Method and apparatus for harmonics suppression in motor systems
US4629916A · kind A · utility
14Cited by
8References
31Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 20, 1985 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Mar 20, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A polyphase synchronous motor having a relatively large number of poles, constructed for substantial elimination of all significant harmonics. Harmonics are eliminated by dividing the motor into two symmetrical groupings, each a complete motor, then rotating one grouping relative to the other by an angle .pi./h electrical degrees, where h is the order of the harmonic being suppressed. Also, with a permanent magnet disc rotor, the magnet poles on one face of the disc can be rotated relative to those of the other face in the same manner, to suppress a harmonic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.