Position transmitter with at least one magnetoresistive sensor and associated magnetic multipole wheel

A position transmitter includes at least one magnetoresistive sensor and an associated magnetic multipole wheel having a large number of uniformly arranged pole pairs. The at least one sensor comprises first, second third, and fourth magnetoresistive resistors that are electrically connected as a Wh...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Haas, Gunther, Siegle, Henrik
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A position transmitter includes at least one magnetoresistive sensor and an associated magnetic multipole wheel having a large number of uniformly arranged pole pairs. The at least one sensor comprises first, second third, and fourth magnetoresistive resistors that are electrically connected as a Wheatstone bridge with four half bridges, with a voltage UO being fed in one bridge diagonal and a sinusoidal or cosinusoidal signal being produced on the other diagonal. A distance (d) between the first and second or third and fourth resistors located paral el to one another is selected with reference to a scanning direction of the multipole wheel, such that it is not equal the wavelength of a pole pair. A distance between the first and second resistors and between the third and fourth resistors is the same.