METHOD OF MEASURING WEBER-AMPERE CHARACTERISTICS OF ELECTROTECHNICAL ARTICLE AND DEVICE THEREFOR Russian patent published in 2016 - IPC G01R33/12 

FIELD: measuring equipment.

SUBSTANCE: invention relates to magnetic measurements and is meant for measuring weber-ampere characteristics of electrotechnical item. Technical result is achieved by a method measuring the weber-voltage characteristics of electrical products, lies in that winding of electrical product connected to a source of sinusoidal voltage, measure voltage across winding and current in it, and calculate coordinates of weber-voltage characteristics, as measured by odd harmonic current and computed weber-voltage characteristic according to formula in form of a power polynomial of odd degree: where I _(2m+1) - amplitude of (2m+1)th current harmonics, ω - angular frequency, ψ - value of magnetic flux through electrical product, k_(2m+1) - CVC coefficients approximating expressions. Device for implementing method of measuring weber-ampere characteristics of electrotechnical item comprises a power amplifier whose input is connected to output-to-analogue converter. Power amplifier output is connected to electrotechnical item winding connected in series and shunt current. Output voltage of power amplifier to input of first measuring amplifier, and a shunt current output to second input of measuring amplifier. Output of first measuring amplifier is connected to first input of switch. Output of switch is connected to input of analogue-to-digital converter whose output is connected to input of a personal computer. Personal computer output is connected to input of digital-to-analogue converter. Further, there is a multichannel selective harmonic filter current, connected by input to output of second measuring amplifier, and output to second input of switch.

EFFECT: technical result of claimed method is high measurement accuracy by taking into account temperature error.

2 cl, 1 dwg