CN111900816A - Scattered wire winding motor - Google Patents
Scattered wire winding motor Download PDFInfo
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- CN111900816A CN111900816A CN202010828054.2A CN202010828054A CN111900816A CN 111900816 A CN111900816 A CN 111900816A CN 202010828054 A CN202010828054 A CN 202010828054A CN 111900816 A CN111900816 A CN 111900816A
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- 238000004804 winding Methods 0.000 title claims abstract description 53
- 239000004020 conductor Substances 0.000 claims abstract description 88
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052802 copper Inorganic materials 0.000 claims abstract description 34
- 239000010949 copper Substances 0.000 claims abstract description 34
- 230000017105 transposition Effects 0.000 claims abstract description 18
- 238000003466 welding Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 4
- 238000010146 3D printing Methods 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000013517 stratification Methods 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 abstract description 16
- 230000004907 flux Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 229920001651 Cyanoacrylate Polymers 0.000 description 1
- 239000004830 Super Glue Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
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- 230000004048 modification Effects 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
- 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
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/01—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields, i.e. structural association with shields
-
- 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
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
-
- 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
- H02K3/487—Slot-closing devices
-
- 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
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/03—Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Windings For Motors And Generators (AREA)
Abstract
The invention discloses a scattered wire winding motor, which belongs to the technical field of motors, wherein when two stator coils are connected in series, transposition is carried out according to the inductance of parallel winding conductors, so that the difference of the inductance among M series conductors obtained by series connection is minimum; a wiring board is also fixed at one end where the outgoing line terminal is positioned, and the wiring board is positioned between the stator and the end cover and is tightly contacted with the end part of the stator coil; the wiring board comprises a fixing ring and a plurality of wiring boxes arranged on the outer surface of the fixing ring along the circumferential direction, wiring grooves with circumferential openings are formed in the wiring boxes, and wiring copper bars are arranged in the wiring grooves; the wiring copper bars are arranged in a step shape along the axial direction; the circumferential outer surface of the junction box is provided with heat dissipation ribs; m parallel-wound conductors in the stator coil are arranged in an arrangement mode that the parallel-wound conductors in the stator coil are layered the least along the groove depth direction; the stator notch is provided with a larger arched slot wedge. The invention can effectively reduce the circulating current between the parallel winding conductors in the scattered wire winding motor and inhibit the AC copper consumption.
Description
Technical Field
The invention belongs to the technical field of motors, and particularly relates to a loose wire winding motor.
Background
Due to the advantages of efficiency, power density and high reliability, the permanent magnet motor is widely applied to new energy related industries, and promotes the development of a new round of electrification process. The loose wire winding motor is characterized in that one or more parallel winding wires are embedded in a stator slot of a permanent magnet motor along the radial direction and surround stator teeth to form a multi-turn structure to serve as a motor coil as a medium for carrying out energy exchange with a rotor magnetic field.
The traditional offline process applied to the scattered wire winding motor has strong randomness, and the shaping and layout of conductor arrangement are neglected, so that the position of parallel winding wires of the scattered wire winding motor has uncertainty, the copper consumption has excessive risk, and the overall thermal safety of the motor is seriously examined. The alternating current copper consumption in the motor can be improved through transposition when the coils are connected in series, the transposition mode is mostly adopted in a high-power flat wire motor, the shape of the coil is fixed when the coil is fed due to the fact that the flat wire motor is generally a formed winding, and the end portion is twisted by 180 degrees during manufacturing, so that transposition is achieved.
However, because the wires of the loose wire motor are disordered during the off-line process, and the effect is difficult to ensure to be obvious by adopting a method of twisting the end part by 180 degrees, the transposition mode applied to the high-power flat wire motor is rarely applied to the loose wire motor, and the effect of inhibiting the alternating current copper consumption cannot be achieved well when the transposition mode is applied to the loose wire motor.
Disclosure of Invention
In view of the drawbacks and needs in the art, the present invention provides a random winding motor, which is capable of effectively suppressing ac copper loss in the random winding motor.
