| 摘要 |
The invention relates to a drive system and a method for operating a drive system, comprising at least one converter feeding an electric motor and a safety monitor, it being possible for an alternating current, in particular a multi-phase current, to be fed to the electric motor by means of controllable power semiconductors belonging to the power electronics of the converter, a current sensor being arranged in at least two phases of the alternating current, characterized in that the current values measured by the current sensors are also fed to control electronics belonging to the converter, which electronics, in accordance with a machine model, generate drive signals, in particular pulse width modulated drive signals, for the power semiconductors, in particular as a function of the measured current values, wherein means for determining a first model value for a physical variable are provided in the control electronics and the control electronics are connected to a safety monitor for the purpose of data exchange, in particular by means of electric lines, so that the first model value determined can be fed to the safety monitor, wherein the current values measured in a third phase are also fed to a safety monitor, which has at least one means for determining a second model value for a physical variable, and wherein the safety monitor comprises comparison means with which the first model value can be compared with the second model value. |
