Voltage measurement in a gap in a toroidal cavity in the meter range

1968 ◽  
Vol 11 (5) ◽  
pp. 104-105
Author(s):  
L. G. Kositsyn ◽  
N. A. Lashuk ◽  
B. A. Ryzhkov ◽  
B. A. Solntsev
Keyword(s):  
Voltage Measurement ◽  
Toroidal Cavity

Current Zero at Prospective Transient Recovery Voltage Measurement

2016 ◽  
Vol 136 (2) ◽  
pp. 170-174 ◽  
Author(s):  
Tadashi Koshizuka ◽  
Yasuhiko Taniguchi ◽  
Eiichi Haginomori ◽  
Hisatoshi Ikeda ◽  
Keisuke Udagawa
Keyword(s):  
Voltage Measurement ◽  
Transient Recovery Voltage ◽  
Recovery Voltage ◽  
Current Zero

Prospective Transient Recovery Voltage Measurement of Short Circuit Testing Circuit by Reverse Current Injection

2019 ◽  
Vol 139 (8) ◽  
pp. 522-526
Author(s):  
Kyoya Nonaka ◽  
Tadashi Koshizuka ◽  
Eiichi Haginomori ◽  
Hisatoshi Ikeda ◽  
Takeshi Shinkai ◽  
...  
Keyword(s):  
Short Circuit ◽  
Reverse Current ◽  
Current Injection ◽  
Voltage Measurement ◽  
Circuit Testing ◽  
Transient Recovery Voltage ◽  
Recovery Voltage

scholarly journals New Sensor for Medium- and High-Voltage Measurement

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4654
Author(s):  
Andrzej Wetula ◽  
Andrzej Bień ◽  
Mrunal Parekh
Keyword(s):  
Finite Element Method ◽  
Electronic Devices ◽  
Finite Element Method Simulation ◽  
Laboratory Model ◽  
Power Electronic ◽  
Proof Of Concept ◽  
Voltage Measurement ◽  
Medium Voltage ◽  
Narrow Frequency Band ◽  
Further Development

Measurements of medium and high voltages in a power grid are normally performed with large and bulky voltage transformers or capacitive dividers. Besides installation problems, these devices operate in a relatively narrow frequency band, which limits their usability in modern systems that are saturated with power electronic devices. A sensor that can be installed directly on a wire and can operate without a galvanic connection to the ground may be used as an alternative voltage measurement device. This type of voltage sensor can complement current sensors installed on a wire, forming a complete power acquisition system. This paper presents such a sensor. Our sensor is built using two dielectric elements with different permeability coefficients. A finite element method simulation is used to estimate the parameters of a constructed sensor. Besides simulations, a laboratory model of a sensor was built and tested in a medium-voltage substation. Our results provide a proof of concept for the presented sensor. Some errors in voltage reconstruction have been traced to an oversimplified data acquisition and transmission system, which has to be improved during the further development of the sensor.

scholarly journals Design of a Modular Battery Management System for Electric Motorcycle

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3532
Author(s):  
Hung-Cheng Chen ◽  
Shin-Shiuan Li ◽  
Shing-Lih Wu ◽  
Chung-Yu Lee
Keyword(s):  
Temperature Measurement ◽  
Management System ◽  
Battery Management System ◽  
Battery Management ◽  
Voltage Measurement ◽  
Mixed Signal ◽  
Discharge Temperature ◽  
Charging Current ◽  
Battery Module ◽  
Signal Processor

This paper proposes a modular battery management system for an electric motorcycle. The system not only can accurately measure battery voltage, charging current, discharging current, and temperature but also can transmit the data to the mixed-signal processor for battery module monitoring. Moreover, the system can control the battery balancing circuit and battery protection switch to protect the battery module charging and discharging process safety. The modular battery management system is mainly composed of a mixed-signal processor, voltage measurement, current measurement, temperature measurement, battery balancing, and protection switch module. The testing results show that the errors between the voltage value measured by the voltage measurement module and the actual value are less than 0.5%, about 1% under the conditions of different charging and discharging currents of 9 A and 18 A for the current measuring module, less than 1% for the temperature measurement module; and the battery balancing in the battery management system during the charging process. When the module is charged at 4.5 A for about 805 s, each cell of the battery has reached the balancing state. Finally, the testing results validate that the modular battery management system proposed in this paper can effectively manage the battery balancing of each cell in the battery module, battery module overcharge, over-discharge, temperature protection, and control.

scholarly journals Hysteresis Analysis of Hole-Transport-Material-Free Monolithic Perovskite Solar Cells with Carbon Counter Electrode by Current Density–Voltage and Impedance Spectra Measurements

Nanomaterials ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 48
Author(s):  
Syed Afaq Ali Shah ◽  
Muhammad Hassan Sayyad ◽  
Jinghua Sun ◽  
Zhongyi Guo
Keyword(s):  
Time Delay ◽  
Current Density ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Impedance Spectra ◽  
Voltage Measurement ◽  
Sweep Time ◽  
Measurement Protocol ◽  
A Current

Due to the tremendous increase in power conversion efficiency (PCE) of organic–inorganic perovskite solar cells (PSCs), this technology has attracted much attention. Despite being the fastest-growing photovoltaic technology to date, bottlenecks such as current density–voltage (J–V) hysteresis have significantly limited further development. Current density measurements performed with different sweep scan speeds exhibit hysteresis and the photovoltaic parameters extracted from the current density–voltage measurements for both scan directions become questionable. A current density–voltage measurement protocol needs to be established which can be used to achieve reproducible results and to compare devices made in different laboratories. In this work, we report a hysteresis analysis of a hole-transport-material-free (HTM-free) carbon-counter-electrode-based PSC conducted by current density–voltage and impedance spectra measurements. The effect of sweep scan direction and time delay was examined on the J–V characteristics of the device. The hysteresis was observed to be strongly sweep scan direction and time delay dependent and decreased as the delay increased. The J–V analysis conducted in the reverse sweep scan direction at a lower sweep time delay of 0.2 s revealed very large increases in the short circuit current density and the power conversion efficiency of 57.7% and 56.1%, respectively, compared with the values obtained during the forward scan under the same conditions. Impedance spectroscopy (IS) investigations were carried out and the effects of sweep scan speed, time delay, and frequency were analyzed. The hysteresis was observed to be strongly sweep scan direction, sweep time delay, and frequency dependent. The correlation between J–V and IS data is provided. The wealth of photovoltaic and impendence spectroscopic data reported in this work on the hysteresis study of the HTM-free PSC may help in establishing a current density–voltage measurement protocol, identifying components and interfaces causing the hysteresis, and modeling of PSCs, eventually benefiting device performance and long-term stability.

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