WO2014125646A1 - 回転電機 - Google Patents
回転電機 Download PDFInfo
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- WO2014125646A1 WO2014125646A1 PCT/JP2013/053870 JP2013053870W WO2014125646A1 WO 2014125646 A1 WO2014125646 A1 WO 2014125646A1 JP 2013053870 W JP2013053870 W JP 2013053870W WO 2014125646 A1 WO2014125646 A1 WO 2014125646A1
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- winding
- coil
- radial direction
- phase
- rotating electrical
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
Definitions
- This invention relates to rotating electrical machines such as electric motors and generators.
- stator windings in which conductor wires are wound around the teeth of the stator core are used from the viewpoint of reducing the size of coil ends that do not generate effective magnetic flux. It was. However, there is a demand for a stator using a distributed winding structure stator winding that can suppress torque pulsation and increase output.
- the winding configured by winding the conductor wire in a slot separated by two or more slots is referred to as a distributed winding winding. That is, the distributed winding is wound so that the conductor wire extending from one slot enters another slot across two or more consecutive teeth.
- distributed stator windings are configured (see, for example, Patent Document 1).
- a coil end bundle of a tortoiseshell shaped coil is bent at the top and formed into a crank shape that deviates by the entire width dimension of the conductor wires constituting the tortoiseshell shaped coil. Since it has been possible to enter the bottom side of one slot and the opening side of the other slot of a pair of slots apart from each other, the coil end becomes large, miniaturization cannot be achieved, and the length of the conductor wire is reduced. There was a problem that the coil resistance becomes longer, the winding resistance increases, and the efficiency decreases.
- the bundle of the coil ends of the turtle shell coil is bent at the top and formed into a crank shape, so that the tops of the coil ends adjacent to each other in the radial direction of each turtle shell coil are in contact with each other. Or very close. Therefore, the rows of the tops of the coil ends arranged in the radial direction without gaps are arranged in the circumferential direction, and a refrigerant flow channel having a radial direction in the flow channel direction is formed between the rows of the tops.
- the top row is arranged at a one-slot pitch in the circumferential direction, there is a problem that the flow path width is narrow, the heat radiation area is small, and sufficient winding cooling performance cannot be obtained.
- This invention was made to solve the above-mentioned problem, and while suppressing the increase in the dimensions of the coil end group, the heat dissipation area of the coil end group was increased to improve the cooling performance of the armature winding,
- the purpose is to obtain a rotating electrical machine that can achieve a small size and high efficiency.
- the rotary electric machine includes an annular armature core formed with a ratio of n slots per phase per pole (where n is a natural number of 2 or more), and an electric machine mounted on the armature core. It has an armature with a child winding.
- Each of the armature windings is formed by winding a continuous conductor wire that is insulation-coated and without a connection portion m times (where m is a natural number of 2 or more), and between the ends of the straight line portion at the coil end.
- the n-type winding body is configured by attaching n types of winding bodies, which are configured in a spiral shape to be connected and have different intervals between the linear portions connected by the coil ends, to each of the corresponding slot pairs.
- the wire is configured to be concentrically housed in n adjacent pairs of slots.
- the coil end has a top portion that is displaced by a predetermined amount in the radial direction at a substantially central portion between the connected linear portions, and the amount of radial displacement at the top portion is approximately a ⁇ d (where a is A natural number of 1 or more and (m ⁇ 1) or less, d is a radial thickness of the linear portion housed in the slot), and 2 ⁇ m two different types of the windings are placed in the slot.
- the linear portions of the wire bodies are accommodated in a line in the radial direction.
- the amount of radial displacement at the top of the coil end is smaller than the total thickness (m ⁇ d) of the m linear portions constituting each row of the winding body, the dimensions of the coil end group Increase of the rotating electric machine is suppressed, and the rotating electrical machine can be downsized.
- n types of winding bodies are housed in adjacent n pairs of slots and configured to be concentric, n types of windings arranged concentrically are arranged at the axial ends of the coil end group.
- the top rows arranged in the radial direction of the winding bodies located outside the wire body are arranged in the circumferential direction at a predetermined pitch.
- a refrigerant flow path having a large flow path width and having a flow path direction in the radial direction is formed between the top rows aligned in the radial direction. Further, since the gap is formed between the top portions arranged in the radial direction, a refrigerant flow path having the flow channel direction in the circumferential direction is formed between the top portions arranged in the radial direction. Thereby, the heat radiation area of the coil end group is increased, the cooling performance of the armature winding can be improved, and the efficiency of the rotating electrical machine can be increased.
- FIG. 1 It is a half sectional view which shows the rotary electric machine which concerns on Embodiment 1 of this invention. It is a perspective view which shows the principal part of the rotary electric machine which concerns on Embodiment 1 of this invention. It is a perspective view which shows the stator applied to the rotary electric machine which concerns on Embodiment 1 of this invention. It is a perspective view which shows the iron core block which comprises the stator iron core applied to the rotary electric machine which concerns on Embodiment 1 of this invention. It is a perspective view which shows the coil
- FIG. 27 is a sectional view taken along arrow XXVII-XXVII in FIG. 26. It is the principal part end elevation which looked at one coil end group of the stator in the conventional rotary electric machine from the axial direction outward. It is a perspective view which shows the cooling mechanism in the rotary electric machine which concerns on Embodiment 1 of this invention.
- FIG. 1 is a half sectional view showing a rotating electrical machine according to Embodiment 1 of the present invention
- FIG. 2 is a perspective view showing a main part of the rotating electrical machine according to Embodiment 1 of the present invention
- FIG. 3 is an embodiment of the present invention.
- FIG. 4 is a perspective view showing a stator block applied to the rotary electric machine according to Embodiment 1 of the present invention
- FIG. 5 is a perspective view showing an iron core block constituting the stator core applied to the rotary electric machine according to Embodiment 1 of the present invention.
- FIG. 6 is a perspective view showing a winding assembly constituting a stator winding applied to the rotary electric machine according to the first embodiment of the present invention
- FIG. 6 shows the winding assembly in the rotary electric machine according to the first embodiment of the present invention.
- FIG. 7 is a front view showing a winding assembly constituting a winding assembly in a rotary electric machine according to Embodiment 1 of the present invention, and FIG. 8 is an embodiment of the present invention.
