The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 26, 2023
Filed:
Dec. 19, 2019
Robert Bosch Gmbh, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to a method for determining a gain error of at least one current measuring device () of a sensor unit () of an electric machine (), wherein the machine () has a stator winding () having at least three phases (U, V, W) and a rotor () which is mounted so as to be rotatable about an axis of rotation (). According to the invention, an electric sensor voltage () is applied to the phases (U, V, W), the sensor voltage () having at least a first voltage pulse () of a first voltage vector and a second voltage pulse () of a second voltage vector, the first voltage vector and the second voltage vector being oriented in different directions in each case perpendicularly to the axis of rotation (), at least one first current value of a first of the phases (U), at least one second current value of a second of the phases (V) and at least one third current value of a third of the phases (W) are detected during the application of the sensor voltage (), a sum current vector is determined on the basis of the detected current values of all of the phases (U, V, W), and the sum current vector is compared with at least one determined or stored reference current vector, at least one gain error being determined on the basis of the comparison.