<![CDATA[ IEEE Transactions on Power Electronics - new TOC ]]>
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TOC Alert for Publication# 63 2017December 14<![CDATA[Table of Contents]]>333C1186660<![CDATA[IEEE Power Electronics Society]]>333C2C261<![CDATA[An Adaptive Resonant Regulator for Single-Phase Grid-Tied VSCs]]>333186718734300<![CDATA[Impact of High-Temperature Storage Stressing (HTSS) on Degradation of High-Voltage 4H-SiC Junction Barrier Schottky Diodes]]>n), and specific on-resistance ( $R_{{text{on-sp}}}$). However, it was interesting that the breakdown voltage ($V_{{text{BR}}}$) of the devices was decreased first and then increased as the storage time increased. With the analysis of the SiO_{2}/4H-SiC interface characteristics using metal-oxide-semiconductor structure fabricated simultaneously with the investigated 4H-SiC JBS on the same wafer and technical computer-aided design (T-CAD) simulations, trapped-electrons and holes located at the interface of SiO_{2}/4H-SiC on termination region are identified to be the basic reason causing the degradation of reverse characteristics in the devices.]]>33318741877476<![CDATA[Comparative Study of the Active and Passive Circulating Current Suppression Methods for Modular Multilevel Converters]]>333187818831228<![CDATA[Flexible Third Harmonic Voltage Control of Low Capacitance Cascaded H-Bridge STATCOM]]>33318841889932<![CDATA[High-Frequency, High-Power Resonant Inverter With eGaN FET for Wireless Power Transfer]]>$Phi _2$ inverter, a single-switch topology with low switch-voltage stress, and fast transient response. The implementation utilizes a recently available eGaN device in a low-inductance package that is compatible with operation in the 10 s of MHz switching frequency. In this letter, we present experimental measurements of the inverter in a WPT application and characterize the system performance over various distances and operating conditions. Before using MRC coils, we evaluated the performance of the class $Phi _2$ inverter with the eGaN FET. It delivered 1.3-kW output to a 50-$Omega$ load with an efficiency of 95% when a 280-V input voltage was applied. For WPT operation, we added the open-type four-coil unit with a diameter of 300 mm to deliver power over 270-mm distance. With the addition of MRC coils, the class $Phi _2$ inverter provided 823-W output power with 87% efficiency over 270-mm distance between coils.]]>333189018962203<![CDATA[A Versatile Resonant Tank Identification Methodology for Induction Heating Systems]]>33318971901769<![CDATA[A Modified DPC Switching Technique Based on Optimal Transition Route for of 3L-NPC Converters]]>333190219061764<![CDATA[Low-Noise Isolated Digital Shunt for Precision Class-D Power Amplifiers]]>$approx$ 0.6 in common measurement configurations.]]>33319071910484<![CDATA[Sensorless Control of IM Based on Stator-Voltage MRAS for Limp-Home EV Applications]]>limp-home mode operation of electric vehicles (EV) applications. The Vs-MRAS scheme uses the error between the reference and estimated stator-voltage vectors and estimates the synchronous speed. Unlike existing MRAS schemes, the proposed sensorless scheme does not require the measured nominal values of stator resistance, stator inductance, and rotor resistance. This scheme is insensitive to variations of the aforementioned parameters. Moreover, using the proposed scheme eliminates the need for slip calculation. The proposed scheme is implemented and experimentally tested in a lab environment, on a 19-kW IM, and also applied on an electric golf buggy, powered by a 5-kW IM. The experimental results show that the proposed scheme is immune to parameter variations and is consistent in vehicle-starting from standstill and hill-starting tests. This scheme is also free from drift problems associated with a pure integration and is stable in the field weakening region. The test-drive results from the golf buggy confirm suitability of the proposed Vs-MRAS scheme over a wide range of speeds for the purpose of TCD in EV applications.]]>333191119211238<![CDATA[A Communication-Less Distributed Control Architecture for Islanded Microgrids With Renewable Generation and Storage]]>333192219393147<![CDATA[Dynamic Matching System for Radio-Frequency Plasma Generation]]>$_{2}$ , C$_{4}$F$_{8}$, and SF $_{{6}}$ gases at 13.56 MHz and over the entire plasma operating range of up to 250 W.]]