Electric two-motor drive
US4271380A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1978 |
| Grant date | Jun 2, 1981 |
| Priority date | — |
| Expiry date | Sep 29, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K99/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An induction and universal (commutator) motor combination which share a common lamination core and are supplied by a single-phase line. The stator and rotor are provided with multiple poles and phase windings. A winding system for at least one rotor phase winding is common to commutator motor as well as induction motor operation. A lap winding is connected to a commutator, said lap winding having a coil span corresponding approximately to a single pole pitch of the commutator motor stator winding and corresponding as well to an uneven integral multiple of the coil span of the multi-pole induction motor stator winding. The invention finds particular application in regard to drives for automatic washing machines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.