Demonstration of compact solid-state opening and closing switch utilizing GTOs in series

1991 ◽  
Vol 38 (4) ◽  
pp. 706-711 ◽  
Author(s):  
T.F. Podlesak ◽  
J.L. Carter ◽  
J.A. McMurray
Keyword(s):  
Solid State ◽  
In Series ◽  
Opening And Closing

scholarly journals Flyback Converter for Solid-State Lighting Applications with Partial Energy Processing

Electronics ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 60
Author(s):  
Mario Ponce-Silva ◽  
Daniel Salazar-Pérez ◽  
Oscar Miguel Rodríguez-Benítez ◽  
Luis Gerardo Vela-Valdés ◽  
Abraham Claudio-Sánchez ◽  
...  
Keyword(s):  
Solid State ◽  
Power Supply ◽  
Design Methodology ◽  
Low Frequency ◽  
Solid State Lighting ◽  
Voltage Source ◽  
Flyback Converter ◽  
Partial Energy ◽  
In Series ◽  
Energy Processing

The main contribution of this paper is to show a new AC/DC converter based on the rearrangement of the flyback converter. The proposed circuit only manages part of the energy and the rest is delivered directly from the source to the load. Therefore, with the new topology, the efficiency is increased, and the stress of the components is reduced. The rearrangement consist of the secondary of the flyback is placed in parallel with the load, and this arrangement is connected in series with the primary side and the rectified voltage source. The re-arranged flyback is only a reductive topology and with no magnetic isolation. It was studied as a power supply for LEDs. A low frequency averaged analysis (LFAA) was used to determine the behavior of the proposed circuit and an equivalent circuit much easier to analyze was obtained. To validate the theoretical analysis, a design methodology was developed for the re-arranged flyback converter. The designed circuit was implemented in a 10 W prototype. Experimental results showed that the converter has a THDi = 21.7% and a PF = 0.9686.

Selective Wave Filtering in Time-Modulated Elastic Metamaterials

2018 ◽  
Author(s):  
Yiwei Xia ◽  
Giuseppe Trainiti ◽  
Alper Erturk ◽  
Massimo Ruzzene
Keyword(s):  
Single Port ◽  
Negative Capacitance ◽  
Time Modulation ◽  
Piezoelectric Patch ◽  
Flat Bands ◽  
Elastic Metamaterials ◽  
In Series ◽  
Port System ◽  
Opening And Closing ◽  
Time Periodic

We implement periodic stiffness time-modulation in a beam with piezoelectric patches and switchable shunted negative capacitance. The shunted negative capacitance circuits, connected in series with each piezoelectric patch through a switch, soften the structure. By alternatively opening and closing the switch, the beam’s stiffness effectively oscillates periodically between two values. We present a simplified theoretical model of time-periodic beams and describe the occurrence of flat bands in the dispersion diagrams. We show that a narrowband reflection from a time-modulated domain can be obtained for a broadband incident wave, hence qualifying the modulated domain as a single-port system with tunable response. We validate our theoretical findings by comparing time-domain simulations with experimental measurements of transient wavefields through scanning Doppler laser vibrometry.

Solid state switch utilizing GTOs in series

2003 ◽  
Author(s):  
T.F. Podlesak ◽  
J.A. McMurray ◽  
J.L. Carter
Keyword(s):  
Solid State ◽  
In Series

scholarly journals Sequential halochromic/mechanochromic luminescence of pyridyl-substituted solid-state emissive dyes: thermally controlled stepwise recovery of the original emission color

CrystEngComm ◽  
2019 ◽  
Vol 21 (38) ◽  
pp. 5699-5706 ◽  
Author(s):  
Suguru Ito ◽  
Chika Nishimoto ◽  
Sayaka Nagai
Keyword(s):  
Solid State ◽  
Emission Color ◽  
In Series ◽  
Temperature Controlled ◽  
Mechanochromic Luminescence

A stepwise temperature-controlled emission-color switch has been achieved in a system that combines halochromic and mechanochromic luminescence in series.

scholarly journals A new kind of solid-state Marx generator based on transformer type magnetic switches

2013 ◽  
Vol 31 (2) ◽  
pp. 239-248 ◽  
Author(s):  
Yu Zhang ◽  
Jinliang Liu
Keyword(s):  
Solid State ◽  
Life Time ◽  
Input Voltage ◽  
Magnetic Core ◽  
Marx Generator ◽  
Magnetic Switch ◽  
Transformer Type ◽  
In Series ◽  
New Type ◽  
High Level

AbstractIn this paper, a new kind of solid-state Marx generator based on synchronous transformer type magnetic switches (TTMS) is put forward, and the TTMSs with new winding structures are used to substitute all the spark gaps in the traditional Marx generator for the purposes of solidification and long life time. As the new type of TTMS with high step-up ratio and low saturated inductances is employed, the proposed Marx generator becomes a compact combination of pulse transformer, magnetic switch, and Marx capacitors. The stages of the Marx capacitors can be synchronously charged in parallel before the magnetic core saturates, and these Marx capacitors also can synchronously discharge in series. The establishing time of the proposed Marx generator is at ns range. As the new type of self-reset TTMS is used, the input voltage of the Marx generator decreases to a low level less than 1 kV while the output voltage can easily reach a high level ranging from dozens of kV to hundreds of kV.

scholarly journals Application of varistor-posistor structure for protection from overvoltages of photovoltaic cells of solar arrays

2019 ◽  
Vol 27 (1) ◽  
pp. 79-88 ◽  
Author(s):  
A. V. Ivanchenko ◽  
A. S. Tonkoshkur ◽  
S. V. Mazurik
Keyword(s):  
Solid State ◽  
Fire Hazard ◽  
Low Cost ◽  
Thermal Contact ◽  
Photovoltaic Cells ◽  
Experimental Studies ◽  
Electric Energy ◽  
Solar Arrays ◽  
In Series ◽  
The Cost

The problems of reducing the cost of ensuring the safe operation of solar cells by using low-cost elements of solid-state electronics to protect against overvoltage photovoltaic cells of solar arrays are considered. The results of experimental studies of the use of a varistor-posistor structure based on a metal oxide varistor and PPTC fuses of the PolySwitch type being in thermal contact to prevent overvoltages in series connections of photovoltaic cells are presented. General schemes for using the considered solid-state structure to limit the indicated constant overvoltages are given and justified. The requirements to the parameters of this structure are determined and experimentally verified. It is shown that such a device makes it possible to limit the long-term constant overvoltages that occur in photovoltaic arrays at the level of photovoltaic cells in the case of their malfunction or shadowing, which can lead to fire hazard and other “abnormal” situations during the operation of solar electric energy sources.

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