- Winding assembly in rotating electrical machine according to No. 1 FIG. 9 is a perspective view showing a first winding body constituting the winding assembly in the rotary electric machine according to Embodiment 1 of the present invention, and FIG. 10 is an embodiment of the present invention.
- FIG. 11 is a front view showing a first winding body constituting the winding assembly in the rotary electric machine according to the first embodiment, and FIG.
- FIG. 11 shows the first winding constituting the winding assembly in the rotary electric machine according to the first embodiment of the present invention.
- FIG. 12 is a perspective view showing a second winding body that constitutes a winding assembly in a rotary electric machine according to Embodiment 1 of the present invention, and FIG. 13 shows Embodiment 1 of the present invention.
- FIG. 14 is a front view showing a second winding body constituting the winding assembly in the rotating electrical machine, and FIG. 14 shows the second winding body constituting the winding assembly in the rotating electrical machine according to Embodiment 1 of the present invention.
- FIG. 15 is a plan view, and FIG. 15 shows how to assemble the winding assembly according to Embodiment 1 of the present invention. Is a diagram illustrating a.
- the rotating electrical machine 100 is fixed to the housing 1 having the bottomed cylindrical frame 2 and the end plate 3 that closes the opening of the frame 2 and the cylindrical portion of the frame 2 in an internally fitted state.
- a stator 10 as an armature and a rotary shaft 6 that is rotatably supported on the bottom of the frame 2 and the end plate 3 via bearings 4 are rotatably arranged on the inner peripheral side of the stator 10.
- a rotor 5 made of the same.
- the rotor 5 includes a rotor core 7 fixed to a rotary shaft 6 inserted through the shaft center position, and is embedded in the outer peripheral surface side of the rotor core 7 so as to penetrate in the axial direction and have a predetermined pitch in the circumferential direction. And a permanent magnet type rotor including a permanent magnet 8 that constitutes a magnetic pole.
- the rotor 5 is not limited to a permanent magnet type rotor, and a squirrel-cage rotor in which a non-insulated rotor conductor is housed in a slot of a rotor core and both sides are short-circuited by a short-circuit ring, or an insulated conductor. You may use the winding-type rotor which attached the wire to the slot of the rotor core.
- the stator 10 includes a stator core 11 as an armature core, and a stator winding 20 as an armature winding mounted on the stator core 11.
- the number of poles of the rotor 5 is eight
- the number of slots of the stator core 11 is 48
- the stator winding 20 is a three-phase AC winding. That is, the slots are formed in the stator core 11 at a rate of two per phase per pole.
- the core block 12 is obtained by dividing an annular stator core 11 into 48 equal parts in the circumferential direction. As shown in FIG. 4, the core block 12 is produced by laminating and integrating a predetermined number of electromagnetic steel plates, and has an arc-shaped core. A back portion 12a and teeth 12b extending radially inward from the inner peripheral wall surface of the core back portion 12a are provided.
- the stator core 11 is formed by aligning and integrating the 48 core blocks 12 in the circumferential direction, with the teeth 12b facing inward in the radial direction, but with the side surfaces in the circumferential direction of the core back portion 12a facing each other. It is configured in an annular shape.
- the slots 13 constituted by the iron core blocks 12 adjacent in the circumferential direction are arranged at an equiangular pitch in the circumferential direction so as to open to the inner circumferential side.
- the teeth 12b are formed in a tapered shape in which the circumferential width gradually decreases inward in the radial direction, and the cross section of the slot 13 is rectangular.
- the stator winding 20 is configured by subjecting a winding assembly 21 attached to the stator core 11 to a predetermined connection process.
- the winding assembly 21 is configured by arranging winding assemblies 22 to be described later in the circumferential direction.
- Winding ends 221g and 222g which will be described later, respectively extend in the axial direction from the winding assembly 21 and are arranged in the circumferential direction at a one-slot pitch on the inner diameter side of the winding assembly 21.
- winding ends 221h and 222h which will be described later, respectively extend in the axial direction from the winding assembly 21 and are arranged in the circumferential direction at a one-slot pitch on the outer diameter side of the winding assembly 21.
- a predetermined joining process is performed on the winding ends 221g, 222g, 221g, and 222h.
- Each of the winding assemblies 22 is made of a rectangular conductor wire made of continuous copper wire, aluminum wire, or the like that is insulated with enamel resin and has no connection portion, with a certain interval for each turn.
- a first winding body 221 and a second winding body 222 each having a hexagonal shape and spirally wound four times are provided.
- first winding body 221 and the second winding body 222 are formed by winding the conductor wire in a spiral manner four times to produce a cylindrical coil body, and then forming the coil body into a substantially hexagonal shape by a coil molding machine. Made by molding.
- first winding body 221 and the second winding body 222 may be formed by bending a conductor wire into a substantially hexagonal shape and bending it in a spiral shape by bending.
- the first winding body 221 is arranged in two rows at a 7-slot angular interval, with four gaps in each row, with a gap d in each row, in the short-side direction of the rectangular cross section.
- the first and second linearly connected first and second linear portions 221a and 221b and the first and second linear portions 221a and 221b are alternately connected between one end and the other end in the length direction.
- 2 coil ends 221c and 221d is the short side length of the rectangular cross section of the conductor wire.
- the 7-slot angular interval is an interval between the slot centers of the slots 13 on both sides of the seven consecutive teeth 12b, and corresponds to a 7-slot pitch.
- the first coil end 221c has a predetermined inclination from one end of the first linear portion 221a of one row to the second linear portion 221b side of the other row, and the length direction of the first and second linear portions 221a, 221b. Extending outward, bent at the center (first top 221e) between the rows of the first and second straight portions 221a, 221b and displaced by a distance d in the arrangement direction of the first and second straight portions 221a, 221b Then, it is bent back and extends to the second linear portion 221b side of the other row with a predetermined inclination and extends inward in the longitudinal direction of the first and second linear portions 221a, 221b, and the second row of the other row It is connected to one end of the straight line part 221b.
