Tracking Deadtime Algorithm for GaN DC/DC Converter

Abstract

The presented method automatically adjusts the deadtime of gallium nitride (GaN) transistors in half-bridge to increase the efficiency. This removes the need of manual measuring and setting the deadtime of the finished converter. The developed algorithm was tested and compared with the fixed deadtime case. The obtained results show that the developed algorithm is achieving higher and more stable efficiency compared to selected fixed deadtime.

Design and Implementation of Two Hybrid High Frequency DPWMs Using Delay Blocks on FPGAs

“…Un ejemplo de ello es el que se presenta en [39], donde se plantea un algoritmo de optimización del rendimiento del convertidor reductor síncrono ajustando el tiempo muerto de las señales de control, conmutado a 200 kHz. Otro ejemplo de interés en la optimización del tiempo muerto es el que se muestra en [40], donde se diseña un algoritmo iterativo para buscar la combinación de tiempo muerto y ciclo de trabajo que maximice el rendimiento empleando transistores de GaN. Con este algoritmo de optimización, los autores varían la potencia que entrega el convertidor y el algoritmo ajusta el tiempo muerto para cada valor de ciclo de trabajo logrando operar con el rendimiento máximo alcanzable.…”

Reverse Conduction Loss Minimization in GaN‑Based PMSM Drive

“…The dead-time is at its optimum when the duration of the negative peaks is minimized. The output voltage 𝑉 of the converter can be expressed as [17]…”

“…In this paper, an online method of dead-time loss minimization for a vector-controlled permanent magnet synchronous motor (PMSM) supplied by a three-phase voltage-source inverter (VSI) controlled by a space-vector modulation (SVM) is proposed. The method is intended to improve and extend the authors' work presented in [17], where a similar approach was discussed for a half-bridge DC/DC converter topology. The method's principle is based on an online analysis of the current controllers' output at multiple operating points.…”