Step-response simulation of energy regulation based electrohydraulic variable-speed drive

The electrohydraulic variable-speed drive(VSD) can achieve a high energy efficiency as volume drive. But its main disadvantages, which are slow response and poor low-speed performance, limit its development. The energy regulation based electrohydraulic VSD is a good solution to solve these problems by adding an energy regulation device and a main-circuit throttling valve into the conventional electrohydraulic VSD system. The step-response simulations, which include several load types, are carried out. The simulation results have showed that the energy regulation drive can not only achieve a good energy-saving performance, but also gain a fast step-response.