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Journal articles on the topic 'Snubber'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

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1

Nims, D. K., and J. M. Kelly. "Experimental Study of Mechanical Pipe Snubber Seismic Behavior." Journal of Pressure Vessel Technology 119, no. 3 (August 1, 1997): 384–88. http://dx.doi.org/10.1115/1.2842320.

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A series of seismic tests of mechanical snubbers on a full-scale model piping system provided a unique opportunity for detailed scrutiny of snubber seismic behavior on an actual piping system. The observed snubber behavior is a complicated pattern of braking and releasing, drag and drift, and the dynamic characteristics of the snubber, as well as the input motion, play a role in the response of the snubber. The snubbers were effective in limiting pipe displacements. Relative accelerations across the snubber were larger than expected. Snubber hysteretic behavior was irregular. Results from this testing are important in understanding snubber behavior, evaluating snubber performance, and in assessing alternatives to snubbers.

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2

Tseng, Sheng Yu, and Yi Ren Juang. "Approach to Developing Interleaved Converter with Single-Capacitor Turn-Off Snubber." Applied Mechanics and Materials 284-287 (January 2013): 2477–84. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.2477.

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This paper presents a systematic approach to developing turn-off snubber for an interleaving converter to smooth out switch turn-off transition. With the approach, the interleaving converter with two turn-off snubbers, which are formed by two L-C-D type snubbers, can be replaced by the one with turn-off snubber composed of a single-capacitor snubber. It can be used in the basic six interleaved converters, such as buck, boost, buck-boost, ‘cuk, zeta and sepic converters. In this research, the structure of the interleaved converter with the turn-off snubber can be conveniently simplified from the derived general configurations, reducing the complexity of circuit structure significantly. Measured results from a buck prototype converter have been verified to prove the feasibility of the derived turn-off snubber.

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3

Steyn, C. G. "Analysis and optimization of linear regenerative snubbers." Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie 5, no. 4 (March 18, 1986): 170–77. http://dx.doi.org/10.4102/satnt.v5i4.995.

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In this article both the general linear regenerative turn-on and turn-off snubbers are analysed and optimized independently from one another, in terms of minimum energy losses. The dissipative snubber - which was up to now the only optimized snubber - now becomes merely a special case of this general regenerative snubber. Equations describing the most important parameters are presented in tables, while some energy versus snubber size graphs are also shown.

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4

Tseng, Sheng-Yu, Hung-Yuan Wang, and Chih-Yang Hsu. "Performances of an Interleaved High Step-Up Converter with Different Soft-Switching Snubbers for PV Energy Conversion Applications." International Journal of Photoenergy 2013 (2013): 1–15. http://dx.doi.org/10.1155/2013/834510.

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This paper proposes an interleaved high step-up converter with different soft-switching snubbers for PV energy conversion applications. For the high step-up converter, interleaved and coupled-inductor technologies are used to reduce output ripple current and increase output power level. Simultaneously, two types of snubbers, a single-capacitor snubber and boost type snubber, are introduced separately into the discussed converters for comparing their performances of conversion efficiency and switching losses. For drawing maximum power from the PV arrays, a perturbation-and-observation method realized with the microcontroller is adopted to achieve maximum power point tracking (MPPT) algorithm and power regulating scheme. Finally, two prototypes of the interleaved coupled-inductor boost converter with a single-capacitor snubber and with boost type snubber are implemented, respectively. The experimental results obtained are used to verify and compare the performances and feasibilities of the discussed converters with different snubbers in PV conversion applications. The experimental results show that the proposed system is suitable for PV energy conversion applications when the duty ratios of switches of the converter are less than 0.5.

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5

Lay, C., O. A. Abu-Yasein, M. A. Pickett, J. Madia, and S. K. Sinha. "The Influence of Support Hardware and Piping System Seismic Response on Snubber Support Damping." Journal of Pressure Vessel Technology 119, no. 4 (November 1, 1997): 451–56. http://dx.doi.org/10.1115/1.2842329.

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The damping coefficients and ratios of piping system snubber supports were found to vary logarithmically with pipe support nodal displacement. For piping systems with fundamental frequencies in the range of 0.6 to 6.6 Hz, the support damping ratio for snubber supports was found to increase with increasing fundamental frequency. For 3-kip snubbers, damping coefficient and damping ratio decreased logarithmically with nodal displacement, indicating that the 3-kip snubbers studied behaved essentially as coulomb dampers; while for the 10-kip snubbers studied, damping coefficient and damping ratio increased logarithmically with nodal displacement.

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6

Fathali, Saeed, and André Filiatrault. "Effect of Elastomeric Snubber Properties on Seismic Response of Vibration-Isolated Mechanical Equipment: An Experimental Study." Earthquake Spectra 24, no. 2 (May 2008): 387–403. http://dx.doi.org/10.1193/1.2923921.

