Motor with built-in permanent magnets
US5945760A · kind A · utility
49Cited by
7References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1997 |
| Grant date | Aug 31, 1999 |
| Priority date | — |
| Expiry date | Sep 12, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotor of a motor includes a plurality of sets of permanent magnets 8a, 8b embedded in the rotor. Each includes a permanent magnet at an inner side and another permanent magnet at an outer side with a distance between them. Each permanent magnet 8a, 8b is formed like an arch projecting towards the center of the rotor. Magnetic flux flows easily through an interval between the permanent magnets at inner and outer sides, and the inductance in a q-axis is enlarged. Then, the reluctance torque is generated in addition to the magnet torque, and the motor has a high torque and a high output power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.