Permanent magnet motor, position estimation apparatus and motor drive control apparatus
US10680471B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2015 |
| Grant date | Jun 9, 2020 |
| Priority date | — |
| Expiry date | Oct 31, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/183
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A permanent magnet motor is provided, which includes a rotor including a rotation axle and a plurality of magnetized rotor magnets on a periphery, which rotor magnets are magnetized to form alternately N-poles and S-poles; first and second ring-shaped-claw-pole units, whose inner circumferences face the rotor magnets, including a plurality of first and second claw-poles along the inner circumference, the first and the second claw-poles being closely adjacent to each other extending alternately in upward and downward axis directions of the rotation axle, bottom sides of the first and the second claw-poles forming a ring shape. A first opening portion is formed in a first joint surface of the first ring-shaped-claw-pole unit, to be joined to the second ring-shaped-claw-pole unit, and the second opening portion is formed in a second joint surface of the second ring-shaped-claw-pole unit, to be joined to the first ring-shaped-claw-pole unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.