Current harmonics are introduced in a distribution system due to the increasing utilization of nonlinear loads. Therefore, elimination of harmonics from supply current is an inevitable task to do. In this paper, an adaptive control technique called I-cos-theta (Icosθ) control algorithm along with a Kernel-based training method is proposed in a fuel cell-based Distributed STATic COMpensator (DSTATCOM)

This paper presents a comparison of prospective design concepts of DC/DC isolated converters for auxiliary drives of DC catenary fed light traction vehicles. Auxiliary drives are mostly dedicated to generate standard power grid supplying various on-board equipment and to charge on-board batteries. The DC/DC isolated converter consists of full-bridge (FB) converter feeding a high frequency transformer

(2020). Dear readers of EPE Journal. EPE Journal: Vol. 30, No. 3, pp. 105-106.

ABSTRACT This paper presents a study on the influence of different rectifiers on a super-high-speed permanent magnet generator (SHSPMG), which is used in a micro-gas turbine distributed generation system. Taking a 117 kW, 60,000 r/min SHSPMG as an example, the influence of PWM and uncontrolled rectifiers on the generator performances were studied comparatively. The current harmonics and its total harmonic

With growing decentralized power generation, medium-voltage (MV) dc-dc converters are becoming increasingly important. A three-phase dual-active bridge (DAB3) is a promising topology for high-power MV applications. The semiconductor devices used in such converters at multi-megawatt level tend to be slow in switching. Hence, a considerable dead time between switching instants is required to avoid shoot-through

ABSTRACT In this research paper, an Advanced Harmonic Filter (AHF) is designed and implemented for variable frequency drives of 55 kW rating. The AHF consists of a line reactor (Lo) and a Double Tuned Filter (DTF) to mitigate the 5th and 11th order harmonics of the drive current. The performance of AHF is verified using the MATLAB/Simulink platform. The complete design has been validated with experimental

ABSTRACT This paper presents the modelling of the DC–DC multilevel modular converter (DC–DC MMC) with half-bridge sub-modules and the control based on the inversion of its model. The DC–DC MMC presents many advantages such as its modularity, the absence of capacitors on the DC-bus voltage and a low switching frequency. This topology also preserves the intrinsic disadvantages of the MMC as the complexity

This paper presents a power balance technique for high power welding machines with a modular design using a common-mode-coupled inductor (CMCI). The voltage applied across the CMCI can automatically adjust current slopes of transformer primary currents to be equalized so that the power transfer between power modules can be balanced even in the structure in which both the primary side and secondary

This paper proposes an efficient LED lamp converter circuit incorporating dimming feature and multiple lamp independent control. The converter consists of a half-bridge resonant converter in series with a DC source. This converter operates at 200 kHz. Soft switching is employed with resonant power conversion. With modulation of the low frequency pulse width, the dimming feature is incorporated. The

In this article, predictive torque control (PTC) of multi-level inversion (MLI) fed open-end winding induction motor (OEWIM) drive has been developed with predictive angle control technique. The classical PTC of induction motor drive involves direct control of torque and flux. The combination of direct torque control (DTC) with model predictive control (MPC) offers all the features of classical DTC

Controlled Diode Bridge Clamped (CDBC) three level inverter configuration is the optimized version of T-type voltage source inverter in terms of power switches and their associated gate driver components. After a brief introduction of CDBC VSI, this paper implements the concept of Z-source inverter into this configuration. The three level SVPWM technique has been used for the generation of gating pulses

In this paper, two new structures are proposed for diode-assisted extended-boost continuous-current quasi-Z-source inverter (qZS). In the proposed structures to reduce the capacitors and diodes voltage stresses, a new switched inductor structure is used. Voltage gains of inverters in the proposed and conventional topologies have the same magnitude. Moreover, the startup inrush current in the proposed

This paper presents a modified topology for asymmetric modular multilevel inverter as a fundamental block. It consists of eight switches (including six bidirectional-conducting unidirectional-blocking switches and two bidirectional-conducting bidirectional-blocking switches) and four DC sources with unequal magnitudes, which generates 13-level output voltage. The proposed topology offers special features

The proposed light-controlled cascode is a power electronic device (or circuitry) which can be turned-on and -off by optical excitation. In contrast to the light-triggered thyristor, which can optically be turned-on but not -off, the proposed device allows optical turn-on and -off. Also, it allows a scalability of the blocking voltage by the extension to a light-controlled supercascode [1] which is

Nowadays there are vast enlargements in the grid applications; the control strategy of power electronics systems has also spread their locality extensively. Single processor of complex hardware is used in the conventional method, to generate the control strategy for microgrid. To avoid this issue, we cultivate a low-power microgrid with the help of NoC. Reconfigurable Double Tailed Sense Amplifier

