Parameter Analysis of Electromagnetic Braking Using Fully Nested and Two Way ANOVA

2014 ◽  
Vol 663 ◽  
pp. 193-197 ◽  
Author(s):  
Mohamad Zairi Baharom ◽  
M.Z. Nuawi ◽  
Gigih Priyandoko
Keyword(s):  
Statistical Analysis ◽  
Eddy Current ◽  
Parametric Study ◽  
Air Gap ◽  
Parameter Analysis ◽  
Braking Performance ◽  
Braking System ◽  
Study Results ◽  
Nested Anova ◽  
Significant Factors

This paper presents the statistical analysis that was used to define optimized parameter for the electromagnetic braking using eddy current study. It illustrates parametric study on four different parameters affecting the braking performance using eddy current which are air-gap, number of electromagnet turns, current induced and disc thickness. These four parameters are defined as the factors which contribute to the reduction of RPM speed as the effect. Fully nested ANOVA was used as the first analysis to determine two most significant factors to eddy current braking system. Then, two-way ANOVA was applied to clarify the most significant factors to be used as the controllable parameters in the verification study. Results from both ANOVA test shows that current induced and air-gap are the two most significant factors that affected braking using eddy current.

scholarly journals Design of eddy current brake for electric motorcycle braking system

2021 ◽  
Vol 12 (1) ◽  
pp. 41
Author(s):  
Mufti Reza Aulia Putra ◽  
Muhammad Nizam ◽  
Dominicus Danardono Dwi Prija Tjahjana
Keyword(s):  
Magnetic Field ◽  
Finite Element ◽  
Eddy Current ◽  
Eddy Currents ◽  
Motor Vehicles ◽  
Braking Performance ◽  
Braking System ◽  
Fem Method ◽  
The Magnetic Field ◽  
Aluminum Disk

Braking systems in motor vehicles generally use a braking system that utilizes friction. The braking performance will decrease caused by using friction rapidly. To overcome this, as an alternative, an electromagnetic braking system can be used by utilizing eddy currents, such as eddy current brakes (ECB). Eddy currents are generated when the rotor pass the magnetic field of the electromagnet. The research aim is to design an ECB system. The performance of the disk design will be determined in this study. The study is about the tendency of the ECB properties. The finite element (FEM) method is used by modeling ECB performance. The experimental results were used to validate the result. The test showed the results of braking using aluminum disk showed the best performance in 12.03 Nm. From these results, the combination of the disks is needed by an appropriate disk design.

scholarly journals Mini review on the design of axial type eddy current braking technology

2019 ◽  
Vol 10 (4) ◽  
pp. 2198 ◽  
Author(s):  
H.T. Waloyo ◽  
Ubaidillah Ubaidillah ◽  
D.D.D.P. Tjahjana ◽  
M. Nizam ◽  
T. Koga
Keyword(s):  
Magnetic Field ◽  
Performance Improvement ◽  
Eddy Current ◽  
Braking Performance ◽  
Braking System ◽  
Single Disk ◽  
Electric Braking ◽  
Potential Issue

Eddy Current Brake (ECB) is a type of electric braking that uses eddy current to produce braking forces. This article delivers a solid review of the design of Axial ECB, which is very promising for an alternative braking system. Several types of axial ECB are classified and named as a single disk, double disk, and unipolar model. The classification of axial ECB is based on the design of coil placement, which induces axial area of the disk as well as the electromagnet source. A potential issue for the development of axial ECB is also discussed to explore the braking performance improvement of the axial type ECB. It was highlighted that research on how to change the direction of magnetic field vectors by changing the shape of the pole-shoe on the electromagnetic ECB in axial type has not been widely studied. Therefore, this issue would be interesting for future investigation.

Air-Gap Effect on Single Axis Vibration of Electromagnetic Braking Using Eddy Current on Bearing Cage

2014 ◽  
Vol 663 ◽  
pp. 400-405
Author(s):  
Mohamad Zairi Baharom ◽  
Mohd Zaki Nuawi ◽  
Mohammad Syuhaimi Ab-Rahman ◽  
Gigih Priyandoko ◽  
Che Ku Eddy Nizwan ◽  
...  
Keyword(s):  
Eddy Current ◽  
Repulsive Force ◽  
Air Gap ◽  
Gap Effect ◽  
Brake Disc ◽  
Current Experiment ◽  
Test Rig ◽  
Braking System ◽  
Braking Torque ◽  
Structure Test

An electromagnetic braking system using eddy current experiment was conducted to study the behaviour of the system in terms of vibration. Brake disc used which is Al6061 has a displacement in z-axis direction which occurred because of the repulsive force generated on both sides of the disc as drag force from electromagnetic braking. This study aims to analyze the vibration behaviour when braking occurred in different initial speeds of DC motor and different air-gap cases. Smaller air-gap will produce high braking torque due to the increasing of magnetic field density. The higher the force generated, the vibration of the disc may illustrates different behaviour of the vibration in the structure. Test rig was developed using sensor of accelerometer and data acquisition of NI-DAQ with the use of Dasylab for the measurement and instrumentation purposes. Findings shows that the electromagnetic braking force generated in smaller air-gap between electromagnetic poles and rotating conductive disc during the braking using eddy current has damped the vibration occur in the structure of bearing cage.

