Thematische Bibliographien / Coaxial shunt

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Auswahl der wissenschaftlichen Literatur zum Thema „Coaxial shunt“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 8. Februar 2022

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Zeitschriftenartikel zum Thema "Coaxial shunt"

Baranov, Pavel F., Valeriy N. Borikov und Edvard I. Tsimbalist. „Measurement of the Current Transfer Function for Power Transducers of Current to Voltage“. Applied Mechanics and Materials 756 (April 2015): 615–21. http://dx.doi.org/10.4028/www.scientific.net/amm.756.615.

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Transducers of current to voltage, such as current shunts are widely used in control systems for the mechanical engineering. The shunt is required to determine the value of its resistance on DC and AC currents to determine the transfer ratio error in the wide frequency band in process of verification or calibration. Well-known methods for resistance measuring (by Thompson' double bridge; magnetic comparator, compensation technique, etc.) require a commerce resistance and difficult to implement for shunts with resistance less than 0.1 Ohms. The paper describes a procedure for measuring the complex impedance of transfer ratio of current shunts in the frequency band using the lock-in amplifier with the differential input. The experimental results of the proposed procedure for coaxial shunt with nominal resistance at DC 750 uOhm and 160 uOhm are described.

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Ovsyanikov, V. „Parameter study of ehf dual-band vibrator antennas with coaxial and two-wire shunts“. RADIOFIZIKA I ELEKTRONIKA 26, Nr. 1 (2021): 35–40. http://dx.doi.org/10.15407/rej2021.01.035.

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Subject and Purpose. Two types of new dual-frequency microwave antennas with coaxial and two-wire shunts are considered with a view to improve calculation methods of radio engineering and design parameters of the antennas of the kind. Methods and Methodology. The mathematical methods of equivalent long line and the method of integral equation and optimization of objective functions are used, involving set-point and current values of the voltage standing-wave ratios at the antenna input connectors in the two operating frequency bands. Results. The research and development results have been presented for two variants of dual-frequency (dual-band) vibrator antennas according to whether the shunts are placed inside metal radiating tubes or outside the central conductive rod of the antenna. The shunts are in coaxial and two-wire versions. As applied to the first antenna variant, the method of shunt length optimization upon a minimization of the objective functions yields desired values of antenna electrical parameters (voltage standing-wave ratio, radiation patterns, etc.). For the second antenna variant with both coaxial and two-wire external shunts and provided that the design and operation principle of these antennas are similar, conditions under which the double-frequency mode is possible have been determined for the first time. Conclusion. The proposed method of design and development of tubular dual-frequency vibrator antennas with coaxial shunts has been used to yield a two-frequency circular (elliptical) polarization turnstile antenna as part of sea buoys in the project "Ocean" of the National Space Agency of Ukraine and other spaceborne dual-frequency antennas. The new dual-frequency microstrip antenna discussed in this paper saves us significant drawbacks peculiar to the known dual-frequency antennas and can be used aboard spacecraft and other mobile objects due to its small size.

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Wang, Liangping, Jinhai Zhang, Mo Li, Xinjun Zhang, Chen Zhao und Shaoguo Zhang. „A compact, coaxial shunt current diagnostic for X pinches“. Review of Scientific Instruments 86, Nr. 8 (August 2015): 083508. http://dx.doi.org/10.1063/1.4928067.

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Cha, Hwa-Rang, Kyeong-Mo Kim, Min-Soo Song und Rae-Young Kim. „PCB-Embedded Spiral Pattern Pick-Up Coil Current Sensor for WBG Devices“. Energies 13, Nr. 21 (02.11.2020): 5747. http://dx.doi.org/10.3390/en13215747.

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This paper proposes a current sensor for wide bandgap (WBG) devices. The current of a power semiconductor device is mainly measured using a Rogowski coil, an active current transformer, and a coaxial shunt resistor. The Rogowski coil and active current transformer are not suitable for the current measurement of surface mount WBG devices due to their operating principle. The coaxial shunt resistor causes parasitic inductance. Since WBG devices are more sensitive to parasitic inductance than silicon devices, parasitic inductance may affect circuit operation. To overcome these problems, this paper proposes a printed circuit board (PCB)-embedded spiral pattern pick-up coil current measurement for WBG devices. The proposed pick-up coil has high mutual inductance compared to the conventional pick-up coil, so the measurement sensitivity is high. In addition, there is no need for additional processing outside the PCB. Experimental results using a double pulse tester circuit are provided to verify the performance of the proposed current sensor.

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Kuzminskaya, E. V., und E. I. Tsimbalist. „The improvement of the dynamic characteristics of a coaxial shunt“. Instruments and Experimental Techniques 60, Nr. 1 (Januar 2017): 54–57. http://dx.doi.org/10.1134/s002044121606018x.