In order to achieve the purpose, the invention provides a scattered wire winding motor which sequentially comprises a stator, rotor magnetic steel and a rotor iron core from outside to inside along the radial direction, wherein stator coils are placed in stator slots formed between stator teeth, each stator coil is formed by winding M parallel wound conductors, M is a positive integer, and two end covers are respectively arranged at two axial ends of the stator;
when the two stator coils are connected in series, transposition is carried out according to the inductance of the parallel winding conductor, so that the difference of the inductance among M series conductors obtained by series connection is minimum;
wherein, a series conductor is formed by two parallel winding conductors respectively taken from two stator coils and connected in series.
The inductance of the series conductor is the sum of the inductances of two parallel-wound conductors; in the invention, when the stators are connected in series, transposition is carried out based on the parallel wound conductors, so that the inductance difference between the series conductors formed by the series connection is minimum, and by adopting the transposition mode, the parallel wound conductor with larger inductance in one coil is connected in series with the parallel wound conductor with smaller inductance in the other coil, and finally the inductance of each series conductor is balanced as much as possible, thereby effectively reducing the circulating current and inhibiting the alternating current copper consumption.
Furthermore, a wiring board is fixed at one end where the outlet terminal of the stator coil is positioned, and the wiring board is positioned between the stator and the end cover and is tightly contacted with the end part of the stator coil;
the wiring board comprises a fixing ring and a plurality of wiring boxes arranged on the outer surface of the fixing ring along the circumferential direction, a wiring groove with an opening in the circumferential direction is formed in each wiring box, and a wiring copper bar is arranged in each wiring groove.
The wiring board is arranged at one end of the stator and is tightly connected with the end part of the stator coil, so that the coils can be conveniently connected in series, and the wiring board can serve as a good heat dissipation medium at the end part of the stator coil, thereby increasing the heat dissipation contact area.
Further, the wiring copper bars in the wiring grooves are arranged in a step shape along the axial direction, so that a larger moving space can be provided for the welding part.
Further, when the parallel winding conductors are connected in series, the parallel winding conductors connected in series are pressed on the corresponding wiring copper bars in a voltage welding mode; compared with spot welding, the parallel-wound conductor is pressed on the corresponding wiring copper bar in a voltage welding mode, so that the welding point of the parallel-wound conductor and the copper bar is firmer and firmer, and the safety and the reliability of the motor are improved.
Further, the circumferential outer surface of the junction box is provided with heat dissipation ribs, so that the heat dissipation effect of the wiring board can be enhanced.
Further, the wiring board is made in a 3D printing mode, so that the whole structure is compact, safe and reliable.
Further, a pressure ring is arranged between the wiring board and the end cover; the press ring is used for pressing the wiring board to prevent the wiring board from moving radially.
Furthermore, M parallel-wound conductors in the stator coil are arranged in an arrangement mode that the parallel-wound conductors in the stator coil are layered the least along the depth direction of the slot; by adopting the arrangement mode for coil inserting, the parallel winding conductors in the coil can form a cluster arrangement structure, the difference of interlinkage magnetic chains of each parallel winding conductor can be effectively reduced, and the alternating current copper consumption is effectively reduced.
Furthermore, a slot wedge inserted into the stator slot along the axial direction is arranged at the slot of the stator, and the radial height of the slot wedge is larger than a preset threshold value.
According to the invention, the slot wedge with a larger radial height (larger than a preset threshold value) is arranged at the slot of the stator, so that the whole coil is further extruded to the bottom of the stator slot by the slot wedge, and thus the slot is far away from a high-flux leakage area of the slot, and the parallel-wound conductors of the slot of the stator are arranged along the circumferential direction of the arc, thus the flux linkage difference of the cross-linkage of the parallel-wound conductors is further reduced, the circulating current loss between the parallel-wound conductors is reduced, and the alternating current copper consumption is reduced; meanwhile, because the stator coil is in close contact with the slot wedge, the heat dissipation area of the stator coil can be increased, and the heat dissipation effect of the stator coil is enhanced.
