Christian Köchli

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Publications associées (25)

Preliminary Study of Pressure Self-Sensing Miniature Magnetorheological Valves

Yves Perriard, Yoan René Cyrille Civet, Christian Köchli, 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 i ...

IEEE2021

Design and Manufacturing of an Electrostatic MEMS Relay for High Power Applications

Yves Perriard, Yoan René Cyrille Civet, Christian Köchli, Florian Louis Copt

This paper addresses the design and manufacturing of a crab-leg based MEMS relay for a high power application. Thanks to a contact resistance lower than 100 mΩ, the relay can hold a current in the order of magnitude of an Ampere without further thermal lim ...

2021

Geometrically Balanced Metal Detector Based on Optimized Frequencies and Spatial Phase Profile Responses to Discriminate Different Metal Rods Features

Yves Perriard, Christian Köchli, Chafic Abu Antoun

Inductive detection with double-balanced coils and a spatial phase profile were used to identify copper and steel rods in a composite target. The electromagnetic detection system was designed and validated using a dipole model. Simulations and experiments ...

Ieee-Inst Electrical Electronics Engineers Inc2017

Validation by Measurements of a Windage Losses Model for Very-High-Speed Machines

Yves Perriard, Christian Köchli, Douglas Martins Araujo, Guillaume Paul-André Burnand

When designing a very-high-speed (VHS) machine, it is crucial to evaluate the windage losses accurately, because they are an important part of the total losses. It is therefore important to validate a reliable model, further used for the design and optimiz ...

2017

Dynamic Winding Reconfiguration of a Brushless DC Motor

Yves Perriard, Christian Köchli, Douglas Martins Araujo, Florian Louis Copt

2017

Electrostatically actuated MEMs relay for high power applications

Yves Perriard, Christian Köchli, Florian Louis Copt

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 ...

2016

Smart self-calibrated metal detector, simulated, designed, verified, and used to discriminate single and multiple materials

Yves Perriard, Christian Köchli, Chafic Abu Antoun

2016

Validity Tests of Superposition Principle Based on Forward Model for Electromagnetic Induction Scattering

Yves Perriard, Christian Köchli, Chafic Abu Antoun

Low-frequency electromagnetic scattering from conductive and permeable bodies is the main principle of detection devices. To be able to classify the objects in the base material, a fast forward model based on the dipolar approximation was developed and ver ...

Ieee-Inst Electrical Electronics Engineers Inc2015

Minimizing the circulating currents of a slotless BLDC motor through winding reconfiguration

Yves Perriard, Christian Köchli, Florian Louis Copt

2015

Frequency Analysis of Finite Steel Cylinders and their Comparison to Complex Cylinder-like Targets using an Electromagnetic Induction Sensor

Yves Perriard, Christian Köchli, Chafic Abu Antoun

This paper shows that the standard industrial targets that need to be detected using an electromagnetic induction sensor cannot be represented by their exact size definition in international standards. Reinforcing steel with defined 16mm diameter according ...

IEEE2015

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Geometrically Balanced Metal Detector Based on Optimized Frequencies and Spatial Phase Profile Responses to Discriminate Different Metal Rods Features

Yves Perriard, Christian Köchli, Chafic Abu Antoun

Ieee-Inst Electrical Electronics Engineers Inc2017

Smart self-calibrated metal detector, simulated, designed, verified, and used to discriminate single and multiple materials

Yves Perriard, Christian Köchli, Chafic Abu Antoun

2016

Frequency Analysis of Finite Steel Cylinders and their Comparison to Complex Cylinder-like Targets using an Electromagnetic Induction Sensor

Yves Perriard, Christian Köchli, Chafic Abu Antoun

IEEE2015