Dissertations / Theses on the topic 'DC-DC Converter'
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Patil, Sandeep. "Analysis and Loss Estimation of Different Multilevel DC-DC Converter Modulesand Different Proposed Multilevel DC-DC Converter Systems." University of Toledo / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1396628125.
Full textWarren, James Raymond III. "Cell modulated DC/DC converter." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/37061.
Full textIncludes bibliographical references (p. 97-99).
A very high frequency converter roughly based on a class E topology is investigated for replacing a conventional boost converter circuit. The loss mechanisms in class E inverters are characterized, and metrics are developed to aid in device selection for high frequency converter. A (30 MHz) converter is developed based on a modified class E inverter, single diode rectifier, and cell modulation control architecture based on the Fairchild Semiconductor FDN361AN MOSFET identified by the device selection metrics. In addition to meeting the output specification of 1 W to 2 W, the converter has the ability to deliver up to 3W over its entire input voltage range of 3.6V to 7.2V. Converter efficiencies were realized ranging from from 71% to 81%. Finally, converter transient response to a 2:1 load step did not even exceed the transient ripple of the converter, approximately 100mV. Higher frequency design allowed for decreasing the magnitude of passive values, and in turn their corresponding physical size. Smaller magnitude components reduced the energy storage in the circuit, allowing for the improved transient response.
(cont.) A potential application for this research include integration of the circuit and/or passive components for further miniaturization. Potential applications that could take advantage of the significantly improved transient response are circuits facing load transients, or applications designed to actively modulate their supply voltage or power.
by James Raymond Warren, III.
M.Eng.
Lian, Yiqing. "DC/DC converter for offshore DC collection network." Thesis, University of Strathclyde, 2016. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=26896.
Full textChadha, Ankit. "Tapped-Inductor Buck DC-DC Converter." Wright State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=wright1578488939749599.
Full textChudý, Andrej. "DC/DC měniče pro průmyslové napájecí zdroje." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442795.
Full textSwaisi, Mahmoud. "DC distribution grid and the associated advanced DC/DC converter." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/43494/.
Full textJia, Hongwei. "Highly Integrated DC-DC Converters." Doctoral diss., University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3194.
Full textPh.D.
School of Electrical Engineering and Computer Science
Engineering and Computer Science
Electrical Engineering PhD
Pekuz, Cagdas. "Z-source, Full Bridge Dc/dc Converter." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612775/index.pdf.
Full textNisar, Kashif. "DC to DC converter for smart dust." Thesis, Linköpings universitet, Institutionen för systemteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-77247.
Full textRezaee, Ali. "WIDE RANGE BI-DIRECTIONAL DC-DC CONVERTER." Thesis, Mittuniversitetet, Institutionen för elektronikkonstruktion, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-41189.
Full textAl, Kzair Christian. "SiC MOSFET function in DC-DC converter." Thesis, Uppsala universitet, Elektricitetslära, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-415147.
Full textDI, LORENZO ROBERTO. "DC-DC Buck Converter For Automotive Applications." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2021. http://hdl.handle.net/10281/301996.
