Analytical estimation of parasitic capacitances in high‐voltage switching transformers

Mirzadarani, Reza; Mohammadi, Hamid Reza; Ketabi, Abbas; Motahari, Seyed Reza; Ghorbani, A.

doi:10.1049/iet-pel.2020.0053

Cited by 8 publications

(7 citation statements)

References 32 publications

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“…A possible explanation could be parasitic capacitance. Due to this parasitic capacitance, all probes are limited by a self-resonant frequency, above which the probes will not behave as an inductor anymore [19][20][21][22]. Thus, above 1 MHz the increased parasitic capacitance showed some error or artifact, which was also observed in our previous studies [3,9].…”

Section: Discussionsupporting

confidence: 71%

Novel 3D printed probe for bioimpedance spectroscopic measurement of oral mucosa: design and testing with ex vivo porcine oral tissues

Emran

Jokinen

Laitinen

et al. 2023

Meas. Sci. Technol.

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Three-dimensional (3D) printing has a high potential in various biomedical applications. We hypothesise that 3D printing could be a viable option to construct bioimpedance spectroscopic (BIS) sensors suitable for electrochemical characterization of oral mucosal tissues. Previous BIS studies have been relied on hand-made probes possessing significant limitations related to single patient disposable use, great inter-probe differences and weak reproducibility of measurement. There is also uncertainty related to effect of varying loading pressure between the probe and biological tissue. Here, we introduced three different sized rectangular shaped 3D printed probes and test those using four-terminal measurement principle on various porcine oral tissue samples. We found that constructing fully 3D printed probe is a challenging task and prone to issues relating to short circuiting or electrochemical corrosion. However, our final protype version constructed with silver-coated copper electrodes showed favourable characteristics in BIS experiments. All three different sized probes were able to differentiate between different tissue types with excellent reproducibility. The effect of loading pressure was found to be almost negligible when using small and medium sized probes. However, further studies are needed to measure tissues with uneven surfaces, such as palatinum, and to avoid manual or electrochemical surface finishing steps.

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Section: Discussionsupporting

confidence: 71%

Novel 3D printed probe for bioimpedance spectroscopic measurement of oral mucosa: design and testing with ex vivo porcine oral tissues

Emran

Jokinen

Laitinen

et al. 2023

Meas. Sci. Technol.

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“…Due to the influence of materials and manufacturing process, parasitic parameters such as parasitic resistance, capacitance and inductance are found to exist in the actual inductor and capacitor. Especially as the operating frequency increases, the influence of these frequency-dependent parasitic parameters on the circuit performance becomes more obvious (Maturi and Samanta, 2020; Mirzadarani et al , 2020) and even leads to large errors in circuit analysis and design. In addition, the health of the capacitor can be monitored by tracking the impedance value of the capacitor (Braham et al , 2010; Malek et al , 2016).…”

Section: Introductionmentioning

confidence: 99%

Fractional equivalent circuit model and parameter identification of reactance components in high-frequency operation

Chen

Zhang

et al. 2023

COMPEL

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Purpose The purpose of this paper is to find a simpler model for the reactance components in the high-frequency range on the premise of ensuring the accuracy. Design/methodology/approach In this paper, based on the fractional calculus theory and the traditional integer-order model, a reactance model suitable for high frequency is constructed, and the mutation cross differential evolution algorithm is used to identify the parameters in the model. Findings By comparing the integer-order model, high-frequency fractional-order model and the actual impedance characteristic curve of inductance and capacitance, it is verified that the proposed model can more accurately reflect the high-frequency characteristics of inductance and capacitance. The simulation and experimental results show that the oscillator constructed based on the proposed model can analyze the frequency and output waveform of the oscillator more accurately. Originality/value The model proposed in this paper has a simple structure and contains only two parameters to be identified. At the same time, the model has high precision. The fitting errors of impedance curve and phase-frequency characteristic curve are less than 5%. Therefore, the proposed model is helpful to improve the simplicity and accuracy of circuit system analysis and design.

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“…This requires computationally efficient, at best, fully analytical models in order to investigate several thousand possible designs within an optimisation routine in a reasonable time. Many papers addressing the analytical modelling of parasitic transformer capacitances have been published in the past [7]- [12]. However, most of them either neglect the influence of the core on the capacitances or assume the core potential to be floating, which simplifies the resulting equivalent circuit (EC) to a six capacitance network.…”

Section: Introductionmentioning

confidence: 99%

Fully Analytical Double 2D Model for a Capacitive Equivalent Circuit of Transformers

Korthauer,

Biela

2023

2023 25th European Conference on Power Electronics and Applications (EPE'23 ECCE Europe)

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Analytical estimation of parasitic capacitances in high‐voltage switching transformers

Cited by 8 publications

References 32 publications

Novel 3D printed probe for bioimpedance spectroscopic measurement of oral mucosa: design and testing with ex vivo porcine oral tissues

Novel 3D printed probe for bioimpedance spectroscopic measurement of oral mucosa: design and testing with ex vivo porcine oral tissues

Fractional equivalent circuit model and parameter identification of reactance components in high-frequency operation

Fully Analytical Double 2D Model for a Capacitive Equivalent Circuit of Transformers

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