speed of cooling air on the low side, causes the deterioration of cooling property.In addition, if bt/ht is greater than 0.27, the draft loss on road 100 of then ventilating subtracts greatly, make the air quantity of cooling air increase, thereby the speed of cooling air is accelerated, thereby the coil-end group's on promotion formation ventilation road 100 internal face is to the heat transmission of cooling air, if 0.4＜bt/ht, the ventilation section on road 100 of then ventilating is long-pending wide, causes the speed of cooling air on the low side, causes the deterioration of cooling property.
Therefore, because the softening temperature of varnish 52 is 230 ℃, considering because of ambient temperature rises causes the exciting current reduction that output is reduced, if the temperature rising value during with 90 ℃ of ambient temperatures is controlled at below 140 ℃, even then also can avoid the temperature of stator to exceed the softening temperature of varnish 52 under the poorest service conditions.And, 170 ℃ of the temperature rising values when 140 ℃ of temperature rising values during 90 ℃ of ambient temperatures are equivalent to 20 ℃ of ambient temperatures.Thus, consider the softening of varnish 52, preferably be set at 0.15＜bt/ht＜0.4 as can be seen from Figure 9.Thus, can realize a kind ofly improving thermal degradation endurance and preventing the lax vehicle-mounted dlternator that makes the deterioration of electrical insulating property because of the combination of stator core 41 and stator winding 45.
In addition, as can be seen from Figure 9, in the scope of 0.22≤bt/ht≤0.32, the temperature rising value of stator is stabilized in 166.3 ℃～165 ℃.Therefore, by being set at 0.22≤bt/ht≤0.32, can be stably suppress the temperature of stator lower, therefore can realize the vehicle-mounted dlternator of high output.
In addition, in the above-mentioned execution mode 1, the groove incorporating section forms the rectangle cross section, yet both can make the cross sectional shape of groove incorporating section be flat, for example can form the section shape that the two ends with relative parallel long limit link with circular arc again.
In addition, in the above-mentioned execution mode 1, utilize 1 lead 46 to make the 1st and the 2nd winding element 48A, 48B, yet the 1st and the 2nd winding element 48A, 48B also can be made respectively by 1 lead.
In addition, in the above-mentioned execution mode 1, insulator 51 is installed in groove 44, yet also can omits insulator 51.
Figure 10 is the stereogram of stator of the vehicle-mounted dlternator of expression embodiment of the present invention 2, Figure 11 is the major part end view of stator of the vehicle-mounted dlternator of expression embodiment of the present invention 2, Figure 12 is the partial sectional view of the groove receiving state of the stator winding in the stator of vehicle-mounted dlternator of expression embodiment of the present invention 2, Figure 13 is the stereogram of the single-phase winding in the stator of vehicle-mounted dlternator of expression embodiment of the present invention 2, and Figure 14 is the enlarged drawing of the major part of the single-phase winding in the stator of vehicle-mounted dlternator of expression embodiment of the present invention 2.
Among Figure 10 to Figure 14, stator 40A is made of stator core 41A and the stator winding 45A that is wound on this stator core 41A.The stator core 41 of stator core 41A and above-mentioned execution mode 1 is similarly made, and extends each the tooth-strip part 42A that is provided with from its base portion 43A and forms bt/ht=0.25 (bt=2.5mm, ht=10.0mm).In addition, be formed with 72 groove 44A on the stator core 41A.At this, because the number of magnetic poles of rotor 7 is 12, therefore the groove number of every extremely every phase is 2.
Stator winding 45A constitutes 23 cross streams windings that per 3 of 6 phase winding 47A exchanged mutually tie lines (for example Y tie lines) gained, and this 6 phase winding 47A constitutes by lead 46A being hummock be wound on 6 groove 44A.
Each winding 47A constitutes the reel wavy winding of regulation number of turns gained with lead 46A, form by 12 groove incorporating section 47a that arrange with 6 slot pitches and half end of adjacent groove incorporating section 47a is alternately linked in axial both sides each other and linking part 47b that remaining half end is alternately linked in axial both sides each other constitutes be wavy figure etc. sub-winding.
