Design and analysis on a 0.1‐THz second harmonic low‐voltage, low‐current gyrotron with complex cavity

2020 ◽  
Vol 62 (8) ◽  
pp. 2715-2720
Author(s):  
Ling Gu ◽  
Yanyan Zhang ◽  
Yujie Zhang ◽  
Qiao Liu ◽  
Xinjian Niu
Keyword(s):  
Low Voltage ◽  
Second Harmonic ◽  
Complex Cavity

The Feasible Analysis of Transformer Fast Reenergizing with Neutral Point Ungrounded

2013 ◽  
Vol 732-733 ◽  
pp. 958-964
Author(s):  
Yao Zhao ◽  
Yu De Yang ◽  
Yan Hong Pan ◽  
Le Qi
Keyword(s):  
High Voltage ◽  
Power Supply ◽  
Low Voltage ◽  
Second Harmonic ◽  
Neutral Point ◽  
Inrush Current ◽  
Differential Protection ◽  
Time Saving ◽  
Magnetizing Inrush Current ◽  
Transformer Differential Protection

The feasibility of transformer fast reenergizing with neutral point ungrounded after the external fault being removed is analyzed in this paper. By calculating overvoltage and discriminating magnetizing inrush current, it analyzes four ways to restore power of transformer and chooses the optimal strategy which is safe and time-saving. The result shows that in the case of transformer neutral point ungrounded, closing the low-voltage circuit side breaker before the high-voltage, which can effectively limit over-voltage in a safe range. The second harmonic characteristic of magnetizing waveform may disappear, while the intermittent angle characteristics are still significant. With the help of the intermittent angle principle, transformer differential protection may not misuse. The average time for each customer interruption is reduced from 40 minutes to 10 minutes and saves an hour for engineer on the way back and forth. It will greatly improve power supply reliability.

Measuring Residual Stress on the Nanometer Scale - Novel Tools for Fundamental and Applied Research

2012 ◽  
Vol 1424 ◽  
Author(s):  
R. B. Wehrspohn ◽  
M. Krause ◽  
C. Schriever
Keyword(s):  
Low Voltage ◽  
Electron Backscatter Diffraction ◽  
Second Harmonic ◽  
Ion Beam ◽  
High Surface ◽  
Silicon On Insulator ◽  
Target Preparation ◽  
Surface Sensitivity ◽  
Buried Interfaces ◽  
Backscatter Diffraction

ABSTRACTIn the present paper, strain measurements based on second harmonic generation (SHG) and electron backscatter diffraction (EBSD) is demonstrated via two illustrative applications. While SHG gains access to strains in buried interfaces, EBSD can be used to measure strains in crystalline thin films with high spatial resolution on the order of tens of nanometers and high surface sensitivity. In addition, target preparation using low-voltage ion beam milling is demonstrated, gaining access to unstrained sample positions in strained silicon on insulator (sSOI) systems which are necessary for common “pattern-shift” methodologies.

scholarly journals A Single-Chip High-Voltage Integrated Actuator for Biomedical Ultrasound Scanners

Sensors ◽  
2019 ◽  
Vol 19 (23) ◽  
pp. 5063 ◽  
Author(s):  
Hsia ◽  
Hsiao ◽  
Huang
Keyword(s):  
Power Consumption ◽  
High Voltage ◽  
High Speed ◽  
Low Voltage ◽  
Second Harmonic ◽  
Pulse Signal ◽  
Silicon On Insulator ◽  
Imaging Systems ◽  
Output Stage ◽  
Static Power

This article presents a high-voltage (HV) pulse driver based on silicon-on-insulator (SOI) technology for biomedical ultrasound actuators and multi-channel portable imaging systems specifically. The pulse driver, which receives an external low-voltage drive signal and produces high-voltage pulses with a balanced rising and falling edge, is designed by synthesizing high-speed, capacitor-coupled level-shifters with a high-voltage H-bridge output stage. In addition, an on-chip floating power supply has also been developed to simplify powering the entire system and reduce static power consumption. The electrical and acoustic performance of the integrated eight-channel pulse driver has been verified by using medical-grade ultrasound probes to acquire the transmit/echo signals. The driver can produce pulse signals >100 Vpp with rise and fall times within 18.6 and 18.5 ns, respectively. The static power required to support the overall system is less than 3.6 mW, and the power consumption of the system during excitation is less than 50 mW per channel. The second harmonic distortion of the output pulse signal is as low as −40 dBc, indicating that the integrated multi-channel pulse driver can be used in advanced portable ultrasonic imaging systems.

Nonlinear analysis of a 330 GHz second-harmonic low-voltage gyrotron

2015 ◽  
Author(s):  
Xiang-Bo Qi ◽  
Chao-Hai Du ◽  
Li Luo ◽  
Bin Huang ◽  
Zheng-Di Li ◽  
...  
Keyword(s):  
Nonlinear Analysis ◽  
Low Voltage ◽  
Second Harmonic
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