Further, the slot wedge is an arched slot wedge.
Because the leakage flux is mainly distributed at the notch and the magnetic force lines of the notch are generally distributed in an arch shape, the invention adds the arch-shaped slot wedge at the notch at the bottom of the stator slot, can effectively reduce the circulating current loss between the parallel winding conductors caused by the leakage flux of the notch, and further reduces the alternating current copper consumption.
Generally, by the above technical solution conceived by the present invention, the following beneficial effects can be obtained:
(1) in the invention, when the stators are connected in series, transposition is carried out based on the parallel wound conductors, so that the inductance difference between the series conductors formed in series is minimum, the circulating current can be effectively reduced, and the alternating current copper consumption is inhibited.
(2) The wiring board is arranged at one end of the stator and is tightly connected with the end part of the stator coil, so that the coils can be conveniently connected in series, and the wiring board can serve as a good heat dissipation medium at the end part of the stator coil, thereby increasing the heat dissipation contact area.
(3) In the scattered wire winding motor provided by the invention, the M parallel-wound conductors in the stator coil are arranged in an arrangement mode that the parallel-wound conductors in the stator coil are layered least along the depth direction of the slot, so that the difference of interlinkage magnetic chains of each parallel-wound conductor can be effectively reduced, and the alternating current copper consumption is effectively reduced.
(4) The stator slot opening is provided with the larger slot wedge, so that the whole coil can be extruded to the bottom of the stator slot by the slot wedge, the high magnetic flux leakage area of the slot opening is far away, and the parallel wound conductors of the stator slot opening are arranged along the circumferential direction of the circular arc, so that the flux linkage difference of the parallel wound conductors is further reduced, the circulation loss between the parallel wound conductors is reduced, and the alternating current copper loss is reduced; meanwhile, because the stator coil is in close contact with the slot wedge, the heat dissipation area of the stator coil can be increased, and the heat dissipation effect of the stator coil is enhanced.
(5) According to the scattered wire winding motor provided by the invention, in the preferable scheme, the slot wedge is an arc-shaped slot wedge, so that the circulating current loss between the parallel winding conductors caused by notch magnetic leakage can be effectively reduced, and the alternating current copper loss is further reduced.
Drawings
Fig. 1 is a three-dimensional exploded view of a motor structure with a scattered wire winding according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a wiring board structure according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a junction box provided by an embodiment of the present invention;
FIG. 4 is a schematic view of a welding method according to an embodiment of the present invention;
FIG. 5 is a diagram of a wiring board mounting and fixing structure according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a patch panel mounting fixture provided in accordance with an embodiment of the present invention;
FIG. 7 is a schematic diagram of a parallel-wound conductor arrangement according to an embodiment of the present invention;
fig. 8 is a front view of a stator coil provided in an embodiment of the present invention;
FIG. 9 is a schematic view of a slot wedge provided in accordance with an embodiment of the present invention;
the same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
the motor comprises a stator, a stator core 11, a stator coil 12, a slot wedge 14, rotor magnetic steel 2, a rotor core 3, a casing 4, a front end cover 5, a rear end cover 6, a bearing 7, a wiring board 8, a fixing ring 81, a junction box 82, a wiring copper bar 83, a heat dissipation rib 84 and a pressure ring 9, wherein the stator is arranged at 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the present application, the terms "first," "second," and the like (if any) in the description and the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Before explaining the technical scheme of the invention in detail, a conventional 12-slot 10-pole six-phase surface-mounted type loose-wire winding motor is taken as an example, and the basic structure of the conventional loose-wire winding motor is briefly described as follows:
as shown in fig. 1, the wire-wound motor sequentially comprises a stator 1, rotor magnetic steel 2 and a rotor core 3 from outside to inside along the radial direction, wherein the rotor magnetic steel 2 is uniformly attached to the surface of the rotor core 3 along the circumferential direction; stator teeth which are distributed along the circumferential direction are arranged on the upper edge of the stator iron core 11, stator slots are formed between adjacent stator teeth, the stator coil 12 is placed in the stator slots formed between the stator teeth, each stator coil is formed by winding one or more parallel-wound conductors, the number of the parallel-wound conductors in the stator coil is recorded as M, and M is a positive integer; the stator 1 is also provided with a casing 4, two axial ends of the stator 1 are respectively provided with two end covers, namely a front end cover 5 and a rear end cover 6, and the end covers are also provided with bearings 7. In the stator slot of the traditional scattered wire winding motor, the parallel winding conductors forming the stator coil are arranged in a disordered way, the positions of the parallel winding conductors have uncertainty, and the risk of excessive copper consumption exists.
