JP2008148479A - Motor and manufacturing method of armature - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily to connect a plurality of lead wires of an armature while preventing the scale-up of a motor. <P>SOLUTION: The armature of the motor includes six bus bar plates 2131 laminated on the upper part of a stator core 211 in a center shaft J1 direction and connected to a plurality of U-shape conductors. Each of the bus bar plates 2131 is provided with a plurality of bus bars 2132 arranged in a circumferential direction, and an insulator bus bar holder 2133 formed into substantially annular shape around the center shaft J1 and having a plurality of bus bars 2132 integrally fixed thereon. In manufacture of the armature, the six bus bar plates 2131 are sequentially superimposed on the stator core 211, and one part of the conductors are sequentially connected to each of the bus bar plates 2131, thereby forming a coil. With this configuration, since the number of bus bar connection portions in each of the bus bar plates 2131 can be reduced, the lead wires can be easily connected via the bus bars while preventing the scale-up of the dimension of the motor. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electric motor and a method for manufacturing an armature of the motor.

  In recent years, vehicles have been actively developed for the purpose of reducing environmental loads such as energy saving and improvement of exhaust gas problems. An idling stop that reduces the amount of carbon dioxide discharged from the engine by automatically stopping the engine when the vehicle is stopped as one of the mechanisms for reducing the environmental load mounted on the vehicle. It has been known.

  Here, in a vehicle air conditioner, when the compressor is driven by an engine, the air conditioner is also stopped when the engine is stopped by idling stop. Therefore, the air conditioner can be driven even when the engine is stopped by making the compressor of the air conditioner into an electric type and driving the compressor with an in-vehicle battery. Since such an on-vehicle electric compressor is required to have high reliability, an IPM (interior permanent magnet) motor in which a permanent magnet is embedded in a rotor core disposed inside the armature is used as the compressor. Preferably used. In addition, the motor is required to be small and have a large output from the viewpoints of securing a space in the vehicle, improving fuel consumption, and reducing exhaust gas.

  Since an electric compressor mounted on an automobile is required to realize a large output by a relatively low-voltage vehicle-mounted battery, the current flowing through the armature coil is inevitably large. Therefore, in such a motor, in order to prevent the amount of heat generated from the coil from becoming excessive, the coil is formed by a conducting wire (for example, a flat wire) having a large cross-sectional area and a small electrical resistance.

  By the way, since it is difficult to wind a conducting wire with a large cross-sectional area around the teeth of the stator core, a technique for easily forming a coil even when these conducting wires are used has been proposed. For example, in the motor of Patent Document 1, one straight rectangular coil member is inserted into each slot of the stator core, and the end of the coil member and the end of the crossover member are aligned on both sides of the stator core. In the state, it fixes with the clip of an electric conductor, and also the part of a clip vicinity is immersed in molten solder, Two coil members are connected and the coil of an armature is formed. In the motor, short-circuiting due to the solder bridge is prevented by disposing adjacent clips in the axial direction.

  Further, in Patent Document 2, a conducting wire having a rectangular cross-sectional shape is bent into a U shape, and a leg portion of the U-shaped conducting wire is inserted into each slot of the armature, and a plurality of ends of these conducting wires are provided. A technique for forming a coil of an armature by connecting in series with a connecting conductor is disclosed.

On the other hand, in the motor of Patent Document 3, the tips of a plurality of windings concentrated on teeth are connected to a bus bar, which is a ring-shaped electrical copper plate, for each phase of UVW, and the plurality of bus bars are interposed between insulating plates. The bus bar and the insulating plate are fixed in close contact with the housing. In the motor, the heat generated in the winding is radiated through the bus bar, the insulator, and the housing, thereby suppressing the temperature rise of the winding.
JP-A-5-300687 Japanese Patent No. 3474660 JP 2005-65374 A

  By the way, in the motor of patent document 1, since it is necessary to press-fit several mutually independent clips to a conducting wire one by one, the formation of a coil becomes complicated as the number of conducting wires increases, and the manufacturing cost of the motor increases. Resulting in. Similarly, in the motor of Patent Document 2, since it is necessary to connect a plurality of connection conductors independent of each other to the conducting wire one by one, the formation of the coil becomes complicated.

  Moreover, when connecting a ring-shaped bus bar and a some conducting wire like patent document 3, the space | interval of the some junction part of the bus bar joined to a some conducting wire is joined between the said junction part and the edge part of a conducting wire. It needs to be large enough to allow work. Therefore, when the number of conducting wires connected to one bus bar increases, the diameter of the bus bar increases and the diameter of the motor increases.

  The present invention has been made in view of the above problems, and an object thereof is to easily connect a plurality of conductors of an armature while preventing an increase in size of a motor.

  The invention according to claim 1 is an electric motor, wherein a stator portion having an armature, a bearing mechanism attached to the stator portion, and a predetermined central axis between the armature And a rotor portion that is rotatably supported with respect to the stator portion around the central axis via the bearing mechanism, and the armature includes the center magnet. A stator core having a plurality of teeth arranged radially about an axis; a plurality of conductors including portions extending in parallel to the central axis in a plurality of slots between the plurality of teeth; and a direction of the central axis of the stator core A plurality of first terminals arranged on one side and connected to a part of the plurality of conductors are overlaid on the first terminal block, a first terminal block fixed to an insulator, and the plurality of conductors part A plurality of second terminals to be connected and a second terminal block which is fixed to the insulator.

  A second aspect of the present invention is the motor according to the first aspect, wherein the first terminal block and the second terminal block are substantially annular or arcuate with the central axis as a center.

  A third aspect of the present invention is the motor according to the second aspect, wherein the plurality of first terminals are fixed inside an outer peripheral edge of the insulator of the first terminal block, and the plurality of the first terminals are fixed. The second terminal is fixed inside the outer peripheral edge of the insulator of the second terminal block.

  Invention of Claim 4 is a motor in any one of Claim 1 thru | or 3, Comprising: The said holding | maintenance with which the said insulator of a said 1st terminal block hold | maintains some of these 1st terminals A conductive wire connected to the second terminal block, and an outer holding part that is disposed on the opposite side of the central axis of the inner holding part and holds a part of the plurality of first terminals, It passes between the inner holding part and the outer holding part.

  A fifth aspect of the present invention is the motor according to the fourth aspect, wherein the inner holding portion and the outer holding portion have a substantially annular shape or a substantially arc shape centered on the central axis.

  A sixth aspect of the present invention is the motor according to any one of the first to fifth aspects, wherein the field magnet is disposed on the central axis side of the annular armature centered on the central axis. The joints of the plurality of first terminals with the conducting wires and the joints of the plurality of second terminals with the conducting wires are arranged closer to the central axis than the outer peripheral edge of the stator core.

  A seventh aspect of the invention is the motor according to any one of the first to sixth aspects, wherein one second terminal overlaps a part of the plurality of first terminals in the central axis direction.

  The invention according to claim 8 is the motor according to any one of claims 1 to 7, wherein each of the plurality of conducting wires extends in parallel with the central axis accommodated in two slots, respectively. A straight portion and a bent portion that integrally connects the two straight portions on the other side in the central axis direction of the stator core while being bent between one end portions of the two straight portions.

