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Power switching circuit capable of setting power priority and power switching method

A technology for power switching and switching circuits, which is applied to terminal battery switching devices, etc., can solve problems such as the inability to meet market demands, and achieve the effects of easy power switching, simple circuit, and low power consumption

Active Publication Date: 2019-03-26
JIANGSU LINYANG ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the single auxiliary power supply priority power supply method can no longer meet the market demand.

Method used

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  • Power switching circuit capable of setting power priority and power switching method
  • Power switching circuit capable of setting power priority and power switching method
  • Power switching circuit capable of setting power priority and power switching method

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with embodiment, but protection scope of the present invention is not limited to this:

[0028] combine figure 1 As shown, it is the functional block diagram of the power switching circuit that can set the priority of the power supply. A control circuit and a switching circuit are added between the two power supplies, and then the control signal VAUX_CTL can be given by the MCU to control the switching circuit, and the switching circuit will be based on this signal. The corresponding power supply priority is controlled through a series of level changes. The switching circuit is characterized by the use of several low-cost transistors and suitable resistors to control the priority of the power supply. When it is necessary to change the priority of the power supply, there is no need to change the circuit design, only the MCU needs to output a level signal to achieve the purpose of controlling the priori...

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Abstract

The invention discloses a power switching circuit capable of setting power priority and a power switching method. The power switching circuit comprises a control circuit and a switching circuit, wherein an MCU performs state control on a triode of the switching circuit through the control circuit. The problem that the priority of power supply cannot be changed when an intelligent ammeter is powered by two independent power supplies at the same time can be effectively solved. Compared with a dedicated power chip, the power switching circuit disclosed by the invention has high universality, and the switch of power priority can be effectively realized without using a dedicated power chip. The power switching circuit disclosed by the invention has the advantages of low cost and easiness in maintenance, and a large number of the power switching circuits can be conveniently applied; and the power switching circuit with low cost and settable priority can be applied to most of existing power systems.

Description

technical field [0001] The invention relates to a power switch circuit of an electric energy meter with two independent power supplies, and is especially suitable for occasions where there is a pressure difference requirement for the output of two power supplies, priority can be set, and real-time switching is possible. Background technique [0002] With the increasing demand for electricity in industry, agriculture, commerce and residential life in social life, people's transactions of electric energy are becoming more and more frequent. The electric energy meter is a measuring instrument for measuring the amount of electric energy transactions. Its technical requirements are very high, and it requires accuracy and stability. , and ensure long-term reliability. Among them, the smart energy meter with auxiliary power supply has two power supply modes: main power supply and auxiliary power supply, and the two power supply modes are independent of each other. In order to meet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/36
CPCH02J7/36
Inventor 张美仙蔡春雷杨金土袁金晶朱佳伟
Owner JIANGSU LINYANG ENERGY CO LTD