Schaltungsanordnung zum Betreiben einer elektrischenMaschine

摘要

The invention relates to a circuit arrangement for operating an electrical machine comprising an inductive component. Said circuit arrangement contains an electric switch (TR1-TR6), which supplies the electrical machine with a pulse-type signal (S1-S4). The free-wheeling circuit likewise contains an electric switch (TR1-TR6). The circuit arrangement is provided with a comparator (15), which compares the free-wheeling current that flows in the free-wheeling circuit with a predefined threshold value and provides a switching signal (S3A) if the threshold value has not been attained, said signal being used to disconnect the switch (TR1-TR6) in the free-wheeling circuit. The inventive circuit arrangement thus reduces both the electric power loss in said arrangement and the mechanical power loss in the electrical machine.