BOOST CONVERTER
S.NO | TITLES | ABSTARCTS | Year |
PEC-1 | Input/ Output Current Ripple Cancellation and RHP Zero Elimination in a Boost Converter using an Integrated Magnetic Technique | This paper presents a novel integrated magnetic boost converter (IMBC) with both input/output current ripple cancellation and right-half-plane (RHP) zero elimination. The input inductor, output inductor, and the ripple cancellation network auxiliary inductor of the proposed IMBC have been integrated in one magnetic core. Two extra capacitors were added to achieve input and output current ripple cancellation. Therefore, the input current ripple of the IMBC dropped to one-twelfth of the original in a conventional boost converter, and the output current worked in continuous-conduction-mode with very small ripple. Meanwhile, the proposed IMBC has eliminated the RHP zero of the boost converter, which means higher bandwidth can be reached. The using of the integrated magnetic technique not only performs above advantages but also shows great potential for reducing the weight and volume of dc–dc converter. Finally, three 36 V input, 50 V output and 500 W prototypes operating at 100 kHz are implementedto verify the expected performance. The experimental results show that the proposed IMBC can achieve both input and output current ripple cancellation and RHP zero elimination with the maximum efficiency of 96.8%. All these advantages of the IMBC are very important especially in high dynamic response, high efficiency, and high-power application. | 2015 |
PEC-2 | High Step-Up Converter With Three-Winding Coupled Inductor for Fuel Cell Energy Source Applications | This paper presents a high step-up converter for fuel cell energy source applications. The proposed high step-up dc–dc converter is devised for boosting the voltage generated from fuel cell to be a 400-V dc-bus voltage. Through the three-winding coupled inductor and voltage doublers circuit, the proposed converter achieve high step-up voltage gain without large duty cycle. The passive lossless clamped technology not only recycles leakage energyto improve efficiency but also alleviates large voltage spike to limit the voltage stress. Finally, the fuel cell as input voltage source 60–90 V integrated into a 2-kW prototype converter was implemented for performance verification. Under output voltage 400-V operation, the highest efficiency is up to 96.81%, and the full-load efficiency is 91.32%. | 2015 |
PEC-3 | Derivation, Analysis, and Comparison of Nonisolated Single-Switch High Step-up Converters With LowVoltage Stress | This paper presents no isolated single-switch high step-up converters with low voltage stress. Based on the conventional fly back converter, one single-switch high step-up converter is derived. The voltage stresses on the switch and diodes are limited by using a clamping diode and voltage doublers structure. Also, to further reduce the voltage stresses of them, another single-switch high step-up converter is proposed simply by using one additional capacitor and rearranging the components. Thus, lower voltage rated switch and diodes can be used, which results in higher efficiency. The operational principle, analysis and design considerations of each converter are presented in this paper. The validity of this study is confirmed by the experimental results from24 V input and 250 V/125 W output prototype. | 2015 |
PEC-4 | The Worst Conducted EMI Spectrum of Critical Conduction Mode Boost PFC Converter | The switching frequency of the boost power factor correction (PFC) converter operating in critical conduction mode(CRM) varies in a line cycle, making the conducted electromagnetic interference (EMI) spectra of the converter appear great differences under different input voltage and load conditions. The EMI filter should be designed according to the worst conducted EMI spectrum of the converter, so as to suppress the conducted EMI of the converter to be lower than the standard limits under all working conditions. This paper analyzes the characteristics of the common-mode (CM) and differential-mode (DM) noise spectra of the CRM boost PFC converter, and discusses the effects of the varied switching frequency on the peak, quasi-peak (PK), and average (AV) conducted EMI spectra. It is revealed that, for the conducted EMI limits defined in EN55022 class B, which are specified within 150 kHz to 30 MHz, the EMI filters required for suppressing the QP spectra of the conducted EMI of the CRM boost PFC converter are larger than that for suppressing the AV spectra, and the QP values of the conducted EMI under all working conditions are lower than a certain maximum boundary. The input voltage and load conditions for the worst CM and DM noise spectra of the converter are derived in this paper, thus the repetitive measurements and numerical calculations are avoided. A CRM boost PFC converter prototype is fabricated, and the evaluation of the measured conducted EMI spectra and the EMI filter design example verified the theoretical analysis | 2015 |
