CN110707851A - Winding slot internal structure of flat wire motor - Google Patents
Winding slot internal structure of flat wire motor Download PDFInfo
- Publication number
- CN110707851A CN110707851A CN201911131639.2A CN201911131639A CN110707851A CN 110707851 A CN110707851 A CN 110707851A CN 201911131639 A CN201911131639 A CN 201911131639A CN 110707851 A CN110707851 A CN 110707851A
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- China
- Prior art keywords
- motor
- conductor
- axis
- conductors
- winding slot
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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
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Windings For Motors And Generators (AREA)
Abstract
The patent provides a flat wire motor winding slot inner structure with small iron core thickness and large motor power density. A plurality of conductors are arranged in the wire groove along the radial direction of the motor; the wire groove is in a trapezoid shape with the narrow lower end close to the axis of the motor and the wide upper end far away from the axis of the motor, and the width of the conductor far away from the axis of the motor is larger than that of the conductor close to the axis of the motor; the opposite side surface of the conductor is parallel to the side surface of the wire groove; the cross-sectional area of each conductor is equal.
Description
Technical Field
The patent relates to a flat wire motor winding, in particular to a structure of a winding in a wire slot.
Background
With the development of power motors, the development trend of using flat section conductors for power motors is. The flat wire motor winding is formed by connecting flat conductors (flat copper wires) penetrating through wire slots on an iron core at the end parts extending out of the wire slots. Because the motor winding is generally made of flat copper wires with equal width, the wire slots on the iron core are mainly rectangular, so that the distances among the wire slots at different positions of the motor axis are different, and the distance among the wire slots at a position far away from the motor axis is larger, thereby causing the waste of the motor space and leading the volume and the weight of the motor to be larger.
Disclosure of Invention
The patent aims to provide a structure in a winding slot of a flat wire motor with small iron core thickness and large motor power density.
The winding slot inner structure of the flat wire motor is provided with a plurality of conductors in a slot along the radial direction of the motor; the wire groove is in a trapezoid shape with the narrow lower end close to the axis of the motor and the wide upper end far away from the axis of the motor, and the width of the conductor far away from the axis of the motor is larger than that of the conductor close to the axis of the motor; the opposite side surface of the conductor is parallel to the side surface of the wire groove; the cross-sectional area of each conductor is equal.
As a further improvement to the above-mentioned structure in the winding slot of the flat-wire motor, at least one conductor near the air gap is composed of more than two sub-conductors arranged in the radial direction of the motor, and at least one conductor far from the air gap is an integral layer in the radial direction of the motor.
As a further improvement to the above-described structure of the flat wire motor winding slot, at least one of the sub-conductors is composed of two or more grandchild conductors arranged in the circumferential direction of the motor.
As a further improvement to the above-described structure in the winding slot of a flat wire motor, at least one integral layer is composed of more than two sub-conductors arranged in the circumferential direction of the motor.
The beneficial effect of this patent:
this patent is designed into trapezoidal wire casing with conventional rectangle wire casing on the iron core, and corresponding conductor cross sectional shape also is similar to trapezoidally, and the side that each conductor and wire casing side are relative is parallel with the wire casing side, but has different thickness, and the conductor width of keeping away from the motor axis is big but thickness is little, and the conductor width of keeping away from the motor axis is little but thickness is big, and the sectional area of each conductor equals, constitutes the inslot structure of winding from this. Therefore, the internal space of the motor can be utilized to the maximum extent, and the length of the radial wire slot of the motor is shorter on the premise of using the same copper, so that the thickness of the iron core in the radial direction of the motor is smaller, and the power density of the motor is larger than that of a rectangular slot motor.
The conductors have the same cross-sectional area in order to ensure that the resistance of the conductors forming the winding is substantially the same.
It has been found that the skin effect is most pronounced for the conductors in the slots, the closer the conductors are to the air gap between the rotor and the stator of the machine, and the weaker the skin effect is for the conductors further away from the air gap. Therefore, the conductor (composite layer conductor) close to the air gap in the wire slot is formed by more than two layers of sub-conductors with smaller thickness, the skin effect of the thinner sub-conductors is weak, the phenomenon of copper consumption increase caused by the skin effect can be greatly reduced, and the high-efficiency working rotating speed of the motor can be greatly improved; this patent adopts the whole (whole layer conductor) of one deck that thickness is thicker to the conductor that is farther apart from the air gap, has improved the full rate in groove, effectively improves motor efficiency.
This patent is only to the conductor structure in the wire casing injectd, as to how to connect between the conductor tip that stretches out the wire casing belongs to prior art, for example, connect in parallel, establish ties, connect in parallel after establishing ties earlier, connect in series after establishing ties earlier etc. between the tip of each sub-conductor of constitution a conductor.
The overall layer conductor in the slot or the composite layer conductor composed of the sub-conductors may be composed of one or more conductors in the width direction (for example, one sub-conductor is composed of more than two sub-conductors, and the overall layer is composed of more than two sub-conductors), or a mixture of the two.
