Anti-clogging offset for rotor of synchronous motor
US5010266A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1989 |
| Grant date | Apr 23, 1991 |
| Priority date | — |
| Expiry date | Apr 25, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K1/2773
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotor (32) is constructed by arranging unitary rotor elements (34a, 34b) in a longitudinal direction thereof, and has a structure such that the angular position of each group of elements is shifted by an angle corresponding to a half wave of a slot ripple caused by the rotor in the prior art. Because the difference between the angular positions is generally small, and the rotor must be exactly constructed, rotor core elements (36a) and permanent magnet elements (38a) of each unitary rotor element (34a, 34b) are shifted in the longitudinal direction of the rotor (32) to form projections and recesses (54, 56) at the ends of each unitary rotor element (34a, 34b), and the ends of each unitary rotor element are held exactly in position by metal end plates (42a, 42b, 44a, 44b), formed by a mechanical press, having recessed portions (48) and projecting portions (46) which engage with the projections and recesses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.