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Earthquake-simulator experiments were conducted on a liquid centrifugal chiller supported by four isolation/restraint systems with built-in elastomeric snubbers. The test plan incorporated variations of input motion amplitudes and snubber properties to investigate their effect on three response quantities: peak dynamic forces induced into the snubbers, peak acceleration, and peak relative displacement response of the equipment. The elastomeric snubbers limited the displacement responses of the vibration-isolated equipment at the expense of excessive dynamic forces and amplification of the equipment acceleration response. The snubber gap size was the most influential property on the response quantities. For high-amplitude input motions, all the response quantities increased with an increase of the gap size. Due to the compressibility of the snubber elastomeric contact-surface, the actual gap size was always larger than the nominal gap size. Even with a nominal gap size less than 0.25 in., the seismic response of the equipment was substantially different from the seismic response of rigidly mounted equipment. Compared to snubbers with constant contact-surface, snubbers with expanding contact-surface resulted in lower dynamic forces. The thicker and softer contact-surface could lower the dynamic forces induced into the snubbers but resulted in larger relative displacement response of the equipment.

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7

., Soumya, A. N. Nagashree, and R. S. Geetha. "Comparision of Voltage Stress Across the MOSFET Switch of a Flyback Converter with Various Snubbers." International Journal of Innovative Science and Research Technology 5, no. 6 (July 21, 2020): 1567–71. http://dx.doi.org/10.38124/ijisrt20jun1114.

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A Flyback converter is a simple switch-mode power supply that can be used to generate a DC output from either an AC or DC input. The converter switch is the most critical part of any converter. The voltage stress across the switch is a major issue as the high voltage spikes occur due to interaction between its output capacitance and the leakage inductance of the transformer. These spikes can be reduced with various snubbers like conventional tertiary winding, Resistor Capacitor and Diode(RCD) snubber, energy regenerative snubber and an active clamp snubber. This paper aims to analyze and compare the voltage stress across the MOSFET switch of Flyback converter with various snubber circuits.

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8

Pickett, M. A., D. J. Cunningham, S. K. Sinha, and J. Madia. "Application of the Ritz Averaging Method in the Analysis of the Seismic Performance of Piping Systems." Journal of Pressure Vessel Technology 109, no. 3 (August 1, 1987): 315–22. http://dx.doi.org/10.1115/1.3264871.

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The Ritz averaging method is utilized to reduce the nonlinear characteristics of piping system supports (snubbers) to equivalent linear support stiffnesses during seismic excitation. The equivalent snubber support stiffnesses are used in seismic modal analyses of two piping systems. The analyses are performed in order to determine the effect that high snubber lockup velocities have on piping system stresses. The results show that the lockup velocity of snubbers in the systems analyzed can be safely allowed to increase above normal limits without any significant increase in nodal stresses.

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9

Krishnan Nair, Divya, Krishnamachar Prasad, and Tek Tjing Lie. "Implementation of Snubber Circuits in a PV-Based Off-Grid Electric Vehicle Charging Station—Comparative Case Studies." Energies 14, no. 18 (September 16, 2021): 5853. http://dx.doi.org/10.3390/en14185853.

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With the penetration of electric vehicles (EVs), there have been paradigm shifts in the transportation sector. EVs are ideally considered to be clean and eco-friendly, but they can overload the existing grid infrastructure and significantly contribute towards carbon emissions depending on the source of charging. The ideal solution is to develop a charging infrastructure for EVs that is integrated with solar energy technology. This paper presents the design of a zero-voltage switching snubber-based bidirectional converter for an off-grid charging station for EVs. The proposed system includes a solar array with a boost converter, a bidirectional converter with snubber circuits and an energy storage unit. A comprehensive comparison between various types of snubbers, such as the resistive capacitive diode snubber, active clamp snubber and flyback snubber, is presented. This type of system configuration clamps the rail voltage, due to the difference in current between leakage inductance and low voltage side-fed inductor currents, resulting in reduced current spikes at the converter’s switches. Such a converter, therefore, leads to higher efficiency of the charging station for EVs. The design of a snubber-based off-grid charging station for EVs is formulated and validated in the MATLAB/Simulink environment.

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10

Singh, Alok, Mangesh B. Borage, Sunil R. Tiwari, and A. C. Thakurta. "On the Development of High Power DC-DC Step-Down Converter with Energy Recovery Snubber." Advances in Power Electronics 2012 (July 2, 2012): 1–10. http://dx.doi.org/10.1155/2012/806738.

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The effect of switching losses on the efficiency of a switch mode power converter and methods adopted for its improvement using an energy recovery lossless snubber has been presented. A comparative analysis of various types of soft switching techniques along with effects of dissipative and nondissipative snubbers on efficiency of the converter has been carried out before zeroing in on the selected scheme. The selected snubber serves the dual function of a turn-on and turn-off snubber and thereby reducing the switching losses both during turn-on and turn-off transients, resulting in improved efficiency of the converter. A detailed design procedure of the snubber for high-power applications taking into account various effects such as diode reverse recovery, diode voltage stress, and minimum and maximum duty cycle limits, has been presented in this paper. Importance of practical aspects in layout to minimize wiring inductance is also highlighted. A high-power prototype of buck converter has been developed to experimentally validate the theoretical design and analytical observations.

