Magnetic encoder for producing an index signal

摘要

A magnetic encoder has a high resolution track including a plurality of North/South pole pairs defining a plurality of pole junctions, and a reference track including a North/South pole pair defining a North/South pole junction aligned with a first pole junction of the high resolution track, and a South/North pole junction aligned with a second pole junction of the high resolution track. Only a single pole junction of the high resolution track is positioned between the first and second pole junctions of the high resolution track.

主权项

1. A magnetic encoder comprising:
a high resolution track including a plurality of North/South pole pairs defining a plurality of pole junctions; and a reference track including only a single North/South pole pair defining a single North/South pole junction aligned with a first pole junction of the high resolution track, and a single South/North pole junction aligned with a second pole junction of the high resolution track; wherein only a single pole junction of the high resolution track is positioned between the first and second pole junctions of the high resolution track; and wherein a signal generated by the encoder at a location of the single pole junction of the high resolution track positioned between the first and second pole junctions defines an index pulse that is the only index pulse generated over an entire length of the encoder.