Patent ID: 6573681
Filing Date: 2003-06-03
Classification: H02P

Abstract:
A drive control for a three-phase AC motor via an inverter, the inverter having current valves in a bridge circuit, comprising:a first means for pulse inhibition of an upper bridge arm having a first set of current valves, and a second means for pulse inhibition of a lower bridge arm having a second set of current valves, wherein the first and second sets of current valves may be blocked upon selection or in the event of a fault by the first means for pulse inhibition and the second means for pulse inhibition; a means for braking by armature short-circuiting, with the aid of which upon selection or in the event of a fault a stator winding of a three-phase AC motor is short-circuited by switching the second set of current valves of the lower bridge arm; and means for switching the second set of current valves as the respective supply voltage for driving the current valves of lower bridge arm and/or those of the upper bridge arm are interrupted by a means for pulse inhibition.