- the second coil end 221d has a predetermined inclination from the other end of the second linear portion 221b of the other row to the first linear portion 221a side of one row, and the first and second linear portions 221a and 221b. Extending outward in the longitudinal direction of the first and second straight portions 221a and 221b and bent at the center portion (second top portion 221f) between the rows of the first and second straight portions 221a and 221b in the arrangement direction of the first and second straight portions 221a and 221b.
- the first and second straight portions 221a and 221b are opposed to each other in the short-side direction of the rectangular cross section with the planes formed by the long sides of the rectangular cross-section facing each other. Are arranged at a pitch of about twice the short side length (2 ⁇ d).
- the first straight portion 221a and the second straight portion 221b connected by the first coil end 221c and the second coil end 221d are shifted by a distance d in the arrangement direction by the first top portion 221e and the second top portion 221f. Yes.
- the first winding body 221 includes a winding end 221h extending in the length direction from the other end of the first linear portion 221a located at one end in the arrangement direction of one row, and the other in the arrangement direction of the other row.
- a winding end 221g extending in the length direction from the other end of the second linear portion 221b located at the end.
- FIG. 10 when the first winding body 221 is viewed from the inside in the radial direction, the intersection of rectangular diagonal lines in which the first straight portion 221a and the second straight portion 221b are two parallel sides. Is the center O1 of the first winding body 221.
- the second winding body 222 includes first and second straight portions 222a and 222b, first and second coil ends 222c and 222d, and first and second top portions 222e and 222f. And winding ends 222h and 222g.
- the second winding body 222 is similar to the first winding body 221 except that the row of the first linear portions 222a and the row of the second linear portions 222b are separated by a four-slot angle interval. It is configured.
- the first winding body 221 is configured with a long-pitch winding pitch
- the second winding body 222 is configured with a short-pitch winding pitch.
- the winding assembly 22 is manufactured by incorporating the second winding body 222 into the first winding body 221 from the side of the first winding body 221. Specifically, from the side of the first winding body 221, the first linear portion 222 a in one row of the second winding body 222 is connected to the second linear portion 221 b in the other row of the first winding body 221. Insert between. Then, the second winding body 22 is moved until the row of the second straight portions 222b of the second winding body 222 is located at a position spaced by one slot angle from the row of the second straight portions 221b of the first straight portion 221. The winding assembly 22 is assembled by translating.
- the winding assembly 22 assembled in this way is a spiral composed of first and second coil ends 222c and 222d and first and second top portions 222e and 222f.
- a spiral portion is formed by the first and second linear portions 221a and 221b, the first and second coil ends 221c and 221d, and the first and second top portions 221e and 221f of the first winding body 221. It enters into the circular part of the shape. As shown in FIG.
- FIG. 16 to 19 are views for explaining a method of manufacturing the winding assembly according to Embodiment 1 of the present invention.
- FIG. 16 shows a method of assembling two winding assemblies, and FIGS. The procedure for incorporating the 24th winding assembly is shown.
- the winding assemblies 22 are arranged in the assembling order, the winding assemblies 22 1 , the winding assemblies 22 2 , the assembled winding bodies 22 3 ...
- the winding assemblies 22 23 , and the winding assemblies 22. 24 . 20 and 21 are views for explaining a method for assembling the stator according to the first embodiment of the present invention.
- FIG. 20 shows a state before the iron block is mounted on the winding assembly, and FIG.
- FIG. 21 shows the iron core.
- the state after the block is mounted on the winding assembly is shown. 20 and 21, for convenience, the winding assembly 21 is represented by only the first and second straight portions 221a, 222a, 221b, and 222b.
- FIG. 22 is a developed view of the winding assembly in the rotary electric machine according to Embodiment 1 of the present invention mounted on the stator core as seen from the outside in the radial direction
- FIG. 23 shows Embodiment 1 of the present invention.
- FIG. 23 is a developed view of the state where the winding assembly in the rotating electrical machine is mounted on the stator core as viewed from one end side in the axial direction
- FIG. 23A shows the arrangement of the first winding body
- FIG. 23 has shown arrangement
- the first coil end is indicated by a solid line
- the second coil end is indicated by a dotted line.
- the first and second coil ends are shown by straight lines for convenience.
- the first and second winding assemblies 22 1 and 22 2 are adjacent to each other in the circumferential direction with their axial height positions aligned.
- the second straight portion 221b of the second winding assembly 22 2 is inserted between the first straight portions 221a of the first winding assembly 22 1 .
- the second straight portions 221b and 222b of the second winding assembly 22 2 pass between the first straight portions 221a and 222a of the first winding assembly 22 1 , and the first winding set.
- winding assemblies 22 are sequentially aligned in the axial direction, moved in the circumferential direction, and assembled to the 23rd winding assembly 22 23 .
- the assembly 23 in which the 23 winding assemblies 22 1 to 22 23 are assembled is expanded in diameter, and as shown in FIG. 17, the first winding body 22 1 and the 23rd winding assembly is molded between the solid 22 23 24 th winding assembly 22 24 C-shaped widened than the circumferential width of.
- the 24th winding assembly 22 24 is assembled to the 23rd winding assembly 22 23 of the assembly 23 . Further, as shown in FIG. 19, the first winding assembly 22 1 and the 24th winding assembly 22 24 are assembled to close the opening of the C-shaped assembly 23, and shown in FIG. An annular winding assembly 21 is assembled.
- the 48 iron core blocks 12 are arranged so that each of the teeth 12b has a diameter between rows of the adjacent first and second straight portions 221a, 222a, 221b, and 222b of the winding assembly 21. They are arranged at a substantially equiangular pitch in the circumferential direction so as to be located outward in the direction.
- the iron core blocks 12 arranged in the circumferential direction are simultaneously moved radially inward. Thereby, each of the teeth 12b of the iron core block 12 is inserted between adjacent rows of the first and second straight portions 221a, 222a, 221b, and 222b.
- the winding assembly 21 is mounted on the stator core 11 constituted by the 48 core blocks 12.
- the tapered teeth 12b Since the second straight portions 221a, 222a, 221b, and 222b are inserted from the outer diameter side and moved inward in the radial direction, the sixteen first and second straight portions 221a, 222a, 221b, and 222b are inserted. Are aligned in a row. Therefore, in each slot 13, as shown in FIG.