  A ninth aspect of the present invention is the motor according to the eighth aspect, wherein the plurality of conducting wires have round conducting wires whose cross-sectional shape is a circle having a diameter of 3.16 mm or more.

  A tenth aspect of the present invention is the motor according to the eighth or ninth aspect, wherein the plurality of conductive wires include rectangular conductive wires having a rectangular cross-sectional shape.

The invention described in claim 11 is the motor described in claim 10, wherein the square conductor has a cross-sectional area of 12.3 mm ² or more.

  A twelfth aspect of the present invention is the motor according to the tenth or eleventh aspect of the present invention, wherein the end portion joined to the first terminal or the second terminal of the rectangular conducting wire has a conductor exposed on the side surface. A substantially cylindrical joint end portion, and a cross section of the joint end portion is a circle smaller than a cross section of the square wire portion of the rectangular conducting wire, and the joint end portion and the first terminal or the second terminal At the time of joining, the first terminal or the second terminal comes into contact with the end surface of the rectangular wire portion on the joining end side.

  The invention according to claim 13 is the motor according to claim 12, wherein the outer end diameter of the motor is gradually reduced as the connecting end portion moves away from the end surface of the rectangular wire portion on the connecting end portion side. The outer peripheral edge of the joining end portion on the side of the rectangular wire portion is located inside the outer peripheral edge of the square wire portion on the side of the joining end portion.

  The invention according to claim 14 is a method of manufacturing an armature for an electric motor, wherein a) a plurality of teeth arranged radially about a predetermined central axis is formed between the plurality of teeth of the stator core. Inserting a plurality of conducting wires including portions extending parallel to the central axis into a plurality of slots; b) a first terminal block having a plurality of first terminals fixed to an insulator in a direction of the central axis of the stator core C) a step of joining the plurality of first terminals to a part of the plurality of conducting wires; and d) a second terminal block in which the plurality of second terminals are fixed to an insulator. A step of overlapping the first terminal block; and e) a step of joining the plurality of second terminals to a part of the plurality of conductive wires.

  A fifteenth aspect of the present invention is the armature manufacturing method according to the fourteenth aspect, wherein the first terminal block and the second terminal block are substantially annular or substantially circular around the central axis. It is arcuate.

  A sixteenth aspect of the invention is the armature manufacturing method according to the fourteenth or fifteenth aspect, wherein each of the plurality of conductive wires extends in parallel with the central axis accommodated in two slots. Two straight portions, and a bent portion that integrally connects the two straight portions on the other side in the central axis direction of the stator core while being bent between one end portions of the two straight portions. .

  The invention according to claim 17 is the armature manufacturing method according to any one of claims 14 to 16, wherein the conducting wire, the plurality of first terminals, and the plurality of the wires in the step c) and the step e) are provided. The second terminal is joined by welding.

  The invention according to claim 18 is the method of manufacturing an armature according to any one of claims 14 to 17, wherein one second terminal is a part of the plurality of first terminals in the central axis direction. And overlap.

  In the present invention, it is possible to easily connect a plurality of conductors of the armature while preventing an increase in size of the motor. In the second, fourth to sixth, and fifteenth inventions, an increase in the size of the motor can be prevented more reliably.

  In the invention of Claim 3 and 17, the reliability of joining of a conducting wire and a terminal can be improved. In the inventions according to claims 7 and 18, the degree of freedom of terminal arrangement can be improved. In the inventions of claims 8 and 16, the manufacture of the motor can be simplified. In the twelfth and thirteenth inventions, the rectangular conducting wire and the terminal can be easily joined.

  FIG. 1 is a plan view showing an external appearance of an electric motor 1 according to the first embodiment of the present invention, and FIG. 2 is a longitudinal sectional view showing the motor 1. FIG. 2 shows a cross section of the surface including the central axis J1 of the motor 1 shown in FIG. 1, and also shows a part of the configuration on the near side and the far side of the cross section. The motor 1 is a three-phase AC motor that is used as a compressor for an air conditioner in a vehicle or the like equipped with a so-called idling stop (that is, a mechanism that automatically stops the engine when the vehicle is stopped). As shown in FIGS. 1 and 2, the motor is a vertically long motor having a length in the direction of the central axis J1 that is approximately twice the outer diameter.

  As shown in FIG. 2, the motor 1 is an inner rotor type motor, and is attached to the stator portion 2 that is a fixed assembly, the rotor portion 3 that is a rotating assembly, and the stator portion 2, and the rotor portion 3 is attached to the central axis J <b> 1. A bearing mechanism 4 that is rotatably supported with respect to the stator portion 2, a resolver portion 5 that is an apparatus for detecting an angular position of the rotor portion 3 with respect to the stator portion 2, and a substantial presence for housing these configurations. A bottom cylindrical housing 6 is provided. In the following description, for the sake of convenience, the resolver portion 5 side is described as the upper side and the stator portion 2 and rotor portion 3 side are the lower side along the central axis J1, but the central axis J1 does not necessarily coincide with the direction of gravity.

  The stator unit 2 includes an armature 21 attached to the inner peripheral surface of the housing 6, and the armature 21 includes a stator core 211 formed by laminating thin silicon steel plates. FIG. 3 is a plan view showing the stator core 211. As shown in FIG. 3, the stator core 211 has a plurality (24 in the present embodiment) of teeth 2111 radially arranged around the central axis J1 and the side opposite to the central axis J1 of the plurality of teeth 2111. A substantially annular core back 2112 that integrally holds the ends of the core back.

  FIG. 4 is a perspective view showing the stator core 211 of the armature 21 and a plurality (48 in this embodiment) of conductive wires 212 attached to the stator core 211. As shown in FIG. 4, the plurality of conductive wires 212 have portions extending in parallel to the central axis J <b> 1 in a plurality (24 in the present embodiment) of slots 2113 between the plurality of teeth 2111. The plurality of conductive wires 212 are formed as shown in FIG. A and FIG. A plurality of rectangular conductive wires 212a and round conductive wires 212b shown in FIG. In the following description, when it is not necessary to distinguish between the rectangular conductor 212a and the round conductor 212b, the rectangular conductor 212a and the round conductor 212b are collectively referred to as a conductor 212.

FIG. As shown in FIG. 5A, the rectangular conducting wire 212a is a U-shaped conducting wire having a rectangular cross-sectional shape (that is, a U-shaped flat wire). As shown in B, the round conducting wire 212b is a U-shaped conducting wire having a circular cross-sectional shape (that is, a U-shaped round wire). In the present embodiment, the diameter of the round conductor 212b is 3.16 mm or more and 3.24 mm or less. Moreover, in this Embodiment, the cross-sectional area of the square conducting wire 212a shall be 12.3 mm < ² > or more, and is made larger than the cross-sectional area of the round conducting wire 212b.

