WO2013077264A1 - 回転電機 - Google Patents
回転電機 Download PDFInfo
- Publication number
- WO2013077264A1 WO2013077264A1 PCT/JP2012/079777 JP2012079777W WO2013077264A1 WO 2013077264 A1 WO2013077264 A1 WO 2013077264A1 JP 2012079777 W JP2012079777 W JP 2012079777W WO 2013077264 A1 WO2013077264 A1 WO 2013077264A1
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- WIPO (PCT)
- Prior art keywords
- wall
- slit
- terminal block
- plate
- connection
- Prior art date
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
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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
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/26—Structural association of machines with devices for cleaning or drying cooling medium, e.g. with filters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/06—Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations
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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
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
Definitions
- the present invention relates to a rotating electrical machine used for vehicle driving, regenerative power generation, and the like.
- This application claims priority on November 22, 2011 based on Japanese Patent Application No. 2011-255216 for which it applied to Japan, and uses the content for it here.
- bus bars (relay conductors) corresponding to the number of phases of the rotating electrical machine are installed apart from each other on the terminal block body formed of an insulating material such as an insulating resin.
- an external power supply line is connected to one end side of each bus bar, while an end portion of each phase coil conductor is connected to the other end side of each bus bar.
- a terminal block is installed close to the outer peripheral surface of the stator, and a base wall is provided on the terminal block main body so that the connection portions of the coil conductors of each bus bar are spaced apart from each other, and on the inner wall and base wall of the rotating electrical machine housing
- An outer wall disposed along the edge of the base wall and a plurality of partition walls that extend from the outer wall to the base wall side and insulate the peripheral area of each connection portion together with the outer wall; It was considered to establish.
- each connection portion can be maintained in an insulated state with a simple configuration.
- the cooling liquid for cooling the stator enters the inside of the terminal block, the flow of the cooling liquid is prevented by the partition walls, and impurities mixed in the cooling liquid can be accumulated in the peripheral area of the connection portion. Sex is conceivable. If a large amount of impurities accumulates in the peripheral area of the connection portion, there is a concern that the insulation between adjacent connection portions may be hindered.
- the present invention provides a rotating electrical machine capable of maintaining insulation between connection parts on a terminal block over a long period of time so that impurities mixed in the coolant do not accumulate around the connection part on the terminal block. It is something to be offered.
- a rotating electrical machine includes a stator around which a plurality of phases of coil conductors are wound; a housing that houses the stator; and the housing that is attached to the housing and pulled out from the stator
- a rotating electric machine wherein the terminal block body includes a base wall in which connection portions between the relay conductors and the corresponding coil conductor end portions are spaced apart from each other; an inner wall of the housing and the base An outer wall disposed along the edge of the base wall and between the connecting
- a plurality of partition walls that are insulated; a connection space portion that is surrounded by the base wall, the outer wall, and the plurality of partition walls to receive the connection portion; and the connection space portion and the inner wall side of the housing And a slit communicating with each other.
- the slit may open vertically downward from the connection space portion side.
- each relay conductor has a plate-like portion having a constant thickness that is thinner than the width of the slit, and the plate-like portion is in the plate thickness direction. You may insert in the said slit from the orthogonal direction.
- the plate-like portion may be provided with a bent portion or a curved portion.
- the insertion direction of the plate-like portion with respect to the slit of one of the plurality of relay conductors is a plate-like shape with respect to the corresponding slit of the other relay conductor. It may be different from the insertion direction of the part.
- the insertion direction of the plate-like portion with respect to the slit of one relay conductor of the plurality of relay conductors is plate-like with respect to the corresponding slit of the other relay conductor. It may be different from the insertion direction of the part.
- a rotating electrical machine includes a stator around which a plurality of phases of coil conductors are wound; a housing that houses the stator; and each of the stators attached to the housing and drawn out from the stator
- a plurality of relay conductors connected to the electric wire and connected at the other end to the ends of the coil conductors of each phase; and a terminal block body formed of an insulating material and holding the plurality of relay conductors.
- the terminal block body has a base wall in which connection portions between the relay conductors and corresponding ends of the coil conductors are spaced apart from each other; on the base wall, the base A partition wall erected in a direction intersecting with each other and separating the connection portions; an insertion port through which the relay conductor is inserted into the terminal block body from the outside of the terminal block body; and the base wall and the partition wall And a slit having a conductor accommodating portion formed therebetween.
- the slit may be opened vertically below the connection portion.
- each relay conductor has a plate-like portion having a constant thickness that is thinner than the width of the slit, and the plate-like portion is perpendicular to the plate thickness direction. It may be inserted into the slit.
- each relay conductor has a plate-like portion having a constant thickness thinner than the width of the slit, and the plate-like portion is in the plate thickness direction. You may insert in the said slit from the orthogonal direction.
- the plate-like portion may be provided with a bent portion or a curved portion.
- the plate-like portion may be provided with a bent portion or a curved portion.
- the conductor housing portion may have a portion whose width is wider than the thickness of the relay conductor.
- the conductor housing portion may have a portion whose width is wider than the thickness of the relay conductor.
- connection part with the coil conducting wire of each relay conductor on a base wall is surrounded by a base wall, an outer side wall, and a partition, a connection part can be maintained with the circumference
- coolant that has entered the inside of the terminal block can be discharged from the connection space inside the terminal block to the inner wall side of the housing through the slit. Therefore, it is possible to prevent the impurities mixed in the coolant from accumulating around the connection portion on the terminal block. As a result, the insulation between the connection parts on the terminal block can be maintained over a long period of time.
