Patent · US Active

Method and device for calibrating a position sensor placed on a shaft of a permanent magnet synchronous motor

US8106618B2 · kind B2 · utility

5Cited by

10References

7Claims

0Family size

Assignee

Daimler AG · DE

Inventors

Radomir Fabis · Eppelheim, DE
Marcus Heller · Farmington Hills, US

Key dates

Filing date	Apr 2, 2009
Grant date	Jan 31, 2012
Priority date	—
Expiry date	Aug 5, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH02P21/0025
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In a method and apparatus for calibrating a position sensor mounted on the shaft of a permanent magnet synchronous motor, to control the position of a rotor of the permanent magnet synchronous motor relative to a magnetic field produced by a stator of the permanent magnet synchronous motor, a DC test current is supplied to stator windings of the permanent magnet synchronous motor to generate a definite magnetic field. The motor speed caused by the DC test current is adjusted to zero by modifying the rotor position; and the position measured by the position sensor at zero motor speed relative to the magnetic field is used to calibrate the position sensor.

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