Patent · US Expired

Method and apparatus for determining the rotor position of synchronous motors

US6249094A · kind A · utility

18Cited by

7References

10Claims

0Family size

Assignee

Diehl AKO Stiftung & Co. KG · DE

Inventors

Stefan Zeh · Schallstadt, DE
Martin Weinmann · Bad Waldsee, DE

Key dates

Filing date	Sep 17, 1999
Grant date	Jun 19, 2001
Priority date	—
Expiry date	Sep 17, 2019

Classification

Technology area (CPC H)Electricity
CPC primaryH02P6/182
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Described is a method of determining the rotary position of the rotor of a synchronous motor, in relation to the rotating magnetic stator field. The instantaneous rotor position is ascertained by measurement of the emf (E.s) induced in at least one stator winding by the rotor in a current gap in the stator current (I.s) flowing through said stator winding, wherein in accordance with the invention when using a sinusoidal or quasi-sinusoidal stator current an artificial current gap in the stator current is produced. In that case the induced emf (E.s) is directly derived from the tapped-off terminal potential (U.s) of the respective stator winding.

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