Abstract
Linear Hall element's output voltage is directly proportional to its external magnetic field intensity, but usually, the filed intensity of some point around a magnet is not in linear relation with the distance between them. In order to get a good linear output for speed regulating handle which is based on linear Hall element, the author applies linear Hall element SS495A and describes layouts of different combination like double Hall elements with double magnets, single Hall element with double magnets. Least square fit is done to every layout through experiments and then relation curve of the rotation angle between output voltage of SS495A and magnets is obtained. Corresponding applicable situation is also given. Experiments show that output linearity of these two methods is good. These two layout methods can be easily operated and they are applicable for small-scale speed regulating handle.
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