This paper presents a comparative study of three predictive current control schemes for permanent-magnet synchronous machine (PMSM) drives. The first scheme predicts the future evolution currents each possible configuration inverter legs. Then, switching state which minimizes given cost function is selected and applied during next sampling time. second uses modulator to apply two configurations legs computation period. Among these configurations, one leads null voltages. duration other...

This paper presents the implementation of a hybrid-control strategy applied to permanent-magnet synchronous-motor (PMSM) drive. Hybrid control is general approach for switching-based hybrid system (HS). class HS includes continuous process controlled by discrete controller with finite number states. In case ac motor drives, in contrast conventional vector like proportional-integral or predictive control, where inverter not taken into account controller, integrates model and considers state...

Silicon carbide (SiC) power devices can operate at much higher junction temperature than those made of silicon. However, this does not mean that SiC without a good cooling system. To demonstrate this, the model merged p-i-n Schottky (MPS) diode is presented, and its parameters are identified with experimental measurements. This then used to study ruggedness regarding thermal runaway phenomenon. Finally, it shown that, where purely unipolar would be unstable, MPS structure brings increased stability.

The reduced switching times of silicon carbide (SiC) components compared to Si in similar conditions are a great advantage from the point view efficiency, but, due high dv/dt and di/dt, conducted electromagnetic emissions increased. Therefore, availability method which can predict these is increasingly necessary. To best authors' knowledge, model that differential mode as well common for converter including sic devices has not yet been published. novelty work presented here integration...

This paper presents a control scheme suitable for systems composed of continuous process modulated in energy by power converter with finite number topologies. To track the reference values, topology is determined from criterion based on state variable model and taking into account possible topologies converter. The proposed hybrid applied to an electrical motor drive inverter coupled permanent magnet synchronous machine. An evolution which insures fixed modulation frequency also proposed....

The embedding of components in Printed Circuit Board (PCB) material is an attractive solution to improve the performance power converters 1 W-100 kW range by increasing density (exploitation unused volume PCB), reducing circuit parasitics (strip-line approach current distribution, shorter interconnects), and improving manufacturability (rationalization manufacturing process, automation). This paper presents a review technologies, with special focus on (passive, active) thermal mangement....

Modular multilevel converters (MMCs) have been recognized as the most attractive technology for high voltage direct current (HVDC) applications during last years. Their advantages include ability to freely control internally stored energy in distributed submodules (SMs) and independently AC DC powers. Recent studies showed that an MMC can take advantage of this degree freedom supply ancillary services with low requirements such frequency response or power oscillation damping by connecting...

This paper describes and evaluates an original boost converter able to harvest energy from low-power low-voltage power sources. Design sizing are made according specifications issued the stringent characteristics of microbial electric generators such as fuel cells desalination cells. The harvested is 10mW under input voltage Vin=0.3V (33mA current). design adapted a classical topology. It includes self-oscillating circuit for autonomous operation, simple analog maximum point regulation....

In this paper, the problem of robust performance analysis interconnected uncertain systems with hierarchical structure is investigated. The computational load associated such problems does not allow a direct application robustness usual tools. To overcome difficulty, we exploit and propose an algorithm to perform using integral quadratic constraint "propagation" along structure. This allows us establish tradeoff between computation time required conservatism obtained results. Furthermore, it...

Energy storage systems (ESS) can enhance the reliability of service in power with a high share renewable energy sources. A converter topology that integrate ESS directly into an HVDC system is presented this work. The consists branch submodules (ES-SMs) and inductor. ES-SMs are based on half-bridges, which connected to supercapacitor or battery by means dc/dc converter. scalable different voltage levels since elements distributed among all submodules, it provides degree redundancy. In work,...

This paper presents an original self-starting DC/DC converter for low-power and low-voltage applications such as energy harvesting from microbial fuel cells to supply electronic devices. Design is performed according specifications issued the stringent characteristics of cells. The harvested power reaches 10 mW under 0.3 V input voltage ten 1.3-liter experimental connected in parallel. adapted a boost topology. It includes self-oscillating sub-circuit autonomous operation simple analog...

