Electric rotating machine having improved stator coil arrangement for reducing magnetic noise and torque ripple
US8264114B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2010 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Dec 23, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K29/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric rotating machine is disclosed which includes a stator and a rotor. The stator includes a hollow cylindrical stator core and first and second three-phase stator coils. The stator core has a plurality of stator core teeth formed at a predetermined pitch in a circumferential direction of the stator core. Each of the first and second three-phase stator coils is comprised of three phase windings. Each of the phase windings of the first and second three-phase stator coils is wound around each of a predetermined number of the stator core teeth by a predetermined number of turns. The rotor has a plurality of magnetic poles the polarities of which alternate between north and south in the circumferential direction of the stator core. Further, the first and second three-phase stator coils are offset in the circumferential direction of the stator core to have a phase difference of π/6 therebetween.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.