US 12,259,261 B2
Inductive position sensor
Marcus Irrgang, Luenen (DE); Johannes Nordhorn, Herzebrock-Clarholz (DE); and Marc Seiffert, Lippstadt (DE)
Assigned to Hella GmbH & Co. KGaA, Lippstadt (DE)
Filed by HELLA GmbH & Co. KGaA, Lippstadt (DE)
Filed on Dec. 2, 2022, as Appl. No. 18/074,001.
Application 18/074,001 is a continuation of application No. PCT/EP2021/063902, filed on May 25, 2021.
Claims priority of application No. 10 2020 114 861.5 (DE), filed on Jun. 4, 2020.
Prior Publication US 2023/0101886 A1, Mar. 30, 2023
Int. Cl. G01D 5/20 (2006.01); B22D 11/10 (2006.01); B22D 41/50 (2006.01)
CPC G01D 5/2053 (2013.01) [B22D 11/10 (2013.01); B22D 41/50 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An inductive position sensor comprising:
a stator element having an exciter coil to which a periodic alternating voltage is applied and having a receiving system, a signal of the exciter coil being inductively coupled into the receiving system;
a rotor element that influences a strength of the inductive coupling between the exciter coil and the receiving system according to an angular position of the rotor element relative to the stator element; and
an evaluation circuit to determine the angular position of the rotor element relative to the stator element from voltage signals induced in the receiving system,
wherein the inductive position sensor has an unambiguous range E, in which the angular position is unambiguously determined,
wherein the receiving system extends over a first angular range,
wherein the first angular range is N1=n*E where n≥1,
wherein the exciter coil extends over a second angular range,
wherein the second angular range is N2=m*E where m≥2,
wherein m and n are positive whole numbers and m>n, and
wherein the unambiguous range E is determined according to the formula:
E=360°/Number of blades of the rotor element.