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• W4313461196 startingPage "106515" @default.
• W4313461196 abstract "Abstract Hydraulic presses (HPs) are often preferred in metal processing for their high load capacity. Unfortunately, they are also known for their high energy consumption and low energy efficiency. The mismatch between installed and demanded power is the primary cause of low energy efficiency among HPs. To cope with this problem, this paper proposes an energy-recovery method based on a flywheel energy storage system (FESS) to reduce the installed power and improve the energy efficiency of HPs. In the proposed method, the FESS is used to store redundant energy when the demanded power is less than the installed power. During pressing with slow falling, the stored energy is recycled in combination with an AC motor to work against the heavy load, thereby reducing the motor power burden. Furthermore, unlike traditional FESS, a variable frequency drive scheme and specific control scheme are employed to ensure the load characteristics of the motor and improve the energy storage density of the FESS. As different shapes of flywheels have different moments of inertia and energy storage efficiency, this study also examined the energy density of the FESS under different shapes and obtained the best fit shape for the hydraulic power unit. Finally, a test platform is set up to verify the effectiveness of the proposed hydraulic drive system. Results show that the installed power is reduced by approximately 41.9 % and the energy consumption is reduced by 53 %, compared to the traditional HP." @default.
• W4313461196 created "2023-01-06" @default.
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• W4313461196 date "2023-03-01" @default.
• W4313461196 modified "2023-10-16" @default.
• W4313461196 title "Strategies to improve the energy efficiency of hydraulic power unit with flywheel energy storage system" @default.
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• W4313461196 doi "https://doi.org/10.1016/j.est.2022.106515" @default.
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