Positive bias high-end current detection circuit and electrical equipment applying same

A current detection circuit, positive bias technology, applied in the direction of measuring current/voltage, measuring only current, instruments, etc., can solve the problems of neglecting application innovation and improvement, high development process cost, low sampling resolution, etc., to avoid uncertainty performance, improve product reliability, and reduce the effect of sampling current distortion

Pending Publication Date: 2021-03-02
VATTI CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, this kind of current detection circuit has risk problems such as inaccurate sampling due to fluctuations in the sampling voltage and low sampling resolution due to too small voltage drop on the sampling resistor when the lo

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  • Positive bias high-end current detection circuit and electrical equipment applying same

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Example Embodiment

[0023]Example 1

[0024]The embodiment of the present invention provides a positive bias high-end current detection circuit, such asfigure 1As shown, it includes a current transformer sampling module 1 for isolating and sampling high-end current and a positive bias detection module 2 for outputting a positive bias of the high-end current sampled by the current transformer sampling module 1. The current transformer The sampling module 1 is electrically connected to the positive bias detection module 2.

[0025]In this way, the current transformer sampling module 1 is used to isolate and sample the high-end current, and the positive bias detection module 2 is used to detect the positive bias output of the high-end current sampled by the current transformer sampling module 1, thereby abandoning the single-resistance low-end sampling current method and avoiding Ground potential fluctuations cause inaccurate sampling, reduce sampling current distortion and avoid output uncertainty when the loa...

Example Embodiment

[0043]Example 2

[0044]Embodiment 2 of the present invention provides an electrical device, which includes the positive bias high-side current detection circuit described above.

[0045]Among them, electrical equipment is high-power electrical equipment such as range hoods and steam ovens.

[0046]The electrical equipment of the present invention isolates and samples the high-end current through the current transformer sampling module, and detects the positive bias output of the high-end current sampled by the current transformer sampling module through the positive bias detection module, thereby abandoning the single-resistance low-end sampling current mode and avoiding Inaccurate sampling due to ground potential fluctuations, reducing sampling current distortion and avoiding the uncertainty of output when the load is zero, low cost, high accuracy, and improved product reliability.

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Abstract

The invention discloses a positive bias high-end current detection circuit and electrical equipment using the same. The circuit comprises a current transformer sampling module for isolating and sampling a high-end current, and a positive bias detection module for carrying out the positive bias output of the high-end current sampled by the current transformer sampling module. The current transformer sampling module is electrically connected with the positive bias detection module. According to the positive bias high-end current detection circuit, high-end current is isolated and sampled throughthe current transformer sampling module, and positive bias output detection is carried out on the high-end current sampled by the current transformer sampling module through the positive bias detection module, so that a single-resistor low-end current sampling mode is abandoned, the sampling inaccuracy caused by ground potential fluctuation is avoided, the sampling current distortion is reduced,the output uncertainty when the load is zero is avoided, the cost is low, the accuracy is high, and the product reliability is improved.

Description

technical field [0001] The invention belongs to the technical field of current detection, and in particular relates to a positive bias high-end current detection circuit and electrical equipment using the same. Background technique [0002] Regarding the current detection circuit in the market, the method of "sampling the voltage with a series resistor" is generally adopted to obtain the instantaneous current of the relevant load. [0003] However, this kind of current detection circuit has risk problems such as inaccurate sampling due to fluctuations in the sampling voltage and low sampling resolution due to too small voltage drop on the sampling resistor when the load is light. Raising the limit while ignoring the innovation and improvement of this part of the application directly leads to objective phenomena such as low product reliability, high development process costs, and brand quality decline. Contents of the invention [0004] In order to solve the above problems...

Claims

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Application Information

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IPC IPC(8): G01R19/00
CPCG01R19/0092
Inventor 李耀聪潘叶江
Owner VATTI CORP LTD
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