WO2023109885A1 - Stator assembly and flat wire electric motor having multiple wires arranged in same slot layer - Google Patents
Stator assembly and flat wire electric motor having multiple wires arranged in same slot layer Download PDFInfo
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- WO2023109885A1 WO2023109885A1 PCT/CN2022/139200 CN2022139200W WO2023109885A1 WO 2023109885 A1 WO2023109885 A1 WO 2023109885A1 CN 2022139200 W CN2022139200 W CN 2022139200W WO 2023109885 A1 WO2023109885 A1 WO 2023109885A1
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- stator
- slot
- winding
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- same
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- 239000004020 conductor Substances 0.000 claims abstract description 167
- 238000004804 winding Methods 0.000 claims abstract description 142
- 239000002131 composite material Substances 0.000 claims description 11
- 238000009826 distribution Methods 0.000 abstract description 5
- 230000004907 flux Effects 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000011533 mixed conductor Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012938 design process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002500 effect on skin Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/48—Fastening of windings on the stator or rotor structure in slots
Definitions
- the application belongs to the technical field of flat wire motors, and in particular relates to a stator assembly with multiple wires in the same slot layer and a flat wire motor.
- Flat wire motor is a new type of winding method mainly researched by major motor manufacturers and developers. As the speed of flat wire motors is getting higher and higher, the number of layers in the stator slots of flat wire motors is increasing, and the aspect ratio of rectangular conductors is getting larger and larger, which makes it difficult to form conductors, turn heads, poor manufacturability, and slot utilization. Low, reducing the efficiency of the motor.
- the voltage drop between the enameled wires is relatively large in the high working voltage environment of the enameled flat wire motor, and the insulation and voltage resistance of the enameled wires is increasingly challenged.
- the present application provides a stator assembly
- the stator assembly includes a stator core and a stator winding;
- the stator core is generally cylindrical;
- several stator slots are arranged on the stator core, and the stator slots are arranged along
- the cores are arranged in sequence in the circumferential direction, forming a circular array; the winding of the stator winding adopts a rectangular conductor,
- Each stator slot is provided with several layers of combined conductor layer groups, and each layer of combined conductor layer groups in the same stator slot is arranged in sequence along the radial direction of the stator core;
- Each combined conductor layer group contains two or more than two rectangular conductors, and each group of rectangular conductors is sequentially arranged along the circumferential direction of the stator core.
- the aspect ratio of the rectangular conductors in the composite conductor layer group does not exceed 2.5.
- even-numbered composite conductor layers are arranged in the stator slot, or odd-numbered composite conductor layers are arranged in the stator slot.
- each independent conductor layer group contains only one rectangular conductor
- the combined conductor layer group and the independent conductor layer group in the same stator slot are arranged sequentially along the radial direction of the stator core; the independent conductor layer group is arranged close to the center of the stator core, and the combined conductor layer group is arranged near the outer wall of the stator core.
- the aspect ratio of the rectangular conductors in the independent conductor layer group does not exceed 3.
- stator winding includes one or more independent branches; in the same independent branch, the rectangular conductors located in different conductor layer groups are connected in series.
- the combined conductor layer group includes an even number of rectangular conductors, and the independent conductor layers are even-numbered layers.
- the combined conductor layer set near the outer wall of the stator core includes two rectangular wires, and the stator assembly is provided with n pairs of poles, each pole includes six stator slots, where n is an even number greater than or equal to 4;
- Each phase winding of the stator winding includes two branches, the first and the end of the two branches come out from the wire layer at the bottom of the slot, and the first ends of the two branches are located in the same pole; the winding of the two branches is in the stator iron The direction of extension on the core circumference is opposite.
- each branch is composed of several minimum balancing units connected in series, and the number of minimum balancing units connected in series in two branches in the same phase winding is the same.
- a minimum equalization unit is composed of four stacked winding coil units connected in series, and its windings span three consecutive poles, and all the wires in the slots of a minimum equalization unit are merged according to the slot levels to meet the requirements of four complete stators. slot space.
- the minimum equalization unit includes a first minimum balance unit and a second minimum balance unit; the windings of the first minimum balance unit and the second minimum balance unit extend in opposite directions on the circumference of the stator core; There are two branches, and a minimum equalization unit is used in each branch.
- the head ends of the two branches in the same phase winding are located in the same stator slot.
- the two branch windings have four beginnings and ends, and the two beginnings or ends with the closest distance are set as lead-out lines, and the remaining two are set as star-point lines.
- the present application also provides a flat-wire motor with multiple wires in the same slot layer, which includes a rotor assembly and the above-mentioned stator assembly, and the rotor assembly is located inside the stator assembly.
- the stator assembly proposed in this application reduces the aspect ratio of each rectangular conductor while ensuring that the total cross-sectional area of the conductors in the stator slot is similar, which is beneficial to the U-shaped line forming and has better manufacturability; at the same time, the stator is adjusted The length and width of each rectangular conductor in the slot, adjust the stator slot shape, adjust the radial distance of the stator slot by using the stator teeth, adjust the inner diameter of the stator, and adjust the stator yoke to make the magnetic density distribution of each part of the stator assembly reasonable and improve The slot full rate is improved, and the working efficiency of the motor is improved.
- the stator assembly proposed by this application reduces the number of conductor layers in the stator slot along the radial direction of the stator core, reduces the requirements for the twisting tooling, and improves the production quality and efficiency.
- the winding method of the winding is changed, so that the windings of the two branches in the same phase winding extend in opposite directions along the circumference of the stator core.
- the two branches in the same phase winding have the same number of minimum equalization units connected in series, so that the phase winding reaches a balanced circuit state.
- the three-phase winding star point line and the winding lead-out line are drawn from the bottom winding of the slot, which creates conditions for the internal connection and external connection lines of the motor winding to not occupy the axial space.
- Fig. 1 is the structural representation of flat wire motor in the related art
- Fig. 2 is an enlarged schematic diagram of part A in Fig. 1;
- Fig. 3 is a partial sectional view of a stator slot of a stator core of a flat wire motor in the related art
- Fig. 4 is a schematic structural view of a flat wire motor in which only combined conductor layer groups are arranged in the stator slot of the embodiment of the present application;
- FIG. 5 is a schematic structural view of a flat wire motor with independent conductor layer groups disposed in the stator slot of the embodiment of the present application;
- Figure 6 is an enlarged schematic view of part B in Figure 5;
- Fig. 7 is a partial cross-sectional view of the stator core with only the combined conductor layer group set in the unequal-width stator slot of the embodiment of the present application;
- Fig. 8 is a partial cross-sectional view of a stator core with an independent conductor layer group in a stator slot of unequal width according to an embodiment of the present application;
- Fig. 9 is a partial cross-sectional view of a stator core with three independent conductor layer groups in the unequal-width stator slot of the embodiment of the present application
- Fig. 10 is a partial cross-sectional view of a stator core with six independent conductor layer groups in a stator slot of unequal width according to an embodiment of the present application;
- Fig. 11 is a partial cross-sectional view of stator cores with one, two and three conductor composite layers in stator slots of unequal width according to the embodiment of the present application;
- Fig. 12 is a partial cross-sectional view of a stator core with two independent conductor layer groups in an equal-width stator slot in an embodiment of the present application;
- Fig. 13 shows a cross-sectional view of a stator slot with two independent conductor layer groups in the unequal-width stator slot of the embodiment of the present application
- Fig. 14 is a schematic diagram of partial expansion of the stator winding of the embodiment of the present application.
- Fig. 15 is an enlarged schematic diagram of part A in Fig. 14;
- FIG. 16 is a schematic diagram of the wiring of a minimum equalization unit in the embodiment of the present application.
- Fig. 17 is a schematic diagram of partial winding when the stator assembly has 8 poles and 48 slots and the number of branches is 2 in the embodiment of the present application.
- FIG 3 it is a partial cross-sectional view of some stator slots of the stator core of a flat-wire motor in the related art.
- Several layers of equal-sized rectangular conductors are arranged in sequence in each stator slot, and the utilization rate of the slots cannot be maximized.
- the ratio is 71.7% (pure copper).
- An embodiment of the present application provides a flat wire motor with multiple wires in the same slot layer, including a rotor assembly and a stator assembly, and the rotor assembly is located inside the stator assembly.
- the stator assembly includes a stator core 1 and a stator winding 2; Contains the motor rotor assembly.
- the stator core 1 is provided with a plurality of stator slots 3 , and the stator slots 3 are arranged in sequence along the circumferential direction of the stator core 1 in a ring-shaped array.
- the winding wires of the stator winding 2 adopt rectangular conductors, and the winding wires are evenly and symmetrically arranged in the stator slot 3 .
- the stator winding 2 includes a slot winding and an end winding.
- the slot winding refers to the rectangular conductor located in the stator slot;
- the end winding refers to the conductor located on both sides of the stator core 1, which is used to connect the slot windings in series to form a complete winding branch, which is divided into crown ends and solder ends.
- Each combined conductor layer group 4 includes two or more rectangular conductors, and the rectangular conductors in the same combined conductor layer group 4 are sequentially arranged along the circumferential direction of the stator core 1 .
- a plurality of rectangular conductors are arranged along the circumferential direction of the stator core. While ensuring that the total cross-sectional area of the conductors in the stator slot is similar, the aspect ratio of each rectangular conductor is reduced, which is beneficial to U-shaped Wire forming, better workmanship.
- each composite conductor layer group 4 is provided in each stator slot 4 along the radial direction of the stator core 1, and each composite conductor layer group 4 includes two rectangular conductors. .
- the aspect ratio of the rectangular conductors in the composite conductor layer group 4 may not exceed 2.5.
- the aspect ratio of the rectangular conductor is reduced, which effectively reduces the difficulty of the end-twisting process of the rectangular conductor in the combined conductor layer group 4, which is beneficial to the U-shaped line forming; and can improve the slot fullness rate, so that the slot fullness rate reaches 71.9% ( pure copper).
- one or more independent conductor layer groups 5 can also be arranged in each of the stator slots 3; the combined conductor layer group 4 and the independent conductor layer in the same stator slot 3 Group 5, arranged in sequence along the stator core 1 radial direction; the independent conductor layer group 5 is set close to the center of the stator core 1 (stator slot notch), and the combined conductor layer group 4 is located close to the outer wall of the stator core 1 (stator Slot bottom) setting.
- each independent conductor layer group 5 includes only one rectangular conductor.
- the independent conductor layer group 5 is arranged near the center 1 of the stator core, which effectively reduces the loss caused by the rectangular conductor.
- the loss includes AC loss and DC loss; AC loss is the loss related to the current frequency caused by skin effect, proximity effect, eddy current, etc., and DC loss is the product of the DC resistance of the conductor and the square of the current, which has nothing to do with the frequency of the current .
- the aspect ratio of the rectangular conductors in the independent conductor layer group 5 does not exceed 3. While ensuring that the rectangular conductor in the independent conductor layer group 5 produces less loss, it reduces the difficulty of the end twisting process of the rectangular conductor, which is beneficial to the U-shaped wire forming.
- stator winding 2 includes one or more independent branches. In the same independent branch, the rectangular conductors located in different layer groups are all connected in series.
- each stator slot 3 five layers of conductor layer groups are arranged radially along the stator core 1 .
- they are successively named as the first layer, the second layer, the third layer, the fourth layer and the fifth layer conductor layer group.