We propose a resource efficient precision transient circuit simulator approach without time step for solving the systems of differential equations. The method is notably suitable for optimization and worst-case dimensioning of small-scale electronic circuits. A closed-form analytic solution is computed for each of the electronic circuit states. Numerical integration is not required, and therefore,

Switched reluctance motors operate at very high-speed ranges. At high speed, the switched reluctance motor drives are losing the capability of high torque production. In this paper, a novel method is proposed for controlling high speed switched reluctance motor using both continuous and discontinuous conduction modes. The proposed method controls the machine torque in continuous-conduction mode using

This paper proposes a novel Space Vector Pulse Width Modulation strategy extending conventional 2-D SVPWM strategies for its use in three-phase four-leg inverters. The methodology is based on the segregation of the zero sequence from any initial desired unbalance voltage set-points. In this way, the operation of the fourth leg is reserved to manage the desired homopolar component and to compensate

This paper presents a new control scheme for the ac-dc-ac nine-switch converter (NSC) with induction motor operated at constant frequency. The NSC at constant frequency operates optimally and its application for induction motor drive with re-active power compensation is proposed. In industries for various applications, induction motors are operated at constant frequency but at different loading conditions

This paper quantifies the soft switching loss of a 1.2 kV SiC MOSFET module via a calorimetric method in a 78 kW full-bridge resonant inverter switched at approximately 200 kHz. By switching the SiC MOSFET just before the zero crossing of the current during turn-off and at perfect zero voltage during turn-on, this converter yielded an efficiency of roughly 99 %. Then, a simplified laboratory setup

Modulation algorithms of indirect matrix converters (IMCs) are complicated and need powerful processors, such as DSP along with FPGA or CPLD for implementation. Using any extra hardware increases the cost and complexity and also reduces the reliability of the system. In this paper, a new realization for the space vector modulation (SVM) of the IMC is proposed so that it can be implemented by using

This paper presents an implementation of the voltage regulator module (VRM) DC-DC converter operating at 2 MHz using three interleaved switching cells whose outputs are magnetically coupled by monolithic intercell transformers (ICT). The innovation comes from the manufacturing of the ICTs. Spinel ferrite is sintered around two copper windings by pulsed electric current sintering (PECS), also called

An efficient ripple-free light-emitting diode (LED) driver circuit is proposed with zero-voltage switching (ZVS) and dimming control. The proposed driver circuit utilizes a full-bridge configuration. The LED lamp current is the sum of two inductor currents which are out of phase. This makes the LED lamp current ripple free. Larger portion of lamp power is supplied by the dc voltage source connected

In low power applications with isolation requirements (e.g. notebook adapters), the flyback converter is a commonly used converter topology. A key element of the flyback converter is its transformer. This paper introduces a flyback converter with a stepped air-gap transformer designed for a typical 65 W notebook adapter. Conventional flyback converters employ a transformer with a current independent

This paper proposes a non-isolated transformerless high step-up dc–dc converter. The presented converter voltage gain is higher that of the conventional boost, buck boost, CUK, SEPIC and ZETA converters. In addition, in this converter, only one power switch is utilized. The voltage stress across the power switch is low. Hence, the low on-state resistance of the power switch can be selected to decrease

This paper aims to improve the induction motor performances using a modified Direct Torque Control (DTC). The DTC is featured by its simple structure and fast dynamic response. Also, it does not require a speed sensor and it is less dependent on the motor parameters. However, the basic handicaps of this method are the torque ripples and the current distortions due to the presence of the hysteresis

The non-linearity of photovoltaic systems and the change in maximum power point with a level of insolation and temperature complicates the tracking of the maximum power point. Several maximum power point tracker methods have been proposed and implemented in literature. The paper studies a modified perturb and observe (P&O) approach for a photovoltaic system in order to extract the maximum power point

Avionics is intended to become more and more efficient in terms of energy saving thanks to increased efficiency of embedded system. Today, electricity is presented as the best energy vector compared to hydraulic or pneumatic. This is why current researches aim to focus on power electronic converters in order to meet the future electrical power demand in aircraft networks. In this article, the authors

In stand-alone power supply including a fuel cell (FC) and photovoltaic panels, DC/DC converters must meet several requirements from compactness, high voltage ratio, input current ripples reduction, high energy efficiency and reliability regarding keeping its function in case of power switch failures point of view. In this paper, a floating interleaved DC/DC boost converter has been chosen in order

This paper proposes quadratic-like single-ended primary inductance converter (SEPIC) converter, a DC/DC converter suitable for wide-input voltage range. This circuit can be gated at higher duty ratio compared with conventional SEPIC converter, while the voltage conversion ratio is low. This feature is beneficial for high-input voltage because it prevents the controller from falling into extremely low

