Skin effect measuring device and method

Abstract

The invention discloses a skin effect measuring device and method, and the device comprises a to-be-measured conductor which is provided with two end faces which are oppositely arranged in parallel; asignal generation circuit which is used for transmitting an alternating current driving signal which is amplified by a power amplification circuit and then is input into one end surface of the to-be-measured conductor as an excitation signal; a probe hole which is formed in the other end surface of the to-be-detected conductor; a first probe which is inserted into the probe hole; and a second probe, wherein a probe head of the first probe is in contact with the hole bottom of the probe hole, the tail part of the first probe is connected with one end of a first load through a wire, the other end of the first load is connected with a sampling holding circuit, a probe head of the second probe is connected to the same end face of the to-be-detected conductor as the probe hole in an abutting mode, the tail portion of the second probe is connected with one end of a second load through a wire, the other end of the second load is connected with the sampling holding circuit; and signals collected by the sampling hold circuit are transmitted to an upper computer through a serial port communication circuit.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to a skin effect measuring device and a measuring method thereof. Background technique [0002] When direct current is passed into the conductor, it can be considered that the distribution of current is uniform on any cross-section of the conductor, that is, the current on the cross-section is equal everywhere. When alternating current is applied, due to electromagnetic induction, the current will be unevenly distributed in the wire, the current density at the axis is low, and the current density at the surface of the wire is relatively large, showing a skin-like phenomenon. That is, the effective area flowing through the conductor is reduced, and the AC impedance at this time is also greater. When the AC frequency is increased and reaches a certain frequency, this phenomenon is more significant, and this phenomenon is called the skin effect or the skin effect. [0003] Due to the...

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Problems solved by technology

However, the patent with the publication number CN101465081A pointed out that the problem of using this method to verify the skin effect is that the surface of the conductor is continuous, and the current flowing through the central point connected to the terminal is not the "central current". It is the sum of the "center current" and "surface current" under the path

The observed light and dark changes of the bulb are due to the irregularity of the conductor, resulting in differences in the equivalent resistance of different surface current paths.

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