Tomasz Charubin

• MSc. Eng.
• Assistant at Warsaw University of Technology

This paper presents a quantitative model for magnetic field sensors based on the Matteucci effect in non-uniform magnetic fields. The Matteucci effect, observed in twisted amorphous wires, generates voltage pulses due to magnetization changes. The model describes non-uniformities by analyzing the effect of spatial gradients in the magnetic field an...

Robotic disassembly of hard disk drives during their recycling process is a promising technology with significant ecological importance and high economic profitability. However, the efficiency of the robotic disassembly of screws in the cost-efficient process using the robotic system in the selective compliance assembly robot arm configuration is h...

Measurements of mechanical stress dependence of magnetic properties of electrical steels are significant from both theoretical and application points of view. The paper presents a novel measuring setup for testing the magnetoelastic properties of electrical transformer sheets made of grain-oriented and non-grain-oriented steel. The proposed method...

Power conversion devices, such as switching mode power supplies, require the use of a wide range of inductive components. Despite the intense development of advanced magnetic materials for the cores of such elements, SPICE models of these components are still inaccurate and oversimplified. In this paper, a SPICE model of inductive components is use...

In this paper, the design and investigation of an innovative force sensor, based on the Villari effect, is presented. The sensor was built from electrical steel, in a pressductor pattern, but working in bending load mode. The results of the experimental research allowed for the evaluation of transducer’s performance, mitigation of measurement hyste...

Modelling the transient simulation of magnetic circuits is the crucial process for development of modern switching mode power converters. Such models are especially important for newly developed magnetic materials, such as amorphous alloys. Paper presents the gyrator-capacitor model of inductive element with core made of high permeability, Co-based...

In this paper a measurement stand for measuring magnetic moment was presented. The technical drawings of the parts made to order and the calibration procedure of the stand has been described, while also obtaining the results of measurements performed to eliminate the errors caused by the inaccuracy of respective parts of the stand. To obtain quanti...

The article is about the design and implementation of a laboratory stand for fluxgate liquid level measurement in a tank. It concentrates on the development of the concept and construction of complete measuring device. The new-created mechanical system was analysed to determine the parameters best describing the physical phenomenon occurring, to un...

Fluxgate sensors are known for being cheap, robust and sensitive magnetic field sensors. Presented sensor uses Matteucci effect (ME) in its principle of magnetic field sensing, while using harmonic voltage signal extraction typical for fluxgate sensors. In order to increase the sensitivity of used sensor, investigation of high order harmonic of sig...

The Matteucci effect (ME) is one of the lesser-known magnetomechanical effects and is most prominent in bistable amorphous wires. It has some experimental applications—Matteucci effect-based magnetic field sensors are very easy to produce and have inherently linear, hybrid analog/digital output signal. The effect is still poorly understood, however...

This paper presents a mobile ferrograph system for measurement of magnetic parameters of ultrahigh permeability alloys. The structure of developed system is described, as well as exemplary measurement results of Co67Fe3Cr3B12Si15 alloy used in space applications are presented. © 2018, Industrial Research Institute for Automation and Measurements. A...

This paper presents investigation results regarding the Jiles-Atherton-based hysteresis loop modeling of ultra-high permeability amorphous alloy MELTA® MM-5Co. The measurement stand is capable of accurately measuring minor and major hysteresis loops for such a material together with exemplary measurement results. The main source of the measurement...

DC magnetic field sensor similar to fluxgates utilizing Matteucci Effect was proposed previously. As these types of sensors depend on measuring the second harmonic of the signal, a spectral analysis of Matteucci effect signal was measured. Results indicate that each harmonic is periodical with the increase of DC magnetic field and the period decrea...

The paper presents automatic and modular measurement station for the magnetic materials testing. It allows for measurements of magnetic hysteresis loops under various regimes (sine, triangle or arbitrary magnetizing field, sine or triangle magnetic flux density) and relative permeability curves. The modular nature of the system allows for measureme...

The main objective of this project was the development of fully functional microprocessor controlled thermoelectric ammeter for laboratory and didactic purposes. Device is based on analog thermoammeter transducer, Kamduino platform and thermocouple transducer with cold junction temperature compensation. The main advantage of this unit is direct mea...

Paper presents an automated measuring station for testing of ferromagnetic materials. The system allows for conducting a series of preconfigured measurements in various settings by producing a graphical output of hysteresis loops. Presented system utilises a high resolution U/I converter and a fluxmeter controlled by a PC class computer with Nation...

The design and construction of a measurement system for magnetic field sensors testing with a maximum induction range of 10 mT was described. In order to verify the uniformity of the magnetic field, the distribution of the field in the measurement area was measured. Main goals of the construction were: the ability to compensate for the Earth’s magn...

In this paper possibility of application two dimensional vector Preisach model for bulk materials was investigated. Physical magnetization mechanisms in bulk cores and thin ribbons were analyzed. Model is based on collection of Preisach planes which describe material state in different angles on rotation plane. Presented model exhibits good conform...

In this paper the innovative method of micro-force measurement based on air gap influence on magnetic circuits properties is presented. Magnetic ribbon core with air gap is put under transverse compressive stress perpendicular to the magnetic field direction generated by low-mass calibration weight. Change of the air gap induced by the force acting...

In this paper test stand consisting of Joule annealing station, and magnetic field measurement stand for Matteucci effect investigation is described. The system allows for annealing of amorphous wire samples while applying torsion (twisting of the wire), and measuring the ME voltage response to alternating magnetic field applied to sample in chosen...

The aim of this paper is to present an automated measuring station for ferromagnetic materials testing. The system is able to obtain full characteristics for magnetoelastic crystal magnetics, ceramic magnetics and amorphous magnetics. The paper presents the setup for measuring station and the process of obtaining measurement data for sample materia...

This paper presents the results of measuring the impact of disturbances on the properties of a 31 bit resolution analog-to-digital converter. The researches were held for the following AD converter operating conditions: with battery supply or with switching power supply, for different ambient temperatures, with the galvanic isolation of the signal...