Energy Efficiency of Displacement Control Drive Systems in Hydraulic Forming Presses

2019 ◽  
Vol 141 (4) ◽  
Author(s):  
Christer Schenke ◽  
Jürgen Weber
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Deep Drawing ◽  
Control Methods ◽  
Displacement Control ◽  
Valve Drive ◽  
Displacement Pump ◽  
Variable Displacement ◽  
Drive Systems ◽  
Two Alternatives

Hydraulic deep drawing presses are manifold machines that can be used for a number of use cases. The general need for the reduction of the energy consumption of industrial machines forces press manufacturers and owners to optimize their machines and processes. This article presents methods for the analysis and optimization of the drive systems of a hydraulic deep drawing press with four-point die cushion. For the slide drive, two alternatives of control methods for speed variable displacement pumps are compared to the conventionally used displacement pump with a constant speed. For the drive of the die cushion, two displacement control drive systems are compared to a conventional valve drive system.

Quadratic Programming to Optimize Energy Efficiency of Speed- and Displacement-Variable Pumps

2014 ◽  
Author(s):  
Johannes Willkomm ◽  
Matthias Wahler ◽  
Jürgen Weber
Keyword(s):  
Energy Efficiency ◽  
Energy Savings ◽  
Control Strategies ◽  
Quadratic Optimization Problem ◽  
Optimum Energy ◽  
Displacement Pump ◽  
Control Concept ◽  
Drive Speed ◽  
Variable Displacement ◽  
Dynamic Loss

Within the last years, speed-variable pump drives were investigated in numerous applications. In combination with a variable displacement pump, the volume flow and the drive speed can be decoupled. In this paper the resulting degree of freedom will be used to minimize the energy consumption of hydraulic processes by means of a novel model predictive control concept. A dynamic loss model of all drive components will be transformed to a mathematical quadratic optimization problem. The optimum use of the two control variables can achieve energy savings of up to 25% in comparison to known control strategies of speed-variable variable-displacement pumps. Especially in highly dynamic process cycles the proposed optimization guarantees optimum energy efficiency while known approaches become inefficient.

Improving the Energy Efficiency of a Hydraulic Press Via Variable-Speed Variable-Displacement Pump Unit

2018 ◽  
Vol 140 (11) ◽  
Author(s):  
Haihong Huang ◽  
Rui Jin ◽  
Lei Li ◽  
Zhifeng Liu
Keyword(s):  
Energy Efficiency ◽  
Hydraulic Press ◽  
Variable Speed ◽  
Pump Unit ◽  
Forming Process ◽  
Drive Unit ◽  
Rotating Speed ◽  
Displacement Pump ◽  
Variable Displacement ◽  
Load Conditions

Hydraulic presses are widely applied in various forming processes to manufacture products with complex shapes, however, they are energy-intensive. In order to lower the energy consumption, a variable-speed variable-displacement pump unit (SVVDP) was developed for hydraulic presses, where the flow rate required by the press in a forming process can be realized by changing the motor rotating speed and the pump displacement simultaneously. A theoretical model was built to reveal the energy dissipation behavior of the drive unit, which shows that the energy efficiency of the drive unit can be optimized by varying the rotating speed of the motor under a variety of load conditions. An experimental platform with a SVVDP was established to find the optimum rotating speed and the corresponding displacement in different load conditions, and experimental results verified the improved energy efficiency of the SVVDP compared with that of the commonly used single variable drive unit. By employing the strategy that the determined optimum rotating speeds in different load conditions were preset as recommended values for the drive unit working in different operations, the proposed drive unit was applied to a press completing a forming process and the results indicate significant energy saving potentials.

Experimental Studies of a Novel Alternating Flow (AF) Hydraulic Pump

2017 ◽  
Author(s):  
Ryan J. Foss ◽  
Mengtang Li ◽  
Eric J. Barth ◽  
Kim A. Stelson ◽  
James D. Van de Ven
Keyword(s):  
Phase Angle ◽  
Experimental Studies ◽  
Companion Paper ◽  
Pump Efficiency ◽  
Operating Pressure ◽  
Displacement Control ◽  
Displacement Pump ◽  
Pressure Dynamics ◽  
Variable Displacement ◽  
Control Circuits

The ideal variable displacement pump for a displacement control circuit is efficient across a wide operating range and readily mounted on a common shaft with multiple pumps. This paper presents a novel variable displacement pump architecture for displacement control circuits that uses the concept of alternating flow (AF) between piston pairs that share a common cylinder. The displacement is adjusted by varying the phase angle between the piston pairs. When the pistons are in phase, the pump displacement is at a maximum and when the pairs of pistons are out of phase, fluid is shuttled between the pistons and the pump produces no net flow. A prototype of the AF pump was constructed from two inline triplex pumps that were modified so that three piston pairs were created. The crankshafts of the two pumps were connected via a sprocket-and-chain transmission. The sprockets allow for accurate measurement of the phase angle, which is adjusted, in this early phase prototype, by disassembling the chain and shifting the sprockets. The prototype AF pump was then mounted to the test stand and experiments were conducted to map the AF pump efficiency and cylinder pressure dynamics across a range of operating pressure, speed, and displacement. The AF pump’s efficiency was measured for 8 diferent phase angles with an efficiency of near 90% at full flow and 65% at 36% displacement. The experimental results were compared to simulation results, presented in a companion paper at this conference.

