一种水轮发电机定子线圈
By employing a 360° complete transposition design and specific strand materials in the stator coils, the energy loss problem caused by the circulating current within the stator bars was solved, thereby improving the energy conversion efficiency and enhancing the operational stability of the motor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA YANGTZE POWER
- Filing Date
- 2025-07-16
- Publication Date
- 2026-07-17
AI Technical Summary
Circulating currents are easily generated inside the stator bars, leading to energy loss.
The design employs a 360° fully interchangeable structure, ensuring that the strands in the upper and lower layers of the stator are in the same magnetic position along the axial length of the stator slot. Combined with specific strand materials and insulation structures, this optimizes electromagnetic performance and insulation reliability.
It significantly reduces the additional losses from circulating current, improves the energy conversion efficiency of the motor, reduces operating energy consumption, and enhances the stability and safety of the stator coil.
Smart Images
Figure CN224520799U_ABST
Abstract
Claims
1. A hydrogenerator stator coil, characterized by: The upper layer bar (a) and the lower layer bar (b) are arranged in the stator slot respectively, the strands in the upper layer bar (a) and the lower layer bar (b) are all 360° full transposition, and each strand is in the same magnetic position in the axial length of the stator slot.
2. A hydrogenerator stator coil according to claim 1, characterized in that: The strand width is one sixth of the transposition pitch.
3. A hydrogenerator stator coil as claimed in claim 1, characterized in that: The strands are transposed around the 0.3mm insulation plate (f).
4. A hydrogenerator stator coil according to claim 3, characterized in that: The insulation plate (f) is an epoxy glass powder mica multi-glue plate.
5. A hydrogenerator stator coil as claimed in claim 1, characterized in that: The strands are double-polyester glass silk wrapped flat copper wires.
6. A hydroelectric generator stator coil as defined in claim 1 wherein: The strand width is 7.31mm, the strand thickness is 2.01mm, and the two sides of the strand are provided with 0.3mm insulation material, which is an epoxy glass powder mica multi-glue sheet.
7. A hydroelectric generator stator coil as claimed in claim 1, wherein: The number of strands in a single upper layer bar (a) or lower layer bar (b) is 88, the upper layer bar (a) or lower layer bar (b) is coated with F-grade tung oil horse epoxy glass powder mica tape, and the single-sided thickness is 4.8mm.
8. A hydroelectric generator stator coil as defined in claim 1 wherein: The two ends of the bar are provided with conductive ends (c) with a length of 105mm, the conductive ends (c) are provided with a sealing layer (d), and the sealing layer (d) uses B-Cu89Pag solder.
9. A hydroelectric generator stator coil as defined in claim 1 wherein: The distance between the lower surfaces of adjacent bars in the same layer is 78.9mm, and the distance between the hypotenuses of adjacent bars is not less than 26mm.
10. A hydroelectric generator stator coil as claimed in claim 1, wherein: The stator slot is provided with a low-resistance anti-corn structure, the end of the stator slot is provided with inner and outer anti-corn structures, the inner anti-corn structure includes a plurality of anti-corn materials continuously overlapped, the outer anti-corn structure is a high-resistance anti-corn structure, and an additional insulation structure is arranged between the inner and outer anti-corn structures.