- the coolant containing the impurities that have flowed into the connection space portion receives gravity and flows into the slit, it is possible to more effectively suppress the accumulation of impurities around the connection portion. Can do.
- the relay conductor is provided with a plate-like portion having a substantially constant thickness that is thinner than the width of the slit, and the plate-like portion is inserted into the slit from a direction substantially perpendicular to the plate thickness direction. Therefore, a gap is formed between the plate-like portion and the slit forming portion. Through this gap, the coolant flowing into the terminal block and the impurities mixed in the coolant can be reliably discharged to the inner wall side of the housing.
- the plate-like portion is made large in the terminal block main body when the temperature changes while the bent portion or the curved portion has a high degree of freedom according to the shape and layout of other parts such as the housing. It is possible to prevent stress from occurring.
- the insertion direction of the plate-like portion with respect to the slit of one relay conductor is different from the insertion direction of the plate-like portion with respect to the corresponding slit of the other relay conductor. Therefore, the connection portion of the one relay conductor can be easily set to be substantially the same height as the connection portion of at least one other relay conductor on the base wall.
- connection part with the coil conducting wire of each relay conductor on a base wall is each spaced apart, and it is separated by the partition erected in the direction which cross
- the coolant entering the inside of the terminal block can be discharged from the connection space inside the terminal block through the slit to the inner wall side of the housing. Therefore, it is possible to prevent the impurities mixed in the coolant from accumulating around the connection portion on the terminal block. As a result, the insulation between the connection parts on the terminal block can be maintained over a long period of time.
- the coolant containing the impurities flowing into the connection space portion receives gravity and flows into the slit, it is possible to more effectively suppress the accumulation of impurities around the connection portion. Can do.
- the relay conductor is provided with a plate-like portion having a substantially constant thickness thinner than the width of the slit, and the plate-like portion is inserted into the slit from a direction substantially orthogonal to the plate thickness direction. Therefore, a gap is formed between the plate-like portion and the slit forming portion. Through this gap, the coolant flowing into the terminal block and the impurities mixed in the coolant can be reliably discharged to the inner wall side of the housing.
- the plate-like portion is formed into a shape having a high degree of freedom according to the shape and layout of other parts such as the housing by the bent portion or the curved portion, and the terminal is changed when the temperature changes. It is possible to prevent a large stress from being generated in the base body.
- a clearance gap is made between a conductor accommodating part and a relay conductor.
- the coolant flowing into the terminal block and the impurities mixed in the coolant can be reliably discharged to the inner wall side of the housing.
- the relative displacement is reduced between the conductor housing portion and the relay conductor. Since it can be absorbed by the gap formed between them, unnecessary stress can be prevented from occurring in the terminal block body.
- FIG. 1 It is a partial front view of the rotary electric machine which concerns on one Embodiment of this invention. It is the perspective view which looked at the terminal block used for the rotary electric machine which concerns on one Embodiment of this invention from the front side diagonally upward. It is the perspective view which looked at the terminal block of the rotary electric machine which concerns on one Embodiment of this invention from the left diagonal upper direction of FIG. It is the perspective view which looked at the terminal block of the rotary electric machine which concerns on one Embodiment of this invention from the back side. It is a disassembled perspective view of the terminal block for demonstrating assembly
- FIG. 3 is a cross-sectional view corresponding to the AA cross section of FIG. 2 of the terminal block of the rotating electrical machine according to the embodiment of the present invention.
- FIG. 3 is a perspective view when the terminal block of the rotating electrical machine according to the embodiment of the present invention is cut along a BB cross-sectional portion of FIG. 2.
- FIG. 3 is a perspective view when the terminal block of the rotating electrical machine according to the embodiment of the present invention is cut along a CC cross-section in FIG. 2.
- FIG. 3 is a cross-sectional view corresponding to the CC cross section of FIG. 2 of the terminal block of the rotating electrical machine according to the embodiment of the present invention.
- FIG. 10 is a cross-sectional view corresponding to the DD cross section of FIG.
- FIG. 10 is a cross-sectional view corresponding to the EE cross section of FIG. 9 of the terminal block of the rotating electrical machine according to the embodiment of the present invention. It is a perspective view of the connector for electric power feeding line connection connected to the terminal block of the rotary electric machine concerning one embodiment of the present invention. It is a perspective view which shows the state which connected the connector to the terminal block of the rotary electric machine which concerns on one Embodiment of this invention.
- FIG. 14 is a cross-sectional view corresponding to the FF cross section of FIG. 13 of the rotating electrical machine according to the embodiment of the present invention.
- FIG. 1 is a front view showing a part of the rotating electrical machine according to this embodiment.
- the rotating electrical machine according to the present embodiment is a three-phase alternating current rotating electrical machine used for vehicle driving and regenerative power generation of an electric vehicle or a hybrid vehicle, and a rotor (not shown) is rotatable inside the annular stator 1. Has been placed. The rotor is connected to the axle of the vehicle via a speed reduction mechanism or the like.
- the stator 1 includes an annular stator core 2 in which a plurality of coil conductors 5 are mounted by salient pole concentrated winding, and a substantially cylindrical holder 6 into which the stator core 2 is press-fitted and fixed. Further, in this stator 1, the feeding terminals 7U and 7V of the corresponding phases are respectively connected to the feeding-side ends of the U-phase, V-phase, and W-phase coil conductors 5 drawn out from the stator core 2 in the radial direction of the holder 6. , 7W are connected.
- the coil conducting wire 5 is a rectangular wire having a horizontally long rectangular cross section.