In this paper, the EMC behaviour of a switching cell is studied in standardized environment, using both experiments and simulations. The environment model has been validated separately. emission SiC JFET Si MOSFET are compared. With simulation study shows good agreement with experiment up to 20 MHz while validity domain less than 500 kHz due simplistic included SABER library. experimental that perturbations measured at LISN 10 dB larger frequency range from 200 4 MHz.

This paper presents a discrete conducted electromagnetic (EM) interference filter optimization procedure, based on genetic algorithms. A macromodeling technique taking into account the load impedance, source emissions and parasitic components, including layout, is used to obtain an accurate solution for process. The latter searches among supplier passive component databases provides, given topology, optimal set of components available market. approach has been applied differential Class-D...

In this paper, a modelling method of 25 kV-50 Hz railway line, in frequency range from 0 to 5 kHz, is presented. A model proposed quantity current and voltage harmonics generated by traction converters different points the network. An equivalent circuit, taking into account skin effect for time-domain simulations, also proposed. new model, based on state space representation transfer functions developed simplify study interactions between several trains circulating line sector. As an...

The number of high voltage direct current (HVDC) links continue to increase over the years, most them, for offshore applications or bulk power transmission long distances. present paper evaluates possible development a (dc) grid in Europe given present, and future, HVDC links. Eight potential cases interconnection between close are suggested as starting scenario multiterminal network. need dc-dc converter its special requirements evaluated function interconnections. As an example, case study...

Energy storage systems (ESS) are often used to face grids stability problems, providing ancillary services.This paper introduces a modular converter integrate massive ESS built of supercapacitors an HVDC link.This approach stores big amount energy in single ESS, unlike other proposals that distribute the stored series-connected submodules.The topology consists two branches half-bridge and full-bridge submodules.Due nature must be able handle with large voltage fluctuations on one side, from...

The number of HVDC installations is increasing and the decarbonization power systems makes it necessary to install storage systems. It might become relevant assess synergies between both trends by connecting on DC side contribution this paper show feasibility design such a system provide three different ancillary services: oscillation damping (POD), fast frequency response (FFR), or wind smoothing. consists series connection sub-modules with energy devices connected each sub-module through...

This paper presents a control scheme for multilevel multi-cell converter. For this type of converters, load current and capacitor voltages must be jointly controlled. Moreover the real-time constraint is important. leads us to propose based on simplified state-space model. The model allows predicting state vector evolution every converter configuration. algorithm directly determines switching which minimizes simple cost function. A normalization variables proposed function calculation in...

Many research efforts have been dedicated to matrix converters for several years. As major technological issues are now solved, this structure will widespread in industrial applications, particular with AC motors. Current control is a key issue motor drives, so many schemes proposed. Some of them proposed at first inverters, were applied converters. Among algorithms used predictive shows very good performances. In paper new scheme converter- fed permanent magnet synchronous machine....

This paper proposes a method to study the impact of passive circuits such as filters, loads, and board layout on conducted electromagnetic emissions. The is dedicated power converters with N-active conductors ground conductor, followed by circuits. A sophisticated use impedance matrices allows high-frequency current prediction. system divided into functional called blocks. Each block modeled an matrix. fast matrix calculation permits association those obtain compact model represented Knowing...

Silicon carbide (SiC) JFETs are attractive devices, but they might suffer from thermal instability. An analysis shows that two mechanisms could lead to their failure: the loss of gate control, which can easily be avoided, and a runaway caused by conduction losses. Destructive experimental tests performed on dedicated system show latter mechanism is more severe than initially expected. A low resistance driver equipped with protections systems thus required ensure safe operation SiC JFETs.

In line with the trend toward continuous miniaturization and price reduction, it is crucial to analyze impact of uncertainties on performance electrical circuits. Performance evaluated for worst-case scenario in frequency domain by computing upper lower bounds. The purpose not only propose a method tolerance analysis but also provide an efficient suitable tool engineers that can be easily applied realistic engineering problems. proposed based robust (so-called μ-analysis) which well known...

Class-D audio amplifiers are switching circuits that produce serious Electromagnetic (EM) emissions and disturb the surrounding electronics. In order to reduce these emissions, electromagnetic compatibility (EMC) filters with ferrite beads used. However, contain magnetic materials have a nonlinear behavior. Thus, they an unfavorable impact on system quality. The common bead models do not take into account phenomena. predict signal quality, this paper using Jiles-Atherton material theory....