Draft:RVactuators
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Submission declined on 15 December 2025 by MCE89 (talk).
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| Submission declined on 27 November 2025 by Bonadea (talk). This draft's references do not show that the subject qualifies for a Wikipedia article. In summary, the draft needs multiple published sources that are: Declined by Bonadea 20 days ago.
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Comment: Please note that Wikipedia is not a reliable source and should be removed. MCE89 (talk) 19:25, 15 December 2025 (UTC)
RVactuators, s.r.o. is a research and development company based in Czech Republic that specializes in manufacturing and customisation of MicroActuators based on Shape Memory Effect in Heusler MicroWires.[1]
RVactuators is a sister company of RVmagnetics active in passive contactless MicroWire Sensors.
Scope of the company's work lays in prototyping and customisation of the Heusler MicroWires to meet the requirements of the 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.
History
[edit]The company was founded in 2024[2] by Rastislav Varga, former Member of the General Council at the European Magnetism Association [3] and Member of the Technical Committee of IEEE Magnetics Society [4] and Member of European Physical Society (EPS) [5]
Contracts
[edit]RVactuators has been awarded Early Technology Development contract in November 2025 by ESA (European Space Agency).[6]
Company has also applied for grant DEEP TECH,[7] provided under The Operational Program Technologies and Application for Competitiveness (OP TAC) under Managing authority of Ministry of Industry and Trade of Czech Republic.[8]
Shape Memory Actuation Technology
[edit]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.[9]
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% [10] 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[11]. The monocrystalline nature is associated with reversible shape memory straining of up to 12%, achieved without the need for thermal treatment or training processes.[12]
References
[edit]- ^ Galdun, L; Vidyasagar, R; Hennel, M; Varga, M; Ryba, T; Nulandaya, L; Milkovič, O; Reiffers, M; Kravčák, J; Vargova, Z; Varga, R (2021-10-26). (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36 Citoid/WMF (mailto:noc@wikimedia.org)&ssu=&ssv=&ssw=&ssx=eyJ1em14IjoiN2Y5MDAwZmRjMjJlN2ItNzA2OC00YTk4LWExNTMtY2M4MjkwM2QzYzM3MS0xNzY1MjAzNDExNjQwMC1hZTc1OTkxNzc1ZGQ2Y2MxMTAiLCJfX3V6bWYiOiI3ZjkwMDBlYjY2YjNiZS04MmZiLTQwYWMtOGRhNS05OGNlZDU2Mjc1MzgxLTE3NjUyMDM0MTE2NDAwLTAwMWZkOWUwMTVjZDExOGI2NmYxMCIsInJkIjoiaW9wLm9yZyJ9 "Fe–Mn–Ga shape memory glass-coated microwire with sensing possibilities". Journal of Physics D: Applied Physics. 55 (4): 045303. doi:10.1088/1361-6463/ac2f6b. ISSN 0022-3727.
{{cite journal}}: Check|url=value (help) - ^ "RVactuators, s.r.o., IČO: 14051877 - rejstřík firem - Finmag.cz". www.finmag.cz (in Czech). 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.
- ^ "Smart MicroActuators with Sensing Ability based on Shape Memory Effect in Heusler MicroWires | Activities Portal". activities.esa.int. Retrieved 2025-12-08.
- ^ "Desatero úspěšné žádosti do výzvy Aplikace – Deep Tech". www.grantuj.cz (in Czech). 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.
{{cite journal}}: CS1 maint: article number as page number (link) - ^ Frolova, Lucia; Ryba, Tomas; Diko, Pavel; Kavecansky, Viktor; Milkovic, Ondrej; Dzubinska, Andrea; Reiffers, Marian; Vargova, Zuzana; Varga, Rastislav (November 2018). "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.
- ^ "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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