Abstract: A computer-implemented method for controlling and/or monitoring an operation of a pump system. The pump system includes a pump and a motor that is connected to drive the pump. The method including the steps of: determining a plurality of cavitation indicators, wherein each cavitation indicator indicates cavitation or a likelihood of cavitation of the pump for different operating ranges, wherein each operating range is given by a combination of values of a first and a second motor characteristic.

Abstract: The invention relates to a method for controlling a sensor network (2) having sensor nodes (3) of a technical system (1). The method comprises the following steps: deactivating (S1) the sensor nodes (3) of the sensor network (2); determining (S2) an induction voltage (Ue) in a coil (4) of the sensor node (3) and/or a coil (4) of the sensor network (2), the induction voltage (Ue) being generated by a magnetic field generated by the technical system (1); comparing (S3) the determined induction voltage (Ue) with a reference voltage (UR); and activating (S4) the sensor nodes (3) depending on the comparison. The invention further relates to a sensor network (2) of a technical system (1).

Abstract: A method for monitoring a condition of a rotating element, in particular an electric machine, includes acquiring, by a first sensor, a first measured variable dependent on the rotational position of the rotatable element and outputting a rotation signal corresponding to the first measured variable, ascertaining a clock rate of the acquisition of the first measured variable via a processing unit or via a separate evaluation unit, acquiring, by a second sensor of the rotational speed acquisition unit, a second measured variable different from the first measured variable and outputting a measuring signal corresponding to the second measured variable, adjusting the clock rate of the acquisition of the second measured variable by taking into account the ascertained clock rate of the acquisition of the first measured variable, and using the rotation signal and the measuring signal adjusted to the rotation signal to monitor the condition of the rotating element.

Abstract: With a method and a device for detecting a partial discharge at a winding of an electrical machine, electromagnetic first measuring signals are detected in a partial discharge frequency range and electromagnetic second measuring signals are detected in an interference frequency range. A time window around a first measuring signal is predefined, and an identification criterion is defined for a partial discharge signal and an interference signal criterion is defined for a second measuring signal. A determination is made as to a partial discharge when a first measuring signal is detected that meets the identification criterion and when, in the time window around the first measuring signal, no second measuring signal that meets the interference signal criterion is detected. A quality of the detected partial discharge is assessed based on a characteristic value of the second measuring signal.

Abstract: The invention relates to a method for controlling a sensor network (2) having sensor nodes (3) of a technical system (1). The method comprises the following steps: deactivating (S1) the sensor nodes (3) of the sensor network (2); determining (S2) an induction voltage (Ue) in a coil (4) of the sensor node (3) and/or a coil (4) of the sensor network (2), the induction voltage (Ue) being generated by a magnetic field generated by the technical system (1); comparing (S3) the determined induction voltage (Ue) with a reference voltage (UR); and activating (S4) the sensor nodes (3) depending on the comparison. The invention further relates to a sensor network (2) of a technical system (1).

Abstract: With a method and a device for detecting a partial discharge at a winding of an electrical machine, electromagnetic first measuring signals are detected in a partial discharge frequency range and electromagnetic second measuring signals are detected in an interference frequency range. A time window around a first measuring signal is predefined, and an identification criterion is defined for a partial discharge signal and an interference signal criterion is defined for a second measuring signal. A determination is made as to a partial discharge when a first measuring signal is detected that meets the identification criterion and when, in the time window around the first measuring signal, no second measuring signal that meets the interference signal criterion is detected. A quality of the detected partial discharge is assessed based on a characteristic value of the second measuring signal.

Abstract: In a method for determining loading of a bearing supporting a rotor of an electrical machine, the rotational speed and angular acceleration of the rotor is determined, matrix elements of a matrix are assigned to respective ranges of the angular acceleration and to respective ranges of the rotational speed, when the electrical machine is operated in a respective range of the angular acceleration and the rotational speed corresponding to the respective matrix element for a predefined time unit, an elementary variable, for example a value of 1, is added to the respective matrix element, and the loading of the bearing is determined as a weighted sum of the matrix elements. Thus, the matrix forms a representation of the operating time of the bearing and of the service life over time in relation to the rotational speeds and angular accelerations. The loading can be shown on a display.

Abstract: In a method for determining loading of a bearing supporting a rotor of an electrical machine, the rotational speed and angular acceleration of the rotor is determined, matrix elements of a matrix are assigned to respective ranges of the angular acceleration and to respective ranges of the rotational speed, when the electrical machine is operated in a respective range of the angular acceleration and the rotational speed corresponding to the respective matrix element for a predefined time unit, an elementary variable, for example a value of 1, is added to the respective matrix element, and the loading of the bearing is determined as a weighted sum of the matrix elements. Thus, the matrix forms a representation of the operating time of the bearing and of the service life over time in relation to the rotational speeds and angular accelerations. The loading can be shown on a display.

Abstract: An automation system and a method for identifying and correcting connection errors of field devices that are connected to an automation system are provided. A connecting unit is used to optionally connect field device connections of an automation system with connections of a feed or measuring component of the automation system.

Abstract: An automation system and a method for identifying and correcting connection errors of field devices that are connected to an automation system are provided. A connecting unit is used to optionally connect field device connections of an automation system with connections of a feed or measuring component of the automation system.