Modeling and optimization of tubular linear permanent magnet eddy current brake with Halbach array

2020 ◽  
pp. 1-23
Author(s):  
Jiahao Li ◽  
Guolai Yang ◽  
Yumeng Fan
Keyword(s):  
Electromagnetic Field ◽  
Permanent Magnet ◽  
Eddy Current ◽  
Analytical Method ◽  
Structural Parameters ◽  
Parameter Analysis ◽  
Design Parameters ◽  
Braking Performance ◽  
Halbach Array ◽  
Braking Force

This paper provides an analytical method for calculating the electromagnetic field of the tubular linear permanent magnet eddy current brake. The method of separating variables based on Fourier series is used to solve the boundary value problem, and the analytical solution of electromagnetic field is obtained. The braking force is obtained by calculating the Lorentz force. Then the accuracy of the analytical method is verified by comparing the analytical solutions with the solutions obtained by finite element method (FEM). In order to improve braking performance in a limited space, the parameter analysis is carried out to investigate the influence of various structural parameters on the braking characteristics. According to the results of parameter analysis, the range of design parameters is determined. Finally, a multi-objective optimization is applied to find the optimal design parameters of the eddy current brake. The braking force increases by 27% and the volume of permanent magnet decreases by 7.7% after optimization.

EBD Control Research on Nonuniformity Roads for Electric Vehicles on Energy Regenerative and Feedback Friction Integrated Braking

2012 ◽  
Vol 602-604 ◽  
pp. 1775-1781
Author(s):  
Guo Ye Wang ◽  
Lu Zhang ◽  
Feng Zhu Yu ◽  
Zhong Fu Zhang
Keyword(s):  
Electric Vehicles ◽  
Control Strategy ◽  
Simulation System ◽  
Integrated System ◽  
Regenerative Braking ◽  
Braking Performance ◽  
Braking System ◽  
Study Results ◽  
Control Research ◽  
Set Up

The energy regenerative and feedback friction integrated braking system for electric vehicles is projected, and the integrated system dynamic model is set up. Offer the EBD control strategy on nonuniformity roads based on ABS system. Based on the Matlab/Simulink, establish the dynamic simulation system of integrated braking system and EBD control for the electric vehicles; Based on the Chery A3 car, simulate and analyze the integrated braking system EBD control performances on the condition of driving straight on nonuniformity roads. The study results indicate that the energy regenerative and feedback friction integrated braking system for electric vehicles has good EBD performance, and has high regenerative braking efficiency, braking performance and braking stability.

scholarly journals Car braking effectiveness after adaptation for drivers with motor dysfunctions

2021 ◽  
Vol 11 (1) ◽  
pp. 617-623
Author(s):  
Adam Sowiński ◽  
Tomasz Szczepański ◽  
Grzegorz Koralewski
Keyword(s):  
Efficiency Index ◽  
Mathematical Function ◽  
Test Results ◽  
Braking Performance ◽  
Braking System ◽  
System Adaptation ◽  
Parametric Description ◽  
Limited Power ◽  
Braking Force ◽  
Selection Of

Abstract This article presents the results of measurements of the braking efficiency of vehicles adapted to be operated by drivers with motor dysfunctions. In such cars, the braking system is extended with an adaptive device that allows braking with the upper limb. This device applies pressure to the original brake in the car. The braking force and thus its efficiency depend on the mechanical ratio in the adapting device. In addition, braking performance depends on the sensitivity of the car’s original braking system and the maximum force that a disabled person can exert on the handbrake lever. Such a person may have limited power in the upper limbs. The force exerted by the driver can also be influenced by the position of the driver’s seat in relation to the handbrake lever. This article describes the research aimed at understanding the influence of the above-mentioned factors on the car braking performance. As a part of the analysis of the test results, a mathematical function was proposed that allows a parametric description of the braking efficiency index on the basis of data on the braking system, adaptation device, driver’s motor limitations, and the position of the driver’s seat. The information presented in this article can be used for the preliminary selection of adaptive devices to the needs of a given driver with a disability and to the vehicle construction.

scholarly journals Three-Axis Inductive Displacement Sensor Using Phase-Sensitive Digital Signal Processing for Industrial Magnetic Bearing Applications