- the conductor layer groups of the first layer, the second layer, the third layer and the fourth layer are combined conductor layer groups 4, and each combined conductor layer group 4 is provided with two rectangular conductors, and the two rectangular conductors are arranged along the stator iron layer.
- the cores 1 are arranged in the circumferential direction, and the aspect ratio of each rectangular conductor is less than 2.5.
- the fifth conductor layer group is the conductor layer group closest to the center of the stator core 1, which is an independent conductor layer group 5, and the fifth conductor layer group is composed of a rectangular conductor whose aspect ratio is less than 3 .
- the combined arrangement of the combined conductor layer group 4 and the independent conductor layer group 5 is used to reduce the end twist of the rectangular conductor while ensuring that the rectangular conductor in the stator winding 2 produces less loss. Craft difficulty.
- the stator assembly adopts the arrangement of mixed conductors, which further improves the slot fullness rate, making the slot fullness rate reach 72.6% (pure copper).
- the The multi-layer conductor layer group in the center of the core can also be set as an independent conductor layer group, as shown in Fig. 9 and Fig. 10 , which will not be described in detail here.
- the aspect ratio of each rectangular conductor can be limited, and the number of rectangular conductors contained in each combined conductor layer group can be adjusted according to the fixed aspect ratio.
- the flat-wire motor with mixed conductor arrangement reduces the aspect ratio of each rectangular conductor while ensuring that the total cross-sectional area of the conductors in the stator slot is similar, which is beneficial to the U-shaped wire forming and has better manufacturability Good; at the same time, adjust the length and width of each rectangular conductor in the stator slot, adjust the stator slot shape, use the stator teeth, adjust the radial distance of the stator slot, adjust the inner diameter of the stator, and adjust the stator yoke to make the magnetic field of each part of the stator assembly
- the dense distribution is reasonable, which improves the slot full rate and the working efficiency of the motor.
- each original stator slot is provided with 9 layers of rectangular conductors along the radial direction of the stator core, which is optimized for each stator slot Inside, only 5 layers of rectangular conductors need to be set along the radial direction of the stator core.
- the number of conductors in the combined conductor layer can also be the base number. As shown in Figure 11, they are arranged in sequence along the radial direction of the stator core 1, followed by a combined conductor layer consisting of one layer of three conductors, four A combined conductor layer consisting of two conductors and an independent conductor layer.
- the technical solution of the embodiment of the present application reduces the requirements for the twisting tool, and the more conductor layers in the stator slot along the radial direction of the stator core, the better the effect of the mixed conductor arrangement proposed by the present application.
- the production difficulty or cost of the motor is greatly reduced.
- the stator slots are set at equal widths, and the stator slots are provided with three combined conductor layer groups 4 and two independent conductor layer groups 5 , accommodating 8 rectangular conductors in total.
- the dimensions of the rectangular conductors in the three-layer composite conductor layer group 4 are all the same, and the dimensions of the rectangular conductors in the two independent conductor layer groups 5 are all the same, so the windings in the slots are only divided into two types.
- the method of multi-line arrangement in the same slot layer of the present application not only optimizes the number of conductor layers along the radial direction of the stator core, but also optimizes the types of lines, further reducing the difficulty of the production process.
- the shape of the teeth for magnetic conduction in the stator is trapezoidal, and the tooth width is the smallest near the inner circle of the iron core, and the tooth width is the smallest near the outer circle. The width is the largest.
- This design results in a very uneven magnetic density distribution on the teeth.
- the magnetic density of the teeth near the inner circle is very saturated, the magnetic density of the teeth near the outer circle is very low, which is a waste of space.
- the width of the wire near the outer circle is much higher than that of the wire near the inner circle, and the thickness of the wire near the outer circle is obviously thinner than that near the inner circle. location of the wire.
- the width-to-thickness ratio of the wire near the outer circle is too large.
- the insulating layer area of the wire in the slot is too large, sacrificing the pure copper filling rate of the slot; If the bending radius is too large, the end dimension of the winding will be significantly longer than the parallel slot when the stepped slot design is adopted.
- two or more conductors on the same layer at the bottom of the stator slot are designed to replace the originally required over-flat shape (too large in width-to-thickness ratio) conductors with partial square conductors to improve the fullness of the pure copper slot and effectively reduce the Winding end dimensions.
- the stepped slot structure is adopted, the effect of the trapezoidal slot of the slot is realized, the motor wires are arranged in a square shape, and the uniform distribution of the magnetic density of the teeth can be realized, and the space utilization rate of the motor is further greatly improved.
- Another embodiment of the present application provides a low-slot pressure drop stator assembly and a motor based on a double split structure, and the motor includes a stator assembly.
- the stator assembly includes a stator core and a stator winding.
- Several stator slots are arranged on the stator core along its circumferential direction.
- the stator winding is a three-phase winding, and its winding adopts a rectangular wire, and the winding The wires are laid out in the form of lapped windings.
- Two rectangular wires are arranged in the wire layer at the bottom of each stator slot, and the two rectangular wires are arranged in sequence along the circumferential direction of the stator core, that is, a double-split structure.
- each stator slot the naming directions of the wires in each stator slot are the same.
- several layers of wire layers are sequentially arranged in each stator slot along the radial direction of the stator iron core, and the wire layer at the bottom of the slot is the layer of wire layers closest to the outer wall of the stator iron core in the designated sub-slot.
- the wires are named in sequence according to the direction from the bottom of the slot to the slot opening and from left to right. are L1, L2, L3, ..., L8. Wherein, the wire L1 and the wire L2 are arranged in the wire layer at the bottom of the slot.
- each pole includes six stator slots, wherein, n is an even number greater than or equal to 4; each phase winding includes two branches, denoted as branch one and branch Road 2: The first and last ends of the two branches come out from the conductor layer at the bottom of the slot, and the first ends of the two branches are located in the same pole; the windings of the two branches extend in opposite directions on the circumference of the stator core.
- the three-phase winding star point line and the winding lead-out line are drawn from the bottom winding of the slot, which creates conditions for the internal connection and external connection of the motor winding without occupying axial space.
- the winding expansion diagram is sequentially named from left to right: P1, P2, P3, . . . , P2n.
- the head ends of the two branches in the one-phase winding are both located at the P1 pole.
- Each pole includes six stator slots, ie each pole includes two slots per phase.
- stator slot No. 37 and stator slot No. 38 belong to the same pole and phase.
- the two stator slots with the same pole and phase can be named Q1 slot and Q2 slot respectively according to the direction from left to right in the figure.
- the No. 37 stator slot is the Q1 slot
- the No. 38 stator slot is the Q2 slot.
- the naming direction of each pole slot is the same.
- each branch is composed of several minimum balancing units connected in series, and the number of minimum balancing units connected in series in two branches in the same phase winding is the same.
- the smallest equalization unit refers to a sub-winding structure composed of winding elements of different phases, ie layers.
- a branch winding of a motor phase winding has several such sub-winding structures in series, and as long as the number of sub-windings connected in series is equal between different branches, then the phase winding of the motor can be ensured.
- the windings of the motor are the same in phase and inductance (that is, the motor winding is a balanced winding)
- a minimum equalization unit is composed of four stacked winding coil units connected in series, and its winding spans three consecutive poles, and all the wires in the slots of a minimum equalization unit are combined according to the slot levels to meet the requirements of four complete stators. slot space.
- the four stacked winding coil units contained in a minimum equalization unit are: the winding between the No. 26 stator slot and the No. 32 stator slot, the No. 31 stator slot and the No. 37 stator slot The winding between the No. 32 stator slot and the No. 38 stator slot, the winding between the No. 37 stator slot and the No. 43 stator slot. And the winding of the smallest equalization unit spans three poles between the No. 26 stator slot and the No. 43 stator slot.
- the wires in the slots passed by each stacked winding coil unit are combined to satisfy a complete stator slot space.
- the wires in the slot passing through the No. 26 stator slot are L2, L3, L4, and L7; the wires passing through the No. 32 stator slot are L1 , L5, L6, L8; after the wires in the two stator slots are merged according to the wire numbers, it just corresponds to the position of 8 wires in a complete slot.
- the corresponding wires in the slots of the other stacked coil units after combining them according to the numbers of the wires, they also just correspond to the positions of the 8 wires in a complete slot.
- the winding mode of the winding is changed by using the double wire layout of the wire layer at the bottom of the stator slot, so that the windings of the two branches in the same phase winding extend in opposite directions along the circumference of the stator core.
- the two branches in the same phase winding have the same number of minimum equalization units connected in series, so that the phase winding reaches a balanced circuit state.
- winding heads of the two branches are set in the same stator slot or in the same pole, and the winding head and end of one branch span enough stator slots to realize the reduction of the stator slot. The effect of the highest slot pressure drop between all conductors.
- head end and the end are relative names, that is, one end of the branch winding is the head end, and the other end is the end end, which is not specifically limited.
- the minimum equalization unit is divided into a first minimum balance unit and a second minimum balance unit; the windings of the first minimum balance unit and the second minimum balance unit extend in opposite directions on the circumference of the stator core.
- a minimum equalization unit is used in each branch. That is, two branches in the same phase winding (set as branch 1 and branch 2 for the convenience of description), branch 1 is composed of several first minimum equalization units connected in series, and branch 2 is composed of several second minimum equalization units The units are connected in series.
- the slots passed by the two branches are the same, and they are mutually balanced windings.
- the wire in the slot is defined as PnQcLm, which means the Lm wire in the Qc slot under the Pn pole.
- n ⁇ 4 and n is an even number;
- c is equal to 1 or 2;
- the winding path of a first minimum equalization unit in branch one is:
- P1Q2L2 (head)->P2Q2L1->P1Q2L3->...->P1Q2L(m-1)->P2Q2Lm->P3Q2Lm->P2Q2L(m-1)->P3Q2L(m-)...>P1Q2Lm->P2Q2L3- >P3Q2L1->P2Q1L2->P3Q1L2->P4Q1L1->P3Q1L3->...->P3Q1L(m-1)->P4Q1Lm->P3Q1Lm->P2Q1L(m-1)->P3Q1L(m-2)->... -> P2Q1L3 -> P3Q1L1 -> P2Q2L2 (end) -> (another first minimum equalization unit head end).
- the winding path of a second minimum equalization unit in branch two is:
- the winding path of a second minimum equalization unit in branch two is:
- stator assembly has 8 poles and 48 slots, and the number of branches is 2, in the same phase winding, branch one is connected in series by two first minimum equalization units, and branch two is composed of two second minimum equalization units. Units are connected in series. In this way, half of the windings of the two branches share the same slot, and the slot voltage drop of the motor is reduced by half.
- stator assembly has 12 poles and 72 slots, and the number of branches is 2, in the same phase winding, branch one is connected in series with three first minimum equalization units, and branch two is connected in series with three second minimum balance units. In this way, half of the windings of the two branches share the same slot, and the slot voltage drop of the motor is reduced to less than 1/3. By analogy this time, the more the number of pole slots of the motor, the greater the slot pressure drop.
- the winding path of a first minimum equalization unit in branch one is: P1Q2L2->P2Q2L1->P1Q2L3->...->P1Q2L(m-1)->P2Q2Lm->P3Q2Lm->P2Q2L(m- 1)->P3Q2L(m-2)->...>P2Q2L3->P3Q2L1->P2Q1L2->P3Q1L2->P4Q1L1->P3Q1L3->...->P3Q1Lm->P2Q1L(m-1)->P3Q1L(m- 2)->P2Q1L3->P3Q1L1->P2Q2L2->(another first minimum unit unit head end).
