(Invited) The Stability of High Voltage AlGaN/GaN HEMTs

2015 ◽  
Vol 66 (7) ◽  
pp. 127-137
Author(s):  
C.-F. Huang ◽  
T.-F. Chang ◽  
Y.-H. Wang ◽  
Y. C. Liang
Keyword(s):  
High Voltage ◽  
Gan Hemts ◽  
The Stability

Study on Selective Leakage Protection System of Mine High Voltage Grid Based on Harmonic Phase Comparison

2015 ◽  
Vol 9 (1) ◽  
pp. 253-262
Author(s):  
Liu Zhongfu ◽  
Zhang Junxing ◽  
Shi Lixin ◽  
Yang Yaning
Keyword(s):  
High Voltage ◽  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Neutral Point ◽  
Arc Suppression Coil ◽  
Zero Sequence ◽  
Harmonic Extraction ◽  
Power Direction ◽  
The Stability

As for the wide application of arc suppression coil to the grounding in neutral point of mine high voltage grid, grid leakage fault rules and harmonic characteristics of the neutral point grounding system through arc suppression coil are analyzed, the selective leakage protection program “zero-sequence voltage starts, fifth harmonics of grid zerosequence voltage and zero-sequence current are extracted for phase comparison” is proposed, and corresponding fifth harmonic extraction circuit and power direction discrimination circuit are designed. The experimental results show that the protective principle applies not only to the neutral point insulated power supply system, but also to the power supply system in which neutral point passes arc suppression coil, which can solve selective leakage protection problems under different neutral grounding ways, improving the reliability of selective leakage and guaranteeing the stability of the action value.

A Drain–Source Connection Technique: Thermal Resistance Measurement Method for GaN HEMTs Using TSEP at High Voltage

2020 ◽  
Vol 67 (12) ◽  
pp. 5454-5459
Author(s):  
Xuan Li ◽  
Shiwei Feng ◽  
Chang Liu ◽  
Yamin Zhang ◽  
Kun Bai ◽  
...  
Keyword(s):  
Thermal Resistance ◽  
High Voltage ◽  
Measurement Method ◽  
Resistance Measurement ◽  
Gan Hemts

scholarly journals Demulsification of Liquid Membrane Emulsion using High Voltage Glass Coated Electrode in Batch System

2017 ◽  
Vol 10 (1) ◽  
Author(s):  
N. Othman ◽  
A. Ahmad ◽  
M. A. Piramali
Keyword(s):  
High Voltage ◽  
Liquid Membrane ◽  
Alternate Current ◽  
Cost Effective ◽  
Electrical Field ◽  
Electrical Field Strength ◽  
Oil Emulsion ◽  
Internal Phase ◽  
The Stability ◽  
Time Required

Demulsification is one of the key processes in emulsion liquid membrane application. This study involved the effect of electrical field on demulsification of water in oil using batch high voltage demulsifier system. This technique widely used because of its advantages of easy manipulation of applied field direction and strength, offers cost–effective separation and minimal environmental impact combined with mechanical simplicity. Influence of various values of frequency (400–1500 Hz) and voltage was studied experimentally using Alternate Current (AC) High Voltage Demulsifier with insulated electrode. The emulsion consists of kerosene as organic phase, sulfuric acid as internal phase and span 80 (3 and 5 w/v %) as a surfactant. The effect of emulsion preparation such as homogenizer speed, internal phase and surfactant concentrations on the stability of water–in–oil emulsion was also investigated. The results showed that the attractive forces between the water droplets under an electrical field increase by raising the applied electrical field strength. Meanwhile, the time required for the emulsion to separate and coalescence under electrical field increased when the stability of emulsion increased.

Breakdown behaviour of high-voltage GaN-HEMTs

2015 ◽  
Vol 55 (9-10) ◽  
pp. 1682-1686 ◽  
Author(s):  
W. Saito ◽  
T. Suwa ◽  
T. Uchihara ◽  
T. Naka ◽  
T. Kobayashi
Keyword(s):  
High Voltage ◽  
Gan Hemts

Enhancing the stability of high-voltage lithium-ion battery by using sulfur-containing electrolyte additives

Ionics ◽  
2019 ◽  
Vol 25 (4) ◽  
pp. 1447-1457 ◽  
Author(s):  
Xiaoying Yu ◽  
Yamin Wang ◽  
Hao Cai ◽  
Chao Shang ◽  
Yingchun Liu ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
High Voltage ◽  
Lithium Ion ◽  
Electrolyte Additives ◽  
The Stability ◽  
Sulfur Containing
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