WO2016185510A1 - 車両用交流発電機 - Google Patents
車両用交流発電機 Download PDFInfo
- Publication number
- WO2016185510A1 WO2016185510A1 PCT/JP2015/063992 JP2015063992W WO2016185510A1 WO 2016185510 A1 WO2016185510 A1 WO 2016185510A1 JP 2015063992 W JP2015063992 W JP 2015063992W WO 2016185510 A1 WO2016185510 A1 WO 2016185510A1
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- WO
- WIPO (PCT)
- Prior art keywords
- housing
- rectifier
- insert
- conductor
- protective cover
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
- H02K11/049—Rectifiers associated with stationary parts, e.g. stator cores
- H02K11/05—Rectifiers associated with casings, enclosures or brackets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/16—Synchronous generators
- H02K19/36—Structural association of synchronous generators with auxiliary electric devices influencing the characteristic of the generator or controlling the generator, e.g. with impedances or switches
- H02K19/365—Structural association of synchronous generators with auxiliary electric devices influencing the characteristic of the generator or controlling the generator, e.g. with impedances or switches with a voltage regulator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
Definitions
- the present invention relates to a vehicular AC generator that is driven by a vehicle engine to generate electric power.
- Example 6 of Japanese Patent Application Laid-Open No. 07-322556 discloses an automotive alternator including a duct cover configured in the same manner as the rear cover.
- the vehicle alternator disclosed in Patent Document 1 has a radial output terminal positioned on the opposite side across the shaft core of the generator as an extension part of an axial output terminal to which a harness for supplying current from the vehicle is attached.
- the insert covered conductor is attached to the outside of the duct cover and fixed to the bracket together with the duct cover.
- Patent Document 2 a protrusion for receiving a circumferential force generated when a current supply harness from a vehicle is fastened and fixed to an output terminal with a nut is provided on the harness.
- a rear cover provided integrally as a detent is disclosed.
- in this patent document 2 in order to respond to the force applied to the protrusion part comprised around the through-hole provided in the bottom wall part of the rear cover manufactured thinly with resin, it is provided in the cover side wall part.
- a configuration is disclosed in which the engaging opening and the engaging claw of the rectifying circuit mold terminal are fitted to ensure the strength.
- the vehicular AC generator disclosed in Patent Document 1 can easily arrange output terminals at various parts by simply attaching and detaching the covering conductor without changing the specifications of the duct cover.
- the covered conductor is fixed to the bracket by a through bolt and a tightening nut together with the duct cover, there is a problem that the accommodation space of the rear cover portion in the duct cover is narrowed.
- the through-bolt part protrudes to the outer diameter side. That is, although the sharing of parts and the degree of freedom of arrangement of output terminals are ensured, the efficient cooling of the heat-generating parts is reduced and the vehicle mounting property is deteriorated.
- This invention was made in order to solve the said subject, and it aims at obtaining the alternating current generator for vehicles which implement
- An automotive alternator is fixed to a rotating shaft rotatably supported by a housing, and is wound around a rotor, a stator core, and the stator core disposed in the housing. And a stator supported by the housing so as to surround the rotor, and disposed on the outer side on one side in the axial direction of the housing.
- a voltage regulator that adjusts to a specified value, and a protective cover made of resin that is manufactured in a bottomed cylindrical shape having a bottom portion and a cylindrical peripheral wall portion, and is attached to the housing so as to cover the rectifier and the voltage regulator And be prepared
- An attachment member that is inserted through a through hole formed in the bottom portion of the protective cover and fixed to a portion on one axial side of the housing, and extends from the straightening device to the outer side on the one axial side of the protective cover.
- the output cover is supported by the output terminal and the mounting member, and is provided on the back surface of the protective cover, and is provided with an insert-coated conductor formed of a separate member from the protective cover.
- an automotive alternator that can share parts without reducing the degree of freedom of wiring connection with a vehicle, reduces manufacturing costs, and does not reduce the cooling performance of the generator. Obtainable. Other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention with reference to the drawings.
