Two Simple Approaches of Hysteresis Loop Measurement Using MATLAB/Simulink

This paper presents two simplified simulation methods for measuring the hysteresis loop of magnetic materials using MATLAB/Simulink simulations. The first approach directly measures the magnetic flux density and magnetic field strength via the flux and MMF (magnetomotive force) sensor block parameters. The second is the indirect approach using a simple RC integrator circuit to measure the capacitor voltage to determine the magnetic flux density and calculate the magnetic field strength. Furthermore, understanding the phenomenon of the hysteresis loop, using simulations to estimate measurement results in practice.

I. Introduction

There is the widespread use of measuring to determine the hysteresis loop of magnetic materials to analyze the core loss of electromechanical (EMCs) machines [1]. Using MATLAB/Simulink software simulation is another way of simply checking the measure values. The advantages are adjusting block parameters easily, iterating quickly, and being suitable for solving mathematical problems [2]. Therefore, MATLAB/Simulink has very high efficiency, low cost, and help solve learning problems during the Covid-19 pandemic, which has to change to online learning. This research will simulate a simple hysteresis loop phenomenon in magnetic materials. The results were compared with two approaches. The first approach, the direct measurement, uses the ideal flux sensor and the MMF sensor block parameter to measure the magnetic flux density, B-values, and the magnetic field strength, H-values. The B-H curve shows the properties of magnetic materials. It calculates the lifespan of magnetic materials in the research and manufacturing process designed by the operating range of magnetic permeability. The magnetic material saturation region effect causes thermal core loss [3], [4]. In practice, measuring tools such as a hall sensor insertion method will be required, which causes inaccurate measurements from magnetic field interference with permeability [3], [4], and hysteresis loop measurements. The second, the indirect measurement approach, is a practical, direct measurement error solution using a simple RC integrator using the resistor and capacitor circuit in series with the secondary terminals with N₂ turns of a coil wound around a magnetic core [5]. An indirect simulation approach measures the voltage drop across the capacitor, determines the B-value [6], and calculates the H-value further. This paper aims to understand the phenomenon of hysteresis loops using measurement simulations tools. Compare the results of two simple simulations of hysteresis loop measurement approaches and analyze the data related to parameters changing. Future work estimates core losses and implements them to design magnetic materials to make various EMCs in practice.