JP2004312801A - Structure of stator of multiple shaft multilayer motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of a stator of a multiple shaft multilayer motor which can improve the efficiency of the motor by cutting off loop current flowing through bolts and the positioning members of stator tees. <P>SOLUTION: The multiple shaft multilayer motor M includes an inner rotor IR and an outer rotor OR disposed in a concentric disc shape via the stator S so that the stator S has a plurality of the stator teeth 41 with coils 42 in which the coils 42 are wound on the stator teeth 41 each composed of a laminated steel sheet, bolts 44 and nuts 45 for holding and clamping the positioning members disposed at both ends of the divided stator tees 41 with the coils 42. In the multiple shaft multilayer motor M, the nuts, the bolt heads, and insulating washer members 57, in which an insulating material is interposed at least partly, as the washers provided between both the end plates 47 and 49 as the positioning members, are used. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention belongs to the technical field of a stator structure of a multi-axis multilayer motor applied to a hybrid drive unit or the like.
[0002]
[Prior art]
Conventionally, a stator of a multi-axis multi-layer motor in which an inner rotor and an outer rotor are arranged concentrically with a stator interposed therebetween has a plurality of coiled stator teeth in which coils are wound around stator teeth formed of laminated steel plates. And a bolt and a nut that sandwich and fix positioning members (end plates with positioning pins) disposed at both ends of the divided stator teeth with coils (for example, Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2001-169483.
[0004]
[Problems to be solved by the invention]
However, in the conventional multi-axis multi-layer motor, since the washer of the bolt and nut for sandwiching and fixing the positioning members disposed at both ends of the divided stator toothed coil is formed of a non-insulating material, A loop current is generated through the bracket member and the bolt that hold both ends of the motor, and the efficiency of the motor deteriorates.
[0005]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a stator structure of a multi-axis multilayer motor that can improve motor efficiency by interrupting a loop current flowing through a positioning member of a bolt and a stator tooth. And
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, in the present invention,
An inner rotor and an outer rotor are arranged concentrically with a stator interposed therebetween, and the stator is a multi-shaft multi-layer motor having a bolt and a nut that sandwiches and fixes positioning members disposed at both ends of a split stator tooth with a coil. As the washer provided between the bolt / nut and the positioning member, an insulating washer member having an insulating material interposed at least partially is used.
[0007]
【The invention's effect】
Therefore, in the stator structure of the multi-axis multilayer motor of the present invention, since the insulating washer member is interposed between the bolt and nut and the positioning member, the loop current flowing through the bolt and the positioning member of the stator teeth is interrupted, The motor efficiency can be improved by interrupting the loop current.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments for realizing a stator structure of a multi-axis multilayer motor of the present invention will be described based on first to fourth examples shown in the drawings.
[0009]
(First embodiment)
First, the configuration will be described.
[0010]
[Overall configuration of hybrid drive unit]
FIG. 1 is an overall view of a hybrid drive unit to which the multi-shaft multi-layer motor of the first embodiment is applied. In FIG. 1, E is an engine, M is a multi-shaft multi-layer motor, G is a Ravigneaux type compound planetary gear train, D Denotes a drive output mechanism, 1 denotes a motor cover, 2 denotes a motor case, 3 denotes a gear housing, and 4 denotes a front cover.
[0011]
The engine E is a main power source of the hybrid drive unit. The engine output shaft 5 is connected to the second ring gear R2 of the Ravigneaux-type compound planetary gear train G via a rotation fluctuation absorbing damper 6 and a multi-plate clutch 7. ing.
[0012]
The multi-shaft multi-layer motor M is a single motor in appearance, but is a sub power source having two motor generator functions. The multi-axis multi-layer motor M is fixed to the motor case 2 and has a stator S as a fixed armature wound with a coil, an inner rotor IR disposed inside the stator S and having a permanent magnet embedded therein, The outer rotor OR having the permanent magnets embedded therein is disposed outside of the outer rotor S and coaxially arranged in three layers. A first motor hollow shaft 8 fixed to the inner rotor IR is connected to a first sun gear S1 of the Ravigneaux-type compound planetary gear train G, and a second motor shaft 9 fixed to the outer rotor OR is a Ravigneaux-type compound planetary gear. It is connected to the second sun gear S2 in the row G.
