An improved electric driven hydraulic power system

An improved electric driven hydraulic power system including a plurality of hydraulic actuators, which are first to kth hydraulic actuators (A1 to AK), the electric driven hydraulic power system comprising:

• a first motor (M1), a second motor (M2), . . . , and an nth motor (Mn), which are a plurality of motors, and a first inverter (I1), a second inverter (I2), . . . , and an nth inverter (In) connected to the motors to convert a direct current of a battery into alternating currents and to convert rotation speeds of the motors, respectively;
• a first hydraulic pump (P1), a second hydraulic pump (P2), . . . , and an nth hydraulic pump (Pn), which are a plurality of hydraulic pumps directly connected to shafts of the motors to supply a hydraulic oil introduced from a storage tank to a main control valve (MCV), respectively;
• the main control valve (MCV) including a plurality of control valves, which are first to jth control valves (V1 to Vj) provided inside the main control valve (MCV) to convert a flow path of the hydraulic oil so as to receive the hydraulic oil supplied from the first to nth hydraulic pumps (P1 to Pn) and selectively supply the hydraulic oil or block the supply of the hydraulic oil to the first to kth hydraulic actuators (A1 to Ak);
• the hydraulic actuators, which are the first to kth hydraulic actuators (A1 to AK) for receiving the hydraulic oil of the main control valve (MCV) to perform predetermined operations;
• a control unit (100) for individually controlling each of the first to nth inverters (I1 to In), each of the first to nth motors (M1 to Mn), and the control valves, which are the first to jth control valves (V1 to Vj) provided inside the main control valve (MCV);
• a storage tank (400) for supplying the hydraulic oil to the first to nth hydraulic pumps (P1 to Pn), and accommodating the hydraulic oil returned from the main control valve (MCV);
• a battery for supplying a current to the first to nth motors (M1 to Mn), the main control valve (MCV), and the control unit;
• and
• a battery management system (BMS) for controlling and managing the battery,
• wherein first to nth discharge pipes (L1 to Ln) are connected to outlets of the first to nth hydraulic pumps (P1 to Pn), respectively, the discharge pipes are integrated into one supply pipe (L100), and the supply pipe (L100) is connected to an inlet of the main control valve (MCV).