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11

Wang, Zhen Yan, Zhi Mei Chen, and Jing Gang Zhang. "Simulation and Experimental Study of FRD Snubber Circuits in Buck Converter." Advanced Materials Research 463-464 (February 2012): 1350–54. http://dx.doi.org/10.4028/www.scientific.net/amr.463-464.1350.

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In buck converter, the reverse recovery failure may cause electrical spikes and deteriorate the circuit performance. In this paper, the snubber circuits for FRD in Buck converter are presented and the simulation and experimental study are investigated. RC snubber, saturated inductance snubber and RCD snubber are developed and simulated by PSpice to reduce the voltage spikes of FRD. The comparisons of the voltage spike show the advantages of the snubber circuit for the reverse recovery failure of FRD. In a Buck converter experimental system with RCD snubber circuits, the measured voltage show that the voltage spike of FRD can be suppressed effectively. Simulation and experimental results prove that the snubber circuits presented is easy to implement and can improve the buck converter performance

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12

BRAMBILLA, ANGELO. "SNUBBER BEHAVIOR AND DESIGN IN FLYBACK CONVERTERS FOR ISOLATED IGBT DRIVERS." Journal of Circuits, Systems and Computers 05, no. 03 (September 1995): 523–29. http://dx.doi.org/10.1142/s0218126695000321.

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When flyback converters are connected to floating loads, voltage swings at the output can give rise to spikes which pass through the flyback transformer stray capacitor. This happens when flyback converters supply IGBT floating gate drivers. These voltage spikes can interfere with the correct behavior of the gate driver. In order to reduce the transformer stray capacitance, the two windings must be wound on the opposite sides of the core. However, this reduces the coupling factor of the transformer by increasing its leakage inductance and snubbers must be employed in some cases. This paper deals with snubber design and behavior for flyback converter applications. Since it is shown that snubbers transfer the energy through the flyback transformer, they should be designed in a different way with respect to conventional applications.

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13

Yang, Jie, Jun Liu, Jia Liang Wen, Yu Feng Qiu, Hai Long Bao, Tao Yao, Zhong Yuan Chen, and Zhi Xia Wang. "Study of Snubber Circuits in the Voltage Source Converter Based on Series-Connected IGBTs." Applied Mechanics and Materials 568-570 (June 2014): 1238–42. http://dx.doi.org/10.4028/www.scientific.net/amm.568-570.1238.

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The DC voltage of the VSC is very high and it is necessary to connect several IGBT in series. Some snubber circuits have to be used to restrain the over-voltage of IGBTs so as to avoid its damage and the snubber circuit will increase the current stress too. The over-voltage of IGBT in the converters is studied in the paper firstly. Then, the common snubber circuits used in series-connected IGBTs are discussed and compared. A simulated model is set up in Saber to study the snubber circuit at last, the results show that the RC snubber circuit is more suitable for series-connected IGBTs.

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14

Gao, Wei, Jun Hong Zhang, Xu Sheng Wu, and Jing Hong Zhao. "Analysis of Snubber Circuit Parameters Based on an Excitation Controlling Circuit." Advanced Materials Research 383-390 (November 2011): 2269–75. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.2269.

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In an excitation control system of some DC generator, there are accidents sometimes thanks to the snobbery unit. To solve these bothersome, based on an snubber unit of the excitation control circuit, namely a Buck converter topology with rectifier bridge, with the filter capacitance and the exciting winding impedance parameter assured, the preferences of the resistance and capacitance of the snubber circuit is investigated by simulation. The result is that it can limit the switching-on peak current of the switch when the snubber resistance and capacitance’s parameters are increased suitably, and the former one can lose more energy on the snubber resistance, then the latter one can reduce the striking current in the snubber resistance at the switching-on time. Finally, the simulation results are provided to verify that the exact selection of the snubber resistance and capacitance’s parameters can make excitation controlling circuit more stable and reliable.

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15

Xie, Li Jun, Xian Zheng Liu, Jin Yuan Li, and Kun Shan Yu. "Simulation Analysis of Snubber Circuit for SiC MOSFET Inverter." Advanced Materials Research 1070-1072 (December 2014): 1241–45. http://dx.doi.org/10.4028/www.scientific.net/amr.1070-1072.1241.

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SiC MOSFET, as a promising power semiconductor devices, has attracted attention from many laboratories and companies for its super performance in high temperature, high voltage and high frequency applications. To protect the devices from overvoltage induced by parasitic inductance in high frequency applications, snubber circuit is a must. In this paper, simulation of snubber circuit in a high frequency PWM inverter is invested, under different numbers of snubber circuit , parasitic parameters, different kinds of load and whether a SiC SBD exsits. Some useful conclusions are obtained to help design more perfect snubber circuit.

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16

Cholilurrahman, R. Ahmad, and Dodie Indryanto. "NALISA SWITCHING SNUBBER AKTIF UNTUK BLOCK KONVERTER DC / DC." Sains & Teknologi 2, no. 3 (October 17, 2019): 40. http://dx.doi.org/10.24123/jst.v2i3.2257.

