Feasibility Study GaN Transistors Application in the Novel Split-Coils Inductive Power Transfer System with T-Type Inverter

Abstract

A promising solution for inductive power transfer and wireless charging is presented on the basis of a single-phase three-level T-type Neutral Point Clamped GaN-based inverter with two coupled transmitting coils. The article focuses on the feasibility study of GaN transistor application in the wireless power transfer system based on the T-type inverter on the primary side. An analysis of power losses in the main components of the system is performed: semiconductors and magnetic elements. System modeling was performed using Power Electronics Simulation Software (PSIM). It is shown that the main losses of the system are static losses in the filter inductor and rectifier diodes on the secondary side, while GaN transistors can be successfully used for the wireless power transfer system. The main features of the Printed Circuit Board (PCB) design of GaN transistors are considered in advance.

Coil Design of a Wireless Power-Transfer Receiver Integrated into a Left Ventricular Assist Device

“…At higher frequencies, such as 6.78 MHz, switching losses become dominant, significantly reducing the efficiency of the system and increasing power losses on the transistor. To this aim, gallium nitride (GaN) transistors were considered (model EPC2023) [31][32][33][34]. To drive the four GaN MOSFETs of the bridge, two independent square signals were used.…”