Patent · US Active

Device and method for operating an electric machine

US9825576B2 · kind B2 · utility

1Cited by

7References

11Claims

0Family size

Assignee

Robrt Bosch GmbH · DE

Inventors

Tino Merkel · Schwieberdingen, DE
Andreas C. Koenig · Rockford, US
Marc Rudolph · Erligheim, DE
Lingling Xie · Ludwigsburg, DE
Guenther Plapp · Echterdingen, DE

Key dates

Filing date	Nov 14, 2014
Grant date	Nov 21, 2017
Priority date	—
Expiry date	Nov 14, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/64
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The present invention provides a method and a device for operating an electric machine for a soft changeover from a normal or free-wheel mode to an active short-circuit. To this end, a voltage with which the electric machine is actuated is first reduced in a defined manner to a predefined, preferably very low value and then the phase connections of the electric machine are short-circuited. Excessively high overcurrents, particularly overcurrents greater than the nominal current of the electric machine, can thus be avoided.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.