Motor using rotor including interior permanent magnet, and apparatus-driving-unit employing the same motor
US6218753A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1999 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Jul 26, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2201/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The motor includes the following elements: a stator-core having plural teeth, and a yoke that links the teeth, coils wound on the teeth in a concentrated winding form, and a rotor with interior permanent magnets. The rotor with interior permanent magnets includes the following elements: a rotor core having plural slits of which ends extend closely to the rotor circumference, permanent magnets positioned in the slits, non-magnetic-sections provided between the circumference of the rotor-core and respective ends of permanent magnets. This construction allows the motor to withstand persistently demagnetization, to be a smaller size with high efficiency, and to be manufactured in a highly efficient manner. The motor can be integrated as a driver into an apparatus driving unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.