Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Program-controlled over-current protection circuit and realization method thereof

An over-current protection circuit, over-current protection technology, applied in the direction of emergency protection circuit devices, over-current protection, circuit devices, etc., to achieve the effects of improving accuracy, avoiding ground noise, and improving flexibility

Active Publication Date: 2016-10-26
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the needs of automatic testing and high-precision program control, the existing over-current protection circuit has been unable to meet, so a reliable, simple and effective high-precision program-controlled over-current protection circuit and its implementation method are needed to solve the above problems

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
  • Program-controlled over-current protection circuit and realization method thereof
  • Program-controlled over-current protection circuit and realization method thereof
  • Program-controlled over-current protection circuit and realization method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0039] Such as figure 1 The program-controlled overcurrent protection circuit shown includes a current detection operation circuit 1, an overcurrent programming operation circuit 2, a level comparison conversion circuit 3, a protection duration control circuit 4, a threshold setting control circuit 5, a protection trigger clearing circuit 6 and Protection shutdown reset circuit 7;

[0040] The current detection operation circuit 1 is configured to perform I-V conversion on the weak current detection signal and convert it into a voltage signal;

[0041] The overcurrent programming operation circuit 2 is configured to compare and operate the voltage signal and the overcurrent programming signal to obtain an overcurrent protection analog signal;

[0042] The level comparison conversion circuit 3 is configured to convert the over-current protectio...

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 program-controlled over-current protection circuit and a realization method thereof, and belongs to the field of test. A differential operational amplifier is used as the input stage, which improves the accuracy of over-current protection and avoids influence such as noise. A protection length control circuit is adopted, and the over-current protection signal rising time and the protection state locking time are designed reasonably, so false protection triggering caused by instant current overshoot is eliminated effectively, and the phenomenon of protection dithering is avoided. A protection trigger clear circuit is used to make the protection state program-controlled. A protection shutoff reset circuit is used to quickly shut off a power circuit.

Description

technical field [0001] The invention belongs to the technical field of testing, and in particular relates to a program-controlled overcurrent protection circuit and a realization method. Background technique [0002] Existing overcurrent protection circuits generally use resistors for current sampling, that is, through special precision sampling resistors, the current signal is converted into a voltage sampling signal, and then the voltage sampling signal is compared with the reference voltage of the current protection point to generate overcurrent protection. signal to control and turn off the PWM output, so as to achieve the over-current protection function. At present, there are common problems such as low precision of protection points, false triggering and difficulty in program control. In the program-controlled power supply, especially when the program-controlled DC power supply provides excitation, there are various back-end loads, including inductive loads and capac...

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): H02H3/08H02H3/06
CPCH02H3/066H02H3/08
Inventor 王文廷李斌王俊王群栗永强汪定华吕士如
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com