- FIG. 1 is a view of an automotive alternator according to Embodiment 1 of the present invention as viewed from the rear side
- FIG. 2 is a partial sectional view of FIG. 1 and 2
- an automotive alternator 1 includes a housing 4 composed of a substantially bowl-shaped aluminum front bracket 2 and a rear bracket 3, and a housing 4 that is rotatable via a pair of bearings 5.
- a supported rotating shaft 6, a pulley 7 fixed to the end of the rotating shaft 6 extending to the front side of the housing 4, and a rotor 8 fixed to the rotating shaft 6 and disposed inside the housing 4. It has.
- the rotor 8 includes a field winding 9 that generates a magnetic flux by supplying an exciting current, and a pole core 10 that is provided so as to cover the field winding 9 and that forms a magnetic pole by the magnetic flux.
- the vehicle alternator 1 includes fans 11 a and 11 b fixed to both end surfaces of the rotor 8 in the axial direction, and a stator 12 fixed to the housing 4 so as to surround the rotor 8. .
- the stator 12 is wound around the cylindrical stator core 13 and the stator core 13, and a stator winding 14 in which an alternating current is generated by a change in magnetic flux from the field winding 9 as the rotor 8 rotates.
- the stator core 13 is sandwiched between the front bracket 2 and the rear bracket 3 from both sides in the axial direction so as to surround the rotor 8.
- the rotor 8 has 12 poles, and the number of slots formed in the stator core 13 is 72. That is, slots are formed at a rate of two per phase per pole.
- the stator winding 14 is composed of two sets of three-phase AC windings that are Y-connected.
- a pair of slip rings 15 that are fixed to an extending portion of a rotating shaft 6 that extends to the rear side of the housing 4 and supplies a current to the rotor 8;
- a rectifier 16 is provided which is manufactured in a substantially C shape and rectifies an electromotive force generated in the stator winding 14.
- the rectifying device 16 is arranged on the outer peripheral side of the slip ring 15 in a fan shape centered on the rotating shaft 6 on a plane orthogonal to the axis of the rotating shaft 6.
- the vehicle alternator 1 is housed in a brush holder (not shown) disposed on the outer peripheral side of the pair of slip rings 15 and between the substantially C-shaped tips of the rectifying device 16, and each slip A pair of brushes (not shown) that slide on the ring 15 and a voltage regulator 17 that is attached to the brush holder and adjusts the magnitude of the voltage value of the AC electromotive force generated in the stator winding 14 to a specified value.
- a connector (not shown) arranged on the rear side of the rear bracket 3 for inputting / outputting signals between the voltage regulator 17 and the like and an external device (not shown), a rectifier 16, a brush holder, a voltage A protective cover 18 made of an insulating resin is mounted on the rear bracket 3 so as to cover the adjuster 17.
- intake ports 2a and 3a are formed at portions facing the end face in the axial direction of the rotor 8. Further, the exhaust ports 2 b and 3 b are formed at the outer peripheral edge portions of the front bracket 2 and the rear bracket 3 so as to be located radially outward of the coil ends 14 a and 14 b of the stator winding 14.
- the rear bearing 5 is fixed to a bearing mounting portion 19 provided on the rear bracket 3 via a folder 20.
- FIG. 3 shows a perspective view of the rectifier 16.
- a first heat sink 21, a circuit board 22, and a second heat sink 23 are laminated with a predetermined gap.
- the rectifying device 16 has the thickness direction of the first heat sink 21, that is, the stacking direction of the first heat sink 21, the circuit board 22 and the second heat sink 23 as the axial direction, and the second heat sink 23 faces the end surface of the rear bracket 3.
- the rectifying device 16 is fixed to the rear bracket 3 by fastening a fixing bolt 25 passed through the housing connecting portion 24 to the rear bracket 3.
- a fixing bolt 25 is passed through the housing connecting portion 24 from the first heat sink 21 side through an insulating member (not shown).
- the rectifying device 16 has a substantially arc shape centered on the rotating shaft 6 with the surface of the first heat sink 21 positioned on a plane orthogonal to the axis of the rotating shaft 6 on the rear side of the rear bracket 3. Be placed. Further, the lead wires (not shown) of the two sets of three-phase AC windings constituting the stator winding 14 are respectively drawn out from the rear bracket 3 to the rear side to be connected to the stator winding connecting portion (not shown). And is welded to the other end of a circuit board insert conductor (not shown).