The whole layer conductor, the branch conductor, the sub-conductor and the sub-conductor can be equal in width or unequal in width.
Drawings
Fig. 1 is a schematic view of the structure in a winding slot of a flat wire motor of embodiment 1;
fig. 2 is a schematic diagram of the structure inside the winding slot of the flat wire motor of embodiment 2.
Detailed Description
Example 1:
referring to the structure in the winding slot of the flat-wire motor shown in fig. 1, the trapezoidal wire slot 1 on the iron core is narrow at the lower end close to the axis of the motor and wide at the upper end far away from the axis of the motor. Within the slot 1, along the radial direction of the machine, there are 6 conductors, of which the conductor 3 is closest to the machine axis and closest to the air gap 2, and the other five conductors are all conductors 4.
Along the radial direction of keeping away from the motor axis of motor, the width of 6 conductors in wire casing 1 is crescent, and thickness reduces gradually. The conductor 3 has the smallest width and the largest thickness. The cross-sectional area of the conductor 3 is the same as the cross-sectional area of the conductor 4.
The side face of the conductor 3 opposite to the wire casing 1 and the side face of the conductor opposite to the wire casing 1 are parallel to the side face of the opposite wire casing.
Example 2:
referring to the structure in the winding slot of the flat-wire motor shown in fig. 1, the trapezoidal wire slot 1 on the iron core is narrow at the lower end close to the axis of the motor and wide at the upper end far away from the axis of the motor. In the slot 1, along the radial direction of the motor, there are 6 conductors, wherein one conductor closest to the air gap 2 is a composite layer conductor 3, and the other five conductors are integral layer conductors 4.
The composite layer conductor 3 is composed of four layers of sub-conductors 31 arranged in the radial direction of the motor, and each sub-conductor 31 is composed of two grandchild conductors 311 arranged in the circumferential direction of the motor.
The monolithic conductor 4 is a monolithic layer in the radial direction of the motor and is composed of two subconductors 411 arranged in the circumferential direction of the motor.
Along the radial direction of keeping away from the motor axis of motor, the width of 6 conductors in wire casing 1 is crescent, and thickness reduces gradually. The composite layer conductor 3 closest to the air gap has the smallest width and the largest thickness. In order to reduce the skin effect of the skin,
the eight thin grandchild conductors 311 form a composite layer conductor 3, and the cross-sectional area of the composite layer conductor 3 is the same as the cross-sectional area of the whole layer conductor 4 formed by the two branch conductors 411.
The side of the grandchild conductor 311 opposite to the slot 1 and the side of the branch conductor 411 opposite to the slot 1 are both parallel to the opposite slot side.
The protection range of this patent does not receive the subconductor number of piles, does not also receive winding tip connection form, connection process etc. and does not receive the influence of the state of the outside conductor of iron core wire casing, connection form etc..
Claims (4)
1. The structure in the winding slot of the flat wire motor is characterized in that a plurality of conductors are arranged in the winding slot along the radial direction of the motor; the method is characterized in that: the wire groove is in a trapezoid shape with the narrow lower end close to the axis of the motor and the wide upper end far away from the axis of the motor, and the width of the conductor far away from the axis of the motor is larger than that of the conductor close to the axis of the motor; the opposite side surface of the conductor is parallel to the side surface of the wire groove; the cross-sectional area of each conductor is equal.
2. The flat wire motor winding slot interior structure of claim 1, wherein: at least one conductor close to the air gap is composed of more than two layers of sub-conductors arranged in the radial direction of the motor, and at least one conductor far away from the air gap is an integral layer in the radial direction of the motor.
3. The flat wire motor winding slot interior structure of claim 1, wherein: at least one sub-conductor is composed of more than two grandchild conductors arranged in the circumferential direction of the motor.
4. The flat wire motor winding slot interior structure of claim 1, wherein: at least one integral layer is composed of more than two sub-conductors arranged in the circumferential direction of the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911131639.2A CN110707851A (en) | 2019-11-19 | 2019-11-19 | Winding slot internal structure of flat wire motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911131639.2A CN110707851A (en) | 2019-11-19 | 2019-11-19 | Winding slot internal structure of flat wire motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110707851A true CN110707851A (en) | 2020-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911131639.2A Pending CN110707851A (en) | 2019-11-19 | 2019-11-19 | Winding slot internal structure of flat wire motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110707851A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112421816A (en) * | 2020-12-25 | 2021-02-26 | 哈尔滨理工大学 | Novel unequal-area transposed flat wire winding permanent magnet motor |
-
2019
- 2019-11-19 CN CN201911131639.2A patent/CN110707851A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112421816A (en) * | 2020-12-25 | 2021-02-26 | 哈尔滨理工大学 | Novel unequal-area transposed flat wire winding permanent magnet motor |
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