ABSTRACT. Composite converter architectures consist of several dissimilar partial power processing modules, which are combined together to improve the overall system efficiency. Examples of known composite converters include input-series, output-parallel (ISOP) and input-parallel, output-series (IPOS) architectures. This paper shows how composite converter architectures can be synthesised systematically by enumerating all possible incidence matrices describing module interconnects. The procedure yields a total of seven valid composite converter architectures with two converter modules, in which at least one module is non-isolated. Four of these seven architectures represent novel composite converters. A reconfigurable hardware prototype is built, and steady-state experimental waveforms are demonstrated for two novel architectures, which feature more favorable step-down or step-up conversion characteristics compared to the well-known ISOP or IPOS configurations.

ABSTRACT. Comparative Evaluation of Ultra-Lightweight Buck-Boost DC-DC Converter Topologies for Future eVTOL Aircraft

ABSTRACT. This paper introduces a new design approach formultiphase nonisolated DC-DC topology. The design approachis based on a new generic hybrid cell that consists of bothcapacitor and inductor. Using a stand-alone cell, the approach contributes to a high modularity of the resulting converters andenables high conversion ratios at higher efficiencies. The unique interaction between the capacitor and the inductor result in asoft charging operation, which curbs the losses of the converter,and contributes to higher efficiency. The method was used tocreate a multiphase voltage regulator module VRM. The new converter significantly extends the effective duty ratio andlowers the voltage stress of the transistors, while delivering highcurrent to the output and has inherent current sharing tobalance the load between the phases. Experimental results of amodular interleaved three phase prototype demonstrate anexcellent proof of design methodology concept and agree wellwith the simulations and theoretical analyses developed in thisstudy. Typical applications are point-of-load (PoL) and voltage regulator modules (VRM)

ABSTRACT. This paper presents an auxiliary-assisted control scheme for fast transient response in 48V-to-1V automotive Point-of-Load (PoL) applications. An auxiliary AC-coupled Buck (ACB) converter regulates the output voltage based on an output-capacitor, Cout, current-based Hysteretic Current-Model-Control (HCMC) scheme. To dynamically control the auxiliary inductor current slew rate, a 4:1 Dual-Inductor Hybrid (DIH) DC-DC stage regulates the ACB capacitor voltage, Vaux. Adaptive voltage positioning of Vaux decreases the auxiliary capacitance by 40%, ACB RMS current by 28%, and main-stage peak current by 30 A. The system achieves a peak simulated efficiency of 92.6% with an output capacitance of only 640 μF.

ABSTRACT. Design automation is a vital trend in power electronics. Supported by meta-heuristic techniques such as genetic optimization, it greatly helps to explore possible, initial converter designs. The core challenge is, however, that each design variable adds a dimension to the optimization problem.

This paper introduces an analytical modelling technique that utilizes multi-dimensional matrix calculations. Such vectorized calculations are very efficiently performed in softwares like MATLAB. The proposed method allows to assess a multitude of converter parameters, from rms values up to Fourier spectra, in very little time and massively speed up the evaluation of a candidate converter design.

The proposed method is embedded in a genetic algorithm that further speeds up the optimization process. Exemplary results of the entire optimization framework are shown for a 100 kW, three-phase dual-active bridge converter.

ABSTRACT. With the prevalence of the electric powertrain in electric aircraft and vehicles, the need for systematic guidelines that gauge passive component gravimetric energy density for weight-optimized converter design has become apparent. Observing a lack of data and corresponding modeling process for passive components that usually dominate a converter's weight, this work proposes a transformation that estimates the passive component gravimetric energy density from comprehensively surveyed volumetric energy density data and empirical specific density models, and thus forms a convenient guideline for converter weight optimization.

ABSTRACT. Inductor designs with large dc current relative to ac ripple are often saturation-limited, but these designs also often greatly underutilize the core material's flux carrying capabilities. Instead of using the full flux swing range from reverse saturation to forward saturation, these designs typically only use half the range. To use the full range, we propose a permanent magnet (PM) hybrid core in which a PM provides a dc flux offset in the core while being placed outside of the main winding flux path. In this work, we derive first-order theory for designing and analyzing the PM hybrid core. We then demonstrate a working proof-of-concept prototype using off-the-shelf parts. This prototype outperforms a comparable ferrite inductor design by achieving the same energy storage at half the dc resistance, thus demonstrating the potential benefits of the PM hybrid core.

