ROTOR, MOTOR AND WIPER MOTOR
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- MITSUBA CORP
- Filing Date
- 2019-10-01
- Publication Date
- 2026-06-03
AI Technical Summary
Conventional SPM type rotors face issues with increased operating noise and material cost due to permanent magnet rattling and displacement, which are exacerbated when the circumferential width of the magnet is smaller than the width between salient poles, and the radial wall thickness is increased to compensate.
The rotor design features salient poles and permanent magnets with specific geometric configurations, including off-centered arc centers and controlled angles and distances, to minimize magnet-salient pole contact and reduce the circumferential movement range of the magnets, thereby reducing noise and material cost.
This design suppresses operating noise and rotor characteristic deterioration while minimizing material cost by ensuring only the radially outermost side of the magnet contacts the salient pole, narrowing the circumferential movement range and reducing the radial wall thickness of the permanent magnet.