Therefore, the proposed method combines better energy efficiency, stability, and economic performance, which will be expected to provide a good reference for the development of electro-hydraulic systems.ĭC buses and microgrids have drawn significant attention due to the ease of integration of distinct sources and energy storage systems. The results suggest that the peak torque is lower than pure electric vehicles, and the energy utilization is improved substantially with the battery consumption reduced by 20.86%. Moreover, the actual driving conditions are analyzed utilizing actual data acquisition and simulation. The results illustrate that the phenomenon of torque surge can be reduced under the appropriate proportion, and the battery energy consumption rate is reduced by 33.54% compared to pure electric vehicles. Simultaneously, the article determines the optimal ratio by multiple optimization objectives with SOC as the constraint. Compared with the AMESim certified cycle, the results indicate that the MEHPC system can significantly reduce electric peak torque and improve the battery's state of charge (SOC) after the proportional distribution. A distribution method for the electro-hydraulic ratio under different working modes is proposed taking the electric peak torque as the optimal target. This paper proposes a novel MEHPC electric vehicle, which integrates the traditional motor with the hydraulic pump/motor to realize the mutual conversion of electrical energy, mechanical energy, and hydraulic energy. The engagement and distribution ratio of electric and hydraulic power will certainly affect the stability and efficiency of the mechatronic-electro-hydraulic power coupling (MEHPC) system. Management method was approximately 10% higher in the low and medium wave conditions. Compared with other control methods, the improvement of energy generation efficiency of the proposed control Simulation results showed that by applying the proposed strategy, the generated energy increased during the working Proposed system, a simulation model was built in AMESim software based on the previous experiment test bench configuration. Resistance load to maintain them working in the highest performance area under variable wave conditions. A control management strategy was designed to adjust the tilt angle of the hydraulic motor and the generator Regenerated power and energy efficiency by using a suitable configuration of a variable displacement hydraulic motor andĪ generator. This paper presents a novel control strategy for HPTO to enhance the The energy recovery efficiency of the whole system. Hydraulic power-take-off (HPTO) is a key technology of wave energy converters which determines Wave energy is known to be a promising energy source for the goal of environmental protection and reducing dependence Flux weakening based electric machine design allows sizing for maximum achievable power and helps not only to downsize the electric machine by 30% but also to save on the cost of the power electronics required. The EM design with flux weakening mode of operation are compared to the ones with max torque per amp mode of operation in terms of mass, torque density, and efficiency. Based on a given work cycle and a reference hydraulic unit, a multi-objective genetic algorithm based design optimization is used to optimize the electric machine of the integrated EHU for the best efficiency and compactness. Such a flux weakening mode of operation can allow optimal sizing of the EHUs if the peak flow and pressure demands do not coincide. A flux weakening mode current control strategy extends the operating speeds of the electric machine to its maximum power by injecting a negative d-axis current. This paper discusses the optimal design of such an integrated EHU with a radial flux permanent magnet synchronous machine with flux weakening operation for a swashplate type axial piston machine. Owing to inherent differences in the power densities of the two machines, efforts are required to make more compact electric machines in order to reduce the overall size of the resulting EHU. Such units capable of multi-quadrant operation are commonly known as electrohydraulic units (EHUs). With the recent electrification trends affecting mobile hydraulics, there is a rising demand for the development of energy-efficient and compact hydraulic supply units driven by electric machines.
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