- the winding path of a second smallest equalization unit in branch two is: P1Q2L1->P2Q1L1->P1Q1L3->...->P1Q1Lm->P(2n)Q2L(m-1)->P1Q2L(m-2)- >...->P(2n)Q2L3->P1Q1L2->P(2n)Q1L2->P(2n-1)Q2L2->P(2n)Q2L1->P(2n-1)Q2L3->...P(2n -1) Q2L(m-1)->P(2n)Q2Lm->P1Q2Lm->P(2n)Q1L(m-1)->P1Q1L(m-2)->...->P(2n)Q1L3- >P1Q1L1->P(2n)Q2L2->(the head end of another second minimum equalization unit).
- the head ends of the two branches are set in the same stator slot, the windings extend oppositely, and the ends of the two branches are located in the same slot with different poles.
- each branch When the stator assembly has 8 poles and 48 slots, the number of branches is 2, the head ends of each branch are in the same stator slot, and the sequence of the smallest equalization unit is similar in series, each branch reduces the voltage drop of two stacked coil units, The maximum tank pressure drop can be further reduced to within 1/4 phase pressure drop.
- the two branch windings have four beginnings and ends, and the two beginnings or ends with the closest distance are set as lead-out lines, and the remaining two are set as star-point lines. In this way, the outgoing wires of the three-phase windings can be controlled within the range of one pole, reducing the occupied angular space.
- the double wire layout at the bottom of the stator slot is used to change the winding mode of the winding, so that the winding of the two branches in the same phase winding follows the circumferential direction of the stator core. extend in the opposite direction.
- the two branches in the same phase winding have the same number of minimum equalization units connected in series, so that the phase winding reaches a balanced circuit state.
- the three-phase winding star point line and the winding lead-out line are drawn from the bottom winding of the slot, which creates conditions for the internal connection and external connection lines of the motor winding to not occupy the axial space.
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- Windings For Motors And Generators (AREA)
Abstract
The present application relates to the technical field of flat wire electric motors, and particularly to a stator assembly and flat wire electric motor having multiple wires arranged in the same slot layer. The stator assembly comprises a stator core and a stator winding, wherein the stator core is substantially cylindrical; a plurality of stator slots are provided in the stator core; and a plurality of combined conductor layer groups are arranged in each stator slot. Compared with the prior art, the stator assembly provided in the present application can allow the length-width ratio of each rectangular conductor to be reduced, while ensuring that the total sectional areas of conductors in the stator slots are similar, so that U-shaped wire forming is facilitated, and the manufacturability of same is better. In addition, the length and width of each rectangular conductor in the stator slots and the shape of the stator slot are adjusted, and the radial distance of the stator slot, the inner diameter of a stator, and a stator yoke portion are adjusted by means of a stator toothing, so that the flux density distribution of each part of the stator assembly is reasonable, the slot filling rate is improved, and the working efficiency of the electric motor is improved.
Description
本申请属于扁线电机技术领域,特别涉及一种同槽层多线的定子组件及扁线电机。The application belongs to the technical field of flat wire motors, and in particular relates to a stator assembly with multiple wires in the same slot layer and a flat wire motor.
扁线电机是当前各大电机生产、开发商主要研究的一种新型绕组方法。随着扁线电机的转速越来越高,扁线电机定子槽内的层数越来越多,矩形导体长宽比越来越大,使导体成型困难、扭头困难、工艺性差、槽利用率低、降低了电机的效率。Flat wire motor is a new type of winding method mainly researched by major motor manufacturers and developers. As the speed of flat wire motors is getting higher and higher, the number of layers in the stator slots of flat wire motors is increasing, and the aspect ratio of rectangular conductors is getting larger and larger, which makes it difficult to form conductors, turn heads, poor manufacturability, and slot utilization. Low, reducing the efficiency of the motor.
且现有的扁线电机方案中,采用漆包扁线的电机在高工作电压的环境下,漆包线之间的压降较大,漆包线的绝缘耐压能力越来越受到挑战。Moreover, in the existing flat wire motor scheme, the voltage drop between the enameled wires is relatively large in the high working voltage environment of the enameled flat wire motor, and the insulation and voltage resistance of the enameled wires is increasingly challenged.
发明内容Contents of the invention
针对上述问题,本申请提供了一种定子组件,定子组件包括定子铁芯和定子绕组;定子铁芯大致上呈现为圆筒状;定子铁芯上设置有若干个定子槽,定子槽沿定子铁芯圆周方向依次排布,呈环形阵列状;定子绕组的绕线采用矩形导体,In view of the above problems, the present application provides a stator assembly, the stator assembly includes a stator core and a stator winding; the stator core is generally cylindrical; several stator slots are arranged on the stator core, and the stator slots are arranged along The cores are arranged in sequence in the circumferential direction, forming a circular array; the winding of the stator winding adopts a rectangular conductor,
每个定子槽内设置有若干层组合导体层组,同一定子槽内的各层组合导体层组沿定子铁芯径向依次排布;Each stator slot is provided with several layers of combined conductor layer groups, and each layer of combined conductor layer groups in the same stator slot is arranged in sequence along the radial direction of the stator core;
每层组合导体层组中包含有两根或两根以上的矩形导体,且各组矩形导体沿定子铁芯圆周向依次排布。Each combined conductor layer group contains two or more than two rectangular conductors, and each group of rectangular conductors is sequentially arranged along the circumferential direction of the stator core.
进一步的,组合导体层组内的矩形导体的长宽比不超过2.5。Further, the aspect ratio of the rectangular conductors in the composite conductor layer group does not exceed 2.5.
进一步的,定子槽内设有偶数层组合导体层,或者,定子槽内设有奇数层组合导体层。Further, even-numbered composite conductor layers are arranged in the stator slot, or odd-numbered composite conductor layers are arranged in the stator slot.
进一步的,每个定子槽内还设置有一层或多层独立导体层组,每层独立导体层组中只包含一根矩形导体;Further, one or more independent conductor layer groups are arranged in each stator slot, and each independent conductor layer group contains only one rectangular conductor;
同一定子槽内的组合导体层组和独立导体层组,沿定子铁芯径向依次 排布;独立导体层组靠近定子铁芯中心设置,组合导体层组靠近定子铁芯外壁设置。The combined conductor layer group and the independent conductor layer group in the same stator slot are arranged sequentially along the radial direction of the stator core; the independent conductor layer group is arranged close to the center of the stator core, and the combined conductor layer group is arranged near the outer wall of the stator core.
进一步的,独立导体层组内的矩形导体的长宽比不超过3。Further, the aspect ratio of the rectangular conductors in the independent conductor layer group does not exceed 3.
进一步的,定子绕组包括一个或多个独立支路;在同一独立支路中,位于不同导体层组内的矩形导体之间,为串联关系。Further, the stator winding includes one or more independent branches; in the same independent branch, the rectangular conductors located in different conductor layer groups are connected in series.
进一步的,组合导体层组包含偶数根矩形导体,独立导体层为偶数层。Further, the combined conductor layer group includes an even number of rectangular conductors, and the independent conductor layers are even-numbered layers.
进一步的,靠近定子铁芯外壁设置的组合导体层组包括两根矩形导线,定子组件上设置有n对极,每极包括六个定子槽,其中,n为大于或等于4的偶数;Further, the combined conductor layer set near the outer wall of the stator core includes two rectangular wires, and the stator assembly is provided with n pairs of poles, each pole includes six stator slots, where n is an even number greater than or equal to 4;
定子绕组的每相绕组包括两条支路,两条支路的首末端均从槽底导线层出线,且两条支路的首端位于同一极内;两条支路的绕线在定子铁芯圆周上延伸的方向相反。Each phase winding of the stator winding includes two branches, the first and the end of the two branches come out from the wire layer at the bottom of the slot, and the first ends of the two branches are located in the same pole; the winding of the two branches is in the stator iron The direction of extension on the core circumference is opposite.
进一步的,每条支路由若干个最小均衡单元串联构成,且同一相绕组中的两条支路各自串联的最小均衡单元的数量相同。Further, each branch is composed of several minimum balancing units connected in series, and the number of minimum balancing units connected in series in two branches in the same phase winding is the same.
进一步的,一个最小均衡单元由四个叠绕组线圈单元串联而成,其绕线跨越连续的三个极,且一个最小均衡单元的所有槽内导线按槽层位合并后,满足四个完整定子槽空间。Furthermore, a minimum equalization unit is composed of four stacked winding coil units connected in series, and its windings span three consecutive poles, and all the wires in the slots of a minimum equalization unit are merged according to the slot levels to meet the requirements of four complete stators. slot space.
进一步的,最小均衡单元包括第一最小均衡单元和第二最小均衡单元;第一最小均衡单元和第二最小均衡单元的绕线,在定子铁芯圆周上延伸的方向相反;同一相绕组中的两条支路,每条支路中采用一种最小均衡单元。Further, the minimum equalization unit includes a first minimum balance unit and a second minimum balance unit; the windings of the first minimum balance unit and the second minimum balance unit extend in opposite directions on the circumference of the stator core; There are two branches, and a minimum equalization unit is used in each branch.
进一步的,同一相绕组中的两条支路的首端位于同一定子槽内。Further, the head ends of the two branches in the same phase winding are located in the same stator slot.
进一步的,同一相绕组中,两条支路绕线有四个首末端,将距离近的两个首端或末端设置为引出线,其余两个设置为星点线。Further, in the same phase winding, the two branch windings have four beginnings and ends, and the two beginnings or ends with the closest distance are set as lead-out lines, and the remaining two are set as star-point lines.
本申请还提供了一种同槽层多线的扁线电机,包括转子组件和上述定子组件,转子组件位于定子组件内侧。The present application also provides a flat-wire motor with multiple wires in the same slot layer, which includes a rotor assembly and the above-mentioned stator assembly, and the rotor assembly is located inside the stator assembly.
本申请的有益效果是:The beneficial effect of this application is:
1.本申请提出的定子组件,在保证定子槽内的导体总的截面积相近的情况下,减小各矩形导体的长宽比,有利于U型线成型,工艺性更好;同时 调整定子槽内各矩形导体的长和宽、调整定子槽型、利用定子齿部,调整定子槽沿径向的距离、调整定子内径、调整定子轭部,使定子组件各部位的磁密分布合理,提高了槽满率,提高了电机的工作效率。1. The stator assembly proposed in this application reduces the aspect ratio of each rectangular conductor while ensuring that the total cross-sectional area of the conductors in the stator slot is similar, which is beneficial to the U-shaped line forming and has better manufacturability; at the same time, the stator is adjusted The length and width of each rectangular conductor in the slot, adjust the stator slot shape, adjust the radial distance of the stator slot by using the stator teeth, adjust the inner diameter of the stator, and adjust the stator yoke to make the magnetic density distribution of each part of the stator assembly reasonable and improve The slot full rate is improved, and the working efficiency of the motor is improved.
2.本申请提出的定子组件,减少了定子槽内沿定子铁芯径向的导体层数,降低了对扭头工装的要求,提高了生产质量和效率。2. The stator assembly proposed by this application reduces the number of conductor layers in the stator slot along the radial direction of the stator core, reduces the requirements for the twisting tooling, and improves the production quality and efficiency.