The state that winding 47A is accommodated in respectively in the groove of arranging with 6 slot pitches 44 with groove incorporating section 47a is wound on the stator core 41A.And 6 winding 47A are radially overlapping (1P) along 1 slot pitch that circumferentially staggers mutually to be that 6 layers of ground are wound on the stator core 41A.The coil-end of 6 winding 47A (linking part 47b) constitutes coil-end group 45f, the 45r of stator winding 45A.
And as shown in figure 12, groove incorporating section 47a is arranged as 6 layers of ground with the long axis direction in flat cross section with the state that circumferentially as one man radially is arranged as 1 row and is accommodated in the groove 44A that insulator 51 is installed.And wedge 53 is embedded in the opening of groove 44A, makes groove incorporating section 47a be pushed into the bottom surface side of groove 44A.Thus, make groove incorporating section 47a closely contact mutually, and outermost groove incorporating section 47a is closely contacted across the bottom surface of insulator 51 with groove 44A.And varnish 52 contains and is immersed in the groove 44A, and stator core 41A and stator winding 45A is affixed.
Adopt among the stator 40A of said structure, the ventilation channel 100A that is formed by the tooth-strip part 42A of coil- end group 45f, 45r and stator core 41A is also along circumferential array.In addition, other structure is identical with above-mentioned execution mode 1.
Use present embodiment 2, because the tooth-strip part 42A of stator core 41A forms bt/ht=0.25, therefore compare with the above-mentioned execution mode 1 that forms bt/ht=0.35, but the thermal diffusivity of intensifier coil end group 45f, 45r, thus the temperature that suppresses stator 40A rises.
In addition, because groove 44A forms with the ratio of 2 of every extremely every phases, therefore the quantity on the ventilation road 100 that forms between the end face of coil- end group 45f, 45r and stator core 41A is 2 times of above-mentioned execution mode 1, thereby can further suppress the temperature rising of stator 40A, and reduces the wind noise.
In addition, in the present embodiment 2, the channel opening that is formed with winding 47A is by the 47c of portion, therefore will wait the branch winding element when axially being mounted to stator core 41A, the channel opening of the boundary portion of groove incorporating section 47a and linking part 47b moves in the peristome of groove 44 vertically by the 47c of portion, thereby groove incorporating section 47a is drawn in the groove 44A.Therefore, the conductor 46A in the time of can avoiding that winding 47A is mounted to stator core 41A contacts with stator core 41A's, the damage of receiving of the coverlay that prevents to insulate.
Use present embodiment 3, because the axial Zone Full of the blade 5a of cooling fan 5 is roughly overlapping diametrically with coil- end group 45f, 45r, therefore can utilize cooling fan 5 to supply with cooling air to coil- end group 45f, 45r reliably, thereby improve the cooling of coil-end group 45f, 45r.And, because the ejection side of cooling fan 5 is covered by coil- end group 45f, 45r, therefore can produce the effect of blocking the noise diffusion, thereby reduce the wind noise.
In addition, in the respective embodiments described above, be that 1,2 situation is illustrated, yet the groove number that applies the present invention to every extremely every phase is under the situation more than 3, also can obtain same effect to the groove number of every extremely every phase.
In addition, in the respective embodiments described above, be illustrated by the situation that claw-like magnetic pole 22,23 mulched grounds are installed on the pole core 20,21 and with the claw-like magnetic pole vehicle-mounted dlternator that together rotates, exciting current is supplied with to excitation winding by brush body 10 being applied to excitation winding 13, yet apply the present invention to excitation winding is fixed in carriage, utilizes air gap under the situation of the vehicle-mounted dlternator of the brushless type of stator supply rotating magnetic field, also can obtain same effect.
In addition, in the respective embodiments described above, elongated magnetic steel plate is wound as helical form to make stator core, yet the manufacture method of stator core is not limited to the method, the magnetic steel flaggy of the band shape of regulation sheet number is folded to make the laminate core of cuboid, this laminate core is bent into circular, the end face that is bent into circular laminate core is docked each other and welds to make stator core.
In addition, in the respective embodiments described above, the cross section of groove incorporating section is rectangular, and the rounded lead in linking part use cross section, yet also can use all rectangular lead in all cross sections certainly.
