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A hybrid magnetic approach, consisting of merging two different magnetic core properites such as ferrite and iron powder cores together, is an effective solution for power converter applications. It can provide similar magnetic properties to that of magnetic powder cores but showing less copper loss than powder cores. Additionally, the relatively large inductance at low loading current is an excellent...
This paper presents a design and construction of an integrated magnetic element IME to achieve high efficiency and high power density in 1250 W LLC resonant converter. Superposition of two magnetic inductions oriented antiparallelly in the chosen areas of IME allows reduction of the volume required for inductive elements, increased coefficient of transferred power to volume [W/dm3] and reduction of...
Interior permanent magnet synchronous motors (IPMSMs) are currently widely utilized as traction motors. The permanent magnets used in IPMSMs are an important factor; thus, high-coercivity permanent magnets with lesser rare-earth elements are in development. This paper proposes two modified versions of double-layered IPMSMs containing a strong magnet to improve their efficiency and reduce their size...
The paper describes a compact high-voltage pulse generator for supplying the non-thermal plasma reactors for sterilizing powdered spices. Built and investigated converter generates a high voltage pulses of 35kV in amplitude and 70kW in a peak. The first part of the article presents an analytical description of Tesla transformer. Next part describes topology based on Tesla transformer with a toroidal...
Three-phase inductors are crucial components for power electronic devices. The most typical measurement process of such inductors bases on three-phase power supply, but it causes many difficulties, especially in industrial or manufacturing tests. The proposed alternative is an implementation of single-phase measurements to three-phase inductors. This approach is discussed in the publication.
The paper investigates a thermal behaviour of a DC inductor deployed in a 600 kW power converter for particle accelerators. The inductor is manufactured from electrical steel core and two magnetically coupled windings with integrated air ducts for enhanced air circulation. The thermal analysis of inductor are carried out by means of a Computational Fluid Dynamics (CFD) model and simulations. The paper...
Almost all power electronic converters require magnetic devices and some properties of the converters can be controlled with magnetics. New magnetic materials enable implementation of magnetic control of converters also in high switching frequency applications. The presented paper gives an overview about controllability of magnetic devices in theory and practice, simulation approaches and examples...
The subject of this paper is to propose a design method of the EMI filters that allows to minimize the volume of the common-mode inductor with consideration of core saturation issues. Inductor volume depends not only on its inductance value, but also on the relationship between the filter and its environment which can saturate the magnetic material due to many parameters, especially when the filter...
DC is regarded as an attractive alternative to conventional AC technology in collection networks for large-scale wind and PV generation systems. Playing the role in the stepping up voltage and exporting the power from the individual generation units, DC/DC converters are one of the most crucial parts of the DC collector. Isolated medium-power DC/DC converters would require a medium voltage medium...
This paper presents designing procedure of a high efficiency 5 kW silicon-carbide (SiC) based three-phase power factor correction (PFC). SiC switches present low capacitive switching loss compared to the alternative Si switches. Therefore, the switching frequency can be increased and hence the size of the line filter (generally reactive components) will be reduced. However, to achieve high efficiency...
This paper presents a magnetically integrated isolated bidirectional three-port DC-DC converter (TPC) that includes an integrated dual active bridge converter (DAB) and non-isolated bidirectional DC-DC converter (NBC), each of which can be independently controlled. The proposed TPC simultaneously uses large, small, and magnetizing inductances, of which the small and magnetizing inductances are used...
Interleaved switching of parallel inverters has previously been proposed for efficiency/size improvements of grid connected three-phase inverters. This paper proposes a novel interleaving method which practically eliminates insulated gate bipolar transistor (IGBT) turn-on losses and drastically reduces diode reverse recovery losses. The reduction in switching losses are obtained by interleaving two...
In this paper the line reactor design for parallel connection of high power inverters with interleaved carriers is presented. Based on state of the art interleaving reactors configurations and based on high power requirements, design iterations are performed to detect the implementation issues. The parasitic effects are highlighted in finite element models and a new reluctance model is introduced...
Magnetic components using soft core materials are widely used in power electronic converters. The hysteresis effect of the material leads to power loss and harmonic distortion. If this effect can be modeled in system-level time-domain simulation, the performance of the magnetic component in combination with power converters can be predicted more accurately during the design phase. This work proposes...
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