3.利用定子槽槽底层的双拼导线布局,改变了绕组的绕线方式,使同一相绕组中两条支路的绕线,沿定子铁芯圆周向,呈相反方向延伸。并且同一相绕组中的两条支路,各自串联的最小均衡单元的数量相同,使得该相绕组达到均衡电路状态。3. Utilizing the layout of double wires at the bottom of the stator slot, the winding method of the winding is changed, so that the windings of the two branches in the same phase winding extend in opposite directions along the circumference of the stator core. In addition, the two branches in the same phase winding have the same number of minimum equalization units connected in series, so that the phase winding reaches a balanced circuit state.
4.将两条支路的绕线首端设置在同一定子槽内或同一极内,且一条支路的绕线首末端之间,跨越足够多的定子槽,实现了降低定子槽内的所有导线之间的最高槽压降的效果。4. Set the winding heads of the two branches in the same stator slot or in the same pole, and the winding head and end of a branch span enough stator slots to reduce the stator slot. The effect of the highest slot pressure drop between all conductors.
5.三相绕组星点线和绕组引出线均从槽底层绕组引出,给电机绕组内部连接和对外连接线均不占用轴向空间创造了条件。5. The three-phase winding star point line and the winding lead-out line are drawn from the bottom winding of the slot, which creates conditions for the internal connection and external connection lines of the motor winding to not occupy the axial space.
本申请的其它特征和优点将在随后的说明书中阐述,并且,部分地从说明书中变得显而易见,或者通过实施本申请而了解。本申请的目的和其他优点可通过在说明书、权利要求书以及附图中所指出的结构来实现和获得。Additional features and advantages of the application will be set forth in the description which follows, and, in part, will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application may be realized and attained by the structure pointed out in the written description, claims hereof as well as the appended drawings.
为了更清楚地说明本申请实施例或相关技术中的技术方案,下面将对实施例或相关技术描述中所需要使用的附图作一简单地介绍,显而易见地,下面描述中的附图是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings that need to be used in the descriptions of the embodiments or related technologies. Obviously, the drawings in the following description are the For some embodiments of the application, those skilled in the art can also obtain other drawings based on these drawings without creative work.
图1为相关技术中扁线电机的结构示意图;Fig. 1 is the structural representation of flat wire motor in the related art;
图2为图1中的A部放大示意图;Fig. 2 is an enlarged schematic diagram of part A in Fig. 1;
图3为相关技术中扁线电机定子铁芯的部分定子槽局部截面图;Fig. 3 is a partial sectional view of a stator slot of a stator core of a flat wire motor in the related art;
图4为本申请实施例的定子槽内仅设置组合导体层组的扁线电机的结构示意图;Fig. 4 is a schematic structural view of a flat wire motor in which only combined conductor layer groups are arranged in the stator slot of the embodiment of the present application;
图5为本申请实施例的定子槽内设置有独立导体层组的扁线电机的结构示意图;5 is a schematic structural view of a flat wire motor with independent conductor layer groups disposed in the stator slot of the embodiment of the present application;
图6为图5中的B部放大示意图;Figure 6 is an enlarged schematic view of part B in Figure 5;
图7为本申请实施例的不等宽定子槽内仅设置有组合导体层组的定子铁芯的局部剖视图;Fig. 7 is a partial cross-sectional view of the stator core with only the combined conductor layer group set in the unequal-width stator slot of the embodiment of the present application;
图8为本申请实施例的不等宽定子槽内有一层独立导体层组的定子铁芯的局部剖视图;Fig. 8 is a partial cross-sectional view of a stator core with an independent conductor layer group in a stator slot of unequal width according to an embodiment of the present application;
图9为本申请实施例的不等宽定子槽内有三层独立导体层组的定子铁芯的局部剖视图Fig. 9 is a partial cross-sectional view of a stator core with three independent conductor layer groups in the unequal-width stator slot of the embodiment of the present application
图10为本申请实施例的不等宽定子槽内有六层独立导体层组的定子铁芯的局部剖视图;Fig. 10 is a partial cross-sectional view of a stator core with six independent conductor layer groups in a stator slot of unequal width according to an embodiment of the present application;
图11为本申请实施例的不等宽定子槽内有一根、两根及三根导体组合层的定子铁芯的局部剖视图;Fig. 11 is a partial cross-sectional view of stator cores with one, two and three conductor composite layers in stator slots of unequal width according to the embodiment of the present application;
图12为本申请实施例的等宽定子槽内有两层独立导体层组的定子铁芯的局部剖视图;Fig. 12 is a partial cross-sectional view of a stator core with two independent conductor layer groups in an equal-width stator slot in an embodiment of the present application;
图13示出本申请实施例的不等宽定子槽内有两层独立导体层组的定子槽截面图;Fig. 13 shows a cross-sectional view of a stator slot with two independent conductor layer groups in the unequal-width stator slot of the embodiment of the present application;
图14为本申请实施例的定子绕组局部展开示意图;Fig. 14 is a schematic diagram of partial expansion of the stator winding of the embodiment of the present application;
图15为图14中的A部放大示意图;Fig. 15 is an enlarged schematic diagram of part A in Fig. 14;
图16为本申请实施例的一个最小均衡单元的绕线示意图;FIG. 16 is a schematic diagram of the wiring of a minimum equalization unit in the embodiment of the present application;
图17为本申请实施例中当定子组件为8极48槽,支路数为2时的局部绕线示意图。Fig. 17 is a schematic diagram of partial winding when the stator assembly has 8 poles and 48 slots and the number of branches is 2 in the embodiment of the present application.
图中:1-定子铁芯;2-定子绕组;3-定子槽;4-组合导体层组;5-独立导体层组。In the figure: 1-stator core; 2-stator winding; 3-stator slot; 4-combined conductor layer group; 5-independent conductor layer group.
为使本申请实施例的目的、技术方案和优点更加清楚,下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地说明,显然,所描述的实施例是本申请一部分实施例,而不是全部的实施例。 基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
如图1和2所示,为相关技术扁线电机常用的绕组方式,采用的矩形导体长宽比过大。当长宽比大于3.5,在对矩形导体的端部进行扭头焊接时,扭头部分的内侧受到挤压容易产生褶皱,扭头部分的外侧受到拉伸容易断裂。因此现有扁线电机存在定子绕组折弯半径大、皇冠端成型困难、工艺性差等问题。As shown in Figures 1 and 2, it is a commonly used winding method for flat wire motors in the related art, and the aspect ratio of the rectangular conductor used is too large. When the aspect ratio is greater than 3.5, when the end of the rectangular conductor is twisted and welded, the inner side of the twisted part is squeezed and easily wrinkled, and the outer side of the twisted part is stretched and easily broken. Therefore, existing flat wire motors have problems such as large bending radius of the stator winding, difficulty in forming the crown end, and poor manufacturability.
另外,如图3所示,为相关技术扁线电机定子铁芯的部分定子槽局部截面图,各定子槽内依次排布有若干层等尺寸矩形导体,槽利用率无法实现最大化,槽满率为71.7%(纯铜)。In addition, as shown in Figure 3, it is a partial cross-sectional view of some stator slots of the stator core of a flat-wire motor in the related art. Several layers of equal-sized rectangular conductors are arranged in sequence in each stator slot, and the utilization rate of the slots cannot be maximized. The ratio is 71.7% (pure copper).
此外,在申请人发现扁线电机所采用的漆包线的绝缘耐压能力越来越受到挑战。若能降低同槽内导线之间的压降,对提高电机绕组工作的可靠性十分有利;另外,在电机应用中,需要考虑使电机定子的空间利用率越来越高,在一些特殊场合,希望电机的引出线不占用轴向空间。In addition, the applicant found that the insulation withstand voltage capability of the enameled wire used in the flat wire motor is increasingly challenged. If the voltage drop between the wires in the same slot can be reduced, it will be very beneficial to improve the reliability of the motor winding; in addition, in the application of the motor, it is necessary to consider increasing the space utilization of the motor stator. In some special occasions, It is hoped that the lead wire of the motor does not occupy the axial space.
本申请实施例提供了一种同槽层多线的扁线电机,包括转子组件和定子组件,所述转子组件位于所述定子组件内侧。An embodiment of the present application provides a flat wire motor with multiple wires in the same slot layer, including a rotor assembly and a stator assembly, and the rotor assembly is located inside the stator assembly.
具体的,如图4、图5和图6所示,所述定子组件包括定子铁芯1和定子绕组2;所述定子铁芯1大致上呈现为圆筒状,以便于在定子铁芯1内容纳电机转子组件。所述定子铁芯1上设置有若干个定子槽3,所述定子槽3沿所述定子铁芯1圆周方向依次排布,呈环形阵列状。所述定子绕组2的绕线采用矩形导体,所述绕线均匀对称排列于所述定子槽3内。Specifically, as shown in Fig. 4, Fig. 5 and Fig. 6, the stator assembly includes a stator core 1 and a stator winding 2; Contains the motor rotor assembly. The stator core 1 is provided with a plurality of stator slots 3 , and the stator slots 3 are arranged in sequence along the circumferential direction of the stator core 1 in a ring-shaped array. The winding wires of the stator winding 2 adopt rectangular conductors, and the winding wires are evenly and symmetrically arranged in the stator slot 3 .
具体的,所述定子绕组2包括槽内绕组和端部绕组。所述槽内绕组是指位于定子槽内的矩形导体;所述端部绕组是指位于定子铁芯1两侧端,用于串联槽内绕组以构成完整绕组支路的导体,分为皇冠端和焊接端。Specifically, the stator winding 2 includes a slot winding and an end winding. The slot winding refers to the rectangular conductor located in the stator slot; the end winding refers to the conductor located on both sides of the stator core 1, which is used to connect the slot windings in series to form a complete winding branch, which is divided into crown ends and solder ends.
进一步的,如图7所示,每个所述定子槽3内设置有若干层组合导体层组4,同一定子槽内的各层组合导体层组4沿定子铁芯径向依次排布。Further, as shown in FIG. 7 , several combined conductor layer groups 4 are arranged in each of the stator slots 3 , and the combined conductor layer groups 4 in the same stator slot are arranged sequentially along the radial direction of the stator core.
每层所述组合导体层组4中包含有两根或两根以上的矩形导体,且同一组合导体层组4中的各矩形导体沿定子铁芯1圆周向依次排布。Each combined conductor layer group 4 includes two or more rectangular conductors, and the rectangular conductors in the same combined conductor layer group 4 are sequentially arranged along the circumferential direction of the stator core 1 .
在同一定子槽内,沿定子铁芯圆周向,设置多个矩形导体,在保证定子槽内的导体总的截面积相近的情况下,减小各矩形导体的长宽比,有利于U型线成型,工艺性更好。In the same stator slot, a plurality of rectangular conductors are arranged along the circumferential direction of the stator core. While ensuring that the total cross-sectional area of the conductors in the stator slot is similar, the aspect ratio of each rectangular conductor is reduced, which is beneficial to U-shaped Wire forming, better workmanship.
示例性的,如图7所示,每个所述定子槽4内沿定子铁芯1径向,设置有四层组合导体层组4,每层所述组合导体层组4包括两根矩形导体。Exemplarily, as shown in FIG. 7, four composite conductor layer groups 4 are provided in each stator slot 4 along the radial direction of the stator core 1, and each composite conductor layer group 4 includes two rectangular conductors. .
所述组合导体层组4中的矩形导体的长宽比可以不超过2.5。矩形导体的长宽比减小,有效的降低了组合导体层组4内矩形导体的端部扭头工艺难度,有利于U型线成型;并且能够提高槽满率,使槽满率达到71.9%(纯铜)。The aspect ratio of the rectangular conductors in the composite conductor layer group 4 may not exceed 2.5. The aspect ratio of the rectangular conductor is reduced, which effectively reduces the difficulty of the end-twisting process of the rectangular conductor in the combined conductor layer group 4, which is beneficial to the U-shaped line forming; and can improve the slot fullness rate, so that the slot fullness rate reaches 71.9% ( pure copper).
