Abstract
Structure integration has drawn much attention in mechatronic design. This paper presents a compact component which combines the functions of an axial piston hydrostatic motor and a permanent magnet electric generator together. The integrated machine is realized by mounting a Halbach permanent magnet array which has self-shielding magnetic property on the surface of the motor's barrel, and then direct energy conversion between hydrostatic and electrical is sustained through the torque balance acting on the compound rotor. Tradeoff design is carried out for significant parameters based on the utilization of some standard parts. A prototype is fabricated and tested under no-load and loaded conditions. The results show that the prototype has small volume and moment of inertia, reasonable efficiency, as well as good generation quality and output voltage stiffness, which verifies the effectiveness of the proposed structure and design methodology.
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