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Problems using the snubber circuit at switcing electronic in buck converter circuit is to reduced of power losses caused by there is no other walked other dissimilar for the load current of burden of moment of switching of electronic of turn off, so that collector voltage will appear in the collector terminal. As evaluation, power losses at electronic switching of moment of turn off without snubber very big, this matter is happened by because its current descend and its voltage go up. There for need in tide of snubber circuit at switching electronic, because subber circuit give the other dissimilar walked for the current of burden of moment of switching electronic turn off. Result of the end show the power losses at electronic switching with snubber circuit of become minimize, if compare to by a power losses at electronic switching without snubber circuit at the time turn off.

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17

Huh, Sun Chul, Han Shik Chung, Hyo Min Jeong, and Byeong Keun Choi. "ASME Code Evaluation on Stress Analysis of Snubber." Key Engineering Materials 326-328 (December 2006): 1339–42. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.1339.

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Small snubber of hydrogen compressor do duty as buffer pulsation of compressed hydrogen. Snubber is a kind of internal pressure vessel and design optimum of snubber very important problem. In this paper, we will estimation results of elastic finite element structural analysis using the commercial program such as ANSYS for comparison to the limits in ASME Code Sec. Ⅷ that are related to membrane and bending stresses. In case of membrane stress in a circular cylindrical due to internal pressure or to distributed live loads. Bending stress in the central portion of flat head due to pressure. In addition, We will propose optimum design value of snubber for hydrogen compressor.

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18

Cetin, Sevilay. "An Improved Zero Voltage Transition PWM Boost Converter with an Active Snubber Cell." Journal of Circuits, Systems and Computers 25, no. 10 (July 22, 2016): 1650128. http://dx.doi.org/10.1142/s0218126616501280.

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This study presents an improved zero voltage switching (ZVS) boost converter with an active snubber cell providing soft switched operation for all semiconductors. The active snubber cell reduces the reverse recovery loss of the boost diode and also provides the zero voltage transition (ZVT) Turn-on and ZVS Turn-off for the boost switch. The zero current switching (ZCS) Turn-on and ZVS Turn-off for the snubber switch is also achieved. All diodes in the converter can be operated with soft switching (SS). In the snubber cell, SS energy can be transfered effectively to the output by the use of a snubber inductor and a capacitor. This energy transfer allows the use of additional parallel connected capacitor to the boost switch to provide ZVS turning off. There is no additional voltage and current stress on the boost switch and boost diode. The voltage stress of the snubber switch is also limited by the output voltage and the current stress of the snubber switch is reduced by the energy transfer to the output. SS operating of the semiconductors is maintained at very wide load ranges. The operation of the proposed converter is presented with a detailed steady state analysis. The predicted theoretical analysis is validated by a prototype with 500[Formula: see text]W output power and 100[Formula: see text]kHz operating frequency. The measured maximum efficiency values are obtained as approximately 97% and 85.4% at full load and 10% load conditions, respectively.

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19

Finney, S. J., B. W. Williams, and T. C. Green. "RCD snubber revisited." IEEE Transactions on Industry Applications 32, no. 1 (1996): 155–60. http://dx.doi.org/10.1109/28.485827.

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20

Brown, D. P., D. E. Blahnik, and J. J. Burns. "Snubber aging assessment." Nuclear Engineering and Design 147, no. 3 (April 1994): 351–57. http://dx.doi.org/10.1016/0029-5493(94)90217-8.

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21

Tseng, Sheng Yu, and Shu Yuan Fan. "Interleaved Soft-Switching Converter with L-C-D Snubber for Reflex Charger." Applied Mechanics and Materials 284-287 (January 2013): 2555–60. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.2555.

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This paper presents a Reflex charger realized by N sets of interleaved soft-switching converters with L-C-D snubbers. The interleaved converters used for implementing the Reflex charging technique can be interleaved boost, interleaved buck-boost, and interleaved sepic converters. The use of the L-C-D snubber in each set of interleaved converter is to reduce turn-off switching losses, hence, to achieve higher conversion efficiencies of the interleaved converters and to extend the lifetime of rechargeable batteries. A prototype of Reflex charger with four sets of interleaved buck-boost con-verters is implemented for charging lead acid batteries of 12V. Experimental results show that the proposed circuit structure can generate the required positive/negative pulses for the Reflex charging.

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22

Russi, J., M. L. Martins, H. A. Gründling, H. Pinheiro, J. R. Pinheiro, and H. L. Hey. "An imroved design for ZVT DC-DC PWM converters with snubber assisted auxiliary switch." Sba: Controle & Automação Sociedade Brasileira de Automatica 16, no. 1 (March 2005): 25–33. http://dx.doi.org/10.1590/s0103-17592005000100003.

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This paper proposes an improved design to calculate the snubber auxiliary elements of ZVT DC-DC PWM converters with snubber assisted auxiliary switch. The proposed improved design guidelines are based on the reduction of the conduction losses through the auxiliary circuit. It is accomplished by the unique location of the turn-off snubber capacitor, which is shared by both active switches. By means of this improved design guidelines the converter efficiency can be increased. An efficiency comparative analysis is carried out and the experimental results, obtained from 1 kW, 100 kHz laboratory prototypes, show a relevant improvement in converter efficiency compared to the original converter design. In addition, experimental results also confirm that with the improved design the ZVT PWM converters with snubber assisted auxiliary switch can be competitive with ZVT PWM converters with constant auxiliary voltage source (True PWM ZVS pole).