- An output terminal bolt 26 serving as an output terminal is inserted into a through hole at one end in the circumferential direction of the first heat sink 21, and a mounting bolt 27 serving as a mounting member is integrally extended to the tip of the fixing bolt 25 at the other end. To do.
- the protective cover 18 is attached to the rear bracket 3 so as to cover the rectifying device 16, the brush holder, and the voltage regulator 17 from the rear side in the axial direction, as shown in FIG.
- the protective cover 18 is made of an insulating resin and is formed into a bottomed cylindrical shape including a cylindrical portion 28 and a bottom portion 29 that closes one side opening of the cylindrical portion 28. In the region of the bottom portion 29 facing the rectifying device 16, A plurality of suction ports 30 are formed.
- a through hole 18a through which the output terminal bolt 26 passes is formed at a portion of the bottom 29 of the protective cover 18 facing the output terminal bolt 26, and the fixing bolt 25 is attached to a portion facing the fixing bolt 25 of the rectifying device 16.
- a through-hole (not shown) through which the bolt 27 passes is formed, and the insert-covered conductor 31 formed of a separate member from the protective cover 18 is suspended from both bolts by a nut or the like, outside the bottom 29 of the protective cover 18. Is provided.
- the insert-coated conductor 31 is formed by integrating the coated conductor output terminal portion 32 and the insert conductor 33 and then molding the molded portion 34.
- the insert conductor 33 is exposed from the mold portion 34 at a portion of the terminal bolt through hole 33a through which the output terminal bolt 26 penetrates, and via the relay conductor 33b that is in plane contact with the insert conductor 33, that is, the insert conductor 33 and the insert conductor 33. Is electrically connected to the first heat sink 21 via the relay conductor 33b connected in a surface contact state.
- the output terminal bolt 26 is attached to the first heat sink 21 and is electrically connected to the cathode of each positive-side rectifying element 37 (see FIG. 3) via the first heat sink 21 to be rectified.
- the output terminal of the device 16 is configured.
- the covered conductor output terminal portion 32 is electrically connected via the insert conductor 33 of the insert covered conductor 31 attached to the output terminal of the rectifier 16 to constitute the output terminal of the vehicle alternator 1.
- the anode of each negative-side rectifying element 38 (see FIG. 3) is grounded via the second heat sink 23 and the rear bracket 3.
- stator winding 14 is connected to the other end of the circuit board insert conductor at a stator winding connecting portion (not shown), and the positive-side rectifying element 37 and the negative-side rectifying element 38 of the three-phase diode bridge Connected to each connection point. Further, the field winding 9 is connected to the voltage regulator 17 via the slip ring 15 and the brush.
- the rotational torque of the engine (not shown) is transmitted to the rotating shaft 6 via the belt (not shown) and the pulley 7, and the rotor 8 is rotated. Therefore, a rotating magnetic field is applied to the stator winding 14 of the stator 12, and an electromotive force is generated in the stator winding 14.
- This AC electromotive force is rectified by the rectifier 16 and supplied to the vehicle-mounted load or the battery. Thereby, the vehicle-mounted load is driven and the battery is charged.
- the fans 11a and 11b rotate in conjunction with the rotation of the rotor 8.
- cooling air flows into the front bracket 2 from the air inlet 2 a and flows in the axial direction to the vicinity of the rotor 8. Therefore, the cooling air is bent in the centrifugal direction by the fan 11a and is discharged to the outside of the front bracket 2 from the exhaust port 2b.
- the cooling air flows into the protective cover 18 from the suction port 30, flows into the rear bracket 3 from the intake port 3 a, and flows in the axial direction to the vicinity of the rotor 8. Therefore, the cooling air is bent in the centrifugal direction by the fan 11b and discharged from the exhaust port 3b to the outside of the rear bracket 3.
