scholarly journals Optimal Magnetic Spring for Compliant Actuation – Validated Torque Density Benchmark

Actuators ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 18 ◽  
Author(s):  
Branimir Mrak ◽  
Bert Lenaerts ◽  
Walter Driesen ◽  
Wim Desmet
Keyword(s):  
Industrial Applications ◽  
Design Environment ◽  
Pareto Optima ◽  
Component Level ◽  
Synchronous Motors ◽  
Torque Density ◽  
Magnetic Spring ◽  
Multi Objective Genetic Algorithm ◽  
Physical Prototype ◽  
Industrial Solutions

Magnetic springs are a fatigue-free alternative to mechanical springs that could enablecompliant actuation concepts in highly dynamic industrial applications. The goals of this article are:(1) to develop and validate a methodology for the optimal design of a magnetic spring and (2) tobenchmark the magnetic springs at the component level against conventional solutions, namely,mechanical springs and highly dynamic servo motors. We present an extensive exploration of themagnetic spring design space both with respect to topology and geometry sizing, using a 2D finiteelement magnetostatics software combined with a multi-objective genetic algorithm, as a part of aMagOpt design environment. The resulting Pareto-optima are used for benchmarking rotationalmagnetic springs back-to-back with classical industrial solutions. The design methodology has beenextensively validated using a combination of one physical prototype and multiple virtual designs.The findings show that magnetic springs possess an energy density 50% higher than that of stateof-the-art reported mechanical springs for the gigacycle regime and accordingly a torque densitysignificantly higher than that of state-of-the-practice permanently magnetic synchronous motors.

scholarly journals A Comprehensive Review of Winding Short Circuit Fault and Irreversible Demagnetization Fault Detection in PM Type Machines

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3309 ◽  
Author(s):  
Zia Ullah ◽  
Jin Hur
Keyword(s):  
Fault Diagnosis ◽  
Early Stage ◽  
Short Circuit ◽  
Industrial Applications ◽  
Operational Environment ◽  
Compact Structure ◽  
Torque Density ◽  
Prime Concern ◽  
Attractive Option ◽  
The Impact

Contemporary research has shown impetus in the diagnostics of permanent magnet (PM) type machines. The manufacturers are now more interested in building diagnostics features in the control algorithms of machines to make them more salable and reliable. A compact structure, exclusive high-power density, high torque density, and efficiency make the PM machine an attractive option to use in industrial applications. The impact of a harsh operational environment most often leads to faults in PM machines. The diagnosis and nipping of such faults at an early stage have appeared as the prime concern of manufacturers and end users. This paper reviews the recent advances in fault diagnosis techniques of the two most frequently occurring faults, namely inter-turn short fault (ITSF) and irreversible demagnetization fault (IDF). ITSF is associated with a short circuit in stator winding turns in the same phase of the machine, while IDF is associated with the weakening strength of the PM in the rotor. A detailed literature review of different categories of fault indexes and their strengths and weaknesses is presented. The research trends in the fault diagnosis and the shortcomings of available literature are discussed. Moreover, potential research directions and techniques applicable for possible solutions are also extensively suggested.

scholarly journals Design of A Novel Line Start Synchronous Motor Rotor

Electronics ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 25 ◽  
Author(s):  
Berkan Zöhra ◽  
Mehmet Akar ◽  
Mustafa Eker
Keyword(s):  
Finite Elements ◽  
Permanent Magnets ◽  
High Efficiency ◽  
Asynchronous Motor ◽  
Industrial Applications ◽  
Permanent Magnet Synchronous Motors ◽  
Synchronous Motors ◽  
Motor Efficiency ◽  
Motor Design ◽  
And Performance

Line start permanent magnet synchronous motors (LS-PMSM) are preferred more and more in industrial applications, because they can start on their own and because of their high efficiency. In this study, a new LS-PMSM rotor typology is suggested, which is modelled using surface mount permanent magnets, in which two different slot types have been used together. The rotor of an asynchronous motor on the industrial market in the IE2 efficiency segment has been remodeled in the study, resulting in an increase in motor efficiency from 85% to 91.8%. A finite elements software was used for determining motor design and performance, in addition to analytical methods.

Benchmarking CD-Adapco’s Star-CCM+ in a Production Design Environment

2010 ◽  
Author(s):  
Mikhail M. Grigoriev ◽  
Chester V. Swiatek ◽  
James A. Hitt
Keyword(s):  
Industrial Applications ◽  
Design Tool ◽  
Cfd Analysis ◽  
Aerodynamic Design ◽  
Design Environment ◽  
Delivery Times ◽  
Level 3 ◽  
Stage Performance ◽  
Design Integration ◽  
Level 2

