Publications by Xiaotao Ren | EPFL Graph Search

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Soft Magnetic Composites (SMCs) possess promising electromagnetic characteristics and attract intense research and application interest in the engineering community. Fabrication of composites with customized architecture is feasible due to the recent advan ...

Magnetic manipulation is a method used for biomedical applications to remotely control micro-robots in a contactless manner. The electromagnet manipulator should control a magnetic field with 3 degrees of freedom inside a region of interest. In various cas ...

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 ...

Electrical machines are the central components of many energy conversion systems. Developing the performance of these devices is critical for improved energy management in our society. A new generation of electrical equipment has been enabled by the recent ...

Soft Magnetic Composites (SMC) are an alternative to laminated steels for the design of smaller and lighter electromagnetic devices.Such electromagnetic devices might be subjected to significant mechanical stresses that can alter their electromagnetic prop ...

Soft Magnetic Composites (SMCs) demonstrate excellent potentials for electromagnetic applications. The isotropy is one critical feature in designing the composite. This work presents a shape optimization algorithm for SMCs subject to isotropy and volume co ...

This paper presents a semi-analytical homogenization model for Soft Magnetic Composites (SMCs), providing the effective magnetic behavior and the level of Eddy Current (EC) losses. Both linear and nonlinear magnetic behavior are considered. A magnetic circ ...

Soft Magnetic Composites (SMCs) have huge application potential in electrical devices. With the development of additive manufacturing (AM), the properties of SMCs can be boosted. It is therefore required an optimization algorithm to design SMCs considering ...

This work studies the level-set based topology optimization for the optimal layout of winding in electric motor. The functional to optimize is to maximize the torque in the air-gap. The coil domain is initiated by a level set function. The time evolutionar ...

A homogenization approach for the solution of multiscale eddy current problem is proposed. The method is based on the subspace decomposition and it involves a coarse space and a nested fine space. The homogenized problem is posed in the coarse space with t ...

Coreless electric motors are gaining interest from the community as they have a larger power-to-weight ratio and a larger efficiency. The absence of iron slots leaves the winding space unobstructed. This enables the geometry of the coils to be skewed to ov ...

Topology optimization is increasingly used to automate design processes and explore innovative geometries. This study extends this method to motor windings, focusing on coreless electrical machines that allow greater design freedom by eliminating restricti ...

This work presents the electromagnetic design of a 3D-printed winding for a coreless linear motor. The key geometric parameters are optimized with motor constant as the objective. The optimization is applied to two types of coil layouts. An increase of the ...

Touch is commonly used to mediate human-machine interactions, notably in the setting of Digital Musical Instruments (DMIs), where touch screens are prevalent. The lack of rich haptic feedback has an impact on the richness and quality of the interaction. Pi ...

Devices fabricated from Soft Magnetic Composites (SMCs) are gaining popularity in research and application. The multiscale characteristics require special attention. Solving the quasi-statics Maxwell’s equations on such devices consumes huge time and memor ...

Magnetorheological fluid is a type of smart material whose viscosity changes quickly when exposed to an external magnetic field. This paper focuses on the optimized design of a miniature magnetorheological valve integrated into a novel smart shoe-sole that ...

Xiaotao Ren

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Shape Optimization of Soft Magnetic Composites using Level-set Method

Topology Optimization of an Electromagnet Manipulator for 3D Uniform Magnetic Field

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

Enhanced Electric Motors using Multi-Functional 3D Printed Winding with Integrated Heat Sinks

Topology Optimization of an Electromagnet Manipulator for 3D Uniform Magnetic Field Generation

A Homogenization Model for Soft Magnetic Composites Considering the Effect of Mechanical Stress

Level-set-based Shape Optimization on Soft Magnetic Composites with Isotropy Constraint

Effective properties and eddy current losses of soft magnetic composites

Topology Optimization of Soft Magnetic Composites with Integer Programming

Topology Optimization for Coils of Electric Machine with Level-set Method

Homogenization of Multiscale Eddy Current Problem by Localized Orthogonal Decomposition Method

2.5D Topology Optimization to Design Overlapping Winding in Multi-Phase Coreless Electrical Machine

Topology Optimization of Motor Windings for Coreless Electrical Machines

Improved properties of soft magnetic composites with hollow microstructures

Innovative Design of 3D-printed Winding for Linear Motor

Reinforcement Learning and Hardware in the Loop for Localized Vibrotactile Feedback in Haptic Surfaces

LOD-Homogenization of Multiscale Eddy Current Problem in Time Domain

Density-Based Topology Optimization of Conductor Paths for Windings in Slotted Electrical Machines

Optimal Design of Magnetorheological Valve Integrated in an Intelligent Footwear for Diabetic Patients with Foot Insensitivity