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Topics in power engineering
Related publications (144)
Towards the material limit and field concentration smoothing in multilayer dielectric elastomer actuators
Yves Perriard, Yoan René Cyrille Civet, Jonathan André Jean-Marie Chavanne, Morgan Almanza
Performance of dielectric elastomer actuators is closely related to its breakdown field. On the other hand, to enhance the available energy, multilayer configuration is needed to increase the amount of active material. However, multilayer configuration suf ...
IOP PUBLISHING LTD2020Influence of humidity, temperature and prestretch on the dielectric breakdown strength of silicone elastomer membranes for DEAs
Herbert Shea, Fabio Beco Albuquerque
Humidity, temperature and membrane prestretch influence the dielectric breakdown strength of elastomer membranes. These three factors thus also influence the maximum force and strain that dielectric elastomer actuators (DEAs) can generate, as the Maxwell p ...
IOP PUBLISHING LTD2020Drastic breakdown field reduction in multilayer DEA
Yves Perriard, Yoan René Cyrille Civet, Jonathan André Jean-Marie Chavanne, Morgan Almanza
The electrical properties such as the electrical breakdown and the permittivity but also the softness of the elastomer are key factors for the performance of DEA. In order to have the best use of elastomer films, single-layer actuators have been deeply stu ...
2019Nonlinear electrical conductivity through the thickness of multidirectional carbon fiber composites
Marcos Rubinstein, Anastasios Vassilopoulos, Xi Chen, Jie Li
Lightning strikes pose a serious natural threat to carbon fiber-reinforced poly- mers (CFRPs). Knowledge of the electrical current distribution is essential for modeling the interaction between CFRP with lightning. In most applications, the anisotropy of C ...
2019High voltage switch for compact bidirectional dc-dc converter driving dielectric electroactive polymer actuators
Yves Perriard, Yoan René Cyrille Civet, Morgan Almanza, Raphaël Johannes Charles Mottet, Lucas Pniak
Driving DEAs requires time-varying high voltage power supplies, up to 18kV for 200um polymer layers. HV amplifiers are commonly used but bulky and expensive. Designing embedded actuators requires compact and efficient powersupplies. Furthermore, only a lit ...
2019Method to Measure Area Specific Resistance and Chromium Migration Simultaneously from Solid Oxide Fuel Cell Interconnect Materials
Chromium evaporation is identified as a major degradation mechanism in solid oxide fuel cell (SOFC) stacks. The major chromium source is the commonly used stainless steel interconnects, thus raising a need for protective coatings on the interconnect steel. ...
2019Gas breakdown mitigation in satellite slip rings
Ivo Furno, Alan Howling, Fabio Avino, Paul Jeroen Laureis Martens
Direct current (DC) gas breakdown is experimentally investigated for high-voltage circular conductors and insulators that reproduce the main features of a satellite slip ring. Breakdown voltages are measured in the pressure range 10 ...
2019Design of High Permittivity Polysiloxane Elastomers for Dielectric Elastomer Transducers
Dielectric elastomer transducers consist of a dielectric elastomer between two compliant electrodes. When the elastic capacitor is electrically charged, the dielectric elastomer elongates until a balance of elastic and electrostatic force is reached. Elect ...
EPFL2019Critical Parasitic Elements of Coupled Inductors for Ultra-High Voltage Flyback Converters Used to Drive Capacitive Actuators
Yves Perriard, Alexis Boegli, Morgan Almanza, Raphaël Johannes Charles Mottet
This paper presents the critical parasitic elements of coupled inductors and their influence when designing a low input (12V) and ultra-high output voltage (>4000V) DC-DC Flyback Converter. The aim is to design a compact converter capable to supply the ult ...
IEEE2019Local Theory of the Insulating State
An insulator differs from a metal because of a different organization of the electrons in their ground state. In recent years this feature has been probed by means of a geometrical property, the quantum metric tensor, which addresses the system as a whole, ...
AMER PHYSICAL SOC2019