Three-phase toroidal coil type permanent magnet electric rotating machine
US6765321B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 17, 2002 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Jul 13, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K37/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A three-phase toroidal coil type electric rotating machine including a rotor that includes a cylindrical permanent magnet having M pairs of N-poles and S-poles that are alternatively arranged around a rotor axis, and a stator that includes three stator units stacked in an axial direction around the cylindrical permanent magnet. Each stator unit has a pair of stator magnetic poles and a toroidal coil sandwiched therebetween. Each stator magnetic pole has M pieces of claw poles extending in the axial direction. The claw poles of the stator magnetic poles are in mesh with each other inside the toroidal coil. The toroidal coils are connected as a delta connection. The positional relationship between the claw poles and the cylindrical permanent magnet is determined such that the phase differences among speed electromotive forces caused in the toroidal coils are 120 degrees (electrical angle) between any two of the three terminals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.