Patent · US Expired

Self-starting two-pole single-phase synchronous motor

US4948999A · kind A · utility

6Cited by

17References

3Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Leo Bertram · Stolberg, DE
Romuald L. Bukoschek · Klagenfurt, AT

Key dates

Filing date	Mar 2, 1989
Grant date	Aug 14, 1990
Priority date	—
Expiry date	Mar 2, 2009

Classification

Technology area (CPC H)Electricity
CPC primaryH02K21/185
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In a self-starting two-pole single-phase synchronous motor with a permanent magnetic rotor, which as a result of diametrical magnetization comprises two opposite pole faces on its circumference, the rotor is made of a plastics-bonded anisotropic magnetic material, the two opposite pole faces each being limited to an angular range of the rotor circumference starting from the rotor axis, which is smaller than 90.degree..

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