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In this paper, a novel LLC resonant converter with parallel input and parallel output circuit topology is proposed to achieve the good performance of reduced switch count and medium power compared with conventional parallel half-bridge resonant converter. The proposed LLC resonant converter has two resonant circuits, two resonant circuits use the same power switches to transmit power so that the switch...
This paper deals with the transformation from differential to common mode noise due to slightly unbalanced filter capacitors in a three-phase motor drive system. Indeed, filter components, i.e., inductors and capacitors, can be slightly different due to the tolerance of commercial products usually varying from 5% to 20%. Such components discrepancies result in noise transformation from differential...
This paper proposes a methodology of design and control, and shows the main simulation and experimental results for a LLCC Series-parallel resonant converter applied to Wireless Power Transmission (WPT) in-motion. Using Induced Power Transfer (IPT) and considering a near-field energy-transfer method (less than 20 cm), the converter is applied in a small scale electric vehicle (EV). The modeling was...
This paper proposes full-wave voltage doubling type series-synchronized switch harvesting on inductor (S-SSHI) circuit for piezoelectric energy harvesting. A conventional circuit is composed of a full-bridge rectifier circuit and SSHI circuit to increase the output power. In the proposed circuit, a full-wave voltage doubling rectifier is chosen and the SSHI circuit is included in the rectifier circuit...
This paper proposes a new soft-switched High Step-up DC-DC converter for energy storage systems in DC traction vehicles. In this converter, soft-switching operation, i.e., zero current switching has been obtained by employing dual resonant auxiliary circuits to the conventional step-up DC-DC converter. The auxiliary resonant consists of additional auxiliary switches; inductor and capacitor are used...
The method of calculating a compensating device for a dual-frequency power supply of a crucible furnace equipped with a dual-section inductor with counter winding is given in the article. A special frequency converter provides power to sections from two current sources of different frequency and equal amplitude. Electromagnetic, hydrodynamic and thermal processes in an induction crucible furnace with...
This paper presents the design for a dc circuit breaker based on the coupled-inductor for use in dc grid protection. The breaker acts autonomously as a result of the fault current path. The exact step change in current required to open the breaker can be adjusted in the design by selecting an appropriate turns ratio for the coupled-inductor. A simulation is run for a zonal dc grid to demonstrate the...
This paper presents a three-phase isolated soft-switching dc-dc converter suitable for high-power applications. Three-phase star-connected high-frequency transformers provide isolation between input and output. Primary-side of the converter consists of three-phase inverting bridge with reverse-blocking switches. Secondary-side consists of three-phase diode bridge followed by dc output capacitors,...
The paper proposes a low ripple high voltage converter applied in plasma field. The structure of the circuit combines conventional symmetric voltage multiplier and a parallel resonant circuit. High-output-voltage low-output-voltage-ripple converter can be achieved by the way of superposition and cancellation of capacitors' alternating signal from the parallel resonant circuit. The problem of high...
The combination of a real experiment with a virtual one in the electrical engineering education increases the students' interest for the subject and makes the material easier to comprehend. In the following paper, there are examples about demonstrating such complementation and about checking and visualisation an analysis of simple electrical circuits.
The paper presents modeling of parallel-loaded resonant converter in the development system MATLAB®. A mathematical model is composed using the laws of electrical engineering — specifically the circuit laws of Kirchhoff. The model is evaluated with design parameters suited to represent continuous current operating regime. A comparison for the model's verification is done in other simulation software...
Buck-IPT system is composed of a front power regulation buck circuit and a behind inductive power transfer circuit (IPT), which is higher-order, multi-operating-mode, compound nonlinear system. Aiming at dynamic problems such as large inductor current and slow response in the start-up progress, this paper proposes a dynamic characteristic optimization control method. Firstly, this paper proposes a...
It is demonstrated by means of RLC circuit models of electrically small antennas that their isolated-resonance quality factors obtained from the “Q-energy” predicts their bandwidths with greater accuracy than the “equivalent-circuit” or the “elec-trodynamic” energies. Moreover, it is verified that the Q-energy cannot be considered stored energy in highly dispersive lossy material. Nonetheless, using...
This paper proposes the Cockcroft-Walton circuit with SiC diodes and an input inductor. The proposed circuit is focused on LC resonance between the junction capacitors and the input inductor. It is experimentally clarified that the LC resonance causes the output voltage to increase.
Port Hamiltonian systems are usually passive with respect to port variables that are power conjugate (eg: voltage and current, force and velocity) and this lead to energy shaping control methods. But systems with ‘dissipation obstacle’ cannot be controlled using these port variables and therefore we need to search for alternative passive maps. One option is within the Brayton Moser framework, where...
In this paper, an architecture of a single-stage power factor corrected AC-DC converter controlled by a high voltage resonant controller IC L6598 is proposed as LED street lighting driver. The converter is formed by the integration of two boundary conduction mode (BCM) boost circuits and a half-bridge LLC resonant circuit. The converter adapts dual half-wave rectifiers at the output side that supply...
This paper provides new thyristor controlled reactor (TCR) used for static VAR compensator (SVC). The concept of this modified thyristor controlled reactor MTCR depends on modifying the waveform of the developed current by adding auxiliary circuit. The auxiliary circuit consists of back-to-back thyristors, inductor and capacitor. The developed current be the MTCR has less harmonic content. This paper...
An improved single-phase zero-voltage transition soft- switching inverter with a subtractive coupled inductor auxiliary circuit is proposed to provides the zero- voltage switching under an unipolar PWM scheme. The proposed inverter overcomes the several drawbacks of the conventional soft-switching inverter including a bulky capacitor, protection circuit requirement, and/or dc-link voltage fluctuation...
In this paper, a generalized fractional-order form of the simulated inductor using a single current feedback operational amplifier (CFOA) and a fractional-order capacitor is introduced. Analytical expression of the equivalent fractional-order inductor versus the circuit elements is achieved. Moreover, the effect of the parasitic impedance and the non-idealities of the CFOA are investigated analytically...
Driver circuits for inductively coupled systems such as wireless charging and RFID are more efficient if a high Q factor can be achieved but this requires tuning to compensate for component tolerances and environmental influences. Any tuning system used must be able to handle potentially large voltages at resonance as well as achieving precise tuning. In this paper, we describe the use of a low loss...
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