Transportable pump system for hydraulic tools

摘要

The system (120) has a single-level hydraulic pump (112) guiding a fluid for driving a hydraulic tool, and an electrically driven motor (111) e.g. synchronous motor, connected with the pump for driving the pump. A power electronic is attached to the motor. The power electronic comprises a power controller (105) such that a limit of allowed maximum current required by the system is provided and/or a limit of allowed minimum voltage required by the system is provided. The electronic adjusts a motor power such that a speed of the motor is reduced till non-exceedance of a limit value.