Patent · US Active

Sensor device for an electric machine

US8063628B2 · kind B2 · utility

2Cited by

18References

22Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Roland Finkler · Erlangen, DE
Zeljko Jajtic · Birkenfeld, DE
Markus Knorr · Augsburg, DE

Key dates

Filing date	Feb 21, 2007
Grant date	Nov 22, 2011
Priority date	—
Expiry date	May 6, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG01D2205/40
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The aim of the invention is to create an inexpensive sensor system for a movable electric machine in order to determine positions, the sensor signal featuring zero crossings. Said aim is achieved by a sensor device (1) comprising a U-shaped yoke (3) and a sensor (10) which is disposed in/on the yoke (3) to detect a magnetic variable, for example. Magnets (6 to 9) that are or can be inversely magnetized are arranged at a free end of the yoke (3). Opposite magnetic fluxes that can be detected by the sensor (10) can be generated in the yoke (3) in accordance with the position of the magnets (6 to 9) relative to one of the pole teeth (11, 12, 13) of a machine component. Approximately sinusoidal sensor signals can be generated therefrom without having to use several measuring sensors, e.g. in order to regulate a linear motor.

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