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CN-121984263-A - Armature of slotless motor and preparation method thereof

CN121984263ACN 121984263 ACN121984263 ACN 121984263ACN-121984263-A

Abstract

The embodiment of the application provides a non-slot motor armature and a preparation method thereof, wherein a circuit in the armature is formed by welding conductive strips with trapezoid cross sections, insulating films are only arranged outside the conductive strips without enamelling, and the cross section area of the conductive strips inside the armature is maximized when the armature is used, so that the power density of the motor is effectively improved, and the power density improving effect is more remarkable when the armature is applied to a low-current motor. In the preparation process, the cross section of each prepared conducting strip is ensured to be of a required trapezoid structure by adopting a mode that conducting strips are cut out on a conducting metal tube and finally a plurality of conducting strips are welded into a circuit, meanwhile, the arrangement of one layer of conducting strips is completed after the cutting is completed, winding or arrangement is not needed, and the armature wire cup obtained after the welding is assembled. The whole preparation process is simpler and higher power density can be obtained under the condition that the armature volume of the motor is the same.

Inventors

  • YUAN JINGUO

Assignees

  • 上海炬智灵动科技有限公司

Dates

Publication Date
20260505
Application Date
20260210

Claims (10)

  1. 1. The preparation method of the armature of the slotless motor is characterized by comprising the following steps of: Preparing a plurality of conductive metal pipes which can be nested together in sequence, wherein the number of the conductive metal pipes is even; Cutting a plurality of gaps on the side wall of each conductive metal tube so that the side wall of each conductive metal tube forms a plurality of conductive strips which are sequentially distributed along the circumferential direction of the conductive metal tube, wherein the gaps do not penetrate through the conductive metal tubes in the axial direction so that end rings are reserved at two ends of each conductive metal tube; performing surface insulation treatment on each conductive metal tube so as to form an insulating film on the surface of each conductive metal tube; Sorting a plurality of conductive metal pipes according to the size, and nesting two adjacent conductive metal pipes as a group; when nesting is carried out, the gaps on the two conductive metal pipes are aligned with the conductive strips one by one; Cementing and fixing two mutually nested conductive metal pipes to obtain an armature wire cup; Cutting off the positions of the two ends of the obtained armature wire cup corresponding to the end rings to expose the two end parts of the conducting strips, welding the conducting strips exposed at the two ends of the armature wire cup to enable all the conducting strips to be connected to form a circuit, and welding the outgoing lines with the circuit; and (3) assembling and bonding all the armature wire cups which are welded.
  2. 2. The method of manufacturing an armature of a slotless motor according to claim 1, wherein the thickness of the plurality of conductive metal pipes is different, and the thickness of the conductive metal pipe is larger as the inner diameter is smaller.
  3. 3. The method of claim 1, wherein the cross-sectional areas of the conductive bars on each of the conductive metal pipes are equal.
  4. 4. The method for manufacturing a motor armature without a groove of claim 1, wherein the gap is 0.03 mm-0.2 mm.
  5. 5. The method of claim 1, wherein the cross-sectional area of the conductive strip is less than 1mm 2 .
  6. 6. The method for manufacturing a motor armature without a groove of claim 1, wherein the cross section of the conductive bar has a trapezoidal structure, and one end of the cross section of the conductive bar along the outer diameter direction of the conductive metal tube has a long side, and one end of the cross section of the conductive bar along the inner diameter direction of the conductive metal tube has a short side.
  7. 7. The method for manufacturing the armature of the slotless motor of claim 1, wherein the cutting method is cutting by means of laser cutting, electrochemical cutting or electric spark cutting.
  8. 8. The method of claim 1, wherein the insulating treatment is one of spraying, dipping, encapsulating, injection molding or electrochemical treatment.
  9. 9. The method for manufacturing an armature of a slotless motor of claim 1, wherein the thickness of the insulating film is 0.005mm to 0.1mm.
  10. 10. A slotless motor armature, characterized in that it is obtained by the method for manufacturing a slotless motor armature according to any one of claims 1 to 9.

Description

Armature of slotless motor and preparation method thereof Technical Field The application relates to the technical field of motors, in particular to a non-slot motor armature and a preparation method thereof. Background Along with the continuous development of the robot field, the control requirement on the flexibility of the robot joint is higher and higher, and more high-precision servo motors are used as slotless motors at present. The armature space utilization rate of the armature, which is made of wires with circular cross sections, is lower because wires on the armature are in line contact, and meanwhile, the space utilization rate of the motor is further reduced because the paint film proportion of the fine round enameled wires is larger than the section proportion of copper. In addition, the prior art also has a non-slot armature wound by enamelled wires with rectangular cross sections, but because the round angles of the enamelled wires are all larger than 0.3mm in the manufacturing process of the wire, the cross sections of the wire are all larger than 1mm 2, and therefore the wire cannot be effectively applied to a high-precision small-current non-slot motor. Disclosure of Invention The application provides a non-slot motor armature and a preparation method thereof, which aim to solve the technical problem of low space utilization rate of a small-current non-slot motor armature in the prior art, so as to effectively improve the space utilization rate of the small-current non-slot motor armature and further improve the power density of a motor. In order to achieve the above purpose, the application adopts the following technical scheme: The armature of the slotless motor comprises a plurality of armature wire cups which are fixedly nested together, wherein each armature wire cup comprises two annular conductors which are mutually nested together; the annular conductor comprises a plurality of conductive strips uniformly arranged along the circumferential direction of the annular conductor, an insulating film is arranged outside the conductive strips, the section of each conductive strip is of a trapezoid structure, one end of the section of each conductive strip along the outer diameter direction of the annular conductor is a long side, and one end of the section of each conductive strip along the inner diameter direction of the annular conductor is a short side; The number of the conductive strips on the two annular conductors on the armature wire cup is the same, and a circuit is formed between the conductive strips on the two annular conductors on the armature wire cup in a welding mode. Further, the cross-sectional area of the conductive strip is less than 1mm 2. Further, the conductive strips are arranged obliquely along the circumferential direction of the annular conductor. Further, the conductive strip may further include a first inclined section, a vertical section, and a second inclined section connected in sequence, the first inclined section and the second inclined section being aligned in an inclined direction such that the first inclined section and the second inclined section are parallel to each other. Further, welding sections are further arranged at the two opposite ends of the conducting strip respectively, and the welding sections are arranged in parallel with the axis of the annular conductor. Further, the width of the interval between the welding sections on two adjacent conducting strips is larger than the width of the gap. Further, the thickness of the insulating film is 0.005mm to 0.1mm. Further, the cross sections of the conductive strips on the annular conductors are the same, and the gaps between two adjacent conductive strips on the annular conductors are the same. Further, the size of the gap is 0.03 mm-0.2 mm. Further, when the armature wire cups are mutually nested, the conducting strips and the gaps on each armature wire cup are aligned one by one. A preparation method of a non-slot motor armature comprises the following steps: Preparing a plurality of conductive metal pipes which can be nested together in sequence, wherein the number of the conductive metal pipes is even; Cutting a plurality of gaps on the side wall of each conductive metal tube so that the side wall of each conductive metal tube forms a plurality of conductive strips which are sequentially distributed along the circumferential direction of the conductive metal tube, wherein the gaps do not penetrate through the conductive metal tubes in the axial direction so that end rings are reserved at two ends of each conductive metal tube; performing surface insulation treatment on each conductive metal tube so as to form an insulating film on the surface of each conductive metal tube; Sorting a plurality of conductive metal pipes according to the size, and nesting two adjacent conductive metal pipes as a group; when nesting is carried out, the gaps on the two conductive metal pipes are aligned with the co