- FIG. 5 is a schematic diagram for explaining the flow of cooling air in the vicinity of the rectifier 16 in the automotive alternator 1.
- negative pressure is generated in the region between the fan blade and the rotating shaft 6 by the rotation of the fan 11 b.
- the suction port 30 located on the upstream side of the first inner diameter side fins 52 disposed on the inner diameter side of the first rectifying element holding part 51.
- a flow 53 of cooling air flowing into the protective cover 18 is generated.
- the cooling air that has flowed into the protective cover 18 flows in the axial direction between the first inner diameter side fins 52 and absorbs the heat of the positive electrode side rectifying element 37 held by the first rectifying element holding part 51. Since the inner diameter side end portion of the second heat sink 23 is located radially outside the outer diameter side end portion of the bearing mounting portion 19, a space 54 is formed between the bearing mounting portion 19 and the second heat sink 23.
- Part of the cooling air flowing between the first inner diameter side fins 52 flows between the second inner diameter side fins 56 disposed on the inner diameter side of the second rectifying element holding portion 55 in the axial direction, and the second rectification
- the heat of the negative electrode side rectifying element 38 held in the element holding part 55 is absorbed.
- the cooling air flowing between the second inner diameter side fins 56 flows in the axial direction toward the negative pressure portion 50.
- the remaining portion of the cooling air flowing between the first inner diameter side fins 52 flows in the axial direction toward the negative pressure portion 50 through the space 54 and absorbs the heat of the bearing 5 held by the bearing mounting portion 19.
- the first inner diameter side fin 52 and the second inner diameter side fin 56 are configured such that the protruding end of the first inner diameter side fin 52 is positioned radially inward from the protruding end of the second inner diameter side fin 56. Has been.
- the negative pressure part 50 is formed, so that the cooling that flows into the protective cover 18 from the suction port 57 located on the upstream side of the outer diameter side of the first rectifying element holding part 51.
- An air flow 58 is generated. Part of the cooling air that has flowed into the protective cover 18 flows in the axial direction on the outer diameter side surface of the first rectifying element holding part 51, and the positive rectifying element 37 held by the first rectifying element holding part 51 Absorbs heat.
- the circuit board 22 is disposed so as to be separated from the first rectifying element holding part 51 and the second rectifying element holding part 55 in the axial direction. Accordingly, the radial ventilation path 61 that communicates the outer diameter side and the inner diameter side of the rectifying device 16 in the radial direction is provided between the circuit board 22 and the first rectifying element holding portion 51 and between the circuit board 22 and the second rectifying element. It is formed between the holding part 55. As a result, a part of the cooling air flowing into the inside of the protective cover 18 from the suction port 57 branches, flows in the radial direction air passage 61 radially inward, and flows between the first inner diameter side fins 52. To join.
- the output terminal bolt 26 of the rectifier 16 extending to the outside on the one axial side of the protective cover 18 and the bottom 29 of the protective cover 18.
- a separate insert-covered conductor 31 that is supported by a mounting bolt 27 that is inserted through the through-hole 18a formed in the housing and fixed to a portion of the housing 4 in the axial direction is directly connected to the vehicle harness 35. Since the terminal is configured, it is not necessary to make the protective cover 18 covering the heat generating component small, and the cooling performance is not deteriorated. In addition, the degree of freedom of position of the output terminal to which the vehicle harness 35 is connected can be increased without creating a new protective cover 18. Therefore, unlike the insert-coated conductor disclosed in Patent Document 1, it is possible to substantially secure the suction port of the rectifying device 16 without largely covering the back surface of the protective cover, and to exhibit the effect of not reducing the cooling performance.
- the protruding end of the first inner diameter side fin 52 is located radially inward from the protruding end of the second inner diameter side fin 56, and the first inner diameter side fin 52 On the projecting end side of 52, there is no overlap between the first inner diameter side fin 52 and the second inner diameter side fin 56 in the axial direction, and pressure loss when cooling air flows on the inner diameter side of the rectifier 16 is reduced. Further, when viewed in the axial direction, the second inner diameter side fin 56 is overlapped with the first inner diameter side fin 52 in the same projecting direction, that is, the second inner diameter side fin 56 does not protrude from the first inner diameter side fin 52.