- first and second straight portions 221 a, 222 a, 221 b, and 222 b are arranged so that the long side of the rectangular cross section faces the circumferential direction in the radial direction. Are stored in a line in a row.
- the first coil ends 221c and 222c of the first winding body 221 and the second winding body 222 are fixed to the stator core.
- 11 is pulled outward in the axial direction from the slot 13 at an angle ⁇ with respect to the end face of 11, folded back at the first top portions 221 e and 222 e, and then returned to the slot 13 with an angle ⁇ with respect to the end face of the stator core 11.
- the second coil ends 221d and 222d of the first winding body 221 and the second winding body 222 are drawn axially outward from the slot 13 at an angle ⁇ with respect to the end face of the stator core 11, and the second top portion 221f. , 222f and then returned to the end face of the stator core 11 at an angle ⁇ and stored in the slot 13.
- the first straight portion 221 a of the first winding body 221 of the winding assembly 22 is accommodated in the same slot 13 as the second straight portion 222 b of the second winding body 222 of the other winding assembly 22. Further, the second straight portion 221 b of the first winding body 221 of the winding assembly 22 is accommodated in the same slot 13 as the first straight portion 222 a of the first winding body 221 of the other winding assembly 22. Accordingly, as shown in FIG. 23, the first linear portions 221a and the second linear portions 222b are alternately arranged in the radial direction, and the second linear portions 222a and the second linear portions 221b are in the radial direction. Are alternately accommodated in slots 13 arranged in the circumferential direction.
- FIGS. 24 is an end view showing the terminal position of the stator winding in the rotary electric machine according to Embodiment 1 of the present invention
- FIG. 25 is the U-phase winding of the stator winding in the rotary electric machine according to Embodiment 1 of the present invention. It is a schematic diagram explaining the connection method of a line.
- FIG. 24 shows the terminal positions of the first and second winding bodies 221 and 222 attached to the stator core 11.
- 1, 4, 7... 42 are slot numbers assigned to the slots 13 in order in the circumferential direction.
- the first straight portion 221a has a slot number (1 + 6n) (where n is a natural number including 0).
- U2-1A, U2-2A,... U2-8A and U2-1B, U2-2B are winding ends of the first winding body 221 constituting the U-phase winding mounted in the group of slots 13 of FIG. ...
- U2-8B is a second winding body constituting a U-phase winding in which the first straight portion 222a is mounted in the group of slots 13 whose slot number is (2 + 6n) (where n is a natural number including 0). 222 is a winding end.
- 221 and 222 constitute a V-phase winding.
- V1-1A, V1-2A, V1-1B, V1-2B, V2-1A are used as winding ends of the first and second winding bodies 221 and 222 constituting the V-phase winding.
- V2-2A, V2-1B, V2-2B only, and winding ends of the first and second winding bodies 221 and 222 constituting the W-phase winding are W1-1A, W1-2A, W1- Only 1B, W1-2B, W2-1A, W1-2A, W2-1B, and W1-2B are shown.
- U2-1A and U2-2A are the feeding end and neutral point of the U-phase winding.
- the V-phase winding is obtained by connecting the 16 first and second winding bodies 221 and 222 constituting the V-phase in series.
- a W-phase winding can be obtained by connecting 16 first and second winding bodies 221 and 222 constituting the W-phase in series.
- the U-phase winding, the V-phase winding and the W-phase winding configured in this way are a combination of a long-pitch winding and a short-pitch winding, and have a winding resistance equivalent to that of a full-pitch winding. It becomes.
- FIGS. 26 is an end view of the main part of one coil end group of the stator in the rotary electric machine according to Embodiment 1 of the present invention viewed from the outside in the axial direction
- FIG. 27 is a cross-sectional view taken along the line XXVII-XXVII in FIG.
- FIG. 28 is an end view of the principal part of one coil end group of a stator in a conventional rotating electric machine as viewed from the outside in the axial direction
- FIG. 29 is a perspective view showing a cooling mechanism in the rotating electric machine according to Embodiment 1 of the present invention. It is. In FIG. 27, only the cross section of the coil end is shown for convenience.
- a bundle of turtle shell-shaped coil ends 50 is bent at the top 51 to form a crank shape on the end face of the stator core 52. Since it is formed, the top portions 51 of the coil ends 50 adjacent to each other in the radial direction of the respective turtle shell coils are in contact with each other or very close to each other. Therefore, as shown by arrows in FIG. 28, the rows of the top portions 51 of the coil ends 50 arranged in the radial direction without gaps are arranged at a pitch of approximately one slot in the circumferential direction, and the refrigerant flow having the flow path direction as the radial direction. A path is formed between the rows of the tops 51.
- the refrigerant flow path having the flow direction in the circumferential direction is between the tops 51 adjacent in the radial direction. Not formed.
- the first winding body 221 is formed in a spiral shape by winding the conductor wire four times, separating the first straight portion 221a and the second straight portion 221b by a 7-slot angle
- the two-winding body 222 is formed in a spiral shape by winding the conductor wire four times, separating the first straight portion 222a and the second straight portion 222b by a 5-slot angle.
- the first winding body 221 and the second winding body 222 are arranged concentrically, and each of the winding parts of the second winding body 222 has an inner circumference of the corresponding winding part of the first winding body 221.
- the outer surface of one coil end group of the stator winding 20 is configured by the first coil end 221c of the first winding body 221, and the outer surface of the other coil end group is the first winding body 221.
- the second coil end 221d is configured by the first coil end 221c of the first winding body 221, and the outer surface of the other coil end group is the first wind
- first top portions 221e arranged in a row in the radial direction of the first winding body 221 are arranged in the circumferential direction. They are arranged at a pitch of approximately 2 slots. Accordingly, as indicated by an arrow in FIG. 26, the flow direction is between the first top portions 221 e arranged in a row in the radial direction on the outer surface of one coil end group of the stator winding 20. A refrigerant flow path having a radial direction is formed.
- a gap d is formed between the first coil ends 221c adjacent in the radial direction as shown in FIG.
- a refrigerant channel having a substantially circumferential direction in the channel direction is formed between the first coil ends 221c adjacent in the radial direction.
- a refrigerant channel having a radial direction as the flow channel direction and a refrigerant channel having a circumferential direction as the flow channel direction are formed.
