Automatic switching circuit for supplying power to city and battery
A circuit and battery technology, applied in the field of circuits, can solve the problems that the DC power supply cannot be completely cut off, the power consumption cannot be determined, and achieve the effect of avoiding additional consumption, avoiding consumption and prolonging working time.
Active Publication Date: 2011-08-31
SHANGHAI YAOHUA WEIGHING SYST
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
When AC power and DC power exist at the same time, the DC power cannot be completely cut off, and there is still power consumption that cannot be determined
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0009] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0010] figure 2 Among them is an automatic switching circuit powered by commercial power and batteries, including a DC power interface 1 and an AC power interface 3, which is characterized in that the DC power interface 1 is connected to the first input end of the voltage stabilizer 2, and the voltage stabilizer 2 The output terminal is connected to the voltage-stabilizing output terminal 8, the AC voltage interface 3 is connected to the input terminal of the AC-DC conversion circuit 4, the first output terminal of the AC-DC conversion circuit 4 is connected to the voltage-stabilizing output terminal 8, and the first output terminal of the AC-DC conversion circuit 4 The two output ends are connected with the input end of the AC power detection circuit 5, the output end of the AC power detection circuit 5 is connected with the first input end of the D...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an automatic switching circuit for supplying power to a city and a battery. A DC power supply interface is connected with the input end of a voltage stabilizer, and the output end of the voltage stabilizer is connected with the voltage stabilizing output end; an AC voltage interface is connected with the input end of an AC / DC switching circuit, the first output end of the AC / DC switching circuit is connected with the voltage stabilizing output end, and the second output end of the AC / DC switching circuit is connected with the input end of an AC power supply detecting circuit; the output end of the AC power supply detecting circuit is connected with the first input end of a DC power supply control circuit; the second input end of the DC power supply control circuit is connected with an SCM interface, and the output end of the DC power supply control circuit is connected with the control end of the voltage stabilizer. The invention can completely cut off a DC power supply during AC power supply and prevents the consumption of the DC power supply. A feedback circuit of the AC / DC switching circuit has no current during DC power supply, thereby preventing the extra consumption of the DC power supply and prolonging working time of the DC power supply.
Description
technical field [0001] The invention relates to the field of circuits, in particular to an automatic switching circuit powered by commercial power and batteries. Background technique [0002] Many meters are available in both AC mains and DC battery modes. As shown in Figure 4-1, U24 is a linear voltage regulator for DC power supply, and the following circuit is an AC-DC switching power supply with U15 as the core, which is a voltage regulator circuit for AC power supply. If the two power supplies are simply connected directly as shown in Figure 4-1, when only batteries are used for power supply, the feedback circuits U20 and U23 of the switching power supply still have considerable current passing through, which increases battery power consumption and reduces working time. When the AC power supply and the DC power supply exist at the same time, the DC power supply cannot be completely cut off, and there is still power consumption that cannot be determined. Contents of th...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02J9/06
Inventor 徐平均
Owner SHANGHAI YAOHUA WEIGHING SYST