Measuring device and method for direct current supply output impedance

A technology of output impedance and DC power supply, applied in measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve problems such as large system deviation, and achieve the effect of overcoming system deviation

Active Publication Date: 2015-05-20
BEIJING DONGFANG MEASUREMENT & TEST INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Same as the above problem, the input impedance of the load has also become the object to be measured. The actual measurement data is the result of the parallel connection between the input impedance of the load and the output impedance of the power supply, and there is a large system deviation.

Method used

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  • Measuring device and method for direct current supply output impedance
  • Measuring device and method for direct current supply output impedance
  • Measuring device and method for direct current supply output impedance

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Embodiment Construction

[0042] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0043] like Figure 5 Shown is a schematic diagram of the DC power output impedance measuring device of the present invention. A DC power supply output impedance measurement device, including a test frequency point voltage phasor extraction module, a test frequency point current phasor extraction module, a small current excitation load module, a frequency sweep phasor analysis module and a control computer; the test frequency point voltage phasor The extraction module and the test frequency point current phasor extraction module are respectively connected to the voltage input terminal U and the current input terminal I of the frequency sweep phasor analysis module, and the signal output terminal S of the frequency sweep phasor analysis module is connected to the small current excitation load module, and the frequency sweep The phasor analysis ...

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Abstract

The invention discloses a measuring device and method for direct current supply output impedance. The measured direct current supply output impedance is defined at a specific operating point and a specific test cross section, the presented equivalent impedance is seen in the direction of the test cross section facing a power supply, and system deviation in the measuring process, caused by load input impedance, is avoided. The measuring device comprises a test frequency point voltage phasor extraction module, a test frequency point current phasor extraction module, a low-current excitation load module, a sweep frequency phasor analysis module and a control computer, wherein the test frequency point voltage phasor extraction module and the test frequency point current phasor extraction module are respectively connected with a voltage input end and a current input end of the sweep frequency phasor analysis module; the signal output end of the sweep frequency phasor analysis module is connected with the low-current excitation load module; and the sweep frequency phasor analysis module is further connected with the control computer.

Description

technical field [0001] The invention relates to the technical field of impedance measurement of a DC power supply system, in particular to a device for measuring the output impedance of a DC power supply and a measurement method thereof. Background technique [0002] The DC power supply system is a system composed of a power supply and many loads. The impedance of the power supply system can be divided into two parts: the output impedance of the power supply and the input impedance of the load. The output impedance of the power supply is an important technical index reflecting the power supply quality, compatibility, and stability of the power supply system. The input impedance of the load is an important technical index reflecting the input filter or power converter DC-DC suppression of conducted interference and suppression of reflected power. The two are collectively referred to as the power system impedance. [0003] Power system design and electrical load design are of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/08
Inventor 梅高峰刘民孙毅金光远郝慧萍
Owner BEIJING DONGFANG MEASUREMENT & TEST INST
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