ABSTRACT. This paper presents an implementation of a high frequency isolated resonant dc-dc converter, utilizing emerging micromagnetics technology. It shows that the class-E converter is a well suited candidate for fully integrated isolated power conversion. The design procedure of selecting parameters for this complex system as well as controller design are presented. A proof of concept 5V to 5V, 0.5W, 23MHz prototype was made, using discrete components chosen to scale with the microtransformer to emulate a fully integrated implementation. Strategy for regulation of the converter is presented and verified. 

ABSTRACT. This paper presents the concept of “Neural Network as Datasheet” for B-H loop modeling of power magnetics with sequence-to-sequence machine learning. Instead of presenting the measured characteristics of magnetic core material as raw measured data or a loss map, we use a neural network to capture the B-H loop mapping relationships of magnetic materials under different excitation waveforms, at different temperatures and different DC bias levels. The neural network can be used to rapidly predict B-H loops, saturation effects, and core losses under different operating conditions. Based on a recently developed large-scale magnetic core loss database – MagNet – we demonstrate that a neural network datasheet can compress and release information about power magnetics.

ABSTRACT. In dc-dc power converters, such as electric vehicle chargers, the inductor is crucial regarding cost, weight and volume. In this component, the power losses due to high-frequency effects are not negligible. Thus, a design method that includes these effects is proposed. An optimal inductor design is presented for a 15-kW electric vehicle charger, achieving efficiency > 99.8% and volume < 0.25 L. Additionally, a sensitivity analysis of the designs for two- and three-level converters is carried out showing, for instance, that the reduction of the inductance value does not always lead to a reduction in the inductor volume.

ABSTRACT. This paper presents a Power Hardware-in-the-Loop (PHIL) emulation test bench for emulating permanent magnet synchronous machines. The nonlinear machine is emulated with a sampling frequency of 5MHz and implemented on the FPGA of a new developed Real-Time Simulation System (RTSS). The RTSS based on the ZYNQ7030 System on Chip (SoC) from Xilinx and is also used to control the PHIL emulation converter. The PHIL converter is the novel Cascaded H-bridge based Parallel Hybrid Converter (PHC) with a 17-level output voltage and an effective switching frequency of 1MHz.

ABSTRACT. A hardware-in-the-loop setup to emulate a modular multilevel converter (MMC) with batteries integrated in its submodules is presented. This allows the testing of control methods without a real converter. A state-space MMC model is introduced, extended by RC battery models and implemented on an FPGA. The scalability of battery models for converters with large numbers of submodules is shown. The emulation closes the loop for a combined MMC-controller and battery management algorithm under test running on an ARM processor. Given the modular approach, the level of detail for power electronics, batteries and control schemes can be adapted independently.

ABSTRACT. In recent decades the flying capacitor multilevel converter (FCML) has been demonstrated to be a highly compact and efficient substitute for conventional switched inductive topologies. However, the fundamental dynamical behavior of the additional flying capacitor voltages has still not been well characterized to a predictable level for even the simplest phase-shifted PWM modulation strategies. This work presents a computationally efficient analytical model and methodology for describing the fully generalized buck FCML topology with a state-space dynamical representation. The model is successfully validated against a high-performance five-level hardware prototype.

ABSTRACT. This paper presents the design and analysis of a family of multistack switched-capacitor architecture and coupled magnetics for 48~V-to-1~V point-of-load voltage regulation modules (VRMs). The architecture uses multiple stages of unregulated switched-capacitor cells to generate multiple layers of cascaded terminals with reduced voltage levels. The reduced voltage levels are loaded by switched-mode power converters controlled as current sources to perform voltage regulation and soft charging. Switches of the switched-capacitor cells and the current source cells are merged to reduce the component count and improve the performance. The magnetic components in the current source cells are coupled and combined. The effectiveness of the topology family is verified by simulation and experimental results.

ABSTRACT. This paper investigates emerging capacitor technologies to address the need of high power density DC-DC switching converters. Existing modeling of DC-DC step-down switched capacitor converter (SCC) is employed in this work to benchmark different types of capacitors, such as standard MOS capacitor and emerging silicon capacitors. Two different silicon process dies assembly called 3D-SCC is introduced to benefit from higher performance of deep-trench capacitor (DTC) compared to native CMOS capacitors. Simulations quantify the power density gain e.g. 8 W/mm² vs 0.08 W/mm² for 3D-SCC and 2D-MOS SCC at 80% efficiency, respectively. Finally, design guidelines to optimize capacitor parameters are given to improve the capacitor design to be adopted in 3D-SCC.