- the refrigerant flow path whose radial direction is the flow path direction is formed between the rows of the first top portions 221e arranged in the circumferential direction at a substantially two-slot pitch.
- the flow path width is widened, and the heat radiation area of the coil end group is increased.
- the refrigerant flow path whose circumferential direction is the flow path direction is formed in the coil end group of the stator winding 20, so that the heat radiation area of the coil end group can be increased.
- the heat radiation area of the coil end group is increased, and the heat generated in the stator winding 20 can be efficiently radiated to the refrigerant.
- the rotating electrical machine 100 configured as described above is installed so that the rotating shaft 6 is horizontal, and if a cooling mechanism that hangs the refrigerant from the radial direction is employed, high cooling is achieved. Performance can be realized.
- a bundle of the coil end 50 of the turtle shell coil is bent at the top 51 to form a crank shape, and the turtle shell coil is fixed. It can be mounted on the core iron core 52. Therefore, for example, when the tortoiseshell-shaped coil is formed by winding a conductor wire having a width d for 4 turns, a bundle of four coil ends 50 is bent at the top 51 so as to shift by 4d in the radial direction. Become.
- the first and second coil ends 221c, 221d, 222c, and 222d are bent at the first and second top portions 221e, 2221f, 222e, and 222f, and the first linear portions 221a and 222a
- the winding assembly 22 is manufactured by concentrically assembling the first winding body 221 and the second winding body 222 in which the two linear portions 221b and 222b are shifted by d in the radial direction.
- the first embodiment since one coil end is bent at the top so as to be displaced by d in the radial direction, the bending at the top is facilitated, and the radial dimension of the coil ends, that is, the coil end group, is increased.
- the axial dimension can be reduced.
- the rotating electrical machine can be reduced in size, the circumference of the coil end is shortened, the winding resistance is reduced, and the efficiency of the rotating electrical machine is increased.
- the amount of displacement in the radial direction at the first and second top portions 221e, 221f, 222e, and 222f is d, and the first and second straight portions 221a, 221b, 222a, and 222b Therefore, it is possible to reduce the radial dimension and the axial dimension of the coil end group as compared with the conventional example.
- Embodiment 2 FIG. In the first embodiment described above, the rotating electrical machine in which the slots are formed in the stator core at a rate of two per pole per phase and the stator winding is a three-phase AC winding has been described. Now, a description will be given of a rotating electrical machine in which slots are formed in a stator core at a ratio of 3 per pole per phase and the stator winding is a three-phase AC winding.
- FIG. 30 is a developed view of the state in which the winding assembly in the rotary electric machine according to Embodiment 2 of the present invention is mounted on the stator core as viewed from the outside in the radial direction.
- a winding assembly 40 includes a first winding body 401 configured by winding a rectangular cross-section conductor wire four times in a substantially hexagonal manner with a predetermined interval for each turn.
- a second winding body 402 and a third winding body 403 are provided.
- the first winding body 401 has two rows that are 11 slots apart from each other at an angular interval of the first and second linear portions 401a that are arranged in four rows in the short-side direction of the rectangular section with a gap d in each row. , 401b, and first and second coil ends 401c, 401d for alternately connecting one end and the other end in the length direction between the rows of the first and second linear portions 401a, 401b. Yes.
- the first winding body 401 has a long-pitch winding pitch.
- the second winding body 402 is formed in two rows at an interval of 7 slots, and the first and second straight portions 402a are arranged in four rows in the short-side direction of the rectangular cross section with a gap d in each row. , 402b, and first and second coil ends 402c, 402d for alternately connecting one end and the other end in the length direction between the first and second linear portions 402a, 402b. Yes.
- the second winding body 402 has a short pitch winding pitch.
- the third winding body 403 is arranged in two rows with a 9-slot angular interval, and the first and second straight portions 403a arranged in four rows in the short-side direction of the rectangular cross section with a gap d in each row. , 403b, and first and second coil ends 403c, 403d that alternately connect one end and the other end in the length direction between the first and second linear portions 403a, 403b. Yes.
- the third winding body 403 is configured with a winding pitch of full-pitch winding.
- the first winding body 401, the second winding body 402, and the third winding body 403 are assembled such that their spiral winding portions are arranged concentrically, and the winding assembly 40 is assembled.
- the winding assembly 40 thus configured is accommodated in slots of the stator core formed at a ratio of 3 per pole per phase at a 3-slot pitch to constitute a stator winding.
- the first winding body 401, the second winding body 402, and the third winding are different in the distance between columns of the first and second linear portions 401a, 401b, 402a, 402b, 403a, and 403b. Since the linear bodies are arranged concentrically, the same effects as those of the first embodiment can be obtained.
- FIG. 31 is a developed view of a state where a winding assembly in a rotary electric machine according to Embodiment 3 of the present invention is mounted on a stator core, as viewed from one end side in the axial direction.
- FIG. The arrangement of the winding bodies is shown, and
- FIG. 31 (b) shows the arrangement of the second winding bodies.
- FIG. 32 is a schematic diagram for explaining a method of connecting the U-phase windings of the stator winding in the rotary electric machine according to Embodiment 3 of the present invention.
- the first winding body 411 is divided into two rows at an interval of 6 slots, with four gaps in each row, with a gap d in each row.
- the first and second linear portions 411a and 411b arranged one by one and the first and second linear portions 411a and 411b are connected between the first and second linear portions 411a and 411b.
- the first winding body 411 is configured with a winding pitch of full-pitch winding.
- the second winding body 412 is divided into two rows at an angle interval of 4 slots, with a gap d in each row, and four in the short side direction of the rectangular cross section.
- the first and second linear portions 412a and 412b arranged one by one, and the first and second linear portions 412a and 412b are connected to each other in such a manner as to alternately connect one end and the other end in the length direction.
- the second winding body 412 is configured with a short pitch winding pitch.
- first winding body 411 and the second winding body 412 are assembled so that the spiral winding portions are arranged concentrically to form a winding assembly.
- the winding assembly configured as described above is housed in a slot of the stator core formed at a ratio of 2 per pole per phase at a 2-slot pitch to constitute a stator winding.
