Determining armature stroke by measuring magnetic hysteresis curves

US10770212B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Gerald Aydt · Remchingen, DE
• Klemens Steinberg · Lambach, DE
• Marco Beier · Leonberg, DE
• Markus Rueckle · Stuttgart, DE
• Oezguer Tuerker · Gerlingen, DE

Key dates

• Filing date: Nov 28, 2016
• Grant date: Sep 8, 2020
• Expiry date: Sep 30, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01F2007/1861
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

The invention relates to a method for producing a valve (1) that can be electromagnetically actuated which method comprises an electromagnet (2, 2a, 2b), an armature (3) that can be moved by the electromagnet (2, 2a, 2b), and a valve body (5), having means (4, 4a, 4b, 4c) for converting a movement of the armature (3) into an opening or closing of the valve (1), wherein the electromagnet (2, 2a, 2b) and the armature (3) are inserted into the valve body (5), wherein, before the electromagnet (2, 2a, 2b) is inserted into the valve body (5), a magnetic hysteresis curve (10) of a combination (6) of the electromagnet (2, 2a, 2b) having a test armature (3a) lying against said electromagnet (2, 2a, 2b) is recorded, the slope m1 of a first, substantially linear curve segment (11) of the hysteresis curve (10) is determined in the unsaturated state, and, from the slope m1, the slope m1* of a curve segment (31) of a hysteresis curve (30) of the finally assembled valve (1) having the armature (3) lying continuously against the electromagnet (2, 2a, 2b) is determined, said curve segment corresponding to the first curve segment (11). The invention further relates to a method for determining the a…