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23

Zhao, Wei, Liang-Liang Li, and Di Zhang. "Study on vibration characteristics of damping blade with snubber and shroud based on fractal theory." Thermal Science 20, suppl. 3 (2016): 887–94. http://dx.doi.org/10.2298/tsci160201205z.

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Snubber and shroud have been widely adopted in steam turbine last stage blades to decrease the vibration stress. The contact surfaces between snubber and shroud own obviously fractal geometry characteristics. Based on fractal geometry theory and finite element nonlinear vibration theory, the fractal friction model that describes friction damping contact could be accurately established. In this paper, the contact fractal elements are set up and the nonlinear vibration response characteristics of a long steam turbine last stage blade with snubber and shroud are calculated. The results show that, with the increase of shroud normal force, the resonant amplitude of the blade experiences a decreasing period followed by an increasing period while the modal damping ratio increases first and then decreases when there is only shroud contact. The regulations are similar when there are both shroud and snubber contacts. The resonant frequency increases until the normal contact forces increase to some degree.

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24

Tseng, Sheng Yu, and Geeng Kwei Chang. "Interleaved Boost Converter with Boost-Type Snubber for PV Power System." Applied Mechanics and Materials 284-287 (January 2013): 2548–54. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.2548.

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This paper presents an interleaved boost converter with boost-type snubber for PV system. Paralleled converters working in interleaving manner are adopted to eliminate the pulsating current and increase powering capacity. Boost-type snubber is utilized for soft-switching of the power transistor to reduce switching losses. By switch integration, one boost-type snubber can be shared by N phases of boost converter to effectively reduce component counts and costs. The improved supply characteristics and conversion efficiency make it suitable for charging applications. A prototype for battery charger has been implemented to prove the feasibility of the proposed topology.

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25

Olson, D. E., and Y. K. Tang. "Decreasing snubber inservice inspection costs through snubber reduction and improved test limits." Nuclear Engineering and Design 107, no. 1-2 (April 1988): 183–99. http://dx.doi.org/10.1016/0029-5493(88)90321-4.

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26

Huang, Peng Fei, Chun Lei Zhang, Li Jun Sha, and Shi Jun Wang. "The Study of Arc Welding Power Circuit Based on Forward Converter with LCD Nondissipative Snubber." Applied Mechanics and Materials 66-68 (July 2011): 1045–50. http://dx.doi.org/10.4028/www.scientific.net/amm.66-68.1045.

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Through the study of double switch forward converter, an arc welding power circuit with LCD nondissipative snubber is designed by using IGBT as its power switch. The operating principle of this converter is analyzed in detail; the design considerations of key circuit parameters for the topology are introduced. The LCD nondissipative snubber can not only suppress the voltage spike, but also reduce switching loses and improve power density and efficiency. Furthermore, the snubber itself is lossless. The paper provides the foundation of researching high efficiency power circuit based on Interleaving Two-Transistor converter. The experiment results of the prototype coincide with the theoretical analysis and the validity of analysis approach is proved.

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27

Hayashi, Kei, Tsuyoshi Funaki, Hisato Michikoshi, and Kenji Fukuda. "1MHz Switching Operation of 1200V Full SiC Power Module." Materials Science Forum 924 (June 2018): 832–35. http://dx.doi.org/10.4028/www.scientific.net/msf.924.832.

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This paper develops 1200V, 50A full SiC half bridge power module, which embeds C snubber and gate resistors. Embedded C snubber suppresses surge voltage in fast switching operation, and gate resistors avoid gate oscillation of parallel connected SiC MOSFET in the module. 1MHz switching operation of developed module with 600V DC-link voltage is experimentally confirmed.

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28

Kasasbeh, Abdalkreem, Burak Kelleci, Salih Baris Ozturk, Ahmet Aksoz, and Omar Hegazy. "SEPIC Converter with an LC Regenerative Snubber for EV Applications." Energies 13, no. 21 (November 3, 2020): 5765. http://dx.doi.org/10.3390/en13215765.

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A Single-Ended Primary-Inductor Converter (SEPIC) converter with an Inductor-Capacitor (LC) regenerative snubber is proposed to reduce Electromagnetic Interference (EMI) for Electric Vehicle (EV) applications. The switching energy is transferred through a capacitor to an inductor which is coupled to SEPIC inductors. This technique reduces the number of components and also returns some of switching energy to SEPIC converter. The mathematical analysis and optimization of LC snubber with respect to number of turns is also presented. Spice simulations and experimental results are provided to verify its performance. The proposed LC regenerative snubber reduces the peak voltage by 16 V on the switching transistor during the switching transient. It is also indicated that 8 dB reduction is achieved in the EMI measurements at ringing frequency and 10 dB reduction at high frequency band.

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29

Kasiran, A. N., A. Ponniran, A. A. Bakar, M. H. Yatim, M. K. R. Noor, and J. N. Jumadril. "Implementation of Resonant and Passive Lossless Snubber Circuits for DC-DC Boost Converter." International Journal of Engineering & Technology 7, no. 4.30 (November 30, 2018): 246. http://dx.doi.org/10.14419/ijet.v7i4.30.22276.

