The impact of peak-and-hold and reverse current solenoid driving strategies on the dynamic performance of commercial cartridge valves in a digital pump/motor

Breidi, Farid; Helmus, Tyler; Lumkes, John

doi:10.1080/14399776.2015.1120138

Cited by 14 publications

(9 citation statements)

References 7 publications

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“…Repeatability with electrical actuators are also potential problems, as research at Purdue University demonstrated that variance in valve response times negatively impacts the overall efficiency. Various works have focused on mitigating these delays using peak-and-hold and reverse currents strategies and data-driven modeling for real time valve delay estimation [20,21]. To reduce the losses caused by variations in valve responses and the need for electrical power and sensors, a mechanically actuated digital inline pump was designed to control the on/off valve actuation and enable the partial flow diverting digital pump operating strategy.…”

Section: Mechanical Actuation Techniquesmentioning

confidence: 99%

Design and Sensitivity Analysis of Mechanically Actuated Digital Radial Piston Pumps

Pate,

Marschand,

Breidi

et al. 2024

Processes

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One major challenge in fluid power is the improvement and optimization of the efficiency of mobile hydraulic systems. Conventional fluid power systems often exhibit relatively low overall efficiencies caused by inefficiencies in the various components, such as a prime mover, variable displacement pump, valves, fittings, hoses, and actuators. While each component contributes to the losses in the overall system, the pump converts the mechanical shaft energy from the prime mover to energy transmitted hydraulically and is one of the most crucial components impacting overall system efficiency. Using on/off technologies, new pump architectures have enabled the opportunity to increase the efficiency over conventional designs using positive sealing valves in place of conventional port plate designs. This work proposes, investigates, and assesses the development and optimization of a digital variable displacement pump using a novel cam actuation technique on radial piston pumps. The novelty of this work is the development and parameter optimization of a mechanically actuated digital radial piston pump that can achieve high efficiencies from minimum to maximum displacement compared to common conventional variable displacement pump technologies. In this study, a sensitivity analysis is conducted to study the parameters of the system to optimize the pump. The parameters assessed in this study include: the valve bore size, cam transition and compression angles, piston diameter, and dead volume in the pumping chamber. The simulation results show that after optimizing the parameters of the system, the pump in design could reach a maximum efficiency of approximately 93% and was capable of upholding efficiencies above 80% between 30–100% displacement.

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Section: Mechanical Actuation Techniquesmentioning

confidence: 99%

Design and Sensitivity Analysis of Mechanically Actuated Digital Radial Piston Pumps

Pate,

Marschand,

Breidi

et al. 2024

Processes

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“…The principles of Digital Displacement ® have also been investigated in academia. At Purdue University, there has been much work on different control strategies [14,40,55]. At Aalborg University, the focus has been on valve design for large Digital Displacement ® machines for wind turbines [9,58,73], as well as on control [63] and tribological design aspects [42].…”

Section: Individual Element Controlmentioning

confidence: 99%

Classification and Review of Variable Displacement Fluid Power Pumps and Motors

Kärnell

Ericson

2023

TJFP

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Displacement control of positive displacement machines has been a part of fluid power since the early days. Some of the early hydraulic presses already used two different displacement settings, though this was realised by using two different pumps rather than changing the displacement. Later, radial motors with variable stroke length appeared, followed by other designs of variable machines, such as swashplate machines, bent-axis machines, and variable vane machines. All these solutions control the displacement by varying the volume difference of the displacement element – but there are other ways of achieving this. Most have not passed the research state, but some are commercially available. In this paper, different ways of varying the displacement are presented and classified. The classification divides concepts into either control of displaced fluid or control of usage of displaced fluid. In turn, these concepts can be either on system level or displacement element level. This results in four main classes, which to some extent can describe the characteristics of the control.

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“…This valve in Fig. 8 showcases a swift opening time of 3 milliseconds and a closing time of 2 milliseconds, while its working pressure threshold reaches a maximum of 20 MPa, offering a versatile ow rate range spanning from 2 to 9 liters per minute [71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87][88][89][90].…”

Section: High Speed Switching Electronic Hydraulic Valvementioning

confidence: 99%

An Overview of Unveiling the Essence of Digital Hydraulic Technology: A Comprehensive Exploration and Classification

Ali,

Jan,

Kedzia

et al. 2023

Preprint

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The advent of digital hydraulic technology has heralded noteworthy advancements across a spectrum of domains, encompassing aspects such as intelligence augmentation, seamless integration, and the imperative curtailment of energy consumption, among other facets. Over the course of several decades, the continued investment in research and development has culminated in a substantial surge of interest and attention in the industrial and scientific communities. However, the varying interpretations and elucidations of digital fluid technology put forth by diverse researchers throughout the years have yielded a conspicuous absence of a universally endorsed and accepted definition. This definitional diversity has, to a certain extent, engendered ramifications on the trajectory of its evolution. Consequently, the present paper undertakes the task of furnishing a precise and comprehensive explication of digital hydraulic technology. In doing so, we deliberate upon several salient facets, including an in-depth exploration of digital hydraulic technology, a systematic classification thereof, an exhaustive examination of digital hydraulic valves, and a comprehensive analysis of digital hydraulic pumps.

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The impact of peak-and-hold and reverse current solenoid driving strategies on the dynamic performance of commercial cartridge valves in a digital pump/motor

Cited by 14 publications

References 7 publications

Design and Sensitivity Analysis of Mechanically Actuated Digital Radial Piston Pumps

Design and Sensitivity Analysis of Mechanically Actuated Digital Radial Piston Pumps

Classification and Review of Variable Displacement Fluid Power Pumps and Motors

An Overview of Unveiling the Essence of Digital Hydraulic Technology: A Comprehensive Exploration and Classification

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