This article presents a design of the three-phase Electric vehicle (EV) charger with a wide-output voltage range. The proposed charger is based on a voltage-fed/isolated power factor correction (PFC) converter followed by a non-isolated DC/DC converter. The three-phase PFC converter come from asymmetrical dual active bridge (ADAB) converter having zero-voltage- and zero-current-switching (ZV-ZCS) operation

This paper presents a low-rated midpoint DC-link capacitor hybrid shunt active power filter (HSAPF) embedded with sliding window (SW) based harmonic detection method for power quality enhancement in a medium-voltage distribution network. The novel composite current control technique utilizes SW based high pass filtering for determining the reference voltages, SW based low pass filtering for absorbing

The IDIM (Inverse Dynamic Identification Models) method is based on a closed loop identification of the inverse model which is linear in relation to the parameters. By mixing the OE (Output Error) method and the IDIM technique, we obtain the method called DIDIM (Direct and Inverse Dynamic Identification Models). Experimental results on decoupled identification of the electrical dynamic and the mechanical

This paper proposes a new control algorithm to operate an interleaved buck converter with an extended step-down ratio. The algorithm is to asymmetrically phase-shift the turn-on periods of the two active switches, i.e. partially overlapping the turn-on intervals. Therefore, one of the active switches can benefit from zero-voltage-switching (ZVS). This improves the power efficiency of a hard-switched

Permanent Magnet Motor drives is a widely used technology that offers many advantages, such as exceptional torque control and greater flexibility. Improvement of system reliability and system efficiency has become a heavily researched subject. Considering this research interest and taking into account the major developments in vertical transportation technology over the last several years, the utilization

The application of a resistor as a load of the pulse-width-modulated DC-DC converters has dominated the dynamic modelling since the development of the modelling methods in early 1970s. In 1990s, the research in the source and load interactions was very active providing valuable information to justify the necessity to develop unterminated dynamic models for characterising the dynamics of the converters

In this paper, a novel boost DC/DC converter is proposed. The existence of the three-winding coupled inductor in the proposed topology causes an increase in voltage gain. Another advantage of suggested topology is that by reducing the turn’s ratio of the coupled inductor the voltage gain of converter is increased. In the proposed converter the stored energy in the leakage inductance is recovered by

Silicon-Carbide (SiC) technology presents several advantages over silicon for power electronics applications, such as lower losses. However, SiC technology is not totally mature, and some reliability problems remain. This paper studies the robustness of SiC MOSFETs in the case of diode-less applications and the associated phenomena, such as gate oxide degradation. Several devices were stressed under

The Low Voltage Ride Through (LVRT) is an important requirement in fault conditions for any power system specially microgrids. When the fault occurs, the overcurrent and unbalanced voltage are yielded and these result in serious damages in inverter-based Distributed Generators (DGs) in the microgrid. To prevent this phenomenon, many types of research have been guided to limit the current in faulty

In Induction Heating (IH) cooking appliances more than one output is highly desirable. A three leg inverter is proposed for three output IH cooking application. It is operating with a constant frequency of 30.5 kHz and allows the power control in loads independently. On-off control technique in cyclic manner is used. The number of switching devices per load is two (i.e. one leg per load). Thus utilization

This paper considers the well-known problem of deriving a linear model of dynamics of periodically switched circuits w.r.t. small perturbations in duty cycle (or switching instances) as external control inputs. A rigorous approach to this problem is developed and is shown that the linearized model is shift invariant and discrete time in nature. This is at variance with the well-known model, which is

According to limited voltage gain of the standard step-up converters, cascade connection of the boost choppers can be employed to increase voltage gain. However, negative impedance instability problem due to converters constant power characteristic will complicate closed loop control of the cascaded converters. To cope with the problem, switched capacitor/switched inductor (SC/SI) circuits can be employed

This paper suggests a hybrid PWM DC/DC converter comprised of the Full-Bridge (FB) converter and the PWM resonant converter for on-board chargers. It has hybrid characteristics having output characteristics of the FB converter and switching characteristics of the PWM resonant converter. They are coupled in a single transformer so that the power distribution problem which causes increase of the transformer

This paper employs an intuitive feedback linearization (FBL) controlled induction motor (IM) drive incorporated with the modified neuro-fuzzy sliding-mode control (NFSMC) based speed and torque compensators. The proposed method substantially reduces the torque and speed chattering with the optimal drive performance under system uncertainties and disturbance. An intuitive feedback technique-based linearization

The increased application of multiphase (more than three-phase) synchronous motor requires it to be investigated from stability point of view. Therefore, this paper primarily addresses the stability analysis of a six-phase synchronous motor during steady-state operation using eigenvalue criteria from its derived linearized model. Based on the variation of dominant eigenvalues, region of instability

