Patent · US Active

Apparatus for sensorless positioning with signal amplifier

US8344683B2 · kind B2 · utility

1Cited by

5References

12Claims

0Family size

Assignee

Conti Temic microelectronic GmbH · DE

Inventors

Wolfgang Schulter · Meersburg, DE
Stefan Rau · Wiesloch, DE
Helmut Weber · Webster, US
Thomas K. Grunder · Beloit, US
Carsten Sensche · Donauwörth, DE

Key dates

Filing date	Jun 17, 2008
Grant date	Jan 1, 2013
Priority date	—
Expiry date	Mar 7, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH03F2203/45586
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A device and a method for determining the current position of a rotor, particularly the angle of rotation of the rotor, of an electric motor, wherein said device determines the current position of the rotor using the fluctuations of the armature current or the armature voltage of the electric motor. The fluctuations of the armature current or the armature voltage are separated from the fluctuations of the motor current or the motor voltage with the help of an amplifier unit dependent on a controllable offset value. The offset value is changed according to the motor current or the motor voltage. By virtue of the device and the method, the fluctuations of the armature current or the armature voltage can be separated from the fluctuations of the motor current or the motor voltage over the full measurement range of the motor current or the motor voltage.

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