Pulse Width Modulation (PWM) is a fundamental technique in power electronics that facilitates the efficient control of power delivery by modulating the width of voltage or current pulses.

This article proposes and implements an advanced pulse frequency modulation (PFM) scheme to adjust the output power of the parity-time (PT) symmetric wireless power transfer (WPT) system. The key is ...

Four-level inverters offer lower voltage strain and less current fluctuations than two- or three-level inverters, but suffer from more severe DC-link capacitor voltage imbalance issue. The existing ...