Device and method for measuring frequency response and bandwidth of current sensor

Abstract

The invention relates to a device and method for measuring a frequency response and bandwidth of a current sensor. The device comprises a charging unit, an electric energy storage unit, a current waveform generating unit, the current sensor, a voltage sampling unit and a central processing unit which are connected in sequence, wherein the electric energy storage unit is connected with the centralprocessing unit through a voltage detection unit, and the central processing unit is further connected with the charging unit. The method comprises the steps of utilizing square waves, pulse waves, multiple-harmonic waves and the like as measured current signals input into the current sensor, and using output signals of the current sensor to measure frequency response and bandwidth characteristicsof the current sensor. According to the device and method, the difficulty of measuring and evaluating the frequency response and bandwidth characteristics of the current sensor is obviously reduced,the device and method are practical and convenient to use, results are reliable, and the device and method are worthy of popularization.

Description

technical field [0001] The invention relates to a device and method for measuring frequency response bandwidth of a current sensor. Background technique [0002] Current sensors are widely used in power generation, transformation, transmission, distribution, and power consumption lines. The currents of various power consumption occasions are very different, ranging from a few amps to tens of thousands of amps, and there are both DC current measurement requirements. There are also AC current measurement requirements, as well as high-frequency current measurement requirements. Therefore, converting currents of different magnitudes into a relatively uniform voltage in proportion is convenient for measurement, control, and protection. In particular, the isolated current sensor not only reduces the risk of directly measuring high-voltage lines, but also reduces the danger of actual operation and improves the utilization rate of the isolated current sensor. [0003] With the con...

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Problems solved by technology

[0005] 1. A current source with high accuracy, large capacity and continuously adjustable frequency in a wide range is required, otherwise it cannot meet the evaluation of the full-scale frequency response bandwidth of the current sensor;

[0006] 2. In fact, accurate high-frequency high-current power supply will be more difficult and costly in terms of production and implementation;

[0007] 3. Each frequency point is tested point by point, which is time-consuming and labor-intensive, which increases the cost of test evaluation;

[0008] 4. Ignoring the rapid development of digital signal and digital information processing technology; etc.

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