Flat wire short-pitch wave winding structure
By adopting a three-phase flat wire short-pitch wave winding structure in a flat copper conductor motor, embedding 2r layers of flat wire with a staggered design, the harmonic problem of the full-pitch winding is solved, thereby improving the motor torque performance and simplifying the manufacturing process.
Patent Information
- Application Number
- CN202211326612.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-10-25
- Publication Date
- 2026-04-24
- Estimated Expiration
- 2042-10-25
AI Technical Summary
The full-pitch windings of existing flat copper conductor motors result in a large proportion of odd-order harmonics, causing torque pulsation, cogging torque pulsation, and harmonic losses, making it difficult to meet the miniaturization and high-speed requirements of new energy vehicles.
The three-phase flat wire short-pitch wave winding structure is adopted. By embedding 2r layers of flat wire in the stator slot, each phase winding structure has two branches connected in parallel, and adjacent coils are staggered by one slot. Combined with the specific span design of the U-shaped structure end and the welded end, a 60° phase band short-pitch winding is formed.
It effectively reduces odd-order harmonics, improves the motor's torque ripple and cogging torque performance, enhances the motor's torque performance and efficiency, and simplifies the manufacturing process.