Full textThe advent of the power MOSFET ranks as one of the most significant developments in power electronics in recent years. While the vertical devices which appeared in the late seventies looked set to find an important place in the market, particularly in the area of high-frequency power conversion, the overall dominance of the power bipolar transistor did not seem seriously threatened. However, when the more easily manufacturable vertical DMOS devices appeared in volume in 1978, the scene was set for a revolution. The power MOSFET rapidly achieved a reputation for being forgiving and easy to design with, but universal acceptance was delayed by its relatively high cost. The automotive electronics operating from car battery experiences transient voltages such as cold-cranking and load dump which can range from 4.5V to >30V. In addition, the new technologies such as start-stop, increase the frequency of such transients and operational requirements of electronic devices. This requires o-battery power ICs to withstand harsh operating conditions and reliably provide power to the whole vehicle. As an example, the air condition, front/back car lights are supposed to keep their functionality during start-stop induced cranking conditions. This requirement can be efficiently and reliably fulfilled from DC-DC converters. The automotive industry is rapidly switching from filament lamps to new systems (LED) for front/back lighting as they perform better in terms of energy efficiency than the conventional ones. However, due to the electrical characteristics of these systems present in a car cannot be powered directly from the automotive battery. They require specialized driving circuits which can respond to the changing needs of the loads as their electrical properties change while maintaining the uniform current. DC-DC converters other the easiest way to power such the load with a constant current. As result Buck, Boost, Buck-Boost DC-DC converters for automotive applications are of great interest for the automotive industry. In particular, not addressed so far are monolithic solutions in Smart Power technologies. Smart Power technologies allow integrating power transistor, control logic and diagnostic on a single chip (SOC – System On Chip). Because high yield requirements they involve only highly mature, well-experienced processing steps. Because of low-cost requirements, a reduced mask sequence is used, leading normally to two interconnecting levels (polysilicon and metal). In this thesis, it has been designed a DC-DC converter for automotive applications. The first chapter of this document is aimed to serve as an introduction to the reader for all the work descriptions along with the report. We need a high voltage technology to design an integrated DC-DC converter. Here, I will use smart power technology, this technology permits to create high side power switch with low resistance.
Kluempers, Eric C. "PSpice computer model of a dc-dc converter /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p1426076.
Full textWang, Xiangcheng. "HIGH SLEW RATE HIGH-EFFICIENCY DC-DC CONVERTER." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3196.
Full textPh.D.
School of Electrical Engineering and Computer Science
Engineering and Computer Science
Electrical Engineering
Nathan, Kumaran Saenthan. "A novel DC-DC converter for photovoltaic applications." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/288881.
Full textXu, Aidong. "Microprocessor controlled novel 4-quadrant DC-DC converter." Thesis, Loughborough University, 1992. https://dspace.lboro.ac.uk/2134/19477.
Full textSALIMATH, ARUNKUMAR. "SIMO DC-DC Converter for Automotive Audio Amplifier." Doctoral thesis, Università degli studi di Pavia, 2018. http://hdl.handle.net/11571/1214878.
Full textModern auto industry is ubiquitously deploying electronic systems for several applications like control, infotainment and security among others in the vehicles. Automotive infotainment is a key segment for the growth of automotive electronics as the vehicles, both light and heavy, require radio, video, navigation-assistance and telematics systems for both entertainment and networking. Like any battery-operated systems, the automotive infotainment systems are required to provide high efficiency. One major constituent of in-vehicle infotainment being the radio, improving the overall efficiency of a car radio system is emphasized by the industry. In the state-of-the-art, the automotive audio amplifiers severely lack efficiency offering <40% in the mute condition. This research targets to improve the overall efficiency of an audio amplifier in a car radio by power supplying efficiently. A Single Inductor Multiple Output dc-dc converter is explored as a supply voltage generator for an automotive audio amplifier in a car radio. The presence of line and load fluctuations, together with wide range of operating temperatures, in the automotive environment pose major challenge to the voltage regulation. A systematic feasibility study and analysis of specifications brought out the equivalence between the target SIMO converter and a non-inverting buck-boost SISO converter. Based on the equivalence, equilibrium and small signal models for the SIMO converter are developed. A voltage-mode, error-based controller is designed to control the dynamics of the converter. A novel power switching stage is conceived to generate the supplies required in a multi-channel class-D power amplifier. The switch configuration is critical due the absence of a well-defined reference to one of the regulated outputs and the effect of package parasitics at high switching frequencies. The converter is charged synchronously and discharged quasi-synchronously to the loads. The switches are configured and driven optimally based on extensive simulations in the presence of package models to suppress the switching noise. In order to reduce the EM interference in the AM band of interest, the SIMO converter is switched at permissible high frequencies based on the EMI mask. The automotive-class SIMO dc-dc converter is designed and integrated with a state-of-the-art class-D audio amplifier using 110nm BCD process technology offered by STMicroelectronics. The SIMO converter provides a battery tracking boost and a ground referred buck outputs for driving the class-D power stage. A unique feature of the converter is the generation of a floating voltage across half battery to supply the DSP core of the amplifier. The converter starts-up as boost converter alone followed entering boost-assisted SIMO converter mode. The active area occupied is 2.5mm2. The switching frequency is 2-2.4MHz. The converter has a load capability to drive up to 4 channels of a class-D power stage with peak efficiency of 86% and peak output power of 2.8W. The ripple voltage on the regulated outputs is below 25mV. The SIMO converter is able to sustain the automotive battery crank and dump conditions across the battery variation range of 4.5-27V. A line regulation of 6.3-16.2mV/V and a load regulation of 0.16mV/mA are provided by the SIMO converter. In the presence of wide range of battery variations, the SIMO converter incorporates all the necessary protections circuits and under/over voltage interrupts through I2C communication.
