| 摘要 |
The combining of two technically contrasting functions of "safe stopping" and "braking by armature short-circuiting" is served by using two means for pulse inhibition to block the respective current valves in the event of a fault by interrupting respective supply voltages for driving the control valves of the upper bridge arm and those of the lower bridge arm. For the purpose of braking by armature short-circuiting, the stator winding of a three-phase AC motor is short circuited in the event of a fault, or else operationally, by virtue of the fact that all current valves of a bridge arm can be switched on, a voltage being provided for switching on these current valves via a logic unit when the respective supply voltage for driving the current valves of this bridge arm are interrupted by the means for pulse inhibition.
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