- the first and second winding bodies 221 and 222 are used in place of the first and second winding bodies 221 and 222, except that the first and second winding bodies 411 and 412 are used. It is constituted similarly.
- the first winding body 411 and the second winding body 412 having different distances between the first and second linear portions 411a, 411b, 412a, 412b are arranged concentrically. Therefore, the same effects as those of the first embodiment are obtained.
- the first linear portion 411a of the first winding body 411 which is a full-node winding, is another first winding body 411 of the same phase (another first phase that is 180 degrees out of phase with an electrical angle).
- the first winding body 411) is housed in the same slot 13 as the second linear portion 411b.
- the first straight portion 412a of the second winding body 412 that is a short-node winding is housed in the same slot 13 as the second straight portion 412b of the second winding body 412 of the other phase.
- U1-1A, U1-2A... U1-8A and U1-1B, U1-2B... U1-8B have slot numbers (1 + 6n) of the first straight portion 411a of the first winding body 411. ) (Where n is a natural number including 0), the winding ends of the first winding body 411 constituting the U-phase winding mounted in the group of slots 13, U2-1A, U2-2A.
- U2-8A and U2-1B, U2-2B,..., U2-8B have a first straight portion 412a mounted in a group of slots 13 whose slot number is (2 + 6n) (where n is a natural number including 0). This is a winding end of the second winding body 412 constituting the phase winding.
- U1-1B and U1-2A, U1-2B and U1-3A, U1-3B and U1-4A, U1-4B and U1- 5A, U1-5B and U1-6A, U1-6B and U1-7A, U1-7B and U1-8B are connected.
- U1-phase winding which connected the eight 1st winding bodies 411 in series is obtained.
- U1-1A and U1-8B are the feeding end (411in) and the neutral point (411n) of the U1-phase winding.
- U2-1A and U2-8B are the feeding end (412in) and the neutral point (412n) of the U2-phase winding.
- first winding bodies 411 constituting the V phase are connected in series to obtain a V1 phase winding
- eight second winding bodies 412 are connected in series to obtain a V2 phase winding. Is obtained.
- eight first winding bodies 411 constituting the W phase are connected in series to obtain a W1 phase winding
- eight second winding bodies 412 are connected in series to obtain a W2 phase winding. Is obtained.
- the first three-phase AC winding is configured by the U1-phase winding, the V1-phase winding, and the W1-phase winding, and the U2-phase winding, the V2-phase winding, and the W2-phase winding are the first.
- Two three-phase AC windings are configured.
- a dedicated inverter is connected to each of the first and second three-phase AC windings to operate the rotating electrical machine. Therefore, the rotating electrical machine can be operated even if one of the three-phase AC windings is disconnected.
- each phase winding of the first three-phase AC winding is configured by connecting the first winding body 411 of all-pitch winding in series, and each phase winding of the second three-phase AC winding is short.
- a second winding body 412 having a node winding is connected in series. Therefore, since different magnitudes of current can flow through the first three-phase AC winding and the second three-phase AC winding, harmonics of the magnetomotive force from the stator can be reduced, and iron loss and harmonics can be reduced. Torque pulsation due to waves can be reduced.
- FIG. 33 is a developed view of the state where the winding assembly in the rotary electric machine according to Embodiment 4 of the present invention is attached to the stator core, as viewed from one end side in the axial direction.
- FIG. 33 The arrangement of the winding bodies is shown, and FIG. 33 (b) shows the arrangement of the second winding bodies.
- the first coil end is indicated by a solid line
- the second coil end is indicated by a dotted line.
- the first and second coil ends are shown by straight lines for convenience.
- the first winding bodies 421 are arranged in two rows at an interval of 7 slots and arranged in four rows in the short side direction of the rectangular cross section.
- First and second coil ends 421c and 421d that alternately connect one end and the other end in the length direction between the rows of the portions 421a and 421b and the first and second linear portions 421a and 421b.
- the radial displacement amount at the first top portion of the first coil end 421c is 2d
- the radial displacement amount at the second top portion of the second coil end 421d is d.
- the first winding body 421 has a long pitch winding pitch.
- the second winding body 422 includes first and second straight lines arranged in four rows in the short-side direction of the rectangular cross section in two rows at an angle interval of 4 slots.
- First and second coil ends 422c and 422d that alternately connect one end and the other end in the length direction between the rows of the portions 422a and 422b and the first and second linear portions 422a and 422b.
- the radial displacement amount at the first top portion of the first coil end 422c is 2d
- the radial displacement amount at the second top portion of the second coil end 422d is d.
- the second winding body 422 is configured with a short pitch winding pitch.
- first winding body 421 and the second winding body 422 are assembled so that the spiral winding portions are arranged concentrically to constitute a winding assembly.
- the winding assembly thus configured is housed in a slot of the stator core formed at a ratio of 2 per pole per phase at a two-slot pitch to constitute a stator winding.
- the first and second winding bodies 221 and 222 are used in place of the first and second winding bodies 221 and 222, except that the first and second winding bodies 421 and 422 are used. It is constituted similarly.
- the first winding body 421 and the second winding body 422 having different distances between the first and second linear portions 421a, 421b, 422a, 422b are arranged concentrically. Therefore, the same effects as those of the first embodiment are obtained. Also in the fourth embodiment, the radial displacement amounts at the first and second top portions are smaller than the total width (4d) in the arrangement direction of the first and second linear portions 421a, 421b, 422a, 422b. Compared with the conventional example, the radial dimension and the axial dimension of the coil end group can be reduced.
- FIG. 34 is a developed view of the state in which the winding assembly in the rotary electric machine according to Embodiment 5 of the present invention is attached to the stator core, as viewed from one end side in the axial direction.
- FIG. 34 The arrangement of the winding bodies is shown, and FIG. 34 (b) shows the arrangement of the second winding bodies.
- the first coil end is indicated by a solid line
- the second coil end is indicated by a dotted line.
- the first and second coil ends are shown by straight lines for convenience.
- the first winding body 431 is arranged in two rows at 7-slot angular intervals, and four first and second straight lines arranged in the short side direction of the rectangular cross section.
- First and second coil ends 431c and 431d that alternately connect one end and the other end in the length direction between the rows of the portions 431a and 431b and the first and second linear portions 431a and 431b.
