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A Hall Effect Rotary Position Sensor
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English
Abstract
Rotary position sensors (RPS) currently are applied widely in engine management systems for throttle position sensing and are being considered for other applications such as drive-by-wire. The potentiometer RPS relies on contact between a resistive element and a wiper and thus has an inherent wear mechanism.
This paper describes a noncontacting RPS which is essentially a drop-in replacement for the present device. A linear output Hall Effect IC is key to achieving the required functionality, but it must be combined with a magnetic actuation scheme which provides a very linear and stable magnetic field as a function of input angle and packaging which provides long life and control of mechanical tolerances. Each of these design elements will be discussed.
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Authors
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Citation
Bicking, R., Wu, G., Murdock, J., Hoy, D. et al., "A Hall Effect Rotary Position Sensor," SAE Technical Paper 910270, 1991, https://doi.org/10.4271/910270.Also In
References
- Riley, R. E. “High Performance Resistive Position Sensors” SAE Paper # 890302
- “Linear Hall Sensor” 1990