A novel high frequency current-driven synchronous rectifier for low voltage high current applications

2002 ◽  
Author(s):  
Xuefei Xie ◽  
J.C.P. Liu ◽  
F.N.K. Poon ◽  
Man Hay Pong
Keyword(s):  
High Frequency ◽  
Low Voltage ◽  
High Current ◽  
High Frequency Current ◽  
Synchronous Rectifier ◽  
Frequency Current

scholarly journals A Novel Differential High-Frequency Current Transformer Sensor for Series Arc Fault Detection

Sensors ◽  
2019 ◽  
Vol 19 (17) ◽  
pp. 3649 ◽  
Author(s):  
Guanghai Bao ◽  
Xiaoqing Gao ◽  
Run Jiang ◽  
Kai Huang
Keyword(s):  
Fault Detection ◽  
High Frequency ◽  
Low Voltage ◽  
Fault Simulation ◽  
Electrical Equipment ◽  
Current Transformer ◽  
Frequency Noise ◽  
Sensor Output ◽  
High Frequency Current ◽  
Frequency Current

Fault arc detection is an important technology to ensure the safe operation of electrical equipment and prevent electrical fires. The high-frequency noise of the arc current is one of the typical arc characteristics of almost all loads. In order to accurately detect arc faults in a low-voltage alternating-current (AC) system, a novel differential high-frequency current transformer (D-HFCT) sensor for collecting high-frequency arc currents was proposed. The sensitivity and frequency band of the designed sensor were verified to ensure that the acquisition requirements of the high-frequency current were satisfied. A series arc fault simulation experiment system was built, and resistive, inductive, and non-linear load and high-power shielding load experiments were carried out. Experiments showed that the sensor output signal was close to zero in the non-arc state, and the sensor output response was a high-frequency glitch in the arc state. The results were consistent for different loads, and the discrimination between normal and fault states was obvious, which proved that the sensor is suitable for series arc fault detection.

scholarly journals Fracture of a gas pipeline manufactured by high frequency current welding

2021 ◽  
Vol 1023 ◽  
pp. 012003
Author(s):  
A A Alexeev ◽  
A S Syromyatnikova ◽  
A M Bolshakov ◽  
A R Ivanov
Keyword(s):  
High Frequency ◽  
Gas Pipeline ◽  
High Frequency Current ◽  
Frequency Current
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