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snubber</title> <meta name="description" content="Search results for: snubber"> <meta name="keywords" content="snubber"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none navbar-toggler ml-auto" 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class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="snubber"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 8</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: snubber</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">8</span> The Experience with SiC MOSFET and Buck Converter Snubber Design</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Petr%20Vaculik">Petr Vaculik</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The newest semiconductor devices on the market are MOSFET transistors based on the silicon carbide – SiC. This material has exclusive features thanks to which it becomes a better switch than Si – silicon semiconductor switch. There are some special features that need to be understood to enable the device’s use to its full potential. The advantages and differences of SiC MOSFETs in comparison with Si IGBT transistors have been described in first part of this article. Second part describes driver for SiC MOSFET transistor and last part of article represents SiC MOSFET in the application of buck converter (step-down) and design of simple RC snubber. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=SiC" title="SiC">SiC</a>, <a href="https://publications.waset.org/abstracts/search?q=Si" title=" Si"> Si</a>, <a href="https://publications.waset.org/abstracts/search?q=MOSFET" title=" MOSFET"> MOSFET</a>, <a href="https://publications.waset.org/abstracts/search?q=IGBT" title=" IGBT"> IGBT</a>, <a href="https://publications.waset.org/abstracts/search?q=SBD" title=" SBD"> SBD</a>, <a href="https://publications.waset.org/abstracts/search?q=RC%20snubber" title=" RC snubber"> RC snubber</a> </p> <a href="https://publications.waset.org/abstracts/3291/the-experience-with-sic-mosfet-and-buck-converter-snubber-design" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/3291.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">483</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7</span> A Soft Switching PWM DC-DC Boost Converter with Increased Efficiency by Using ZVT-ZCT Techniques</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yakup%20Sahin">Yakup Sahin</a>, <a href="https://publications.waset.org/abstracts/search?q=Naim%20Suleyman%20Ting"> Naim Suleyman Ting</a>, <a href="https://publications.waset.org/abstracts/search?q=Ismail%20Aksoy"> Ismail Aksoy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, an improved active snubber cell is proposed on account of soft switching (SS) family of pulse width modulation (PWM) DC-DC converters. The improved snubber cell provides zero-voltage transition (ZVT) turn on and zero-current transition (ZCT) turn off for main switch. The snubber cell decreases EMI noise and operates with SS in a wide range of line and load voltages. Besides, all of the semiconductor devices in the converter operate with SS. There is no additional voltage and current stress on the main devices. Additionally, extra voltage stress does not occur on the auxiliary switch and its current stress is acceptable value. The improved converter has a low cost and simple structure. The theoretical analysis of converter is clarified and the operating states are given in detail. The experimental results of converter are obtained by prototype of 500 W and 100 kHz. It is observed that the experimental results and theoretical analysis of converter are suitable with each other perfectly. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=active%20snubber%20cells" title="active snubber cells">active snubber cells</a>, <a href="https://publications.waset.org/abstracts/search?q=DC-DC%20converters" title=" DC-DC converters"> DC-DC converters</a>, <a href="https://publications.waset.org/abstracts/search?q=zero-voltage%20transition" title=" zero-voltage transition"> zero-voltage transition</a>, <a href="https://publications.waset.org/abstracts/search?q=zero-current%20transition" title=" zero-current transition"> zero-current transition</a> </p> <a href="https://publications.waset.org/abstracts/43259/a-soft-switching-pwm-dc-dc-boost-converter-with-increased-efficiency-by-using-zvt-zct-techniques" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43259.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">1020</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6</span> ZVZCT PWM Boost DC-DC Converter</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ismail%20Aksoy">Ismail Aksoy</a>, <a href="https://publications.waset.org/abstracts/search?q=Haci%20Bodur"> Haci Bodur</a>, <a href="https://publications.waset.org/abstracts/search?q=Nihan%20Altinta%C5%9F"> Nihan Altintaş</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper introduces a boost converter with a new active snubber cell. In this circuit, all of the semiconductor components in the converter softly turns on and turns off with the help of the active snubber cell. Compared to the other converters, the proposed converter has advantages of size, number of components and cost. The main feature of proposed converter is that the extra voltage stresses do not occur on the main switches and main diodes. Also, the current stress on the main switch is acceptable level. Moreover, the proposed converter can operates under light load conditions and wide input line voltage. In this study, the operating principle of the proposed converter is presented and its operation is verified with the Proteus simulation software for a 1 kW and 100 kHz model. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=active%20snubber%20cell" title="active snubber cell">active snubber cell</a>, <a href="https://publications.waset.org/abstracts/search?q=boost%20converter" title=" boost converter"> boost converter</a>, <a href="https://publications.waset.org/abstracts/search?q=zero%20current%20switching" title=" zero current switching"> zero current switching</a>, <a href="https://publications.waset.org/abstracts/search?q=zero%20voltage%20switching" title=" zero voltage switching"> zero voltage switching</a> </p> <a href="https://publications.waset.org/abstracts/31439/zvzct-pwm-boost-dc-dc-converter" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31439.