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Device for controlling plant, has control unit determining reference value for rotational speed of electric motor, where pressure values and/or volumetric flow values for supply of hydraulic circuits are compared with rotational speeds
Device for controlling plant, has control unit determining reference value for rotational speed of electric motor, where pressure values and/or volumetric flow values for supply of hydraulic circuits are compared with rotational speeds
The device (1) has hydraulic pumps connected in series to a drive shaft (4) of an electric motor (5). One of the hydraulic pumps is provided as a guidance pump (31), which cooperates with a guidance control unit (6). The control unit determines a reference value (ns) for rotational speed of the electric motor. Time-variable rotational speed for the electric motor is calculated in the control unit. Different pressure values and/or volumetric flow values for supply of hydraulic circuits are compared with the calculated rotational speeds and considered.
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