Patent · US Expired

Method of controlling step switches

US6529858B1 · kind B1 · utility

4Cited by

3References

6Claims

0Family size

Assignee

MASCHINENFABRIK REINHAUSEN GMBH · DE

Inventors

Dieter Dohnal · Lappersdorf, DE
Karsten Viereck · Teisendorf, DE
Mario Schmeckebier · Regensburg, DE

Key dates

Filing date	Aug 23, 2001
Grant date	Mar 4, 2003
Priority date	—
Expiry date	Aug 23, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH01H2009/0061
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method of controlling a step switch. From the measured values of current, voltage and phase angle at an electric drive motor during actuation of the step switch the individual picked-up active output is calculated. From the active output the corresponding torque at the drive motor is calculated. The torque in the step switch which is crucial for controlling is determined on the basis of the torque by using a specifically calculated transfer function. The transfer function is newly determined every time the switch is actuated, with the values of the preceding switch operation or the preceding switch operations being taken as a basis of the new calculation.

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