Zhang, Jianxi. "LCL DC/DC converter and DC hub under DC faults and development of DC grids with protection system using DC hub." Thesis, University of Aberdeen, 2016. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=231428.
Full textKhopkar, Rahul Vijaykumar. "DC-DC converter current source fed naturally commutated brushless DC motor drive." Texas A&M University, 2003. http://hdl.handle.net/1969.1/1257.
Full textSikora, Roman. "DC-DC měnič pro matrix beam modul." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413161.
Full textHan, Sangtaek. "High-power bi-directional DC/DC converters with controlled device stresses." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/49010.
Full textSaha, Pradip Kumar. "Nonlinear modelling and bifurcations in the rectified DC voltage FED DC-DC boost converter." Thesis, University of North Bengal, 2006. http://hdl.handle.net/123456789/612.
Full textQuerol, Borràs Jorge. "MCU Controlled DC-DC Buck/Boost Converter for Supercapacitors." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101205.
Full textDetta arbete är inriktat på DC till DC konvertering, vad är en viktig funktion för att möjliggöra användningen av superkondensatorer för lagring av energi. En teoretisk studie och jämförelse av metoder, algoritmer och tekniker för program styrs DC-DC omvandlare har använts för att utveckla ett system vad som kan stega upp eller ner en DC variabel spänning och omvandla det till ett stabilt tillstånd spänning. Som ett resultat av en ny kontroll teori bygger på Bang-Bang kontroll har utvecklats med en ARM LPC1768 processor. Det genomfördes för att lösa de kommersiella omformare problemen eftersom de inte kan arbeta med superkondensatorer på grund av deras låga inre motstånd. Resultatet är en anordning vilken kan tillhandahålla en programmerbar spänning mellan 4,5 V och 25 V, kan hårdvaran att stödja upp till 6 A och det är möjligt att styra operativsystemet ström som flyter genom omvandlaren. Den kan användas med de superkondensatorer, såsom visas i detta arbete, men den kan också användas som en allmän plattform för spänning och energiomvandling. Dessutom har hårdvara möjlighet att arbeta med smarta nät via ethernet-uttag, solpaneler med MPPT algoritmer och äntligen, hantera energi mellan olika typer av DC spänningskällor och enheter.
Jain, Manu. "Bi-directional DC-DC converter for low-power applications." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0008/MQ39979.pdf.
Full textChen, Christine M. Eng Massachusetts Institute of Technology. "Integrated DC-DC converter with ultra-low quiescent current." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/84879.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 93-94).
Based on the LTC3588, the design of a bandgap reference and a comparator for use in the control circuitry of DC-DC converter with an ultra-low quiescent current of 150nA is presented here. Not only will this thesis discuss the challenges encountered over the course of designing circuits to operate at such low current levels, but it will also provide proof of concept silicon evaluation data of modified LTC3588 chips demonstrating that such low current operation is viable.
by Christine Chen.
M.Eng.
Leung, Hong Man. "SPICE simulation and modeling of DC-DC flyback converter." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36643.
Full textBandyopadhyay, Saurav. "45nm direct battery DC-DC converter for mobile applications." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/60149.
Full textIncludes bibliographical references (p. 65-66).
