Improvement to magnetic field sensor operating with magnetic field probe enable larger distance between rotor wheel and measurement arrangement whilst achieving accurate measurements

摘要

The magnetic field sensor (21,22) has a differential magnetic field probe with two Hall probes in the magnetic flux of an arrangement with a permanent magnet or electromagnet. A flux feedback yoke (3) of magnetic material contains magnets (33) for magnetic flux (35) to be closed via the object. The yoke is arranged in the sensor to avoid an air gap (d1-d3) for the flux that is larger than structurally unavoidable.