Electronic drive system of a linear magnetostrictive motor designed for outer space applications

Pîslaru‐Dănescu, Lucian; Morega, Alexandru M.; Morega, Mihaela; Chihaia, Rares; Popa, M.; Flore, Lică

doi:10.1109/atee.2015.7133769

Cited by 5 publications

(12 citation statements)

References 3 publications

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“…The DC supply voltage has to be in the range of U = 18 V-28 V, which is the voltage that is provided by photovoltaic panels used in outer space. Peltier elements (17) are used [19] to subcool the active central subassembly (A) and the coil subassembly (B) (see Appendix A) to lower than the contextual working temperature.…”

Section: Constructive and Functional Special Featuresmentioning

confidence: 99%

“…This hypothesis reduced the numerical complexity and the associated computational effort significantly. The associated quasi-stationary magnetic field problem is described by [19]:…”

Section: The Mathematical Modelmentioning

confidence: 99%

“…The two-way magnetoelastic coupling (the magnetic state of the system depends on its mechanical state and reciprocally) requires the solution of the magnetic and structural field at the same time, and to reduce the computational effort, a segregated time-stepping approach was used. The mathematical model was solved numerically using FEM [19]. The FEM mesh is shown in Figure 4.…”

Section: The Mathematical Modelmentioning

confidence: 99%

“…However, for enhanced and flexible control of GMA (the LMM), the bias magnetic field can be produced by either a magnetic bias coil [16,17] or a combination of permanent magnets and a magnetic bias coil [18]. The magnetic bias coil can either be powered by a DC source [16,17] or by a pulse width modulation (PWM) modulator, which provides a rectangular pulse train of a set frequency [18,19]. The duty cycle may be adjusted to minimize Joule losses.…”

Section: Introductionmentioning

confidence: 99%

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New Type of Linear Magnetostrictive Motor Designed for Outer Space Applications, from Concept to End-Product

Pîslaru‐Dănescu

Morega

Chihaia³

et al. 2021

Actuators

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The use of the linear magnetostrictive motor (LMM) in outer space, in the absence of Earth’s gravitational field and where extreme temperatures manifest, involves innovative technical solutions that result in significant construction changes. This paper highlights these constructive changes and presents the mathematical modeling followed by the numerical simulation of different operating regimes of LMM. The novelty of the design resides in using a bias coil instead, in addition to permanent magnets, to magnetize the magnetostrictive core and pulse width modulated (PWM) power sources to control the two coils of the LMM (bias and activation). The total absorbed current is less than 2 A, which results in the reduction of Joule losses. Moreover, a PWM source is provided to power and control a set of three Peltier elements aimed at cooling the device. The experiments validate the design of the LMM, which elicits it to power and control devices that may modulate fuel injection for rocket engines or for machines used to adjust positioning on circumterrestrial orbits.

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Section: Constructive and Functional Special Featuresmentioning

confidence: 99%

“…This hypothesis reduced the numerical complexity and the associated computational effort significantly. The associated quasi-stationary magnetic field problem is described by [19]:…”

Section: The Mathematical Modelmentioning

confidence: 99%

Section: The Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

New Type of Linear Magnetostrictive Motor Designed for Outer Space Applications, from Concept to End-Product

Pîslaru‐Dănescu

Morega

Chihaia³

et al. 2021

Actuators

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“…In addition, Thermo-Electric Coolers (TECs) have been considered, for a long time, for a number of applications such in that described in [17], where they are used to keep the chip temperature below an assigned threshold in electronic packaging systems, or in specialized air conditioning [18,19] and refrigeration applications [7,20,21,22]. …”

Section: Introductionmentioning

confidence: 99%

An Extensive Unified Thermo-Electric Module Characterization Method

Attivissimo

Carducci

Lanzolla

et al. 2016

Sensors

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Thermo-Electric Modules (TEMs) are being increasingly used in power generation as a valid alternative to batteries, providing autonomy to sensor nodes or entire Wireless Sensor Networks, especially for energy harvesting applications. Often, manufacturers provide some essential parameters under determined conditions, like for example, maximum temperature difference between the surfaces of the TEM or for maximum heat absorption, but in many cases, a TEM-based system is operated under the best conditions only for a fraction of the time, thus, when dynamic working conditions occur, the performance estimation of TEMs is crucial to determine their actual efficiency. The focus of this work is on using a novel procedure to estimate the parameters of both the electrical and thermal equivalent model and investigate their relationship with the operating temperature and the temperature gradient. The novelty of the method consists in the use of a simple test configuration to stimulate the modules and simultaneously acquire electrical and thermal data to obtain all parameters in a single test. Two different current profiles are proposed as possible stimuli, which use depends on the available test instrumentation, and relative performance are compared both quantitatively and qualitatively, in terms of standard deviation and estimation uncertainty. Obtained results, besides agreeing with both technical literature and a further estimation method based on module specifications, also provides the designer a detailed description of the module behavior, useful to simulate its performance in different scenarios.

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