Method for operating an electrical network, in particular of a motor vehicle

US8829709B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Beqir Pushkolli · Ludwigsburg, DE
• Stefan Blind · Fellbach, DE
• Daniel Raichle · Lambach, DE
• Gunther Goetting · Stuttgart, DE
• Manfred Stahl · Châteaudun, FR

Key dates

• Filing date: Nov 26, 2008
• Grant date: Sep 9, 2014
• Expiry date: Dec 9, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/72
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method for operating an electrical network, in particular of a hybrid motor vehicle, the network having at least one electrical accumulator, in particular a high-voltage accumulator, at least one electric machine, and at least one inverter controlling the electric machine, the electrical accumulator being electrically disconnected from the network when a malfunction is detected and the inverter being switched to a short-circuit operating mode when a specifiable voltage limit of a network voltage of the network is subsequently exceeded. There is a provision for switching power semiconductors of the inverter in such a way that the driven electric machine induces a voltage and provides it via free-wheeling diodes on the electrical network and the induced voltage is used for operating the electric machine as a generator such that a specifiable network voltage is set by the electric machine.