Patent · US Expired

Method for error detection in a drive mechanism

US7355436B2 · kind B2 · utility

7Cited by

8References

35Claims

0Family size

Assignee

DR. JOHANNES HEIDENHAIN GMBH · DE

Inventors

Georg Zehentner · Teisendorf, DE
Norbert Huber · Erlangen, DE
Eugen Kellner · Berchtesgaden, DE

Key dates

Filing date	Aug 1, 2003
Grant date	Apr 8, 2008
Priority date	—
Expiry date	Apr 30, 2025

Classification

Technology area (CPC H)Electricity
CPC primaryH02H7/122
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method for error detection in a drive mechanism, having a multiphase electric motor and a converter connected upstream thereof, wherein the converter controls voltages of individual phases of the electric motor, and individual phase currents in the individual phases of the electric motor each extend periodically. The method includes measuring a phase current of the electric motor at a predetermined point of a respective period, simultaneously varying a voltage that is associated with the measured phase current and evaluating a measured value of the measured phase current as a function of the voltage that is associated with the measured phase current.

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