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">1026</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5</span> Parametric Investigation of Aircraft Door’s Emergency Power Assist System (EPAS)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Marshal%20D.%20Kafle">Marshal D. Kafle</a>, <a href="https://publications.waset.org/abstracts/search?q=Jun%20H.%20Kim"> Jun H. Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Hyun%20W.%20Been"> Hyun W. Been</a>, <a href="https://publications.waset.org/abstracts/search?q=Kyoung%20M.%20Min"> Kyoung M. Min</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fluid viscous damping systems are well suited for many air vehicles subjected to shock and vibration. These damping system work with the principle of viscous fluid throttling through the orifice to create huge pressure difference between compression and rebound chamber and obtain the required damping force. One application of such systems is its use in aircraft door system to counteract the door’s velocity and safely stop it. In exigency situations like crash or emergency landing where the door doesn’t open easily, possibly due to unusually tilting of fuselage or some obstacles or intrusion of debris obstruction to move the parts of the door, such system can be combined with other systems to provide needed force to forcefully open the door and also securely stop it simultaneously within the required time i.e.less than 8seconds. In the present study, a hydraulic system called snubber along with other systems like actuator, gas bottle assembly which together known as emergency power assist system (EPAS) is designed, built and experimentally studied to check the magnitude of angular velocity, damping force and time required to effectively open the door. Whenever needed, the gas pressure from the bottle is released to actuate the actuator and at the same time pull the snubber’s piston to operate the emergency opening of the door. Such EPAS installed in the suspension arm of the aircraft door is studied explicitly changing parameters like orifice size, oil level, oil viscosity and bypass valve gap and its spring of the snubber at varying temperature to generate the optimum design case. Comparative analysis of the EPAS at several cases is done and conclusions are made. It is found that during emergency condition, the systemopening time and angular velocity, when snubber with 0.3mm piston and shaft orifice and bypass valve gap of 0.5 mm with its original spring is used,shows significant improvement over the old ones. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aircraft%20door%20damper" title="aircraft door damper">aircraft door damper</a>, <a href="https://publications.waset.org/abstracts/search?q=bypass%20valve" title=" bypass valve"> bypass valve</a>, <a href="https://publications.waset.org/abstracts/search?q=emergency%20power%20assist%20system" title=" emergency power assist system"> emergency power assist system</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20damper" title=" hydraulic damper"> hydraulic damper</a>, <a href="https://publications.waset.org/abstracts/search?q=oil%20viscosity" title=" oil viscosity"> oil viscosity</a> </p> <a href="https://publications.waset.org/abstracts/20984/parametric-investigation-of-aircraft-doors-emergency-power-assist-system-epas" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20984.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">423</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4</span> 1 kW Power Factor Correction Soft Switching Boost Converter with an Active Snubber Cell</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yakup%20Sahin">Yakup Sahin</a>, <a href="https://publications.waset.org/abstracts/search?q=Naim%20Suleyman%20Ting"> Naim Suleyman Ting</a>, <a href="https://publications.waset.org/abstracts/search?q=Ismail%20Aksoy"> Ismail Aksoy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A 1 kW power factor correction boost converter with an active snubber cell is presented in this paper. In the converter, the main switch turns on under zero voltage transition (ZVT) and turns off under zero current transition (ZCT) without any additional voltage or current stress. The auxiliary switch turns on and off under zero current switching (ZCS). Besides, the main diode turns on under ZVS and turns off under ZCS. The output current and voltage are controlled by the PFC converter in wide line and load range. The simulation results of converter are obtained for 1 kW and 100 kHz. One of the most important feature of the given converter is that it has direct power transfer as well as excellent soft switching techniques. Also, the converter has 0.99 power factor with the sinusoidal input current shape. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=power%20factor%20correction" title="power factor correction">power factor correction</a>, <a href="https://publications.waset.org/abstracts/search?q=direct%20power%20transfer" title=" direct power transfer"> direct power transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=zero-voltage%20transition" title=" zero-voltage transition"> zero-voltage transition</a>, <a href="https://publications.waset.org/abstracts/search?q=zero-current%20transition" title=" zero-current transition"> zero-current transition</a>, <a href="https://publications.waset.org/abstracts/search?q=soft%20switching" title=" soft switching"> soft switching</a> </p> <a href="https://publications.waset.org/abstracts/45336/1-kw-power-factor-correction-soft-switching-boost-converter-with-an-active-snubber-cell" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/45336.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">962</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3</span> A Comprehensive Evaluation of IGBTs Performance under Zero Current Switching</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ly.