| 摘要 |
The invention relates to a method for determining a first hydraulic variable (Q) of a pump assembly (1), which is operated at a predefinable rotation speed (n o), from a mechanical or electrical variable (M act , P el , n act ) by evaluating a combination of the hydraulic variable (Q) with the mechanical or electrical variable (M act , P el , n act ). In this case, an actuating variable (Mtarget, ntarget) of the pump assembly (1) is acted on by a periodic excitation signal (fA, n(t), fA, H(t)) of a specific frequency (f) in such a way that a second hydraulic variable (H, Δp) is modulated. The current value of the first hydraulic variable (Q) is then determined from the mechanical or electrical variable (M act (t),Pel(t) nact(t)) as a system response (X(t)) to the excitation signal (fA, n(t), fA, H(t)) using the combination. The invention further relates to a pump electronics system and to a pump assembly which are designed to carry out the method. |