- the pressure loss when the cooling air flows on the inner diameter side of the rectifier 16 is further reduced. Therefore, the flow rate of the cooling air flowing through the inner diameter side of the rectifier 16 is increased, and the positive rectifier element 37 can be effectively cooled. Further, since a part of the cooling air that flows between the first inner diameter side fins 52 does not flow between the second inner diameter side fins 56, the cooling air is suppressed in the temperature of the bearing mounting portion 19 by suppressing the temperature rise. The bearing 5 can be effectively cooled. Regardless of the arrangement of the separate insert-covered conductor 31 described above, the rectifying device 16 is configured with a high cooling property, so that the vehicle alternator 1 can ensure the cooling property.
- the suction port 57 opens to the vicinity of the second outer diameter side fin 59 in the portion of the cylindrical portion 28, in other words, opens a region where the bottom portion 29 of the protective cover 18 and the peripheral wall portion intersect with each other. Since there is no overlapping in the axial direction on the protruding end side of the radial fin 59, the pressure loss when the cooling air flows on the outer diameter side of the rectifier 16 is reduced. Since the cooling air flowing on the outer diameter side of the rectifier 16 is directly supplied to the second outer diameter side fin 59, the negative electrode side rectifying element 38 can be effectively cooled.
- a radial ventilation path 61 is formed between the first rectifying element holding part 51 and the circuit board 22 and between the second rectifying element holding part 55 and the circuit board 22. Therefore, a part of the cooling air that does not rise in temperature and flows into the protective cover 18 from the suction port 57 is branched and flows into the inner diameter side of the rectifying device 16 through the radial ventilation path 61.
- the cooling air that has flowed into the inner diameter side of the rectifying device 16 through the radial direction air passage 61 joins the cooling air that has circulated between the first inner diameter side fins 52 without increasing the temperature. As a result, the temperature of the cooling air flowing between the first inner diameter side fins 52 decreases.
- FIG. 7 is a schematic diagram of the insert covered conductor 31A of the vehicle alternator according to the second embodiment.
- the main body portion 70 is formed by molding the covered conductor output terminal portion 32A and the insert conductor 33A.
- the annular part 71 includes at least one annularly arranged vehicle harness anti-rotation function part, and
- FIG. 7 shows the vehicle harness anti-rotation function part having two recesses 36a around it.
- Reference numeral 34A denotes a mold part of an insert conductor (not shown). Other configurations are the same as those in the first embodiment, and a description thereof is omitted.
- the large-sized main body portion 70 can be used as a common component, and it is possible to cope with the vehicle by preparing only a large number of the annular portions 71 that can be relatively small. A vehicular AC generator can be obtained.
- the annular portion 71 can be mounted simply by fitting into the main body portion 70, and there is no problem in terms of design.
- FIG. 8 is a partial view of an automotive alternator according to Embodiment 3 as viewed from the rear side.
- the mounting hole formed in the insert-coated conductor 31B is configured as a long hole.
- Other configurations are the same as those in the first embodiment including the coated conductor output terminal portion 32, the insert conductor 33, and the concave portion 36 that forms the anti-rotation function portion, and the description thereof is omitted.
- the through hole through which the mounting bolt 27 of the fixing bolt 25 of the rectifying device 16 penetrates with the long hole 34b, it is possible to cope with a partially dimensional difference product of the rectifying device 16.
- the parts disposed on the rear side of the rear bracket 3 and covered with the protective cover 18 are basically designed around the shaft, and among them, the position of the fixing bolt portion for fixing in the rectifying device 16 is Some have different diameters and have a common through portion for the output terminal bolt 26.
- Such a plurality of rectifiers 16 can be handled as common parts, and an increase in cost can be avoided.
- the rotor 8 has 12 poles and the stator core has 72 slots.
- the number of poles and the number of slots are not limited thereto.
- the case where the number of slots per phase per pole is 2 has been described, but the number of slots per phase per pole is not limited to 2.