通过设置组合导体层组,使同一定子槽的同层设置多个矩形导体,在保证定子槽内的导体总的截面积相近的情况下,减小各矩形导体的长宽比,有利于U型线成型,工艺性更好;同时调整定子槽内各矩形导体的长和宽、调整定子槽型、利用定子齿部,调整定子槽沿径向的距离、调整定子内径、调整定子轭部,使定子组件各部位的磁密分布合理,提高槽利用率,提高了电机的工作效率。By setting the combined conductor layer group, multiple rectangular conductors are arranged on the same layer of the same stator slot, and the aspect ratio of each rectangular conductor is reduced while ensuring that the total cross-sectional area of the conductors in the stator slot is similar, which is beneficial to U Shaped line forming, better workmanship; at the same time adjust the length and width of each rectangular conductor in the stator slot, adjust the stator slot shape, use the stator teeth, adjust the radial distance of the stator slot, adjust the inner diameter of the stator, adjust the stator yoke, The magnetic density distribution of each part of the stator assembly is made reasonable, the slot utilization rate is improved, and the working efficiency of the motor is improved.
进一步的,如图8-图13所示,每个所述定子槽3内还可设置一层或多层独立导体层组5;同一定子槽3内的组合导体层组4和独立导体层组5,沿定子铁芯1径向依次排布;所述独立导体层组5靠近定子铁芯1中心(定子槽槽口)设置,所述组合导体层组4靠近定子铁芯1外壁(定子槽槽底)设置。Further, as shown in Figures 8-13, one or more independent conductor layer groups 5 can also be arranged in each of the stator slots 3; the combined conductor layer group 4 and the independent conductor layer in the same stator slot 3 Group 5, arranged in sequence along the stator core 1 radial direction; the independent conductor layer group 5 is set close to the center of the stator core 1 (stator slot notch), and the combined conductor layer group 4 is located close to the outer wall of the stator core 1 (stator Slot bottom) setting.
具体的,每层所述独立导体层组5中只包含一根矩形导体。在靠近定子铁芯中心1的位置设置独立导体层组5,有效的降低了矩形导体产生的损耗。所述损耗包括交流损耗和直流损耗;其中交流损耗为集肤效应、邻近效应、涡流等导致的和电流频率有关的损耗,直流损耗为导体的直流电阻和电流平方的乘积,和电流的频率无关。Specifically, each independent conductor layer group 5 includes only one rectangular conductor. The independent conductor layer group 5 is arranged near the center 1 of the stator core, which effectively reduces the loss caused by the rectangular conductor. The loss includes AC loss and DC loss; AC loss is the loss related to the current frequency caused by skin effect, proximity effect, eddy current, etc., and DC loss is the product of the DC resistance of the conductor and the square of the current, which has nothing to do with the frequency of the current .
所述独立导体层组5内的矩形导体的长宽比不超过3。在保证独立导体层组5内的矩形导体产生较小的损耗的同时,降低了该矩形导体的端部扭头工艺难度,有利于U型线成型。The aspect ratio of the rectangular conductors in the independent conductor layer group 5 does not exceed 3. While ensuring that the rectangular conductor in the independent conductor layer group 5 produces less loss, it reduces the difficulty of the end twisting process of the rectangular conductor, which is beneficial to the U-shaped wire forming.
进一步的,所述定子绕组2包括一个或多个独立支路。在同一独立支路中,位于不同层组内的矩形导体之间,均为串联关系。Further, the stator winding 2 includes one or more independent branches. In the same independent branch, the rectangular conductors located in different layer groups are all connected in series.
示例性的,如图8所示,每个定子槽3内,沿定子铁芯1径向设置有五层导体层组。沿定子铁芯外壁向中心方向,依次命名为第一层、第二层、第三层、第四层和第五层导体层组。Exemplarily, as shown in FIG. 8 , in each stator slot 3 , five layers of conductor layer groups are arranged radially along the stator core 1 . Along the direction from the outer wall of the stator core to the center, they are successively named as the first layer, the second layer, the third layer, the fourth layer and the fifth layer conductor layer group.
其中,第一层、第二层、第三层和第四层导体层组均为组合导体层组4,各组合导体层组4中均设置有两根矩形导体,两个矩形导体沿定子铁芯1圆周向排布,且各矩形导体的长宽比均小于2.5。Among them, the conductor layer groups of the first layer, the second layer, the third layer and the fourth layer are combined conductor layer groups 4, and each combined conductor layer group 4 is provided with two rectangular conductors, and the two rectangular conductors are arranged along the stator iron layer. The cores 1 are arranged in the circumferential direction, and the aspect ratio of each rectangular conductor is less than 2.5.
第五层导体层组为最靠近定子铁芯1中心的一层导体层组,为独立导体层组5,第五层导体层组由一根矩形导体构成,该矩形导体的长宽比小于3。The fifth conductor layer group is the conductor layer group closest to the center of the stator core 1, which is an independent conductor layer group 5, and the fifth conductor layer group is composed of a rectangular conductor whose aspect ratio is less than 3 .
如图8-13所示,采用组合导体层组4和独立导体层组5混合布置的方式,在保证定子绕组2中的矩形导体产生较小的损耗的同时,降低了矩形导体的端部扭头工艺难度。并且该定子组件采用混合导体布置的方式,进一步提高了槽满率,使槽满率达到72.6%(纯铜)。As shown in Figure 8-13, the combined arrangement of the combined conductor layer group 4 and the independent conductor layer group 5 is used to reduce the end twist of the rectangular conductor while ensuring that the rectangular conductor in the stator winding 2 produces less loss. Craft difficulty. Moreover, the stator assembly adopts the arrangement of mixed conductors, which further improves the slot fullness rate, making the slot fullness rate reach 72.6% (pure copper).
需要说明的是,在实际设计生产过程中,受电机结构、尺寸影响,为保证定子组件产生的损耗保持在较低水平,除最靠近定子铁芯中心的一层导体层组外,靠近定子铁芯中心多层导体层组,也可设置为独立导体层组,如图9和图10所示,此处不作赘述。另外,在实际设计生产过程中,可限制各矩形导体长宽比,根据固定的长宽比调整各组合导体层组包含的矩形导体数量。It should be noted that, in the actual design and production process, due to the influence of the structure and size of the motor, in order to ensure that the loss generated by the stator assembly is kept at a low level, except for the first layer of conductor layer group closest to the center of the stator core, the The multi-layer conductor layer group in the center of the core can also be set as an independent conductor layer group, as shown in Fig. 9 and Fig. 10 , which will not be described in detail here. In addition, in the actual design and production process, the aspect ratio of each rectangular conductor can be limited, and the number of rectangular conductors contained in each combined conductor layer group can be adjusted according to the fixed aspect ratio.
与相关技术相比,混合导体布置的扁线电机,在保证定子槽内的导体总的截面积相近的情况下,减小各矩形导体的长宽比,有利于U型线成型,工艺性更好;同时调整定子槽内各矩形导体的长和宽、调整定子槽型、利用定子齿部,调整定子槽沿径向的距离、调整定子内径、调整定子轭部,使定子组件各部位的磁密分布合理,提高了槽满率,提高了电机的工作效率。Compared with the related technology, the flat-wire motor with mixed conductor arrangement reduces the aspect ratio of each rectangular conductor while ensuring that the total cross-sectional area of the conductors in the stator slot is similar, which is beneficial to the U-shaped wire forming and has better manufacturability Good; at the same time, adjust the length and width of each rectangular conductor in the stator slot, adjust the stator slot shape, use the stator teeth, adjust the radial distance of the stator slot, adjust the inner diameter of the stator, and adjust the stator yoke to make the magnetic field of each part of the stator assembly The dense distribution is reasonable, which improves the slot full rate and the working efficiency of the motor.
如图3和图8所示,与相关技术相比,通过设置组合导体层组,将原 来的每个定子槽内,沿定子铁芯径向设置有9层矩形导体,优化为每个定子槽内,沿定子铁芯径向只需设置5层矩形导体即可。As shown in Figure 3 and Figure 8, compared with the related technology, by setting the combined conductor layer group, each original stator slot is provided with 9 layers of rectangular conductors along the radial direction of the stator core, which is optimized for each stator slot Inside, only 5 layers of rectangular conductors need to be set along the radial direction of the stator core.
在不等宽定子槽中,也可以组合导体层导体根数可为基数,如图11所示,沿定子铁芯1径向依次排布,依次为一层三根导体组成的组合导体层、四层两根导体组成的组合导体层、一层独立导体层。In stator slots with unequal widths, the number of conductors in the combined conductor layer can also be the base number. As shown in Figure 11, they are arranged in sequence along the radial direction of the stator core 1, followed by a combined conductor layer consisting of one layer of three conductors, four A combined conductor layer consisting of two conductors and an independent conductor layer.
本申请实施例技术方案降低了对扭头工装的要求,并且定子槽内沿定子铁芯径向的导体层数越多,本申请提出的混合导体布置的方式效果越好。大大降低了电机的生产难度或成本。The technical solution of the embodiment of the present application reduces the requirements for the twisting tool, and the more conductor layers in the stator slot along the radial direction of the stator core, the better the effect of the mixed conductor arrangement proposed by the present application. The production difficulty or cost of the motor is greatly reduced.
如图12所示,定子槽等宽设置,定子槽内设置有三层组合导体层组4和两层独立导体层组5,共容纳8根矩形导体。三层组合导体层组4内的矩形导体尺寸均相同,两层独立导体层组5内的矩形导体尺寸均相同,因此槽内绕组仅分为两种线型。对于等宽定子槽,采用本申请同槽层多线排布的方式,不仅优化了沿定子铁芯径向的导体层数,还优化了线型种类,进一步降低了生产工艺难度。As shown in FIG. 12 , the stator slots are set at equal widths, and the stator slots are provided with three combined conductor layer groups 4 and two independent conductor layer groups 5 , accommodating 8 rectangular conductors in total. The dimensions of the rectangular conductors in the three-layer composite conductor layer group 4 are all the same, and the dimensions of the rectangular conductors in the two independent conductor layer groups 5 are all the same, so the windings in the slots are only divided into two types. For stator slots of equal width, the method of multi-line arrangement in the same slot layer of the present application not only optimizes the number of conductor layers along the radial direction of the stator core, but also optimizes the types of lines, further reducing the difficulty of the production process.
申请人发现,采用传统的扁线电机采用了等槽宽的设计时,定子中导磁用的齿形状为梯形,且靠近铁芯内圆的位置齿部宽度最小,靠近外圆的位置齿的宽度最大,如此设计导致齿部磁密分布非常不均匀,靠近内圆的齿部磁密非常饱和时,靠近外圆的齿部磁密很低,空间上是一种浪费。The applicant found that when the traditional flat wire motor adopts the design of equal slot width, the shape of the teeth for magnetic conduction in the stator is trapezoidal, and the tooth width is the smallest near the inner circle of the iron core, and the tooth width is the smallest near the outer circle. The width is the largest. This design results in a very uneven magnetic density distribution on the teeth. When the magnetic density of the teeth near the inner circle is very saturated, the magnetic density of the teeth near the outer circle is very low, which is a waste of space.
