Development of Compact Ozonizer with High Ozone Output by Pulsed Power

Tomita, Fumiaki; Ueda, S.; Kouno, K.; Sakugawa, Takashi; Akiyama, H.; Kinoshita, Y.

doi:10.1541/ieejfms.130.579

Cited by 8 publications

(4 citation statements)

References 9 publications

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“…Recent applied research on pulsed power covers a broad range of fields including water and gas treatment with pulsed streamer discharge, ozone generation, etc . Since the 1980s, semiconductor power devices have been used as switches in pulsed power supplies .…”

Section: Introductionmentioning

confidence: 99%

“…Recent applied research on pulsed power covers a broad range of fields including water and gas treatment with pulsed streamer discharge, ozone generation, etc. [1][2][3] Since the 1980s, semiconductor power devices have been used as switches in pulsed power supplies. 4 As compared to gap switches and other discharge switches, semiconductor switches are advantageous in terms of stability and durability.…”

Section: Introductionmentioning

confidence: 99%

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Study of SiC device for pulsed power switching circuit

Tagawa

Yamashita

Sakugawa

et al. 2019

Electrical Engineering Japan

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Pulsed power generator using semiconductor switches have been developed. We have developed switching module using discrete type Silicon Carbide (SiC) Device for pulsed power circuit. We compare the switching module using SiC‐MOSFETs with conventional module using IGBTs. Both of switching devices the switching loss increased when the voltage get higher. The switching module using SiC‐MOSFETs can input higher voltage and has less switching loss in same input voltage. Also, we have investigate the switching loss depend on di/dt at switching. The permissible di/dt of SiC‐MOSFETs was higher than IGBTs. However, there is a limit to the value of permissible di/dt. The loss in this module is reduced by applying magnetic assist. The advantage of SiC‐MOSFET was confirmed in switching for pulsed power.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of SiC device for pulsed power switching circuit

Tagawa

Yamashita

Sakugawa

et al. 2019

Electrical Engineering Japan

Self Cite

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“…Pulsed power generators for industrial applications must meet a number of requirements, including compact size, low cost, high repetition rate, and long life. When a discharge plasma is produced by pulsed power generators, the discharge mode and throughput vary with output voltage fluctuations [2]. Thus, there is a need to develop highly versatile pulsed power generators that can efficiently output a specified voltage under varying load and fluctuating source voltage, without changing the circuit configuration.…”

Section: Introductionmentioning

confidence: 99%

Output Voltage Control and Efficiency Improvement of Multistage Impulse Voltage Generator by Utilizing Inductive Energy Storage

Saito

Iwazaki

Maeyama

2015

Electrical Engineering Japan

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In this paper, we propose two control methods of a static impulse voltage generator to lower the influence of dc voltage source fluctuations on the output voltage and to improve its efficiency by reusing discarded inductive storage energy. Introducing output voltage control adjusting the charging period of capacitive and inductive energy in accordance with the source voltage, the output voltage fluctuation by the source voltage decreased by 61.1%. Applying the reusing method, we estimated by circuit simulation that the amount of energy that could be recovered was 21.0% and the efficiency of energy transfer was improved from 60.4% to 76.7%. C⃝ 2015 Wiley Periodicals, Inc. Electr Eng Jpn, 193(4): 18-24, 2015; Published online in Wiley Online Library (wileyonlinelibrary.com).

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“…High repetitive pulsed power modulators ranging from severalhundred pps to kpps are especially important for industrial applications that also require low switching loss (stability) and miniaturization of the pulsed power modulator [3][4].…”

Section: Introductionmentioning

confidence: 99%

A study on capacitor charger using variable frequency inverter as a high repetitive pulsed power modulator

Kajiwara

Asou

Sakugawa

et al. 2014

2014 IEEE International Power Modulator and High Voltage Conference (IPMHVC)

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Various methods exist for capacitor charging circuits, but for all, a high frequency inverter is indispensable to realize high repetitive operation of the pulsed power modulator. While high frequency operation of the inverter is effective in charging voltage accuracy, the switching loss increases in proportion to the frequency of the inverter. This study utilizes a half-bridge circuit as inverter circuit to the charger characterized by the following components: The switching device is a SiC-based MOSFET (SiliconCarbide based Metal Oxide Semiconductor Field Effect Transistor), and the converter circuit uses high-speed SiCbased diodes. After simulating capacitor charging circuit loss while varying operating frequency of the variable frequency inverter, we analyzed the stability of the charging voltage, continuous operation, and downsizing of charger.

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Development of Compact Ozonizer with High Ozone Output by Pulsed Power

Cited by 8 publications

References 9 publications

Study of SiC device for pulsed power switching circuit

Study of SiC device for pulsed power switching circuit

Output Voltage Control and Efficiency Improvement of Multistage Impulse Voltage Generator by Utilizing Inductive Energy Storage

A study on capacitor charger using variable frequency inverter as a high repetitive pulsed power modulator

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