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This paper presents the comparison of resonant and passive lossless snubber circuits implementation for DC-DC boost converter to achieve soft-switching condition. By applying high switching frequency, the volume reduction of passive component can be achieved. However, the required of high switching frequency cause the switching loss during turn-ON and turn-OFF condition. In order to reduce the switching loss, soft-switching technique is required in order to reduce or eliminate the losses at switching devices. There are various of soft-switching techniques can be considered, either to reduce the switching loss during turn-ON only, or turn-OFF only, or both. This paper discusses comparative analyses of resonant and passive lossless snubber circuits which applied in the DC-DC boost converter structure. Based on the simulation results, the switching loss is approximately eliminated by applying soft-switching technique compared to the hard-switching technique implementation. The results show that the efficiency of resonant circuit and passive lossless snubber circuit are 82.99% and 99.24%, respectively. Therefore, by applying passive lossless snubber circuit in the DC-DC boost converter, the efficiency of the converter is greatly increased. Due to the existing of an additional capacitor in soft-switching circuit, it realizes lossless operation of DC-DC boost converter.

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30

Mahesh Gowda, N. M., and S. S. Parthasarathy. "Selection of Inductor and Snubber Capactor to Optimize the Size and Efficiency of DC-DC Switching Power Converter." Asian Journal of Engineering and Applied Technology 7, no. 1 (May 5, 2018): 49–52. http://dx.doi.org/10.51983/ajeat-2018.7.1.977.

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This paper presents a selection of inductor and snubber capacitor in non-isolated synchronous DC-DC switching power converter. The circuit is made to operate in Synchronous Discontinuous Conduction Mode (SDCM)/Forced Continuous Conduction Mode (FCCM) of operation for minimum inductor value, to reduce the size, weight and cost of the converter. The turn off loss of the switch induced by SDCM of operation is minimized by connecting snubber capacitor across the transistor switch. Before the switch is turned ON, snubber capacitor requires certain amount of energy must be stored in the inductor to discharge the capacitor energy [1]. The question is how much capacitor and inductor value is required. A series of MATLAB script are executed to find minimum inductor value for FCCM of operation and to select snubber capacitor for maximum efficiency. Complementary gate signals are used to control the ON and OFF of main and auxiliary switch. SDCM of operation due to complementary control gate signal scheme, minimum turn on loss of the transistor switch and low diode reverse recovery loss are achieved. Thus the Zero Voltage Resonant Transition (ZVRT) of transistor switch is realized, both turn on and turn off loss is minimized and also removes the parasitic ringing in inductor current.

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31

Ware, A. G. "The History of Allowable Damping Values for U.S. Nuclear Plant Piping." Journal of Pressure Vessel Technology 113, no. 2 (May 1, 1991): 284–90. http://dx.doi.org/10.1115/1.2928756.

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Prior to 1982, pipe damping values in nuclear plants were prescribed by Regulatory Guide 1.61 and Appendix N to Section III of the ASME Boiler and Pressure Vessel Code. In the early 1980s, it became clear that piping design was too conservative resulting in systems that had far too many supports, particularly snubbers. These supports were costly to design, install, and inspect; contributed to increased worker radiation exposure; and since snubbers sometimes lock when unloaded causing higher fatigue usage in piping, the safety margin of the systems was reduced. A series of steps was undertaken by the Pressure Vessel Research Committee (PVRC) to propose new damping limits, which culminated in alternate damping allowable values, called PVRC damping. This damping was later adopted as Code Case N-411 to the ASME Code. Code Case N-411 has enabled several utilities to make significant reductions in the number of snubbers on their plants, resulting in lower maintenance costs, lower worker radiation exposure, and greater reliability (since the consequences of snubber malfunction are reduced). More recently, the Electric Power Research Institute sponsored a project by Bechtel to review the damping data, perform a regression analysis, and recommend a permanent change to the ASME Code to replace Code Case N-411.

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32

Ryu, Geun-Chae, and Chung-Gi Kim. "Power Measurement of Snubber Circuit." Korean Society of Technical Education and Training 23, no. 2 (January 30, 2018): 45–50. http://dx.doi.org/10.29279/kostet.2018.23.2.45.

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33

Radika, P., and Subhranasu Sekar Dash. "Regenerative snubber for UPS inverter." International Journal of Power Electronics 2, no. 1 (2010): 66. http://dx.doi.org/10.1504/ijpelec.2010.029500.

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34

Sutherland, Peter E., Marcelo E. Valdes, and Gary H. Fox. "Snubber Design for Transformer Protection." IEEE Transactions on Industry Applications 52, no. 1 (January 2016): 692–700. http://dx.doi.org/10.1109/tia.2015.2473137.

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35

Petersen, Mark Edward, and William P. Adkins. "Radial snubber for vibration isolator." Journal of the Acoustical Society of America 115, no. 2 (2004): 452. http://dx.doi.org/10.1121/1.1669265.