[0013]
The Ravigneaux type compound planetary gear train G is a hybrid transmission having a continuously variable transmission function of changing the speed ratio steplessly by controlling two motor rotation speeds. The Ravigneaux type compound planetary gear train G includes a common carrier C that supports a first pinion P1 and a second pinion P2 that mesh with each other, a first sun gear S1 that meshes with the first pinion P1, and a second sun gear that meshes with the second pinion P2. S2, a first ring gear R1 that meshes with the first pinion P1, and a second ring gear R2 that meshes with the second pinion P2. A multiple disc brake 10 is interposed between the first ring gear R1 and the gear housing 3. An output gear 11 is connected to the common carrier C.
[0014]
The drive output mechanism D includes an output gear 11, a first counter gear 12, a second counter gear 13, a drive gear 14, a differential 15, and drive shafts 16L and 16R. The output rotation and output torque from the output gear 11 pass through the first counter gear 12, the second counter gear 13, the drive gear 14, and the differential 15, and are transmitted from the drive shafts 16L, 16R to drive wheels (not shown). You.
[0015]
That is, the hybrid drive unit connects the second ring gear R2 and the engine output shaft 5 via the multi-plate clutch 7, connects the first sun gear S1 and the first motor hollow shaft 8, and connects the second sun gear S2 And the second motor shaft 9 and an output gear 11 to the common carrier C.
[0016]
[Configuration of hybrid transmission]
FIG. 2 is a longitudinal sectional view showing the hybrid transmission. In FIG. 2, reference numeral 2 denotes a motor case, 3 denotes a gear housing, and 4 denotes a front cover. A Ravigneaux type compound planetary gear train G and a drive output mechanism D are arranged in a gear chamber 30 surrounded by these.
[0017]
The second ring gear R2 of the Ravigneaux type compound planetary gear train G is rotationally driven from the engine E when the multi-plate clutch 7 is engaged through the rotation fluctuation absorbing flywheel damper 6, the transmission input shaft 31, and the clutch drum 32. Torque is input.
[0018]
A first motor hollow shaft 8 is spline-coupled to a first sun gear S1 of the Ravigneaux type compound planetary gear train G, and a first torque and a first torque are transmitted from an inner rotor IR of the multi-shaft multilayer motor M according to a determined motor operating point. The first rotation speed is input.
[0019]
A second motor shaft 9 is spline-coupled to the second sun gear S2 of the Ravigneaux type compound planetary gear train G, and a second torque and a second torque are transmitted from the outer rotor OR of the multi-shaft multilayer motor M according to a determined motor operating point. Two revolutions are input.
[0020]
A multi-plate brake 10 is provided between the first ring gear R1 of the Ravigneaux-type compound planetary gear train G and the gear housing 3, and when the multi-plate brake 10 is fastened at the time of starting or the like, the first ring gear R1 is turned off. Stop.
[0021]
An output gear 11 rotatably supported on a stator shaft 48 via a bearing is spline-coupled to a common carrier C of the Ravigneaux type compound planetary gear train G.
[0022]
The drive output mechanism D includes a first counter gear 12 meshing with the output gear 11, a second counter gear 13 provided on a shaft portion of the first counter gear 12, and a drive gear 14 meshing with the second counter gear 13. And The final reduction ratio is determined by the ratio of the number of teeth between the second counter gear 13 and the drive gear 14.
[0023]
An engagement pressure is supplied to a clutch piston 33 of the multi-plate clutch 7 by a clutch pressure oil passage 34 formed in the front cover 4. Further, a fastening pressure is supplied to a brake piston 35 of the multi-plate brake 10 by a brake pressure oil passage 36 formed in the front cover 4. The clutch piston 33 and the brake piston 35 are disposed inside the front cover 4 at an inner peripheral position, and the brake piston 35 is disposed at an outer peripheral position.