定子槽采用传统每层空间一层导线同时又采用阶梯槽设计时,靠外圆的导线宽度尺寸宽度远高于靠近内圆位置的导线,同时靠近外圆位置的导线厚度明显薄于靠近内圆位置的导线。靠近外圆位置的导线宽厚比值过大,一方面槽内导线的绝缘层面积占比过大,牺牲了槽的纯铜填充率;另一方面,靠外圆的导线需要窄边折弯,折弯半径过大,当导致采用阶梯槽设计方案后绕组的端部尺寸相对平行槽明显加长。When the stator slot adopts the traditional one layer of wire per layer space and adopts the stepped slot design, the width of the wire near the outer circle is much higher than that of the wire near the inner circle, and the thickness of the wire near the outer circle is obviously thinner than that near the inner circle. location of the wire. The width-to-thickness ratio of the wire near the outer circle is too large. On the one hand, the insulating layer area of the wire in the slot is too large, sacrificing the pure copper filling rate of the slot; If the bending radius is too large, the end dimension of the winding will be significantly longer than the parallel slot when the stepped slot design is adopted.
本申请技术方案在定子槽底同层两根以上导线设计将原先需要的过扁形状(宽厚比尺寸过大的)的导线,被偏正方形导线替换,提高纯铜槽满率,还有效降低了绕组端部尺寸。当采用阶梯槽结构时,实现了槽的梯形 槽的效果,使电机导线采用方形布置同时能实现了齿部磁密的均匀分布,电机的空间利用率得到进一步大幅提高。In the technical solution of the present application, two or more conductors on the same layer at the bottom of the stator slot are designed to replace the originally required over-flat shape (too large in width-to-thickness ratio) conductors with partial square conductors to improve the fullness of the pure copper slot and effectively reduce the Winding end dimensions. When the stepped slot structure is adopted, the effect of the trapezoidal slot of the slot is realized, the motor wires are arranged in a square shape, and the uniform distribution of the magnetic density of the teeth can be realized, and the space utilization rate of the motor is further greatly improved.
在本申请另一实施例提供了一种基于双拼结构的低槽压降定子组件及电机,所述电机包括定子组件。Another embodiment of the present application provides a low-slot pressure drop stator assembly and a motor based on a double split structure, and the motor includes a stator assembly.
具体的,所述定子组件包括定子铁芯和定子绕组,所述定子铁芯上沿其圆周方向设置有若干个定子槽,所述定子绕组为三相绕组,其绕线采用矩形导线,且绕线采用叠绕组形式布置。Specifically, the stator assembly includes a stator core and a stator winding. Several stator slots are arranged on the stator core along its circumferential direction. The stator winding is a three-phase winding, and its winding adopts a rectangular wire, and the winding The wires are laid out in the form of lapped windings.
每个定子槽的槽底导线层中设置有两根矩形导线,且两根矩形导线沿定子铁芯圆周方向依次排布,即双拼结构。Two rectangular wires are arranged in the wire layer at the bottom of each stator slot, and the two rectangular wires are arranged in sequence along the circumferential direction of the stator core, that is, a double-split structure.
具体的,在同一定子组件中,各定子槽内导线的命名方向相同。其中,每个定子槽内沿定子铁芯径向依次设置有若干层导线层,所述槽底导线层是指定子槽内最靠近定子铁芯外壁的一层导线层。Specifically, in the same stator assembly, the naming directions of the wires in each stator slot are the same. Wherein, several layers of wire layers are sequentially arranged in each stator slot along the radial direction of the stator iron core, and the wire layer at the bottom of the slot is the layer of wire layers closest to the outer wall of the stator iron core in the designated sub-slot.
示例性的,如图13所示,所述定子槽内设置有5层导线层、8根导线,为方便理解,按照从槽底到槽口方向、从左到右方向,对各导线依次命名为L1、L2、L3、…、L8。其中,导线L1和导线L2设置在槽底导线层中。Exemplarily, as shown in Figure 13, there are 5 layers of wire layers and 8 wires arranged in the stator slot. For the convenience of understanding, the wires are named in sequence according to the direction from the bottom of the slot to the slot opening and from left to right. are L1, L2, L3, ..., L8. Wherein, the wire L1 and the wire L2 are arranged in the wire layer at the bottom of the slot.
进一步的,所述定子组件上设置有n对极,每个极包括六个定子槽,其中,n为大于或等于4的偶数;每相绕组包括两条支路,记为支路一和支路二;两条支路的首末端均从槽底导线层出线,且两条支路的首端位于同一极内;两条支路的绕线在定子铁芯圆周上延伸的方向相反。Further, the stator assembly is provided with n pairs of poles, and each pole includes six stator slots, wherein, n is an even number greater than or equal to 4; each phase winding includes two branches, denoted as branch one and branch Road 2: The first and last ends of the two branches come out from the conductor layer at the bottom of the slot, and the first ends of the two branches are located in the same pole; the windings of the two branches extend in opposite directions on the circumference of the stator core.
三相绕组星点线和绕组引出线均从槽底层绕组引出,给电机绕组内部连接和对外连接线均不占用轴向空间创造了条件。The three-phase winding star point line and the winding lead-out line are drawn from the bottom winding of the slot, which creates conditions for the internal connection and external connection of the motor winding without occupying axial space.
示例性的,如图14所示,为方便理解,将绕组展开图按照从左到右方向,对各极依次命名:P1、P2、P3、…、P2n。其中,一相绕组中的两条支路的首端,均位于P1极。Exemplarily, as shown in FIG. 14 , for the convenience of understanding, the winding expansion diagram is sequentially named from left to right: P1, P2, P3, . . . , P2n. Wherein, the head ends of the two branches in the one-phase winding are both located at the P1 pole.
每极包括六个定子槽,即每极每相包括两个槽。如图15所示,37号定子槽和38号定子槽属于同极同相。为方便理解,可按照从图示左侧到右侧方向,将同极同相的两个定子槽,分别命名为Q1槽位和Q2槽位。例如,37号定子槽为Q1槽位;38号定子槽为Q2槽位。在同一定子组件中,各 极槽位的命名方向相同。Each pole includes six stator slots, ie each pole includes two slots per phase. As shown in Figure 15, stator slot No. 37 and stator slot No. 38 belong to the same pole and phase. For the convenience of understanding, the two stator slots with the same pole and phase can be named Q1 slot and Q2 slot respectively according to the direction from left to right in the figure. For example, the No. 37 stator slot is the Q1 slot; the No. 38 stator slot is the Q2 slot. In the same stator assembly, the naming direction of each pole slot is the same.
进一步的,每条支路由若干个最小均衡单元串联构成,且同一相绕组中的两条支路各自串联的最小均衡单元的数量相同。Further, each branch is composed of several minimum balancing units connected in series, and the number of minimum balancing units connected in series in two branches in the same phase winding is the same.
可以理解的是:最小均衡单元是指:由不同相位即层位的绕组元件组成的子绕组结构。电机一相绕组的一个支路绕组有若干个这样的子绕组结构串联而成,且不同支路之间只要保证串联的子绕组数量相等,那么就可以保证该电机的相绕组各支路之间的绕组在相位和电感上都相同(即该电机绕组为均衡绕组)It can be understood that the smallest equalization unit refers to a sub-winding structure composed of winding elements of different phases, ie layers. A branch winding of a motor phase winding has several such sub-winding structures in series, and as long as the number of sub-windings connected in series is equal between different branches, then the phase winding of the motor can be ensured. The windings of the motor are the same in phase and inductance (that is, the motor winding is a balanced winding)
具体的,一个最小均衡单元由四个叠绕组线圈单元串联而成,其绕线跨越连续的三个极,且一个最小均衡单元的所有槽内导线按槽层位合并后,满足四个完整定子槽空间。Specifically, a minimum equalization unit is composed of four stacked winding coil units connected in series, and its winding spans three consecutive poles, and all the wires in the slots of a minimum equalization unit are combined according to the slot levels to meet the requirements of four complete stators. slot space.
示例性的,如图16所示,一个最小均衡单元中包含的四个叠绕组线圈单元分别是:26号定子槽和32号定子槽之间的绕线、31号定子槽和37号定子槽之间的绕线、32号定子槽和38号定子槽之间的绕线、37号定子槽和43号定子槽之间的绕线。并且该最小均衡单元的绕线跨越了26号定子槽到43号定子槽之间的三个极。Exemplarily, as shown in Figure 16, the four stacked winding coil units contained in a minimum equalization unit are: the winding between the No. 26 stator slot and the No. 32 stator slot, the No. 31 stator slot and the No. 37 stator slot The winding between the No. 32 stator slot and the No. 38 stator slot, the winding between the No. 37 stator slot and the No. 43 stator slot. And the winding of the smallest equalization unit spans three poles between the No. 26 stator slot and the No. 43 stator slot.
具体的,每个叠绕组线圈单元经过的槽内导线,合并后满足一个完整定子槽空间。例如,26号定子槽和32号定子槽之间的绕线,在26号定子槽中经过的槽内导线为L2、L3、L4、L7;在32号定子槽中经过的槽内导线为L1、L5、L6、L8;两个定子槽内导线按照导线编号合并后,刚好对应一个完整槽的8根导线位置。同理,其它各个叠绕组线圈单元对于对应的槽内导线,按照导线编号合并后,也刚好对应一个完整槽的8根导线位置。Specifically, the wires in the slots passed by each stacked winding coil unit are combined to satisfy a complete stator slot space. For example, for the winding between No. 26 stator slot and No. 32 stator slot, the wires in the slot passing through the No. 26 stator slot are L2, L3, L4, and L7; the wires passing through the No. 32 stator slot are L1 , L5, L6, L8; after the wires in the two stator slots are merged according to the wire numbers, it just corresponds to the position of 8 wires in a complete slot. In the same way, for the corresponding wires in the slots of the other stacked coil units, after combining them according to the numbers of the wires, they also just correspond to the positions of the 8 wires in a complete slot.
利用定子槽槽底导线层的双拼导线布局,改变了绕组的绕线方式,使同一相绕组中两条支路的绕线,沿定子铁芯圆周向,呈相反方向延伸。并且同一相绕组中的两条支路,各自串联的最小均衡单元的数量相同,使得该相绕组达到均衡电路状态。The winding mode of the winding is changed by using the double wire layout of the wire layer at the bottom of the stator slot, so that the windings of the two branches in the same phase winding extend in opposite directions along the circumference of the stator core. In addition, the two branches in the same phase winding have the same number of minimum equalization units connected in series, so that the phase winding reaches a balanced circuit state.
另外,将两条支路的绕线首端设置在同一定子槽内或同一极内,且一条支路的绕线首末端之间,跨越足够多的定子槽,实现了降低定子槽内的 所有导线之间的最高槽压降的效果。In addition, the winding heads of the two branches are set in the same stator slot or in the same pole, and the winding head and end of one branch span enough stator slots to realize the reduction of the stator slot. The effect of the highest slot pressure drop between all conductors.
需要说明的是,首端和末端为相对命名,即支路绕线一端为首端,另一端即为末端,不做具体限定。It should be noted that the head end and the end are relative names, that is, one end of the branch winding is the head end, and the other end is the end end, which is not specifically limited.
