Design and preliminary experimental results of 5 MW-NBI arc power supply for HL-2M tokamak

2021 ◽  
Vol 172 ◽  
pp. 112728
Author(s):  
Puqiong Yang ◽  
Bo Liu ◽  
Ying Zhang ◽  
Huiling Wei ◽  
Weimin Xuan
Keyword(s):  
Power Supply ◽  
Experimental Results ◽  
Arc Power

scholarly journals A Digital Improvement—Trimming a Digital Temperature Sensor with EEPROM Reprogrammable Fuses

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1700
Author(s):  
Anca Mihaela Vasile (Dragan) ◽  
Alina Negut ◽  
Adrian Tache ◽  
Gheorghe Brezeanu
Keyword(s):  
Standard Deviation ◽  
Power Supply ◽  
Temperature Sensor ◽  
Experimental Results ◽  
Temperature Error ◽  
Thermal Sensor ◽  
Memory Cells ◽  
Temperature Range ◽  
Read Only Memory ◽  
Digital Temperature Sensor

An EEPROM (electrically erasable programmable read-only memory) reprogrammable fuse for trimming a digital temperature sensor is designed in a 0.18-µm CMOS EEPROM. The fuse uses EEPROM memory cells, which allow multiple programming cycles by modifying the stored data on the digital trim codes applied to the thermal sensor. By reprogramming the fuse, the temperature sensor can be adjusted with an increased trim variation in order to achieve higher accuracy. Experimental results for the trimmed digital sensor showed a +1.5/−1.0 ℃ inaccuracy in the temperature range of −20 to 125 ℃ for 25 trimmed DTS samples at 1.8 V by one-point calibration. Furthermore, an average mean of 0.40 ℃ and a standard deviation of 0.70 ℃ temperature error were obtained in the same temperature range for power supply voltages from 1.7 to 1.9 V. Thus, the digital sensor exhibits similar performances for the entire power supply range of 1.7 to 3.6 V.

An 8kW LLC resonant converter in plasma power supply based on SiC power devices for efficiency improvement

Circuit World ◽  
2019 ◽  
Vol 45 (4) ◽  
pp. 181-188
Author(s):  
Zhenmin Wang ◽  
Wenyan Fan ◽  
Fangxiang Xie ◽  
Chunxian Ye
Keyword(s):  
Silicon Carbide ◽  
Power Supply ◽  
High Frequency ◽  
Experimental Results ◽  
Switching Frequency ◽  
Resonant Converter ◽  
Plasma Power ◽  
Power Devices ◽  
Content Type ◽  
Llc Resonant Converter

Purpose This paper aims to present an 8 kW LLC resonant converter designed for plasma power supply with higher efficiency and lighter structure. It presents how to solve the problems of large volume and weight, low performance and low efficiency of traditional plasma power supply. Design/methodology/approach At present, conventional silicon (Si) power devices’ switching performance is close to the theoretical limit determined by its material properties; the next-generation silicon carbide (SiC) power devices with outstanding advantages can be used to optimal design. This 8 kW LLC resonant converter prototype with silicon carbide (SiC) power devices with a modulated switching frequency ranges from 100  to 400 kHz. Findings The experimental results show that the topology, switching loss, rectifier loss, transformer loss and drive circuit of the full-bridge LLC silicon carbide (SiC) plasma power supply can be optimized. Research limitations/implications Due to the selected research object (plasma power supply), this study may have limited universality. The authors encourage the study of high frequency resonant converters for other applications such as argon arc welding. Practical implications This study provides a practical application for users to improve the quality of plasma welding. Originality/value The experimental results show that the full-bridge LLC silicon carbide (SiC) plasma power supply is preferred in operation under conditions of high frequency and high voltage. And its efficiency can reach 98%, making it lighter, more compact and more efficient than previous designs.

The control and design of a arc power supply for the neutral beam injection

2011 ◽  
Author(s):  
Hee-Jun Lee ◽  
Soo-Cheol Shin ◽  
Chung-Yuen Won ◽  
Seoung-Gyo Lee ◽  
Sun-Soon Park ◽  
...  
Keyword(s):  
Power Supply ◽  
Neutral Beam Injection ◽  
Neutral Beam ◽  
Beam Injection ◽  
Arc Power

scholarly journals Reconfigurable equilibrium circuit with additional power supply

2019 ◽  
Vol 15 (1) ◽  
pp. 106-111 ◽  
Author(s):  
Yu Zhang ◽  
Mingming Huang ◽  
Tiezhou Wu ◽  
Feng Ji
Keyword(s):  
Single Cell ◽  
Conversion Efficiency ◽  
Discharge Capacity ◽  
Power Supply ◽  
State Of Charge ◽  
Experimental Results ◽  
Battery Pack ◽  
Number Of Components ◽  
Better Than

Abstract The reconfigurable equilibrium circuit can take account of the number of components and the conversion efficiency and can easily balance every single cell in the battery pack, but the voltage of the battery pack will fluctuate when the battery pack is balanced. To solve this problem, a reconfigurable equalization circuit with an additional power supply is proposed. By replacing the cell with the additional power supply, the purpose of stabilizing the voltage of the battery pack is achieved. Aiming at the additional power supply, this paper puts forward a method that the additional power supply participates in the charging (discharging) process when the SOC (state of charge) of the battery pack is not lower (higher) than the additional power supply while the battery pack is charging (discharging), to make the charge and discharge capacity of the additional power supply always better than the battery pack. The experimental results show that the proposed equalization circuit can not only retain the advantages of the traditional reconfigurable equilibrium circuit but also maintain the voltage of the battery pack in the equalization process.

