Control circuit and method for checking the plausibility of a rotor position angle

US10775209B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Benjamin Lechner · Bad Liebenzell, DE
• Daniel Zirkel · Mühlacker, DE
• Daniel Raichle · Lambach, DE
• Michael Ungermann · Gelnhausen, DE

Key dates

• Filing date: Jun 7, 2016
• Grant date: Sep 15, 2020
• Expiry date: Jan 31, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02P6/34
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present invention provides a control circuit (10; 110; 210; 310) and a method for checking the plausibility of a rotor position angle. The control circuit is designed with: a rotor position angle determination device (12) for determining a first rotor position angle, φ(tk), at a first time, tk, and at least one second rotor position angle, φ(tk−1), at a second time, φk−1, before the first time, tk; a computing device (14; 114; 214; 314) for determining a rotor position angle, mod(tk), to be expected at the first time, tk, from a computational model of the computing device (14; 114; 214; 314) using at least the second rotor position angle, φ(tk−1); and a plausibility-checking device (16) for outputting a signal (51) which indicates the determined first rotor position angle, φ(tk), as plausible if an amount of a difference between the rotor position angle, mod(tk), to be expected and the determined first rotor position angle, φ(tk), does not exceed a predetermined threshold value.