Series connected soft switched IGBTs for high power, high voltage drives applications: experimental results

Multilevel converters tender advantages in terms of the output waveform quality due to the increased number of levels used in the output voltage modulation and have been widely accepted for high-power high-voltage applications. This paper introduces topology in multilevel dc link inverter (MLDCLI), which can significantly reduce the switch count and improve the performance. The preferred topology provides a dc voltage with the shape of a staircase approximating the rectified shape of a commanded sinusoidal wave, to the bridge inverter, which in turn gives the required alternating waveform. This topology requires fewer components compared to traditional Multi level Inverters (MLI).Therefore, the overall cost and complexity are significantly reduced particularly for higher output voltage levels. Finally, Matlab/Simulink and XILINX are used as a simulation and compiler architecture of control circuit embedded in FPGA. Simulation and experimental results for fifteen-level inverter are presented for validation.

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Development and testing of a high voltage direct converter for high power RF applications

IET Pulsed Power Symposium 2006 ◽

10.1049/ic:20060095 ◽

2006 ◽

Cited By ~ 2

Author(s):

D.J. Cook ◽

J.C. Clare ◽

P.W. Wheeler

Keyword(s):

High Voltage ◽

High Power ◽

Rf Applications

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Opto-mechanical modeling and experimental implementation of an FBG-based piezoelectric bimorph actuator for high voltage sensing applications

Journal of Intelligent Material Systems and Structures ◽

10.1177/1045389x211028299 ◽

2021 ◽

pp. 1045389X2110282

Author(s):

Raúl E Jiménez ◽

José P Montoya ◽

Rodrigo Acuna Herrera

Keyword(s):

High Voltage ◽

Good Accuracy ◽

Correction Term ◽

Experimental Results ◽

Mechanical Modeling ◽

Piezoelectric Bimorph ◽

Linear Strain ◽

Voltage Sensing ◽

Sensing Applications ◽

Experimental Implementation

This paper proposes a highly simplified optical voltage sensor by using a piezoelectric bimorph and a Fiber Bragg Grating (FBG) that can be used for high voltage applications with a relatively good accuracy and stability. In this work the theoretical framework for the whole opto-mechanical operation of the optical sensor is detailed and compared to experimental results. In the analysis, a correction term to the electric field is derived to account for the linear strain distribution across the piezoelectric layer improving the designing equations and giving more criteria for future developments. Finally, some experimental results from a laboratory scale optical-based high voltage sensing setup are discussed, and shown to be in excellent agreement with theoretical expected behavior for different voltage magnitudes.

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Research on insulation protection of high voltage and high power confluence structure of aerospace based on electric field simulation

2021 International Conference on Electronics, Circuits and Information Engineering (ECIE) ◽

10.1109/ecie52353.2021.00010 ◽

2021 ◽

Author(s):

Zhang Yu ◽

Zhang Guoshuai ◽

Wu Jianchao ◽

Pei Xingzheng

Keyword(s):

Electric Field ◽

High Voltage ◽

High Power ◽

Field Simulation

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High Power Impulse Magnetron Sputtering of In2O3/Sn Cold Sprayed Composite Target

Materials ◽

10.3390/ma14051228 ◽

2021 ◽

Vol 14 (5) ◽

pp. 1228

Author(s):

Marcin Winnicki ◽

Artur Wiatrowski ◽

Michał Mazur

Keyword(s):

Thin Films ◽

Magnetron Sputtering ◽

High Voltage ◽

High Power ◽

Power Supply ◽

Indium Tin Oxide ◽

Volume Ratio ◽

Cold Spraying ◽

High Voltage Power Supply ◽

Composite Target

High Power Impulse Magnetron Sputtering (HiPIMS) was used for deposition of indium tin oxide (ITO) transparent thin films at low substrate temperature. A hybrid-type composite target was self-prepared by low-pressure cold spraying process. Prior to spraying In2O3 and oxidized Sn powders were mixed in a volume ratio of 3:1. Composite In2O3/Sn coating had a mean thickness of 900 µm. HiPIMS process was performed in various mixtures of Ar:O2: (i) 100:0 vol.%, (ii) 90:10 vol.%, (iii) 75:25 vol.%, (iv) 50:50 vol.%, and (v) 0:100 vol.%. Oxygen rich atmosphere was necessary to oxidize tin atoms. Self-design, simple high voltage power switch capable of charging the 20 µF capacitor bank from external high voltage power supply worked as a power supply for an unbalanced magnetron source. ITO thin films with thickness in the range of 30–40 nm were obtained after 300 deposition pulses of 900 V and deposition time of 900 s. The highest transmission of 88% at λ = 550 nm provided 0:100 vol. % Ar:O2 mixture, together with the lowest resistivity of 0.03 Ω·cm.

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