Patent · US Expired

Motor having rotor capable of both stepped rotary and axial shift motions

US4920292A · kind A · utility

17Cited by

6References

42Claims

0Family size

Assignee

Papst Motoren GmbH & Co KG · DE

Inventors

Klaus Albrecht · Mainz, DE
Helmut Hans · St. Georgen, DE
Johann von der Heide · Winterthur, CH
Fritz Schmider · Hornberg, DE

Key dates

Filing date	Aug 28, 1987
Grant date	Apr 24, 1990
Priority date	—
Expiry date	Aug 28, 2007

Classification

Technology area (CPC H)Electricity
CPC primaryH02K2201/18
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A step motor which, in addition to an exciter system for step-by-step movement, is provided with an axial exciter system. As a result of the direct or indirect influence of the magnetic field generated by the secondary exciter system on the rotor which is supported, so as to be able to move in an axial direction with respect to the stator, the rotor can be induced to move in a direction perpendicular to its step-by-step rotary motion, as well. Both exciter systems can be energized independently of one another, so that step-by-step rotary movement can be performed at any axial position of the rotor and the rotor can be made to move in an axial direction during its rotary movement as well as when it is at rest.

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