Patent · US Expired

Dual motor drive arrangement for a small domestic appliance

US4803390A · kind A · utility

15Cited by

3References

11Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Leo Bertram · Stolberg, DE
Hugo Schemmann · Valkenburg, NL
Romuald L. Bukoschek · Klagenfurt, AT

Key dates

Filing date	Nov 19, 1987
Grant date	Feb 7, 1989
Priority date	—
Expiry date	Nov 19, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/19014
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Two drive motors (251) drive the shaft of a load via a common drive wheel (19), either directly or via further gear wheels. The rotor shafts of the drive motors are constructed as two-pole single-phase synchronous motors having permanent-magnet rotors. The gear wheels mounted on the rotor shafts are oriented in such a way relative to the direction of magnetic polarization of the rotor magnets that when the arrangement is assembled and in mesh, the magnetic orientation of both rotors (27) relative to the main direction of the stator fields is the same for a positive stator current.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.