Actuators ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 115
Author(s):  
Teemu Sillanpää ◽  
Alexander Smirnov ◽  
Pekko Jaatinen ◽  
Jouni Vuojolainen ◽  
Niko Nevaranta ◽  
...  
Keyword(s):  
Signal Processing ◽  
Digital Signal Processing ◽  
Eddy Current ◽  
High Speed ◽  
Digital Signal ◽  
Magnetic Bearing ◽  
Air Gap ◽  
Sensor Design ◽  
Quadrature Demodulation ◽  
Displacement Sensors

Non-contact rotor position sensors are an essential part of control systems in magnetically suspended high-speed drives. In typical active magnetic bearing (AMB) levitated high-speed machine applications, the displacement of the rotor in the mechanical air gap is measured with commercially available eddy current-based displacement sensors. The aim of this paper is to propose a robust and compact three-dimensional position sensor that can measure the rotor displacement of an AMB system in both the radial and axial directions. The paper presents a sensor design utilizing only a single unified sensor stator and a single shared rotor mounted target piece surface to achieve the measurement of all three measurement axes. The sensor uses an inductive measuring principle to sense the air gap between the sensor stator and rotor piece, which makes it robust to surface variations of the sensing target. Combined with the sensor design, a state of the art fully digital signal processing chain utilizing synchronous in-phase and quadrature demodulation is presented. The feasibility of the proposed sensor design is verified in a closed-loop control application utilizing a 350-kW, 15,000-r/min high-speed industrial induction machine with magnetic bearing suspension. The inductive sensor provides an alternative solution to commercial eddy current displacement sensors. It meets the application requirements and has a robust construction utilizing conventional electrical steel lamination stacks and copper winding.

scholarly journals An Alternative Method for Calculating the Eddy Current Loss in the Sleeve of a Sealless Pump

Actuators ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 78
Author(s):  
Tomislav Strinić ◽  
Bianca Wex ◽  
Gerald Jungmayr ◽  
Thomas Stallinger ◽  
Jörg Frevert ◽  
...  
Keyword(s):  
Eddy Current ◽  
Three Dimensional ◽  
Eddy Current Loss ◽  
Theoretical Background ◽  
Air Gap ◽  
Magnetic Flux Density ◽  
Pump Impeller ◽  
Current Loss ◽  
Faraday’S Law ◽  
Transient Simulations

A sealless pump, also known as a wet rotor pump or a canned pump, requires a stationary sleeve in the air gap to protect the stator from a medium that flows around the rotor and the pump impeller. Since the sleeve is typically made from a non-magnetic electrically conductive material, the time-varying magnetic flux density in the air gap creates an eddy current loss in the sleeve. Precise assessment of this loss is crucial for the design of the pump. This paper presents a method for calculating the eddy current loss in such sleeves by using only a two-dimensional (2D) finite element method (FEM) solver. The basic idea is to use the similar structure of Ampère’s circuital law and Faraday’s law of induction to solve eddy current problems with a magnetostatic solver. The theoretical background behind the proposed method is explained and applied to the sleeve of a sealless pump. Finally, the results obtained by a 2D FEM approach are verified by three-dimensional FEM transient simulations.

Forensic and pharmaceutical analysis of addictive morbidity because of the use of psychoactive substances in Ukraine

2020 ◽  
Vol 15 (16) ◽  
pp. 128-132
Author(s):  
V. V. Shapovalov ◽  
◽  
A. A. Gudzenko ◽  
V. A. Shapovalova ◽  
V. V. Shapovalov ◽  
...  
Keyword(s):  
Information Security ◽  
Dynamic System ◽  
Public Administration ◽  
Classical Model ◽  
Security Management ◽  
The State ◽  
State Management ◽  
Study Results ◽  
Factors Of Influence ◽  
Significant Factors

Introduction. Modern turbulent state of society actualizes need for scientifically based methods and technological solutions to improve the information security system not only for the state, but also for society and the person in particular. Objective. To highlight the significant factors of information security of social development and to study the role of public admini-stration in the context of the actualization of information threats and risks. Study results. The article considers the essence of state management approaches to information security based on interpretation in terms of risk management. Information security is presented as a dynamic system that needs balance. Balance can be disturbed by external and internal factors. The 8 most significant factors that need to be taken into account to develop effective models of public administration in the field of information security are identified. 4 paradigms of information security management (systemic, synergetic, phenomenological and cognitive) which can be involved are considered. However, they are not universal and separate in any particular case, that is they are systemic in nature, and security management should be based on their integrated application depending on the situation and the specifics of the management process. Based on the analysis of the classical model of maintaining the state balance of a dynamic system, it is concluded that it can be used to ensure information security. A model is proposed to explain the reasons for the imbalance of the dynamic system of information security under the action of factors of influence and the risks that accompany them, and to determine the measures of public administration to ensure it. Conclusion. The model is proposed to explain the reasons for the imbalance of the dynamic system of information security under the action of factors of influence and the risks that accompany them, and to determine the measures of public administration to ensure it. Key words: Information security; Information security factors; Society; Public administration; Information security model.

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