High-voltage-input, low-voltage-output, series-connected converters with uniform voltage distribution

2009 ◽  
Author(s):  
K. Siri ◽  
M. Willhoff ◽  
Haibing Hu ◽  
I. Batarseh
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
Voltage Distribution ◽  
Voltage Output

A scalable strategy toward compliant tandem yarn-shaped supercapacitors with high voltage output

2021 ◽  
Author(s):  
Juan Zhang ◽  
Qingli Xu ◽  
Xiangyu Qian ◽  
Xinhou Wang ◽  
Kun Zhang
Keyword(s):  
High Voltage ◽  
Aqueous Electrolyte ◽  
Low Voltage ◽  
Voltage Output ◽  
In Series

Yarn-shaped supercapacitors (YSSCs) based on aqueous electrolyte exhibit relatively low voltage output due to the low decomposition voltage of water (~1.23 V). Applying organic-based electrolyte or connecting YSSCs in series...

Research on the Pizeoelectric Driving Micro-Flux Valve Power Supply

2011 ◽  
Vol 58-60 ◽  
pp. 727-732
Author(s):  
Hai Chu Chen ◽  
Rui Hua Zhang ◽  
Gen Liang Xiong ◽  
Fa Yun Liang ◽  
Ling Teng Liu
Keyword(s):  
High Voltage ◽  
Power Supply ◽  
Low Voltage ◽  
Piezoelectric Ceramics ◽  
Driving Voltage ◽  
Small Signal ◽  
Precise Control ◽  
Wave Characteristics ◽  
Voltage Output ◽  
Output Characteristics

In order to decrease output micro-flux ripple wave characteristics of the piezoelectric driven micro-flux valve, it carried out research on piezoelectric ceramics driving power supply. In the research, it especially designed the low-voltage and high-voltage stabilizing circuit, small signal amplifying circuit and power amplifying circuit. By applying the power supply, the function signal would be amplified to a high-voltage output to drive the piezoelectric ceramics stack (PZT) to control displacement of the micro-flux valve’s spool, and then realize precise control the micro-flux of the valve. At last, it carried out experimentations on the output characteristics of the power supply, and the experimental results proved the output signal of the power supply have excellent input-output linearity and small ripple wave characteristics, and the high-voltage output ripple wave error is less than 10mV. More over, it used the power supply to drive an 8×8×20mm PZT with capacitance 2.3, and measured the quickly discharging characteristics. The results prove the quickly discharging time is only 10.10ms when the driving voltage is 180V, which means the power supply has excellent quickly discharging characteristics.

scholarly journals Investigation on the Resonant Oscillations in an 11 kV Distribution Transformer under Standard and Chopped Lightning Impulse Overvoltages with Different Shield Placement Configurations

Energies ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1466 ◽  
Author(s):  
Murthy ◽  
Azis ◽  
Yousof ◽  
Jasni ◽  
Othman ◽  
...  
Keyword(s):  
Equivalent Circuit ◽  
High Voltage ◽  
Low Voltage ◽  
Stress Distributions ◽  
Voltage Distribution ◽  
Distribution Transformer ◽  
Resonant Oscillation ◽  
Initial Voltage ◽  
Transformer Winding ◽  
Lightning Impulse

This paper presents an investigation on the resonant oscillations of an 11 kV layer-type winding transformer under standard and chopped lightning impulse overvoltage conditions based on calculated parameters. The resistances, inductances and capacitances were calculated in order to develop the transformer winding equivalent circuit. The impulse overvoltages were applied to the high voltage (HV) winding and the resonant oscillations were simulated for each of the layers based on different electrostatic shield placement configurations. It is found that the placement of grounded shields between layer 13 and layer 14 results in the highest resonant oscillation and non-linear initial voltage distribution. The oscillation and linear stress distributions are at the lowest for shield placement between the HV and low voltage (LV) windings.

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