Wheel Speed Sensor Applying the Eddy Current Effect Through the High-Frequency Modulated Magnetic Field

Paper #:
  • 960755

Published:
  • 1996-02-01
Citation:
Teramae, K., Fukuzono, H., Nishimura, H., Nagata, S. et al., "Wheel Speed Sensor Applying the Eddy Current Effect Through the High-Frequency Modulated Magnetic Field," SAE Technical Paper 960755, 1996, https://doi.org/10.4271/960755.
Pages:
14
Abstract:
This active-drive wheel speed sensor, developed by the high-frequency magnetic system, enables detection of very slow wheel speeds - hitherto difficult to accomplish with any conventional type of Magnetic Pick up - by applying the eddy current effect through the high-frequency magnetic field. The following report presents an analysis of the magnetic circuit which integrates the magnetic-field generating coil with the detection rotor, and the unique circuit system which ensures strength against eccentricity of the wheel rotor and air gap variations, etc.
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