Claims (2)
1. a vehicle-mounted dlternator is characterized in that, comprising:
Rotatably support axle in the enclosure; Be fixed in the rotor on the described axle, this rotor have circulation have electric current with the excitation winding that produces magnetic flux and along circumferentially be provided in the outer circumferential side of this excitation winding, by the magnetized a plurality of claw-like magnetic poles of the magnetic flux that this excitation winding produced; Stator, this stator upper edge circumferential array are formed with many grooves that extend vertically, have described rotor is enclosed in inner form to be supported on the stator core cylindraceous on the described shell and to be wound on stator winding in this stator core; Be fixed in the cooling fan of the axial end of described rotor,
Described stator core is folded by the magnetic steel flaggy and is constituted, and has: base portion cylindraceous; Extend a plurality of tooth-strip parts that are provided with to the axle center from this base portion; Many described slot parts that are divided into by described base portion and adjacent described tooth-strip part,
The ventilation channel that rotation by described rotor makes cooling air pass through from interior all sides is radially formed by the coil-end group of described stator winding and the described tooth-strip part of described stator core,
The radical length ht of described tooth-strip part and width bt satisfy 0.15＜bt/ht＜0.4,
Described stator winding has a plurality of windings, and these a plurality of windings are wound in respectively on the groove group that described groove constituted by the regulation groove number of described stator core,
Described each winding is by constituting on the described groove group waiting branch ground to be wound in about lead, wherein, make lead extend out from the two ends of described groove, to the circumferential left and right sides, both sides five equilibrium and insert respectively in the described groove of described regulation groove number apart of circumferential both sides,
Described lead has the groove incorporating section that is configured as in the described groove of being accommodated in of flat section,
Described groove incorporating section is accommodated in the described groove with circumferential with the long axis direction in flat cross section with as one man radially being arranged as the 1 state multilayer that is listed as.
2. vehicle-mounted dlternator as claimed in claim 1 is characterized in that, in described groove, the described groove incorporating section that radially is arranged as 1 row is in contact with one another, and outermost described groove incorporating section contacts with the bottom surface of described groove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101092782A CN101316054B (en) | 2007-05-28 | 2007-05-28 | AC generator for vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101092782A CN101316054B (en) | 2007-05-28 | 2007-05-28 | AC generator for vehicle |
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| CN101316054A CN101316054A (en) | 2008-12-03 |
| CN101316054B true CN101316054B (en) | 2011-05-18 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5299515B2 (en) * | 2010-10-14 | 2013-09-25 | トヨタ自動車株式会社 | motor |
| CN103262391B (en) * | 2010-12-14 | 2016-04-06 | 三菱电机株式会社 | Rotary electric machine for vehicles and the manufacture method of stator wherein used |
| JP5647962B2 (en) * | 2011-09-27 | 2015-01-07 | 東芝三菱電機産業システム株式会社 | Rotating electric machine |
| CN103457413A (en) * | 2013-09-25 | 2013-12-18 | 无锡金阳电机有限公司 | Electric generator |
| CN104753301A (en) * | 2015-04-10 | 2015-07-01 | 锦州汉拿电机有限公司 | High-frequency transformer based brushless claw-pole generator |
| CN111224491A (en) * | 2018-11-26 | 2020-06-02 | 广东美的环境电器制造有限公司 | Insulating frame strip of motor stator, motor stator and motor |
| WO2021197505A1 (en) * | 2020-03-30 | 2021-10-07 | 苏州阿福机器人有限公司 | Cooling flow channel structure in motor slot |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1202028A (en) * | 1997-05-26 | 1998-12-16 | 株式会社电装 | Alternator for automotive vehicle |
| JP2005312097A (en) * | 2004-04-16 | 2005-11-04 | Toshiba Corp | Motor |
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2007
- 2007-05-28 CN CN2007101092782A patent/CN101316054B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1202028A (en) * | 1997-05-26 | 1998-12-16 | 株式会社电装 | Alternator for automotive vehicle |
| JP2005312097A (en) * | 2004-04-16 | 2005-11-04 | Toshiba Corp | Motor |
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