ABSTRACT. A novel flying capacitor (FC) dc-dc converter topology that, compared to the conventional multi-level FC (ML-FC) topologies, has a more abrupt, exponential, drop in the FC voltages is introduced. The exponential FC uses extra switches to produce a lower inductor voltage swing for 4 or more FCs, thus, potentially, allowing for the use of smaller inductors. The converter also has different ripple distribution with respect to the conversion ratio, also allowing for a significant inductor size reduction at certain conversion ratios. The potential advantages of the exponential ML-FC are experimentally verified with a three-FC, 48 V to 5 V/ 3.3V/ 1V - 1A converter prototype with 100 kHz switching frequency, needing about three times smaller inductor than the 5-level ML-FC also requiring three flying capacitors.

ABSTRACT. This paper discusses the design and implementation of primary control for a grid forming inverter using TAPAS, a software defined inverter (SDI). The primary control consists of voltage tracking and frequency/angle tracking. The voltage tracking control requires current at the inverter's PWM terminals as state feedback. Such current is unavailable for measurement and is estimated using an observer. The measurements of frequency and angle(s) needed for frequency/angle tracking are noisy due to measurement noises and inherent delays. Conditioning of these feedback signals is discussed in detail, and the corresponding changes in the control design are provided. Effectiveness of the proposed design and implementation is demonstrated by the TAPAS implementation results.

ABSTRACT. As inverter-based distributed energy resources (DERs) attain an increasing penetration level in distribution network (DN), system fault current profiles may experience some major changes, which creates undesirable issues in system overcurrent relays (OCRs). This paper developed a comprehensive fault analysis approach which can precisely quantify the impacts of utility-scale inverter-based DERs’ interconnection on DN fault current profiles under diverse three-phase fault scenarios (including different DER penetration levels, fault severities and fault locations). Two potential issues in overcurrent protective relay caused by DER infeed were assessed: the desensitization effect and the fault downstream false tripping. Based on a utility-scale PV generation interconnected 10-bus DN testbed, PSCAD simulation results are provided in the purpose of verifying proposed methodology.

ABSTRACT. To facilitate the penetration of the distributed energy sources into the power grid and avoid grid inter-area oscillation problems, it has been proposed that the grid-tied inverter should be controlled to emulate the behavior of synchronous generators (SG). This type of control is implemented in virtual synchronous machines (VSM). Synchronverters are a special kind of VSM. We propose a modification of a synchronverter's control algorithm in order to decrease the inter-area oscillations in the power system. The change is to add a virtual damper winding to the control algorithm. The exact effect of the damper winding on the rotor rotation in the real synchronous generator is similar to the behavior of the rotor of the induction machine at low slip. The full theoretical analysis is complicated and demands several additional state variables. Instead, we derive the virtual damper winding torque from the existing state variables of the fourth-order model synchronverter and its terminal voltages. We assume that the virtual damping winding torque is proportional to the power angle derivative and is modeled by an equivalent viscous friction term in the swing equation. The decrease of the inter-area oscillations is verified by the simulation.

ABSTRACT. AC power converters can be prone to small-signal instability due to converter-grid interactions, especially when electrical resonances due to filters or series compensation are involved. Diagnosis and treatment of these issues is complicated by the MIMO nature of three-phase AC impedance models. This paper presents a stability criterion for grid-following inverters involving two SISO inner loops representing d and q axis interactions, and a thirder outer loop capturing dq cross coupling. These open-loop gains have a straightforward physical interpretation and algebraic relationship with the converter and grid models, allowing greater physical insight and ease of design using standard loop-shaping methods.

ABSTRACT. The increase of power electronic-based generators is causing inverters in grid-forming mode to become increasingly important. In addition, in grid-connected systems, there are applications where rapid dynamic responses are required. This highlights the limitation of static models, which are only valid for slow dynamics. Therefore, a small-signal state-space model is proposed and, using the droop control strategy, the controller is designed to enhance the rapidity of the system in a wide range of grids and operating points. Both the model and the control loops have been validated by means of simulation.