- the amount of radial displacement at the first top of the first coil end 431c is d or 2d
- the amount of radial displacement at the second top of the second coil end 431d is d.
- the first winding body 431 has a long-pitch winding pitch.
- the second winding bodies 432 are arranged in two rows at four slot angle intervals, and four first and second straight lines are arranged in the short side direction of the rectangular cross section.
- First and second coil ends 432c and 432d that alternately connect one end and the other end in the length direction between the portions 432a and 432b and the first and second linear portions 432a and 432b.
- the radial displacement amount at the first top portion of the first coil end 432c is d or 2d
- the radial displacement amount at the second top portion of the second coil end 432d is d.
- the second winding body 432 is configured with a short pitch winding pitch.
- the 1st winding body 431 and the 2nd winding body 432 are assembled
- the winding assembly thus configured is housed in a slot of the stator core formed at a ratio of 2 per pole per phase at a two-slot pitch to constitute a stator winding.
- the fourth embodiment is the same as the first embodiment except that the first and second winding bodies 431 and 432 are used instead of the first and second winding bodies 221 and 222. It is constituted similarly.
- the first winding body 431 and the second winding body 432 having different distances between the first and second linear portions 431a, 431b, 432a, 432b are arranged concentrically. Therefore, the same effects as those of the first embodiment are obtained. Also in the fifth embodiment, the radial displacement amounts at the first and second top portions are smaller than the total width (4d) in the arrangement direction of the first and second straight portions 431a, 431b, 432a, 432b. Compared with the conventional example, the radial dimension and the axial dimension of the coil end group can be reduced.
- the stator is used.
- the armature is not limited to the stator, and when the rotor is a wound rotor, the present application is applied to the rotor. The same effect can be obtained.
- an 8-pole 48-slot rotary electric machine has been described. Needless to say, the number of poles and the number of slots are not limited to 8-pole 48-slots. Further, the number of slots is assumed to be formed at a rate of 2 or 3 per phase per pole, but the number of slots per phase per pole may be two or more.
- the stator winding is configured as a three-phase AC winding.
- the stator winding is not limited to a three-phase AC winding, and may be, for example, a five-phase AC winding.
- the winding body is manufactured using a conductor wire having a rectangular cross section, but the winding body may be manufactured using a conductor wire having a circular cross section. In this case, bending of the conductor wire is facilitated.
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Abstract
Description
n種類の巻線体が、隣り合うn対のスロット対に収納されて同心状になるように構成されているので、コイルエンド群の軸端には、同心状に配置されたn種類の巻線体の外側に位置する巻線体の径方向に並んだ頂部の列が所定のピッチで周方向に配列される。したがって、大きな流路幅を有し、流路方向を径方向とする冷媒流路が径方向に並んだ頂部の列間に形成される。さらに、隙間が径方向に並んだ頂部間に形成されるので、流路方向を周方向とする冷媒流路が径方向に並んだ頂部間に形成される。これにより、コイルエンド群の放熱面積が増大し、電機子巻線の冷却性能を向上でき、回転電機の高効率化が図られる。
図1はこの発明の実施の形態1に係る回転電機を示す片側断面図、図2はこの発明の実施の形態1に係る回転電機の要部を示す斜視図、図3はこの発明の実施の形態1に係る回転電機に適用される固定子を示す斜視図、図4はこの発明の実施の形態1に係る回転電機に適用される固定子鉄心を構成する鉄心ブロックを示す斜視図、図5はこの発明の実施の形態1に係る回転電機に適用される固定子巻線を構成する巻線アッセンブリを示す斜視図、図6はこの発明の実施の形態1に係る回転電機における巻線アッセンブリを構成する巻線組立体を示す斜視図、図7はこの発明の実施の形態1に係る回転電機における巻線アッセンブリを構成する巻線組立体を示す正面図、図8はこの発明の実施の形態1に係る回転電機における巻線アッセンブリを構成する巻線組立体を示す平面図、図9はこの発明の実施の形態1に係る回転電機における巻線組立体を構成する第1巻線体を示す斜視図、図10はこの発明の実施の形態1に係る回転電機における巻線組立体を構成する第1巻線体を示す正面図、図11はこの発明の実施の形態1に係る回転電機における巻線組立体を構成する第1巻線体を示す平面図、図12はこの発明の実施の形態1に係る回転電機における巻線組立体を構成する第2巻線体を示す斜視図、図13はこの発明の実施の形態1に係る回転電機における巻線組立体を構成する第2巻線体を示す正面図、図14はこの発明の実施の形態1に係る回転電機における巻線組立体を構成する第2巻線体を示す平面図、図15はこの発明の実施の形態1に係る巻線組立体の組み立て方法を説明する図である。
なお、他方のコイルエンド群においても、同様に、流路方向を径方向とする冷媒流路と流路方向を周方向とする冷媒流路が形成される。