>333194019511452<![CDATA[More Symmetric Four-Phase Inverse Coupled Inductor for Low Current Ripples & High-Efficiency Interleaved Bidirectional Buck/Boost Converter]]>333195219662056<![CDATA[High Power Density Design for a Modular Multilevel Converter With an H-Bridge Cell Based on a Volume Evaluation of Each Component]]>333196719844107<![CDATA[Thermal Analysis and Balancing for Modular Multilevel Converters in HVDC Applications]]>333198519964839<![CDATA[A Simplified Space Vector Modulation for Four-Level Nested Neutral-Point Clamped Inverters With Complete Control of Flying-Capacitor Voltages]]>333199720063062<![CDATA[An LC/S Compensation Topology and Coil Design Technique for Wireless Power Transfer]]>LC /S compensation topology and consists of one inductor and two capacitors, is proposed. The constant-current-output (CCOut) characteristic of the newly proposed topology is analyzed in detail on the basis of the discussion about LC and CL resonant tank. The equivalent resistance of the rectifier, filter, and resistor circuit is also analyzed to simplify circuit analysis. Then, the current and voltage stress on each component and the system performance under imperfect resonant condition are studied with the help of MATLAB. The LCT is deliberately designed by the finite element analysis software ANSYS Maxwell as well because the coupling coefficient, primary, and secondary self-inductance have a significant impact on system efficiency, power level, and density. The LCT design approach employed in this paper can be extended to magnetic design of almost all WPT systems. Theoretical analyses are verified by both Pspice simulation and practical experiments. Practical output currents with transient loads show an excellent CCOut characteristic of LC/S compensation topology.]]>333200720252961<![CDATA[Quasi-Resonant Passive Snubber for Improving Power Conversion Efficiency of a DC–DC Step-Down Converter]]>on and zero-voltage turn-off of the switch, and to suppress the reverse recovery current of diode. At input voltage of 200 V, output voltage of 100 V, output power of 300 W, and switching frequency of 190 kHz, the snubber increased the power conversion efficiency η_{e} by 2.8% and stabilized the temperature of mosfet switch at ∼68 °C. The snubber worked well for both mosfet and insulated gate bipolar transistor (IGBT) switches without increasing the voltage stress. These experimental results show that the proposed snubber is very helpful for improving η_{e} of a dc–dc step-down converter that operates at a high frequency.]]>333202620341515<![CDATA[Comparative Analysis of Multilevel-High-Frequency-Link and Multilevel-DC-Link DC–DC Transformers Based on MMC and Dual-Active Bridge for MVDC Application]]>333203520491966<![CDATA[A Voltage Regulator for Power Quality Improvement in Low-Voltage Distribution Grids]]>333205020602016<![CDATA[An Improved Deadbeat Control for a Three-Phase Three-Line Active Power Filter With Current-Tracking Error Compensation]]>333206120722394<![CDATA[Real-Time Implementation of a Three-Phase THSeAF Based on a VSC and a P+R Controller to Improve the Power Quality of Weak Distribution Systems]]>pq theory to extract voltage and current harmonics as well as voltage unbalances. A proportional resonant (P+R) regulator is producing gate switching signals for the three-phase THSeAF. The generated duty-cycle waveforms will produce compensating voltage to rectify harmonic currents initiated from typical nonlinear loads. The device ensures a reliable and dynamically restored power supply on the load's point of common coupling by means of three auxiliary dc supplies. This paper describes mitigation of power-quality-related issues of a microgrid systems and smart distribution grids along with the proposed solution to enhance the power system performances. A combination of simulations and experimental laboratory results are carried out to validate the study.]]>333207320821941<![CDATA[Design of Distribution Devices for Smart Grid Based on Magnetically Tunable Nanocomposite]]>333208320993149<![CDATA[Analysis of Main Topologies of Shunt Active Power Filters Applied to Four-Wire Systems]]>333210021122810<![CDATA[An Improved Transformer Winding Tap Injection DSTATCOM Topology for Medium-Voltage Reactive Power Compensation]]>333211321262140<![CDATA[Leakage Current Suppression of Three-Phase Flying Capacitor PV Inverter With New Carrier Modulation and Logic Function]]>333212721351289<![CDATA[An MPC-Based ESS Control Method for PV Power Smoothing Applications]]>333213621441284<![CDATA[Isolated Modular Multilevel DC–DC Converter With DC Fault Current Control Capability Based on Current-Fed Dual Active Bridge for MVDC Application]]>dv/dt in the converter is mitigated with the quasi-three-level modulation. In this paper, the