Schweitzer Engineering Laboratories, Inc. (SEL) has announced wide-area-measurement-based control in a transformer relay for the first time. This enhancement to the SEL-487E Transformer Protection ...

All regulated power supplies require a feedback link from the output to control the power stage. When isolation is necessary, designers traditionally use an ...

The low-power (milliwatt) flyback transformer used in a switched-mode power supply (SMPS) needs to be designed with a gap in the magnetic path for maximum power delivery over temperature. Transformers ...

Several switching-converter topologies exist for power converters that operate from the ac mains and must maintain a power factor of 0.9 or better. One topology is a boost converter with a control ...

Find a downloadable version of this story in pdf format at the end of the story. Efficiency and density (Watts/Volume) have long been the metrics used to compare the performance of isolated DC-DC ...