Comprehensive comparison and selection of magnetic materials for powertrain DC–DC converters

Abstract

In power powertrain, DC-DC converters, the selection of suitable magnetic core materials is a critical design consideration. It ensures weight and volume reduction and performance enhancement of such types of converters. This study provides a comprehensive comparison of magnetic core materials and a simplified cobweb chart that aids in the initial selection of magnetic core materials for powertrain DC-DC converters. The weighted property method (WPM) is used to systematically select and rank the suitability of the magnetic core materials, and a multi-attribute decision-making analytical hierarchy processes is used to calculate the relative weight of different properties. Based on the peculiar requirements of powertrain DC-DC converters, the most suitable magnetic core materials are identified and ranked with the help of the cobweb chart and the WPM. This study aims at providing a quick reference for designers to ease the selection of suitable magnetic core material for powertrain DC-DC converters.

Performance enhancement of powertrain DC–DC converter using variable inductor

“…In this case, Q v ðsÞ will be the product of ( 14) and the inverse of (9) excluding the NMPZ. When the NMPZ is eliminated, the relative degree of ( 9) is 1, hence F Q ðsÞ can be selected in the same way as (14) with values of α different from (14), and Q v ðsÞ will be as shown in (16):…”

“…The detailed characterisation reveals the need for a suitable strategy that determines the suitable levels of auxiliary winding current to exploit the prominent merits of the current-controlled device. Consideration of its design in a real driving cycle is addressed in [15], and the selection of suitable magnetic core materials based on the weighted property method is dealt with in [16]. Furthermore, a simple strategy based on a heuristic approach that relates the currents between the two windings of the magnetic device is presented in [8].…”

Nacre‐Inspired, Efficient, and Multifunctional Soft Magnetic Composites by Cold Sintering Design

“…[ 6 ] Take power converters as an example; the former gives rise to less coil turns, while the latter allows for the use of a smaller magnetic core to handle higher power. [ 7 ] To achieve these goals, higher bulk density with less magnetic dilution is desirable for SMCs. Low coercivity is essential for obtaining a low hysteresis loss of the SMCs and consequently high efficiency of the devices; therefore, the phase components, microstructure, (like particle dimension, shape, porosity, and defects), and internal stresses of the SMCs should be taken into account.…”