A method and system for calculating the parasitic capacitance of a single-layer solenoid

Abstract

The invention discloses a method and system for computing the stray capacitance of a single-layer solenoid and relates to the technical field of computing of circuit parameters. The method comprises the following steps that firstly, the radius, the number of turns, the height and the wire diameter of the solenoid to be detected are obtained; secondly, according to the number of turns and the height, the turn interval of the solenoid to be detected is worked out; thirdly, according to the turn interval, the radius, the number of turns and the wire diameter of the solenoid to be detected, the stray capacitance of the solenoid is worked out. According to the method for computing the stray capacitance of the single-layer solenoid, the stray capacitance of the solenoid to be detected is worked out according to the physical size of the solenoid to be detected, different from some existing methods only suitable for specific occasions, the method is suitable for the single-layer solenoid with any radius, any height, any number of turns and any wire diameter, and the computation precision is higher compared with the existing methods.

Description

technical field [0001] The invention relates to the technical field of circuit parameter calculation, in particular to a calculation method and system for the parasitic capacitance of a single-layer solenoid. Background technique [0002] A single-layer solenoid is a three-dimensional coil containing several turns with a unified axis, and each turn of the coil has the same radius. When an alternating current passes through the wire, the solenoid will exhibit certain resistance and reactance characteristics. Therefore, it is usually used The reactive characteristic of a solenoid means that it is used as an inductive element. [0003] However, the parasitic capacitance of the solenoid itself will reduce its quality factor at high frequencies and seriously affect its self-resonant frequency. When the operating frequency is higher than the first self-resonant frequency of the solenoid, the solenoid will show capacitance sex. Therefore, for a solenoid, it is very important to a...

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Problems solved by technology

[0003] However, the parasitic capacitance of the solenoid itself will reduce its quality factor at high frequencies and seriously affect its self-resonant frequency. When the operating frequency is higher than the first self-resonant frequency of the solenoid, the solenoid will show capacitance sex

Therefore, for a solenoid, it is very important to accurately calculate its own parasitic capacitance for its design, but the calculation method in the prior art is aimed at the single-layer solenoid wound by a single-strand copper wire. The parasitic capacitance has the problem that it is difficult to calculate accurately or the calculation method has a certain scope of application

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