  FIG. A and FIG. As shown in B, each of the rectangular conducting wire 212a and the round conducting wire 212b is accommodated in two different slots 2113 (see FIG. 4) of the stator core 211, and two linear portions 2121 extending in parallel to the central axis J1, respectively. In addition, the end portions of the two straight portions 2121 are bent between the lower end portions (that is, the bottom portion side of the housing 6 shown in FIG. 2) of the two straight portions 2121 in the direction of the central axis J1. 211 includes a bent portion 2122 that is integrally connected to the lower side of 211. Each of the rectangular conducting wire 212a and the round conducting wire 212b is formed into a U shape by bending a linear conducting wire in the vicinity of the center portion. As shown in FIG. 4, both end portions 2123 of the plurality of conductive wires 212 (that is, ends opposite to the bent portion 2122 side of the two linear portions 2121) are on the upper side of the stator core 211 (that is, the bottom portion of the housing 6). Projecting upward from each slot 2113 of the stator core 211 on the opposite side of the opening.

  FIG. A is a cross-sectional view showing stator core 211 and conducting wire 212 (that is, rectangular conducting wire 212a and round conducting wire 212b). FIG. In A, for convenience of illustration, the cross section of the stator core 211 and the conducting wire 212 is shown without parallel oblique lines. FIG. As shown to A, in the armature 21, in each slot 2113 of the stator core 211, the linear part 2121 (refer FIG. 5.A) of the two rectangular conducting wires 212a and the linear part 2121 of the two round conducting wires 212b (FIG. 5B) is arranged in the radial direction centered on the central axis J1, and the round conducting wire 212b is disposed on the central axis J1 side of the rectangular conducting wire 212a.

  FIG. B is shown in FIG. It is a figure which expands and shows a part of stator core 211 and conducting wire 212 shown in A. FIG. As shown in FIG. B, the cross section of the portion accommodated in the slot 2113 of the rectangular conducting wire 212a has two short sides 2124 that are (substantially) parallel to the radial direction around the central axis J1 (see FIG. 6.A), and Two long sides 2125 that are substantially perpendicular to the two short sides 2124 (that is, (substantially) parallel to the circumferential direction around the central axis J1) are provided. In addition, in the vicinity of the end portion of each slot 2113 on the central axis J1 side, the round conductive wire in which the inner side surface of the slot 2113 (that is, the side surface of the two teeth 2111 sandwiching the slot 2113) is disposed closest to the central axis J1 side. Curved along the outer surface of the portion accommodated in the slot 2113 of 212b. In other words, the inner surface of each slot 2113 includes a curved portion 2114 along the outer surface of the round conducting wire 212b.

  As shown in FIG. 2, the armature 21 includes a bus bar unit 213 that is disposed on the upper side of the stator core 211 in the central axis J1 direction and connected to the end portions 2123 (see FIG. 4) of a plurality of U-shaped conductors 212. Furthermore, the bus bar unit 213 includes a bus bar plate 2131 which is a six-terminal block which is a substantially annular shape centered on the central axis J1 and is stacked in the direction of the central axis J1. In the following description, when the six bus bar plates 2131 are distinguished from each other, they are called bus bar plates 2131a to 2131f in order from the one arranged on the lower side (that is, the stator core 211 side) of the bus bar unit 213.

  FIG. A thru | or FIG. F is a plan view showing the bus bar plates 2131a to 2131f. FIG. A thru | or FIG. As shown in F, each bus bar plate 2131 (that is, bus bar plates 2131a to 2131f) has a bus bar 2132 which is a terminal of a plurality of conductors arranged in the circumferential direction at the same position with respect to the central axis J1 direction, and the center A bus bar holder 2133 which is a substantially annular shape centering on the axis J1 and which is a terminal holding portion of an insulator (resin in this embodiment) to which the plurality of bus bars 2132 are integrally fixed is provided. In each bus bar plate 2131, a plurality of bus bars 2132 are fixed to the bus bar holder 2133 inside the outer peripheral edge of the bus bar holder 2133.

  In the bus bar unit 213 shown in FIG. 2, the bus bar groups respectively held by the six bus bar holders 2133 are arranged at different positions in the direction of the central axis J <b> 1 and are respectively connected to a part of the plurality of conducting wires 212. In the armature 21, the end portions 2123 (see FIG. 4) of the plurality of conductors 212 are surrounded on the upper side of the stator core 211 by the plurality of bus bars 2132 (see FIGS. 7A to 7F) of the six bus bar plates 2131. The coils 214 are formed on the plurality of teeth 2111 (see FIG. 3) of the stator core 211 by being connected in series in the direction. In other words, the coil 214 includes a plurality of bus bars 2132 and a plurality of conductive wires 212 connected via the plurality of bus bars 2132.

  In the armature 21, each coil 214 (see FIG. 2) is formed by distributed winding in which one turn is wound around three consecutive teeth 2111 among the plurality of teeth 2111 shown in FIG. Between the two slots 2113 into which the two straight portions 2121 (see FIGS. 5A and 5B) of the conductive wires 212 are inserted, the other two of the straight portions 2121 of the other conductive wires 212 are inserted. Slot 2113 is sandwiched. In the present embodiment, the number of turns of each coil 214 is 2, and each coil 214 is formed by connecting one rectangular conducting wire 212a and a round conducting wire 212b (see FIGS. 5.A and 5.B). . In the armature 21, a plurality of rectangular conducting wires 212a and a plurality of round conducting wires 212b are alternately connected to form a coil 214, and the coil 214 is connected to an external power source via a bus bar unit 213 (see FIG. 2). The

  FIG. A thru | or FIG. Since the outer diameters of the bus bar plates 2131a to 2131f shown in F (that is, the diameter of a virtual circle circumscribing each bus bar plate) are smaller than the outer diameter of the stator core 211 (see FIG. 3), a plurality of bus bars 2132 and A joint portion 2132a of each bus bar 2132 with the conducting wire is disposed on the inner side (that is, on the central axis J1 side) than the outer peripheral edge of the stator core 211. Therefore, the plurality of conducting wires 212 and the joint portions 2132a of the plurality of bus bars 2132 are joined on the central axis J1 side with respect to the outer peripheral edge of the stator core 211. In the present embodiment, the plurality of bus bars 2132 of the bus bar plates 2131a to 2131f and the conductor 212 are joined by TIG welding.

  The rotor unit 3 shown in FIG. 2 is held by a shaft 31 centering on the central axis J1, a substantially cylindrical rotor core 32 attached by press-fitting or the like around the shaft 31, and the rotor core 32 being parallel to the central axis J1. And a plurality of field magnets 33 that are thin plate-like permanent magnets, and a substantially disk-shaped rotor cover 34 that covers both end faces of the rotor core 32 in the direction of the central axis J1. The rotor core 32 is formed by laminating thin magnetic steel plates (that is, electromagnetic steel plates) in the direction of the central axis J <b> 1, and the outer peripheral surface thereof faces the armature 21. The rotor cover 34 is made of a non-magnetic material (for example, resin or aluminum), and is fixed to the rotor core 32 with bolts or the like to restrict the movement of the field magnet 33 in the direction of the central axis J1. In the motor 1, the field magnet 33 is disposed on the center axis J 1 side of the annular armature 21 centered on the center axis J 1, and the center axis J 1 is interposed between the armature 21 and the field magnet 33. Generates rotational force (torque) at the center.