Designing of a High Voltage Power Supply for Electrospinning Apparatus Using a High Voltage Flyback Transformer (HVFBT)

2015 ◽  
Vol 771 ◽  
pp. 145-148 ◽  
Author(s):  
Muhammad Miftahul Munir ◽  
Dian Ahmad Hapidin ◽  
Khairurrijal
Keyword(s):  
High Voltage ◽  
Duty Cycle ◽  
Power Supply ◽  
Pulse Width ◽  
Output Voltage ◽  
Pulse Width Modulation ◽  
Experimental Results ◽  
High Voltage Power Supply ◽  
Electrospinning Technique ◽  
The World

Research on nanofiber materials is actively done around the world today. Various types of nanofibers have been synthesized using an electrospinning technique. The most important component when synthesizing nanofibers using the electrospinning technique is a DC high voltage power supply. Some requirements must be fulfilled by the high voltage power supply, i.e., it must be adjustable and its output voltage reaches tens of kilovolts. This paper discusses the design and development of a high voltage power supply using a diode-split transformer (DST)-type high voltage flyback transformer (HVFBT). The DST HVFBT was chosen because of its simplicity, compactness, inexpensiveness, and easiness of finding it. A pulse-width modulation (PWM) circuit with controlling frequency and duty cycle was fed to the DST HVFBT. The high voltage power supply was characterized by the frequency and duty cycle dependences of its output voltage. Experimental results showed that the frequency and duty cycle affect the output voltage. The output voltage could be set from 1 to 18 kV by changing the duty cycle. Therefore, the nanofibers could be synthesized by employing the developed high voltage power supply.

scholarly journals Selective Glaze for Last Line Visible Thermal Head

1981 ◽  
Vol 8 (1-2) ◽  
pp. 115-121
Author(s):  
Kaoru Hashimoto ◽  
Nobuo Kamehara ◽  
Minoru Terashima ◽  
Koichi Niwa
Keyword(s):  
Thin Film ◽  
Thick Film ◽  
Power Supply ◽  
Ceramic Substrate ◽  
Alumina Substrate ◽  
Experimental Results ◽  
Print Quality ◽  
Heat Sources ◽  
Fine Grained ◽  
Screen Printed

A thermal head in which the last line is visible allows characters to be viewed as soon as they are printed. The thermal head is constructed with a selective glazed layer and heat sources, which are formed at the edge of a ceramic substrate. The selective glazed layer must be smooth and flat, even at the edge, for heat sources to be formed on it. Selective glaze characteristics were studied using PbO-B2O3-SiO2and B2O3-SiO2glazing materials to realize the last line visible thermal head. Several commercially available gold conductors were screen printed on fine grained alumina substrates. Wettability, levelling characteristics and flatness at the edge of the selective glaze on each gold conductor were examined. Dependence of their characteristics on firing conditions were also examined. A combination of PbO-B2O3-SiO2glass and fritless gold conductor provides a smooth and flat glaze surface even at the edge, and experimental results show that PbO-B2O3-SiO2glazing material has the most suitable characteristics for a last line visible thermal head. A last line visible thermal head was formed using PbO-B2O3-SiO2glazing material. The selective glazed layer was formed over the thick film circuits of gold for the power supply, which were screen printed on a fine grained alumina substrate. Ta2N thin film for resistive heat sources was formed at the edge of the glazed layer. The thermal head provides good print quality and can print 20 characters/line at 5 lines/sec with a resolution of 2.7 dots/mm.

scholarly journals Reduction of heat sink common-mode currents in switching mode power supply circuits

2011 ◽  
Vol 9 ◽  
pp. 317-321 ◽  
Author(s):  
J. Kulanayagam ◽  
J. H. Hagmann ◽  
K. F. Hoffmann ◽  
S. Dickmann
Keyword(s):  
Electric Power ◽  
Power Supply ◽  
Heat Sink ◽  
Filter Design ◽  
Experimental Results ◽  
Power Devices ◽  
Common Mode ◽  
Switching Mode Power Supply ◽  
Switching Mode

Abstract. In this paper, a new filter design for a heat sink is presented. The parasitic couplings between electric power devices and the heat sink are responsible for common-mode currents. The main focus is on the reduction of these currents to reduce the heat sink radiation. For this purpose a new filter design is proposed. In addition, experimental results are shown to validate the proposed filter.

Real-Time Implementation of Sliding Mode Observer for Synchronous Rectification of the Automotive Electrical Power Supply System

2000 ◽  
Vol 122 (4) ◽  
pp. 594-598 ◽  
Author(s):  
De-Shiou Chen ◽  
Vadim I. Utkin ◽  
Shahram Zarei ◽  
John M. Miller
Keyword(s):  
Real Time ◽  
Power Supply ◽  
Power Supply System ◽  
Sliding Mode ◽  
Current Model ◽  
Electrical Power ◽  
Supply System ◽  
Sliding Mode Observer ◽  
Experimental Results ◽  
Mechanical Sensor

This paper presents the methods for estimating automotive alternator’s back electromotive forces without a direct mechanical sensor of the rotor position. The design approach combines the merits of the sliding mode observer technique with the basics of a conventional observer. It is shown that the back electromotive forces may be observed based on system’s phase current model by sensing only electrical variables of the synchronous rectifier. Experimental results are presented for validation of the proposed observation algorithms. [S0022-0434(00)01404-0]

Study on multi control mode of arc power supply on NBI

2021 ◽  
Author(s):  
Junjun Pan ◽  
Lian Duan ◽  
Zhimin Liu ◽  
Shiyong Chen ◽  
Caichao Jiang ◽  
...  
Keyword(s):  
Power Supply ◽  
Control Mode ◽  
Arc Power
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