It has been well-known that many industrial applications that use centrifugal compressors have continuously demanded for more and more efficient machines in the past decade or so. However, the current market trend indicates that there is a strong demand among the end users for reduced delivery times of these efficient compressors. This, in turn, requires that the aerodynamic design of highly efficient centrifugal stages be completed within shorter time frames. In order to meet these challenges, it is mandatory to involve modern computational analysis tools such as Computational Fluid Dynamics (CFD) as a routine design tool for the aerodynamic engineer. This presentation discusses a hierological structure for CFD analysis along with an overview of limitations and benefits for each classification within this structure. Usage and results pertaining to the implementation of this structure at Cameron’s Compression System will also be covered. Accordingly, a discussion of aerodynamic design practices (both current and historical) will be offered. It should be obvious to the reader that the goal of design integration would require the primary focus to be towards validation of the commercial CFD code. Results presented were obtained using the StarCCM + CFD package developed by CD-Adapco. As mentioned earlier, CFD analysis can be described as a hierological structure consisting of 4 levels. At level 1, the analysis component consists of an impeller coupled with a vaneless diffuser region under a steady state flow condition. On level 2, the model involves an impeller and low solidity diffuser row analysis using a mixing plane interface. Level 3 facilitates the consideration of entire impeller and an entire diffuser with a full set of diffuser blades within a transient framework. These levels (1 through 3) include the assumption of a dump collector and imply a circumferential periodicity at the exit. Also, models for level 2 and level 3 incorporate the use of a 1-d modeling to predict overall stage performance. Level 4, the most sophisticated model, involves a full-stage analysis of an unsteady turbulent flow through the entire centrifugal stage, all the way from impeller inlet to the discharge of the scroll/volute/collector. At this level, the overall stage performance is predicted directly from the CFD analyses. The paper compares the results of each level of analyses with the test data and discusses the potential benefits as well as limitations of each level of analyses.

scholarly journals Design and Preliminary Testing of a Magnetic Spring as an Energy-Storing System for Reduced Power Consumption of a Humanoid Arm

Actuators ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 136
Author(s):  
Jhon F. Rodríguez-León ◽  
Ilse Cervantes ◽  
Eduardo Castillo-Castañeda ◽  
Giuseppe Carbone ◽  
Daniele Cafolla
Keyword(s):  
Energy Consumption ◽  
Mechanical Energy ◽  
High Hardness ◽  
Preliminary Test ◽  
Industrial Applications ◽  
Energy Prices ◽  
Magnetic Spring ◽  
Spring System ◽  
Reduced Power Consumption ◽  
Humanoid Arm

The increasing use of robots in the industry, the growing energy prices, and higher environmental awareness have driven research to find new solutions for reducing energy consumption. In additional, in most robotic tasks, energy is used to overcome the forces of gravity, but in a few industrial applications, the force of gravity is used as a source of energy. For this reason, the use of magnetic springs with actuators may reduce the energy consumption of robots performing trajectories due their high-hardness magnetic properties of energy storage. Accordingly, this paper proposes a magnetic spring configuration as an energy-storing system for a two DoF humanoid arm. Thus, an integration of the magnetic spring system in the robot is described. A control strategy is proposed to enable autonomous use. In this paper, the proposed device is modeled and analyzed with simulations as: mechanical energy consumption and kinetic energy rotational and multibody dynamics. Furthermore, a prototype was manufactured and validated experimentally. A preliminary test to check the interaction between the magnetic spring system with the mechanism and the trajectory performance was carried out. Finally, an energy consumption comparison with and without the magnetic spring is also presented.

scholarly journals Multi parametric model predictive control based on laguerre model for permanent magnet linear synchronous motors

2019 ◽  
Vol 9 (2) ◽  
pp. 1067
Author(s):  
Nguyen Hong Quang ◽  
Nguyen Phung Quang ◽  
Dao Phuong Nam ◽  
Nguyen Thanh Binh
Keyword(s):  
Permanent Magnet ◽  
Predictive Control ◽  
Nonlinear Damping ◽  
Industrial Applications ◽  
Input Constraints ◽  
Synchronous Motors ◽  
Linear Motors ◽  
Rotary Motors ◽  
Mechanical Durability ◽  
Linear Synchronous Motors

<p>The permanent magnet linear motors are widely used in various industrial applications due to its advantages in comparisons with rotary motors such as mechanical durability and directly creating linear motions without gears or belts. The main difficulties of its control design are that the control performances include the tracking of position and velocity as well as guarantee limitations of the voltage control and its variation. In this work, a cascade control strategy including an inner and an outer loop is applied to synchronous linear motor. Particularly, an offline MPC controller based on MPP method and Laguerre model was proposed for inner loop and the outer controller was designed with the aid of nonlinear damping method. The numerical simulation was implemented to validate performance of the proposed controller under voltage input constraints.</p>

Evaluation of Different Hybrid Material Systems and Systematic Analysis of their Physical Mechanisms in Terms of Fatigue

2015 ◽  
Vol 825-826 ◽  
pp. 473-481 ◽  
Author(s):  
David Hummelberger ◽  
Luise Kärger ◽  
Frank Henning
Keyword(s):  
Automotive Industry ◽  
Hybrid Material ◽  
High Strength ◽  
Industrial Applications ◽  
Efficient Design ◽  
Component Level ◽  
Systematic Analysis ◽  
Physical Mechanisms ◽  
Hybrid Solutions ◽  
Material Systems

Hybrid material systems are designed by the specific combination of different materials. As a result, expanded property profiles can be achieved, which would not be possible with monolithic material solutions. For lightweight, high strength and high rigidity, complex shaped structural components, which are used in the automotive industry and in aerospace, hybrid material systems offer an outstanding potential. A comprehensive understanding regarding the interaction of the individual components of the hybrid material is of great importance for a more efficient design of future structures. In this work, existing hybrid solutions for industrial applications and those, which are subject of current research, are analyzed and categorized first. Intrinsic and extrinsic material combinations are considered at different levels, ranging from hybrid laminates on shell level to complex hybrid structures on component level. Based on the situation analysis, different hybrid solutions are evaluated and compared considering the requirements of the automotive industry. Furthermore, the associated physical mechanisms which are responsible for the respective property profile are considered and explained systematically. The long-term objective of the work is to establish a methodology to derive the necessary physical mechanisms and, based on that, to derive optimal hybrid solutions for desired property profiles.

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