Analysis of buck-boost converter inductor loss using a simple online B-H curve tracer

Abstract

A simple method to plot online B-H curve and calculate core loss of the inductor in a conventional buck-boost converter is developed. In order to obtain a reliable loss data, measurement error and phase shift error are analyzed and then quantified. A new method to minimize measurement error is given. A new core loss model in terms of switching duty cycle is presented. This model predicts variation of core loss of an inductor operating .in various conditions in a switching converter. This inductor model can be generalized to inductors in other switching converter topologies.

Enhancing voltage gain and switching efficiency in a non-isolated buckboost converter through integrated switching inductor configuration

“…Every part of the design came from the electronics toolbox in Sims Cape, and the ode23t solver configuration was utilized. The suggested SIBB converter was compared to a standard buck-boost converter model presented in Chung et al (2000). The two models were compared by measuring their minimum and maximum duty cycles in boosting and bucking mode, as well as their voltage gains and the stress placed on their switches.…”

“…Voltage stress is a key factor to consider because of the switch's significance. Rather than using an input inductor, researchers have developed switching inductor models to increase the conversion ratio by increasing the duty cycle (Chung et al, 2000;Musale and Deshmukh, 2016;Alateeq et al, 2017;Axelrod et al, 2008;Almalaq et al, 2018).…”

A Novel Bidirectional DC–DC Converter with Low Stress and Low Magnitude Ripples for Stand-Alone Photovoltaic Power Systems

“…The magnetic losses in DC-DC converters occur due to inductive elements. When the voltage across the inductor is in the form of a square wave, the magnetic loss can be determined using Equation ( 24) [32].…”

Errors in Electrical Core Loss Measurement for Extremely Small Samples Applicable to Integrated Converters

“…Any displacement of the measured voltage and current waveform in time can result in large errors in power loss measurement. Two basic types of error are magnitude error and phase error in the measured waveforms [7]. These errors can be come from various sources in the measurement circuit.…”

“…In electrical characterization of core loss, impedance measurement method [2][3][4], the CEEC 25300 or CEEC 25000 method [5], or other electrical methods [6] can be applied. In [7], an electrical method is used to characterize core loss of an inductor in a conventional buck-boost converter. An analysis of amplitude and phase shift errors in measurement is made and presented mathematically.…”