- the positive rectifier 37 is the first rectifier mounted on the first heat sink 21, and the negative rectifier 38 is the second rectifier mounted on the second heat sink 23.
- the positive rectifier 37 may be a second rectifier mounted on the second heat sink 23, and the negative rectifier 38 may be a first rectifier mounted on the first heat sink 21.
- Embodiments 1 to 3 have been described above, the present invention is not limited to this, and these configurations may be appropriately combined or partly included in the configuration without departing from the spirit of the present invention. It is possible to add a modification or to omit a part of the configuration.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Synchronous Machinery (AREA)
- Motor Or Generator Frames (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
前記保護カバーの前記底部に形成された貫通穴を挿通して前記ハウジングの軸方向一側の部位に固着された取付部材と、前記整流装置から前記保護カバーの軸方向一側の外側に延出する出力端子と、前記出力端子と前記取付部材とで支持されると共に、前記保護カバーの背面に設けられ、前記保護カバーと別部材で構成されたインサート被覆導体を備えたものである。
この発明の上記以外の目的、特徴、観点および効果は、図面を参照する以下のこの発明の詳細な説明から、さらに明らかになるであろう。
図1は、この発明の実施の形態1による車両用交流発電機をリア側から見た図であり、図2は、図1の一部断面図を示している。
図1および図2において、車両用交流発電機1は、それぞれ略椀形状のアルミニウム製のフロントブラケット2とリアブラケット3からなるハウジング4と、このハウジング4に一対の軸受5を介して回転自在に支持された回転軸6と、ハウジング4のフロント側に延出する回転軸6の端部に固着されたプーリ7と、回転軸6に固定されてハウジング4の内部に配設された回転子8を備えている。回転子8は、励磁電流の供給により磁束を発生する界磁巻線9と、界磁巻線9を覆うように設けられ、その磁束によって磁極が形成されるポールコア10を備えている。
まず、電流がブラシ(図示せず)およびスリップリング15を介して回転子8の界磁巻線9に供給され、磁束が発生する。この磁束により、N極とS極がポールコア10の外周部に周方向に交互に形成される。
図5は、車両用交流発電機1における整流装置16の付近における冷却空気の流れを説明する模式図である。図5において、まず、ファン11bの回転により、ファンブレードと回転軸6との間の領域に負圧が発生する。整流装置16の内径側では、負圧部50が形成されることで、第1整流素子保持部51の内径側に配設された第1内径側フィン52の上流側に位置する吸い込み口30から保護カバー18の内部に流入する冷却空気の流れ53が生じる。保護カバー18の内部に流入した冷却空気は、第1内径側フィン52の間を軸方向に流れ、第1整流素子保持部51に保持されている正極側整流素子37の熱を吸収する。第2ヒートシンク23の内径側端部が、軸受取付部19の外径側端部より径方向外側に位置しているので、軸受取付部19と第2ヒートシンク23との間に空間54が形成される。
次に、この発明の実施の形態2による車両用交流発電機について説明する。図7は、実施の形態2による車両用交流発電機のインサート被覆導体31Aの概略図で、被覆導体出力端子部32Aとインサート導体33Aとがモールド成形されてなる本体部70と、本体部70の被覆導体出力端子部32Aの周りに勘着される環状部71とから構成されている。環状部71は、少なくとも一つの環状配置の車両ハーネス廻り止め機能部を備え、図7では、車両ハーネス廻り止め機能部として、凹部36aが周囲に2か所構成されるものを示している。また、符号34Aはインサート導体(図示せず)のモールド部を示している。なお、その他の構成については、実施の形態1と同様であり、説明を省略する。
