Patent · US Expired

Measuring device for determination of rotary angle between stator and rotor

US6130535A · kind A · utility

21Cited by

3References

6Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Werner Herden · Gerlingen, DE
Friedrich Bielert · Oettingen, DE

Key dates

Filing date	Feb 9, 1998
Grant date	Oct 10, 2000
Priority date	—
Expiry date	Feb 9, 2018

Classification

Technology area (CPC G)Physics
CPC primaryG01B7/30
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A measuring device for contactless determination of a rotary angle consists of a rotor (11) and a stator (10). Two ring magnets (21, 22) are disposed in the inner wall of the rotor (11), which have oppositely oriented magnetic polarities. A Hall element (16) is arranged in a slit-like air gap (14) in the stator (10). Furthermore, an additional magnet (17) is located in a second slit-like air gap (15), which creates a magnetic bias in the Hall element (16), so that the linear measuring area A does not have a change of sign.

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