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

A current detection circuit and current technology, applied in the direction of RMS measurement, etc., can solve the problems of the production process of rectifier diode voltage loss, increase the detection error of the current detection circuit, and cannot detect the fluctuating current, so as to reduce the risk of fusing or electrical fire. possibility, improve response speed, and reduce the effect of security risks

Active Publication Date: 2018-04-20
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 curren

Method used

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

Examples

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Example Embodiment

[0054] Example 1.1 :

[0055] figure 1 A schematic diagram of a current detection circuit according to an embodiment of the present invention is shown.

[0056] Such as figure 1 As shown, the current detection circuit according to the embodiment of the present invention includes: a current mutual inductance component, which is connected to a strong current signal to be detected, and converts the strong current signal into a weak voltage signal for output; the control module 102 is connected to The output terminal of the current mutual inductance component is used for the integral calculation of the weak current voltage signal, the result of the integral calculation is recorded as the voltage effective value, and the strong current signal is determined according to the magnitude relationship between the voltage effective value and the preset voltage effective value Whether it is an overcurrent signal.

[0057] In this technical scheme, the strong current signal is converted into a w...

Example Embodiment

[0083] Example 1.2 :

[0084] figure 2 A schematic block diagram of the current detection circuit 200 according to an embodiment of the present invention is shown.

[0085] Such as figure 2 As shown, a schematic block diagram of a current detection circuit 200 according to an embodiment of the present invention includes: a current transformer 202, the input winding coil of which is connected to a bus line of a strong current signal, for converting the strong current signal into a weak current signal Signal, and then convert the weak current signal into a voltage signal; voltage amplifier 204, the input terminal is connected to the output terminal of the current transformer 202, used to receive the voltage signal output by the current transformer 202, and scale the voltage signal; The boost circuit 206, the input terminal is connected to the output terminal of the voltage amplifier 204, and is used to boost the scaled voltage signal; the voltage follower circuit 208, the input te...

Example Embodiment

[0096] Example 1.3 :

[0097] Figure 7 A schematic flowchart of a current detection method according to an embodiment of the present invention is shown.

[0098] Such as Figure 7 As shown, the current detection method according to an embodiment of the present invention includes: step S702, in a preset time period, accessing a strong current signal to be detected, converting the strong current signal into a weak current voltage signal and outputting; Step S704: Perform integral calculation on the weak current voltage signal, and record the result of the integral calculation as the effective voltage value; Step S706: Determine whether the strong current signal is overcurrent based on the relationship between the effective voltage value and the preset effective voltage value signal.

[0099] In this technical solution, the hardware requirements of the current detection circuit are reduced by converting the strong current signal into a weak current signal. By integrating the weak cur...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): G01R19/02
CPCG01R19/02
Inventor 刘启国
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD
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