Method for controlling the hydraulic pump flow following an imposed frequency law for AC motors

The efficiency improvements of the hydraulic systems could be accomplish by integrating the electronics and computer engineering. The hydraulic power is the most suitable for control techniques implying real-time correlation between the pressure and flow. The paper presents the way we have controlled the hydraulic power by varying the pump flow as direct proportion to its AC motor frequencies. We have written the specialized software for controlling the frequency following an imposed law. By using the Texas Instrument and Arduino devices, we have controlled the AC motor speed with an inverter, so that the experimental set up for the entire electro-hydraulic system approved the useful and expected results for the external gear pump.