- the stator core 2 is composed of a plurality of divided core pieces 8 that are substantially fan-shaped when viewed from the front, and each coiled wire 5 is wound around each divided core piece 8 individually.
- One end side of each coil conducting wire 5 wound around the split core piece 8 is collected for each phase and connected to the corresponding phase power supply terminals 7U, 7V, 7W.
- the other end sides of the coil conductors 5 are all gathered in one place, and are electrically connected to each other as a midpoint connecting portion 18. Therefore, in this stator core 2, the coil conducting wire 5 of each phase is connected by Y connection.
- reference numeral 19 denotes a metal binding plate that holds the coil conducting wire 5 constituting the midpoint connecting portion 18 and is connected to each coil conducting wire 5 by a fusing process.
- the stator 1 configured as described above is fixedly installed inside a metal housing 4 together with a terminal block 3 for connecting the power supply terminals 7U, 7V, and 7W to an external power supply line.
- a corner portion having a substantially L-shaped cross section is provided at the lower end of the housing 4, and the terminal block 3 is disposed in the vicinity of the corner portion in the housing 4.
- FIG. 2 to 4 are views showing the overall appearance of the terminal block 3.
- the terminal block 3 includes a terminal block body 10 formed of an insulating resin material and U, V, and W three-phase bus bars 11U and 11V held by the terminal block body 10. , 11W (relay conductor).
- Each bus bar 11U, 11V, 11W is formed of a conductive metal plate having a substantially constant thickness as a whole.
- the terminal block body 10 includes an arc-shaped base wall 22 extending in a direction substantially orthogonal to the axis of the stator 1, and an outer wall 23 surrounding three sides except the arc-shaped inner peripheral side of the base wall 22.
- the inner peripheral side of the base wall 22 where the outer wall 23 does not exist faces the outer peripheral surface of the stator 1 (holder 6). Therefore, the terminal block main body 10 forms a concave space surrounded by the base wall 22, the outer wall 23, and the outer peripheral surface of the stator 1 in a state where the terminal block 3 is fixedly installed in the housing 4 together with the stator 1.
- the front surface of the base wall 22 of the terminal block body 10 on which the outer wall 23 protrudes is referred to as the front surface
- the front surface of the base wall 22 has three-phase bus bars of U, V, and W.
- Connection portions 11Ua, 11Va, and 11Wa of 11U, 11V, and 11W with corresponding coil conductors 5 are spaced apart in the arc direction.
- Reference numeral 12 in the figure denotes bolt insertion holes provided in the connection portions 11Ua, 11Va, 11Wa on the bus bars 11U, 11V, 11W.
- each connection part 11Ua, 11Va, and 11Wa are arranged along with the order of U, V, and W from the bottom to the top as shown in FIG.
- a bolt fastening portion 13 for coupling the terminal block 3 (terminal block main body 10) to the housing 4 is provided at a position almost immediately below the vertical direction.
- 2 is a bolt insertion hole into which the fastening bolt 25 shown in FIG. 1 is inserted.
- symbol 24 in FIG. 1 is a volt
- the terminal block body 10 includes a first partition wall 27 that partitions the W-phase connection portion 11Wa and the V-phase connection portion 11Va on the front surface of the base wall 22, and a V-phase connection portion 11Va and a U-phase connection portion.
- a second partition wall 28 for partitioning 11 Ua and a third partition wall 29 for partitioning between the U-phase connecting portion 11 Ua and the bolt fastening portion 13 are provided.
- the first partition wall 27, the second partition wall 28, and the third partition wall 29 extend toward the base wall 22 from positions separated from each other in the arc direction of the outer wall 23. More precisely, these partition walls 27, 28, 29 respectively extend in a direction (R direction) substantially toward the axial center of the stator 1 when the terminal block 3 is fixed in the housing 4 together with the stator 1, Each extended region is connected to the base wall 22.
- the first partition wall 27 surrounds the W-phase connection portion 11Wa together with the upper end regions of the base wall 22 and the outer wall 23 to form an insulating space 30W for the W-phase connection portion. Further, the first partition wall 27 and the second partition wall 28 surround the V-phase connection portion 11Va together with the intermediate region between the base wall 22 and the outer wall 23 to form an insulating space 30V of the V-phase connection portion. Further, the second partition wall 28 and the third partition wall 29 surround the U-phase connection portion 11Ua together with the intermediate region further below the base wall 22 and the outer wall 23 to form an insulating space 30U for the U-phase connection portion.
- the third partition wall 29 surrounds the bolt fastening portion 13 together with the lower end region of the base wall 22 and the outer wall 23 to form an insulating space 30N.
- a midpoint connecting portion 18 protruding radially outward from the stator 1 is inserted into the insulating space 30N so as to be separated from the head of the bolt 25 of the bolt fastening portion 13 in the axial direction Ax.
- the midpoint connection portion 18 is electrically insulated from the adjacent U-phase connection portion 11Ua and the housing 4 by the third partition wall 29 and the outer wall 23.
- a substantially box-shaped connector connecting portion 31 is provided in an intermediate region near the lower side of the outer wall 23 of the terminal block body 10 so that a part thereof bulges into the U-phase insulating space 30U.
- the connector connecting portion 31 includes a box upper wall 31a and a box side wall 31b (see FIG. 2) that constitute a part of an intermediate region of the outer wall 23, and a box end that closes both end faces of the box upper wall 31a and the box side wall 31b.
- the wall 31c, 31d (see FIG. 3 and FIG. 4), the region corresponding to the wall facing the box upper wall 31a among the six faces of the box shape, and the wall facing the box side wall 31b The area opens continuously. As shown in FIG.