[0024]
A shaft oil passage 37 is formed in the transmission input shaft 31, and lubricating oil is supplied to the shaft oil passage 37 via a lubricating oil passage 38 formed in the front cover 4. You.
[0025]
[Configuration of multi-axis multi-layer motor]
FIG. 3 is a longitudinal sectional side view showing a multi-axis multilayer motor M to which the stator structure of the first embodiment is applied, and FIG. 4 is a partially longitudinal front view showing the multi-axis multilayer motor M to which the stator structure of the first embodiment is applied. FIG. 5 and FIG. 5 are views of the stator of the first embodiment viewed from the rear side, and FIG. 6 is an explanatory diagram showing an example of a composite current applied to the stator coil of the multi-axis multilayer motor M. In FIG. 3, reference numeral 1 denotes a motor cover, and 2 denotes a motor case. A multi-axis multilayer motor M including an inner rotor IR, a stator S, and an outer rotor OR is arranged in a motor chamber 17 surrounded by the motor cover. I have.
[0026]
The inner rotor surface of the inner rotor IR is fixed to the stepped shaft end of the first motor hollow shaft 8 by press fitting (or shrink fitting). As shown in FIG. 4, the inner rotor IR has twelve inner rotor magnets 21 buried in the axial direction with respect to the rotor base 20 in consideration of magnetic flux formation. However, two pairs are arranged in a V-shape to show the same polarity, and are three-pole pairs.
[0027]
The stator S includes a stator tooth 41 in which a stator plate 40 made of a steel plate is laminated in the axial direction, a coil 42 wound around the stator tooth 41, a cooling refrigerant passage 43 that passes through the stator S in the axial direction, It has an inner bolt / nut 44, an outer bolt / nut 45, and a resin mold part 46. The front end of the stator S is fixed to the motor case 2 by bolts 87 via the front end plate 47 and the stator shaft 48.
[0028]
The coil 42 has 18 coils and is arranged on the circumference while repeating a six-phase coil three times as shown in FIG. For the six-phase coil 42, an inverter (not shown) passes through a power supply connection terminal 50, a bus bar radial laminate 51, a power supply connector 52, and a bus bar axial laminate 53, for example, as shown in FIG. A composite current is applied. This composite current is a composite of a three-phase AC and a six-phase AC for driving the outer rotor OR and the inner rotor IR.
[0029]
The outer rotor surface of the outer rotor OR is fixed to the outer rotor case 62 by brazing or bonding. A front side connection case 63 is fixed to the front side of the outer rotor case 62, and a rear side connection case 64 is fixed to the back side. The second motor shaft 9 is spline-connected to the rear connection case 64. As shown in FIG. 3, twelve outer rotor magnets 61 are arranged in the outer rotor OR in an axial direction at both end positions via a space in consideration of magnetic flux formation with respect to the rotor base 60. The outer rotor magnet 61 is different from the inner rotor magnet 21 in polarity one by one and forms a six-pole pair.
[0030]
In FIG. 3, reference numerals 80 and 81 denote a pair of outer rotor support bearings that support the outer rotor 6 on the motor case 2 and the motor cover 1. 82 is an inner rotor support bearing for supporting the inner rotor IR on the motor case 2, 83 is a stator support bearing for supporting the stator S with respect to the outer rotor OR, and 84 is between the first motor hollow shaft 8 and the second motor shaft 9. It is an intermediate bearing interposed in. In FIG. 3, reference numeral 85 denotes an inner rotor resolver for detecting the rotational position of the inner rotor IR, and reference numeral 86 denotes an outer rotor resolver for detecting the rotational position of the outer rotor OR.
[0031]
[Stator structure]
FIG. 7 is a sectional view showing a stator structure in the multi-axis multilayer motor M of the first embodiment. In FIG. 7, reference numeral 41 denotes a stator tooth, 43 denotes a refrigerant path, 44 denotes an inner bolt / nut (bolt / nut), 45 is an outer bolt / nut (bolt / nut), 46 is a resin mold part, 47 is a front end plate (positioning member), 49 is a rear end plate (positioning member), 70 is a front bracket, 71 is a rear surface. The side bracket 72 is a stator cooling pipe.
