Design and evaluation of high current PCB embedded inductor for high frequency inverters

Abstract

This paper describes the design and evaluation of high current toroidal Printed Circuit Board (PCB) embedded inductor applicable for high frequency DC/AC converters (lower than 10MHz). The equivalent circuit model of the inductor is presented and the filtering effectiveness is verified by testing three different geometries with its own characteristics and function through a GaN converter. Besides, the temperature rise analysis is provided for all the prototypes by using finite element methods, and the obtained results are also verified by experiments. The reason behind asymmetric trend of temperature rise for the toroidal PCB embedded inductor is also discussed through both simulation and experiment, and the capability of using a heat sink to lower the temperature increment for different geometries is explained.

Analytical and experimental determination of the parasitic parameters in high-frequency inductor

“…Taking these conditions into account, after the transformation of equation (7), the equation (8) has been obtained. The solution to the characteristic equation, which is the denominator in the equation (8), is a pair of characteristic roots (9). (8) and (9), relation describing voltage across the parasitic capacitor C p after turning-off the transistor can be obtained.…”

“…Magnetic components, like transformers or inductors, are also indispensable parts of many power electronics converters [7][8][9][10]. Fast switching transients, characterized by tens of nanoseconds for turn-on and -off processes and related high-voltage applications of SiC devices, can contribute to occurring of some undesirable parasitic phenomena.…”

Analytical model of a resonator for PCB-embedded power conversion

“…Embedding power converters into printed circuit board (PCB) substrates can be an efficient way to increase power density, improve modularity and reliability, simplify cooling, and decrease manufacturing costs [1,2]. In particular, various structures with PCB-based magnetic components have been studied such as 2D windings and 3D cores (e.g., racetrack, pot core) [3,4,5], 3D windings and 2D cores (e.g., toroid, meander) [6,7,8], or air-core components [9,10,11].…”

Study of a Topology of Low-Loss Magnetic Component for PCB-Embedding

“…Many research papers have dealt with integrated and planar magnetic components, including coils, transformers and resonant circuits. These publications focused on manufacturing techniques [1,2,3,4], modelling [1,5], optimization [3], and simulation [1,6,7,8].…”

“…Various structures have been studied, planar [2,9], with solenoid-like structures (windings surrounding the magnetic corelike a toroid inductor) [1,4,10], with pot-core-like structures (core surrounding the windingslike with a PQcore) [3] or air-core components [6,7,8].…”