Variable-load Simulation of Energy Regulation Based Variable-speed Electrohydraulic Drive System

The variable-speed electrohydraulic drive, which can achieve similar energy efficiency as volume drive system, has some excellent features. But the main disadvantages, which are slow response and poor low-speed performance, limit its development. The energy regulation based variable-speed electrohydraulic drive is a good solution to solve these problems by adding an energy regulation device and a main-circuit throttling valve into the system. The variable-load simulation, which includes step disturbance, fast time-varying small-changes load, slow time-varying&big-changes load and square-load are carried out. The simulation results have showed that the energy regulation system can not only achieve the goal of excellent anti-interference feature, but also keep the good energy-saving performance.