Portable devices use Lithium-ion batteries as the energy source due to their high energy density, long cycle life and low memory effects. With the aggressive downscaling of CMOS, it is becoming increasingly difficult to efficiently interface the low voltage, low power digital baseband and DSP of the mobile phone with the battery which maybe at voltages as high as 4.2V. This is efficiently done by a DC-DC converter which is a separate IC designed on an older generation process capable of handling high voltages. However, this requires an extra IC, thereby increasing the overall system cost. Here, a buck converter is demonstrated on a standard 45nm digital CMOS process which can be integrated with the 45nm digital core on the same die. This converter is capable of handling high battery voltages (2.8V to 4.2V) and delivers a regulated low voltage (0.5V to 1.1V) to the digital core. The converter can supply 20[mu]A to 100mA of load current. The peak efficiency of the converter is 87% for 73mW output at 4.2V supply and for the ultra low power levels, efficiency of 75% is obtained for a 20[mu]W load at 3V. Both pulse width modulation (PWM) and pulse frequency modulation (PFM) modes of control are used. A new digital pulse width modulator (DPWM) architecture is presented which provides 75% area savings over the conventional delay line and counter based architecture with comparable power consumption. The buck converter also requires Switched Capacitor (SC) DC-DC Converters to generate stacking regulators and regulator for the control circuitry. On the whole, the complete system integrates the Power Management Unit with the core for a single chip radio in 45nm.
by Saurav Bandyopadhyay.
S.M.
Goldberg, Andrew Franklin. "A radio frequency DC-to-DC resonant power converter." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/27944.
Full textMICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.
Bibliography: leaves 136-139.
by Andrew Franklin Goldberg.
Elect.E.
Duncan, Joseph 1981. "A global maximum power point tracking DC-DC converter." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33152.
Full textIncludes bibliographical references (p. 79-80).
This thesis describes the design, and validation of a maximum power point tracking DC-DC converter capable of following the true global maximum power point in the presence of other local maximum. It does this without the use of costly components such as analog-to-digital converters and microprocessors. It substantially increases the efficiency of solar power conversion by allowing solar cells to operate at their ideal operating point regardless of changes in load, and illumination. The converter switches between a dithering algorithm which tracks the local maximum and a global search algorithm for ensuring that the converter is operating at the true global maximum.
by Joseph Duncan.
M.Eng.
Pascoal, Fábio Miguel Ferreira. "Inductorless DC\DC converter." Master's thesis, 2016. https://repositorio-aberto.up.pt/handle/10216/85953.
Full textPascoal, Fábio Miguel Ferreira. "Inductorless DC\DC converter." Dissertação, 2016. https://repositorio-aberto.up.pt/handle/10216/85953.
Full textWei, Shan-Gte, and 魏尚德. "Wireless DC/DC Power Converter." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/85934216419485901074.
Full text崑山科技大學
電機工程研究所
104
In this paper, the wireless DC/DC power converter based on a full-bridge structure as the wireless power transmitter circuit will be examined. Using the series resonance principle consisted of the capacitors and inductors, the energy will be transferred from the transmitter to the receiver circuit, and the receiver is also a series resonance circuit consisted by a capacitor and an inductor which receives the energy from the transmitter and passing it through the bridge diode to load. Finally, a wireless transmission circuit with a power rating of 1789.7 watts and a distance of 15cm, switching at 82KHz and with carefully designed circuit parameters, the power switches can support zero voltage switching. The operating principles and equivalent circuit are analyzed in detail in this thesis. A protype is built and simulated using IsSpice software to verify the analytical predictions. Moreover, the maximum efficiency of the proposed series-loaded resonant converters throughout the overall operating period approximates 84%. Experimental results reveal the satisfactory performance of the proposed topologies.
Kao, Feng-Jun, and 高逢均. "Dual-Output DC-DC Converter." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/c9xj4q.
Full text國立高雄科技大學
微電子工程系
107
In this thesis,a dual-output DC-DC converter is developed.The developed dual-output DC-DC converter is configured by two DC-DC boost converter with common input source to generate two equalized DC output voltages.The developed dual-output DC-DC converter has the advantages of low ripple current and equalized DC output voltages.In addition,the coupling inductors is used to reduce the volume of filter inductors.A prototype is developed to evaluate the performance of dual-output DC-DC converter.