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36

Dzhunusbekov, Erlan, and Sagi Orazbayev. "A New Passive Lossless Snubber." IEEE Transactions on Power Electronics 36, no. 8 (August 2021): 9263–72. http://dx.doi.org/10.1109/tpel.2021.3056189.

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37

di Benedetto, Marco, Luca Bigarelli, Alessandro Lidozzi, and Luca Solero. "Efficiency Comparison of 2-Level SiC Inverter and Soft Switching-Snubber SiC Inverter for Electric Motor Drives." Energies 14, no. 6 (March 18, 2021): 1690. http://dx.doi.org/10.3390/en14061690.

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This paper focuses on the investigation and implementation of a high-performance power conversion system to reduce the overvoltage phenomenon in variable speed electric drive applications. Particularly, the pros and cons of using Silicon Carbide power MOSFETs in the power converter when a long power cable is employed in electric motor drive systems has been addressed. The three-phase two level inverter with the addition of snubber circuits that consist of capacitors and diodes has been investigated, designed and tested in order to mitigate the overvoltage problems without sacrificing the conversion efficiency. Given that the snubber circuit added to the switches can increase losses, an additional circuit is used to recover the energy from the snubber circuit. The proposed analysis has been then validated through an experimental campaign performed on the converter prototype. The experimental results show that the proposed converter can reduce the overvoltage at the electric motor terminals with excellent conversion efficiency compared to the classical solution like the three-phase two level inverter.

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38

Steyn, C. G., and J. D. Van Wyk. "A non-linear turn-off snubber for power electronic switches." Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie 4, no. 4 (March 18, 1985): 143–46. http://dx.doi.org/10.4102/satnt.v4i4.1048.

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A novel suggestion for a non-linear turn-off snubber is simulated experimentally with linear capacitors and an auxiliary power electronic switch. Thus the principle and advantages of this concept is partly illustrated, particularly concerning the important reduction of reactive stored energy for the same switching dissipation in the main power device. The full advantages of the concept will be realised when a snubber capacitor with non-linear, voltage dependent dielectric is used. The work on this part of the solution is being continued.

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ROH, CHUNG-WOOK, GUN-WOO MOON, and MYUNG-JOONG YOUN. "SINGLE-STAGE SINGLE-SWITCHED RECTIFIER/REGULATOR WITH MAGNETIC COUPLED NONDISSIPATIVE SNUBBER." Journal of Circuits, Systems and Computers 13, no. 03 (June 2004): 557–76. http://dx.doi.org/10.1142/s0218126604001465.

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This paper presents a new single-stage single-switched forward converter with magnetic coupled nondissipative snubber, which gives good power factor correction (PFC), low current harmonic distortion, and tight output voltage regulation. The proposed converter features low switch current and voltage stresses, essential for the design of a single-stage power factor correction converter. The prototype shows that the IEC1000-3-2 requirements are met satisfactorily with nearly unity power factor. This proposed converter with magnetic coupled nondissipative snubber is particularly suited for power supply applications with low power level.

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40

Yang, Jian Hua, Ding Hua Zhang, Bao Hai Wu, and Ying Zhang. "A Localization Model for Snubber Machining of Precision Forging Blade." Advanced Materials Research 875-877 (February 2014): 1127–32. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.1127.

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The compressor blades of aero-engines are usually produced with precision forging technology to get net-shape free-form surface of the blades. Due to the complex shape of blade snubber, it’s very difficult to get net-shape for it. While, there are still lots of raw material around it, further multi-axis machining is needed. However, without raw material left on blade surfaces, it is very difficult and skill-dependent to design special fixture to localize the blade with its net-shape free-form surface for multi-axis milling. In order to mill blade snubber with high accuracy, a mathematical model for localization precision forging blade with snubber is proposed in this paper. According to the processing characteristic of precision forging blades, a point set selection method based on the CAD model is proposed. In this method, localization transform parameter is obtained by using SVD (Singular Value Decomlocalizing), and solving process is completed by employing iterative nearest point (ICP) algorithm. Finally, a machining simulation experiment is carried out to validate the effectiveness of the proposed method.

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41

Zaman, Haider, Xiaohua Wu, Xiancheng Zheng, Shahbaz Khan, and Husan Ali. "Suppression of Switching Crosstalk and Voltage Oscillations in a SiC MOSFET Based Half-Bridge Converter." Energies 11, no. 11 (November 10, 2018): 3111. http://dx.doi.org/10.3390/en11113111.

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The silicon carbide (SiC) MOSFET is characterized by high operating voltage, temperature, switching frequency and efficiency which enables a converter to achieve high power density. However, at high switching frequency, the crosstalk phenomenon occurs when the gate voltage spike introduced by high dv/dt and voltage ringing forces false turn-on of SiC MOSFET which causes a crow-bar current thereby increasing switching losses. In order to increase the immunity against the crosstalk phenomenon in a half-bridge configuration, this paper presents a gate driver for SiC MOSFET capable of generating the negative turn-off voltage without using a negative power supply. In addition, the effect of parasitic inductances on the switching response is analyzed and an RC snubber is designed using high-frequency based circuit reduction technique to dampen the switching ringing. The performance of the proposed gate driver and the designed RC snubber is validated using simulation and experiment at the 1 MHz switching frequency. The results show that the proposed gate driver with RC snubber eliminates crosstalk by maintaining any spurious gate spike below the gate threshold voltage.

