Angular position sensor

US10895475B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Ingo Herrmann · Friolzheim, DE
• Thomas Buck · Tamm, DE
• Fabian Utermoehlen · Lippstadt, DE
• Andreas Merz · Freiberg am Neckar, DE
• Dayo Oshinubi · Rutesheim, DE
• Oliver Krayl · Gerlingen, DE
• Stefan Leidich · Rutesheim, DE

Key dates

• Filing date: Oct 13, 2016
• Grant date: Jan 19, 2021
• Expiry date: Jan 17, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D5/204
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An angular position sensor includes a stator element with at least three coils, a rotor element rotatably mounted with respect to the stator element, and an evaluation unit configured to determine an angle of rotation between the rotor element and stator element. The rotor element is configured to inductively couple with each of the at least three coils with varying strengths based on the angle of rotation. The evaluation unit is further configured to supply the coils with alternating voltage in a cyclical manner and in sequence, so that a first respective part of the coils is supplied with alternating voltage and a remaining part is de-energized. The evaluation unit is additionally configured, in a cyclical manner in sequence with one or more de-energized coils, to detect at least one of a respective phase and an amount of an induced alternating voltage, and to determine the angle of rotation therefrom.