Patent · US Active

System for seamless estimation of speed and/or position, including standstill of a permanent magnet rotor of an electric motor

US8008878B2 · kind B2 · utility

6Cited by

8References

19Claims

0Family size

Assignee

Baumueller Nuernberg GmbH · DE

Inventors

Fritz Rainer Gotz · Kirchheim unter Teck, DE
Viktor Barinberg · Erbach, DE

Key dates

Filing date	Aug 5, 2008
Grant date	Aug 30, 2011
Priority date	—
Expiry date	Jan 26, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH02P2203/05
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Procedure for determining the electrical drive speed (ωef) and/or position (φe) in a permanent magnet rotor of a brushless electrical linear or rotary motor from a measurement of a multi-phase stator current (i1,i2). Speed is determined using a mathematical motor model (9). From the influence of a rotor reverse EMK that affects the stator current (i1,i2) conclusions are made about the rotor speed (ωef) and/or position (φe) and an appropriate model speed value (13,19,23) is generated.

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