DC characteristics of the SiC Schottky diodes

Janke, W.; Hapka, Aneta; Oleksy, M.

doi:10.2478/v10175-011-0022-1

Cited by 10 publications

(10 citation statements)

References 8 publications

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“…A high intensity discharge (HID) lamp was powered by four different current waveforms, generated by four different verters are SiC diodes. Their characteristics are described in [8]. The power loss reduction methods, partially used in control algorithms, are presented in [9].…”

Section: Power Supply Methods and The Results Of High-speed Light Intmentioning

confidence: 99%

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Investigation of HID-lamp light emission differences for different power supply methods

Tomczuk

Mazurek

Hemka

et al. 2016

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. This paper presents investigation of methods for reducing light pulsation and plasma temperature inside a high intensity discharge (HID) lamp arc tube. Differences found in light emission of an arc tube plasma channel under different power supply methods are presented and discussed in this work. The novelty of the paper lies in systematical investigation of different power converter supply methods and demonstrating that it has a significant influence on plasma temperature in an arc tube. The tested lamp was powered by electronic ballasts controlled by different algorithms, which forced their current waveform. To compare the results, the authors performed measurements on a discharge lamp powered by a standard electromagnetic ballast. The investigation of plasma parameters is based on the optical spectroscopy method. It was shown that by using the appropriate current shape of a high switching frequency supply converter, the plasma temperature of an HID lamp can be reduced almost by half.Key words: plasma temperature, electronic ballast, electromagnetic ballast, lamp current, light flux, light pulsation, high intensity discharge lamp.Investigation of HID-lamp light emission differences for different power supply methods Therefore, authors decided to perform a research determining the aforementioned parameters of an HID lamp. Plasma theoryPlasma is a source of optical radiation. One of the methods used to examine this state of matter is optical spectroscopy. The spectrum of plasma radiation carries a lot of information about atoms or ions, such as the type of gases used in discharge lamps, and the conditions in which they are located. All the processes taking place in radial plasma can be interpreted as a transition between two different quantum energy states. Processes involving the radiation of electrons and atoms (or ions) occur when an electron moves in an electrical field from one charged particle to another, usually an ion. As a result of its interaction with this particle, part of the path of the electron is curved. The temperature inside the arc tube of a discharge lamp is the parameter that determines the appropriate spectral distribution of the energy emitted by the plasma discharge, and the corresponding luminous efficiency. In the radiation spectrum of an HID lamp, there are a number of lines, characteristic of excited atoms. The shape of the spectral line reveals the conditions (pressure and temperature) prevailing in the discharge lamp. Fig. 1 shows a view of luminous plasma in a cold arc tube, whereas Fig. 2 shows luminous plasma in a hot arc tube.

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Section: Power Supply Methods and The Results Of High-speed Light Intmentioning

confidence: 99%

“…diodes. Their characteristics are described in [8]. er loss reduction methods partially used in control rithms are presented in [9].…”

Section: Measurements Of the Arc Tube Light Intensitymentioning

confidence: 99%

Investigation of HID-lamp light emission differences for different power supply methods

Tomczuk

Mazurek

Hemka

et al. 2016

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…Forward low-bias behavior of ideal Schottky diodes is conventionally characterized by the thermionic emission (TE) equation, [6,7,8,9,10,11,12,13,31,32,33,34,35,36,37,38], ISD≅AnAST2exp(−ΦBn,normalTVth)exp(VSDnVth).…”

Section: Methodsmentioning

confidence: 99%

400 °C Sensor Based on Ni/4H-SiC Schottky Diode for Reliable Temperature Monitoring in Industrial Environments

Draghici

Brezeanu

Pristavu

et al. 2019

Sensors

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This paper presents a high-temperature probe suitable for operating in harsh industrial applications as a reliable alternative to low-lifespan conventional solutions, such as thermocouples. The temperature sensing element is a Schottky diode fabricated on 4H-SiC wafers, with Ni as the Schottky metal, which allows operation at temperatures up to 400 °C, with sensitivities over 2 mV/°C and excellent linearity (R2 > 99.99%). The temperature probe also includes dedicated circuitry for signal acquisition and conversion to the 4 mA–20 mA industrial standard output signal. This read-out circuit can be calibrated for linear response over a tunable temperature detection range. The entire system is designed for full electrical and mechanical compatibility with existing conventional probe casings, allowing for seamless implementation in a factory’s sensor network. Such sensors are tested alongside standard thermocouples, with matching temperature monitoring results, over several months, in real working conditions (a cement factory), up to 400 °C.

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“…Table 1 shows the symbols used for the light sources in this study. 4 shows the luminous flux for 3000 K and 6500 K fluorescent tubes, with power supplied from an electronic ballast with a full-bridge topology with voltage at a frequency of 52 kHz, with SiC diodes [19]. The luminous fluxes recorded by means of a fast photodetector reveal that the respective methods of light emission differ significantly.…”

Section: Light Sources and Power Supply Methodsmentioning

confidence: 99%

Examinations of the methods used to power supply of different light sources and their effect on bioelectrical brain activity

Niemierzycka

Tomczuk

Mikicin

et al. 2018

Neurologia i Neurochirurgia Polska

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The highest activity of brain waves concerns the beta band in the frequency range of 21-22Hz, regardless of the type of the light source (LED, fluorescent tube). The methods used to supply power and color temperature of fluorescent tubes do not significantly affect bioelectrical brain activity during "work", but previous lighting with fluorescent tubes during work has an essential effect on bioelectrical brain activity during rest. Regardless of the color temperature, LED lighting with PWM power supply leads to the highest bioelectrical activity (mainly in the range of 21-22Hz) in the brain during work and rest, which might suggests the usefulness of this method of supplying power for everyday work. Incandescent light does not affect the bioelectrical brain activity during work and rest.

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DC characteristics of the SiC Schottky diodes

Cited by 10 publications

References 8 publications

Investigation of HID-lamp light emission differences for different power supply methods

Investigation of HID-lamp light emission differences for different power supply methods

400 °C Sensor Based on Ni/4H-SiC Schottky Diode for Reliable Temperature Monitoring in Industrial Environments

Examinations of the methods used to power supply of different light sources and their effect on bioelectrical brain activity

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