Publications by Yves Perriard | EPFL Graph Search

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Shape Memory Alloys (SMAs) are a type of smart materials that reacts mechanically to heat. Due to their complex behavior, they are often used in a simple geometry such as wires. This constrains the output displacement of the alloy to a simple linear contra ...

This review presents a detailed survey of Dielectric Elastomer Actuators (DEAs) and their emerging role in medical applications. DEAs are distinguished by their flexibility, low weight, and excellent biocompatibility, making them well-suited for a wide ran ...

The paper presents the development of a very high speed (200 krpm, 2 kW) slotless permanent magnet motor, using an analytical model. The multiphysics analytical model allows a quick optimization process. The presented model includes the magnetic fields, th ...

This paper focuses on the maximization of the torque-to-weight ratio of permanent magnet synchronous motors (PMSM) using a topology optimization method. It aims at finding the optimal design that either maximizes the torque for a given weight or minimizes the weight for a required torque. The analysis presented in this paper besides considers radial and tangential permanent magnets. The paper shows that the optimization always leads to the same optimal motor topology, which is scaled to achieve the required

In the scope of haptic touch feedback actuators, we discuss the phenomenon of creating the haptic experience by squeezing the air film between the user finger and the actuator. The focus is given in the modeling of the squeeze film effect. An existing anal ...

To design actuators or motors requires analyzing a lot of parameters such as length, temperature, efficiency, weight, etc. To obtain the optimum results for given specifications the solution is to analyze globally all the free parameters in one go, with an optimization algorithm based on the "Prodesign" software which includes an optimization module developed by INPG in Grenoble (France). A comparison between the parametrical study and the finite element design is made with two different examples. The first

The Ironless Inductive Position Sensor can be the ideal candidate for linear position sensing in harsh environment and in presence of external magnetic fields. Starting from the validated electromagnetic characteristics, this paper presents a model of ther ...

Small scale ultrasonic piezoelectric actuators performance strongly depends on not well-known contact dynamics. Deep Neural Network (DNN) sees their use in physic simulation growing as their flexibility allows better performance especially when dynamics la ...

Lumped parameter model and mock circulation loop are two tools commonly used in biomedical research to simulate cardiac system in order to study different assist devices. In this paper, a lumped parameter model is proposed to simulate a circulation loop. T ...

The paper presents a new type of electronically-switched doubly-salient permanent-magnet (DSPM) small motor for household appliances. Its basic structure is similar to that of a switched reluctance motor, except for the presence of high-energy PMs inside the rotor poles. Electromagnetic torque is thereby developed in much the same way as in PM brushless DC motors but with an important cogging torque component required for holding the rotor stationary when the power supply is switched off. A prototype of the

This paper aims to present an optimization method for very-high-speed electrical machines based on multiphysical analytical models. Analytical models allow a fast design but have to be robust and reliable. The set of models presented is very complete and c ...

In the analysis of squeeze film haptic tactile feedback actuators, attention is focused on establishing an empirical model of the force generated on the user's finger. The model is based on finite-element simulations which take into account the real motion ...

The ironless inductive position sensor is a novel linear position-sensing device that should exhibit immunity to external magnetic fields while simultaneously guaranteeing high-precision measurements in harsh environments. This paper focuses on the charact ...

This paper introduces a promising technique for detecting the rotor position of a PM motor at standstill. The technique is based on the B-H hysteresis characteristics of the stator iron. Depending on the rotor position, a very particular phenomenon related to B-H hysteresis appears. This phenomenon permits to detect the electrical position of a non-salient rotor.

In order to develop the new generation of motor pump (water) for heating or for cooling applications, a structural motor study was made to determine the best motor corresponding to the specifications. Stator structures, winding, supplying mode, pole number, etc. are the parameters of this study. To analyse them, several software packages were developed in order to design each solution as best as possible. This paper first describes the differences between the choice of the motor based on the phase number an

In this paper, a MEMs relay for high power application is investigated. This relay has to hold a current of the order of magnitude of the Ampere and is subject to harsh environment such as high temperature or vibrations which can lead to a premature dysfun ...

This paper presents a method to optimize two linear actuator configurations. The method is stochastic and combines a genetic algorithm (GA) and FEM (finite element method) model generated with the commercial software FEMM. The optimization is performed in ...

An injection deviee for injecting injection material, comprising: an elastic deformable element (3) able to exert a pushing force on a piston (20) of a syringe (2) so as to eject a quantity of injection material out of the syringe (2); a stopper ( 4) for r ...

With brushless DC Motor (BLDC), current regulators in dq axes are very appreciated for sinusoidal supply. As the set current is constant, the regulator works properly. When the back-EMF is not sinusoidal, current oscillations appear in the dq regulator. A new method is proposed to avoid the regulator oscillations in case of a non-sinusoidal back-EMF.

The paper presents a method to determine hysteresis losses in synchronous permanent magnet (PM) motors. The method comprises four steps: (1) experimental determination of the B-H loop, (2) analytical modeling of the B-H loop by applying different models, (3) analytical modeling of the hysteresis losses, and (4) determination of the hysteresis losses in a synchronous PM motor, and results' verification using an experiment and an FEM software. © 2006 IEEE.

Yves Perriard

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Designing compliant mechanisms composed of shape memory alloy and actuated by induction heating

The elastic frontier: dielectric elastomer actuators in healthcare technology

A 200 000 rpm, 2 kW Slotless Permanent Magnet Motor

Torque-to-weight Ratio Maximization in PMSM Using Topology Optimization

Modeling of the air film pressure for a haptic touch actuator

High series motor or actuator design-finite element model versus analytical model

Modelling and compensation of thermal effects on an Ironless Inductive Position Sensor

Normal Contact Force Estimation Using Deep Learning

Energy Analysis of a Cardiac Assist Device based on Dielectric Elastomer Actuator through an Equivalent Electrical Circuit

Analysis and design of a doubly-salient permanent-magnet small motor with electronic commutation

Very-High-Speed Miniaturized Permanent Magnet Motors: Design and Optimization

Empirical Modeling of a Squeeze Film Haptic Actuator

Characterization of Magnetic Immunity of an Ironless Inductive Position Sensor

Exploitation of a new iron B-H phenomenon for the standstill position detection of PM motors

Motor comparison for circulation pumps

Electrostatically actuated MEMs relay for high power applications

Optimization design of a linear actuator using a genetic algorithm

Injection Device

BLDC motor control in multiple dq axes

Analysis of hysteresis losses in synchronous permanent magnet motors