次に、この発明の実施の形態3による車両用交流発電機について説明する。図8は、実施の形態3による車両用交流発電機をリア側から見た部分図である。実施の形態3による車両用交流発電機1Bは、インサート被覆導体31Bに形成される取付孔が長穴で構成されている。他の構成は、被覆導体出力端子部32、インサート導体33、廻り止め機能部をなす凹部36を含めて実施の形態1と同じであり、説明を省略する。
また、前記各実施の形態では、毎極毎相当たりのスロット数が2の場合について説明しているが、毎極毎相当たりのスロット数が2に限定されない。
また、前記各実施の形態では、正極側整流素子37を第1ヒートシンク21に実装される第1整流素子とし、負極側整流素子38を第2ヒートシンク23に実装される第2整流素子としているが、正極側整流素子37を第2ヒートシンク23に実装される第2整流素子とし、負極側整流素子38を第1ヒートシンク21に実装される第1整流素子としてもよい。
Claims (6)
- ハウジングに回転可能に支持された回転軸に固着されると共に、前記ハウジング内に配設された回転子と、
固定子鉄心と前記固定子鉄心に巻装された固定子巻線を有し、前記回転子を囲繞するように前記ハウジングに支持された固定子と、
前記ハウジングの軸方向一側の外側に配設されると共に、前記ハウジングに固着されて前記固定子巻線に発生する交流の起電力を整流する整流装置と、
前記ハウジングの軸方向一側の外側に配設されると共に、前記ハウジングに固着されて前記起電力の電圧値の大きさを規定値に調整する電圧調整器と、
底部および筒形の周壁部を有する有底筒状に作製され、前記整流装置および前記電圧調整器を覆うように前記ハウジングに装着された樹脂製の保護カバーと、
を備えた車両用回転電機において、
前記保護カバーの前記底部に形成された貫通穴を挿通して前記ハウジングの軸方向一側の部位に固着された取付部材と、
前記整流装置から前記保護カバーの軸方向一側の外側に延出する出力端子と、
前記出力端子と前記取付部材とで支持されると共に、前記保護カバーの背面に設けられ、前記保護カバーと別部材で構成されたインサート被覆導体と、を備えたことを特徴とする車両用交流発電機。 - 前記インサート被覆導体のインサート導体は、このインサート導体と平面接触する中継導体を介して前記整流装置のヒートシンクに電気的に接続されることを特徴とする請求項1に記載の車両用交流発電機。
- 前記保護カバーの前記底部に形成され、前記整流装置を覆うように前記ハウジングの軸方向の一側に配設された冷却空気の吸い込み口と、
前記回転子の軸方向の端面に対向する前記ハウジングの部位に形成された吸気口と、
前記固定子巻線に対向する前記ハウジングの部位に形成された排気口と、を備え、
前記回転子に設けられたファンの回転により、前記吸い込み口と前記吸気口から前記ハウジングの内部に流入し、前記ファンにより遠心方向に曲げられて前記排気口から排出される前記冷却空気の流通路を形成すると共に、
前記整流装置は、
前記ハウジングの軸方向と直交する平面上に配設された平板状の第1整流素子保持部を有する第1ヒートシンクと、
前記第1整流素子保持部に保持された複数の第1整流素子と、
前記第1整流素子保持部に対して前記ハウジング側に離間して、かつ前記ハウジングの軸方向と直交する平面上に配設された平板状の第2整流素子保持部を有する第2ヒートシンクと、
前記第2整流素子保持部に保持された複数の第2整流素子と、
前記複数の第1整流素子と、前記複数の第2整流素子とを接続してブリッジ回路を構成するサーキットボードと、を備え、
前記保護カバーの前記底部と前記筒形の周壁部とが交わる領域を開口としたことを特徴とする請求項1または2に記載の車両用交流発電機。 - 前記インサート被覆導体は、被覆導体出力端子部とインサート導体とがモールド成形されると共に、前記被覆導体出力端子部の周りには、少なくとも一つの車両ハーネス廻り止め機能部を備えたことを特徴とする請求項1から3の何れか一項に記載の車両用交流発電機。
- 前記インサート被覆導体は、被覆導体出力端子部とインサート導体とがモールド成形された本体部と、前記本体部の被覆導体出力端子部の周りに勘着される部材とから構成され、前記部材は、少なくとも一つの車両ハーネス廻り止め機能部を備えたことを特徴とする請求項1から3の何れか一項に記載の車両用交流発電機。
- 前記インサート被覆導体の、前記取付部材が貫通する孔を長孔で構成したことを特徴とする請求項1から5の何れか一項に記載の車両用交流発電機。
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