Before getting into the design of snubbers it is important to understand the waveforms which occur naturally in power circuits. These provide both the motivation for using snubbers and the information needed for their design. There are many different types of circuits used in power converters, motor drives, lamp ballasts and other devices. Fortunately all of these different circuits have a comm...

During the 1980s, electronic power conversion became commonplace in industrial, commercial, and institutional networks. These new loads, known as power converters, impact all electrical networks, usually in a negative manner. Power converters tend to be disruptive to the utility network and sometimes to other consumers. When power electronic loads are present, attempts to correct power factor i...

OWER CONVERTERS have been widely adopted for distributed power generation systems, where the resonances may be excited. Although many innovative methods have been put forwarded to attenuate the appeared resonances and enhance the stability of system, how to keep high performance of power converters is still a big challenge for researches and engineers, especially when the power grid is weak and...

At high frequency, the winding losses of power transformer due to skin and proximity effects becomes a significant component in the loss calculation of the transformer efficiency. This paper examines the winding losses associated with these effects for planar-type low-profile transformers that are suitable for high frequency high density soft switching power supply application. The transformer ...

In this paper, we analyze the behaviour of a switched mode power supply (SMPS) regarding the radiated magnetic nearfield through an initial understanding of the electrical working of the converter, particularly during switchings. We propose a method based on impedance analysis at each state of the converter in order to predict the resonances of currents and/or voltages in the SMPS at the origin...

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This paper presents results from ongoing investigations into the performance of the Michigan-style classifier system in a complex multi-agent environment. Using a simplified model of a continuous double-auction market place the use of ZCS as an adaptive economic trading agent is examined. It is shown that a number of small changes to the basic system greatly improves its performance, resulting ...

When an incumbent technology network faces a new entrant with superior capabilities, it may choose to announce a technology improvement as a preemption strategy to avoid forfeiting users. While the incumbent faces the dilemma of how much improvement it should commit to, users face the challenge of deciding how to divide resources (e.g., time spent) between the two networks. Using a two-period d...

We investigate the matching algorithm used by the German central clearinghouse for university admissions (ZVS) in medicine and related subjects. This mechanism consists of three admission procedures that are administered sequentially. While these procedures differ with respect to the criteria applied ( final grades from school, waiting time etc.), two of them make use of priority matching. In p...