[0032]
The stator teeth 41 are formed by axially laminating a plurality of stator plates 40 made of steel plates. A coil 42 made of a flat copper wire is wound around the outer periphery of the stator teeth 41 so as to reciprocate in the axial direction. A plurality of stator teeth 41 with the coils 42 are prepared.
[0033]
The front side bracket 70 and the rear side bracket 71 are installed at both ends in the axial direction of the stator tooth 41 with the coil 42, and the split stator tooth 41 with the coil 42 is sandwiched by both brackets 70, 71.
[0034]
The front end plate 47 and the rear end plate 49 are positioned outside the brackets 70 and 71 and are positioning members to which the positioning pins 55 are fixed. Are positioned so as to be arranged at equal pitches on the circumference of the circle. The stator shaft 48 is fixed to the front end plate 47 by welding.
[0035]
The inner side bolt / nut 44 and the outer side bolt / nut 45 are arranged with both plates 47 and 70 on the front side of the split stator tooth 41 with the coil 42, and with both plates 49 and 71 on the back side. The entirety of the stator teeth 41 with the coils 42 divided by the fastening is fixed, and the skeleton structure of the stator S is configured.
[0036]
The stator cooling pipe 72 is disposed at a position between the stator teeth 41 with the coils 42 adjacent in the circumferential direction, and both ends are supported by the front bracket 70 and the rear bracket 71.
[0037]
The resin mold portion 46 is formed by placing a skeleton structure supporting the stator cooling pipe 72 in a mold having a concave shape matching the overall shape of the stator, pouring the molten resin, and filling the space with the molten resin. Is done.
[0038]
At both end positions of the stator cooling refrigerant passage 43 for cooling the coil heat of the stator teeth 41, a refrigerant distribution lid member 91 having a partition wall on the inner surface and a refrigerant U-turn lid member 95 having a partition wall on the inner surface, respectively. It is attached using snap rings 56,56. In addition, 90 is a refrigerant introduction path.
[0039]
[Positioning structure of stator teeth]
FIG. 8 is a view showing a positioning structure of stator teeth divided in the multi-axis multilayer motor M of the first embodiment. In FIG. 8, reference numeral 41 denotes a stator tooth, 45 denotes an outer bolt / nut, and 47 denotes a front end. A plate, 49 is a rear end plate, and 57 is an insulating washer member.
[0040]
The outer bolt / nut 45 includes a nut 45a, a bolt head 45b, and a bolt shaft 45c. And, as a washer provided between the nut 45a and the front end plate 47, an insulating washer member 57 having an insulating material interposed at least in part is used, and the bolt head 45b and the rear end plate 49 are used. And an insulating washer member 57 in which an insulating material is interposed at least in part.
[0041]
The insulating washer member 57 is configured by a combination arrangement of a non-insulating washer 57a interposed between the nut 45a and the bolt head 45b, and an insulating washer 57b interposed between the end plates 47 and 49. The same configuration is adopted for the inner bolt / nut 44.
[0042]
Next, the operation will be described.
[0043]
[Basic function of multi-axis multi-layer motor]
By employing a multi-axis multilayer motor M in which two magnetic lines of force, the outer rotor magnetic field lines and the inner rotor magnetic field lines, are formed with two rotors and one stator, the coil 42 and a coil inverter (not shown) can be replaced by two inner rotor IRs and an outer rotor. Can be shared for OR. Then, by applying to the single coil 42 a composite current obtained by superimposing a three-phase alternating current on the inner rotor IR and a six-phase alternating current on the outer rotor OR, the two rotors IR and OR are independently controlled. can do.
[0044]
Therefore, although it is a single multi-axis multilayer motor M in appearance, it can be used as a combination of different or similar functions of the motor function and the generator function. For example, it has a motor having a rotor and a stator, and a motor having a rotor and a stator. Compared to the case where two generators are provided, the size is significantly reduced, which is advantageous in terms of space, cost and weight, and the loss due to current (copper loss and switching loss) can be prevented by using a common coil. .
