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Main and standby power supply switching device

A switching device, main and standby power supply technology, applied in circuit devices, emergency power supply arrangements, electrical components, etc., can solve the problems of repeated fluctuations in main and standby power supply voltage, no consideration of the upper limit of switching, and single set value of switching, etc. Easy and fast switching function, avoiding the risk of repeated switching of the main and backup power supplies, and avoiding the effect of voltage superposition

Pending Publication Date: 2022-04-12
FAW VOLKSWAGEN AUTOMOTIVE CO LTD
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] Although the existing main and standby power supply switching circuits can realize the switching function, the switching setting value is a single threshold, and only the switching lower limit threshold is set, that is, only the undervoltage situation is considered, and the switching upper limit is not considered.
Moreover, the existing main-standby power supply switching circuit can only realize the switching of voltage presence or absence, and repeated fluctuations in the voltage of the main-standby power supply at a certain moment may occur
The above defects may cause certain damage to the load

Method used

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  • Main and standby power supply switching device
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Embodiment Construction

[0020] The principle and spirit of the present disclosure will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are given only to enable those skilled in the art to better understand and implement the present disclosure, but not to limit the scope of the present disclosure in any way.

[0021] In one aspect, the embodiments of the present disclosure provide an active / standby power switching device. refer to figure 1 , which shows a schematic block diagram of an active / standby power switching device 100 according to an embodiment of the present disclosure. Such as figure 1 As shown, the main / standby power switching device 100 includes a threshold setting unit 101 , a switch control unit 102 and a main / standby power switching unit 103 .

[0022] refer to figure 2 , which shows a circuit diagram of an active / standby power switching device according to an embodiment of the present disclosure. Such as figure ...

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Abstract

The main and standby power supply switching device comprises a threshold setting unit, a switch control unit and a main and standby power supply switching unit. The threshold setting unit comprises a first arithmetic device and a second arithmetic device and is used for comparing the main power supply with an upper limit voltage threshold and a lower limit voltage threshold. The switch control unit comprises a first transistor and a second transistor and is used for connecting or disconnecting the circuit branches. And the main and standby power switching unit comprises a third transistor, a fourth transistor, a first diode, a second diode and an anti-backflow device, and is used for realizing the switching of the main and standby power supplies according to the on-off condition of the circuit branches. The device is a circuit capable of switching the main power supply and the standby power supply within a certain threshold range, the risk of voltage superposition and repeated switching of the main power supply and the standby power supply can be avoided, voltage within a stable range is provided for a load, the circuit is simple, and a rapid switching function is easy to realize.

Description

technical field [0001] Embodiments of the present disclosure generally relate to the technical field of power management, and more specifically, relate to an active / standby power switching device. Background technique [0002] With the development of science and technology and the continuous application of Internet technology, the controllers of various devices have to have the function of keeping online in real time or going offline after working for a certain period of time. At the same time, energy management puts forward higher requirements on the power consumption of the controller when it is in standby, so more and more controllers integrate small batteries (dry batteries or lithium batteries) as backup power sources to reduce the energy consumption of the batteries of the equipment itself. Therefore, an effective main-standby power switching circuit is required. [0003] Although the existing main-standby power supply switching circuit can realize the switching funct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06
CPCY02B70/30Y04S20/20
Inventor 刘喜会杨文辉
Owner FAW VOLKSWAGEN AUTOMOTIVE CO LTD
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