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Current integration -type power detection device and power checking module

A technology of power detection and current integration, which is applied in the direction of electrical devices, measuring devices, and measuring electric power, can solve the problems of poor accuracy, high cost, and poor accuracy of AC load power detection methods, and achieve the realization of Detection of AC power, low cost, and accurate detection effect

Inactive Publication Date: 2008-11-19
HANGZHOU ZHENGU TECH
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a current integrating type power detection device to solve the problems of poor accuracy and high cost in the detection method of AC load power in the prior art
[0007] Another object of the present invention is to provide a power detection module to solve the problems of poor accuracy and high cost in the detection method of AC load power in the prior art

Method used

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  • Current integration -type power detection device and power checking module
  • Current integration -type power detection device and power checking module
  • Current integration -type power detection device and power checking module

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Embodiment Construction

[0025] The principle of the invention is: use the integral effect of the capacitance on the current to compare the set current value and the average value of the half-wave of the alternating current, and achieve the purpose of detecting the alternating current power.

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] See figure 1 , which is an overall connection diagram of a current integrating type power detection device according to an embodiment of the present invention. The load 101 is arranged between the live line L and the neutral line N, and forms a loop. The current integrating type power detection device 103 of the present invention includes a current sampling resistor R and a power detection module 105 . The current sampling resistor R is connected in series in the current loop of the load 101, and the current sampling resistor R can also be replaced by other resistive elements. Voltage. The p...

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Abstract

The invention provides a current integration type power detection device and a power detection module, and the current integration type power detection device comprises a current sampling resistor and the power detection module. The current sampling resistor is connected in an AC loaded circuit loop in series. The power detection module is in parallel connection with the current sampling resistor and also includes a filter circuit, a voltage-controlled current source, a constant current source, an integrating capacitor and a hysteresis loop comparator. The filter circuit is connected with the current sampling resistor in parallel. The voltage-controlled current source is connected to the filter circuit. The integrating capacitor is connected with the voltage-controlled current source and the constant current source respectively. The hysteresis loop comparator is connected to the integrating capacitor. The power detection device and module have the advantages of high detection precision and low costs.

Description

technical field [0001] The invention relates to the field of AC power monitoring, in particular to a current integral type power detection device and a power detection module for accurately detecting load power with a non-sinusoidal current. Background technique [0002] Power is a standard to measure whether the load is working normally. In the fields of industrial control, smart home, smart building, and smart transportation, AC power is often measured and monitored. For example, in the smart switch products in the home, the linkage control of the power consumption products is realized by monitoring the load power; as another example, in the smart building, the power limit alarm is realized by monitoring the load power. Applications like this are vast. When the load is connected to an AC power source, since the current passing through the load is AC, it is usually necessary to calculate the effective value of the AC current first, and then measure the power consumed by th...

Claims

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Application Information

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IPC IPC(8): G01R21/00G01R19/02
Inventor 遇彬靳旭哲王霄峡
Owner HANGZHOU ZHENGU TECH
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