  FIG. A is a plan view showing the rotor core 32 and the field magnet 33. FIG. FIG. As shown to A, the rotor core 32 is formed with a plurality (16 in this embodiment) of magnet holding holes 321 that are parallel to the central axis J1 and penetrate the rotor core 32, and the plurality of magnets By inserting the thin plate-like field magnet 33 into each of the holding holes 321, the plurality of field magnets 33 are circles centered on the central axis J <b> 1 on the central axis J <b> 1 side from the outer peripheral surface of the rotor core 32. It is arranged on the circumference. In the present embodiment, the field magnet 33 inserted into one magnet holding hole 321 is divided into four in the direction of the central axis J1. In the following description, the four divided field magnets 33 inserted into one magnet holding hole 321 are collectively handled as one field magnet 33. The 16 field magnets 33 are arranged with their main surfaces facing the outer peripheral surface side of the rotor core 32 (that is, the armature 21 side shown in FIG. 2).

  In the rotor section 3, in two adjacent field magnets 33 arranged in a V shape that opens toward the outer peripheral surface of the rotor core 32, the polarities of the magnetic poles facing the armature 21 are made equal (hereinafter “the same” This is called “pole arrangement”.), And the two field magnets 33 form one pole. In other words, in the plurality of field magnets 33, the polarities of the magnetic poles facing the armature 21 are changed two by two in the circumferential direction around the central axis J1. In the present embodiment, the number of poles of the rotor unit 3 is eight.

  In the rotor core 32, the polarities of the magnetic poles facing the armature 21 are different from each other (hereinafter referred to as “different pole arrangement”) and adjacent pair of field magnets 33 (hereinafter referred to as “field magnet pair”). .) Between the end portions on the side farther from the central axis J1 of the adjacent field magnet pair arranged in a V shape opened toward the central axis J1) A hole 323 independent of the two magnet holding holes 321 into which the field magnet pair is inserted is formed. Since one hole 323 extending parallel to the central axis J1 is formed between a plurality of field magnet pairs arranged in different polarities (that is, between poles of the rotor 3), in this embodiment, The eight holes 323 are arranged at an equal pitch on the circumference centered on the central axis J1. The shapes of the eight holes 323 are all the same, and the relative positions with respect to the two adjacent magnet holding holes 321 are also the same.

  In the rotor core 32 of the motor 1, the hole 323 is formed in the portion 322 between the field magnets 33 arranged in different polarities, so that the magnetic resistance in the portion 322 increases. Thereby, a magnetic short circuit (so-called magnetic flux leakage) between the field magnets 33 arranged in different polarities is suppressed, and the efficiency of the motor 1 is improved. Thus, in the motor 1, the part 322 in which the hole 323 of the rotor core 32 is formed plays a role of a so-called flux barrier. In the following description, the part 322 is referred to as “flux barrier part 322”, and the hole part 323 is referred to as “flux barrier hole 323”.

  FIG. B is an enlarged view showing the vicinity of one flux barrier hole 323 of the rotor core 32. FIG. FIG. As shown in B, the flux barrier hole 323 is a surface 333 connecting the closest portions of the two field magnets 33 on both sides in the circumferential direction in the flux barrier portion 322 between the pair of field magnets arranged in different polarities. (That is, a surface 333 that connects the opposing edges of the main surface 331 of the two field magnets 33 on the central axis J1 (see FIG. 8.A) side, and is indicated by a two-dot chain line in FIG. 8.B. And the outer peripheral surface of the rotor core 32, and penetrates the rotor core 32 in the direction of the central axis J1. The cross-sectional shape of the flux barrier hole 323 is substantially triangular and is constant in the direction of the central axis J1.

  At the end of the magnet holding hole 321 on the flux barrier hole 323 side, a gap 324 is provided that widens from the side surface 332 of the field magnet 33 held in the magnet holding hole 321 toward the adjacent flux barrier hole 323. In addition, at the end of the magnet holding hole 321 opposite to the flux barrier hole 323 (that is, the end of the two adjacent field magnets 33 arranged in the same polarity on the side facing each other), the magnet holding hole 321. A gap 325 is provided between the inner side surface of the magnet and the side surface 332 of the field magnet 33 held in the magnet holding hole 321.

  Each of the gap 324 and the gap 325 faces approximately half of the two side surfaces 332 substantially perpendicular to the main surface 331 of the field magnet 33. The other half of each side surface 332 of the field magnet 33 is in contact with the inner surface of the magnet holding hole 321, thereby restricting the circumferential movement of the field magnet 33 in the magnet holding hole 321. The

  The substantially triangular cross section of each flux barrier hole 323 is substantially parallel to the side substantially parallel to the outer peripheral surface of the rotor core 32 and the side surfaces 332 facing each other of the two field magnets 33 adjacent to each flux barrier hole 323. Have two sides. The shortest distance D1 between each flux barrier hole 323 and the outer peripheral surface of the rotor core 32, and the shortest distance D2 between the two magnet holding holes 321 adjacent to each flux barrier hole 323 and each flux barrier hole 323. , D3 are made equal.

  As shown in FIG. 2, the bearing mechanism 4 accommodates the upper bearing 41 and the lower bearing 42 attached to the shaft 31 on the upper side and the lower side of the rotor core 32 of the rotor portion 3, and the upper bearing 41 and is accommodated in the housing 6. A bearing holder 43 to be fixed is provided. The lower bearing 42 is accommodated in an accommodating portion having a cylindrical side wall provided in the center of the bottom of the housing 6.

  Next, the flow of manufacturing the motor 1 will be described. FIG. 9 is a diagram showing a flow of manufacturing the motor 1. FIG. A to FIG. FIG. 11C is a front view showing the motor 1 being manufactured, and FIG. A and FIG. B is a plan view showing the motor 1 being manufactured.

  When the motor 1 is manufactured, first, an insulator formed of an insulator such as a resin is inserted and attached to the stator core 211 from both sides of the stator core 211 shown in FIG. Side surfaces and upper and lower surfaces of the plurality of teeth 2111 and upper and lower surfaces of the core back 2112 are covered with an insulator. Subsequently, two straight portions 2121 (see FIGS. 5.A and 5.B) of the plurality of conducting wires 212 are inserted into the plurality of slots 2113 of the stator core 211 from the lower side of the stator core 211, as shown in FIG. As shown, the end 2123 of each conducting wire 212 protrudes upward from the stator core 211 (step S11). At both ends 2123 of each conductive wire 212, a film of an insulator (for example, polyimide amide) having a thickness of several μm covering the surface of the conductive wire 212 is removed in advance to expose the conductor on the side surface. Is a joint part joined to the joint part 2132a (see FIGS. 7.A to 7.F) of the bus bar 2132 which is a conductor.

  When the insertion of the conducting wire 212 is completed, FIG. A bus bar plate 2131a shown in FIG. As shown to A, it arrange | positions at the upper side (namely, the edge part 2123 side of the some conducting wire 212) of the stator core 211 (step S12), FIG. As shown to A, the edge part 2123 of some conductors 212 (namely, conductor group joined to the bus-bar plate 2131a) to the junction part 2132a of the some bus-bar 2132 of the bus-bar plate 2131a (refer FIG. 10.A) ) Are respectively fitted. Then, TIG welding is performed on each combination of the joint 2132a of the bus bar 2132 and the end 2123 of the conductor 212, and the plurality of bus bars 2132 of the bus bar plate 2131a and a part of the plurality of conductors 212 are joined ( Step S13).

