JPH02139446U

JPH02139446U -

Info

Publication number: JPH02139446U
Application number: JP4940289U
Authority: JP
Priority date: 1989-04-26
Filing date: 1989-04-26
Publication date: 1990-11-21

Description

[Brief explanation of drawings]

第１図は本考案に係る電源バツクアツプ装置の
構成例を示す図、第２図は第１図装置の各信号の
タイムチヤート、第３図は従来例を示す図である
。ＳＷ１〜ＳＷ３…スイツチ、３…電源異常検出
器、６…バツテリ、７…コントローラ、８…−
Ｖ変換器、１０…演算器。 FIG. 1 is a diagram showing a configuration example of a power backup device according to the present invention, FIG. 2 is a time chart of each signal of the device shown in FIG. 1, and FIG. 3 is a diagram showing a conventional example. SW1 to SW3...Switch, 3...Power abnormality detector, 6...Battery, 7...Controller, 8...-
V converter, 10... computing unit.

Claims

[Claims for Utility Model Registration] A first switch SW1 that applies the power supply voltage to the load, a second switch SW2 that applies the voltage of the backup battery to the load, a third switch SW3 that applies the power supply voltage to the backup battery, and a power supply. A power supply abnormality detector that activates the output signal and turns off the first and third switches when the voltage is below the set value VA, and a signal that detects the current flowing to the load and responds to the average or effective value of this current. When the output signal of the current detection means that outputs the current detection means and the power abnormality detector becomes active, the second switch is turned on, and when the output value of the current detection means is less than or equal to the set value VB, the second switch is turned off, and the output signal of the power supply abnormality detector is turned on. A power backup device comprising: a controller that keeps the second switch on in the above case;