Patent · US Active

Method and device for determining a rotor position of an electronically commutated electric machine

US9915517B2 · kind B2 · utility

2Cited by

1References

14Claims

0Family size

Assignee

ABB Schweiz AG · CH

Inventors

Simon Feuersaenger · Siegen, DE
Mario Pacas · Siegen, DE
Christian Stulz · Bellinzona, CH

Key dates

Filing date	Aug 25, 2014
Grant date	Mar 13, 2018
Priority date	—
Expiry date	Jul 24, 2036

Classification

Technology area (CPC H)Electricity
CPC primaryH02P6/185
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method is disclosed for determining a rotor position of an electrically excited electrical machine by injecting voltage test signals at a plurality of space vector angles with a fundamental frequency which lies in a frequency range in which there is a difference in admittance in space vector angles; calculating resulting values of an excitation current indicator variable as Fourier coefficients of the excitation current resulting from the voltage test signal with reference to the fundamental frequency of the voltage test signal at the corresponding space vector angles; and determining the rotor position on the basis of the profile of the excitation current indicator variable.

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