ABSTRACT. Transformer characteristics such as current distribution, loss, and leakage inductance are often predicted through hand calculations or FEA analysis, which are slow and labor-intensive.  A recently-developed analysis technique can predict transformer characteristics six orders of magnitude faster than FEA and is promising for use in analysis and especially optimization. The work presented here drastically improves the usability of this rapid prediction method by creating a software tool that can automatically generate winding configurations and analyze them at speeds of thousands-per-second. This paper covers the implementation of such a general software tool, called the Quick Simulator of High-Frequency Transformers (QuickSHiFT), demonstrates its user interface and utility for human analysis, and further provides examples of rapid brute-force optimization of 4-layer planar transformers.

ABSTRACT. Inductors, known as basic passive components, are the essential devices in power electronics converters. The high frequency characteristics, including parasitic capacitance, in inductors can introduce significant capacitive current to the system due to the fast-switching transitions facilitated by wide-band-gap (WBG) devices. To represent these important parasitic capacitance behaviors, equivalent-circuit representations using capacitors have been proposed, where the capacitor values are usually assumed to be positive resulting in a positive impedance characteristic. In this digest, the authors share an interesting finding of the negative impedance characteristics in a passive inductor, which are measured by a highly accurate impedance analyzer. Two different measurement methods are also implemented to measure the negative impedance behaviors as cross evaluations for ensuring correct measured results. The experimental results also reveal that the negative impedance characteristics of inductors can be compensated by paralleling ceramic capacitors with positive value. Perspectives, future work, and conclusions are addressed at the end of this digest.

ABSTRACT. This paper introduces a generalized optimization algorithm for the design of EE-core transformers using geometric programming. The objective functions, loss and volume, and the constraints must be either posynomials (positive polynomials) or monomials (products of variables with exponents) to conform to the requirements of geometric programs. We can optimize transformers and generate a set of optimal solutions to construct a Pareto front based on inputs from a user. The algorithm, modelling and constraints are described. The output of the optimization will then be compared to a experimental prototype to characterize the validity of the models.

ABSTRACT. Grid-connected converters typically require reactive buffering on the dc bus to maintain a constant dc power despite twice-line-frequency power pulsation. Compared to bulky passive capacitors, active buffers can process higher amounts of power with reduced capacitance requirements. We investigate a method for energy storage reduction in the capacitors of the series-stacked buffer (SSB) utilizing deliberate ac-side current harmonic injections within regulatory limits. This work outlines the theory behind harmonic injection in the active buffer and provides hardware verification showing appropriately injected harmonics can be used to reduce the energy stored and thus the capacitance required in each SSB capacitor.

ABSTRACT. Converters with Integrated Capacitor Blocked Transistor (ICBT) cells have modularity, scalability, low cell capacitor voltage ripples, and are promising in medium voltage, high power applications. A closed-loop control is essential to regulate cell capacitor voltages and ensure the safe operation of switching devices, cell capacitors and other components. The relationship between the gate signal timings and the cell capacitor voltages are analyzed and a cell capacitor voltage control is proposed and verified.

ABSTRACT. A main challenge in the use of an automotive ModularMultilevel Series Parallel Converter (MMSPC) is combininghigh efficient operation alongside active balancing of the distributedbatteries. To overcome this challenge a new modulationmethod is introduced. The aim of Target Current Modulation(TCM) is to have a high utilization of the total energy stored inthe batteries and therefore, an extended range of the poweredelectric vehicle (EV). The TCM algorithm calculates an optimalswitching state of the MMSPC to achieve a current distributionamong the single modules which fits best the precalculated targetcurrents for each battery. These target currents are a combinationof a loss optimal current distribution and offset currents thatare added to fulfill side conditions such as state of charge (SoC)balancing. Feasible battery current distributions are calculatedby a model-predictive approach and evaluated in each controlcycle. TCM is implemented on a field-programmable gate array(FPGA) and tested with a standardized automotive driving cycleon a test bench.

ABSTRACT. Modular multilevel converters (MMC) with the conventional control are subject to large capacitor voltage ripples, especially at low-line-frequencies. It has been proved that by introducing multiple changes of circulating current in one switching cycle, the capacitor voltage can be balanced in a single switching period. It fundamentally alternated the MMC characteristics, shifting the MMC from a long-deemed ‘line-cycle balancing’ converter to a ‘switching-cycle balancing’ converter. Yet the control is at the expense of high complexity and has significant difficulty with scalability. To address the challenge, the paper proposes a novel scheme, where the capacitor voltages are balanced in two adjacent switching cycles. The control complexity therefore becomes entirely independent of MMC cell numbers. The scheme is experimentally verified under both dc-dc and dc-ac operations. Test results under 24 kV dc-link voltage will be provided in the final paper performed with the custom-build 10 kV SiC MOSFET based 4-cell per-arm MMC prototype.