Chen, Shih-Wei, and 陳世偉. "Single-Inductor Tri-Output DC-DC Boost Converter and Dual-Output Quadratic DC-DC Buck Converter." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/uy3282.
Full text國立臺北科技大學
電腦與通訊研究所
97
There are two kinds of DC-DC converters presented in this study. One is the single-inductor tri-output (SITO) DC-DC boost converter, and the other one is the dual-output quadratic (DOQ) DC-DC buck converter. The proposed SITO DC-DC boost converter not only provides three output sources but also uses single inductor. The proposed DOQ DC-DC buck converter has a wider conversion ratio with ultra-low voltage for dual-output voltage sources. In this study, the methodology for controller design of DOQ DC-DC buck converter is given using average current-mode control. The proposed circuits have been fabricated with TSMC 0.35mm 2P4M CMOS processes. The experimental results showed that SITO DC-DC boost converter can operate with supply voltage form 2.5V to 3.1V, which is suitable for single-cell lithium-ion battery supply applications. The output ripple voltage is about 40mV with a 220-μF off-chip capacitor and 10-μH off-chip inductor. The output maximum load current is up to 300mA. The output voltage range is from 2.8V to 4.4V. The maximum power efficiency is up to 86.9%. The experimental results showed that DOQ DC-DC buck converter can operate with supply voltage form 4.5V to 5.5V. The output ripple voltage is about 50mV with a 10-μF off-chip capacitor and 5-μH and 6-μH off-chip inductor. The output maximum load current is up to 1A. The output voltage range is from 95mV to 1.25V.
Mallik, Dhara I. "Design of isolated DC-DC and DC-DC-AC converters with reduced number of power switches." Thesis, 2017. https://doi.org/10.7912/C2H652.
Full textThere are various types of power electronic converters available in recent days. In some applications (e.g. PC power supply), it is required to supply more than one load from a single power supply. One of the main challenges while designing a power converter is to increase its e ciency especially when the number of power switches employed is relatively large. While several loads are supplied from a single source, if the power loss in the switches cannot be reduced, then the expected utilization of using a single source is not very feasible. To reduce the loss and increase e ciency, the thesis presents a novel design with reduced number of switches. The scope of this thesis is not limited to the dc-dc converter only, the converter to supply three phase ac loads from a single dc source is also presented. This discussion includes an improved fault tolerant configuration of the inverter part. The generated waveforms from the simulations are included as a demonstration of satisfactory results.
Jiang, Ding-Da, and 江定達. "An Adaptable DC-DC Boost Converter." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/94874417372416286002.
Full text國立中興大學
電機工程學系所
94
In this thesis, existing modulation technology of switch regulator is investigated to design simple and low cost dc-dc converter. There are two control methods of existing switch regulators, i.e., pulse width modulation (PWM) and pulse frequency modulation (PFM), PWM control method is difficult to design in stability, while PFM is simple and high stability. In terms of efficiency, PWM has low efficiency in light load but high efficiency in heavy load. On the contrary, PFM has low efficiency in heavy load but low efficiency in light load. In terms of ripple PWM is better them PFM. Regarding the above characteristics, we select PFM current mode control method to design, and propose a novel control method which is the adaptable PFM technology. Its concept is very simple. When the converter converts power to load, it the load does not need so much energy, the unnecessary energy transfers to ripple. Thus a converter is designed to adapt charge power to varying loading to get optimum power conversion. The converter output ripple could be greatly reduced and the power is saved. This converter chip is designed and fabricated with TSMC 0.35µm 2P4M 5V Mixed Signal CMOS technology. The chip area is about 1.5 x 1.5 mm² and makes use of the novel technology of adaptable PFM. This technology can adapt frequency and duty cycle to varying loading to get optimum power conversion. The adaptable converter has average efficiency over 70% and maxima efficiency 82%. Under the same conditions, the efficiency of the adaptable converter higher than that of the conventional converter, However, the ripple is reduced about 64.3% than the conventional converters at 100mA loading current. This technology improves ripple in the PFM and efficiency in the PWM at light load.