  Next, FIG. The bus bar plate 2131b shown in FIG. As shown in FIG. 11B, it is overlaid on the bus bar plate 2131a disposed on the stator core 211 (step S14). As shown in B, a part of the plurality of conductors 212 (that is, a conductor group joined to the bus bar plate 2131b) is fitted into the joints 2132a of the plurality of bus bars 2132 of the bus bar plate 2131b. The plurality of bus bars 2132 of the bus bar plate 2131b are arranged on the opposite side to the stator core 211 of the plurality of bus bars 2132 of the bus bar plate 2131a so as to overlap a part of the plurality of bus bars 2132 of the bus bar plate 2131a with respect to the central axis J1 direction. .

  Here, the bus bar 2131a and the plurality of bus bars 2132 of the bus bar plate 2131a are regarded as the first terminal block and the first terminal, and the plurality of bus bars 2132 of the bus bar plate 2131b and the bus bar plate 2131b are regarded as the second terminal block and the second terminal. In this case, in the motor 1, the second terminal block is overlaid on the first terminal block, and the plurality of second terminals overlaps a part of the plurality of first terminals in the direction of the central axis J1.

  In the bus bar plate 2131b, similarly to the joining of the bus bar plate 2131a, TIG welding is performed on each combination of the joining portion 2132a of the bus bar 2132 and the end portion 2123 of the conducting wire 212, and a plurality of bus bars 2132 of the bus bar plate 2131b and the plurality of bus bars 2132b are joined. Part of the conducting wire 212 is joined (step S15).

  Similarly, until all the bus bar plates 2131 are joined to the conductors 212 (step S16), the next bus bar plate 2131 is overlaid on the joined bus bar plate 2131 and the bus bars 2132 of the bus bar plate 2131 and a plurality of conductors. The process of joining a part of 212 by TIG welding is repeated (steps S14 to S16), and FIG. As shown in C, the armature 21 having the bus bar unit 213 (that is, six bus bar plates 2131 stacked on the stator core 211) is formed. In the bus bar unit 213, a plurality of bus bars 2132 (see FIGS. 7A to 7F) of each bus bar plate 2131 overlap a part of the plurality of bus bars 2132 of other bus bar plates 2131 in the direction of the central axis J1.

  When all (six in this embodiment) bus bar plates 2131 are joined to the conductors 212 and the armature 21 is manufactured, the armature 21 is placed on the heated housing 6 (see FIG. 2). The armature 21 is inserted from the bent portion 2122 side of the plurality of conducting wires 212 and fixed inside the housing 6 by shrink fitting (step S17). Subsequently, a substantially annular plate-shaped coil cover is attached to the inside of the housing 6, and the upper side of the bus bar unit 213 of the armature 21 is covered.

  Next, the rotor part 3 shown in FIG. 2 and the upper bearing 41 and the lower bearing 42 attached to the shaft 31 of the rotor part 3 are located inside the armature 21 inside the housing 6 (that is, on the central axis J1 side). Inserted (step S18). The assembly of the rotor part 3 and the attachment of the upper bearing 41 and the lower bearing 42 to the shaft 31 are performed before the assembly of the armature 21 independently of the assembly of the armature 21 (steps S11 to S16). Or afterwards or in parallel with the assembly of the armature 21.

  When the rotor portion 3 is inserted inside the armature 21, the bearing holder 43 is fixed to the housing 6 on the upper side of the armature 21 (that is, the opening side of the housing 6) (step S19). When the resolver unit 5 is fixed to the housing 6 on the upper side, the manufacture of the motor 1 is completed (step S20).

  As described above, in the armature 21 of the motor 1, a part of the plurality of conductors 212 is connected to one bus bar plate 2131a, and the plurality of conductors 212 is connected to the bus bar plate 2131b stacked on the bus bar plate 2131a. The other part is connected. The bus bar plates 2131c to 2131f are sequentially stacked on the bus bar plate 2131b, and a coil 214 is formed by sequentially connecting a part of the plurality of conductive wires 212 to each bus bar plate 2131.

  In this way, by joining the lead wires 212 to the plurality of bus bars 2132 integrally held by one bus bar plate 2131, compared with the case where a plurality of independent bus bars are joined to the lead wires one by one, The plurality of conductors 212 of the child 21 can be easily connected via the bus bar 2132, and the coil 214 can be easily formed. As a result, the manufacturing of the motor 1 can be simplified.

  Further, by joining the plurality of conductive wires 212 to the plurality of stacked bus bar plates 2131, the number of joint portions 2132a of the bus bars 2132 in each bus bar plate 2131 can be reduced. Thereby, it is possible to suppress an increase in the diameter of the ring-shaped bus bar plate 2131 while maintaining the interval between the joint portions 2132a at such a size that the conductor 212 and the bus bar 2132 can be joined. As a result, an increase in the diameter of the motor 1 can be prevented.

  A motor used as a compressor for a vehicle air conditioner is required to be small and easy to manufacture from the viewpoints of securing a space in the vehicle, improving fuel consumption, and reducing the manufacturing cost of the motor. Since the motor 1 according to the present embodiment can be simplified in production while preventing an increase in diameter as described above, it can be particularly preferably used as a compressor for a vehicle air conditioner. In addition, as a compressor for a vehicle air conditioner, an IPM (interior permanent magnet) in which a permanent magnet is embedded in a rotor core disposed inside an armature from the viewpoint of improving safety and reducing thermal demagnetization. Magnet)) A motor is used, and the structure of the motor 1 is preferably applied to such an IPM motor.

  In the manufacture of the armature 21, the plurality of bus bar plates 2131 are sequentially stacked on the other bus bar plate 2131 and connected to the conductors 212 to connect the plurality of conductors 212 of the armature 21. Can be performed more easily, and the increase in the diameter of the bus bar plate 2131 can be suppressed, and the increase in the size of the motor 1 can be prevented more reliably. Moreover, since the joining work (namely, connection work) of the conducting wire 212 and the bus bar 2132 can be performed only from the upper side of the stator core 211 (that is, only in one direction along the central axis J1 with respect to the stator core 211), the connection of the conducting wire 212 can be performed. Furthermore, it can carry out easily and efficiently.

  Further, the plurality of bus bars 2132 of each bus bar plate 2131 are arranged so as to overlap with a part of the plurality of bus bars 2132 of the other bus bar plates 2131 in the direction of the central axis J1, so that the circumference centering on the central axis J1. The degree of freedom of arrangement of the bus bars 2132 in the direction can be improved. As a result, the interval between the joint portions 2132a of the bus bar 2132 can be increased, and the connection work of the conducting wires 212 can be facilitated.

  In the armature 21, each bus bar plate 2131 is formed in a substantially annular shape centered on the central axis J <b> 1, whereby a plurality of bus bars 2132 can be efficiently arranged around the central axis J <b> 1. Can be prevented more reliably. In the armature 21, each bus bar plate 2131 may have a substantially arc shape centered on the central axis J1. Also in this case, the plurality of bus bars 2132 can be efficiently arranged around the central axis J1, and the enlargement of the motor 1 can be reliably prevented.

