Effects of Flexible Induction Coil Pitch on the Heating Performance of Thermotherapy Needles

Chang, Chau‐Lyan; Tai, Cheng‐Chi; Lin, Fang-Wei; Kuo, Chung-Ching; Hung, Chia-Ming

doi:10.1109/tim.2020.2998302

Cited by 6 publications

(5 citation statements)

References 29 publications

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“…This armamentarium of induction coils provides the ability to customize magnetic field distributions for improved coupling of energy into ferromagnetic implant arrays located at any depth or orientation in the body. A flexible laminated copper (FLC) coil for electromagnetic thermotherapy is proposed in [118]. The effect of pitch (the distance between coil turns) on the heating performance of the proposed FLC coil is shown.…”

Section: Medical Applicationsmentioning

confidence: 99%

Induction Heating in Domestic Cooking and Industrial Melting Applications: A Systematic Review on Modelling, Converter Topologies and Control Schemes

et al. 2021

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In the current scenario, power electronic device-based induction heating (IH) technologies are widely employed in domestic cooking, industrial melting and medical applications. These IH applications are designed using different converter topologies, modulation and control techniques. This review article mainly focuses on the modelling of half-bridge series resonant inverter, electrical and thermal model of IH load. This review also analyses the performance of the converter topologies based on the power conversion stages, switching frequency, power rating, power density, control range, modulation techniques, load handling capacity and efficiency. Moreover, this paper provides insight into the future of IH application, with respect to the adaptation of wide band-gap power semiconductor materials, multi-output topologies, variable-frequency control schemes with minimum losses and filters designed to improve source-side power factor. With the identified research gap in the literature, an attempt has also been made to develop a new hybrid modulation technique, to achieve a wide range of power control with high efficiency. A 100 W full-bridge inverter prototype is realised both in simulation and hardware, with various modulation schemes using a PIC16F877A microcontroller. The results are compared with existing techniques and the comparisons reveal that the proposed scheme is highly viable and effective for the rendered applications.

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Section: Medical Applicationsmentioning

confidence: 99%

Induction Heating in Domestic Cooking and Industrial Melting Applications: A Systematic Review on Modelling, Converter Topologies and Control Schemes

et al. 2021

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“…Therefore, switching energies increase accordingly. The manufacturer provides switching energy characteristics as a function of RG for 800 V. Referring to the switching energy characteristics determined for RG = 2.5 Ω discussed above, a correction coefficient is introduced (10).…”

Section: Oss T Oss DCmentioning

confidence: 99%

“…In recent decades, IH systems have found many practical applications and have become a subject of intense research. They are mainly applied in industry [2][3][4], domestic applications [5][6][7] and medicine [8][9][10]. IH technology has been an increasingly attractive research area due to advantages over conventional heating methods [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Single Three-Phase Inverter for Dual-Frequency Induction Heating

Frania,

Kierepka,

Kasprzak

et al. 2024

Energies

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This paper presents new resonant inverter topologies for dual-frequency induction heating (IH). These 2T1C and 3T topologies combine the advantageous features of two- and one-inverter solutions. An analytical description of the load impedance of a dual-frequency series-parallel circuit has been made. Using manufacturer datasheets and LTspice models of selected transistors, a MATLAB model was parameterized. Based on it, power losses are determined as a function of the following parameters: nominal power, frequency and DC bus voltage. The obtained results allowed for determining the data necessary in the design process. The research has been experimentally verified. Tests were carried out for pulsing and simultaneous operation. Power control characteristics as a function of frequency are determined. The possibility of operating the inverter with high efficiency (>97%) in the proposed 2T1C and 3T systems at nominal power is demonstrated.

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“…where T , c, K are the temperature, specific heat capacity, and thermal conductivity of the biological tissue, respectively. t is the heat transfer time and Q e is the external heat source, which is transformed from microwave power for MWA process [27] and is equal to…”

Section: A Ablation Modelmentioning

confidence: 99%

Adaptive Microwave Ablation System for Localized Tumor Treatment

Wang

Bao

Liu

et al. 2023

IEEE Trans. Microwave Theory Techn.

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Though microwave ablation (MWA) technology has shown obvious advantages, it has the problem that the ablation zone is not sufficiently localized. As a result, normal tissue might be inevitably damaged during the ablation process. To solve this problem, the comprehensive MWA theory is firstly analyzed in this paper, and then a frequency-adaptive ablation approach is proposed and verified by simulations. Accordingly, a frequency-adaptive MWA system for optimizing the ablation zone is developed. As the tissue's electromagnetic properties change with the increasing of temperature during the ablation, the proposed system is designed to monitor the working performance of the antenna in real-time and to automatically select the optimum working frequency, simultaneously. The ablationcontrolling system is designed as an integrated controller, so that the overall size and the fabrication cost are obviously reduced. Preliminary validation experiments are performed on the system, which shows that the proposed system is capable of delivering stable power output from 0.5 GHz to 3 GHz and creating a highly localized ablation zone. The proposed MWA system is expected to be a dedicated device for the treatment of tumors.

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Effects of Flexible Induction Coil Pitch on the Heating Performance of Thermotherapy Needles

Cited by 6 publications

References 29 publications

Induction Heating in Domestic Cooking and Industrial Melting Applications: A Systematic Review on Modelling, Converter Topologies and Control Schemes

Induction Heating in Domestic Cooking and Industrial Melting Applications: A Systematic Review on Modelling, Converter Topologies and Control Schemes

Single Three-Phase Inverter for Dual-Frequency Induction Heating

Adaptive Microwave Ablation System for Localized Tumor Treatment

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