METHOD FOR OPERATING A BRUSHLESS DC MACHINE AND DC MACHINE

摘要

The invention relates to a method for operating a brushless DC machine comprising at least one winding strand (3) to which a switching bridge (1) with at least two semi-conductor switches (4-7), respectively comprising a recovery diode which is connected in parallel, is associated. According to the invention, the semi-conductor switches (4-7) are controlled in a first operational area for forming an active free-wheeling circuit (16) and in a second operational area for forming a passive free-wheeling circuit (17). The invention also relates to a DC machine.