Synchronous motor with permanent magnet provided on magnetic pole end
US6211593A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1999 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | Oct 22, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2201/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A synchronous motor comprising permanent magnets (35, 41) with N poles arranged at ends of N magnetic poles of a rotor, permanent magnets (38, 34) with S poles arranged at ends of S magnetic poles of the rotor, magnetic pole portions (40) made of soft magnetic member at middle portion of the N magnetic poles of the rotor, and magnetic pole portions (39) made of soft magnetic member at middle portion of the S magnetic poles of the rotor. The synchronous motor has a structure in which the respective N and S magnetic poles are shifted in the rotor rotation direction relatively by NN/NR of a stator slot pitch, wherein NN and NR are integers equal to or less than the number of poles formed in the rotor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.