For centrifugal shielded pumps, is flow rate proportional to current?
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For centrifugal shielded pumps, is flow rate proportional to current? High flow rate corresponds to high current, while low flow rate corresponds to low current. Is it directly proportional?
Excluding mechanical losses and volumetric losses, this is the theory. But in reality, it’s not proportional; it’s only consistent in trend.
Not necessarily. First, consider the type of pump: for ordinary single-stage radial pumps, the power curve generally slopes upward; for mixed-flow pumps, it changes from an upward trend to a downward one, while axial flow pumps have a purely downward power curve. Moreover, when the power changes, the current change may not be significant! ! !
Take a look at the pump’s performance curve; power is not directly proportional to flow rate
Positive correlation, not a strict proportionality.