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This paper proposes a large signal model for generic DC/DC converters that copes with both CCM and DCM modes. In the model, both the peak and the valley current of the inductor are also modeled. The mode change is detected dynamically by sensing the zero crossing of the valley current. The peak value needs some specific detection system to avoid mismatches during large transients. Voltage and current...
A line-interactive UPS has a higher efficiency than double conversion topology. It also has lower cost and size. Nevertheless, the transfer time between modes is an important drawback which makes impossible for line-interactive UPS to be implemented in certain applications. During this transfer time, which the UPS needs to detect the grid disturbance and to establish the stored-energy mode of operation,...
There are three types of Static Uninterruptible Power Supplies (UPS): off-line, interactive and double-conversion. The last one protects the load against all types of line disturbances but it is the most expensive and the one with the lowest efficiency. On the other hand, off-line and interactive UPS have higher efficiency and lower cost, but they show an important drawback: a switching time from...
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