The following are examples:
a motor with scattered wire windings is disclosed, as shown in figure 1, wherein when two stator coils are connected in series, the transposition is carried out according to the inductance of the parallel winding conductor, so that the difference of the inductance among M series conductors obtained by series connection is minimum;
wherein, a series conductor is formed by two parallel winding conductors respectively taken from two stator coils in series;
the inductance of the series conductor is the sum of the inductances of two parallel-wound conductors; in the invention, when the stators are connected in series, transposition is carried out based on the parallel wound conductors, so that the inductance difference between the series conductors formed by the series connection is minimum, and by adopting the transposition mode, the parallel wound conductor with larger inductance in one coil is connected in series with the parallel wound conductor with smaller inductance in the other coil, and finally the inductance of each series conductor is balanced as much as possible, thereby effectively reducing the circulating current and inhibiting the alternating current copper consumption;
for convenience of description, the following explains the transposition in the present embodiment by taking two stator coils a and B, which are formed by winding 4 coils around a conductor, as an example; four parallel-wound conductors in the stator coil A are sequentially denoted as A1～A4And the inductances of the parallel-wound conductors are arranged as A from large to small1-A2-A3-A4(ii) a Four parallel-wound conductors in stator coil B are denoted by B1～B4And the inductance of each parallel-wound conductor is arranged as B from large to small1-B2-B3-B4(ii) a Before transposition, the parallel wound conductors are connected in a normal mode: a. the1-B1，A2-B2，A3-B3，A4-B4(ii) a In order to minimize the difference in inductance between series conductors formed in series, the parallel-wound conductor having the larger inductance in the stator coil a is connected in series with the parallel-wound conductor having the smaller inductance in the stator coil B, and after transposition, the parallel-wound conductors are connected in the following manner: a. the1-B4，A2-B3，A3-B2，A4-B1。
In the present embodiment, the six-phase outlet terminal of the stator coil 12 is located at one end of the stator 1 close to the rear end cover 6, as shown in fig. 1, 5 and 6, a terminal plate 8 is further fixed at the end where the outlet terminal of the stator coil 12 is located, and the terminal plate 8 is located between the stator 1 and the rear end cover 6 and is in close contact with the end of the stator coil 12;
the structure of the terminal block 8 is shown in fig. 2, and includes a fixed ring 81 and a plurality of terminal blocks 82 arranged on the outer surface of the fixed ring along the circumferential direction, the number of the terminal blocks 82 is determined according to the number of stator coils to be connected in series, in this embodiment, the motor is also 12 slots and 10 poles, 6 groups are required to be connected in series, and accordingly, the number of the terminal blocks 82 is 6; a wiring groove with a circumferential opening is formed in the wiring box 82, and a wiring copper bar 83 is arranged in the wiring groove; the terminal plate 8 is closely connected with the end part of the stator coil 12, so that the coils can be conveniently connected in series, and the terminal plate 3 can serve as a good heat dissipation medium at the end part of the stator coil, so that the heat dissipation contact area is increased;
as a preferred embodiment, as shown in fig. 3, the copper bar connector 83 in the connector slot is arranged in a step shape along the axial direction, and is arranged in staggered length, thereby providing a larger moving space for the welding part.