proposed converter is applied to integrate the battery energy storage to a MVDC grid as an example to illustrate its operation principles and fault current control capability. The operation principles are presented for both normal and dc fault conditions; the dynamic models are also derived not only under normal operation mode but under dc fault operation mode as well. The control systems under different operation modes are designed, respectively, based on the developed mathematical models. A downscaled 40-kHz 3-kW CF-MDAB prototype was built in the laboratory. The experimental results under both normal condition and dc fault condition verified the analysis as well as the control performance of the proposed converter.]]>333214521616615<![CDATA[Analyzing the Need for a Balancing System in Supercapacitor Energy Storage Systems]]>333216221711168<![CDATA[Modified Beta Algorithm for GMPPT and Partial Shading Detection in Photovoltaic Systems]]>$beta$ range and never overlook the GMPP. Furthermore, the proposed technique can inherently detect the PSC occurrence without setting any additional threshold parameters or periodical interruption, which is simpler and more effective. In order to verify the advantages of the proposed technique, a prototype with buck-boost converter was constructed. For a fair comparison, two popular GMPPT techniques were also implemented and tested in the same prototype under various scenarios. The performance improvement with the proposed technique for different PSCs has been validated by both simulation and experimental results.]]>333217221864006<![CDATA[An Isolated High-Frequency Link Microinverter Operated with Secondary-Side Modulation for Efficiency Improvement]]>333218722003264<![CDATA[Online Energy Management Systems for Microgrids: Experimental Validation and Assessment Framework]]>333220122152185<![CDATA[SOC Estimation of Lithium-Ion Battery Pack Considering Balancing Current]]>2 batteries. The SOC estimation error is limited to 0.3% during the charging process, and a reduction of 2.5% is achieved compared to an error of 2.8% based on the pack model. A reduction of 1% is achieved compared to an error of 1.5% based on the pack model during the discharging process. Compared to an error of 1.7% without considering balancing current, a reduction of 1.4% is achieved during the charging process.]]>333221622263218<![CDATA[An Analytical Method to Evaluate and Design Hybrid Switched-Capacitor and Multilevel Converters]]>333222722401594<![CDATA[A 15-mV Inductor-Less Start-up Converter Using a Piezoelectric Transformer for Energy Harvesting Applications]]>333224122531503<![CDATA[Single-Inductor Multioutput-Level Buck Converter for Reducing Voltage-Transition Time and Energy Overheads in Low Power DVS-Enabled Systems]]>333225422661059<![CDATA[A Novel Soft-Switching Interleaved Coupled-Inductor Boost Converter With Only Single Auxiliary Circuit]]>333226722816489<![CDATA[Design of a Class-DE Rectifier with Shunt Inductance and Nonlinear Capacitance for High-Voltage Conversion]]>333228222942765<![CDATA[Nonisolated Two-Phase Interleaved LED Driver With Capacitive Current Sharing]]>333229523061714<![CDATA[Single Discharge Control for Single-Inductor Multiple-Output DC–DC Buck Converters]]>333230723162318<![CDATA[Discrete Duty-Cycle-Control Method for Direct Torque Control of Induction Motor Drives With Model Predictive Solution]]>333231723291702<![CDATA[Hybrid DC Circuit Breaker and Fault Current Limiter With Optional Interruption Capability]]>33323302338876<![CDATA[A Gate Driver of SiC MOSFET for Suppressing the Negative Voltage Spikes in a Bridge Circuit]]>mosfet has low on-state resistance and can work on high switching frequency, high voltage, and some other tough conditions with less temperature drift, which could provide the significant improvement of power density in power converters. However, for the bridge circuit in an actual converter, high dv/dt during fast switching transient of one mosfet will amplify the negative influence of parasitic components and produce the significant negative voltage spikes on the complementary mosfet, which will threaten its safe operation. This paper proposes a new gate driver circuit for SiC mosfet to attenuate the negative voltage spikes in a bridge circuit. The proposed gate driver adopts a simple voltage dividing circuit to generate a negative gate-source voltage as traditional and a passive triggered transistor with a series-connected capacitor to suppress the negative voltage spikes, which could satisfy the stringent requirements of fast switching SiC mosfets under the high dc voltage condition with low cost and less complexity. An analysis is presented in this paper based on the simulation and experimental results with the performance comparison evaluated.]]>333233923531912<![CDATA[Bus Bar Design for High-Power Inverters]]>333235423671797<![CDATA[Double Vectors Model Predictive Torque Control Without Weighting Factor Based on Voltage Tracking Error]]>333236823802373<![CDATA[Carrier-Based Modulation Strategies With Reduced Common-Mode Voltage for Five-Phase Voltage Source Inverters]]>333238123941817<![CDATA[Static-Errorless Deadbeat Predictive Current Control Using Second-Order Sliding-Mode Disturbance Observer for Induction Machine Drives]]>333239524031835<![CDATA[An Open-End Winding Motor Approach to Mitigate the Phase Voltage Distortion on Multilevel Inverters]]>333240424162058<![CDATA[Torque Ripple Modeling and Minimization for Interior PMSM Considering Magnetic Saturation]]>333241724291605<![CDATA[A Low-Order Harmonic Elimination Scheme for Induction Motor Drives Using a Multilevel Octadecagonal Space Vector Structure With a Single DC Source]]>$V/f$ control and rotor field-oriented control, are presented to validate the effectiveness of the proposed drive scheme.]]>333243024371653<![CDATA[Simplified Finite Control Set-Model Predictive Control for Matrix Converter-Fed PMSM Drives]]>333243824461001<![CDATA[Combined Active Flux and High-Frequency Injection Methods for Sensorless Direct-Flux Vector Control of Synchronous Reluctance Machines]]>333244724571465<![CDATA[Torque-Ripple Reduction and Fast Torque Response Strategy for Predictive Torque Control of Induction Motors]]>333245824701658<![CDATA[Leakage Flux Modeling of Multiwinding Transformers for System-Level Simulations]]>333247124832065<![CDATA[Power Transfer Efficiency Analysis of Intermediate-Resonator for Wireless Power Transfer]]>$k_{12,rm {opt}}$ for WPT i-Rx systems and $k_{1r,rm {opt}}$ for WPT relay systems, respectively. The analytical result indicates that the quality factors of resonators have a great effect on determining their optimal positions. We also provide performance comparisons between the considered WPT systems. From the result, it is observed that $k_{12,rm {opt}}$ is always larger than $k_{1r,rm {opt}}$, which indicates that the optimal position of the Tx is closer to the i-Rx rather than the relay. Moreover, in this case, WPT i-Rx systems can attain a higher PTE than WPT relay systems. Performing experiments under a variety of scenarios, we verify that the analytical results are in concordance with the measured ones.]]>33324842493774<![CDATA[A Physical RC Network Model for Electrothermal Analysis of a Multichip SiC Power Module]]>333249425081971<![CDATA[Improved SiC Power MOSFET Model Considering Nonlinear Junction Capacitances]]>(mosfets) have been applied in high-power and high-frequency converters recently. To effectively predict characteristics of SiC power mosfets in the design phase, a simple and valid model is needed. In this paper, a simple improved SiC power mosfet behavioral model is proposed using SPICE language. Key parameters in the model are analyzed and determined in detail, including parasitic parameters of the power module, steady-state characteristic parameters, and nonlinear parasitic capacitances. The effect of negative turn-off gate drive voltage is considered and a continuously differentiable function is proposed to describe the gate–source capacitance. Experimental validation is performed under a double pulse circuit employing an N-channel power mosfet half-bridge module CAS300M12BM2 (Cree Inc.) rated at 300 A/1200 V. The main switching dynamic characteristic parameters of the model have been compared with those of the measured results. The results show that taking gate–source capacitance as a linear value as most previous models do will cause significant turn-on deviations between experiment and simulation results, while the improved model is more accurate compared with the measured results.]]>333250925173487<![CDATA[A Lumped Thermal Model Including Thermal Coupling and Thermal Boundary Conditions for High-Power IGBT Modules]]>RC lumps have limits to provide temperature distributions inside the device; moreover, some variable factors in the real-field applications like the cooling and heating conditions of the converter cannot be adapted. On the other hand, the more advanced three-dimensional (3-D) thermal models based on finite-element method (FEM) need massive computations, which make the long-term thermal dynamics difficult to calculate. In this paper, a new lumped 3-D thermal model is proposed, which can be easily characterized from FEM simulations and can acquire the critical thermal distribution under long-term studies. Meanwhile, the boundary conditions for the thermal analysis are modeled and included, which can be adapted to different real-field applications of power electronic converters. Finally, the accuracy of the proposed thermal model is verified by FEM simulations and experimental results show a good agreement.]]>333251825307307<![CDATA[Power Cycling Test Methods for Reliability Assessment of Power Device Modules in Respect to Temperature Stress]]>$(V_{{rm{CE_ON}}})$ and forward voltage $(V_{F})$ measurement circuits for wear-out condition monitoring of power device modules during power cycling test are presented. Finally, different junction temperature measurement strategies for monitoring of solder joint degradation are explained.]]>333253125512767<![CDATA[Online Evaluation Method of Electrolytic Capacitor Degradation for Digitally Controlled SMPS Failure Prediction]]>33325522558752<![CDATA[An Open-Circuit Fault Diagnosis Approach for Single-Phase Three-Level Neutral-Point-Clamped Converters]]>333255925704053<![CDATA[Design of Class E Power Amplifier with New Structure and Flat Top Switch Voltage Waveform]]>33325712579916<![CDATA[Fuzzy Predictive DTC of Induction Machines With Reduced Torque Ripple and High-Performance Operation]]>333258025873798<![CDATA[A Modified Feedback Scheme Suitable for Repetitive Control of Inverter With Nonlinear Load]]>333258826001708<![CDATA[Graphical Evaluation of Time-Delay Compensation Techniques for Digitally Controlled Converters]]>LCL-filtered grid-connected inverter was tested with the studied delay compensation methods. Simulations and experimental test results validate the effectiveness of the graphical comparisons and the proposed approach.]]>333260126142790<![CDATA[Fast Response of Deviation-Constrained Hybrid Controllers for Indirect Energy Transfer Converters]]>333261526293160<![CDATA[Virtual-Space-Vector PWM for a Three-Level Neutral-Point-Clamped Inverter With Unbalanced DC-Links]]>333263026421629<![CDATA[New Space Vector Modulation Strategies to Reduce Inductor Current Ripple of Z-Source Inverter]]>333264326541781<![CDATA[A Model Predictive Power Factor Control Scheme With Active Damping Function for Current Source Rectifiers]]>LC resonance, the proposed MPPFC uses a novel line reactive power reference estimator to achieve unitary input PF or maximum achievable input PF for a CSR at various operating states, and involves active damping function into itself to mitigate LC resonance at line side. An online capacitance estimation method is associated with the proposed line reactive power reference estimator to guarantee more accurate input PF control, and a novel damping current calculation method, which avoids the use of band-stop filter, is also designed for active damping purpose. In comparison with traditional linear control, the proposed MPPFC not only realizes input PF regulation, but also achieves better steady-state performance on meeting the grid code requirements. In contrast to traditional model predictive control (MPC) for a CSR, the proposed MPPFC achieve more accurate reactive power control. Moreover, it overcomes the challenge on the realization of active damping based on MPC, which extends the application of MPC into high-power MV CSR. Simulation on a high-power CSR (1 MVA/4160 V/139 A) and experiments on a low-power prototype (5 kVA/208 V/13.9 A) are both conducted to verify the effectiveness of MPPFC.]]>333265526674401<![CDATA[Half-Cycle Resonance Tracking for Inductively Coupled Wireless Power Transmission System]]>333266826791334<![CDATA[A New Fast Adaptive On-Time Control for Transient Response Improvement in Constant On-Time Control]]>T_{ON} operation. During the heavy-load step-up transient, the duty cycle becomes saturated and the inductor current increment becomes limited by T_{ON} and the minimum off time (T_{OFF$_$ MIN}) ratio, which can create a large undershoot at load step up. On the other hand, in the load step-down case, if the load step down occurs at the beginning of T_{ON}, a large overshoot can be created at the output. To solve this issue, this paper presents a method designed to increase the T_{ON} at load step up and then very quickly, decrease at load step down in order to reduce the undershoot and overshoot at output or otherwise save the output capacitor. In this proposed method, the increase or decrease of T_{ON} is proportional to the output change which eliminates the chance of any overcorrection or ring-back problem unlike the methods presented in prior forums. This feature enables the control to work seamlessly in a high-frequency load repetitive case in VR applications. Since this T_{ON} change occurs only in the transient period when duty cycle is saturated, it does not affect the small-signal property of the COT control. Moreover, the proposed methods are very much compatible with the state-of-the-art single and multiphase COT control structures. Simulation and test results in both single and multiphase operations are also presented in the paper to verify the proposed concept.]]>333268026891437<![CDATA[Model Predictive Control with Modulated Optimal Vector for a Three-Phase Inverter with an LC Filter]]>LC filter. Unlike other MPC methods, the proposed MPC strategy exploits the unconstrained optimal vector (OV) of the continuous-control-set (CCS) MPC to limit the control options for the unconstrained mode. First, the analytical OV is derived based on a least-squares optimization. If the input constraints are not violated, the OV is applied with a space vector modulation (SVM) technique like the CCS-MPC. Otherwise, the OV is scaled into the MOV and only three control options are online evaluated to reselect the control input. Experiments are conducted on a three-phase inverter test bed with a TI TMS320F28335 digital signal processor to validate the improvements of the proposed method, especially the robust performances and fast responses. The comparative results with the FCS-MPC show the superior performances of the proposed scheme with smaller steady-state error and lower total harmonic distortion due to the analytical OV with SVM, more robustness to parameter uncertainties due to the disturbance observer, and faster dynamic response due to the online reselection of control inputs.]]>333269027031369<![CDATA[Thermally Compensated Discontinuous Modulation Strategy for Cascaded H-Bridge Converters]]>333270427132862<![CDATA[Control Method for the Sheppard–Taylor PFC Rectifier to Reduce Capacitance Requirements]]>on and the other is turned off) into the control. So no extra hardware is added, which makes the proposed method cost-effective. A low electromagnetic interference emission is also achieved due to the continuous input–output currents. In addition, the proposed method can be extended to other topologies easily. This paper first gives the detailed analysis of the proposed control method, and then introduces the controller design. The selection of the passive components is also briefly discussed. Finally, the simulation and experimental results verify the effectiveness of the proposed control method.]]>333271427221289<![CDATA[Switching Frequency Determination of DC–DC Converters With Hysteretic Control]]>33327232729783<![CDATA[A PIMR-Type Repetitive Control for a Grid-Tied Inverter: Structure, Analysis, and Design]]>333273027392335<![CDATA[Predictive Speed Control With Short Prediction Horizon for Permanent Magnet Synchronous Motor Drives]]>333274027501076<![CDATA[Analysis and Mitigation of Interaction Dynamics in Active DC Distribution Systems With Positive Feedback Islanding Detection Schemes]]>LC networks that interact negatively with the CPLs leading to further deterioration of the system stability. 3) Because islanding in a dc system can be hardly detected with passive methods due the absence of the frequency and reactive power terms, DGs are usually equipped with active islanding detection methods to detect the grid disconnection state; however, the islanding detection schemes could negatively impact the distribution system stability. The analysis and mitigation of undesirable interaction dynamics in a dc distribution system considering the aforementioned practical characteristics are not reported in the current literature. In this paper, the interaction dynamics of a dc distribution system characterized by a high penetration level of CPLs, and DGs equipped with positive feedback islanding detection scheme are investigated. The factors affecting the system stability with a single and multiple DGs are thoroughly addressed. Further, a stabilizing compensation loop is proposed to mitigate the stability problems and poor damping capability. Detailed time-domain nonlinear simulations and experimental results validate the analytical results.]]>3332751277311438<![CDATA[An Experimental Assessment of Open-Phase Fault-Tolerant Virtual-Vector-Based Direct Torque Control in Five-Phase Induction Motor Drives]]>333277427841723<![CDATA[IEEE Power Electronics Society]]>333C3C353<![CDATA[Blank page]]>333C4C42