Method for monitoring a gearbox driven by an electric motor
AssigneeLenze SE
InventorJohannes Kuehn
Life of this patent
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Abstract
The invention relates to a method for monitoring a transmission driven by an electric motor with a motor control, in which load changes with zero crossing of the motor torque in the transmission are monitored, wherein at least one operating parameter of the electric motor and/or the motor control is measured and evaluated for monitoring the load change.
Claims12
Method for monitoring a transmission driven by an electric motor with a motor control, characterized through load changes (48, 50) with zero crossing of the motor torque in the transmission are monitored, at least one operating parameter of the electric motor and/or of the motor controller being measured and evaluated in order to monitor the load changes (48, 50).
Method according to any of the preceding claims, characterized in that the number of load cycles (48, 50) is monitored.
Method according to one of the preceding claims, characterized in that the number of load cycles (48, 50) and, in particular, the exceeding of a predetermined number of load cycles (48, 50) is detected as a critical operating state and, in particular, signaled.
Method according to one of the preceding claims, characterized in that the frequency of the load changes (48, 50) is monitored and, in particular, the exceeding of a predetermined frequency is detected and signaled as a critical operating state.
Method according to one of the preceding claims, characterized in that the gear backlash (10) is monitored and, in particular, the exceeding of a predetermined gear backlash (10) is detected and signaled as a critical operating state.
Method according to one of the preceding claims, characterized in that, for monitoring the transmission backlash (10), the time-dependent characteristic of the motor torque is evaluated as a function of the time-dependent characteristic of the motor position (16).
Method according to one of the preceding claims, characterized in that the timedependent torque gradient is monitored at the time of the zero crossing and, in particular, the exceeding of a predetermined torque gradient is detected and signaled as a critical operating state.
Method according to one of the previous claims, characterized in that at least one operating parameter is evaluated taking into account the area of a transmission element affected by a respective load change (48, 50), in particular the tooth of a gear of the transmission affected by a respective load change (48, 50).
Method according to one of the preceding claims, characterized in that the method is used within the scope of a commissioning, wherein a test operation is initially carried out within the scope of the commissioning and, if critical operating states occur during the test operation, parameters of the open-loop and/or closed-loop control of the electric motor are adjusted.
Dependencies are inferred from the claim text.