劉育廷. "Digital Current Mode DC-DC Converter." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/91935440386309142214.
Full textAraújo, José Pedro Fortuna. "High Power Density DC-DC Converter." Master's thesis, 2015. https://repositorio-aberto.up.pt/handle/10216/89774.
Full textHsu, Hsiu-Chia, and 許家修. "Realization of DC/DC Boost Converter." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/40512164340173394360.
Full text國立交通大學
機械工程學系
101
DC/DC converter is one of the most popular power electronic converters owing to its simple structure and wide applications. One type of the DC/DC converter is boost converter. The thesis realizes three boost converters operating in two different range of switching frequencies, 33kHz to 100kHz and 100kHz to 600kHz, which modulate the duty ration to maintain the output power being stable by sensing the feedback signal of the output voltage. Furthermore, the thsis analize the composistion of the factor of power loss in the circuits to increase the efficiency, and replaces the switching element of traditional MOSFET Si-material by GaN HEMT to test the better electronic characteristic of GaN HEMT.
Araújo, José Pedro Fortuna. "High Power Density DC-DC Converter." Dissertação, 2015. https://repositorio-aberto.up.pt/handle/10216/89774.
Full textWang, Sheng-Yuan, and 王聖淵. "System integration of AC-DC and DC-DC Converter." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/9a3zhg.
Full text崑山科技大學
電子工程研究所
107
As the trend of electric vehicles is becoming clearer, the charging system is also charged by AC to DC. The main purpose of this thesis is to develop and discuss the application of an AC-DC and DC-DC integration. Can be applied to charging systems or other related consumer electronics. DC-DC Converter developed a system with DC48V, switching frequency of 60kHz~65kHz and power of 60W in the form of Flyback. And with AC-DC system.
Tong, Shi-cheng, and 童世承. "The Study of Bidirectional DC-DC Converter for DC System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/31838579125174523655.
Full text逢甲大學
電機工程所
98
In recent years, the development of green energy has received increasing national attention. It is foreseeable that the DC power supply system development and application, under the progressive development of green energy. The operation mode of bidirectional DC-DC power supply system will be as the current UPS. This design makes and improves to the bidirectional DC-DC power supply system, and the system is superposition half-bridge and full-bridge. The system features is the output voltage has a wide range of modulation under charging model. The power source is the DC bus and the load is batteries. At the frist, paper will introduction the basic DC-DC bidirectional switching cricuits, and description of operating principle of the cricuit of paper. Final, to prove the power coneverter is bidirectionality by experiment.
Yang, Chih-Wei, and 楊志偉. "Implementation of DC/DC Converter Driver IC." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/54049673779383549988.
Full text大葉大學
資訊工程學系碩士班
93
In order to reduce the power consumption the SOC(system on chip) design usually needs to use the different voltage levels. Moreover, the variable frequency technology is employed to change the frequency for the different function. Thus the power consumption can be reduce by using slow clock in low frequency circuits. Such variable voltage/variable frequency power management strategy is more important in the modern power management chip design. Therefore, in this paper, we employed a new variable voltage/variable frequency PWM(pulse-width modulation) circuit design. The variable voltage/variable frequency sawtooth generator (sawtooth oscillatior) is used to produce a stable sawtooth waveform in this paper. Moreover, some protection function is designed to fit the industrial requirements. This circuit is implemented by the 0.35μm processing of TSMC (Taiwan Semiconductor Manufacture Company). It can operate from 500KHz to 3MHz, supply voltage is 3.3V, total area is 0.436*0.436m2, and the power consumption is 4mW. From the simulation results, this excellent performance of the variable voltage/variable frequency PWM chip is verified.
沈柏年. "Suppression of Electromagnetic of DC-DC Converter." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/05596534576468928958.