%20Benbahouche">Ly. Benbahouche</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Currently, several soft switching topologies have been studied to achieve high power switching efficiency, reduced cost, improved reliability and reduced parasites. It is well known that improvement in power electronics systems always depend on advanced in power devices. The IGBT has been successfully used in a variety of switching applications such as motor drives and appliance control because of its superior characteristics. The aim of this paper is focuses on simulation and explication of the internal dynamics of IGBTs behaviour under the most popular soft switching schemas that is Zero Current Switching (ZCS) environments. The main purpose of this paper is to point out some mechanisms relating to current tail during the turn-off and examination of the response at turn-off with variation of temperature, inductance L, snubber capacitors Cs, and bus voltage in order to achieve an improved understanding of internal carrier dynamics. It is shown that the snubber capacitor, the inductance and even the temperature controls the magnitude and extent of the tail current, hence the turn-off time (switching speed of the device). Moreover, it has also been demonstrated that the ZCS switching can be utilized efficiently to improve and reduce the power losses as well as the turn-off time. Furthermore, the turn-off loss in ZCS was found to depend on the time of switching of the device. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=PT-IGBT" title="PT-IGBT">PT-IGBT</a>, <a href="https://publications.waset.org/abstracts/search?q=ZCS" title=" ZCS"> ZCS</a>, <a href="https://publications.waset.org/abstracts/search?q=turn-off%20losses" title=" turn-off losses"> turn-off losses</a>, <a href="https://publications.waset.org/abstracts/search?q=dV%2Fdt" title=" dV/dt"> dV/dt</a> </p> <a href="https://publications.waset.org/abstracts/6516/a-comprehensive-evaluation-of-igbts-performance-under-zero-current-switching" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6516.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">316</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2</span> Digital Control Techniques for Power Electronic Devices</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rakesh%20Krishna">Rakesh Krishna</a>, <a href="https://publications.waset.org/abstracts/search?q=Abhishek%20Poddar"> Abhishek Poddar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The paper discusses the work carried out on the implementation of control techniques like Digital Pulse Width Modulation (PWM) and Digital Pulse Fired control(PFC). These techniques are often used in devices like inverters, battery chargers, DC-to-DC converters can also be implemented on household devices like heaters. The advantage being the control and improved life span of device. In case of batteries using these techniques are known to increase the life span of battery in mobiles and other hand-held devices. 8051 microcontroller is used to implement these methods.Thyristors are used for switching operations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=PWM" title="PWM">PWM</a>, <a href="https://publications.waset.org/abstracts/search?q=SVM" title=" SVM"> SVM</a>, <a href="https://publications.waset.org/abstracts/search?q=PFC" title=" PFC"> PFC</a>, <a href="https://publications.waset.org/abstracts/search?q=bidirectional%20inverters" title=" bidirectional inverters"> bidirectional inverters</a>, <a href="https://publications.waset.org/abstracts/search?q=snubber" title=" snubber"> snubber</a> </p> <a href="https://publications.waset.org/abstracts/16520/digital-control-techniques-for-power-electronic-devices" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16520.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">572</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1</span> High-Frequency Full-Bridge Isolated DC-DC Converter for Fuel Cell Power Generation Systems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nabil%20A.%20Ahmed">Nabil A. Ahmed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> DC-DC converters are necessary to interface low-voltage fuel cell power generation systems to a higher voltage DC bus system. A system and method for generating a regulated output power from fuel cell power generation systems is proposed in this paper, this includes a soft-switching isolated DC-DC converter to reduce the idling and circulating currents. The system incorporates a high-frequency center tap transformer link DC-DC converter using secondary-side soft switching control. Snubber capacitors including the parasitic capacitance of the switching devices and the transformer leakage inductance are utilized to achieve zero-voltage switching (ZVS) in the primary side of the high-frequency transformer. Therefore, no extra resonant components are required for ZVS. The inherent soft-switching capability allows high power density, efficient power conversion, and compact packaging. A prototype rated at 6.5 kW is proposed and simulated. Simulation results confirmed a wide range of soft-switching operation and consequently high conversion efficiency will be achieved. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=secondary-side" title="secondary-side">secondary-side</a>, <a href="https://publications.waset.org/abstracts/search?q=phase-shift" title=" phase-shift"> phase-shift</a>, <a href="https://publications.waset.org/abstracts/search?q=high-frequency%20transformer" title=" high-frequency transformer"> high-frequency transformer</a>, <a href="https://publications.waset.org/abstracts/search?q=zero%20voltage" title=" zero voltage"> zero voltage</a>, <a href="https://publications.waset.org/abstracts/search?q=zero%20current" title=" zero current"> zero current</a>, <a href="https://publications.waset.org/abstracts/search?q=soft%20switching%20operation" title=" soft switching operation"> soft switching operation</a>, <a href="https://publications.waset.org/abstracts/search?q=switching%20losses" title=" switching losses"> switching losses</a> </p> <a href="https://publications.waset.org/abstracts/44935/high-frequency-full-bridge-isolated-dc-dc-converter-for-fuel-cell-power-generation-systems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/44935.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">310</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" 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