ABSTRACT. This paper introduces a multiphase hybrid boost converter with digital current-programmed controller for high conversion ratio, voltage step-up applications. The controller provides tight output voltage regulation while maintaining real-time current balancing capabilities for superior thermal distribution and converter efficiency. The controller includes a system governor unit which facilitates additional control aspects that are important for multiphase operation such as phase shedding, soft-start mechanism, and system protection. The SMPS operation is validated experimentally on a four-phase 12V-to-300V multiphase prototype with a maximal output power of 250W and power density of 2kW/Liter.

ABSTRACT. This paper proposes a novel five-port differential-power processing triple active bridge (DTAB) converter that provides active and hybrid cell-balancing for lithium-ion battery packs. The proposed DTAB converter significantly reduces the active battery balancing system cost by reducing component count per active balancing output. Five ports are supported from one TAB by using center-tapped transformers with interleaving inductors. Active balancing is achieved by controlling the differential current injected into the mid-point of the cell sub-modules using pulse-width modulation. Traditional phase-shift modulation is used to regulate the power of the load bus. Steady-state analysis and details of the proposed modulation scheme are provided together with simulation results for one five-port DTAB converter operated at 200 kHz that provides up to 160 W to a shared 15 V load bus using 4 series-connected 25 Ah NMC battery cells.

ABSTRACT. This digest presents several passive power-combining architectures to operate multiple inverters in parallel in high-power high-frequency capacitive WPT systems. A comprehensive methodology to design each of these power combining architectures with an objective to ensure balanced current sharing and minimal circulating currents between the paralleled inverters is presented. A novel circuit technique to maximize the power processing capability of each inverter module while ensuring complete soft-switching of the inverter transistors is also presented. Furthermore, a comparative study of these power combining architectures is performed to investigate their effectiveness in mitigating the timing and component tolerance related mismatches between paralleled inverters. Finally, the outcomes of this analysis are experimentally validated using a 6.78-MHz, 12-cm air-gap kilowatt-scale prototype capacitive WPT system implemented using two paralleled inverters.

ABSTRACT. Conventional linear controllers with active damping (AD) cannot stabilise LCL-filters for certain ranges of filter parameters due to resonances. This limits the design space of the filter design and can lead to sub-optimal designs in terms of filter volume and efficiency. When model predictive control (MPC) with a long-prediction horizon is applied, the inherent damping capability of MPC can stabilise the system despite the resonance phenomenon and expands the design space. In this paper, the limited design space due to insufficient damping of linear controllers with AD is analyzed based on capacitor current feedback AD. Exemplary LCL-filter optimization solutions and the resulting Pareto fronts are presented to illustrate the achievable volume and/or loss reductions with the extended design space. A novel MPC formulation is proposed to adopt explicit MPC and to enable a real-time implementation even at a high switching frequency. Simulation results validate the presented analysis.

ABSTRACT. With the rapid growth and development of high-density power converter topologies, including hybrid switched-capacitor converters, data-centers have seen a shift towards 48 V bus architectures for reduced transmission losses. In parallel, the automotive industry has similarly benefited from these advancements, with the proliferation of 48 V batteries allowing for reduced cable weight. However, the latter application space comes with additional challenges such as automotive-qualified component selection and the need to meet rigorous electromagnetic interference (EMI) standards. This work proposes a new interleaved-input, single-inductor Dickson converter with a high conversion ratio (8:1) for 48 V automotive applications. The impacts of operating frequency on efficiency and EMI performance are explored, as well as EMI mitigation techniques such as spread spectrum frequency modulation (SSFM). A hardware prototype was built to demonstrate these concepts, and was characterized with respect to the CISPR 25, Class 5 EMI standards required for many automotive applications.

ABSTRACT. This paper proposes analysis, control strategy, and procedure to achieve hot swapping operation of series connected power converters in an active battery reconditioning system for second life battery application. The proposed approach, control implementation, and transient analysis during the hot swapping are presented. The proposed approach allows the whole system to operate seamlessly and without any interruption when battery packs need to be disconnected for maintenance or replaced. A 100 V, 2 kW hardware system with 4 series-connected 25 V, 500 W converters is tested to validate the proposed analysis and operation.

