Patent · US Expired

Position determining

US7401001B2 · kind B2 · utility

5Cited by

6References

3Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Aalbert Stek · Eindhoven, NL
Anthonius Petrus Gerardus Emanuel Janssen · Eindhoven, NL

Key dates

Filing date	Nov 12, 2004
Grant date	Jul 15, 2008
Priority date	—
Expiry date	Nov 12, 2024

Classification

Technology area (CPC G)Physics
CPC primaryG01D5/2448
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A position determining system for determining a position of a rotor of a rotating motor has sensors that are coupled to the rotor. The sensors generate, in response to a rotation of the rotor, a quadrature signal that has sine and cosine components. The position determining system calculates a sum (A2) of a squared value of the sine component (A2sin2x) and a squared value of the cosine component (A2cos2x). An amplitude correction factor (A) is calculated as the squared root of the sum (A2). An amplitude corrected sine component (sin(x)) is obtained by dividing the sine component (Asin(x)) by the amplitude correction factor (A). An amplitude corrected cosine component (cos(x)) is obtained by dividing the cosine component (Acos(x)) by the amplitude correction factor (A).

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