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:
Apr. 11, 2006
Filed:
Jun. 28, 2002
Juergen Halfmann, Buehl, DE;
Ingo Immendoerfer, Buehl, DE;
Juergen Halfmann, Buehl, DE;
Ingo Immendoerfer, Buehl, DE;
Robert Bosh GmbH, Stuttgart, DE;
Abstract
A circuit arrangement for operating an electrical machine having an inductive component. The circuit arrangement includes an electrical switch (TRthrough TR) that applies a pulse-shaped signal (Sthrough S) to the electrical machine. The free-running circuit also includes an electrical switch (TRthrough TR). A comparator () is provided which compares the free-running current flowing in the free-running circuit with a predefined threshold value and, if the current drops below the threshold value, provides a switching signal (SA) that is used to deactivate the switch (TRthrough TR) in the free-running circuit. The circuit arrangement reduces both the electrical power loss in the circuit arrangement and the mechanical power loss in the electrical machine.