Power supply type identification method and circuit and automatic change-over switch

A type identification and power supply technology, applied in the low-voltage electrical field, can solve the problems of a wide variety of products and complex user selection, and achieve the effect of low cost and simple structure

Active Publication Date: 2017-05-31
CHANGSHU SWITCHGEAR MFG CO LTD (FORMER CHANGSHU SWITCHGEAR PLANT)
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, among the existing automatic transfer switch products, those suitable for AC occasions need to use AC-type products, and those suitable for DC occasions need to choose DC-type products. Products of one power supply type can only be used in the corresponding power supply environment. Its circuit and The software design is also determined accordingly, resulting in a wide variety of products and complicated user selection.

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Power supply type identification method and circuit and automatic change-over switch
  • Power supply type identification method and circuit and automatic change-over switch
  • Power supply type identification method and circuit and automatic change-over switch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0029] Aiming at the problem of automatic identification of AC and DC power supplies, the present invention proposes a power supply type identification method, using a voltage A / D sampling circuit to sample the output voltage of the power supply to be identified, and the variance of the voltage A / D sampling value within a preset period Compared with the preset AC-DC distinguishing threshold, if it is greater than the AC-DC distinguishing threshold, the power source to be identified is an AC power source; otherwise, the power source to be identified is a DC power source.

[0030] Among them, the voltage A / D sampling circuit can adopt various existing circuit structures. In consideration of safety and anti-interference, the present invention preferably adopts an isolated voltage A / D sampling circuit, especially an optocoupler isolated voltage A / D sampling ...

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

No PUM Login to view more

Abstract

The invention discloses a power supply type identification method, and belongs to the technical field of low-voltage electricity. Output voltage of a to-be-identified power supply is sampled by using a voltage A / D sampling circuit, and a variance of a voltage A / D sampling value within a preset cycle is compared with a preset AC / DC distinguishing threshold; if the variance is greater than the AC / DC distinguishing threshold, the to-be-identified power supply is an AC power supply; or else, the to-be-identified power supply is a DC power supply. The invention further discloses a power supply type identification circuit and an automatic change-over switch. Whether the power supply is the DC power supply or the AC power supply can be quickly and accurately identified independently, and the power supply type identification circuit is simple in structure and low in implementation cost and has a good application prospect.

Description

technical field [0001] The invention relates to a power source type identification method and circuit capable of automatically identifying AC and DC power sources, and belongs to the technical field of low-voltage electrics. Background technique [0002] At present, the automatic transfer switch has been widely used as the necessary equipment for the important load in the low-voltage line, which is not allowed to cut off the power, so as to complete the automatic conversion of the power supply of the dual-channel or multi-channel power supply system and ensure the reliability of the power supply of important users. However, among the existing automatic transfer switch products, those suitable for AC occasions need to use AC-type products, and those suitable for DC occasions need to choose DC-type products. Products of one power supply type can only be used in the corresponding power supply environment. Its circuit and The software design is also determined accordingly, resul...

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
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/40G01R31/42
CPCG01R31/40G01R31/42
Inventor 顾怡文钱宽季春华
Owner CHANGSHU SWITCHGEAR MFG CO LTD (FORMER CHANGSHU SWITCHGEAR PLANT)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap