<![CDATA[ IEEE Transactions on Power Electronics - new TOC ]]>
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TOC Alert for Publication# 63 2019April 22<![CDATA[Table of contents]]>345C1399966<![CDATA[IEEE Power Electronics Society]]>345C2C244<![CDATA[A Fixed-Length Transfer Delay Based Adaptive Frequency-Locked Loop for Single-Phase Systems]]>345400040041168<![CDATA[A Rotation-Free Wireless Power Transfer System With Stable Output Power and Efficiency for Autonomous Underwater Vehicles]]>LCC–LCC compensated WPT prototype is built and the experimental results verify the theoretical analysis and simulations. The system can deliver 664 W with a dc–dc efficiency of 92.26% under the best case and 485 W with a 92.10% dc–dc efficiency under the worst case.]]>345400540081376<![CDATA[Compact Switched Capacitor Multilevel Inverter (CSCMLI) With Self-Voltage Balancing and Boosting Ability]]>345400940133089<![CDATA[A Novel Nine-Level Quadruple Boost Inverter With Inductive-Load Ability]]>345401440181588<![CDATA[Dual-Channel Push–Pull Isolated Resonant Gate Driver for High-Frequency ZVS Full-Bridge Converters]]>mosfet in one bridge leg operating at high-switching frequency. The characteristics of the proposed DPIRGD include capability to provide two isolated complementary drive signals, low-gate drive loss, and high reliability of the turn-off status. Compared to the previous gate driver suitable for the zero-voltage-switching full-bridge converters, the proposed DPIRGD achieves similar gate drive loss but implements low components enabling to reduce the drive cost and increase the reliability. The operation principle, loss analysis, optimum design, and comparison study of the DPIRGD are presented in detail. The experimental results are shown to verify the effectiveness of the proposed concept. This solution has achieved nearly 70.7% reduction in gate drive power loss compared to the conventional voltage-source drive circuit.]]>345401940242407<![CDATA[A Model Predictive Current Controlled Bidirectional Three-Level DC/DC Converter for Hybrid Energy Storage System in DC Microgrids]]>345402540302913<![CDATA[A Five-Switch Bridge Based Reconfigurable <italic>LLC</italic> Converter for Deeply Depleted PEV Charging Applications]]>LLC converter based on a five-switch bridge to charge the deeply depleted plug-in electric vehicle onboard battery packs. Due to the reconfiguration of the primary-side switch network, two resonant tanks could operate in integrated half-bridge, half-bridge, hybrid-bridge, and full-bridge modes. Thus, four operation modes are derived, with their normalized voltage gains scaled to 1:2:3:4, respectively. Those four modes enable a squeezed switching frequency span, which is close to the resonant frequency. Therefore, the efficiency performance over an ultra-wide output voltage range can be optimized. Zero-voltage-switching can be realized in all power mosfets over the entire load range. The operating principles, voltage gains analysis are briefed. A 1.1-kW-rated prototype converting the 390-V input to 100–420 V output, is designed and tested to validate the proof of concept. A total of 97.64% of peak efficiency and good efficiency over the full charging range is reported.]]>345403140352436<![CDATA[Small-Signal Model of Switched Inductor Boost Converter]]>34540364040745<![CDATA[Optimality in the Sense of Arm Current Distribution of MMC VSC-HVDC]]>34540414047734<![CDATA[A Modular Multilevel Converter With Ripple-Power Decoupling Channels for Three-Phase MV Adjustable-Speed Drives]]>3454048406314607<![CDATA[Lifetime Estimation of DC-Link Capacitors in Adjustable Speed Drives Under Grid Voltage Unbalances]]>LC filter in an ASD system quantitatively, this paper proposes a mission profile based reliability evaluation method for capacitors. Different from the conventional lifetime estimation, a nonlinear accumulated damage model is proposed for the long-term estimation, considering the nonlinear process of equivalent series resistor growth and capacitance reduction during the degradation. Based on the proposed lifetime estimation procedure, four case studies are investigated: first, lifetime benchmarking of capacitors in LC filtering and slim capacitor filtering configurations; second, scalability analysis for the lifetime of capacitors in terms of system power rating and grid-unbalanced levels; third, lifetime estimation of capacitors in the dc-link filter with long-term mission profile; and fourth, the impact of the capacitor sizing on the lifetime of the dc-link capacitor under grid-balanced and grid-unbalanced conditions. The results serve as a guideline for proper selection of dc-link configurations and parameters to fulfill a specification in ASDs.]]>345406440784271<![CDATA[An Air-Gap Shape Optimization for Fringing Field Eddy Current Loss Reductions in Power Magnetics]]>345407940864474<![CDATA[Analysis and Design of a High Power Density Flying-Capacitor Multilevel Boost Converter for High Step-Up Conversion]]>$^3$ (20 W/cm$^3$) overall power density.]]>345408740994122<![CDATA[DC–DC Boost Converter With a Wide Input Range and High Voltage Gain for Fuel Cell Vehicles]]>345410041113679<![CDATA[Analysis and Design of Multiphase Receiver With Reduction of Output Fluctuation for EV Dynamic Wireless Charging System]]>345411241244835<![CDATA[Large Step Ratio Input-Series–Output-Parallel Chain-Link DC–DC Converter]]>345412541364629<![CDATA[An Overview of Modular Multilevel Converters in HVDC Transmission Systems With STATCOM Operation During Pole-to-Pole DC Short Circuits]]>345413741608992<![CDATA[A Method for the Calculation of the AC-Side Admittance of a Modular Multilevel Converter]]>345416141723148<![CDATA[Implementing an Impedance Compression Network to Compensate for Misalignments in a Wireless Power Transfer System]]>345417341842838<![CDATA[Comparison of the Heat Transfer Capabilities of Conventional Single- and Two-Phase Cooling Systems for an Electric Vehicle IGBT Power Module]]>345418541943604<![CDATA[A Structurally Reconfigurable Resonant Dual-Active-Bridge Converter and Modulation Method to Achieve Full-Range Soft-Switching and Enhanced Light-Load Efficiency]]>$LCL$ resonant tank, which enables an accurate prediction of the phases of tank currents with respect to tank voltages, and therefore simplifies the realization of soft-switching. The effects of dead time are discussed and expressions for guiding the selection of appropriate dead time for ensuring soft-switching in practical implementation are derived. The proposed converter and the modulation scheme are experimentally verified with a 1.6-kW converter prototype, which demonstrates their merits in comparison with a nonreconfigurable, full-bridge DAB topology and conventional modulation schemes.]]>345419542075013<![CDATA[Dual-Voltage-Rectifier-Based Single-Phase AC–DC Converters With Dual DC Bus and Voltage-Sigma Architecture for Variable DC Output Applications]]>345420842226065<![CDATA[Design and Implementation of High Efficiency Control Scheme of Dual Active Bridge Based 10 kV/1 MW Solid State Transformer for PV Application]]>345422342385347<![CDATA[Frozen Leg Operation of a Three-Phase Dual Active Bridge Converter]]>345423942482187<![CDATA[Common-Mode Current Suppression of Transformerless Nested Five-Level Converter With Zero Common-Mode Vectors]]>345424942581995<![CDATA[HVDC Circuit Breakers Combining Mechanical Switches and a Multilevel PWM Converter: Verification by Downscaled Models]]>345425942691861<![CDATA[Investigating the EMI Mitigation in Power Inverters Using Delay Compensation]]>345427042784621<![CDATA[Optimization Method of CM Inductor Volume Taking Into Account the Magnetic Core Saturation Issues]]>345427942914325<![CDATA[Hybrid UP-PWM Scheme for HERIC Inverter to Improve Power Quality and Efficiency]]>345429243035640<![CDATA[Transformerless Bidirectional PWM Converter Integrating Voltage Multiplier-Based Cell Voltage Equalizer for Series-Connected Electric Double-Layer Capacitors]]>345430443154938<![CDATA[High-Efficiency Bidirectional Buck–Boost Converter for Photovoltaic and Energy Storage Systems in a Smart Grid]]>on for switches. However, operation in DCM causes high ripples in the output voltage and current, as well as low power-conversion efficiency. To improve the performance of the conventional converter, the proposed converter has a new combined structure of a cascaded buck–boost converter and an auxiliary capacitor. The combined structure of the proposed converter reduces the output current ripple by providing a current path and the efficiency is increased. A prototype was built and tested to verify the effectiveness of the converter. The proposed converter has a maximum efficiency of 98%, less than ${text{5.14}}{ text{V}}_{{text{p.p}}}$ of output voltage ripple, and less than ${text{7.12}}{ text{A}}_{{text{p.p}}}$ of output current ripple. These results were obtained at an input voltage of 160 V, switching frequency of 45 kHz, output voltage of 80–320 V, and output power of 16–160 W. The experimental results show that the proposed converter has improved performance compared to the conventional converter.]]>345431643285225<![CDATA[Accurate State of Charge Estimation With Model Mismatch for Li-Ion Batteries: A Joint Moving Horizon Estimation Approach]]>345432943427837<![CDATA[Transformerless Z-Source Four-Leg PV Inverter With Leakage Current Reduction]]>345434343524481<![CDATA[Fully Integrated Low-Power Energy Harvesting System With Simplified Ripple Correlation Control for System-on-a-Chip Applications]]>2, and the harvested power range is from 6 μW to 1.4 mW.]]>345435343614470<![CDATA[Principle and Robust Impedance-Based Design of Grid-tied Inverter with LLCL-Filter under Wide Variation of Grid-Reactance]]>LCL or LLCL) filter has been numerously studied. Note that a distributed power system may contain the capacitive load, the power factor correction (PFC) capacitor, and the long cable. During the design of grid-tied inverters, we should address the effects of the equivalent grid reactance, including both the inductive and the capacitive impedances, on the stability of system. Nevertheless, up to now, to the best knowledge of authors, the detailed parameter design method of the LCL- or LLCL-filter-based grid-tied inverter has not yet been introduced, when the capacitive grid impedance is addressed. In this paper, by using the passivity-based analysis, the detailed stability study on the LLCL-filter-based grid-tied inverter is carried out, when the grid reactance varies in a wide range. Based on the analysis, an exact and robust parameter design of system is proposed. Simulations and experimental results on a 220 V/2 kW prototype confirm that by using the proposed parameter design method, a high-performance grid-tied inverter system can be achieved under the rigid grid condition.]]>345436243744091<![CDATA[High Step-Up Resonant DC/DC Converter With Balanced Capacitor Voltage for Distributed Generation Systems]]>off current and switching loss significantly, and to achieve high power conversion efficiency. The resonant capacitor voltages remain in balance because the duty cycle of the primary-side switches is always set to 0.5, regardless of the input voltages and load variations. Design and analysis of the proposed converter are presented, and tests using a 400-W experimental prototype verify its superior performance.]]>345437543876106<![CDATA[Isolated Bidirectional DC–DC Converter With Quasi-Resonant Zero-Voltage Switching for Battery Charge Equalization]]>345438844066527<![CDATA[Family of Multiport Switched-Capacitor Multilevel Inverters for High-Frequency AC Power Distribution]]>345440744224558<![CDATA[Interleaved Active Clamp Forward Converter With Extended Operating Duty Ratio by Adopting Additional Series-Connected Secondary Windings for Wide Input and High Current Output Applications]]>off current, it can achieve high efficiency. Moreover, since all secondary switches can operate without floating gate drivers, the proposed converter can maintain simple structure and low complexity of gate driving circuits in the secondary side. The validity of this proposed converter is verified by the experimental results from 36V–72 V input and 12 V/500 W output for the dc/dc prototype.]]>345442344336992<![CDATA[A Self-Tuned Class-E Power Oscillator]]>$Q$ Class-E power amplifier (PA) are very sensitive to the values of the circuit components. Any mismatch between the nominal Class-E frequency and the input clock frequency could result in considerable degradation in the efficiency and much change in the output power. In this paper, we present a new self-oscillating Class-E PA, or so-called Class-E power oscillator (PO), whose feedback network is mainly constructed of a low-$Q$RC circuit. As a result, the phase response of the feedback network is almost flat around the operating frequency, and if the nominal Class-E frequency of the load network changes due to variations in the component values, the phase shift in the feedback network does not change considerably, and therefore, the Class-E operation of the circuit is substantially maintained. We also present a complete design procedure for the proposed Class-E PO. We have built and tested a sample Class-E PO based on the proposed circuit. At $V_{DD}= {text{4.5}},{text{V}}$, the measured oscillation frequency, output power, and efficiency of the circuit are 800 kHz, 0.96 W, and 89%, respectively. Simulation and measurement results confirmed that the efficiency and output power of the proposed Class-E PO have small sensitivities to the variations in the component values; therefore, we call the proposed circuit a self-tuned Class-E PO.]]>345443444495248<![CDATA[SiC Stacked-Capacitor Converters for Pulse Applications]]>${text{50}}% sim {text{75}}%$ voltage derating margin is typically required for the power devices. silicon carbide (SiC) mosfets are promising to improve radiation reliability owing to wide band-gap. However, the conventional converters with off-the-shelf commercial SiC mosfets cannot provide enough voltage margin accordingly. A stack-capacitor pulse converter topology is proposed to reduce the voltage stress of switching devices and capacitors and improve the voltage derating capability significantly. The main idea is to build high voltage with multiple low voltage stacks instead of single high voltage capacitors, so that SiC mosfets can be applied with improved voltage margin. The method is to charge the stack-capacitors in parallel with fast charging speed, and discharge in series for high pulse voltage. The converter operates at higher switching frequency, which reduces the weight and size of the magnetic components. A 300-kHz prototype with 18–28 V input and 1 kV/ 100 A output was built using 650 V SiC devices, demonstrating 75% reduction of the voltage stress of the capacitors and power devices compared with the conventional converters.]]>345445044645421<![CDATA[Multi-Winding Configuration Optimization of Multi-Output Planar Transformers in GaN Active Forward Converters for Satellite Applications]]>345446544795063<![CDATA[A New Grid-Connected DC/AC Inverter With Soft Switching and Low Current Ripple]]>345448044966486<![CDATA[An Interleaved Flyback-Typed LED Driver With ZVS and Energy Recovery of Leakage Inductance]]>off. In order to solve these problems, this paper presents a novel dc-to-dc converter that mainly consists of two interleaved flyback converters. Both active switches can achieve zero-voltage switching on without the use of any active clamp circuit or snubber circuit. In addition, the leakage flux energy can be delivered to the output by using two added diodes. It helps to reduce the voltage spikes on the active switches and improve circuit efficiency. The steady-state analyses at different operation modes and the mathematical equations for parameters design are provided. Finally, a 200-W prototype circuit for driving high-brightness light-emitting diodes (LEDs) is built and tested to verify the feasibility of the proposed circuit. The LEDs are dimmed from 100% to 10% full power. Satisfactory performances are obtained from the experimental results.]]>345449745082605<![CDATA[A Novel D-CLT Multiresonant DC–DC Converter With Reduced Voltage Stresses for Wide Frequency Variation Applications]]>on, whereas all the diodes obtain the zero-current-switching (ZCS) turn-on and quasi-ZCS turn-off. Switching losses are constrained to the minimum. To verify the feasibility of the proposed converter, a 330-W prototype is established and tested. The results demonstrate the experiments match well with the theoretical analyses. The peak efficiency has reached 95.2%, although a high-loss diode bridge is adopted.]]>345450945236142<![CDATA[Robust Model Predictive Control With Simplified Repetitive Control for Electrical Machine Drives]]>345452445355148<![CDATA[Improved Control Strategy for Fault-Tolerant Flux-Switching Permanent-Magnet Machine Under Short-Circuit Condition]]>3454536455716950<![CDATA[Inductor Current Feedback Active Damping Method for Reduced DC-Link Capacitance IPMSM Drives]]>LC resonance between the line inductor and the dc-link film capacitor is an important concern in the reduced dc-link capacitance interior permanent magnet synchronous motor drive system. In this paper, an active damping method based on the virtual damping resistor is applied to suppress the LC resonance and improve the drive system stability. The performance of the damping resistor is analyzed in a systematic level, and possible configurations have been analyzed to obtain the optimal solution, which is proved to be the inductor current feedback (ICF) damping method. In order to realize the equivalent damping effect, the dc-link voltage feedback is applied to emulate the ICF-based active damping method by a step-by-step approach. Meanwhile, the grid voltage distortion will stimulate additional harmonics of the grid current in the reduced dc-link capacitance motor drives. Hence a feedforward compensation method is applied to suppress the grid current distortion arising from the distorted grid voltage, which has not been investigated in the previous related researches. Harmonics of the grid current are reduced and requirements of EN61000-3-2 can be satisfied by applying the proposed method. Experiments on a compressor drive platform equipped with the reduced dc-link capacitance are performed to verify the effectiveness of the proposed method.]]>345455845685822<![CDATA[Four-Leg Converter for Reluctance Machine With DC-Biased Sinusoidal Winding Current]]>αβ-axis voltages, as same with conventional SVPWM, the proposed SVPWM can also generate γ-axis voltages without generating additional zero-sequence alternating voltages on the stator windings. The validity of the proposed converter and the corresponding modulation strategy has been demonstrated by simulation and experiment. The power loss and performance of the four-leg converter are compared with the traditional converter. Contrasting experiments show that the proposed topology can reduce power loss by about 15% at rated operation and achieve the same performance as open-winding inverters.]]>345456945806956<![CDATA[Gopinath Model-Based Voltage Model Flux Observer Design for Field-Oriented Control of Induction Motor]]>345458145926730<![CDATA[Improved Closed-Loop Flux Observer Based Sensorless Control Against System Oscillation for Synchronous Reluctance Machine Drives]]>345459346027173<![CDATA[A Non-Segmented PSpice Model of SiC <sc>mosfet</sc> With Temperature-Dependent Parameters]]>mosfet) with temperature-dependent parameters is proposed in this paper, which can improve the model's convergence and temperature characteristics. The non-segmented equations and the parameter-extraction method for the proposed SiC mosfet PSpice model are introduced first. Simulation and experiment results are given to verify the correctness of the model while considering the temperature-dependent parameters. The static characteristics of the model are verified by comparing the simulation curves with the static characteristic curves in the SiC mosfet's datasheet, and its dynamic characteristics are verified by comparing the simulation results with experimental results under different ambient temperatures (25, 75, and 125 °C) based on a double-pulse test platform. Moreover, the proposed non-segmented model, the conventional segmented model, and the model from the manufacturer are adopted and simulated in a full-bridge inverter. The simulation results show better convergence of the proposed non-segmented model. Therefore, an accurate and practical simulation model of SiC mosfet is provided for circuit design in this paper.]]>345460346123822<![CDATA[A Smart IGBT Gate Driver IC With Temperature Compensated Collector Current Sensing]]>$I_{C}$ and $I_{G}$) for a particular gate resistance ($R_{G}$). It allows a cycle-by-cycle measurement of I_{C} during both turn-on and turn-off transients without any extra discrete components. The temperature variation is compensated internally by the on-chip CPU using polynomial curve fitting. This technique only monitors the low-voltage signal at the gate terminal, without the need to handle any high-voltage signal on the collector/load side. Measurements using a double pulse test setup show an accuracy of ±0.5 A over the current ranges of 1–30 A for turn-on and 1–50 A for turn-off from 25 to 75 °C.]]>345461346278121<![CDATA[Robust Flux Estimation Method for Linear Induction Motors Based on Improved Extended State Observers]]>345462846407291<![CDATA[Three-Dimensional Frequency-Dependent Thermal Model for Planar Transformers in <italic>LLC</italic> Resonant Converters]]>LLC converters due to their variable high-frequency operation, making thermal modeling and heat transfer analysis tools necessary. The proposed 3-D frequency thermal model is obtained based on the lumped parameters network (LPN) according to different thermal resistances of the PT including convection, conduction, and radiation heat exchanges. It should be noted that not only the 3-D geometry effect of the core is applied to the proposed model, but thermal surface resistances are also considered to model the high-frequency operation effect. Moreover, the lumped capacitance thermal model is used to analyze the transient thermal variation of the transformer. The LLC resonant converter with two PTs, including EE58/11/38 and ER51/10/38 planar cores, is considered to show the compatibility of the proposed 3-D-frequency LPN model. In addition, the temperature distribution of different parts of the transformers is evaluated using finite element method modeling and compared with the proposed 3-D frequency-dependent LPN model. Experimental results confirm the improved accuracy of the proposed LPN model and show the proposed model predicts the temperature distribution in PTs with an error of less than 3%. Considering the improved accuracy and low computational time of the method, the proposed 3-D frequency-dependent model is a powerful and fast design tool to evaluate the temperature distribution for different designs, and so can be used to effectively optimize the transformer from thermal point o-
view.]]>345464146556012<![CDATA[Mitigation of Gap Losses in Nanocrystalline Tape-Wound Cores]]>D revealing a nonlinear relationship of the form loss ∝ $D^{alpha }$. α is approximately constant for frequencies of 10–200 kHz over the range of core widths typically used in power electronics, but α increases with gap length. Splitting the core into a number of subcores can therefore provide significant reductions in gap loss, especially with larger gap lengths. The results from a 300-A (peak), 200-A (continuous) inductor show that with three subcores and a gap length of 4 mm, the gap losses are reduced by 50%, and the hot-spot temperature is reduced by 24.5 °C. Using the technique it is estimated that the original inductor weight could be reduced by 40% with four split cores, making a significant impact on converter power density.]]>345465646645964<![CDATA[Mission Profile Based Reliability Evaluation of Capacitor Banks in Wind Power Converters]]>345466546774222<![CDATA[Circuit Models and Fast Optimization of Litz Shield for Inductive-Power-Transfer Coils]]>345467846883419<![CDATA[Circuit Theoretic Considerations of LED Driving: Voltage-Source Versus Current-Source Driving]]>$v$–$i$ characteristics. In this paper, we study the basic requirement of the driving circuits and discuss the proper approach to drive LEDs in view of their characteristics. We compare voltage source driving and current source driving, and discuss their relative advantages and constraints. We specifically introduce the use of circuit duality principle for developing new current-source-mode (CSM) drivers that are less known but are theoretically more versatile compared to their conventional voltage-source-mode counterparts. The study highlights the effects of the choice of driving circuits in terms of the number and size of circuit components used, duty cycle variation, sensitivity of control, nonlinearity and control complexity of LED drivers. We propose a CSM single-inductor multiple-output (SIMO) converter, which demonstrates the advantage of having inductorless and easily controlled current-source drivers, and present a comparison of the CSM SIMO converter with the existing SIMO converters. We further illustrate that a high-voltage-step-down ratio can be naturally achieved by the CSM high-voltage-step-down converter without the use of transformers. This paper presents a systematic and comparative exposition of the circuit theory of driving LEDs, with experimental evidence supporting the major conclusions.]]>345468947024083<![CDATA[A Neural Network Based Approach to Simulate Electrothermal Device Interaction in SPICE Environment]]>RC-based thermal model is generated, with a method published in a previous work. These two subsystems are coupled together in order to achieve a self-consistent electrothermal model. The modeling results are validated against experiments with very satisfactory results. The technique is explained in detail; advantages and limitations of the method are then discussed.]]>345470347102045<![CDATA[Reference Submodule Based Capacitor Monitoring Strategy for Modular Multilevel Converters]]>345471147214913<![CDATA[Experimental Investigation of Linear Cumulative Damage Theory With Power Cycling Test]]>345472247286784<![CDATA[A Comprehensive Review Toward the State-of-the-Art in Failure and Lifetime Predictions of Power Electronic Devices]]>345472947463419<![CDATA[Short-Circuit Fault Diagnosis Based on Rough Sets Theory for a Single-Phase Inverter]]>345474747646464<![CDATA[Extraction of Intrinsic Parameters of Lead–Acid Batteries Using Energy Recycling Technique]]>3454765477910288<![CDATA[Control Strategy of Single-Phase Active Front-End Cascaded H-Bridge Under Cell Fault Condition]]>off and maximize the capability of the system under the cell fault condition. Simulation and experimental results are provided to verify the effectiveness of the proposed scheme.]]>345478047936976<![CDATA[Analysis of an Online Stability Monitoring Approach for DC Microgrid Power Converters]]>345479448064455<![CDATA[Energy Feedback Control of Light-Load Voltage Regulation for <italic>LLC</italic> Resonant Converter]]>LLC resonant converter would have light-load voltage regulation problems due to the effect of parasitic capacitances in a high-frequency range. In this paper, an energy feedback control method is proposed to improve the light-load regulation capacity by using synchronous rectifiers (SRs). The SR bridges are controlled ahead of the primary inverter bridges to deliver the energy from load to source, reducing the output voltage independent of the load. Then the desired voltage can be achieved even in no-load conditions by regulating the operation time of the energy feedback mode. The gain, voltage ripple, and efficiency performances of the proposed control method are discussed based on the precise analysis and an accurate model of the converter. Moreover, the light-load operations of the LLC resonant converter are analyzed deriving the critical load condition. Finally, the proposed control method is verified by the experiments of a 12 V/8 A LLC resonant converter prototype.]]>345480748196083<![CDATA[Novel Space Vector Pulsewidth Modulation Strategies for Single-Phase Three-Level NPC Impedance-Source Inverters]]>345482048304766<![CDATA[Parameter Identification and Maximum Power Estimation of Battery/Supercapacitor Hybrid Energy Storage System Based on Cramer–Rao Bound Analysis]]>345483148433865<![CDATA[Modular Multilevel Series/Parallel Converter With Switched-Inductor Energy Transfer Between Modules]]>345484448523363<![CDATA[Current Harmonic Reduction Based on Space Vector PWM for DC-Link Capacitors in Three-Phase VSIs Operating Over a Wide Range of Power Factor]]>345485348674350<![CDATA[Predictive Duty Cycle Control With Reversible Vector Selection for Three-Phase AC/DC Converters]]>345486848829389<![CDATA[An Inductor Current Estimator for Digitally Controlled Synchronous Buck Converter]]>345488348946548<![CDATA[High-Stability Position-Sensorless Control Method for Brushless DC Motors at Low Speed]]>345489549033923<![CDATA[Inductance-Independent Nonlinearity Compensation for Single-Phase Grid-Tied Inverter Operating in Both Continuous and Discontinuous Current Mode]]>345490449197880<![CDATA[Approximate Discrete-Time Small-Signal Models of DC–DC Converters With Consideration of Practical Pulsewidth Modulation and Stability Improvement Methods]]>G_{vd}(z), in the discrete-time domain are derived. Based on the low-pass characteristics of the dc-dc converters and related properties of the matrix functions, approximate expressions of G_{vd} in the frequency domain are derived, which are simple and accurate up to half the switching frequency. Using the approximate G_{vd}, the stability of the three basic dc–dc converters under leading-edge and trailing-edge PWM is analyzed. It is shown that the stability of the buck converter is unaffected by the type of PWM, while the leading-edge modulated boost and buck–boost converters have better stability than the trailing-edge modulated ones. Since the trailing-edge modulation is commonly available in PWM controller integrated circuits, the modulation signal zero-order holding (ZOH) method and the inductor current feedback control method are proposed for use in the trailing-edge modulated boost and buck–boost converters to achieve the same effect of leading-edge modulated converters. Experimental buck and boost converters were constructed for verification of the accuracy of the proposed model and the validity of the proposed control schemes.]]>345492049365966<![CDATA[Quasi-Resonant Control for Harmonic Current Suppression of a Magnetically Suspended Rotor]]>345493749502547<![CDATA[Virtual Positive-Damping Reshaped Impedance Stability Control Method for the Offshore MVDC System]]>345495149667258<![CDATA[Modular Multilevel Converter Control Methods Performance Benchmark for Medium Voltage Applications]]>345496749807532<![CDATA[Active SOC Balancing Control Strategy for Modular Multilevel Super Capacitor Energy Storage System]]>345498149922186<![CDATA[Decentralized Interleaving of Parallel-connected Buck Converters]]>345499350061775<![CDATA[Corrections to “Model Predictive Control With Common-Mode Voltage Injection for Modular Multilevel Converter” [Mar 17 1767-1778]]]>et al. proposed a model predictive control with common-mode voltage injection for modular multilevel converters in the paper published in IEEE Trans. Power Electron., vol. 32, no. 3, pp. 1767–1778, Mar. 2017. As a part of implementation and analysis, a detailed mathematical model of various current components including input current ($i_s$), output current ($i_x$), and circulating current ($i_{xz}$) are developed. During the review, we found some minor mistakes in the discrete-time model of the circulating current. In this correspondence, the authors present a detailed derivation of the revised circulating current model.]]>34550075008111<![CDATA[IEEE Power Electronics Society]]>345C3C355<![CDATA[Administrative committee]]>345C4C451