A coupled-inductor boost (CIB) converter is a popular solution for non-isolated high step-up applications since a high voltage gain can be easily achieved by adjusting the turn ratio of the coupled-inductor (CI). On the other hand, at the cost of utilizing a CI, a CIB converter requires voltage snubbers. In order to relieve the drawbacks caused by a CI and to further improve the efficiency, the pulse-width

EPE’13 ECCE Europe has been organized in Lille in September 2013 according to a carbon care philosophy. Different actions have been developed to reduce the equivalent greenhouse gases emitted by the conference. Moreover, mitigation actions have also been achieved after the conference to obtain a carbon-neutral conference. All these actions are described in this paper.

The Modular Multilevel Converter (MMC) is a power electronic structure used for high voltage adjustable speed drives applications as well as power transmission applications and high-voltage direct current. MMC structure presents many advantages such as modularity, the absence of a high voltage DC bus and very low switching frequency. It presents also some disadvantages such as modeling complexity and

Non-isolated switching power supplies with coupled-inductor have more parasitic elements like the leakage inductance in comparison with the regular non-isolated converters. Due to the undesirable resonances between the leakage inductance and other parasitic capacitors, the conducted electromagnetic emissions increase. In order to improve electromagnetic compatibility, adopting passive or active parasitic

In inductive power transfer (IPT), the possibility of load regulation (voltage or current regulation) in some resonant configurations has been reported in previous works. However, the underlying formalism is still incomplete or too involved, obscuring the fundamental aspects. In this paper, the author exposes the causes and possibilities of load regulation from the perspective of some equivalent models

(2017). Editorial. EPE Journal: Vol. 27, Symposium de Génie Electrique, pp. 97-97.

In this paper, a contactless power transfer system is presented. It is designed to supply piezoelectric actuators with a low frequency signal and a DC offset. A power electronic structure based on a full bridge PWM inverter, a resonant capacitor, an inductive rotating transformer which works at low frequencies and the piezoelectric actuator is presented and modeled. The behavior of the system is analyzed

Induction heating is nowadays a key technology due to its advantages in terms of performance and efficiency which has boosted its adoption. Recent developments in domestic induction heating includes flexible cooking surfaces with multiple output power converters. Furthermore, advances in wide bandgap devices allow new design possibilities such as high power density and high efficiency power electronics

The most common controller in wind turbine is the blade pitch angle control in order to get the desired power. Controlling the pitch angle in wind turbines has a direct impact on dynamic performance of the machine and fluctuations in the power systems. The design of a controller that can adapt itself with the system, at any given time, is of crucial importance. To limit the aerodynamic power gained

The increase in active component switching frequency, via GaN technology, allows downscaling the inductor size as soon as the magnetic core-losses are controlled. However frequency induced dissipations in the magnetic material will create thermal heating, consequently complex core shapes allowing a better thermal exchange are needed. Here we propose a specific dimensioning methodology to determine

Semiconductor devices incorporated into power electronics systems are proven to be highly sensitive to their thermal environment. Thus, temperature measurement is a key concern when it comes to reliability of power modules. Some Thermo-Sensitive Electrical Parameters (TSEPs) are used to evaluate online temperature of semiconductor components, in operating conditions of power converters. However, the

In this paper, we present current-voltage characteristics of vertical and pseudo-vertical Diamond Schottky diodes operating up to 473 K. The functionality rate is greater than 75% for each samples. For vertical diodes, current density at 473 K reaches 488 A/cm², while it is greater than 1000 A/cm² for pseudo-vertical diodes. Under reverse bias, the leakage current is less than 10−7 A/cm² at 50 V for

With the advantage of high bandwidth and small insertion impedance, a current surface probe (CSP) used to measure switching current waveforms is presented in this paper. Its transfer impedance is characterized and validated by measuring an IGBT switching current that is compared with those obtained with a current probe (CP), a current shunt (CS) and a Hall effect current probe (HECP). Furthermore,

In this paper it has been investigated if there is a possibility to reduce the switching frequency for a two-level inverter by improving the direct torque control (DTC) algorithm by adding a non-switching condition when a new sector is entered. It is believed that the DTC switching table can be improved by adding a non-switching condition when sector change occurs. This will reduce the number of switching

This paper suggests a DC/DC converter with coreless transformer for electric vehicle chargers. Since the coreless transformer has low coupling coefficient, the converter uses resonance but its power is controlled by PWM. Appropriate design of resonant capacitor improves its switching conditions of ZVS operation of all switching devices and near ZCS of bottom switches and output rectifier. Using Wheeler