Full text國立交通大學
電機與控制工程系所
97
Power DC-DC converters are notorious sources of electromagnetic interference in electronic products; therefore, suppression of EMI is an important topic in the design of switch-mode power converters. Conventional EMI suppression methods may employ LC filters and metal shielding, but this can significantly increase cost, size, and weight. In this paper we propose a chaos-based method to reduce peak EMI magnitude and spread the energy to a wide range of frequencies. This method is to add a chaos-modulation clock to a converter maintaining in regular period state, in order to create chaotic behaviors in the converter. Our results show that this method is effective in suppressing EMI in DC-DC converters without much impact on the performance of converters. System stability is also analyzed and discussed. Moreover, compared with conventional methods, the method can be easily implemented in CMOS technology.
Huang, Chien-Chung, and 黃建中. "BIPOLAR SYNCHRONOUS DC-DC BUCK CONVERTER DESIGN." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/97013166298125170114.
Full text大同大學
電機工程學系(所)
97
A DC-DC synchronous buck converter with soft start has been designed and simulated with 40V bipolar process. The overall circuit is designed based on a voltage-mode PWM controlled converter. The input voltage range is from +4.3V to +20V. Simulation results show that this converter with on-chip current sensor can operate at 200 kHz. The current limit is implemented by sensing the voltage drop across the bottom N-MOSFET RDS (ON). The soft start function is used to prevent large inrush currents upon power-up. The internal thermal protection circuit can protect the system when the temperatures exceed 150°C.
Chuang, Ming Nan, and 莊明男. "Design of Step-Up DC-DC Converter." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/74437840282860964610.
Full text國立清華大學
電機工程研究所
82
Higher switching frequencies of DC-DC converter, is made possible by power MOSFET transistor, and integrated- circuit pulse-width- modulating chip, which pack more control and supervisory features in a smaller volume. This work used conventional CMOS process technology to design three DC-DC step-up converters with different control methods, boost from adjustable input voltage to higher voltage (5V). layout example is also included in this work .
Vargas, Helena Isabel Pais Ferreira de. "Radiation-Hard Step-up DC-DC Converter." Master's thesis, 2013. https://repositorio-aberto.up.pt/handle/10216/72648.
Full textAlves, Nuno Martins. "High-Performance Isolated Bidirectional DC-DC Converter." Master's thesis, 2017. https://hdl.handle.net/10216/105515.
Full textBidirectional DC-DC converters have been gaining attention in the field of power electronics due to the increasing need of a controlled power flow between two DC buses. Typical applications can be easily listed, ranging from renewable energy production units to electric and hybrid vehicles. Such converters can feature characteristics as high power density and performance as well as isolation between each port. As a result, AddVolt has commissioned that such a converter should be included in its regenerative breaking solution. Within this dissertation, a bidirectional isolated DC-DC converter is proposed, and all aspects from literature review, modelling, design, simulation, implementation, testing and validation are deeply covered. A medium-power high frequency Dual-Active Bridge (DAB) converter is the chosen topology. After validation of both the topology and control structure in a computational environment, an experimental prototype is assembled and successfully tested. Galvanic isolation is granted and achieved by a self-designed and in-house wound high frequency transformer.
Alves, Nuno Martins. "High-Performance Isolated Bidirectional DC-DC Converter." Dissertação, 2017. https://hdl.handle.net/10216/105515.
Full textBidirectional DC-DC converters have been gaining attention in the field of power electronics due to the increasing need of a controlled power flow between two DC buses. Typical applications can be easily listed, ranging from renewable energy production units to electric and hybrid vehicles. Such converters can feature characteristics as high power density and performance as well as isolation between each port. As a result, AddVolt has commissioned that such a converter should be included in its regenerative breaking solution. Within this dissertation, a bidirectional isolated DC-DC converter is proposed, and all aspects from literature review, modelling, design, simulation, implementation, testing and validation are deeply covered. A medium-power high frequency Dual-Active Bridge (DAB) converter is the chosen topology. After validation of both the topology and control structure in a computational environment, an experimental prototype is assembled and successfully tested. Galvanic isolation is granted and achieved by a self-designed and in-house wound high frequency transformer.
Patterson, Oliver Desmond. "Pseudo-resonant full bridge DC/DC converter." 1987. http://catalog.hathitrust.org/api/volumes/oclc/15634707.html.
Full textTypescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 77-78).