The method of the hydraulic pressure supply device and the hydraulic actuator apparatus using the same

The present invention has high responsiveness, a hydraulic supply device capable of handling a variety of mother machine size. The hydraulic pressure supply device, variable speed electric motor (11) and the hydraulic pump unit of each comprising a plurality based on the pump unit (12) (10); to the discharge port of the pump units (13), the hydraulic oil in both directions, respectively actuation of communicated directly as tolerated without inhibiting the passage leads to the load side and joins the flow of the hydraulic fluid discharged from each of the pump unit (12), or come back from the load side in the opposite direction hydraulic fluid passages for directing the flow of oil diverted to the pump units (12) (21); and an electric motor (11) control for synchronously controlling the rotational speed from each other in the hydraulic pump unit (10) comprising means (14, 15).