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Calibration method of magnetic core loss measurement

A technology of magnetic core loss and calibration equation, which is applied in measurement devices, measurement of electrical variables, dielectric properties measurement, etc. The effect of standard accuracy

Inactive Publication Date: 2017-01-04
FUZHOU UNIV
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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to propose a calibration method for magnetic core loss measurement, aiming at the problems that the current calibration method for magnetic core loss is complicated to operate, and the calibration model is not perfect and inaccurate, which causes large errors in magnetic part loss measurement , combined with the DC power meter method for magnetic component loss measurement, a new calibration model is proposed, which can more completely and accurately reflect the loss of the device under various working conditions, so as to improve the accuracy of the DC power meter method for measuring magnetic component loss

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  • Calibration method of magnetic core loss measurement

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] This embodiment provides a calibration method for magnetic core loss measurement, comprising the following steps:

[0039] Step S1: Measure the inductance L of the calibration magnetic part and the frequency resistance characteristic curve Rac(f);

[0040] Step S2: By adjusting the output voltage of the DC power supply and controlling the driving duty cycle of the inverter, a certain range of different voltages U is applied to the calibration magnet. in , Different working conditions of different frequencies f and different duty ratios D, and record the parameter settings under different working conditions, and measure the input power P of the DC power supply under different working conditions at the same time in ;

[0041] Step S3: Harmonic decomposition is performed on the excitation current waveform of the calibration magnetic parts under di...

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Abstract

The invention relates to a calibration method of magnetic core loss measurement. On the basis of measuring loss of a magnetic piece by use of a direct-current power meter method, through detailed analysis of generation principles of all loss parts of an established square wave inversion apparatus, a precise device loss calibration module is established. By considering the fact that when the temperature rise of a device is different, calibration coefficients of the device loss calibration module will change, and different input voltage will directly cause a switch device of the device to work in different temperature rise, therefore, on the basis of the established calibration module finally, segmented calibration is performed according to different input voltage and measurement precision of the device is greatly improved.

Description

technical field [0001] The invention relates to the field of magnetic core loss calibration, in particular to a calibration method for magnetic core loss measurement. Background technique [0002] Power converters are widely used as high-efficiency power conversion devices. Magnetic components, as the main components, have a great impact on the efficiency, volume, weight, and performance of power converters. With the improvement of the operating frequency and efficiency of power converters and the application of new magnetic materials, the analysis and optimal design of magnetic components are more important, which puts forward higher requirements for the measurement accuracy of the loss of magnetic components. The existing methods for measuring the loss of magnetic parts mainly include AC power meter method, calorimeter method and DC power meter method. [0003] Among them, the process of calorimeter calibration and test operation is complex and time-consuming, and require...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/26
CPCG01R27/2688
Inventor 陈为柳百毅陈庆彬
Owner FUZHOU UNIV