A Hydraulic Circuit for Single Rod Cylinders

2011 ◽  
Vol 134 (1) ◽  
Author(s):  
Longke Wang ◽  
Wayne J. Book ◽  
James D. Huggins
Keyword(s):  
Energy Efficiency ◽  
High Energy ◽  
Stability Control ◽  
Control Algorithms ◽  
Hydraulic Circuit ◽  
Internal Instability ◽  
Displacement Pump ◽  
Variable Displacement ◽  
High Energy Efficiency ◽  
Working Region

This paper proposes a novel hydraulic circuit for a single rod cylinder controlled by a variable displacement pump. The circuit arrangement not only gives the system high energy efficiency but also improves upon the internal instability of traditional circuits. Stability is illustrated by comparing traditional circuits with the proposed circuit. The motivations, derivations, and proofs of the system dynamical stabilities are presented. Control algorithms including stability control and sliding to the desired working region are presented. Experiments are conducted to verify the circuit, and results show that the circuit has good performance.

scholarly journals Energy Efficiency Analysis of Copper Ore Ball Mill Drive Systems

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1786
Author(s):  
Piotr Bortnowski ◽  
Lech Gładysiewicz ◽  
Robert Król ◽  
Maksymilian Ozdoba
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Permanent Magnets ◽  
Average Energy ◽  
Energy Performance ◽  
Ball Mills ◽  
Copper Ore ◽  
Mass Unit ◽  
Fluid Coupling ◽  
Drive Systems

Milling is among the most energy-consuming technological stages of copper ore processing. It is performed in mills, which are machines of high rotational masses. The start of a mill filled to capacity requires appropriate solutions that mitigate the overloading. One method for increasing the energy efficiency of ball mills is to optimize their drive systems. This article looks at two variants of drive systems with efficiencies higher than the already existing solutions. The first variant is a low-speed synchronous motor with permanent magnets without a gearbox, and the second variant is an asynchronous high-efficiency motor with a gearbox and a fluid coupling. The energy performance analysis of the three solutions was based on the average energy consumption indicator per mass unit of the milled material and on the energy consumption per hour. The investigations required models of the drive systems and analyses with the use of the Monte Carlo methods. The highest energy efficiency is observed in the case of the solution based on the permanent magnet motor. However, the drive system with the high-speed motor offers a gentle start-up possibility owing to the fluid coupling.

Improving Energy Efficiency in Internet of Things using Artificial Bee Colony Algorithm

2020 ◽  
Vol 14 ◽  
Author(s):  
M. Sivaram ◽  
V. Porkodi ◽  
Amin Salih Mohammed ◽  
S. Anbu Karuppusamy
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Artificial Bee Colony ◽  
Trust Model ◽  
Sensor Nodes ◽  
Remote Areas ◽  
Bee Colony ◽  
Important Concern ◽  
Wide Range ◽  
Iot Devices

Background: With the advent of IoT, the deployment of batteries with a limited lifetime in remote areas is a major concern. In certain conditions, the network lifetime gets restricted due to limited battery constraints. Subsequently, the collaborative approaches for key facilities help to reduce the constraint demands of the current security protocols. Aim: This work covers and combines a wide range of concepts linked by IoT based on security and energy efficiency. Specifically, this study examines the WSN energy efficiency problem in IoT and security for the management of threats in IoT through collaborative approaches and finally outlines the future. The concept of energy-efficient key protocols which clearly cover heterogeneous IoT communications among peers with different resources has been developed. Because of the low capacity of sensor nodes, energy efficiency in WSNs has been an important concern. Methods: Hence, in this paper, we present an algorithm for Artificial Bee Colony (ABC) which reviews security and energy consumption to discuss their constraints in the IoT scenarios. Results: The results of a detailed experimental assessment are analyzed in terms of communication cost, energy consumption and security, which prove the relevance of a proposed ABC approach and a key establishment. Conclusion: The validation of DTLS-ABC consists of designing an inter-node cooperation trust model for the creation of a trusted community of elements that are mutually supportive. Initial attempts to design the key methods for management are appropriate individual IoT devices. This gives the system designers, an option that considers the question of scalability.

The Research of Measuring Approach and Energy Efficiency for Hadoop Periodic Jobs

2015 ◽  
Vol 8 (1) ◽  
pp. 206-210 ◽  
Author(s):  
Yu Junyang ◽  
Hu Zhigang ◽  
Han Yuanyuan
Keyword(s):  
Energy Efficiency ◽  
Cloud Computing ◽  
Energy Consumption ◽  
Energy Saving ◽  
Energy Estimate ◽  
Cloud Platform ◽  
Periodic Tasks ◽  
Current Consumption ◽  
Reduce Energy Consumption

Current consumption of cloud computing has attracted more and more attention of scholars. The research on Hadoop as a cloud platform and its energy consumption has also received considerable attention from scholars. This paper presents a method to measure the energy consumption of jobs that run on Hadoop, and this method is used to measure the effectiveness of the implementation of periodic tasks on the platform of Hadoop. Combining with the current mainstream of energy estimate formula to conduct further analysis, this paper has reached a conclusion as how to reduce energy consumption of Hadoop by adjusting the split size or using appropriate size of workers (servers). Finally, experiments show the effectiveness of these methods as being energy-saving strategies and verify the feasibility of the methods for the measurement of periodic tasks at the same time.

Pre- and post-operam comparison of the energy consumption of a radio base station under energy efficiency actions

2021 ◽  
Vol 236 ◽  
pp. 110772
Author(s):  
Carmela Vetromile ◽  
Antonio Spagnuolo ◽  
Antonio Petraglia ◽  
Antonio Masiello ◽  
Maria Rosa di Cicco ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Base Station
Sign in / Sign up

Export Citation Format

Share Document