PEC-5 | Robust Sliding-Mode Control Design for a Voltage Regulated Quadratic Boost Converter | A robust controller design to obtain output voltage regulation in a quadratic boost converter with high dc gain is discussed in this paper. The proposed controller has an inner loop based on sliding-mode control whose sliding surface is defined for the input inductor current. The current reference value of the sliding surface is modified by a proportional-integral compensator in an outer loop that operates over the output voltage error. The stability of the two-loop controller is proved by using the Rout– Hurwitz criterion, which determines a region in the Kp − KiPlane, where the closed-loop system is always stable. The analysis of the sliding-mode-based control loop is performed by means of the equivalent control method, while the outer loop compensator is derived by means of the Nyquist-based Robust Loop Shaping approach with the M-constrained Integral Gain Maximization technique. Robustness is analyzed in depth taking into account the parameter variation related with the operation of the converter in different equilibrium points. Simulations and experimental results are presented to validate the approach for a 20–100-W quadratic boost converter stepping-up a low dc voltage (15–25-V dc) to a 400-V dc level. | 2015 |
PEC-6 | A Non isolated Multiinput Multioutput DC–DC Boost Converter for Electric Vehicle Applications | A new nonisolated multiinput multioutput dc–dc boost converter is proposed in this paper. This converter is applicable in hybridizing alternative energy sources in electric vehicles. In fact, by hybridization of energy sources, advantages of different sources are achievable. In this converter, the loads power can be flexibly distributed between input sources. Also, charging or discharging of energy storages by other input sources can be Controlled properly. The proposed converter has several outputs with different voltage levels which makes it suitable for interfacing to multilevel inverters. Using of a multilevel inverter leads to reduction of voltage harmonics which, consequently, reduces torque ripple of electric motor in electric vehicles. Also, electric vehicleswhich using dc motor have at least two different dc voltage levels,one for ventilation system and cabin lightening and other for supplying electric motor. The proposed converter has just one inductor. Depending on charging and discharging states of the energy storage system (ESS), two different power operation modes are defined for the converter. In order to design the converter control system, small-signal model for each operation mode is extracted. The validity of the proposed converter and its control performance are verified by simulation and experimental results for different operation conditions. | 2015 |
PEC-7 | High-Frequency-Fed Unity Power-Factor AC–DC Power Converter With One Switching Per Cycle | This paper presents a power converter and its control circuit for high-frequency-fed ac to dc conversion. Based on the resonant technique, the input current is shaped to be sinusoidal and is forced to follow the high-frequency sinusoidal input voltage so as to achieve unity power factor. With the proper selection of the characteristic impedance of the resonant tank, the converter is able to perform the function of a buck, boost, or buck–boost converter. The initial condition of the resonant tank is used to control the output voltage gain of the converter. Since all the switches are operated at the fundamental frequency of the input ac source, the switching loss of the converter is small. A control scheme is also proposed for the converter. proof-of-concept prototype operating at 400 kHz is constructed and its performance is experimentally measured. Results show that the proposed converter operates as theoretically anticipated. | 2015 |
PEC-8 | Multicell Switched-Inductor/Switched-Capacitor Combined Active-Network Converters | High step-up voltage gain dc/dc converters are widely used in renewable energy power generation, uninterruptible power system, etc. In order to avoid the influence of leakage inductor in coupled inductors based converters, switched-inductor boost converter (SL-boost), switched-capacitor boost converter (SC-boost) and active-network converter (ANC) have been developed. With the transition in series and parallel connection of the inductors andcapacitors, high step-up voltage conversion ratio can be achieved. This paper discusses the characteristics of the switched inductor and switched-capacitor cell; makes some comparisons between the ANC and boost converter. Based on the aforementioned analysis, this paper proposed the multicell switched-inductor/ switched capacitorcombined active network converters (MSL/SC-ANC). The proposed converters combine the advantages of SL/SC unitand active-network structure. Compared with previous high step-up converters, the novel converter provides a higher voltage conversion ratio with a lower voltage/current stress on the power devices, moreover, the structure of proposed SL/SC-ANC is very flexible, which means the quantity of SL and SC cells can be adjusted according to required voltage gain. A 20 times gain prototype is designed as an example to show the design procedure. Theoretical
analysis and experimental results are presented to demonstrate the feature of the proposed converter. |
2015 |