Off-axis angle position sensor using array of spiral magnet and method of using the same

An angle position sensor system for detecting angle position of a movable member along a defined path, comprising:

• an arc magnet array defining an arc path and configured to be coupled to the movable member, the arc magnet array comprising at least two magnetized pole layers arranged in a spiral pattern and having a tilt angle;
• and
• a magnetic field sensor disposed proximate to the arc magnet array, wherein:
• the arc magnet array is movable relative to the magnetic field sensor,
• the magnetic field sensor is configured to generate one or more periodic position signals having N number of periods per arc cycle along the arc path defined by the arc magnet array,
• the N number of periods is based at least in part on the tilt angle of the arc magnet array,
• the magnetic field sensor is configured to transmit the one or more periodic position signals to a controller associated with the movable member, and
• the angle position of the movable member is determined based at least in part on the one or more periodic position signals.