- the connector connecting portion 31 has a concave portion 32 formed by a box upper wall 31a, a box side wall 31b, and box end walls 31c, 31d on both sides at the lower end on the outer surface side of the outer wall 23. Yes.
- the substantially box-shaped connector connecting portion 31 constitutes a part of the outer wall 23.
- connection parts 11Ub, 11Vb, 11Wb on the power supply line connection side of the three-phase bus bars 11U, 11V, 11W are arranged in a line along the axial direction Ax. It is like that.
- FIG. 5 is a diagram showing the shape of each bus bar 11U, 11V, 11W and the assembled state of the bus bars 11U, 11V, 11W with respect to the terminal block main body 10.
- each of the bus bars 11U, 11V, and 11W includes coil-side connection portions 11Ua, 11Va, and 11Wa and a power-supply-side connection portion 11Ub, 11Vb, and 11Wb that are formed by flat walls.
- the connection parts 11Ua, 11Va, 11Wa and 11Ub, 11Vb, 11Wb are connected by bent connection walls 11Uc, 11Vc, 11Wc, respectively.
- connection portions 11Ua, 11Va, and 11Wa are arranged in the corresponding insulating spaces 30U, 30V, and 30W in a vertical posture so as to follow the front surface of the base wall 22.
- each connection part 11Ub, 11Vb, 11Wb by the side of a feeder is arrange
- the bus bars 11U, 11V, and 11W are connected to the coil-side connection portions 11Ua, 11Va, and 11Wa and the connection walls 11Uc, 11Vc, and 11Wc through slits 33U, 33V, and 33W formed in the outer wall 23 of the terminal block body 10. Are inserted inside the terminal base body 10 (the side where the insulating spaces 30U, 30V, 30W exist).
- each bus bar 11U, 11V, 11W and the corresponding slits 33U, 33V, 33W will be described.
- the W-phase and V-phase bus bars 11W and 11V and the slits 33W and 33V will be described.
- 6 to 11 are views showing the details of the slits 33W and 33V and their peripheral portions.
- 7, 10, and 11 show a state in which the power supply terminals 7 ⁇ / b> W and 7 ⁇ / b> V are coupled to the bus bars 11 ⁇ / b> W and 11 ⁇ / b> V by the bolts 24. As shown in FIG.
- the W-phase bus bar 11 ⁇ / b> W has a bent piece portion of a connection wall 11 ⁇ / b> Wc that is bent substantially horizontally toward the base wall 22 side at the lower end of the connection portion 11 ⁇ / b> Wa arranged on the front surface of the base wall 22 in a vertical posture.
- 11Wc-1 is continuously provided, and a lead-out portion 11Wc-2 of the connection wall 11Wc disposed along the outer surface of the outer wall 23 is connected to the outer end of the bent piece portion 11Wc-1 in the radial direction (R direction).
- a connecting portion 11Wb disposed in the concave portion 32 in a horizontal posture is connected to the lower end of the routing portion 11Wc-2.
- the V-phase bus bar 11 ⁇ / b> V is a connecting wall that extends straight downward along the front surface of the base wall 22 at the lower end of the connection portion 11 ⁇ / b> Va arranged in the vertical position on the front surface of the base wall 22.
- a lower extending portion 11Vc-1 of 11Vc is continuously provided, and a lower end of the lower extending portion 11Vc-1 is provided at the lower end of the connecting wall 11Vc arranged along the lower surface of the box upper wall 31a of the connector connecting portion 31. -2 is connected.
- the W-phase slit 33W and the V-phase slit 33V are formed in a substantially L-shape having long sides along the vertical direction. ing.
- the groove width w of these slits 33W and 33V is set to a dimension (w> t) wider than the thickness t of the bus bars 11W and 11V (see FIG. 5).
- the W-phase slit 33W is formed to extend from the outer wall 23 to the first partition wall 27 and a part of the base wall 22.
- the first partition wall 27 has a vertical groove portion 33W-1 (of the W phase) of the slit 33W over a range extending from the outer wall 23 of the boundary portion with the base wall 22 to a predetermined length. (Opening downward from the insulating space 30W side).
- the base wall 22 is provided with a horizontal groove portion 33W-2 of a slit 33W so as to be continuous with the bottom portion of the vertical groove portion 33W-1, and these groove portions 33W-1 and 33W-2 are substantially L-shaped on the outer wall 23. It is continuous to the through part.
- connection portion 11Wa of the bus bar 11W and the bent piece portion 11Wc-1 of the connection wall 11Wc are inserted into the slit 33W.
- Reference numeral 34 in FIG. 6 and FIG. 11 is an embedded nut embedded in the base wall 22 in order to connect the connecting portions 11Wa and 11Va of the power supply terminals 7W and 7V and the bus bars 11W and 11V with the bolts 24.
- an embedded nut for connecting the power supply terminal 7U and the connection portion 11Ua of the bus bar 11U with the bolt 24 is provided in a region corresponding to the insulating space 33U in the base wall 22.
- the W-phase bus bar installation surface 22w of the base wall 22 avoids that the thickness of the peripheral region of the V-phase embedded nut 34 cannot be sufficiently secured by the W-phase slit 33W. Therefore, the height in the axial direction (Ax) direction is set lower than the bus bar installation surface 22v for the V phase.
- a portion of the first partition wall 27 facing the slit 33W is provided with a pair of locking projections 35 and 36 for holding and fixing the bus bar 11W inserted into the slit 33W between the opposing walls of the slit 33W. It has been.
