Electric motor with a permanent magnet embedded rotor with curved magnets and magnet accommodation holes of varying radiuses
US10084354B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2013 |
| Grant date | Sep 25, 2018 |
| Priority date | — |
| Expiry date | Aug 20, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2213/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An interior permanent magnet motor capable of increasing an output of a motor without reducing torque by increasing demagnetization resistance. The interior permanent magnet motor includes a rotator including a rotator core, and a stator. The rotator core includes a plurality of magnet accommodating holes and a plurality of permanent magnets. The thickness in the short-side direction of each of the magnet accommodating holes is minimum at the center portion of the magnetic pole, and is gradually increased toward the radially outer side of the rotator core. At least the thickness in the short-side direction of the permanent magnet at the center portion of the magnetic pole is equal to the thickness in the short-side direction of the magnet accommodating hole at the center portion of the magnetic pole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.