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A method and device for measuring AC resistance based on quasi-harmonic model sampling algorithm

A technology of AC resistance and measurement method, which is applied in the directions of measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., and can solve problems affecting parameter estimation accuracy and low spectrum utilization

Active Publication Date: 2021-12-24
BEIJING DONGFANG MEASUREMENT & TEST INST
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  • Abstract
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Problems solved by technology

However, on the one hand, this method uses the real signal DFT algorithm, and the spectrum utilization rate is low; on the other hand, when the harmonic components of the voltage signal are more obvious, it will affect the parameter estimation accuracy

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  • A method and device for measuring AC resistance based on quasi-harmonic model sampling algorithm
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  • A method and device for measuring AC resistance based on quasi-harmonic model sampling algorithm

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Embodiment Construction

[0091] The present application will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0092] In the description of the embodiments of the present application, it should be noted that unless otherwise stated and limited, the term "connection" should be understood in a broad sense, for example, it can be an electrical connection, it can also be the internal communication of two components, and it can be a direct connection , can also be indirectly connected through an intermediary, and those of ordinary skill in the art can understand the specific meanings of the above terms according to specific situations.

[0093] It should be noted that the term "first\second\third" involved in the embodiment of this application is only to distinguish similar o...

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Abstract

The embodiment of the present application discloses an AC resistance measurement method based on a quasi-harmonic model sampling algorithm, including: adjusting the output voltage of the second signal source so that the bias current approaches zero; acquiring the digital voltage signal; convert the digital voltage signal into an in-phase-quadrature signal based on the Hilbert transform; establish a quasi-harmonic model according to the in-phase-quadrature signal; determine the in-phase-quadrature according to the quasi-harmonic model The frequency and complex amplitude of the signal; the output voltage of the second signal source is determined according to the frequency and complex amplitude of the in-phase-quadrature signal; according to the output voltage of the second signal source, the output of the first signal source The voltage and the reference impedance determine the resistance value and time constant of the impedance to be measured. The embodiment of the present application also discloses an AC resistance measuring device based on a quasi-harmonic model sampling algorithm.

Description

technical field [0001] The invention relates to an AC resistance measurement technology, in particular to an AC resistance measurement method and device based on a quasi-harmonic model sampling algorithm. Background technique [0002] In practical applications in the fields of electricity and electronics, resistors mostly work in the AC state. Due to the influence of parameters such as residual inductance and distributed capacitance, the real part of the resistor's AC impedance, that is, the AC resistance is not equal to its DC resistance, and the imaginary part of the AC impedance Related to the time constant of the AC resistance, which affects the phase change of the signal. For precision measurement, it is not enough to calibrate the resistance used in the AC state only in the DC state, and it is necessary to accurately measure the AC parameters such as its AC resistance value and time constant. At present, the precision measurement method of AC resistance and its time c...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/02G01R27/08
CPCG01R27/02G01R27/08
Inventor 李亚琭刘碧野胡志远
Owner BEIJING DONGFANG MEASUREMENT & TEST INST