- One locking projection 35 is provided within the range of the thickness of the general portion of the first partition wall 27, and the other locking projection 36 is provided so as to protrude upward in the axial direction on the extending base side of the first partition wall 27.
- One locking protrusion 35 is formed over a relatively long range in the radial direction (R direction) on the terminal end side of the slit 33 ⁇ / b> W, and the other locking protrusion 36 is in the vicinity of the outer wall 23.
- the other locking protrusion 36 is disposed so as to be spaced apart upward from the one locking protrusion 35, and between the locking protrusions 35 and 36. A gap in the vertical direction is secured.
- the slit 33 ⁇ / b> W accommodates the bus bar 11 ⁇ / b> W between the insertion port through which the bus bar 11 ⁇ / b> W (relay conductor) is inserted from the outside of the terminal block body 10 into the terminal block body 10 and the base wall 22 and the first partition wall.
- a conductor housing portion In at least a part of the conductor housing portion, the bus bar 11W is thinner than the conductor housing portion. That is, the width
- the V-phase slit 33V is formed to extend from the outer wall 23 to a part of the second partition wall 28 and the box upper wall 31a.
- the slit 33V opens vertically downward from the V-phase insulating space 30V side.
- the connection portion 11Va of the bus bar 11V and the downward extension portion 11Vc-1 of the connection wall 11Vc are inserted into the slit 33V.
- a downwardly extending portion 11Vc-1 of the bus bar 11V inserted into the slit 33V is provided between the lower surface of the second partition wall 28 of the terminal block 3 and the box upper wall 31a.
- An auxiliary partition wall 37 is provided for electrical insulation with respect to the 11U connection portion 11Ua.
- the auxiliary partition wall 37 is also integrally coupled to the front surface of the base wall 22, but a vertical groove 33V-1 (see FIG. 11) constituting a part of the slit 33V is formed at the boundary with the base wall 22. Is formed.
- the vertical groove 33V-1 side wall is provided with a pair of locking projections 38 and 39 for holding and fixing the bus bar 11V inserted into the slit 33V between the opposing wall of the slit 33V. .
- the bus bar 11V is held in the slit 33V by the locking projections 38 and 39, but there is a gap between the bus bar 11V and the slit forming portion. Therefore, when the coolant L for cooling the stator 1 enters the insulating space 30V of the terminal block 3, the coolant L is discharged to the outside of the outer wall 23 through the slit 33V.
- the connection portion 11Va and the downward extension portion 11Ac-1 are inserted into the slit 33V along the radial direction (R direction) in a direction substantially orthogonal to the plate thickness direction.
- the U-phase bus bar 11U and the slit 33U will be described.
- the U-phase bus bar 11 ⁇ / b> U has a connection wall 11 ⁇ / b> Uc extending along the upper surface of the third partition wall 29 at the lower end of the coil-side connection portion 11 ⁇ / b> Ua arranged in the vertical position on the front surface of the base wall 22. It is bent and provided.
- the connection wall 11Uc is formed so as to have a crank shape when seen in a plan view, and a connection portion 11Ub on the feeder line side is connected to the end portion on the opposite side to the connection portion 11Ua at an inclination of a set angle.
- the U-phase slit 33 ⁇ / b> U is formed across a part of the box end wall 31 c and the box side wall 31 b.
- the slit 33U is formed substantially horizontally along the axial direction (Ax direction), and the groove width w is a dimension (w> t) wider than the thickness t of the bus bar 11U, like the other slits 33W and 33V. It is set (see FIG. 5).
- the third partition wall 29 that separates the lower end of the U-phase leading edge space 30U is inclined downward toward the box side wall 31b, and the U-phase slit 33U is formed on the box side wall 31b. It is formed at a position adjacent to the connecting portion with the third partition wall 29.
- the U-phase slit 33U is also opened substantially vertically downward from the U-phase insulating space 30U side.
- the U-phase bus bar 11U is inserted into the slit 33U along the axial direction (Ax direction) in a direction substantially perpendicular to the plate thickness direction, with the connection portion 11Ua on the feeder line side and a part of the connection wall 11Uc. Is done.
- FIG. 12 is a view showing a connector 40 that is installed on the side surface of the lower end of the housing 4 and connects an external power supply line (not shown) and the bus bars 11U, 11V, 11W of the terminal block 3.
- 13 and 14 are diagrams showing the connection state between the connector 40 and the terminal block 3.
- the connector 40 has three terminals 41U, 41V, 41W connected to three-phase external power supply lines of U, V, W, and a guide wall 42 surrounding these terminals 41U, 41V, 41W.
- the guide wall 42 and the tips of the terminals 41U, 41V, 41W are inserted into the connector connecting portion 31 of the terminal block 3.
- the distal end portions of the terminals 41U, 41V, and 41W inserted into the connector connection portion 31 are coupled by bolts 43 to the connection portions 11Ub, 11Vb, and 11Wb of the corresponding bus bars 11U, 11V, and 11W.
- connection portions between the bus bars 11U, 11V, 11W and the power supply terminals 7U, 7V, 7W on the base wall 22 of the terminal block 3 or the midpoint connection portion 18 are used. Is surrounded by at least one of the first partition wall 27, the second partition wall 28, and the third partition wall 29 and the outer wall 23. Therefore, the connection part of each phase and the midpoint connection part 18 can be reliably maintained in an insulated state with respect to adjacent connection parts, surrounding members such as the housing 4 and the like.