ABSTRACT. This digest presents a methodology to design an onboard electric vehicle (EV) charger based on a dual-bridge series resonant converter (DBSRC). The operating modes of this single-stage ac-dc converter that offer soft-switching with reduced resonant-tank rms current are investigated in detail using a phasor-based analysis. A basis to select the switching frequency and transformer turns ratio of this converter is presented with an objective to achieve a high and flat efficiency profile. Finally, a universal-input, 3.7 kW, 200 V-500 V output onboard EV charger is designed using the presented methodology and its performance is compared with a fully soft-switched impedance control network (ICN) based resonant single-stage onboard EV charger.

ABSTRACT. The Flying Capacitor Multi-Level (FCML) converter is heralded as enabling the utilization of low-voltage switches within a high-voltage converter by evenly distributing the voltage stress on a series string of switches through the use of “flying” capacitors. However, this advantage of the converter requires that the flying capacitors stay in a balanced state regardless of transients, load disturbances, or other parasitics. Previous work has identified certain theoretic combinations of duty cycle and level count where the flying capacitors do not naturally balance. Although seemingly problematic, in practice this behavior is not observed in practical implementations. To resolve this discrepancy between FCML theory and experiment, we analyze the impact of switch output capacitance on the flying capacitor voltage balancing dynamics, and illustrate that this capacitance has a naturally balancing effect.

ABSTRACT. The study of the converter interaction with the grid, synchronization, controller design and stability assessment for 1phi grid-following (GFL) and grid-forming (GFM) power converters requires an efficient modeling tool to design universal grid-connected converters considering the different grid scenarios. From the initial time-periodic system, approximated linear time-invariant (LTI) models are obtained through dynamic phasors, linearization of variables represented in a virtual synchronous rotating reference frame (RRF) or linearization in the frequency domain, i.e. harmonic linearization. The accuracy and complexity of the obtained model depend on the method used. This work proposes to use the well-known envelope modelling approach used in resonant converters but requiring the time periodic input to generate its related phase synchronization signal for the model. The result is a simple and accurate LTI models of 1phi GFL and GFM for such stability studies. The proposed 1phi modeling approach is valid for any application with phase locked loop (PLL) synchronization. Here, it is described and validated with a 1phi totem-pole power factor corrector (PFC). Initial simulation results are provided and will be extended in the final manuscript.

ABSTRACT. In this paper, we propose an advanced synergetic charge-based mains current control (ASC) for three-phase power factor corrected (PFC) buck-boost current DC-link AC/DC converters, which integrate a front-end buck-type current DC-link PFC rectifier and a DC/DC boost converter output stage. We embed the charge control in the coordinated/synergetic control of the two converter stages, retaining all advantageous features like minimum number of switches operating at a given time and seamless transition between buck- and boost-mode. Compared to conventional synergetic current control (CSC), the ASC achieves a clear reduction of the AC-side current harmonics (simulated total harmonic distortion lower by up to 0.4%) for operation over a wide output voltage range from 200V to 1000V. The ASC concept is verified by detailed closed-loop circuit simulations emulating a real digital control system and, in the final paper, will be fully validated using a 10kW hardware demonstrator.

ABSTRACT. This paper presents a detailed analysis of a 6-pulse thyristor rectifier aimed at supplying high power electrolyzers. For this purpose, an analytical model of the three-phase controlled rectifier with AC-side inductance and constant-voltage load has been constructed. The different operating modes are identified and characterized. The derived equations are then combined with the electrical model of the electrolyzer, which allows to predict the operating point of the system. This model may serve as a useful tool for dimensioning thyristor rectifiers when operating with high power electrolyzers.

ABSTRACT. Mains-connected converters must correct the power factor to fulfill different power quality requirements. As a result, power factor correction (PFC) circuits have been developed in the 80s the past century and nowadays are mandatory. However, while most devices fed from rectifiers require a low voltage, most of the PFC today are based on Boost converters. Consequently, an additional conversion step between the rectifier and the target load is required. The cascade connection makes the power-supply system to be more expensive, larger, and less efficient. This paper presents a new rectifier topology, based on Buckboost converter, that will enable to supply a regulated step up / step down output voltage, over a wide range, while keeping all required power quality standards for a variety of applications.