[0045]
In addition, the present invention has a high degree of freedom of selection such that not only the usage of (motor + generator) but also the usage of (motor + motor) and (generator + generator) can be performed only by the composite current control. When adopted as a drive source for a hybrid vehicle as in the embodiment, the most effective or efficient combination can be selected from these many options according to the vehicle state.
[0046]
[Positioning action of stator teeth]
When the washer of the bolt and nut that sandwiches and fixes the positioning members disposed at both ends of the divided stator teeth with a coil is formed of a non-insulating material, a loop current is generated through the bracket members and the bolts that hold both ends of the stator teeth, The efficiency of the motor deteriorates.
[0047]
On the other hand, in order to ensure insulation, there is a plan to interpose an insulating washer (for example, see Japanese Patent Application Laid-Open No. H11-18221) between the washer and a bracket member for holding both ends of the stator teeth. Since the strength of the insulating washer is lower than that of iron or the like, it cannot withstand the surface pressure of the bolt seat surface.
[0048]
On the other hand, in the first embodiment, as a washer provided between the nut 45a of the outer bolt / nut 45 and the front end plate 47, an insulating washer member 57 having an insulating material interposed at least partially is used. In addition, as a washer provided between the bolt head 45b of the outer-side bolt / nut 45 and the back-side end plate 49, an insulating washer member 57 having an insulating material interposed at least in part is used. Similarly, since the insulating washer member 57 is used for the inner bolt / nut 44, the loop current flowing through the end plates 47, 49, which are the positioning members for the bolt / nut 44, 45 and the stator teeth 41, is cut off. The motor efficiency can be improved by interrupting the loop current.
[0049]
Further, the insulating washer 57b is formed by a combination of a non-insulating washer 57a interposed on the nut 45a and the bolt head 45b side and an insulating washer 57b interposed on both end plates 47 and 49. Therefore, the surface pressure from the nut 45a and the bolt head 45b acts evenly without being concentrated on a part, and the durability of the insulating washer 57b can be secured.
[0050]
Next, effects will be described.
In the stator structure of the multi-axis multilayer motor according to the first embodiment, the following effects can be obtained.
[0051]
(1) An inner rotor IR and an outer rotor OR are arranged concentrically with a stator S interposed therebetween, and the stator S is a stator with a plurality of coils 42 in which a coil 42 is wound around a stator tooth 41 formed of a laminated steel plate. In a multi-shaft multi-layer motor M having teeth 41 and bolts and nuts 44 and 45 for sandwiching and fixing positioning members disposed at both ends of the divided stator teeth 41 with coils 42, a nut and a bolt head and a positioning member As the washer provided between the two end plates 47 and 49, the insulating washer member 57 in which an insulating material is interposed at least partially, the bolts and nuts 44 and 45 and the two end plates 47 and 49 are used. The flowing loop current is interrupted, and the interruption of the loop current improves motor efficiency. Can be
[0052]
(2) The insulating washer member 57 is formed by a combination of a non-insulating washer 57a interposed between the nut 45a and the bolt head 45b and an insulating washer 57b interposed between the end plates 47 and 49. The durability of the insulating washer 57b can be ensured by the surface pressure distribution by the insulating washer 57a.
[0053]
(Second embodiment)
The second embodiment has the same basic structure as the first embodiment, but differs in that a step-like insulating washer member is used.
[0054]
That is, as shown in FIG. 9, the insulating washer member 57 of the second embodiment is composed of three non-insulating washers 57a arranged in a stepwise manner in order of diameter from the side closer to the nut 45a side and the front end plate 47. It is configured by a combination arrangement with an insulating washer 57b having the largest diameter interposed on the side. Here, a similar insulating washer member 57 is employed for the bolt head 45b side, and a similar insulating washer member 57 is employed for the inner bolt / nut 44. Since the other configuration is the same as that of the first embodiment, illustration and description are omitted.
