High voltage magnetic pulse generation using capacitor discharge technique

Rezal, M.; Ishak, Dahaman; Sabri, M.

doi:10.1016/j.aej.2014.10.001

Cited by 7 publications

(5 citation statements)

References 7 publications

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“…6. Equations ( 5) to (7) were used for calculating the voltage applied to the load and current and charge, where the repetition rate is 100 Hz for the calculation parameter. The VB is 4 kV, C0 is 10 pF, CB is 100 pF, Vini is 10kV, and Rp is 200 Mohm.…”

Section: ．Results and Discussionmentioning

confidence: 99%

“…Pulse power sources, which can produce high temperature or high-density extreme conditions by releasing electric or magnetic energy stored in coils or capacitors within a short time, have been introduced to various fields such as those in laser [1], fusion research [2], the production of plasma, shockwaves in water, water treatment, and exhaust gas treatments [3][4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Various pulse power sources have now been developed due to the expanding fields of application [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. The required conditions for pulse power sources differ according to applications.…”

Section: Introductionmentioning

confidence: 99%

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High-voltage Pulse Generation Using Electrostatic Induction in Capacitor

Saiki¹

2019

IJECEC

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Pulse power sources can produce high temperature or high-density extreme conditions within a short time. They have been introduced to various fields such as those in laser, fusion research, the production of plasma, shockwaves in water, water treatment, and exhaust gas treatments. Various high voltage pulse sources using insulated-gate bipolar transistor (IGBT) semiconductors with high voltage resistivity have been used. Also, Marx bank circuit is well known as an instrument that produces voltage pulses with low repetitive rates. These instruments have several advantages. However, their problems are a complex structure, high cost, and excessive weight. A simple method of producing high voltage pulses with short rising times based on electrostatic induction in external capacitor used for pulse power applications is proposed. The circuit has a simple structure and contains a minimum number of parts, which makes the instrument small and light weight. In fact, the generation of sawtoothed high voltage pulses with short rising times and low repetitive rates of a few 100 Hz was successfully conducted in experiments. Theoretical analysis was simultaneously undertaken. The numerically calculated results for generating high voltage pulses were goodly consistent with the experimental ones. Moreover, it has been confirmed that amplification of the output voltage by electro-hydrodynamics (EHD) electricity generation using a jet flame resulted in higher voltage pulses, lower electricity consumption, and high repetition rates.

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Section: ．Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-voltage Pulse Generation Using Electrostatic Induction in Capacitor

Saiki¹

2019

IJECEC

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“…B at V ex = 600 V. This electrical current was obtained by the measured voltage of the wire between the outlet of the thyristor and the positive pole of the magnet coil. The electric resistance of the wire was 2.43 mΩ, and the maximum voltage of the wire was 13.1 V. Therefore, the maximum current I max was 5.34 kA at V ex = 600 V. Further, the magnetic field was calculated using equation (8) presented in reference [18] and by using the electrical current of the magnet coil obtained from the experiments. The calculated magnetic field was 16.1 T, which is comparable to the experimental result of 15.7 T. The nominal value of the maximum surge current I TSM of the thyristor was 17 kA; therefore, the maximum current of I max (5.34 kA) is half of that of the I TSM .…”

Section: New Pulse Magnetic Fields Magnetmentioning

confidence: 99%

Home-made pulse magnet power supply for magnetizing permanent magnets and magnetic measurements

Sakon

Kitagawa²,

Miyaoku³

2022

Eng. Res. Express

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In this article, we propose a home-made pulse magnetic field generation system constructed using a thyristor and large capacitance capacitors to generate high magnetic fields to investigate magnetic properties and magnetize the magnet and high-performance magnetic materials at room temperature. The proposed system produced a magnetic induction (magnetic field) μ 0H of 15.6 T with the 33.6 mF capacitor and an excitation voltage of 600 V. Further, we designed a new power supply system and a pulse magnet using the commercially available pulse magnet and power supply. We found that the duration time of the magnetic fields (t d) and the generated magnetic fields were three and four times larger than those for a conventional system, respectively. We also performed magnetization of a NEOMAX permanent magnet; the coercivity (ΒCJ) was 2.0 T, and the magnetization saturated at ~4.0 T. These results suggest that we can magnetise a permanent magnet such as NEOMAX with strong magnetic fields using this system. Further, the magnetic measurements of these magnets can be performed as well. The merit of our system is that the capacitance of the capacitor bank is larger than that of other studies or general commercial power supplies. Therefore, relatively high magnetic fields with long duration time can be generated. We also performed experiments on the magnetization process (M-H) of Gd to investigate the magnetocaloric effect in high magnetic fields. The magnetic entropy change was comparable to the result of former investigation. We believe that our research can contribute to the development of permanent magnets and magnetic materials for scientific and industrial use because our system allows the generation of strong magnetic fields at room temperature.

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“…[103,104] Future focus on performance improvement will heavily rely on the magnetic field-generating equipment, specifically including equipment miniaturization and increasing electromagnetic (EM) conversion efficiency. [105] Tuning the properties, e.g., stiffness and magnetic permeability, of soft magnetic composites is another way to alleviate this problem, which in turn lowers their demands on magnetic field strength. [106][107][108] In addition, it should be reminded that strong magnetic field may intervene or disturb the function of other electronic devices that already exist in the patient's body, and it is preferable for surgeons to manipulate remotely due to the potential health issues in long-term exposure to strong magnetic fields.…”

Section: Magnetic Actuationmentioning

confidence: 99%

Intelligent Soft Surgical Robots for Next‐Generation Minimally Invasive Surgery

Zhu

Lyu

et al. 2021

Advanced Intelligent Systems

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Endowed with the expected visions for future surgery, minimally invasive surgery (MIS) has become one of the most rapid developing areas in modern surgery. Soft robotics, which originates from interdisciplinary advances in materials, fabrication, and electronics, featuring better adaptability and safer interaction, holds great promises in addressing current technical challenges in MIS, which are difficult to be solved with current rigid robotic technologies. For the first time, herein, the expected characteristics of next-generation MIS from the surgeons' perspectives are analyzed and the recent progress of soft surgical instruments from three different aspects is comprehensively summarized: engineering design, fabrication techniques, and human-robot interaction. Perspectives of nextgeneration soft surgical robots are then discussed, where some exciting possibilities are emphasized. It is believed that further developments of intelligent soft robotics enable the next-generation MIS to agilely navigate to the target and conduct dexterous diagnostic or therapeutic procedures without any trade-offs in invasiveness and ultimately be a propitious solution for future surgery.

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High voltage magnetic pulse generation using capacitor discharge technique

Cited by 7 publications

References 7 publications

High-voltage Pulse Generation Using Electrostatic Induction in Capacitor

High-voltage Pulse Generation Using Electrostatic Induction in Capacitor

Home-made pulse magnet power supply for magnetizing permanent magnets and magnetic measurements

Intelligent Soft Surgical Robots for Next‐Generation Minimally Invasive Surgery

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