Direct current dynamoelectric machines with auxiliary equalizer poles
US4521709A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1982 |
| Grant date | Jun 4, 1985 |
| Priority date | — |
| Expiry date | Sep 8, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K23/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a rotating machine, for example heteropolar, auxiliary poles (14) are placed in practically the field poles (4) and close to the peripheral of a salient section (.delta.) of rotor (2), the same azimuth symmetry plane as the poles are supplied by a current (i) regulated by a power supply and auxiliary regulation device (16), the armature current (I) and rotation speed (N) of the rotor expose armature conductors (8) in commutation to an equalizing flux providing for arc-free commutation. Auxiliary poles can be supplied with a current regulated by the field current to cancel the currents flowing in the armature conductors on the field poles. These machines, for example also acyclic with voltage step-up, have high specific power and efficiency, and can be employed for example, in electric traction or propulsion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.