- slits 33W, 33V, and 33U that connect the roots of the first partition 27, the second partition 28, and the third partition 29 and the outside of the outer wall 23 to the outer wall 23 of the terminal block 3.
- the cooling liquid for cooling the stator that has entered the inside of the terminal block 3 can be quickly discharged from the upper portions of the partition walls 27, 28, and 29 to the outside of the terminal block 3 through the slits 33 ⁇ / b> W, 33 ⁇ / b> V, and 33 ⁇ / b> U.
- the coolant containing the impurities receives gravity and flows into the slit, so that it is possible to more effectively suppress the accumulation of impurities around the connection portion. .
- bus bars 11U, 11V, and 11W are installed in the slits 33U, 33V, and 33W on the terminal block 3, respectively.
- each bus bar 11U, 11V, 11W is formed thinner than the width of the slits 33U, 33V, 33W, and is inserted into each slit 33U, 33V, 33W from a direction substantially orthogonal to the plate thickness direction. Therefore, the coolant and impurities that have entered the inside of the terminal block 3 can be reliably discharged to the outside through the gaps formed between the bus bars 11U, 11V, 11W and the slit forming portions of the terminal block 3.
- the metal bus bars 11U, 11V, and 11W are not molded inside the resin terminal block body 10, but are formed in the slits 33U, 33V, and 33W provided in the terminal block body 10.
- the bus bars 11U, 11V, and 11W which are thinner than the slits 33U, 33V, and 33W, are inserted and installed. Therefore, even if relative displacement may occur between the metal bus bars 11U, 11V, and 11W and the resin terminal block body 10 due to the difference in linear expansion coefficient during temperature change, the relative displacement may be reduced. It can absorb reliably by the clearance gap made between 11V and 11W and a slit formation part. Therefore, in this rotating electrical machine, it is possible to prevent unnecessary stress from occurring in the terminal block body 10 in advance.
- the bus bars 11U, 11V, and 11W are flexibly adapted to the shape and layout of other parts around the housing 4 and the like by providing a large number of bent portions and curved portions. If the bus bars 11U, 11V, and 11W are thus provided with a large number of bent portions and curved portions, a large relative displacement is likely to occur between the metal bus bars 11U, 11V, and 11W and the resin terminal block body 10 when the temperature changes. Become. Therefore, the structure of the terminal block 3 that accommodates the corresponding bus bars 11U, 11V, and 11W with gaps in the slits 33U, 33V, and 33W of the terminal block main body 10 has bent portions and curved portions as in this embodiment. This is particularly effective when the bus bars 11U, 11V, and 11W are employed.
- the insertion direction of the bus bar 11U with respect to the slit 33U of the terminal block body 10 is different from the insertion direction of the other bus bars 11W and 11V with respect to the corresponding slits 33W and 33V. Therefore, the connection part 11Ua on the coil side of the bus bar 11U can be easily set to substantially the same height as the connection parts 11Wa and 11Va of the other bus bars 11W and 11V on the base wall 22 of the terminal base body 10.
- Such a structure of the rotating electrical machine is advantageous in reducing the size of the terminal block 3 and thus the size of the entire apparatus.
