Four-quadrant composite recycling and regenerating integrated winch driving system

According to the four-quadrant composite recycling and regenerating integrated winch driving system, the advantages of electric driving and hydraulic driving are integrated, cooperative active control over the rotating speed and the torque of the motor and passive control over the energy accumulator-variable hydraulic pump motor are utilized, and the stability of the system is improved. And integration of electric power generation-variable hydraulic pump motor multi-quadrant coordination control and energy combined type recovery and regeneration is realized. The high energy density of the electric energy storage unit and the good control characteristic of the motor are exerted, and a solution is provided for the problems of secondary gliding of the load and limited energy recovery of the energy accumulator; the closed type hydraulic system which the energy accumulator-variable hydraulic pump motor belongs to is used for obtaining high power density and near-zero rotating speed large torque output, and the pro