  In each bus bar plate 2131 of the armature 21, the joint portion 2132 a of the bus bar 2132 is arranged closer to the central axis J <b> 1 than the outer peripheral edge of the stator core 211. Thereby, the diameter of the bus bar unit 213 is prevented from becoming larger than the diameter of the stator core 211, and the enlargement of the motor 1 can be further reliably prevented.

  In each bus bar plate 2131, the plurality of bus bars 2132 are fixed to the inner side of the outer peripheral edge of the bus bar holder 2133, thereby preventing the joint between the bus bar 2132 and the conductor 212 from being exposed to the outside of the bus bar holder 2133. . As a result, the reliability of joining the bus bar 2132 and the conductive wire 212 can be improved, and the reliability of the motor 1 can be improved. In addition, by joining the bus bar 2132 and the conductor 212 by welding, the conductor 212 and the bus bar 2132 can be firmly joined, and the reliability of the armature 21 and the motor 1 can be further improved.

  In the motor 1, when the coil 214 is formed by using a U-shaped conducting wire 212 having two straight portions 2121 to form a coil by using a linear (that is, I-shaped) conducting wire. In comparison, the number of times of joining the bus bar 2132 and the conductor 212 can be reduced, and the conductor 212 before joining the bus bar 2132 can be easily held in a state of being inserted into the slot 2113. As a result, the armature 21 and the motor 1 can be easily manufactured.

The structure of the armature 21 that forms the coil 214 by connecting the conductive wires 212 via the plurality of stacked bus bar plates 2131 is a conductive wire that is difficult to be wound around the teeth 2111 (for example, a rectangular shape with a rectangular cross-sectional shape). This is particularly suitable when the coil 214 is formed by the conducting wire 212a (particularly, the rectangular conducting wire 212a having a cross-sectional area of 12.3 mm ² or more) or the round conducting wire 212b having a cross-sectional diameter of 3.16 mm or more.

  Next, a motor according to a second embodiment of the present invention will be described. FIG. 12 is a front view showing the armature 21a of the motor according to the second embodiment. As shown in FIG. 12, in the armature 21a, FIG. A thru | or FIG. Instead of the bus bar plates 2131a to 2131f shown in F, six bus bar plates 2131p to 2131u are stacked on the stator core 211. Other configurations of the motor according to the second embodiment are shown in FIGS. This is the same as B, and the same reference numerals are given in the following description. Further, the flow of manufacturing the motor is the same as that of the first embodiment.

  FIG. A and FIG. B is a plan view showing the first and fourth bus bar plates 2131p and 2131s from the lower side in FIG. 12 (that is, the side closer to the stator core 211). In the armature 21a, the second and third busbar plates 2131q and 2131r from the lower side in FIG. 12 have substantially the same shape as the first busbar plate 2131p, and the fifth and sixth layers. The bus bar plates 2131t and 2131u have substantially the same shape as the fourth-layer bus bar plate 2131s.

  FIG. As shown in A, the bus bar plates 2131p (˜2131r) of the armature 21a have a plurality (eight in the present embodiment) of bus bars 2132 arranged in the circumferential direction at the same position with respect to the central axis J1 direction, and The bus bar holder 2133 which is an insulating terminal holding portion to which the plurality of bus bars 2132 are integrally fixed is provided. The bus bar holder 2133 is a substantially annular inner holding portion 2134 centered on the central axis J1 and a substantially annular shape centered on the central axis J1 and outside the inner holding portion 2134 (that is, opposite to the central axis J1). ), And a connecting portion 2136 for connecting the inner holding portion 2134 and the outer holding portion 2135 arranged concentrically.

  The inner holding portion 2134 holds a part of the plurality of bus bars 2132 (four bus bars 2132 in this embodiment) on the side facing the outer holding portion 2135 (that is, the side opposite to the central axis J1). The outer holding portion 2135 holds the bus bar 2132 not held by the inner holding portion 2134 on the side facing the inner holding portion 2134 (that is, the central axis J1 side). In the armature 21a, the outer holding portion 2135 overlaps the entire inner holding portion 2134 in the radial direction centered on the central axis J1.

  FIG. As shown in B, the bus bar plates 2131s (˜2131u) of the armature 21a have a plurality (eight in the present embodiment) of bus bars 2132 arranged in the circumferential direction at the same position with respect to the central axis J1 direction, and The bus bar 2132 is provided with a bus bar holder 2133 which is an insulating terminal holding part integrally fixed to the outside (that is, the side opposite to the central axis J1). As shown in FIG. 12, the bus bar plate 2131p Overlaid on ~ 2131r. The conducting wire 212 connected to the bus bar plates 2131s (˜2131u) passes between the inner holding portion 2134 and the outer holding portion 2135 of the bus bar plates 2131p to 2131r. Here, when the bus bar plates 2131p to 2131r are regarded as the first terminal blocks and the bus bar plates 2131s to 2131u are regarded as the second terminal blocks, in the armature 21a, the second terminal blocks are stacked on the plurality of first terminal blocks. The conductive wire 212 connected to the second terminal block passes between the inner holding portion 2134 and the outer holding portion 2135 of the first terminal block.

  In the armature 21a, as in the first embodiment, the bus bar plates 2131p to 2131u are sequentially stacked on the stator core 211, and a part of the plurality of conductors 212 is sequentially connected to each bus bar plate 2131, thereby the coil 214. (See FIG. 2) is formed. Thereby, a plurality of conducting wires 212 can be easily connected via the bus bar 2132 while preventing an increase in the diameter of the motor.

  In the armature 21a, in particular, in the first to third bus bar plates 2131p to 2131r, inner holding portions 2134 on the inner side and outer side of the conductor 212 connected to the fourth to sixth bus bar plates 2131s to 2131u. The outer holding portion 2135 is provided, and the bus bar 2132 is fixed to both the inner holding portion 2134 and the outer holding portion 2135. Thereby, the several bus-bar 2132 can be efficiently arrange | positioned around the central axis J1, and the enlargement of the diameter of a motor can be prevented more reliably.

  In the armature 21a, each of the inner holding portions 2134 and the outer holding portions 2135 of the bus bar plates 2131p to 2131r has a substantially annular shape with the central axis J1 as the center, so that in the circumferential direction with the central axis J1 as the center. Since the plurality of bus bars 2132 can be arranged more efficiently, an increase in the diameter of the motor can be prevented more reliably. In the bus bar plates 2131p to 2131r, if the outer holding portion 2135 overlaps at least a part of the inner holding portion 2134, either or both of the inner holding portion 2134 and the outer holding portion 2135 have the center axis J1. The center may be a substantially arc shape. Even in this case, the plurality of bus bars 2132 can be efficiently arranged, and an increase in the diameter of the motor can be prevented.

  Next, another example of joining the rectangular conducting wire 212a and the bus bar 2132 will be described. FIG. 14 is an enlarged perspective view showing a part of a rectangular conducting wire 212a having a different shape from the first and second embodiments. In FIG. 14, only the vicinity of one end 2123 of the rectangular conducting wire 212a is shown. Show. The shape in the vicinity of the other end 2123 of the rectangular conducting wire 212a is the same as the shape shown in FIG.