- connection portion of each relay conductor on the base wall with the coil conductor is surrounded by the base wall, the outer wall, and the partition wall, the connection portion can be maintained in an insulated state from the surroundings.
- the coolant that has entered the inside of the terminal block can be discharged from the connection space inside the terminal block to the inner wall side of the housing through the slit. Therefore, it is possible to prevent the impurities mixed in the coolant from accumulating around the connection portion on the terminal block. As a result, the insulation between the connection parts on the terminal block can be maintained over a long period of time.
- Terminal block 4 Housing 5 Coil conductor 10 Terminal block main body 11U, 11V, 11W Bus bar (relay conductor) 11Ua, 11Va, 11Wa Connection part 22 Base wall 23 Outer wall 27 First partition (partition) 28 Second partition (partition) 29 3rd partition (partition) 30U, 30V, 30W Insulation space (connection space) 33U, 33V, 33W Slit
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
Description
本願は、2011年11月22日に、日本に出願された特願2011-255216号に基づき優先権を主張し、その内容をここに援用する。
(1)すなわち、本発明の一態様に係る回転電機は、複数相のコイル導線が巻回されたステータと;前記ステータを収容するハウジングと;前記ハウジングに取り付けられ、前記ステータから引き出された前記各相のコイル導線の端部を対応する外部の給電線に接続する端子台と;を備え、前記ステータに、前記ハウジングの内部で冷却液が供給され;前記端子台は、一端が前記外部の給電線に接続されると共に他端が前記各相のコイル導線の端部に接続される複数の中継導体と、絶縁性材料によって形成されてかつ前記複数の中継導体を保持する端子台本体と、を有する;回転電機であって、前記端子台本体が、前記各中継導体と対応するコイル導線の端部との結線部が各々離間して配置されるベース壁と;前記ハウジングの内壁と前記ベース壁上の前記結線部との間にあって前記ベース壁の端縁に沿って配置される外側壁と;前記外側壁または前記ベース壁から延出して、前記外側壁とともに前記結線部の周域を絶縁する複数の隔壁と;前記ベース壁、前記外側壁、前記複数の隔壁で囲まれて形成されて、前記結線部を収容する結線空間部と;前記結線空間部と前記ハウジングの前記内壁側とを連通するスリットと;を備える。
さらに、中継導体と端子台本体との線膨張係数の差によって中継導体と端子台本体の間に温度変化に応じた相対変位が生じた場合にも、その相対変位を板状部とスリット形成部の間にできる隙間によって吸収できるため、端子台本体に不要な応力が生じるのを未然に防止することができる。
さらに、中継導体と端子台本体との線膨張係数の差によって中継導体と端子台本体の間に温度変化に応じた相対変位が生じた場合にも、その相対変位を板状部とスリット形成部の間にできる隙間によって吸収できるため、端子台本体に不要な応力が生じるのを未然に防止することができる。
さらに、中継導体と端子台本体との線膨張係数の差によって中継導体と端子台本体の間に温度変化に応じた相対変位が生じた場合にも、その相対変位を導体収容部と中継導体の間にできる隙間によって吸収できるため、端子台本体に不要な応力が生じるのを未然に防止することができる。
図1は、この実施形態に係る回転電機の一部を示す正面図である。
本実施形態に係る回転電機は、電気自動車やハイブリッド車両の車両駆動と回生発電に用いられる三相交流式の回転電機であり、円環状のステータ1の内側には、図示しないロータが回転可能に配置されている。ロータは減速機構等を介して車両の車軸に連結されている。
本実施形態においては、コイル導線5は横長の矩形断面の平角線が採用されている。
これらの図に示すように、端子台3は、絶縁性の樹脂材料によって形成された端子台本体10と、この端子台本体10に保持されるU,V,Wの三相のバスバー11U,11V,11W(中継導体)と、を有している。各バスバー11U,11V,11Wは、全体が略一定厚みの導電性の金属板によって形成されている。
同図に示すように、各バスバー11U,11V,11Wは、コイル側の結線部11Ua,11Va,11Waと給電線側の結線部11Ub,11Vb,11Wbがそれぞれ平坦な壁によって形成されており、各結線部11Ua,11Va,11Waと11Ub,11Vb,11Wbとは、それぞれ屈曲した接続壁11Uc,11Vc,11Wcによって接続されている。コイル側の各結線部11Ua,11Va,11Waは、ベース壁22の前面に沿うように、鉛直姿勢で対応する各絶縁空間30U,30V,30W内に配置される。また、給電線側の各結線部11Ub,11Vb,11Wbは、ボックス上壁31aの下面に沿うように水平姿勢でコネクタ接続部31の凹状部32内に配置される。
各バスバー11U,11V,11Wは、端子台本体10の外側壁23に形成されたスリット33U,33V,33Wを通じて、コイル側の各結線部11Ua,11Va,11Waと接続壁11Uc,11Vc,11Wcの一部とが端子台本体10の内側(絶縁空間30U,30V,30Wの存在する側)に挿入されている。
最初に、W相とV相のバスバー11W,11Vとスリット33W,33Vについて説明する。
図6~図11は、スリット33W,33Vとその周辺部の詳細とを示す図である。なお、図7,図10,図11は、給電端子7W,7Vがバスバー11W,11Vにボルト24によって結合された状態を示している。
W相のバスバー11Wは、図5に示すように、鉛直姿勢でベース壁22の前面に配置される結線部11Waの下端に、ベース壁22側に略水平に屈曲した接続壁11Wcの屈曲片部11Wc-1が連設され、屈曲片部11Wc-1の径方向(R方向)外側の端部には外側壁23の外面に沿って配置される接続壁11Wcの引き回し部11Wc-2が接続されている。引き回し部11Wc-2の下端には、水平姿勢で凹状部32内に配置される結線部11Wbが接続されている。
また、図6に示すようにベース壁22のW相用のバスバー設置面22wは、W相用のスリット33WによってV相の埋め込みナット34の周域の肉厚を充分に確保できなくなるのを回避するために、V相用のバスバー設置面22vよりも軸方向(Ax)方向の高さが低く設定されている。
なお、バスバー11Wは、結線部11Waと屈曲片部11Wc-1とが、板厚方向と略直交する方向で、径方向(R方向)に沿って外側壁23のスリット33W内に挿入される。
