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The objective of this paper is to assess 10 MW direct-drive permanent-magnet (DDPM) generator systems with different control strategies namely pitch control and active speed stall control. In the active speed stall control concept, there is no pitch mechanism, and the rotor speed is actively controlled by the generator to control the output power. The(More)
At a workshop held on the Aeolian Islands in Sicily during May 2004 a group of academic and industry engineers from all over the world discussed the medium- and long-term future of power electronics and its applications in specific areas. The following main issues were identified and discussed: The demand is not for power electronic solutions but for system(More)
Aerospace systems require high power density as well as high availability. An integrated permanent magnet machine and drive has been considered. System integration aids achieving high power density in aerospace applications whereas fault tolerance increases availability, mostly by increasing system phase count. This increase in the number of system phases(More)
An increasing number of distributed generation (DG) units is being connected to the distribution network. This introduces a large number of power electronic converters. Due to the output capacitance of these and other converters there is a risk on harmonics, badly damped transients and so on. In this paper it has been investigated whether the DG unit(More)
First, an electromechanical converter with two mechanical ports and one electrical port (consisting of two concentric machines and two inverters) is considered. This converter works as a continuously variable transmission between the mechanical ports and may, e.g., replace the clutch, gearbox, generator, and starter motor in a motor vehicle. The working(More)
First, an electromechanical converter with two mechanical ports and one electrical port (consisting of two concentric machines and two inverters) is considered. This converter works as a continuously variable transmission between the mechanical ports and may, for example, replace the clutch, gearbox, generator, and starter motor in a motor vehicle. The(More)
The " European Transport Solver " (ETS) [1,2] is the new modular simulator developed within the EFDA Integrated Tokamak Modelling (ITM) Task Force*. Ultimately, it will allow for the entire discharge simulation from the start up until the current termination phase, including controllers and subsystems. The paper presents the current status of the project(More)
A converter concept in the multi-kilowatt class with a high power density being the main goal is presented. High power density is achieved by implementing: ZVS, quasi-ZCS topology and integrated thermal and electromagnetic design. ZVS, quasi-ZCS topology reduces switching losses of IGBT switches and hence improves converter efficiency at high frequencies.(More)
Thermal management plays a pivotal role in achieving high power densities in converters. Improvement on thermal performance of critical components in printed-circuit board (PCB) assembled switch mode converters is achieved by using design techniques that extend across electromagnetic, geometrical, and thermal-integration technologies. For better use of the(More)