Circuit arrangement for the actuation of an electric-motor drive, in particular a pump drive, in a large domestic appliance
US6969969B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 2003 |
| Grant date | Nov 29, 2005 |
| Priority date | — |
| Expiry date | Jul 16, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P5/74
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A large domestic appliance has main and auxiliary drives (17, 24) thereof supplied from the same dc voltage intermediate circuit (19) which is provided only once, by way of change-over switch sets (12), by half-bridge circuits (21, 21′). For that purpose a frequency converter (15) with its bridge circuit (21) for the main drive (17) is switched over in single-pole or multiple mode to the rotary field motor (23, 25) of the auxiliary drive (24) by way of a change-over switch set (12) connected in its output-side motor lines (13); or in the frequency converter (15) two half-bridge circuits (21, 211) which are associated with the main and the auxiliary drives (17, 24) are operated in parallel from the dc voltage intermediate circuit (19).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.