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Liu, Yun Long, Jian Ping Tan, and Yan Xu. "RC Snubber Circuit of Large Gap Magnetic Driven System." Applied Mechanics and Materials 105-107 (September 2011): 2076–79. http://dx.doi.org/10.4028/www.scientific.net/amm.105-107.2076.

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Based on the single chip microcomputer (SCM) control theory, the control circuit of magnetic driving system of axial flow blood pump is designed. For the easy damage of TIP 122, which is used as the power switch of control circuit, RC snubber circuit is designed by analysis and experiments. And then an optimal matching of the key parameters is obtained to solve the security problem of the TIP 122. The experimental results show that the RC snubber circuit can improve the reliability and stability of the driving system, and to provide an experimental foundation for the further studies.

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43

Das, Bhaba P., Neville R. Watson, and Yonghe Liu. "Experimental Evaluation on the Influence of RCD Snubbers in a 3-Level Thyristor Based MLCR CSC." Journal of Engineering 2016 (2016): 1–18. http://dx.doi.org/10.1155/2016/2490926.

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Multilevel current reinjection (MLCR) concept provides self-commutation capability to thyristors, enabling thyristor based current source converters (CSC) to operate under negative firing angle. It also lowers the input current harmonic distortion. This is achieved by using an auxiliary reinjection bridge. Extensive experimental results are presented in this paper to analyse the performance of the 3-level MLCR CSC for different snubber components across the reinjection bridge. The trade-off in the choice of the snubber circuit is illustrated, with its influence on the AC side line current and DC side output voltage of the 3-level MLCR CSC.

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44

Wang Haitian, 王海田, 李格 Li Ge, and 曹亮 Cao Liang. "Snubber for EAST neutral beam injector." High Power Laser and Particle Beams 22, no. 6 (2010): 1373–77. http://dx.doi.org/10.3788/hplpb20102206.1373.

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45

HIMMELSTOSS, F. A., A. R. DERIN, and M. CERNAT. "Boost Converter with Active Snubber Network." Advances in Electrical and Computer Engineering 17, no. 1 (2017): 55–60. http://dx.doi.org/10.4316/aece.2017.01008.

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46

Li, Ge, Haitian Wang, and Liang Cao. "The engineering design of NB snubber." IEEE Transactions on Dielectrics and Electrical Insulation 18, no. 4 (August 2011): 1097–103. http://dx.doi.org/10.1109/tdei.2011.5976101.

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47

Dzhunusbekov, Erlan J. "A novel semi-active regenerative snubber." Journal of Vibroengineering 22, no. 5 (August 15, 2020): 1240–50. http://dx.doi.org/10.21595/jve.2020.21005.

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48

Wang, Haitian, Ge Li, Guangfu Tang, and Zhiyuan He. "Equivalent Circuit Analysis for Core Snubber." IEEE Transactions on Plasma Science 40, no. 3 (March 2012): 635–40. http://dx.doi.org/10.1109/tps.2011.2180402.

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49

Rahmani, Fatemeh, Payam Niknejad, Tanushree Agarwal, and Mohammadreza Barzegaran. "Gallium Nitride Inverter Design with Compatible Snubber Circuits for Implementing Wireless Charging of Electric Vehicle Batteries." Machines 8, no. 3 (September 15, 2020): 56. http://dx.doi.org/10.3390/machines8030056.

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High-frequency wireless power transfer (WPT) technology provides superior compatibility in the alignment with various WPT standards. However, high-efficiency and compact single-phase power switching systems with ideal snubber circuits are required for maximum power transfer capability. This research aims to develop an inverter using Gallium Nitride (GaN) power transistors, optimized RCD (resistor/capacitor/diode) snubber circuits, and gate drivers, each benefitting WPT technology by reducing the switching and conduction loss in charging electric vehicle batteries. A full-bridge GaN inverter was simulated and instituted as part of the wireless charging circuit design. The RCD circuits were adjusted by transferring maximum power from the power supply to the transmitter inductor. For verification of the simulated output, lab-scale experiments were implemented for two half-bridges controlled by gate drivers with corresponding snubber circuits. After authenticating the output results, the GaN inverter was tested with an input range of 30 V to deduce the success of charging electric vehicle batteries within an efficient time frame. The developed inverter, at 80 kHz frequency, was applied in place of a ready-to-use evaluation board, fully reducing less harmonic distortion and greatly increasing WPT system efficiency (~93%). In turn, the designed GaN inverter boasts considerable energy savings, resulting in a more cost-effective solution for manufacturers.

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R. Reinert, Marcos, Jonathan Dômini Sperb, Marcello Mezaroba, Cassiano Rech, and Leandro Michels. "Transformerless Doubleconversion Ups Using A Regenerative Snubber Circuit." Eletrônica de Potência 16, no. 2 (May 1, 2011): 158–67. http://dx.doi.org/10.18618/rep.2011.2.158167.

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