[0055]
In operation, the creepage distance between the nut 45a and the front end plate 47, which is a positioning component of the stator teeth 41, can be increased, so that in addition to the interruption of the loop current in the first embodiment, non-insulation along the creepage is performed. The flow can be interrupted. The other operation is the same as that of the first embodiment, and the description is omitted.
[0056]
Next, effects will be described.
In the stator structure of the multi-axis multilayer motor according to the second embodiment, the following effect can be obtained in addition to the effect (1) of the first embodiment.
[0057]
(3) The insulating washer member 57 is composed of a plurality of non-insulating washers 57a arranged in a stepwise manner in order of decreasing diameter from the side closer to the nut and bolt head, and a diameter of the non-insulating washer 57 interposed on both end plates 47, 49. Since it is configured by a combination arrangement with the largest insulating washer 57b, the surface pressure acting on the insulating washer 57b can be reduced, and both end plates 47, which are positioning parts of the stator teeth 41 from the nut and bolt head, are provided. , 49 can be long, and the non-insulating flow along the creepage can be blocked.
[0058]
(Third embodiment)
The third embodiment has the same basic structure as the first embodiment, but is different from the first embodiment in that an insulating washer member in which a plurality of non-insulating washers and insulating washers are alternately arranged is used.
[0059]
That is, as shown in FIG. 10, the insulating washer member 57 of the second embodiment is configured by alternately arranging three non-insulating washers 57a and three insulating washers 57b 'and 57b. Here, for the non-insulating washer, a non-insulating washer 57a having the same diameter is used. For the insulating washer, two insulating washers 57b 'having a smaller diameter than the non-insulating washer 57a and an insulating washer having a larger diameter than the non-insulating washer 57a are used. 57b is used. Since the other configuration is the same as that of the first embodiment, illustration and description are omitted.
[0060]
Regarding the operation, as in the second embodiment, since the insulating washer member 57 has a stepped shape, the creepage distance from the nut 45a to the front end plate 47, which is a positioning component of the stator teeth 41, can be increased, and the creepage can be reduced. The induced non-insulating flow can be cut off. The other operation is the same as that of the first embodiment, and the description is omitted.
[0061]
Next, effects will be described.
In the stator structure of the multi-axis multilayer motor according to the third embodiment, the following effect can be obtained in addition to the effect (1) of the first embodiment.
[0062]
(4) Since the insulating washer member 57 is configured by alternately arranging three non-insulating washers 57a and three insulating washers 57b 'and 57b, the surface pressure acting on the insulating washers 57b' and 57b is reduced. In addition to reducing the distance, the creepage distance between the nut and the bolt head and the end plates 47 and 49, which are the positioning components of the stator teeth 41, can be increased, and the uninsulated flow along the creepage can be blocked.
[0063]
(Fourth embodiment)
The fourth embodiment is the same as the first embodiment in the basic structure, but is different from the first embodiment in that an insulating washer member in which a plurality of non-insulating washers and insulating washers are alternately arranged is used.
[0064]
That is, as shown in FIG. 11, the insulating washer member 57 of the second embodiment is configured by arranging one curved insulating washer 57c. The curved insulating washer 57c smoothly connects a flat portion in contact with the nut 45a and a flat portion in contact with the front end plate 47 by an arc portion. Since the other configuration is the same as that of the first embodiment, illustration and description are omitted. The operation is the same as that of the first embodiment, and the description is omitted.
[0065]
Next, effects will be described.
In the stator structure of the multi-axis multilayer motor according to the fourth embodiment, the following effect can be obtained in addition to the effect (1) of the first embodiment.
[0066]
(5) Since the insulating washer member 57 is constituted by arranging one curved insulating washer 57c, it is possible to provide elasticity for preventing the bolts and nuts 44 and 45 from being loosened, and to increase the height direction. Space can be omitted.
[0067]
As described above, the stator structure of the multi-axis multi-layer motor according to the present invention has been described based on the first to fourth embodiments. However, the specific configuration is not limited to these embodiments. Changes and additions in design are permitted without departing from the spirit of the invention according to each claim of the scope.
