scholarly journals Enhancing the Low-Frequency Induction Heating Effect of Magnetic Composites for Medical Applications

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 386 ◽  
Author(s):  
Ziyin Xiang ◽  
Khao-Iam Jakkpat ◽  
Benjamin Ducharne ◽  
Jean-Fabien Capsal ◽  
Jean-François Mogniotte ◽  
...  
Keyword(s):  
Induction Heating ◽  
Magnetic Particles ◽  
Varicose Veins ◽  
Local Heating ◽  
Low Frequency ◽  
Experimental Tests ◽  
Medical Applications ◽  
Magnetic Composite ◽  
Magnetic Composites ◽  
Frequency Excitation

This study aims to enhance the low-frequency induction heating (LFIH) effect in a thermoplastic polymer doped with iron oxide magnetic particles, which are promising candidates for several medical applications thanks to their confirmed biocompatibility. Two main approaches were proposed to successfully boost the heating ability; i.e., improving the magnetic concentration of the composite with higher filler content of 30 wt %, and doubling the frequency excitation after optimization of the inductor design. To test the magnetic properties of the ferromagnetic composite, a measurement of permeability as a function of temperature, frequency, and particle content was carried out. Thermal transfer based COMSOL simulations together with experimental tests have been performed, demonstrating feasibility of the proposed approach to significantly enhance the target temperature in a magnetic composite. These results are encouraging and confirmed that IH can be exploited in medical applications, especially for the treatment of varicose veins where local heating remains a true challenge.

scholarly journals Development of anisotropic ferromagnetic composites for low-frequency induction heating technology in medical applications

2021 ◽  
Vol 19 ◽  
pp. 100395
Author(s):  
Z. Xiang ◽  
M.Q. Le ◽  
P.-J. Cottinet ◽  
P. Griffiths ◽  
G.P. Baeza ◽  
...  
Keyword(s):  
Induction Heating ◽  
Low Frequency ◽  
Medical Applications ◽  
Heating Technology

scholarly journals Induction heating-based low-frequency alternating magnetic field: High potential of ferromagnetic composites for medical applications

2019 ◽  
Vol 174 ◽  
pp. 107804 ◽  
Author(s):  
Ziyin Xiang ◽  
Benjamin Ducharne ◽  
Nellie Della Schiava ◽  
Jean-Fabien Capsal ◽  
Pierre-Jean Cottinet ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Induction Heating ◽  
Low Frequency ◽  
High Potential ◽  
Alternating Magnetic Field ◽  
Medical Applications

Development of a Stress-Relied Annealing Device by using a Low Frequency Induction Heating Technique

2014 ◽  
Vol 134 (4) ◽  
pp. 217-222 ◽  
Author(s):  
Shogo Yoshida ◽  
Yuichiro Kai ◽  
Takashi Todaka ◽  
Masato Enokizono ◽  
Takeo Imagawa ◽  
...  
Keyword(s):  
Induction Heating ◽  
Low Frequency

scholarly journals A phase-locked loop using ESO-based loop filter for grid-connected converter: performance analysis

2021 ◽  
Author(s):  
Baoling Guo ◽  
Seddik Bacha ◽  
Mazen Alamir ◽  
Julien Pouget
Keyword(s):  
Performance Analysis ◽  
Frequency Domain ◽  
Low Frequency ◽  
Experimental Tests ◽  
Frequency Measurement ◽  
Phase Locked Loop ◽  
Frequency Domain Analysis ◽  
Loop Filter ◽  
Control Stability ◽  
Unbalanced Grid

AbstractAn extended state observer (ESO)-based loop filter is designed for the phase-locked loop (PLL) involved in a disturbed grid-connected converter (GcC). This ESO-based design enhances the performances and robustness of the PLL, and, therefore, improves control performances of the disturbed GcCs. Besides, the ESO-based LF can be applied to PLLs with extra filters for abnormal grid conditions. The unbalanced grid is particularly taken into account for the performance analysis. A tuning approach based on the well-designed PI controller is discussed, which results in a fair comparison with conventional PI-type PLLs. The frequency domain properties are quantitatively analysed with respect to the control stability and the noises rejection. The frequency domain analysis and simulation results suggest that the performances of the generated ESO-based controllers are comparable to those of the PI control at low frequency, while have better ability to attenuate high-frequency measurement noises. The phase margin decreases slightly, but remains acceptable. Finally, experimental tests are conducted with a hybrid power hardware-in-the-loop benchmark, in which balanced/unbalanced cases are both explored. The obtained results prove the effectiveness of ESO-based PLLs when applied to the disturbed GcC.

scholarly journals Low-frequency complex magnetic susceptibility of magnetic composite microspheres in colloidal dispersion

2007 ◽  
Vol 311 (1) ◽  
pp. 145-149 ◽  
Author(s):  
Ben H. Erné ◽  
Maria Claesson ◽  
Stefano Sacanna ◽  
Mark Klokkenburg ◽  
Emile Bakelaar ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Low Frequency ◽  
Colloidal Dispersion ◽  
Magnetic Composite ◽  
Composite Microspheres

Vibrational Resonance in an Overdamped System with a Fractional Order Potential Nonlinearity

2018 ◽  
Vol 28 (07) ◽  
pp. 1850082 ◽  
Author(s):  
Jianhua Yang ◽  
Dawen Huang ◽  
Miguel A. F. Sanjuán ◽  
Houguang Liu
Keyword(s):  
Numerical Simulation ◽  
Nonlinear System ◽  
Theoretical Analysis ◽  
Fractional Order ◽  
Low Frequency ◽  
Response Amplitude ◽  
Resonance Phenomenon ◽  
Vibrational Resonance ◽  
Frequency Excitation ◽  
Overdamped System

We investigate the vibrational resonance by the numerical simulation and theoretical analysis in an overdamped system with fractional order potential nonlinearities. The nonlinearity is a fractional power function with deflection, in which the response amplitude presents vibrational resonance phenomenon for any value of the fractional exponent. The response amplitude of vibrational resonance at low-frequency is deduced by the method of direct separation of slow and fast motions. The results derived from the theoretical analysis are in good agreement with those of numerical simulation. The response amplitude decreases with the increase of the fractional exponent for weak excitations. The amplitude of the high-frequency excitation can induce the vibrational resonance to achieve the optimal response amplitude. For the overdamped systems, the nonlinearity is the crucial and necessary condition to induce vibrational resonance. The response amplitude in the nonlinear system is usually not larger than that in the corresponding linear system. Hence, the nonlinearity is not a sufficient factor to amplify the response to the low-frequency excitation. Furthermore, the resonance may be also induced by only a single excitation acting on the nonlinear system. The theoretical analysis further proves the correctness of the numerical simulation. The results might be valuable in weak signal processing.

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