| 摘要 |
<p>The present invention relates to a control device (1) for pressure control in a hydraulic system (100), especially of an elevator-system (200), the control device (1) is adapted to control an output variable (f, I, U) of an inverter (20) supplying a hydraulic pump (102) of the hydraulic system (100) with electric energy, the output variable (f, I, U) is adapted to adjust the speed (S) of the hydraulic pump (102) in order to at least partly compensate for a leakage of operating fluid (300) in the hydraulic pump (102). Further, the invention relates to an elevator-system comprising a hydraulic pump (102), an inverter (20), and a control device (1) which controls a supply of the hydraulic pump (102) with electric energy from the inverter (20). Moreover, the invention relates to a method for pressure control in a hydraulic system (100), especially of an elevator-system (200), the method comprising the steps of supplying a hydraulic pump (102) of the hydraulic system (100) with electric energy from an inverter (20), controlling at least one output variable (f, I, U) of the inverter (20) for adjusting the speed of the hydraulic pump (102), in order to at least partly compensate for a leakage of operating fluid in the hydraulic pump (102). For providing an inexpensive elevating solution with good right quality for hydraulic elevators, the present invention provides that the control device (1) comprises a computing module (6) which is adapted to determine the output variable (f, I, U) based on at least one inverter parameter (Tx).</p> |