上記実施の形態1では、スロットが毎極毎相当たり2個の割合で固定子鉄心に形成され、固定子巻線を三相交流巻線とする回転電機について説明したが、この実施の形態2では、スロットが毎極毎相当たり3の割合で固定子鉄心に形成され、固定子巻線を三相交流巻線とする回転電機について説明する。
図31はこの発明の実施の形態3に係る回転電機における巻線組立体が固定子鉄心に装着された状態を軸方向一端側から見た展開図であり、図31の(a)は第1巻線体の配置を示し、図31の(b)は第2巻線体の配置を示している。図32はこの発明の実施の形態3に係る回転電機における固定子巻線のU相巻線の結線方法を説明する模式図である。
なお、実施の形態3では、第1および第2の巻線体221,222に換えて、第1および第2巻線体411,412を用いている点を除いて、上記実施の形態1と同様に構成されている。
この実施の形態3では、全節巻線である第1巻線体411の第1直線部411aは、同じ相の他の第1巻線体411(電気角で180度位相のずれる他の第1巻線体411)の第2直線部411bと同じスロット13内に収納される。短節巻線である第2巻線体412の第1直線部412aは、他の相の第2巻線体412の第2直線部412bと同じスロット13内に収納される。これにより、電磁気的に短節巻きの回転電機が構成され、高次の高調波成分を抑制することができる。
ついで、図32に示されるように、U2-1BとU2-2A、U2-2BとU2-3A、U2-3BとU2-4A、U2-4BとU2-5A、U2-5BとU2-6A、U2-6BとU2-7A、U2-7BとU2-8Bを接続する。これにより、8本の第2巻線体412を直列に接続したU2相巻線が得られる。そして、U2-1AとU2-8BがU2相巻線の給電端(412in)および中性点(412n)となる。
図33はこの発明の実施の形態4に係る回転電機における巻線組立体が固定子鉄心に装着された状態を軸方向一端側から見た展開図であり、図33の(a)は第1巻線体の配置を示し、図33の(b)は第2巻線体の配置を示している。なお、図33では、第1コイルエンドを実線で示し、第2コイルエンドを点線で示している。また、図33では、便宜上、第1および第2コイルエンドを直線で示している。
なお、実施の形態4では、第1および第2の巻線体221,222に換えて、第1および第2巻線体421,422を用いている点を除いて、上記実施の形態1と同様に構成されている。
また、この実施の形態4においても、第1および第2頂部での径方向の変位量が、第1および第2直線部421a,421b,422a,422bの配列方向の全幅(4d)より小さいので、従来例に比べ、コイルエンド群の径方向寸法および軸方向寸法を小さくできる。
図34はこの発明の実施の形態5に係る回転電機における巻線組立体が固定子鉄心に装着された状態を軸方向一端側から見た展開図であり、図34の(a)は第1巻線体の配置を示し、図34の(b)は第2巻線体の配置を示している。なお、図34では、第1コイルエンドを実線で示し、第2コイルエンドを点線で示している。また、図34では、便宜上、第1および第2コイルエンドを直線で示している。
なお、実施の形態4では、第1および第2の巻線体221,222に換えて、第1および第2巻線体431,432を用いている点を除いて、上記実施の形態1と同様に構成されている。
また、この実施の形態5においても、第1および第2頂部での径方向の変位量が、第1および第2直線部431a,431b,432a,432bの配列方向の全幅(4d)より小さいので、従来例に比べ、コイルエンド群の径方向寸法および軸方向寸法を小さくできる。
また、上記各実施の形態では、8極48スロットの回転電機について説明しているが、極数およびスロット数は、8極48スロットに限定されないことは言うまでもないことである。また、スロット数が毎極毎相当たり2又は3の割合で形成されているものとしているが、毎極毎相当たりのスロット数は2以上であればよい。
また、上記各実施の形態では、長方形断面の導体線を用いて巻線体を作製しているが、円形断面の導体線を用いて巻線体を作製してもよい。この場合、導体線の曲げ加工が容易となる。
Claims (4)
- スロットが毎極毎相当たりn個(但し、nは2以上の自然数)の割合で形成された円環状の電機子鉄心、および上記電機子鉄心に装着された電機子巻線を備えた電機子を有する回転電機において、
上記電機子巻線は、それぞれ、絶縁被覆された、かつ接続部のない連続した導体線をm回(但し、mは2以上の自然数)巻き回して、直線部の端部間をコイルエンドで連結する螺旋状に構成され、かつ上記コイルエンドにより連結された上記直線部間の間隔が異なるn種類の巻線体を、対応するスロット対のそれぞれに装着して構成され、
上記n種類の巻線体は、隣り合うn対のスロット対に収納されて同心状になるように構成され、
上記コイルエンドは、連結された上記直線部間の略中央部に、径方向に所定量変位する頂部を有し、
上記頂部での径方向の変位量が、略a×d(但し、aは1以上、かつ(m-1)以下の自然数、dは上記スロット内に収納された上記直線部の径方向厚み)であり、上記スロット内には2×m本の2つの異なる種類の上記巻線体の直線部が径方向に1列に並んで収納されていることを特徴とする回転電機。 - 上記電機子巻線の各相巻線が、上記n種類の巻線体を直列に接続して形成された1本の巻線により構成されていることを特徴とする請求項1記載の回転電機。
- 上記電機子巻線の各相巻線が、それぞれ、上記n種類の巻線体の同じ種類の巻線体を直列に接続して形成されたn本の巻線により構成されていることを特徴とする請求項1記載の回転電機。
- 同心状になるように構成された上記n種類の巻線体は、径方向内方から見たときに、それぞれの巻線体の上記コイルエンドにより連結された上記直線部を相対する平行な2辺とする長方形の対角線の交点が一致していることを特徴とする請求項1から請求項3のいずれか1項に記載の回転電機。
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PCT/JP2013/053870 WO2014125646A1 (ja) | 2013-02-18 | 2013-02-18 | 回転電機 |
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JP6261809B2 (ja) * | 2015-04-15 | 2018-01-17 | 三菱電機株式会社 | 固定子および回転電機 |
DE112016002316T5 (de) * | 2015-05-22 | 2018-03-08 | Mitsubishi Electric Corp. | Elektrische Rotationsmaschine und Verfahren zu ihrer Herstellung |
WO2017159115A1 (ja) * | 2016-03-17 | 2017-09-21 | 本田技研工業株式会社 | ステータ及び導線巻回方法 |
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DE102019134793A1 (de) * | 2019-12-17 | 2021-06-17 | Valeo Siemens Eautomotive Germany Gmbh | Stator mit Pins für eine elektrische Maschine |
DE102019135426A1 (de) * | 2019-12-20 | 2021-06-24 | Valeo Siemens Eautomotive Germany Gmbh | Stator mit versetzen Pins für eine elektrische Maschine |
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- 2013-02-18 WO PCT/JP2013/053870 patent/WO2014125646A1/ja active Application Filing
- 2013-02-18 CN CN201380073209.4A patent/CN105191071B/zh active Active
- 2013-02-18 JP JP2015500079A patent/JP5805346B2/ja not_active Expired - Fee Related
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CN105191071A (zh) | 2015-12-23 |
CN105191071B (zh) | 2017-09-26 |
JP5805346B2 (ja) | 2015-11-04 |
JPWO2014125646A1 (ja) | 2017-02-02 |
US20150381001A1 (en) | 2015-12-31 |
DE112013006691T5 (de) | 2015-10-29 |
US10236738B2 (en) | 2019-03-19 |
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