Axially multi-pole magnetized magnet and device for angle detection using such a magnet

摘要

The invention relates to an axially multi-pole magnetized magnet (10, 40, 100), which over a distance range to its axis over the rotation angle (φ) varying thickness D (φ), wherein the thickness D (φ) at least partially results by the addition of a constant D0 and the sum of a sum of cosine functions with a fundamental and its odd harmonics, comprising at least terms up to the fifth harmonic according to D (φ) = D0 + ABS [D1 * cos (2N-1 * φ) + D2 cos (2N-1 * 3φ) + D3 * cos (2N-1 * 5φ)], where N is a given positive integer, D0 is zero or one positive, the quotient D2 / D1 is a negative and the quotient D3 / D1 is a positive one Value is ABS (D1) ≥ ABS (D2) ≥ ABS (D3), and where ABS [] or ABS () denotes the respective amount of the number enclosed by the bracket.