Patent · US Expired

Process for reducing hysteresis effects, and an electromechanical transducer in which hysteresis effects are reduced in this way

US5422556A · kind A · utility

6Cited by

5References

8Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Friedrich Graf · Eggenfelden, DE
Michael Ulm · Alteglofsheim, DE
Klaus Starker · Neutraubling, DE

Key dates

Filing date	Mar 29, 1993
Grant date	Jun 6, 1995
Priority date	—
Expiry date	Mar 29, 2013

Classification

Technology area (CPC G)Physics
CPC primaryG05D3/18
WIPO fieldControl
WIPO sectorInstruments

Abstract

An actuator element of an electromagnetic transducer which converts an electric current into an associated mechanical variable, for example an oil pressure, a displacement or a force, has hysteresis which is reduced by the fact that a periodic fluctuation component (jitter current) is superimposed on an actuator current. The influence of the operating parameters of the actuator element (for example of the temperature) on the hysteresis is eliminated by the fact that the frequency or the amplitude of the fluctuation component is varied in dependence on the operating parameter.

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