Patent · US Active

System for estimation of position and speed in a permanent magnet rotor of an electrical motor

US7999498B2 · kind B2 · utility

4Cited by

0References

18Claims

0Family size

Assignee

Baumueller Nuernberg GmbH · DE

Inventors

Fritz Rainer Gotz · Kirchheim unter Teck, DE
Viktor Barinberg · Erbach, DE
Franz Jäger · Koblenzer Straße, DE

Key dates

Filing date	Jul 22, 2008
Grant date	Aug 16, 2011
Priority date	—
Expiry date	Apr 12, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH02P21/18
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Procedure for estimating the electrical drive speed and position of a permanent magnet rotor of a brushless electrical linear or rotating motor, especially for a drive control circuit, using multi-phase current measurements on the motor, whose measurement values, depending on the estimated position, are transformed into a rotor-related d,q reference frame i.e. into a direct current vector component and a quadrature current vector component, and the direct and quadrature vector components of current and a voltage, together with the estimated speed, are fed as input variables to a mathematical motor model, and the motor model generates a first output variable and a second output variable, whereby the first output variable in the d,q reference frame corresponds to the d or direct vector component as well as to a position estimation error, and the second output variable in the d,q reference frame corresponds to the q or quadrature component as well as to a speed estimation error, and the two output variables are fed to a tracking controller for estimating and outputting the position and/or speed, whereby from the motor model a third output variable is computed, by

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