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Malinowski, Maciej, Krzysztof Kubiczek und Marian Kampik. „A precision coaxial current shunt for current AC-DC transfer“. Measurement 176 (Mai 2021): 109126. http://dx.doi.org/10.1016/j.measurement.2021.109126.

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Moran, P., G. Jean Francois, A. Gibert und P. Pignolet. „Coaxial shunt intended for transient current measurement in a pseudospark switch“. IEE Proceedings - Science, Measurement and Technology 143, Nr. 2 (01.03.1996): 119–24. http://dx.doi.org/10.1049/ip-smt:19960025.

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Liu, Hongfei, und Sander Weinreb. „Ultra-low-loss high-pass filter with air-core short-circuit coaxial cable“. International Journal of Microwave and Wireless Technologies 9, Nr. 9 (05.07.2017): 1817–20. http://dx.doi.org/10.1017/s1759078717000721.

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This paper presents a novel ultra-low-loss high-pass filter with 3 dB cutoff frequency of 890 MHz for astronomical receiver radio frequency interference mitigation application. The filter consists of three series capacitors, four shunt inductors, and microstrip circuit board. Specially, 4 shunt inductors are actualized by fabricating air-core short-circuit coaxial cable inductors in the filter box body, and the quality factor of these cable inductors is up to 762.2 and 1046, respectively, at 1.4 GHz. In the expected passband of 1.1–1.9 GHz, S parameters measurement show that insertion loss is lower than 0.16 dB and two-port return loss is larger than 20 dB; noise measurement show that filter noise temperature is lower than 8 at 300 K ambient temperature. Noise sources of this filter are analyzed by simulation and measurement.

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Vdovychenko, A., und J. Tuz. „Active Power Measurement Accuracy Increasing by Additional Measurement of Shunt Voltage“. Metrology and instruments, Nr. 3 (07.03.2018): 11–16. http://dx.doi.org/10.33955/2307-2180(3)2018.11-16.

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The broadband transfer power wattmeter with the correction of the own consumption error for measuring the active power against the background of large reactive components in the radio frequency range is considered in article. The objects of research are electromagnetic elements (chokes / transformers), operating at high frequencies and have strongly distorted forms of signals. When measuring at high frequencies, the channels of the wattmeter become very sensitive to phase errors. It is necessary to minimize links that cause phase shifts. In this connection, it is important to correctly construct the input units of the wattmeter and to make such a transformation, which will provide operations with signal rms valueswithout links phase shifts. The proposed scheme allows this to be achieved, and required gain is carried out without taking into account the phase shift of the signals. In the basic scheme of the wattmeter(fig. 1), the input device is executed from the main shunt and parallel to the auxiliary distributed shunt connected to it, which is connected to the main resistance of the voltage divider, in which the value of all resistances of the input device is determined by conditions of invariance to the squares of the voltage and load current , and the partially distributed auxiliary shunt is calculated with additional weighting factors to provide the conditions for invariance of the squared of voltage and current and eliminate the error from its own revives. Features of the construction of the input link of the wattmeter of transfer power with additional measurement of shunt voltage are given in the article(fig.2). Active power with taking into account the influence of the shunt reactive component calculation formulas (7)-(14)is presented. The basic error of the wattmeter is the error of the low-ohm shunt. It is expedient to use coaxial or triaxial shunts to extend the frequency range. Transfer power wattmeter input link, which contains additional measurement of shunt voltage simulations was performed in the article(fig.3and table 1). The advantages of such wattmeter are: possibility to expand the frequency range by taking into account shunt resistance reactive component influence on the measurement final result , which can be achieved not only by hardware (shunt inductance reduction), but also the introduction of the calculated correction after measuring the values of the shunt active and reactive component; the values of the input device elements can be optimized by the criterion of maximum broadband, since the error from own consumption is taken into account; in the scheme one low-level shunt is used, which reduces the cost of the wattmeter; additive errors of the voltage conversion channel are minimized.

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Voljc, Bostjan, Matjaz Lindic und Rado Lapuh. „Direct Measurement of AC Current by Measuring the Voltage Drop on the Coaxial Current Shunt“. IEEE Transactions on Instrumentation and Measurement 58, Nr. 4 (April 2009): 863–67. http://dx.doi.org/10.1109/tim.2008.2007074.

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Dissertationen zum Thema "Coaxial shunt"

Mašláň, Stanislav. „Metody přesného měření nízkých impedancí“. Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-445376.

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Overall topic of presented thesis is development of methods of measurement of low impedances below 10 Ohm in a frequency range up to 1 MHz. The thesis comprises of three main parts. First part of thesis describes design of unique and simple calculable standards of resistance that are used for calibration of the bridge and as the reference standards for the calibrations. Next part of theses is focused on design of digital sampling bridge in various topologies suitable for measurement of various types of impedance standards up to frequency of 1 MHz. The thesis describes the HW components, data processing and corrections scheme allowing the designed bridge to reach expanded uncertainties (k=2) below 0.005% and 250 µrad at 1 MHz. One of the key points of the proposed corrections scheme is unique automatic linearity calibration method requiring minimal operator's effort. The theses also describes integration of Spice model of the bridge the bridge SW that allowed validation of functionality of the bridge and also analysis of uncertainty contributions related to interferences between the bridge components. The last part of the thesis shows selection of measurements of known impedances and international comparisons that proofs performance of the bridge.

