NON-CONTACT ROTATIONAL POSITION SENSOR SYSTEM

摘要

A rotational position sensor system includes a magnet carrier (104), first and second radially spaced magnets (106), and a bipolar magnetic sensor (108). The magnet carrier (104) is configured to mount on a rotating body and rotate therewith between first and second fixed positions. The first and second magnets (106) each have first and second magnetic poles, which are coupled to the magnet carrier (104), and a curved outer surface. The curved outer surface of the first magnet has a first arc length, and the curved outer surface of the second magnet has a second arc length that is greater than the first arc length. The bipolar magnetic sensor (108) is mounted adjacent to the magnet carrier (104) and is configured to switch from a first state, when the magnet carrier (104) is in the first fixed position, to a second state when the magnet carrier (104) is in the second fixed position.