Current detection circuit, current detection method, readable storage medium and power electronic equipment

Abstract

The invention provides a current detection circuit, a current detection method, a readable storage medium and power electronic equipment, wherein the current detection circuit comprises a current transformer assembly and a control module; the current transformer assembly is accessed to strong current signals to be detected and converts the strong current signals into weak current voltage signals to be output; the control module is connected with the output end of the current transformer assembly and is used for performing integral calculation on the weak current voltage signals; the integral calculation results are used as the voltage effective value; according to the size relationship between the voltage effective value and the preset voltage effective value, whether the strong current signals are overcurrent signals or not is determined. By adopting the technical scheme, the detection errors in the current detection process are reduced; the current detection precision under the electric network fluctuation is improved; the potential safety hazards of peak wave sections in the strong current signals on load equipment are reduced; the fuse breaking or electric fire hazard occurringpossibility of the load equipment under the overcurrent signals can be reduced; the reliability of the load equipment is improved.

Description

technical field [0001] The present invention relates to the technical field of current detection, in particular to a current detection circuit, a current detection method, a computer-readable storage medium and a power electronic device. Background technique [0002] For load equipment such as compressors, the current detection circuit not only plays the role of power factor adjustment, but also plays the role of current limiting protection. [0003] In the related technology, the current detection signal is collected through the current transformer, and then half-wave rectification and electrolytic capacitor rectification and filtering are performed by the rectifier diode, and finally the effective value corresponding to the current detection signal is calculated, and the power factor is adjusted and determined according to the effective value of the current Whether current limiting protection is required. [0004] However, due to the voltage loss of the rectifier diode an...

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Problems solved by technology

[0004] However, due to the voltage loss of the rectifier diode and the manufacturing process, there is a large error in the current detection process

Especially when there are fluctuations in the power grid, the electrolytic capacitor in the current detection circuit will absorb the peak current in the power grid, increasing the error of current detection under the fluctuation of the power grid

[0005] In addition, since the current detection circuit uses a half-wave rectifier circuit, in the case of power grid fluctuations, the fluctuating current contained in the missing current half-wave cannot be detected, which further increases the detection error of the current detection circuit

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