Automated system for the measurement of AC magnetization characteristics

Abstract

The paper presents a fully-automated system for the magnetic scalar hysteresis measurement of the ring core specimens. The system is based on the National Instruments PXI-4461 two-channel dynamic signal generation and two-channel acquisition cards. A power amplifier is designed and manufactured, based on the TDA2030 monolithic integrated circuit, and a computer code for controlling the measurement process is programmed in LabVIEW. The system applies the analog RC integration. The system allows graphical presentation of the measured hysteresis curves, and calculation and presentation of the first magnetization curve, approximated by locus points of the symmetric hysteresis cycles. The first magnetization curve can be exported in a format prepared for the importing in the finite element analysis (FEA) software.