Researchers unveil a capacitor-less solid-state power filter for

A study conducted by Dr. Haitham Kanakry and Dr. Ozili Dos Santos, Jr. unveiled a new capacitorless solid-state power filter (SSPF) for single-phase DC-AC converters. This innovative technology uses a high-frequency planar converter to eliminate the need for LC filters and DC junction capacitors. The H-bridge transformer, operating at 30 kHz, injects voltage harmonics to generate a sinusoidal output voltage.

Search is published In the magazine CES Transactions on Electrical Machines and Systems.

Theoretical analyses, simulations and experiments conducted on a 60 Hz and 120 V system showed an impressive total harmonic distortion of only 1.29%, which meets the IEEE 519 standard. In addition, the research reveals a significant reduction in three critical components, confirming SSPF’s ability to Enhancing both the efficiency and reliability of power electronics systems.

Looking to the future, the power electronics research team aims to expand the concept of capacitanceless structures to a wider range of power converters, enhancing their reliability. Currently, the team is exploring innovative strategies, including harnessing the stray capacitance naturally present in these converters to improve power density, reduce the number of components, and enhance overall efficiency.

The main focus is to lay the foundation for the miniaturization of electric vehicle chargers by incorporating stray capacitance into the operation of various DC-DC converters, effectively reducing or eliminating dependence on external capacitors. To achieve this, the team introduces a new material, calcium copper titanate (CCTO), which is expected to enhance stray capacitance and serve as a valuable component in multiconverter designs.

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