As a preferred embodiment, when the parallel-wound conductors are connected in series, the parallel-wound conductors connected in series are pressed on the corresponding wiring copper bars in a voltage welding manner; as shown in figure 4, the voltage welding head is deeply arranged in the junction box, and the to-be-welded conductor stripped of the insulation is pressed on the wiring copper bar.
As a preferred embodiment, as shown in fig. 2, 4 and 5, a heat radiation rib 84 is provided on the circumferential outer surface of the terminal block 82, whereby the heat radiation effect of the terminal block can be enhanced.
As an alternative implementation, in the present embodiment, the wiring board is made by a 3D printing method, so that the whole structure is compact, safe and reliable.
As an alternative embodiment, as shown in fig. 1, 5 and 6, a press ring 9 is further included between the terminal plate 8 and the rear end cap 6; the compression ring is used for compressing the wiring board to prevent the wiring board from moving radially;
when the stator coil is installed, the wiring board 8 can be fixed on the stator 1 by adopting adhesives such as super glue, after the series connection work of the stator coil is finished, the wiring board 8 is compressed by the pressing ring 9 to be not easy to move in the radial direction and then is fixed on the rear end cover 6 as a whole, and the wiring board, the pressing ring and the rear end cover are fixed by a long screw to form a whole, so that the whole installation structure is compact and reliable, the axial length is not additionally increased, and the space utilization rate of the mechanical structure is high; in other embodiments of the present invention, the outlet terminal of the stator coil is located at one end of the stator 1 close to the front end cover 5, and the terminal plate 2 is correspondingly located between the stator 1 and the front end cover 5 and is in close contact with the end of the stator coil 12.
As a preferable embodiment, in the present embodiment, M parallel-wound conductors in the stator coil 12 are arranged in an arrangement that minimizes layering of the parallel-wound conductors in the stator coil in the groove depth direction;
by adopting the arrangement mode, the coil is off-line, and finally, the parallel wound conductors in the stator coil form a cluster-shaped arrangement structure; without loss of generality, in the present embodiment, the number of parallel-wound conductors in the stator coil is 4, and the arrangement is shown in fig. 7; the lower limit of the arrangement mode is adopted in the embodiment, the difference of the interlinkage flux linkage of each parallel-wound conductor can be effectively reduced, and the alternating current copper consumption is effectively reduced.
As a preferred embodiment, as shown in fig. 8, in this embodiment, a slot wedge 14 inserted into the stator slot along the axial direction is further disposed at the stator slot, and the radial height of the slot wedge 14 is greater than a preset threshold;
in the embodiment, the larger slot wedge is arranged at the slot of the stator, specifically, the radial height of the slot wedge is greater than a preset threshold value, so that the whole coil is extruded to the bottom of the stator slot by the slot wedge, and is far away from a high-flux leakage area of the slot, and the parallel-wound conductors of the slot of the stator are arranged along the circumferential direction of the arc, so that the flux linkage difference of the parallel-wound conductors is further reduced, the circulation loss between the parallel-wound conductors is reduced, and the alternating current copper loss is reduced; meanwhile, the stator coil is in close contact with the slot wedge, so that the heat dissipation area of the stator coil can be increased, and the heat dissipation effect on the stator coil is enhanced; the threshold value of the radial height of the slot wedge can be set according to the actual size of the motor and the distribution of the slot leakage area correspondingly, so that after the slot wedge is inserted, the coil is far away from the slot leakage area.
In a preferred embodiment, the slot wedge 14 is an arcuate slot wedge, as shown in fig. 9.
As the leakage flux is mainly distributed at the notch and the magnetic force lines of the notch are generally distributed in an arch shape, the arch-shaped slot wedge is additionally arranged at the notch at the bottom of the stator slot, so that the circulating current loss between the parallel winding conductors caused by the leakage flux of the notch can be effectively reduced, and the alternating current copper loss is further reduced.