  As shown in FIG. 14, each of the two end portions 2123 of the rectangular conducting wire 212a includes a substantially cylindrical portion (that is, the cross-sectional shape is circular) with the conductor exposed on the side surface. It joins to the bus bar 2132 (refer FIG. 7.A thru | or FIG. 7.F) of the bus-bar plate 2131 by TIG welding. In the following description, the part 2126 used for joining to the bus bar 2132 is referred to as a “joining end 2126”.

  In the following description, a portion 2127 other than the joining end portion 2126 of the rectangular conducting wire 212a (that is, a portion having a rectangular cross-sectional shape) is referred to as a “square wire portion 2127”. The side surface of the rectangular wire portion 2127 is covered with an insulating film. In the rectangular conductor 212a, as shown in FIG. 14, one joint end 2126 protrudes from the inner side of the outer peripheral edge of one end surface 2128 of the square wire 2127, and is similar to the joint end 2126. One joining end portion is provided on the end surface opposite to the end surface 2128 of the rectangular wire portion 2127 in FIG.

  Each joint end portion 2126 has a truncated cone shape whose diameter gradually decreases as it goes away from the end face 2128 on the joint end portion 2126 side of the square wire portion 2127, and the outer peripheral edge on the square wire portion 2127 side of the joint end portion 2126 has a square shape. It is located inside the outer peripheral edge of the line portion 2127. Accordingly, at any position in the extending direction of the joining end portion 2126, the cross section perpendicular to the extending direction of the joining end portion 2126 (circular cross section) is more than the cross section perpendicular to the extending direction of the rectangular wire portion 2127 (rectangular cross section). Get smaller. The joint end 2126 has a rectangular cross-sectional shape (that is, a cross-section having the same shape as that of the square wire portion 2127), and the end of the joining end portion 2126 is cut together with an insulating film covering the side surface of the end portion. It is formed by removing the corners of the part.

  When a motor is manufactured using the rectangular conducting wire 212a shown in FIG. 14, six bus bar plates 2131 (see FIG. 2) are sequentially stacked on the stator core 211 in the same manner as in the first embodiment. A coil 214 is formed by sequentially connecting a part of the plurality of conductive wires 212 to the bus bar plate 2131. Thereby, a plurality of conducting wires 212 can be easily connected via the bus bar 2132 while preventing an increase in the diameter of the motor.

  When the rectangular conductor 212a and the bus bar 2132 are joined in the manufacture of the motor, as shown in FIG. 15, the inner side surface 2132c formed on the joint 2132a of the bus bar 2132 has a part of a cylindrical surface. The joining end portion 2126 of the rectangular conducting wire 212a is inserted into the 2132b, and the portion around the notch portion 2132b of the bus bar 2132 (that is, the joining portion 2132a) abuts the end surface 2128 of the square wire portion 2127 on the joining end portion 2126 side. In this state, TIG welding is performed on the joining end 2126 of the rectangular conductor 212a and the joining 2132a of the bus bar 2132.

  Thus, when the rectangular conductor 212a and the bus bar 2132 are joined, the bus bar 2132 abuts against the end surface 2128 of the rectangular wire portion 2127, whereby the bus bar 2132 can be easily positioned with respect to the rectangular conductor 212a, and the rectangular conductor 212a. And the bus bar 2132 can be easily joined. Further, by positioning the bus bar plate 2131 with respect to the stator core 211, the height of the bent portion 2122 of the rectangular conducting wire 212a from the stator core 211 can be easily determined (that is, the stator core of the bent portion 2122 of the rectangular conducting wire 212a). Positioning with respect to 211 can be easily performed.)

  Furthermore, a part of the inner side surface 2132c of the notch 2132b of the bus bar 2132 is a part of a cylindrical surface having a constant diameter, and the joining end 2126 of the rectangular conductor 212a is formed into a truncated cone shape. When the joining end 2126 is inserted into the portion 2132b, a gap is generated between the inner surface 2132c of the notch 2132b and the joining end 2126. As a result, since the welding material (for example, a part of the welding rod or the joining end 2126) flows into the gap when the rectangular conducting wire 212a and the bus bar 2132 are joined, the rectangular conducting wire 212a and the bus bar 2132 can be joined firmly. it can.

  As mentioned above, although embodiment of this invention has been described, this invention is not limited to the said embodiment, A various change is possible.

  In the motors according to the first and second embodiments, the plurality of conductors 212 forming the armature coil 214 do not necessarily have both the rectangular conductor 212a and the round conductor 212b, but only the rectangular conductor 212a. Alternatively, only the round conductor 212b may be connected by the bus bar 2132 to form the coil 214.

  In the motor according to the second embodiment, the inner holding portion 2134 and the outer holding portion 2135 of the bus bar plates 2131p to 2131r are not necessarily connected by the connecting portion 2136. Further, the shapes of the inner holding portion 2134 and the outer holding portion 2135 are not necessarily limited to a substantially annular shape or a substantially arc shape, and may be various other shapes.

  The joining end 2126 of the rectangular conducting wire 212a shown in FIG. 14 is not necessarily limited to a truncated cone shape, and may be a cylindrical shape having a constant cross-sectional diameter, for example. In this case, the inner surface 2132c of the notch 2132b formed in the joint portion 2132a of the bus bar 2132 is a tapered surface (that is, the diameter of the inner surface 2132c of the notch 2132b is increased as the distance from the end surface 2128 of the rectangular wire portion 2127 increases). By doing so, a gap into which the welding material flows is formed between the joining end portion 2126 and the inner side surface 2132c of the notch portion 2132b, and the joining between the rectangular conducting wire 212a and the bus bar 2132 can be strengthened.

  In the bus bar unit 213 of the motor according to the above embodiment, a plurality of mutually independent substantially arc-shaped members may be handled as one substantially annular bus bar plate 2131. Further, the shape of each bus bar plate 2131 is not necessarily limited to a substantially annular shape or a substantially arc shape, and may be various other shapes.

  In the bus bar unit 213, at least one bus bar 2132 overlaps a part of the plurality of bus bars 2132 of the other bus bar plate 2131 other than the bus bar plate 2131 including the bus bar 2132 with respect to the central axis J <b> 1 direction. The degree of freedom of the arrangement of the lead wires 212 can be improved, and the connection work of the conducting wires 212 can be made easier. Further, if the number of bus bar plates 2131 is two or more, the number may be appropriately changed according to the number of conductive wires 212 forming the coil 214.

  In the manufacture of the motor according to the above embodiment, the joining of the conductive wire 212 and the bus bar 2132 is not necessarily performed by TIG welding, and may be performed by other welding methods, silver brazing, caulking, or the like. .

  In the motor armature, the coil 214 is not necessarily distributed. Further, when it is difficult to form the bent portion 2122 for making the conducting wire 212 U-shaped, a straight rectangular conducting wire or a linear round conducting wire is connected by the bus bar unit 213 above and below the stator core 211. Thus, a coil may be formed.

  The motor according to the above embodiment is not necessarily an inner rotor type in which the field magnet 33 is disposed inside the armature, and is an outer rotor type in which the field magnet 33 is disposed outside the armature. It may be. In addition to the compressor of the vehicle air conditioner, the motor is a drive source for vehicles such as so-called hybrid cars (that is, vehicles driven by both an internal combustion engine such as a gasoline engine and a diesel engine and an electric motor) and electric vehicles. In addition, it may be used as various devices and their drive sources.

