A method to eliminate birefringence of a magneto-optic AC current transducer with glass ring sensor head

1998 ◽  
Vol 13 (4) ◽  
pp. 1015-1019 ◽  
Author(s):  
Xianyun Ma ◽  
Chengmu Luo
Keyword(s):  
Sensor Head ◽  
Current Transducer ◽  
Ac Current ◽  
Magneto Optic

scholarly journals Improved 3-Phase Current Transducer

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 1070 ◽  
Author(s):  
Pavel Ripka ◽  
Václav Grim ◽  
Andrey Chirtsov
Keyword(s):  
Temperature Coefficient ◽  
Temperature Stability ◽  
Complete Suppression ◽  
Phase Current ◽  
Field Gradients ◽  
Current Transducer ◽  
Magnetoresistive Sensors ◽  
Ac Current ◽  
Current Lines

We propose improved contactless DC/AC current transducer for 3-phase current lines based on 8 integrated fluxgate sensors. Using proper processing we ideally achieve a complete suppression of external homogeneous fields, and field gradients up to the 4th order. The sensitivity to external currents (crosstalk) is improved 15-times compared to [1]. The usage of micro fluxgate sensors instead of magnetoresistive sensors improves the temperature stability: the sensitivity temperature coefficient was reduced from 0.3%/K to 50 ppm/K and offset drift was reduced from 50 mA/K to 1 mA/K.

A magneto-optic current transducer

1990 ◽  
Vol 5 (2) ◽  
pp. 548-555 ◽  
Author(s):  
T.W. Cease ◽  
P. Johnston
Keyword(s):  
Current Transducer ◽  
Magneto Optic

DC-AC Current Source Converter Using Coupled Inductor

2013 ◽  
Vol 133 (10) ◽  
pp. 978-985
Author(s):  
Katsutoshi Yamanaka ◽  
Hidenori Hara ◽  
Sadao Ishii ◽  
Tsuneo Kume ◽  
Masahito Shoyama
Keyword(s):  
Current Source ◽  
Current Source Converter ◽  
Ac Current

Single-Phase AC-AC Current Source Converter with Improved Performance

2015 ◽  
Vol 135 (12) ◽  
pp. 1237-1238
Author(s):  
Yasuhiko Neba ◽  
Hirokazu Matsumoto ◽  
Yuta Kawasaki
Keyword(s):  
Single Phase ◽  
Current Source ◽  
Current Source Converter ◽  
Ac Current ◽  
Improved Performance

Polarizability and nonpolarizability of oil-water interfaces with relevance to a.c. impendance measurements

1991 ◽  
Vol 56 (1) ◽  
pp. 112-129 ◽  
Author(s):  
Takashi Kakiuchi ◽  
Mitsugi Senda
Keyword(s):  
Charge Transfer ◽  
Numerical Calculation ◽  
Supporting Electrolyte ◽  
Water Interface ◽  
Migration Effect ◽  
Ac Current ◽  
Stationary Interface ◽  
Oil Water ◽  
Anion Transfer

We have estimated the degree of polarizability of a polarized oil-water interface used as a working interface and that of the nonpolarizability of a nonpolarized interface used as a reference oil-water interface from the numerical calculation of dc and ac current vs potential behavior at both interfaces. Theoretical equations of dc and ac currents for simultaneous cation and anion transfer of supporting electrolytes have been derived for the planar stationary interface for reversible and quasi-reversible cases. In the derivation, the migration effect and the coupling of the cation and anion transfer have been incorporated. The transfer of ions constituting a supporting electrolyte contributes to the total admittance of the interface even in the region where the interface may be considered as polarized in dc sense, as pointed out first by Samec et al. (J. Electroanal. Chem. 126, 121 (1981)). Moreover, the reference oil-water interface is not ideally reversible, so that the contribution from this interface to the measured admittance cannot be negligible, unless the area of the reference oil-water interface is much larger than that of the working oil-water interface. The effect of non-ideality of the reference oil-water interface on the determination of double layer capacitances and kinetic parameters of charge transfer at the working oil-water interface has been estimated.

scholarly journals Electrode and electrolyte configurations for low frequency motion energy harvesting based on reverse electrowetting

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Pashupati R. Adhikari ◽  
Nishat T. Tasneem ◽  
Russell C. Reid ◽  
Ifana Mahbub
Keyword(s):  
Energy Harvesting ◽  
Bias Voltage ◽  
Energy Harvester ◽  
Superior Performance ◽  
Maximum Output ◽  
Electrowetting On Dielectric ◽  
External Bias ◽  
Motion Energy ◽  
Ac Current ◽  
Self Powered

AbstractIncreasing demand for self-powered wearable sensors has spurred an urgent need to develop energy harvesting systems that can reliably and sufficiently power these devices. Within the last decade, reverse electrowetting-on-dielectric (REWOD)-based mechanical motion energy harvesting has been developed, where an electrolyte is modulated (repeatedly squeezed) between two dissimilar electrodes under an externally applied mechanical force to generate an AC current. In this work, we explored various combinations of electrolyte concentrations, dielectrics, and dielectric thicknesses to generate maximum output power employing REWOD energy harvester. With the objective of implementing a fully self-powered wearable sensor, a “zero applied-bias-voltage” approach was adopted. Three different concentrations of sodium chloride aqueous solutions (NaCl-0.1 M, NaCl-0.5 M, and NaCl-1.0 M) were used as electrolytes. Likewise, electrodes were fabricated with three different dielectric thicknesses (100 nm, 150 nm, and 200 nm) of Al2O3 and SiO2 with an additional layer of CYTOP for surface hydrophobicity. The REWOD energy harvester and its electrode–electrolyte layers were modeled using lumped components that include a resistor, a capacitor, and a current source representing the harvester. Without using any external bias voltage, AC current generation with a power density of 53.3 nW/cm2 was demonstrated at an external excitation frequency of 3 Hz with an optimal external load. The experimental results were analytically verified using the derived theoretical model. Superior performance of the harvester in terms of the figure-of-merit comparing previously reported works is demonstrated. The novelty of this work lies in the combination of an analytical modeling method and experimental validation that together can be used to increase the REWOD harvested power extensively without requiring any external bias voltage.

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