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Bücher zum Thema "Coaxial shunt"

Sabri, Saher S. Recanalization of Occluded TIPS Using a Transhepatic Percutaneous Technique. Herausgegeben von S. Lowell Kahn, Bulent Arslan und Abdulrahman Masrani. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780199986071.003.0080.

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Transjugular intrahepatic portosystemic shunt (TIPS) dysfunction rates have significantly decreased since the introduction of stent grafts. However, TIPS occlusion remains a recognized complication, especially when bare-metal stents are used or when the cephalad end of the stent does not extend into the inferior vena cava (IVC). Antegrade recanalization of the occluded TIPS can be routinely achieved using a coaxial or a triaxial sheath system, which provides sufficient stability and pushability to recanalize the TIPS. However, occasionally this cannot be achieved due to the difficult angulation between the IVC and the hepatic vein, poor placement of the initial TIPS short of the IVC, or long-standing occlusion of the TIPS. Retrograde recanalization of the TIPS by transhepatic percutaneous access of the TIPS using a 21 gauge needle can be performed in such situations.

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Konferenzberichte zum Thema "Coaxial shunt"

Jiangtao Zhang, Xianlin Pan, Hongtao Huang, Lei Wang und Deshi Zhang. „A coaxial ac shunt with calculable ac-dc difference“. In 2010 Conference on Precision Electromagnetic Measurements (CPEM 2010). IEEE, 2010. http://dx.doi.org/10.1109/cpem.2010.5544753.

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Malinowski, Maciej, Krzysztof Kubiczek, Marian Kampik, Krzysztof Musiol, Michal Grzenik, Kordian Dudzik und Wieslaw Domanski. „A Precision Coaxial Low-Current Shunt with Improved Mathematical Model“. In 2021 13th International Conference on Measurement. IEEE, 2021. http://dx.doi.org/10.23919/measurement52780.2021.9446834.

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Sanoh, M., A. Mikata, K. Tokuno, M. Hanazawa und H. Kakitani. „A calibration method for a commercial coaxial shunt at high pulse current“. In 2014 Conference on Precision Electromagnetic Measurements (CPEM 2014). IEEE, 2014. http://dx.doi.org/10.1109/cpem.2014.6898543.

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Zhang, Wen, Zheyu Zhang und Fred Wang. „Review and Bandwidth Measurement of Coaxial Shunt Resistors for Wide-Bandgap Devices Dynamic Characterization“. In 2019 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2019. http://dx.doi.org/10.1109/ecce.2019.8912750.

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Voljc, Bostjan, und Mag Matjaz Lindic. „Measurement of AC current with coaxial current shunts“. In 2008 Conference on Precision Electromagnetic Measurements (CPEM 2008). IEEE, 2008. http://dx.doi.org/10.1109/cpem.2008.4574892.

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Pogliano, U., G. C. Bosco und D. Serazio. „Coaxial shunts for the ac-dc transfer standards of current“. In 2008 Conference on Precision Electromagnetic Measurements (CPEM 2008). IEEE, 2008. http://dx.doi.org/10.1109/cpem.2008.4574637.

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Voljc, B., M. Lindic, B. Pinter, M. Kokalj, Z. Svetik und R. Lapuh. „New design of coaxial current shunts for 50 A and 100 A“. In 2012 Conference on Precision Electromagnetic Measurements (CPEM 2012). IEEE, 2012. http://dx.doi.org/10.1109/cpem.2012.6250882.

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Bedareva, E. V., E. I. Tsimbalist, A. A. Epifanova und N. A. Gavrilenko. „Consideration of complementary error during design of the alternating current coaxial shunts“. In 2015 International Conference on Mechanical Engineering, Automation and Control Systems (MEACS). IEEE, 2015. http://dx.doi.org/10.1109/meacs.2015.7414948.

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Milicevic, Andrija, und Petar Mostarac. „Simulated Annealing Characterization of Equivalent Circuit Models for Precision Coaxial Current Shunts“. In 2019 2nd International Colloquium on Smart Grid Metrology (SMAGRIMET). IEEE, 2019. http://dx.doi.org/10.23919/smagrimet.2019.8720353.

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Voljc, B., M. Lindic, B. Pinter, Z. Svetik und R. Lapuh. „Direct measurement of AC current with coaxial current shunts down to 1 mA“. In 2010 Conference on Precision Electromagnetic Measurements (CPEM 2010). IEEE, 2010. http://dx.doi.org/10.1109/cpem.2010.5543613.

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