It is a top view of the motor concerning a 1st embodiment. It is a longitudinal cross-sectional view of a motor. It is a top view of a stator core. It is a perspective view of a stator core and a conducting wire. It is a perspective view of a rectangular conducting wire. It is a perspective view of a round-shaped conducting wire. It is sectional drawing of a stator core and conducting wire. It is a figure which expands and shows one slot. It is a top view of a bus-bar plate. It is a top view of a bus-bar plate. It is a top view of a bus-bar plate. It is a top view of a bus-bar plate. It is a top view of a bus-bar plate. It is a top view of a bus-bar plate. It is a top view of a rotor core and a field magnet. It is a figure which expands and shows the flux barrier hole vicinity. It is a figure which shows the flow of manufacture of a motor. It is a front view which shows the motor in the middle of manufacture. It is a front view which shows the motor in the middle of manufacture. It is a front view which shows the motor in the middle of manufacture. It is a top view which shows the motor in the middle of manufacture. It is a top view which shows the motor in the middle of manufacture. It is a front view of the armature of the motor which concerns on 2nd Embodiment. It is a top view of a bus-bar plate. It is a top view of a bus-bar plate. It is a perspective view which expands and shows a part of square-shaped conducting wire. It is a perspective view of a square conducting wire and a bus bar.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motor 2 Stator part 3 Rotor part 4 Bearing mechanism 21,21a Armature 33 Field magnet 211 Stator core 212 Conductor 212a Rectangular conductor 212b Round conductor 2111 Teeth 2113 Slot 2121 Linear part 2122 Bending part 2123 End part 2126 Joint end part 2127 Square wire part 2128 End face 2131, 2131a to 2131f, 2131p to 2131u Bus bar plate 2132 Bus bar 2132a Joint part 2133 Bus bar holder 2134 Inner holding part 2135 Outer holding part J1 Central axis S11 to S20 Step

Claims (18)

An electric motor,
A stator portion having an armature;
A bearing mechanism attached to the stator portion;
A field magnet that generates torque centered on a predetermined central axis with the armature is provided, and is supported rotatably with respect to the stator portion about the central axis via the bearing mechanism. The rotor part,
With
The armature is
A stator core having a plurality of teeth arranged radially about the central axis;
A plurality of conductors including a portion extending in parallel to the central axis in a plurality of slots between the plurality of teeth;
A first terminal block disposed on one side of the stator core in the central axis direction and having a plurality of first terminals connected to a part of the plurality of conducting wires fixed to an insulator;
A second terminal block overlaid on the first terminal block and connected to a part of the plurality of conducting wires, the second terminal block fixed to an insulator;
A motor comprising: The motor according to claim 1,
The motor according to claim 1, wherein the first terminal block and the second terminal block have a substantially annular shape or a substantially arc shape with the central axis as a center. The motor according to claim 2,
The plurality of first terminals are fixed inside the outer peripheral edge of the insulator of the first terminal block,
The motor, wherein the plurality of second terminals are fixed inside an outer peripheral edge of the insulator of the second terminal block. The motor according to any one of claims 1 to 3,
The insulator of the first terminal block is:
An inner holding part for holding a part of the plurality of first terminals;
An outer holding part that is disposed on the opposite side of the inner holding part from the central axis and holds a part of the plurality of first terminals;
With
The motor characterized in that a conducting wire connected to the second terminal block passes between the inner holding part and the outer holding part. The motor according to claim 4,
The motor according to claim 1, wherein the inner holding portion and the outer holding portion are substantially annular or arc-shaped with the central axis as a center. The motor according to any one of claims 1 to 5,
The field magnet is disposed on the central axis side of the annular armature centered on the central axis;
The motor is characterized in that the joint portions of the plurality of first terminals with the lead wires and the joint portions of the plurality of second terminals with the lead wires are disposed closer to the central axis than the outer peripheral edge of the stator core. The motor according to any one of claims 1 to 6,
One of the second terminals overlaps with a part of the plurality of first terminals in the central axis direction. The motor according to any one of claims 1 to 7,
Each of the plurality of conductors is
Two straight portions extending in parallel to the central axis respectively accommodated in two slots;
A bent portion that integrally connects the two straight portions on the other side in the central axis direction of the stator core while bending between one end portions of the two straight portions;
A motor comprising: The motor according to claim 8,
2. The motor according to claim 1, wherein the plurality of conductors include round conductors having a circular cross section having a diameter of 3.16 mm or more. The motor according to claim 8 or 9, wherein
The motor according to claim 1, wherein the plurality of conducting wires have rectangular conducting wires having a rectangular cross-sectional shape. The motor according to claim 10,
A motor characterized in that a cross-sectional area of the rectangular conducting wire is 12.3 mm ² or more. The motor according to claim 10 or 11,
The end joined to the first terminal or the second terminal of the rectangular conducting wire comprises a substantially cylindrical joining end with a conductor exposed on the side surface,
The cross section of the joint end is a circle smaller than the cross section of the square wire portion of the square conducting wire, and when the joint end and the first terminal or the second terminal are joined, The motor according to claim 1, wherein the first terminal or the second terminal is in contact with an end face on the joining end side. The motor according to claim 12, wherein
The joint end has a truncated conical shape in which an outer diameter gradually decreases as it is away from the end face on the joint end side of the rectangular wire part, and an outer peripheral edge on the square line part side of the joint end part is The motor is located inside an outer peripheral edge of the rectangular wire portion on the joining end side. A method for manufacturing an armature of an electric motor,
a) inserting a plurality of conducting wires including portions extending in parallel with the central axis into a plurality of slots between the plurality of teeth of a stator core having a plurality of teeth arranged radially around a predetermined central axis; ,
b) disposing a first terminal block having a plurality of first terminals fixed to an insulator on one side in the central axis direction of the stator core;
c) bonding the plurality of first terminals to a part of the plurality of conductors;
d) superimposing a second terminal block having a plurality of second terminals fixed to an insulator on the first terminal block;
e) joining the plurality of second terminals to some of the plurality of conductors;
A method of manufacturing an armature, comprising: The method for manufacturing an armature according to claim 14,
The armature manufacturing method, wherein the first terminal block and the second terminal block have a substantially annular shape or a substantially arc shape centered on the central axis. A method of manufacturing an armature according to claim 14 or 15,
Each of the plurality of conductors is
Two straight portions extending in parallel to the central axis respectively accommodated in two slots;
A bent portion that integrally connects the two straight portions on the other side in the central axis direction of the stator core while bending between one end portions of the two straight portions;
A method of manufacturing an armature, comprising: A method for manufacturing an armature according to any one of claims 14 to 16,
A method of manufacturing an armature, characterized in that joining of the conducting wire, the plurality of first terminals, and the plurality of second terminals in the step c) and the step e) is performed by welding. A method for manufacturing an armature according to any one of claims 14 to 17,
A method of manufacturing an armature, wherein one second terminal overlaps a part of the plurality of first terminals in the central axis direction.

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