Electromagnetic field analysis and research of electrohydraulic pump based on finite element method

In this paper, according to the structural features and operating principles of PM brushless DC motor and axial plunger-type hydraulic pump, a new hydraulic energy system, named electrohydraulic pump, is proposed based on traditional canned motor pump. The integrating principle and structure are analyzed, and then, the electromagnetic field numerical calculation and analysis of the electrohydraulic pump are conducted with MagNet under both no-load and load conditions. The simulation results verify the feasibility of proposed integrated design. The magnetic field in the system has no distortion and local saturation, and the dynamic performances satisfy the technical requirements. The simulation results, we believe, provide some theoretical basis and serve as some guidance for the integrated design and performance optimization of the hydraulic energy system.