In general, the scattered wire winding motor provided by the invention adopts a special transposition mode and a wire inserting process, carries out optimization design on the motor structure, has a good alternating current copper consumption inhibition effect, does not change the corresponding electromagnetic environment of the motor, and fully utilizes the internal space of the motor.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A motor with a scattered wire winding sequentially comprises a stator, rotor magnetic steel and a rotor iron core from outside to inside along the radial direction, wherein stator coils are placed in stator slots formed between stator teeth, each stator coil is formed by winding M parallel wound conductors, M is a positive integer, and two end covers are respectively arranged at two axial ends of the stator;
when two stator coils are connected in series, transposition is carried out according to the inductance of the parallel winding conductor, so that the difference of the inductance among M series conductors obtained by series connection is minimum;
wherein, a series conductor is formed by two parallel winding conductors respectively taken from two stator coils and connected in series.
2. The loose-wire winding motor of claim 1, wherein a terminal plate is further fixed to an end of the stator coil where the outlet terminal is located, the terminal plate being located between the stator and the end cover and being in close contact with the end of the stator coil;
the wiring board comprises a fixing ring and a plurality of wiring boxes arranged on the outer surface of the fixing ring along the circumferential direction, a wiring groove with an opening in the circumferential direction is formed in each wiring box, and a wiring copper bar is arranged in each wiring groove.
3. The random winding motor of claim 2, wherein the copper bar conductors in said conductor slots are arranged in a step-like manner in the axial direction.
4. The electrical machine with discrete wire windings as claimed in claim 2 wherein when the parallel wound conductors are connected in series, the parallel wound conductors connected in series are pressed onto the corresponding connecting copper bars by means of voltage welding.
5. The random winding motor of claim 2, wherein the junction box is provided with heat dissipating ribs on a circumferential outer surface thereof.
6. The random winding motor of claim 2, wherein the terminal plate is formed by 3D printing.
7. The random winding motor of claim 2, further comprising a compression ring between the terminal plate and the end cap; the clamping ring is used for pressing the wiring board to prevent the wiring board from moving radially.
8. The random-winding motor of any one of claims 1 to 7, wherein the M parallel-wound conductors in the stator coil are arranged in an arrangement that minimizes stratification of the parallel-wound conductors in the stator coil in a direction of a slot depth.
9. The random winding machine of any of claims 1-7, wherein the stator slot is provided with a slot wedge axially inserted into the stator slot, the radial height of the slot wedge being greater than a predetermined threshold.
10. The random winding machine of claim 9 wherein the slot wedges are arcuate shaped slot wedges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010828054.2A CN111900816B (en) | 2020-08-17 | 2020-08-17 | Scattered wire winding motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010828054.2A CN111900816B (en) | 2020-08-17 | 2020-08-17 | Scattered wire winding motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111900816A true CN111900816A (en) | 2020-11-06 |
| CN111900816B CN111900816B (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010828054.2A Active CN111900816B (en) | 2020-08-17 | 2020-08-17 | Scattered wire winding motor |
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| CN101213722A (en) * | 2005-07-01 | 2008-07-02 | 西门子公司 | Slot seal |
| CN102210083A (en) * | 2008-12-26 | 2011-10-05 | 株式会社小松制作所 | Armature and electric motor having the armature |
| CN206834939U (en) * | 2017-05-31 | 2018-01-02 | 长城汽车股份有限公司 | Motor winding wire deriving structure and motor |
| CN110809849A (en) * | 2017-07-27 | 2020-02-18 | 博泽沃尔兹堡汽车零部件有限公司 | Method for mounting a connection unit on a component of an electric motor |
-
2020
- 2020-08-17 CN CN202010828054.2A patent/CN111900816B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050253466A1 (en) * | 2004-05-14 | 2005-11-17 | Denso Corporation. | Stator coil including sequentially connected segment conductors preferably applicable to an electric rotary machine |
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