[0068]
For example, in the first embodiment, the example of the multi-axis multi-layer motor applied to the hybrid drive unit has been described. Also, the stator structure of the present invention can be adopted.
[0069]
Although the example of the structure of the insulating washer member has been described in the first to fourth embodiments, the structure of the insulating washer member may be at least partially as long as an insulating material is interposed therebetween. Structures other than the structure shown in the fourth embodiment are also included.
[Brief description of the drawings]
FIG. 1 is a schematic overall view showing a hybrid drive unit to which a multi-axis multilayer motor having a stator structure according to a first embodiment is applied.
FIG. 2 is a vertical sectional side view showing a hybrid transmission of a hybrid drive unit to which the multi-shaft multilayer motor of the first embodiment is applied.
FIG. 3 is a vertical sectional side view showing a multi-shaft multilayer motor M to which the stator structure of the first embodiment is applied.
FIG. 4 is a partially longitudinal front view showing a multi-shaft multilayer motor M to which the stator structure of the first embodiment is applied.
FIG. 5 is a view of a multi-shaft multilayer motor M to which the stator structure of the first embodiment is applied, viewed from the back side of the stator.
FIG. 6 is an explanatory diagram showing an example of a composite current applied to a stator coil of a multi-axis multilayer motor.
FIG. 7 is a longitudinal sectional side view showing a stator S in the multi-axis multilayer motor M of the first embodiment.
FIG. 8 is a diagram showing a positioning structure of stator teeth and an insulating washer member divided in the multi-axis multilayer motor M of the first embodiment.
FIG. 9 is a view showing an insulating washer member of a positioning structure of divided stator teeth in the multi-axis multilayer motor M of the second embodiment.
FIG. 10 is a view showing an insulating washer member having a stator teeth positioning structure divided in the multi-axis multilayer motor M of the third embodiment.
FIG. 11 is a view showing an insulating washer member of a positioning structure of stator teeth divided in a multi-axis multilayer motor M of a fourth embodiment.
[Explanation of symbols]
M Multi-axis multi-layer motor S Stator IR Inner rotor OR Outer rotor 41 Stator teeth 41a, 41b Axial hole 42 Coil 43 Refrigerant path 44 Inner bolt / nut (bolt / nut)
45 Outer side bolt / nut (bolt / nut)
46 resin mold part 47 front end plate (positioning member)
48 Stator shaft 49 Back end plate (positioning member)
70 Front side bracket 71 Back side bracket 72 Stator cooling pipe 57 Insulated washer member 57a Non-insulated washer 57b, 57b 'Insulated washer 57c Curved surface washer

Claims (5)

The inner rotor and the outer rotor are arranged concentrically across the stator,
The stator has a plurality of stator teeth with coils in which coils are wound around stator teeth formed of laminated steel plates, and bolts and nuts that sandwich and fix positioning members disposed at both ends of the divided stator teeth with coils. A multi-axis multilayer motor having
A stator structure for a multi-axis multi-layer motor, characterized in that an insulating washer member having an insulating material interposed at least in part is used as a washer provided between the bolt / nut and the positioning member. The stator structure of a multi-axis multilayer motor according to claim 1,
The stator of a multi-axis multilayer motor, wherein the insulating washer member is configured by a combination arrangement of a non-insulating washer interposed on a nut and a bolt head side and an insulating washer interposed on a positioning member side. Construction. The stator structure of a multi-axis multilayer motor according to claim 1,
The insulating washer member is a combination arrangement of a plurality of non-insulating washers arranged in a stepwise manner in order of diameter from the side closer to the nut and bolt head, and the largest diameter insulating washer interposed on the positioning member side. The stator structure of a multi-axis multilayer motor characterized by the following. The stator structure of a multi-axis multilayer motor according to claim 1,
The stator structure of a multi-axis multilayer motor, wherein the insulating washer member is configured by alternately arranging a plurality of non-insulating washers and insulating washers. The stator structure of a multi-axis multilayer motor according to claim 1,
The stator structure of a multi-axis multilayer motor, wherein the insulating washer member is configured by arranging a single curved insulating washer.

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