A HYSTROSTATIC-DRIVEN electric generator is an energy conversion device which can be employed to convert hydrostatic energy to electrical form directly in hydrostatic transmission systems. In recent years, there has been an increasing use of this machine in the process of seeking solutions to the energy crisis. Its applications can be mainly categorized into two types, which are energy recovery and renewable energy exploitation, respectively.The basic principle of energy recovery is to drive an electric generator with pressurized fluid which is useless in the original hydrostatic system. A typical application is mobile machinery equipped with lifting booms. When the booms are lowered,