进一步的,所述最小均衡单元分为第一最小均衡单元和第二最小均衡单元;第一最小均衡单元和第二最小均衡单元的绕线,在定子铁芯圆周上延伸的方向相反。同一相绕组中的两条支路,每条支路中采用一种最小均衡单元。即同一相绕组中的两条支路(为描述方便设为支路一和支路二),支路一由若干个第一最小均衡单元串联构成,支路二则由若干个第二最小均衡单元串联构成。Further, the minimum equalization unit is divided into a first minimum balance unit and a second minimum balance unit; the windings of the first minimum balance unit and the second minimum balance unit extend in opposite directions on the circumference of the stator core. For two branches in the same phase winding, a minimum equalization unit is used in each branch. That is, two branches in the same phase winding (set as branch 1 and branch 2 for the convenience of description), branch 1 is composed of several first minimum equalization units connected in series, and branch 2 is composed of several second minimum equalization units The units are connected in series.
由于同一相绕组中的两个支路的绕线,串联的最小均衡单元数量相同,因此两条支路经过的槽位相同,互为均衡绕组。Since the windings of the two branches in the same phase winding have the same number of minimum equalization units connected in series, the slots passed by the two branches are the same, and they are mutually balanced windings.
为方便理解,将槽内导线按照PnQcLm进行定义,表示Pn极下Qc槽位中的Lm号导线。其中,n≥4,且n为偶数;c等于1或2;m≥4。For the convenience of understanding, the wire in the slot is defined as PnQcLm, which means the Lm wire in the Qc slot under the Pn pole. Wherein, n≥4, and n is an even number; c is equal to 1 or 2; m≥4.
示例性的,当m为偶数时,支路一中一个第一最小均衡单元的绕线路径为:Exemplarily, when m is an even number, the winding path of a first minimum equalization unit in branch one is:
P1Q2L2(首端)->P2Q2L1->P1Q2L3->…->P1Q2L(m-1)->P2Q2Lm->P3Q2Lm->P2Q2L(m-1)->P3Q2L(m-)…>P1Q2Lm->P2Q2L3->P3Q2L1->P2Q1L2->P3Q1L2->P4Q1L1->P3Q1L3->…->P3Q1L(m-1)->P4Q1Lm->P3Q1Lm->P2Q1L(m-1)->P3Q1L(m-2)->…->P2Q1L3->P3Q1L1->P2Q2L2(末端)->(另一第一最小均衡单元首端)。P1Q2L2 (head)->P2Q2L1->P1Q2L3->...->P1Q2L(m-1)->P2Q2Lm->P3Q2Lm->P2Q2L(m-1)->P3Q2L(m-)...>P1Q2Lm->P2Q2L3- >P3Q2L1->P2Q1L2->P3Q1L2->P4Q1L1->P3Q1L3->…->P3Q1L(m-1)->P4Q1Lm->P3Q1Lm->P2Q1L(m-1)->P3Q1L(m-2)->… -> P2Q1L3 -> P3Q1L1 -> P2Q2L2 (end) -> (another first minimum equalization unit head end).
支路二中一个第二最小均衡单元的绕线路径为:The winding path of a second minimum equalization unit in branch two is:
P1Q1L2->P2Q1L1->P1Q1L3->…->P1Q1L(m-1)->P2Q1Lm->P1Q1Lm->P(2n)Q1L(m-1)->P1Q1L(m-2)->…->P(2n)Q1L3->P1Q1L1->P(2n)Q2L2->P(2n-1)Q2L2->P(2n)Q2L1->P(2n-1)Q2L3->…P(2n-1)Q2L(m-1)->P(2n)Q2Lm->P1Q2Lm->P(2n)Q2L(m-1)->P1Q2L(m-3)->…->P(2n)Q2L3->P1Q2L1->P(2n)Q1L2->(另一第二最小均衡单元首端)。P1Q1L2->P2Q1L1->P1Q1L3->...->P1Q1L(m-1)->P2Q1Lm->P1Q1Lm->P(2n)Q1L(m-1)->P1Q1L(m-2)->...->P (2n)Q1L3->P1Q1L1->P(2n)Q2L2->P(2n-1)Q2L2->P(2n)Q2L1->P(2n-1)Q2L3->...P(2n-1)Q2L( m-1)->P(2n)Q2Lm->P1Q2Lm->P(2n)Q2L(m-1)->P1Q2L(m-3)->...->P(2n)Q2L3->P1Q2L1->P (2n) Q1L2->(another second minimum equalization unit head end).
当m为奇数时,支路一中一个第一最小均衡单元的绕线路径为:When m is an odd number, the winding path of a first minimum equalization unit in branch one is:
P1Q2L2->P2Q2L1->P1Q2L3->…->P1Q2Lm->P2Q1Lm->P3Q1L(m-1)->…->P2Q1L3->P3Q1L1->P2Q1L2->P3Q1L2->P4Q1L1->P3Q1L3->…->P3Q1Lm->P2Q2Lm->P3Q2L(m-1)->P2Q2Lm->P3Q2L(m-1)->…->P2Q2L3->P3Q2L1->P2Q2L2->(另一第一最小均衡单元首端)。P1Q2L2->P2Q2L1->P1Q2L3->…->P1Q2Lm->P2Q1Lm->P3Q1L(m-1)->…->P2Q1L3->P3Q1L1->P2Q1L2->P3Q1L2->P4Q1L1->P3Q1L3->…-> P3Q1Lm->P2Q2Lm->P3Q2L(m-1)->P2Q2Lm->P3Q2L(m-1)->...->P2Q2L3->P3Q2L1->P2Q2L2->(another first minimum equalization unit head end).
支路二中一个第二最小均衡单元的绕线路径为:The winding path of a second minimum equalization unit in branch two is:
P1Q2L1(首端)->P2Q1L1->P1Q1L3->…->P1Q1Lm->P(2n)Q2Lm->P1Q2L(m-1)->…->P(2n)Q2L3->P1Q1L2->P(2n)Q1L2->P(2n-1)Q1L2->P(2n)Q2L1->P(2n-1)Q2L3->…P(2n-1)Q2Lm->P(2n)Q1Lm->P1Q1L(m-1)->…->P(2n)Q1L3->P1Q1L1->P(2n)Q2L2(末端)->(另一第二最小均衡单元首端)。P1Q2L1 (head end)->P2Q1L1->P1Q1L3->…->P1Q1Lm->P(2n)Q2Lm->P1Q2L(m-1)->…->P(2n)Q2L3->P1Q1L2->P(2n )Q1L2->P(2n-1)Q1L2->P(2n)Q2L1->P(2n-1)Q2L3->...P(2n-1)Q2Lm->P(2n)Q1Lm->P1Q1L(m- 1)->...->P(2n)Q1L3->P1Q1L1->P(2n)Q2L2 (end)->(the head end of another second minimum equalization unit).
如图17所示,当定子组件为8极48槽,支路数为2时,同一相绕组中,支路一由两个第一最小均衡单元串联,支路二由两个第二最小均衡单元串联。这样两个支路有一半的绕组数量存在共槽情况,电机的槽压降下降一半。As shown in Figure 17, when the stator assembly has 8 poles and 48 slots, and the number of branches is 2, in the same phase winding, branch one is connected in series by two first minimum equalization units, and branch two is composed of two second minimum equalization units. Units are connected in series. In this way, half of the windings of the two branches share the same slot, and the slot voltage drop of the motor is reduced by half.
当定子组件为12极72槽时,支路数为2时,同一相绕组中,支路一由三个第一最小均衡单元串联,支路二由三个第二最小均衡单元串联。这样两个支路有一半的绕组数量存在共槽情况,电机的槽压降下降至1/3以内。以此次类推,电机的极槽数越多,槽压降下降越多。When the stator assembly has 12 poles and 72 slots, and the number of branches is 2, in the same phase winding, branch one is connected in series with three first minimum equalization units, and branch two is connected in series with three second minimum balance units. In this way, half of the windings of the two branches share the same slot, and the slot voltage drop of the motor is reduced to less than 1/3. By analogy this time, the more the number of pole slots of the motor, the greater the slot pressure drop.
当m为偶数时,并且同一相绕组中,两条支路的首端位于同一定子槽内。When m is an even number, and in the same phase winding, the head ends of the two branches are located in the same stator slot.
示例性的,支路一中一个第一最小均衡单元的绕线路径为:P1Q2L2->P2Q2L1->P1Q2L3->…->P1Q2L(m-1)->P2Q2Lm->P3Q2Lm->P2Q2L(m-1)->P3Q2L(m-2)->…>P2Q2L3->P3Q2L1->P2Q1L2->P3Q1L2->P4Q1L1->P3Q1L3->…->P3Q1Lm->P2Q1L(m-1)->P3Q1L(m-2)->P2Q1L3->P3Q1L1->P2Q2L2->(另一第一最小单元单元首端)。Exemplarily, the winding path of a first minimum equalization unit in branch one is: P1Q2L2->P2Q2L1->P1Q2L3->...->P1Q2L(m-1)->P2Q2Lm->P3Q2Lm->P2Q2L(m- 1)->P3Q2L(m-2)->…>P2Q2L3->P3Q2L1->P2Q1L2->P3Q1L2->P4Q1L1->P3Q1L3->…->P3Q1Lm->P2Q1L(m-1)->P3Q1L(m- 2)->P2Q1L3->P3Q1L1->P2Q2L2->(another first minimum unit unit head end).
支路二中一个第二最小均衡单元的绕线路径为:P1Q2L1->P2Q1L1->P1Q1L3->…->P1Q1Lm->P(2n)Q2L(m-1)->P1Q2L(m-2)->…-> P(2n)Q2L3->P1Q1L2->P(2n)Q1L2->P(2n-1)Q2L2->P(2n)Q2L1->P(2n-1)Q2L3->…P(2n-1)Q2L(m-1)->P(2n)Q2Lm->P1Q2Lm->P(2n)Q1L(m-1)->P1Q1L(m-2)->…->P(2n)Q1L3->P1Q1L1->P(2n)Q2L2->(另一第二最小均衡单元首端)。The winding path of a second smallest equalization unit in branch two is: P1Q2L1->P2Q1L1->P1Q1L3->...->P1Q1Lm->P(2n)Q2L(m-1)->P1Q2L(m-2)- >…->P(2n)Q2L3->P1Q1L2->P(2n)Q1L2->P(2n-1)Q2L2->P(2n)Q2L1->P(2n-1)Q2L3->…P(2n -1) Q2L(m-1)->P(2n)Q2Lm->P1Q2Lm->P(2n)Q1L(m-1)->P1Q1L(m-2)->...->P(2n)Q1L3- >P1Q1L1->P(2n)Q2L2->(the head end of another second minimum equalization unit).
将两条支路的首端设置在同一定子槽内,绕线延伸相反,两条支路末端位于不同极的相同槽位。The head ends of the two branches are set in the same stator slot, the windings extend oppositely, and the ends of the two branches are located in the same slot with different poles.
当定子组件为8极48槽时,支路数为2,各支路首端在相同定子槽内,且最小均衡单元串联顺序相近,各支路降低了两个叠绕组线圈单元的压降,最高槽压降可进一步降低至1/4相压降以内。When the stator assembly has 8 poles and 48 slots, the number of branches is 2, the head ends of each branch are in the same stator slot, and the sequence of the smallest equalization unit is similar in series, each branch reduces the voltage drop of two stacked coil units, The maximum tank pressure drop can be further reduced to within 1/4 phase pressure drop.
需要说明的是,同一相中两支路的最小均衡单元串联顺序相近是指,两条支路按照电路连接的先后顺序,各叠绕组线圈单元位置以及支路首末端的压降变化规律相同。It should be noted that the similar series sequence of the minimum equalization units of the two branches in the same phase means that the two branches follow the sequence of circuit connection, the positions of the coil units of each stacked winding, and the law of voltage drop change at the beginning and end of the branches are the same.
