Minh Trung Duöng | EPFL Graph Search

Minh Trung DUONG was born in Vietnam in 1991. He obtained the Bachelor degree in Electrical Engineering from Hanoi University of Science, and Technology in 2014 and the Ph.D degree in 2019 from Korea Electrotechnology Research Institute. He is currently working at the Laboratory of Integrated Actuators. His research interests include design and analysis of electrical machine and actuators, and energy harvesting from various sources.

Exploring Beyond the Helmholtz Coils for Uniform Magnetic Field Generation with Topology Optimization

Yves Perriard, Adrien Jean-Michel Thabuis, Xiaotao Ren, Minh Trung Duöng

Uniform magnetic fields are desired in a wide range of applications. The most known device achieving such a purpose is the pair of Helmholtz coils. It consists of two identical circular coils, with their main axis aligned and placed at a distance equal to their common radius from each other. The goal of this research is to find another arrangement of the coils in space so as to achieve the largest region possible with a uniform magnetic field. A topology optimization framework is developed for this purpose. It investigates the ideal distribution of current densities in an axisymmetric 2D domain. The designed topology provides a significant improvement of the volume with a uniform field, which is 6.37 times larger than the reference one obtained with Helmholtz coils.

2022

Preliminary Study of Pressure Self-Sensing Miniature Magnetorheological Valves

Yves Perriard, Yoan René Cyrille Civet, Sofia Lydia Ntella, Kenny Jeanmonod, Minh Trung Duöng

Magnetorheological (MR) valves have been included in many innovative engineering systems, such as dampers, clutches, or brakes, with different fields of application. Their role serves actuation purposes, while integrated displacement and velocity sensing in the actuators has been studied, as well. In this paper, we present the working principle, design, and preliminary results of a miniature MR valve with pressure self-sensing capabilities that exploits the electromagnetic induction phenomenon. The valve can work in a pressure range from 200 kPa to 700 kPa, supplied by a current of a maximum 0.3 A. The suggested valve design is realized with two coils, one for the current application and the magnetic field creation and one for the sensing of the electromagnetic induction. A specially designed test-bench, that facilitates MR fluid flow and pressure regulation, was used for the experimental procedures.

IEEE2021

Force Reduction in a Short-Stroke Vibration Tubular Generator for Vehicle Energy Harvesting Application

Minh Trung Duöng

This paper examines methods to reduce the detent force and electromagnetic force in a short-stroke vibration tubular generator used to harvest energy from a vehicle suspension system but still achieve the design targets of power and power density. A well-known skewing permanent magnet approach and a novel approach named the unbalanced model (or moving teeth arrangement) were considered. A multi-objective optimization-based response surface method was also investigated. The results from 2D and 3D finite element analyses (FEA) revealed that when the permanent magnet array in the proposed machine was skewed by 45°, the detent force decreased by 13.1%. When parts of the slot were shifted by the same angle (45°), the unbalanced model could even reduce detent force by 32.7%. However, output power and power density also decreased accordingly. Among these approaches, multi-objective optimization, which can find the trade-off between various physical responses, seemed to be the best solution. A prototype based on an optimal design was fabricated, tested and its behavior was in excellent agreement with the FEA.

2020