EPE Journal Volume 14-2 
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EPE Journal Volume 14-2 - Editorial
EPE Journal Volume 14-2 - Papers
 

  

 

 EPE Journal Volume 14-2 - Editorial 

EPE-PEMC 2004, Riga, Latvia - 11th International Power Electronics and Motion Control Conference  [Details]
By L. Ribickis

The Editorial of EPE Journal 14-2, EPE-PEMC 2004, Riga, Latvia - 11th International Power Electronics and Motion Control Conference, written by Prof. Leonids Ribickis, General Chairman of EPE-PEMC 2004

 

 EPE Journal Volume 14-2 - Papers 

Analysis and Design of A Single-Stage ZCS Quasi-Resonant AC/DC Converter with Low DC Link Capacitor Voltage  [Details]
By T.-J. Chung; G.-W. Moon; M.-J. Youn

An analysis and design of a single-stage zero-current-switching(ZCS) quasi-resonant ac/dc converter with low dc-link capacitor voltage is presented. It has many advantages such as simple circuit, cost-effective, and high power density for low power applications. The proposed converter can effectively reduce the voltage stress on the dc link capacitor and can achieve the power factor correction(PFC) without a dead band at line zero-crossings, which improves the harmonic distortion in ac line current. Furthermore, it is possible to reduce the power loss of a semiconductor power switch by making use of zero-current switching quasi-resonant operation. Theoretical analysis of the converter is presented and design guidelines for selecting circuit components are given. The experimental results on a 75 W(15 V, 5 A) maximum switching frequency of 300 kHz show that maximum dc-link capacitor voltage and maximum efficiency are 446 V and 78 %, respectively. The power factor is above 0.96 under universal line input.


Evaluation of IGCTs and IGBTs Choppers for DC Electrical Arc Furnaces  [Details]
By S. Alvarez; P. Ladoux; J. M. Blaquiere; C. Bas; J. Nuns; B. Riffault

Indirect conversion structures for DC electrical arc furnaces (EAF) can avoid the use of input filters and Static VAR Compensators (SVC) to reduce problems such as flicker, bad power factor and low rank harmonics. In this article, the authors present laboratory test results over 1.85 MW elementary units of a new supply for DC EAF. The power converter prototypes are built with two different semiconductor technologies, IGCTs and IGBTs. Experimental results have been used to identify the forward and switching characteristics of each semiconductor in real working conditions. Finally, the evaluation of the thermal cycling conditions for each semiconductor technology in the proposed supply for DC EAF is presented.


Motor-Integrated Circular Converter for Hybrid Electric Vehicles  [Details]
By J. Ranneberg; Y. Tadros; U. Schaefer

An electric drive with motor integrated power electronics for the use in hybrid electric vehicles is presented. Novel technologies and specially designed components to fulfil the excessive temperature and restricted space requirements are shown. They allow a low cost full integration of the electric drive in a passenger car power train. The converter has circular shape and is inserted in the stator housing around the end windings of the induction motor (see Fig. 1). The projected peak power of the electric drive is 50 kW. The battery voltage range is 200 400 V. Experimental results of investigations at a first prototype show the potentials of the proposed integration technologies.


High-Power Bi-directional DC/DC Converter Topology for Future Automobiles  [Details]
By J. Walter; R. W. De Doncker

This paper presents a 2 kW three-phase Dual Active Bridge converter (DAB3) which converts power between 42 V and 300 V and which is easily scalable up to 20 kW. The DAB3 has been selected for this application based on detailed simulations comparing different suitable topologies. The circuits investigated in this paper can operate in a soft-switching manner enabling a reduction in device switching losses and therewith an increase in switching frequency. Candidate topologies under a close investigation are the single-phase dual active bridge (DAB1) and the three phase dual active bridge (DAB3). Key-features are the galvanic isolation, reduced cooling costs, and the capability of transferring energy over a wide voltage range. This paper presents the converter breadboard design, the controller design and measurements.