同一相绕组中,两条支路绕线有四个首末端,将距离近的两个首端或末端设置为引出线,其余两个设置为星点线。这样可以将三相绕组出线控制在一个极的范围内,减少所占用的角度空间位置。In the same phase winding, the two branch windings have four beginnings and ends, and the two beginnings or ends with the closest distance are set as lead-out lines, and the remaining two are set as star-point lines. In this way, the outgoing wires of the three-phase windings can be controlled within the range of one pole, reducing the occupied angular space.
本申请的有益效果是:The beneficial effect of this application is:
1.本申请提出的定子组件中,利用定子槽槽底层的双拼导线布局,改变了绕组的绕线方式,使同一相绕组中两条支路的绕线,沿定子铁芯圆周向,呈相反方向延伸。并且同一相绕组中的两条支路,各自串联的最小均衡单元的数量相同,使得该相绕组达到均衡电路状态。1. In the stator assembly proposed in this application, the double wire layout at the bottom of the stator slot is used to change the winding mode of the winding, so that the winding of the two branches in the same phase winding follows the circumferential direction of the stator core. extend in the opposite direction. In addition, the two branches in the same phase winding have the same number of minimum equalization units connected in series, so that the phase winding reaches a balanced circuit state.
2.将两条支路的绕线首端设置在同一定子槽内或同一极内,且一条支路的绕线首末端之间,跨越足够多的定子槽,实现了降低定子槽内的所有导线之间的最高槽压降的效果。2. Set the winding heads of the two branches in the same stator slot or in the same pole, and between the winding heads and ends of a branch, span enough stator slots to reduce the stator slot. The effect of the highest slot pressure drop between all conductors.
3.三相绕组星点线和绕组引出线均从槽底层绕组引出,给电机绕组内部连接和对外连接线均不占用轴向空间创造了条件。3. The three-phase winding star point line and the winding lead-out line are drawn from the bottom winding of the slot, which creates conditions for the internal connection and external connection lines of the motor winding to not occupy the axial space.
尽管参照前述实施例对本申请进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相 应技术方案的本质脱离本申请各实施例技术方案的精神和范围。Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: they can still modify the technical solutions described in the aforementioned embodiments, or perform equivalent replacements for some of the technical features; and these The modification or replacement does not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.
Claims (14)
- 一种定子组件,所述定子组件包括定子铁芯和定子绕组;所述定子铁芯大致上呈现为圆筒状;所述定子铁芯上设置有若干个定子槽,所述定子槽沿所述定子铁芯圆周方向依次排布,呈环形阵列状;所述定子绕组的绕线采用矩形导体,其中,A stator assembly, the stator assembly includes a stator core and a stator winding; the stator core is substantially cylindrical; a number of stator slots are arranged on the stator core, and the stator slots are arranged along the The circumferential direction of the stator cores is arranged sequentially in a circular array; the winding of the stator winding adopts a rectangular conductor, wherein,每个所述定子槽内设置有若干层组合导体层组,同一定子槽内的各层组合导体层组沿定子铁芯径向依次排布;Each stator slot is provided with several layers of combined conductor layer groups, and each layer of combined conductor layer groups in the same stator slot is arranged in sequence along the radial direction of the stator core;每层所述组合导体层组中包含有两根或两根以上的矩形导体,且各组矩形导体沿定子铁芯圆周向依次排布。Each group of combined conductor layers includes two or more rectangular conductors, and each group of rectangular conductors is arranged in sequence along the circumferential direction of the stator core.
- 根据权利要求1所述的一种定子组件,其中,所述组合导体层组内的矩形导体的长宽比不超过2.5。A stator assembly according to claim 1, wherein the aspect ratio of the rectangular conductors in the composite conductor layer group is not more than 2.5.
- 根据权利要求1所述的一种定子组件,其中,所述定子槽内设有偶数层组合导体层,或者,所述定子槽内设有奇数层组合导体层。The stator assembly according to claim 1, wherein the stator slots are provided with even-numbered composite conductor layers, or the stator slots are provided with odd-numbered composite conductor layers.
- 根据权利要求1所述的一种定子组件,其中,每个所述定子槽内还设置有一层或多层独立导体层,所述各独立导体层组中只包含一根矩形导体;A stator assembly according to claim 1, wherein one or more independent conductor layers are further arranged in each of the stator slots, and each independent conductor layer group contains only one rectangular conductor;同一定子槽内的组合导体层组和独立导体层组,沿定子铁芯径向依次排布;所述独立导体层组靠近定子铁芯中心设置,所述组合导体层组靠近定子铁芯外壁设置。The combined conductor layer group and the independent conductor layer group in the same stator slot are arranged in sequence along the radial direction of the stator core; the independent conductor layer group is set close to the center of the stator core, and the combined conductor layer group is close to the outer wall of the stator core set up.
- 根据权利要求4所述的一种定子组件,其中,所述独立导体层组内的矩形导体的长宽比不超过3。A stator assembly according to claim 4, wherein the aspect ratio of the rectangular conductors in the independent conductor layer group does not exceed 3.
- 根据权利要求1所述的一种定子组件,其中,所述定子绕组包括一个或多个独立支路;在同一独立支路中,位于不同导体层组内的矩形导体之间,为串联关系。A stator assembly according to claim 1, wherein the stator winding includes one or more independent branches; in the same independent branch, rectangular conductors located in different conductor layer groups are connected in series.
- 根据所述权利要求4-6任一项所述定子组件,其中,所述组合导体层组包含偶数根矩形导体,所述独立导体层为偶数层。The stator assembly according to any one of claims 4-6, wherein the group of combined conductor layers comprises an even number of rectangular conductors, and the independent conductor layers are even layers.
- 根据权利要求4-7所述定子组件,其中,所述靠近定子铁芯外壁设置的组合导体层组包括两根矩形导线,所述定子组件上设置有n对极,每 极包括六个定子槽,其中,n为大于或等于4的偶数;The stator assembly according to claim 4-7, wherein the combined conductor layer set close to the outer wall of the stator core includes two rectangular wires, and n pairs of poles are arranged on the stator assembly, and each pole includes six stator slots , wherein, n is an even number greater than or equal to 4;所述定子绕组的每相绕组包括两条支路,两条支路的首末端均从槽底导线层出线,且两条支路的首端位于同一极内;两条支路的绕线在定子铁芯圆周上延伸的方向相反。Each phase winding of the stator winding includes two branch circuits, the first and the end of the two branch circuits come out from the wire layer at the bottom of the slot, and the first ends of the two branch circuits are located in the same pole; the windings of the two branch circuits are in the The directions extending on the circumference of the stator core are opposite.
- 根据权利要求8所述的定子组件,其中,每条所述支路由若干个最小均衡单元串联构成,且同一相绕组中的两条支路各自串联的最小均衡单元的数量相同。The stator assembly according to claim 8, wherein each branch is composed of several minimum equalization units in series, and the number of minimum equalization units connected in series in two branches in the same phase winding is the same.
- 根据权利要求9所述的定子组件,其中,一个所述最小均衡单元由四个叠绕组线圈单元串联而成,其绕线跨越连续的三个极,且一个最小均衡单元的所有槽内导线按槽层位合并后,满足四个完整定子槽空间。The stator assembly according to claim 9, wherein one minimum equalization unit is composed of four stacked winding coil units in series, and its winding wire spans three consecutive poles, and all the wires in the slots of one minimum equalization unit are arranged according to After the slot levels are merged, four complete stator slot spaces are satisfied.
- 根据权利要求9所述的定子组件,其中,所述最小均衡单元包括第一最小均衡单元和第二最小均衡单元;第一最小均衡单元和第二最小均衡单元的绕线,在定子铁芯圆周上延伸的方向相反;The stator assembly according to claim 9, wherein the minimum equalization unit comprises a first minimum equalization unit and a second minimum equalization unit; the windings of the first minimum equalization unit and the second minimum equalization unit have The direction of upward extension is opposite;同一相绕组中的两条支路,每条支路中采用一种最小均衡单元。For two branches in the same phase winding, a minimum equalization unit is used in each branch.
- 根据权利要求8-11中任一所述的定子组件,其中,同一相所述绕组中的两条支路的首端位于同一定子槽内。The stator assembly according to any one of claims 8-11, wherein the head ends of the two branches in the winding of the same phase are located in the same stator slot.
- 根据权利要求8-11中任一所述的定子组件,其中,同一相所述绕组中,两条支路绕线有四个首末端,将距离近的两个首端或末端设置为引出线,其余两个设置为星点线。The stator assembly according to any one of claims 8-11, wherein, in the windings of the same phase, the two branch windings have four starting ends, and the two starting ends or ends that are closest to each other are set as lead-out wires , and the remaining two are set as star-dotted lines.
- 一种同槽层多线的扁线电机,其中,包括转子组件和权利要求1-13中任一所述定子组件,所述转子组件位于所述定子组件内侧。A flat wire motor with multiple wires in the same slot layer, which includes a rotor assembly and a stator assembly according to any one of claims 1-13, and the rotor assembly is located inside the stator assembly.
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CN202111554823.5 | 2021-12-17 | ||
CN202111554823.5A CN114243961A (en) | 2021-12-17 | 2021-12-17 | Stator assembly with same groove layer and multiple lines and flat wire motor |
CN202210668985.X | 2022-06-14 | ||
CN202210668985.XA CN114977593A (en) | 2022-06-14 | 2022-06-14 | Low groove pressure drop stator module and motor based on double pin structure |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117595549A (en) * | 2023-11-23 | 2024-02-23 | 哈尔滨理工大学 | Flat wire multi-strand connection continuous wave winding structure |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE316944C (en) * | 1917-05-17 | 1919-12-08 | ||
CH218737A (en) * | 1939-12-04 | 1941-12-31 | Oerlikon Maschf | Armature winding of collector machines with rod-shaped conductors arranged in two layers. |
CN110556938A (en) * | 2018-05-31 | 2019-12-10 | 比亚迪股份有限公司 | Stator assembly and motor |
CN114243961A (en) * | 2021-12-17 | 2022-03-25 | 上海易唯科电机技术有限公司 | Stator assembly with same groove layer and multiple lines and flat wire motor |
CN114977593A (en) * | 2022-06-14 | 2022-08-30 | 上海易唯科电机技术有限公司 | Low groove pressure drop stator module and motor based on double pin structure |
-
2022
- 2022-12-15 WO PCT/CN2022/139200 patent/WO2023109885A1/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE316944C (en) * | 1917-05-17 | 1919-12-08 | ||
CH218737A (en) * | 1939-12-04 | 1941-12-31 | Oerlikon Maschf | Armature winding of collector machines with rod-shaped conductors arranged in two layers. |
CN110556938A (en) * | 2018-05-31 | 2019-12-10 | 比亚迪股份有限公司 | Stator assembly and motor |
CN114243961A (en) * | 2021-12-17 | 2022-03-25 | 上海易唯科电机技术有限公司 | Stator assembly with same groove layer and multiple lines and flat wire motor |
CN114977593A (en) * | 2022-06-14 | 2022-08-30 | 上海易唯科电机技术有限公司 | Low groove pressure drop stator module and motor based on double pin structure |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117595549A (en) * | 2023-11-23 | 2024-02-23 | 哈尔滨理工大学 | Flat wire multi-strand connection continuous wave winding structure |
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