Patent ID: 6495986
Filing Date: 2002-12-17
Classification: H02H,H02P

Abstract:
A drive controller for a three-phase motor comprising an inverter having electrical valves, said inverter comprising a first and a second system for generating a first set and redundant second set of control signals, the first system has a setpoint speed value applied to it for generating the first set of control signals, which can be provided to the second system via a communication interface for generating the second set of control signals, wherein the setpoint frequency value in the first and/or second system can be limited and/or monitored by at least two fault detecting means for monitoring the first and second set of control signals and further wherein a subset of control signals corresponding to the first and second sets of control signals are compared with one another in a first fault detector and a subset of control signals to be the corresponding remaining control signals of the first and second sets of control signals are compared with one another in a second fault detector, and wherein the electrical valves of the inverter can be switched off in a two-channel mode by the respective fault detectors in the event of a deviation in the compared sets of control signals.