From hydraulic demand to motor operating points
Pressure and flow determine the pump's mechanical power requirement, but the motor must also cover acceleration, pressure peaks and losses in the complete system. The pump displacement and efficiency are therefore assessed together with motor speed, torque and the intended control strategy.
| Input | Engineering relevance |
|---|---|
| Maximum pressure and flow | Define the highest continuous or short-term shaft demand. |
| Pump displacement and efficiency | Convert the hydraulic operating point into motor torque and power. |
| Duty and cycle time | Determine permissible thermal utilisation and cooling. |
| Battery or DC-bus range | Defines current demand across minimum and maximum voltage. |
| Coupling and mounting | Control alignment, bearing load and mechanical compatibility. |
Variable-speed pump operation
Where the process permits it, adapting pump speed to actual flow demand can avoid throttling losses and reduce heat input into the oil. The benefit depends on the complete operating map: very low motor speed may reduce self-cooling, while short pressure peaks can demand substantial current reserve.
For a quick assessment: send the hydraulic diagram, pump data sheet, pressure/flow operating points, supply range, cycle description and available dimensions.