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Double supply automatic switch-over circuit

An automatic switching and dual power supply technology, which is applied in battery circuit devices, electric vehicles, circuit devices, etc., can solve the problems of decreased driving ability and increased delay time, and achieves the effect of ultra-low power consumption control

Inactive Publication Date: 2008-11-19
SHENZHEN GIANTSEA INSTR & EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the operating voltage is reduced, the power consumption is reduced, but it also brings new problems such as increased delay time, reduced driving capability, and low threshold voltage control.
Therefore, when designing the circuit, it is impossible to simply rely on reducing the power supply voltage to meet the needs of power consumption

Method used

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  • Double supply automatic switch-over circuit

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Embodiment Construction

[0019] Please refer to Figure 1, where 10V comes from the power supply, and the output is 10VDC after switching power supply; J1 comes from a 9V industrial battery.

[0020] The connection relationship of the dual power supply automatic switching circuit is as follows.

[0021] The anode of a diode D19 is connected to the power supply, and the cathode is connected to the input terminal of a three-terminal voltage stabilizing device U16. The input terminal of the three-terminal voltage stabilizing device U16 is grounded through a capacitor C28, and the ground terminal is connected to the anode of a diode D20. The cathode of D20 is grounded, the output terminal is grounded through a capacitor C26, and the output terminals of the three-terminal voltage regulator U16 are respectively connected to the anodes of diodes D18 and D25, and the cathode of diode D25 is connected to the interrupt wake-up port GP1 of the microcontroller through a resistor R49 (PC WAKEUP). The cathode of th...

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Abstract

Disclosed is a dual power automatic switch circuit which includes a dynamical power and a battery. The positive pole of a diode D19 is connected with the input of a three-terminal voltage stabilizer U16 whose output is connected with a fieldistor Q3 through a diode D18; the fieldistor Q3 is connected with a fieldistor Q5; the positive pole of a diode D24 is connected with the dynamical power, and the negative pole of the diode D24 is connected with the fieldistor Q5; the dynamical power is connected with the gate of a fieldistor Q2; the battery is connected with the source of the fieldistor Q2 whose drain is connected with the input of a low dropout linear voltage stabilizer U14 through a diode D16; the output of the low dropout linear voltage stabilizer U14 is connected with a MCU U15 which is connected with a master MCU U6. The dual power automatic switch circuit of the invention has the advantages that the undisturbed automatic switch of the power is realized by combining the software and using two MCUs, and the system has the ultra-low power consumption control at the same time.

Description

【Technical field】 [0001] The invention relates to an automatic control engineering, in particular to a dual power supply automatic switching circuit. 【Background technique】 [0002] In the industrial automation control system, 380VAC or 220VAC power supply is generally used to power the equipment, but at the same time, it is necessary to record the modification of relevant parameters without power supply, which requires the use of batteries as a backup power supply. In the case of dual power supply, the battery consumption should be zero when the power supply is powered, and it is required to realize the automatic undisturbed switching of the two power supplies, and at the same time. Using batteries for power supply puts forward new requirements on the power consumption of the circuit. Therefore, the development and application of low-voltage and low-power circuits have attracted much attention. The power consumption of the system can be controlled from several aspects: 1....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J9/06
CPCY02B70/30Y04S20/20
Inventor 匡付华朱丁才李雪海谢恢兴
Owner SHENZHEN GIANTSEA INSTR & EQUIP CO LTD