スリット33Wは、上述の通り、バスバー11W(中継導体)が端子台本体10の外部から端子台本体10へ挿入される挿入口と、ベース壁22と第1隔壁との間にバスバー11Wが収容される導体収容部とを有している。導体収容部の少なくとも一部において、バスバー11Wの厚みは、導体収容部の幅よりも薄い。すなわち、導体収容部の幅が、その幅において、中継導体の厚みよりも広い部分を有している。
なお、バスバー11Vは、結線部11Vaと下方延出部11Ac-1とが、板厚方向と略直交する方向で、径方向(R方向)に沿ってスリット33V内に挿入される。
U相のバスバー11Uは、図5に示すように、鉛直姿勢でベース壁22の前面に配置されるコイル側の結線部11Uaの下端に、第3隔壁29の上面に沿うように接続壁11Ucが屈曲して設けられている。接続壁11Ucは、平面視した場合にクランク状となるように形成され、結線部11Uaと逆側の端部に、設定角度傾斜して給電線側の結線部11Ubが連設されている。
なお、U相用のバスバー11Uは、給電線側の結線部11Uaと接続壁11Ucの一部が、板厚方向と略直交する方向で、軸方向(Ax方向)に沿ってスリット33U内に挿入される。
このような回転電機の構造は、端子台3の小型化、延いては装置全体の小型化を図るうえで有利となる。
3 端子台
4 ハウジング
5 コイル導線
10 端子台本体
11U,11V,11W バスバー(中継導体)
11Ua,11Va,11Wa 結線部
22 ベース壁
23 外側壁
27 第1隔壁(隔壁)
28 第2隔壁(隔壁)
29 第3隔壁(隔壁)
30U,30V,30W 絶縁空間(結線空間部)
33U,33V,33W スリット
Claims (15)
- 複数相のコイル導線が巻回されたステータと;
前記ステータを収容するハウジングと;
前記ハウジングに取り付けられ、前記ステータから引き出された前記各相のコイル導線の端部を対応する外部の給電線に接続する端子台と;
を備え、
前記ステータに、前記ハウジングの内部で冷却液が供給され;
前記端子台は、一端が前記外部の給電線に接続されると共に他端が前記各相のコイル導線の端部に接続される複数の中継導体と、絶縁性材料によって形成されてかつ前記複数の中継導体を保持する端子台本体と、を有する;
回転電機であって、
前記端子台本体が、
前記各中継導体と対応するコイル導線の端部との結線部が各々離間して配置されるベース壁と;
前記ハウジングの内壁と前記ベース壁上の前記結線部との間にあって前記ベース壁の端縁に沿って配置される外側壁と;
前記外側壁または前記ベース壁から延出して、前記外側壁とともに前記結線部の周域を絶縁する複数の隔壁と;
前記ベース壁、前記外側壁、前記複数の隔壁で囲まれて形成されて、前記結線部を収容する結線空間部と;
前記結線空間部と前記ハウジングの前記内壁側とを連通するスリットと;
を備える
ことを特徴とする回転電機。 - 前記スリットは、前記結線空間部側から鉛直下方に開口していることを特徴とする請求項1に記載の回転電機。
- 前記各中継導体は、前記スリットの幅よりも薄い一定厚みの板状部を有し、
前記板状部が板厚方向と直交する方向から前記スリットに挿入されていることを特徴とする請求項1または2に記載の回転電機。 - 前記板状部は、屈曲部または湾曲部が設けられていることを特徴とする請求項3に記載の回転電機。
- 前記複数の中継導体のうちの一つの中継導体の前記スリットに対する板状部の挿入方向は、その他の中継導体の対応する前記スリットに対する板状部の挿入方向と異なっていることを特徴とする請求項4に記載の回転電機。
- 前記複数の中継導体のうちの一つの中継導体の前記スリットに対する板状部の挿入方向は、その他の中継導体の対応する前記スリットに対する板状部の挿入方向と異なっていることを特徴とする請求項3に記載の回転電機。
- 複数相のコイル導線が巻回されたステータと;
前記ステータを収容するハウジングと;
前記ハウジングに取り付けられ、前記ステータから引き出された前記各相のコイル導線の端部を対応する外部の給電線に接続する端子台と;
を備え、
前記ステータに、前記ハウジングの内部で冷却液が供給され;
前記端子台は、一端が前記外部の給電線に接続されると共に他端が前記各相のコイル導線の端部に接続される複数の中継導体と、絶縁性材料によって形成されてかつ前記複数の中継導体を保持する端子台本体と、を有する;
回転電機であって、
前記端子台本体が、
前記各中継導体と対応するコイル導線の端部との結線部が各々離間して配置されるベース壁と;
前記ベース壁上において、前記ベース壁と交差する方向に立設され、前記各結線部間を隔てる隔壁と;
前記端子台本体の外部から前記中継導体が前記端子台本体へ挿入される挿入口と、前記ベース壁と前記隔壁との間に形成された導体収容部とを有するスリットと;
を備えることを特徴とする回転電機。 - さらに、前記ハウジングの内壁と前記ベース壁上の前記結線部との間にあって前記ベース壁の端縁に沿って配置される外側壁と;
前記ベース壁、前記外側壁、前記隔壁で囲まれて形成されて、前記結線部を収容する結線空間部と;
を備え、
前記スリットは前記結線空間部と前記ハウジングの内壁側とを連通する;
ことを特徴とする請求項7に記載の回転電機。 - 前記スリットは、前記結線部の鉛直下方に開口している
ことを特徴とする請求項7または8に記載の回転電機。 - 前記各中継導体は、前記スリットの幅よりも薄い一定厚みの板状部を有し、
前記板状部が板厚方向と直交する方向から前記スリットに挿入されていることを特徴とする請求項9に記載の回転電機。 - 前記各中継導体は、前記スリットの幅よりも薄い一定厚みの板状部を有し、
前記板状部が板厚方向と直交する方向から前記スリットに挿入されていることを特徴とする請求項7または8に記載の回転電機。 - 前記板状部は、屈曲部または湾曲部が設けられていることを特徴とする請求項11に記載の回転電機。
- 前記板状部は、屈曲部または湾曲部が設けられていることを特徴とする請求項10に記載の回転電機。
- 前記導体収容部が、その幅において、前記中継導体の厚みよりも広い部分を有することを特徴とする請求項7または8に記載の回転電機。
- 前記導体収容部が、その幅において、前記中継導体の厚みよりも広い部分を有することを特徴とする請求項9に記載の回転電機。
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DE112012004862.8T DE112012004862B4 (de) | 2011-11-22 | 2012-11-16 | Elektrische Umlaufmaschine |
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- 2012-11-16 CN CN201280056836.2A patent/CN103947088B/zh active Active
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Also Published As
Publication number | Publication date |
---|---|
JPWO2013077264A1 (ja) | 2015-04-27 |
CN103947088B (zh) | 2016-08-24 |
DE112012004862T5 (de) | 2014-08-07 |
JP5655158B2 (ja) | 2015-01-14 |
US20140319939A1 (en) | 2014-10-30 |
CN103947088A (zh) | 2014-07-23 |
DE112012004862B4 (de) | 2022-06-15 |
US9136739B2 (en) | 2015-09-15 |
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