RVactuators
RVactuators, s.r.o. is a research and development company based in Czech Republic that specializes in manufacturing and customisation of Smart MicroActuators based on Shape Memory Effect in Heusler MicroWires suitable for use by the space, aviation, robotics, healthcare and wearables.[1]
These state-of-the-art materials deliver remarkable reversible strain, superior mechanical properties, and consistent performance through repeated use–all while being cost-efficient to manufacture.
RVactuators is a sister company of RVmagnetics[2] active in passive contactless MicroWire Sensors.[3]
History
The company was founded in 2024[4] by Rastislav Varga, former Member of the General Council at the European Magnetism Association [5] and Member of the Technical Committee of IEEE Magnetics Society [6] and Member of European Physical Society (EPS) [7]
Services
Scope of their work basically lays in prototyping and customisation of the Heusler MicroWires to meet the requirements of their customers. The main focus of the company is on MicroWire actuating technologies that can be used where Size, Weight and Power (SwaP design principle) is of essence.
Contracts
RVactuators has been awarded Early Technology Development contract in November 2025 by ESA (European Space Agency).
Company has also applied for grant DEEP TECH,[8] provided under The Operational Program Technologies and Application for Competitiveness (OP TAC) under Managing authority of Ministry of Industry and Trade of Czech Republic.[9]
Shape Memory Actuation Technology
Shape memory actuation refers to the use of materials capable of reversible deformation in response to external stimuli, such as temperature changes or electric current. These materials are employed in various precision-movement applications, where their ability to undergo controlled shape changes enables simplified system architectures and increased operational reliability.
Glass-coated microwires with different valence electron concentrations (e/a) have been investigated for their potential to exhibit structural transformations within a temperature range of 100 K to 400 K.[10]
Magnetic properties of such microwires can be tuned through external magnetic excitation. In particular, the variation of magnetic permeability has been demonstrated to reach up to 1600% [11] when an appropriately selected amplitude of excitation magnetic field is applied.
NiFeGa microwires represent another class of materials relevant to shape memory actuation. These microwires exhibit a monocrystalline structure along their entire length, reported to extend up to 1 km[12]. The monocrystalline nature is associated with reversible shape memory straining of up to 12%, achieved without the need for thermal treatment or training processes.[13]
References
- ↑ "The smallest custom passive sensor in the world". www.rvactuators.com. Retrieved 2025-11-25.
- ↑ "~blue~Shape~/~ Memory Actuators". www.rvmagnetics.com. Retrieved 2025-11-25.
- ↑ "RVmagnetics", Wikipedia, 2025-11-25, retrieved 2025-11-25
- ↑ "RVactuators, s.r.o., IČO: 14051877 - rejstřík firem - Finmag.cz". www.finmag.cz (in čeština). Retrieved 2025-11-25.
- ↑ "The General Council - EMA - The European Magnetism Association". magnetism.eu. Retrieved 2025-11-25.
- ↑ "Technical Committee | IEEE Magnetics Society". ieeemagnetics.org. Retrieved 2025-11-25.
- ↑ "Prof. RNDr. ~blue~Rastislav Varga~/~, DrSc". www.rvmagnetics.com. Retrieved 2025-11-25.
- ↑ "Desatero úspěšné žádosti do výzvy Aplikace – Deep Tech". www.grantuj.cz (in čeština). 2025-10-03. Retrieved 2025-11-25.
- ↑ "DotaceEU - OP Technologies and Application for Competitiveness". dotaceeu.cz. Retrieved 2025-11-25.
- ↑ Hennel, M.; Galdun, L.; Ryba, T.; Varga, R. (2020-10-01). "Transition temperature tuning of Ni2FeGa based Heusler alloys in form of glass-coated microwires". Journal of Magnetism and Magnetic Materials. 511: 166973. doi:10.1016/j.jmmm.2020.166973. ISSN 0304-8853.
- ↑ Frolova, Lucia; Ryba, Tomas; Diko, Pavel; Kavecansky, Viktor; Milkovic, Ondrej; Dzubinska, Andrea; Reiffers, Marian; Vargova, Zuzana; Varga, Rastislav (2018-11). "Smart Shape Memory Actuator Based on Monocrystalline Ni2FeGa Glass-Coated Microwire". IEEE Transactions on Magnetics. 54 (11): 1–5. doi:10.1109/TMAG.2018.2848670. ISSN 1941-0069. Check date values in:
|date=(help) - ↑ "Technical overview of ~yellow~RVactuators~/~". www.rvactuators.com. Retrieved 2025-11-25.
- ↑ "Smart MicroActuators with Sensing Ability based on Shape Memory Effect in Heusler MicroWires | Activities Portal". activities.esa.int. Retrieved 2025-11-25.
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